NC0005088_CSS_Appendix B_20191231

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
APPENDIX B
COMPREHENSIVE SITE ASSESSMENT UPDATE REPORT
REVIEW COMMENTS AND RESPONSES
2018 Comprehensive Site Assessment Update Report - Responses to June
29, 2018 Comments
2018 Comprehensive Site Assessment Update Report - Responses to July
171 2018 Specific Comments Pertinent to Individual Source Areas
Tables
Table 1 U5 AB White Substance Observation Dates
Table 2 Horizontal Hydraulic Gradients and Flow Velocities
Table 3 Vertical Hydraulic Gradients - AAB and ASA
Table 4 Vertical Hydraulic Gradients - U1-4 AB
Table 5 Vertical Hydraulic Gradients - U5 AB
Table 6 Sampling Results - Outfall 002
Table 7 CAP Update - Excluded Data Summary
Table 8 Geochemical Transect Monitoring Wells and Wells Perpendicular
to Transects
Table 9 Surface Water Analytical Results
Figures
Figure 1 Ash Thickness Map - AAB
Figure 2 Ash Thickness Map - U5 AB

Appendix B Comprehensive Site Assessment Update Report
Review Comments Responses December 2019
Cliffside Steam Station SynTerra
1.0 OVERVIEW OF CSA UPDATE REPORT DEFICIENCIES
Overview of CSA Update Report Deficiencies Comment 1
Delineation of groundwater exceedances is, for certain areas and constituents, incomplete or in
need of revision.
Response Summary - 1
The locations of groundwater exceedances are refined and more thoroughly
delineated in the CAP Update report. Discussions regarding the groundwater
exceedances at or beyond the ash basin compliance boundaries are provided in CAP
Update Sections 6.1.2 through 6.1.5, 6.10.2 through 6.10.5, and 6.19.2 through 6.19.5.
Figures depicting the horizontal and vertical extent of groundwater exceedances are
also provided in the CAP Update report cross-section figures (Figures 6.8a through
6-11c, 6-43a through 6-44c, and 6-69a through 6-71c) and isoconcentration figures
(Figure 6-17 through 6-28, 6-46 through 6-56b, and 6-75a through 6-85). Additional
monitoring wells have been installed since the CSA Update report was issued. The
groundwater analytical results from these additional monitoring wells have been
used to refine the delineation of the horizontal and vertical extent of groundwater
exceedances as presented in the CAP Update. The horizontal and vertical
delineations of groundwater exceedances associated with the active ash basin
(AAB), ash storage area (ASA), former Units 1-4 ash basin (U14 AB) and the Unit 5
inactive ash basin (U5 AB) presented in the CAP Update is complete.
Overview of CSA Update Report Deficiencies Comment 2
Report contents are presented in a data summary format with a lack of conclusive data analysis
and interpretation of site conditions.
Response Summary - 2
The report contents are presented in data summary format to clearly provide the
facts regarding site characterization. Duke Energy disagrees with the comment that
data analysis conclusions and interpretation of site conditions were not provided.
However, a more thorough discussion and data analysis regarding site conditions
and conclusions are provided in the CAP Update report supported with tables,
figures and modeling results as specified in the CAP Content Guidance (April 27,
2018 and September 10, 2019 NCDEQ letters).
Overview of CSA Update Report Deficiencies Comment 3
An understanding of the major factors that control contaminant distribution and transport
within each source area is incomplete.
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Response Summary - 3
Section 5 of the CAP Update is an updated understanding of the Cliffside
Conceptual Site Model (CSM). This section of the report provides an updated
robust understanding of the major factors that are controlling contaminant
distribution and transport for each of the source areas (AAB, ASA, U14 AB, and U5
AB) at the Site. The updated CSM incorporates information provided by the
updated flow and transport modeling, results of the deep bedrock well assessment,
updated geochemical modeling, and pumping tests performed at the Site. The
results of the flow and transport modeling has increased the understanding of the
site's current conditions, and is used to predict conditions after AAB decanting, and
the site post -closure conditions under two different closure scenarios. The model
predicts groundwater flow directions and velocities and the maximum extent of
contaminant transport.
Overview of CSA Update Report Deficiencies Comment 4
Concentration -distance and concentration -time plots needed to help understand contaminant
transport and plume characteristics are, in several cases, not constructed properly or interpreted
correctly.
Response Summary - 4
This comment states that data plots are "in several cases, not constructed properly or
interpreted correctly", but provides no specifics in terms of which data plots this
comment refers to, nor the specifics regarding deficiencies.
Updated concentration -distance and concentration -time plots are included in the
monitored natural attenuation (MNA) report (CAP Update Appendix I). These
figures were used to evaluate plume stability in the MNA report. Also, the refined
groundwater flow and transport model (CAP Update Appendix G) and the
geochemical model (CAP Update Appendix H) have been updated and are used to
help understand contaminant transport and plume characteristics throughout the
interpretations provided in the CAP Update report.
Overview of CSA Update Report Deficiencies Comment 5
Potentiometric mapping and understanding of groundwater flow directions are, in certain areas,
unreliable or appear to be incorrect.
Response Summary - 5
This comment states that maps and flow directions "in certain areas" are unreliable or
incorrect, but provides no specifics in terms of which areas this comment refers to
nor the reasons why the maps or interpreted flow directions are incorrect.
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Updated potentiometric mapping is provided in the CAP Update report (Figures 5-
4a through 5-5c). The groundwater elevations used to produce these figures
included additional wells installed after the issuance of the CSS CSA Update report.
These additional wells refined the understanding of groundwater flow direction on
the site. Surface water elevations were surveyed concurrently with the water level
gauging event and used to further refine the water level maps.
Overview of CSA Update Report Deficiencies Comment 6
The report does not acknowledge that closure planning, corrective action planning, and risk
evaluation are needed for each source area individually rather than for the facility as a whole, as a
result, individual source areas are not described or assessed with adequate specificity.
Response Summary - 6
The CAP Update report is separated and discussed by source area with the format
and content requested by NCDEQ in the April 27, 2018 CAP content guidance
supplemented on September 10, 2019. Closure planning, corrective action planning
and risk evaluation are considered per source area. The AAB and adjacent ASA
(Section 6.1- 6.9), U1-4 AB (Section 6.10 - 6.18), and U5 AB (Section 6.19 - 6.27) are
described and assessed individually in the report.
Overview of CSA Update Report Deficiencies Comment 7
The report states that CCR poses no risk to private supply wells near the facility; the rationale
and evidence used to substantiate this position is incomplete.
Response Summary - 7
An additional evaluation of the analytical results in samples collected from private
water supply wells near CSS is presented in Sections 6.2.2.2 (AAB and ASA),
6.11.2.2 (U1-4 AB), and 6.20.2.2 (U5 AB) of the CAP Update. A well -by -well
summary of groundwater comparison criteria exceedances in the private water
supply wells is provided in CAP Update Table 6-9. The findings of the water supply
well evaluation found that no private drinking water wells are impacted by COIs
attributable to the CSS ash basins.
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Review Comments Responses December 2019
Cliffside Steam Station SynTerra
2.0 CSA UPDATE REPORT FORMAL COMMENTS AND RESPONSES
DELINEATION OF GROUNDWATER CONTAMINATION
NCDEQ Formal Comment 1 (page 1 of 6)
Delineation of groundwater contamination (horizontal and vertical extent and regulatory
exceedances) is incomplete or in need of revision. Isoconcentration maps must depict all available
data to include Appendix III and Appendix IV constituents from all sampled wells, including
CCR wells and wells shown as "NM" (not measured) turbidity'. Boron in wells with elevated
pH/turbidity must be used in isoconcentration maps. Provisional Background Threshold Values
(PBTVs) above 15A NCAC 02L.0202 groundwater quality standards (2L) or Interim Maximum
Allowable Concentrations (IMAC) should be contoured and identified as the regulatory
exceedance standard. PBTVs that have been revised since the report was submitted in January
need to be updated with the final BTV values for all mapping and interpretation.
2L/IMAC/PBTV contours should be shown as "open" when data do not exist downgradient of
the contour; several contours are incorrectly shown as "closed" and inappropriately imply that
exceedances do not occur past the contour line (e.g. fig. 11-16 for shallow cobalt; fig. 11-37 for
shallow vanadium; fig. 11-8 for deep boron; etc.). The position of the compliance boundary for the
active basin and ash storage area has been revised since the report was submitted; the revised
boundary should be used for all mapping and interpretations in all future submittals.
' Some wells were omitted (e.g. CCR-9D; etc.), and others were not properly contoured (e.g.
GWA-30BR, Fe = 8730 ug/L; etc.). Numerous wells with data were shown as "NM" (not
measured). And some CCR wells did not depict Appendix IV constituents (e.g. CCR-3BR,
CCR-4D, and CCR-5D).
Response to NCDEQ Formal Comment 1
Delineation of groundwater chemical constituents associated with the ash basins
(horizontal and vertical extent) as presented in the CAP Update is complete. Figures
presenting the distribution of COIs associated with each source area are presented in
the CAP Update report. Figures depicting the horizontal and vertical extent of
groundwater exceedances are also provided in the CAP Update report cross-section
figures (Figures 6.8a through 6-11c, 6-43a through 6-44c, and 6-69a through 6-71c)
and isoconcentration figures (Figure 6-17 through 6-28, 6-46 through 6-56b, and 6-
75a through 6-85). The figures are presented for conservative, variable and non -
conservative COIs. These figures include available data (through June 30, 2019)
including CCR Rule Appendix III and Appendix IV constituents from all sampled
wells, including CCR wells and wells where field parameter data is not available
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Cliffside Steam Station SynTerra
(where applicable). Boron results in wells with elevated pH/turbidity readings have
been used in the figures.
Groundwater background values which are greater than their respective 02L
standard or IMAC have been contoured and identified as the regulatory standard on
the figures. Groundwater background values that have been revised since the 2018
CSA Update report have been updated for all mapping and interpretation.
The 02L standard/IMAC/background value contours are shown on the
isoconcentration figures using the best interpretation of site conditions
downgradient of the contour. This may or may not result in open contours
depending on professional judgement of site conditions.
The position of the compliance boundary for the AAB and ASA has been revised
since the 2018 CSA Update report. The revised compliance boundary has been used
in the CAP Update report on all figures. This revised compliance boundary includes
revisions to the property boundary and the compliance boundary northeast of the
AAB downstream dam to account for the Duke Energy property acquisition in this
location.
NCDEQ Formal Comment 2 (page 1 of 6)
Additional wells are needed to ensure adequate horizontal and (or) vertical) delineation in the
following areas
NCDEQ Formal Comment 2 — Sub -bullet 1
o Ash storage area: need a BR well at AS-8, and need sampling at CLP-1. Newly identified
Unit 6 source area: need a SID/BR well nest 200 ft north of GWA-42S, a SID/BR well
nest 150 ft west of SW-SC-6, and any other wells as needed.
Response to NCDEQ Formal Comment 2 — Sub -bullet 1
Bedrock monitoring well AS-8BR was installed at the north end of the ASA. CLP-1
was installed as a piezometer (water level only) monitoring point (there is no sand
pack, bentonite seal, etc). Based on discussion with NCDEQ, CLP-1 was sampled
and analyzed for boron only in January 2019 (204 ug/L). Monitoring wells AS-
9D/BR were installed at the north end of the ash storage area near CLP-1. These
wells were sampled and analyzed for the full CAMA analytical suite of constituents
in April and June, 2019. The location of these wells is depicted on Figure 1-2 in the
CAP Update report, and the analytical results from these groundwater monitoring
wells are included in Appendix C, Table 1.
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To further assess the exceedances east of Unit 6 and west of Suck Creek, monitoring
well nests GWA-57S/BRU/BR (approximately 200 feet north of GWA-42S) and
GWA-58S/BRU/BR (approximately 150 ft west of SW-SC-6 were installed in March
and April, 2019. Three (3) additional well nests were installed based upon with
discussions with NCDEQ (GWA-60BRU/BR, GWA-61BRU/BR, and GWA-
62BRU/BR). These wells were installed in March and April, 2019. The location of
these wells is depicted on Figure 1-2, and the analytical results from these
groundwater monitoring wells are included in Appendix C, Table 1. The
groundwater data from these monitoring wells are used throughout the CAP
Update report, and specifically as a line of evidence in the determination of the
exceedances east of Unit 6 and west of Suck Creek as a separate source area from the
AAB and to evaluate the potential for groundwater underflow beneath Suck Creek.
The preliminary results in this area and the discussion of the underflow of Suck
Creek are explained in detail in Section 5 in the CAP Update report.
NCDEQ Formal Comment 2 — Sub -bullet 2
o Active basin - west (dam): need a S/D/BR well nest 200 ft N or north-northeast of
CCR-9D. Also need well(s) beyond AB-3 to determine whether groundwater flow
direction is west toward Suck Creek or northwest toward the ash storage area, and wells
or analysis to assess underflow of Suck Creek in this area.
Response to NCDEQ Formal Comment 2 — Sub -bullet 2
Monitoring well nest GWA-59S/D/BR (north/northeast of CCR-91)) were installed in
March and April, 2019 to further assess the horizontal and vertical extent of boron
reported in the vicinity of monitoring well CCR-91). The location of these wells is
depicted on Figure 1-2, and the analytical results from these groundwater
monitoring wells are included in Appendix C, Table 1.
Monitoring wells AB-7S/BRU/BR and AB-8S/I/BRU/BR were installed to the north
and west of the AB-3 location in March and April, 2019. The data collected from
well clusters GWA-57S/BRU/BR and GWA-58S/BRU/BR were also used to further
evaluate the potential for groundwater underflow beneath Suck Creek. The flow and
transport model was also used to further refine the understanding of groundwater
flow direction in this area. Groundwater flow contours in the shallow, deep, and
bedrock flow layers from the April 2019 water level gauging event are provided in
Figures 5a/b/c.
Three (3) additional well nests were installed based upon with discussions with
NCDEQ to assess the area east of Unit 6 and west of Suck creek with groundwater
exceedances (GWA-60S/D/BR, GWA-61S/D/BR, and GWA-62S/D/BR). These wells
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were installed in March and April, 2019. The location of these wells is depicted on
Figure 1-2, and the analytical results from these groundwater monitoring wells are
included in Appendix C, Table 1. The groundwater results from these monitoring
wells are used throughout the CAP Update report, and specifically as a line of
evidence in the determination of the area east of Unit 6 and west of Suck Creek as a
separate area of exceedances from the AAB and to confirm underflow of Suck Creek.
The determination of the area east of Unit 6 and west of Suck Creek as a separate
source of exceedances and the discussion of potential groundwater underflow
beneath Suck Creek are explained in detail in the CAP Update report.
NCDEQ Formal Comment 2 — Sub -bullet 3
o Active basin - south: need well(s) to determine whether groundwater flow direction is
northwest toward the dam at Suck Creek or to the southwest directly to Suck Creek in
the area of GWA-27DA, CCR-14D, and CCR-13D; need well(s) (or analysis) to
determine where boron in CCR-16S (2050 uglL) migrated since boron in CCR-16D is
BDL and, 200 ft downgradient, boron in GWA-47D is 300 uglL and rising.
Response to NCDEQ Formal Comment 2 — Sub -bullet 3
The flow and transport model helped to refine the understanding of groundwater
flow direction in the vicinity of monitoring wells GWA-27DA, CCR-14D, and CCR-
13D. Groundwater flow contours in the shallow, deep, and bedrock flow layers
from the April 2019 water level gauging event are provided in Figures 5-4a/b/c.
Monitoring wells GWA-63S/BRU were installed in March, 2019, northwest of CCR-
16S to attempt to determine where boron in CCR-16S is migrating. Based on the
refined groundwater flow directions (Figures 5-4a/b/c) and updated groundwater
flow and transport modeling (using the data from the newly installed wells,
Appendix G), the boron reported in CCR-16S does not appear to be migrating. The
boron concentrations reported in GWA-47D did appear to be rising with the greatest
concentration reported in August 2018 (399 ug/L). The boron concentration in this
well has generally been decreasing since this high concentration. Concentrations of
boron are expected to further decline in this well and in this area of the site as the
AAB decanting continues. The hydraulic head in the basin will no longer be present
and the amount of groundwater and associated COIs migrating in this direction are
expected to decrease. Velocity vector figures depicting pre -decanting conditions
(Figures 5-8a and 5-9a) and post closure conditions (Figures 5-8b/c and 5-9b/c) are
presented in the CAP Update.
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NCDEQ Formal Comment 2 — Sub -bullet 4
o Other: Wells are needed in various locations across the facility as proposed via email
from Ryan Czop to Ted Campbell on 4112118, as follows: GWA-21BRL, MW-11BRL,
CCR-9BRL, CCR-12BRL, GWA-11BRL, and CCR-U5-4BRL; the need for CCR-3BRL
and CCR-U5-3BRL is unclear and may be discussed further with the Asheville Regional
Office at the discretion of Duke.
Response to NCDEQ Formal Comment 2 — Sub -bullet 4
The deep bedrock monitoring wells (BRL) in referenced email were recommended
for installation directly adjacent to the ash basin dams and other areas of apparent
vertical constituent migration to improve the accuracy of the flow and transport
model predictions for the groundwater CAPs. The deep bedrock well locations are
presented on Figure 1-2 and the analytical data from these wells are provided in
Appendix C, Table 1. Results of the deep bedrock evaluation are provided in
Appendix F.
Deep bedrock well locations CCR-3BRL and CCR-U5-3BRL were installed as part of
the deep bedrock installation effort. Monitoring well CCR-U5-3 is on the
geochemical model transect in this area of the site. The deep bedrock well
installation locations and purpose were discussed with the NCDEQ Asheville
Regional Office (ARO) at a meeting with NCDEQ DWR central office participation
on August 22, 2018 at the NCDEQ ARO. During this meeting the NCDEQ ARO
personnel acknowledged the rationale behind the installation of these deep bedrock
wells. A discussion of the deep bedrock well installations, results and analysis are
incorporated into the CAP report and the updated flow and transport model.
NCDEQ Formal Comment 3 (page 2 of 6)
Ash and pore water delineation within the waste boundary is incomplete. Given the large size of
the source areas and the long and complex history of ash placement and coal chemistry makeup,
relatively few pore water locations were sampled, and few contaminant cross section maps were
presented. The geologic cross sections mapped across the waste boundaries do not sufficiently
describe the position, volume, and thickness of ash, saturated ash, and saturated ash post -de -
watering. At a minimum, as -built drawings and historic aerial/topographic maps need to be
assessed and presented in conjunction with ash boring data to augment the sparse number of
available data.
Response to NCDEQ Formal Comment 3
Relatively few pore water well locations exist in the AAB due to water being present
in the basin and the safety concerns associated with drilling operations in these
areas. The number and location of pore water wells were selected based on access
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and safety concerns associated with drilling in an ash basin. The locations of the
monitoring wells installed in the basin to monitor ash pore water were discussed
with NCDEQ at the time drilling began. Monitoring wells AB-7S/BRU/BR, AB-
8S/I/BRU/BR, and AB-9S/D/BR were installed in March and April, 2019, in the
central portion of the AAB. The ash thicknesses encountered during the installation
of these monitoring wells have been incorporated into the updated cross sections in
this portion of the site (Figures 6-2, 6-3, and 6-4).
Isopach figures depicting calculated ash thicknesses were provided to NCDEQ on
September 30, 2018. These figures were created using historical topographic maps,
recent ground surface survey data, boring logs, and bathymetric surveys. The
isopach figures have been used to map the extent, volume, and thickness of ash, and
the current saturated ash thicknesses. Using this information has provided an
adequate understanding with regards to the extent and thickness of ash to calibrate
the flow and transport model. The geologic cross sections figures included in the
CAP Update were updated to correspond to isopach information.
Ash thicknesses in the AAB ash basin are estimated to range from 0 to 80 feet with a
total volume of 3,162,675 cubic yards. The current saturated ash thickness in the
active ash basin is estimated to be 70 feet. Ash thicknesses in the U5 AB are
estimated to range from 0 to 90 feet with a total volume of 843,260 cubic yards. The
current saturated ash thickness in the Unit 5 inactive ash basin is estimated to be 55
feet. Ash thicknesses in the ASA are estimated to range from 0 to 60 feet with a total
volume of 12,357 cubic yards. The current saturated ash thickness in the ash storage
area is estimated to be 25 feet. The U14 AB was previously excavated.
Estimates of saturated ash thicknesses post -de -watering have been determined
based on closure scenarios and groundwater modeling. The estimated saturated
thickness of ash post -closure of the AAB under the closure -in -place scenario is 0 to
60 feet. The estimated saturated thickness of ash post -closure of the U5 AB under
the closure -in -place scenario is 0 to 50 feet. Ash within the ash storage area would
be excavated under either closure scenario, leaving no saturated ash in place.
NCDEQ Formal Comment 4 (page 2 of 6)
In addition, need discussion, by source area, of spatial variability of ash and pore water within
the waste boundary, whether the existing data are adequate to assess this variability, and if not,
what additional data are proposed. Need discussion about the adequacy (or lack) of data used to
map (interpolate/extrapolate) the ash and saturated ash in cross section. Need additional
contaminant cross sections and associated discussion of plume evolution from source to receptor.
If the ash will be capped -in -place as the method of source control, need discussion about the
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implications of the volume and location of saturated ash on contaminant concentrations and
migration. Cap -in -place inhibits infiltration but does not address lateral
groundwater/contaminant flow, the Corrective Action Plan (CAP) must explain how the lateral
component of groundwater flow and resulting contaminant flux will be addressed if source
material remains in place.
Response to NCDEQ Formal Comment 4
The history and description of waste material within the waste boundary for the
three source areas are discussed in Sections 6.1.1.1, 6.10.1.1, and 6.19.1.1 in the CAP
Update. It is acknowledged that wastewater concentrations vary within the waste
boundaries, both within a source area boundary, and between source areas. Due to
their age, operational history, and varied geochemical conditions, each of the source
areas have different COIs associated with them. The geochemical model (Appendix
H) describes in detail conservative, non -conservative, and variable COIs identified
at the site associated with the source areas. Source area data are pooled where
necessary in the CAP Update report to provide sufficient data to account for the
variability of source area concentrations. By pooling the data where necessary,
adequate data are available to assess the variability of ash and pore water within the
waste boundaries.
Cross sections with analytical results are presented as Figures 6-8a/b/c through 6-
11a/b/c, Figures 6-43a/b/c and 6-44a/b/c, and Figures 6-69a/b/c through 6-71a/b/c in
the CAP Update. Cross section N-N' in the south end of the AAB was created due to
this area of the basin having impacted groundwater concentrations. Associated
discussion of the plume evolution from source to receptor is provided in Sections
6.1 through 6.2, 6.10 through 6.11, and 6.19 through 6.20 of the CAP Update. The
ispopach figures were used to interpolate/extrapolate the ash and saturated ash in
the cross -sections through the ash basins.
Flow and transport model predictions of saturated ash thicknesses post -de -watering
have been determined based on closure scenarios and groundwater modeling. The
estimated saturated thickness of ash post -closure of the AAB under the closure -in -
place scenario is 0 to 60 feet. The predicted saturated thickness of ash post -closure
of the U5 AB under the closure -in -place scenario is 0 to 50 feet. Ash within the ash
storage area would be excavated under either closure scenario, leaving no saturated
ash in place.
Following closure planning and final modeling, more information concerning the
volume and location of saturated ash will be provided. The flow and transport
model will reflect the planned grading of the remaining ash and will consider the
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flux resulting from infiltration occurring upgradient of the impervious cap. The
CAP Update presents the results of the modeling and the supporting
documentation.
GW FLOW, CONTAMINANT FLOW, AND TRANSPORT
NCDEQ Formal Comment 5 (page 2 of 6)
Boron values within all wells (high pH/turbidity or otherwise) and independent of concentration
need to be presented and used to map horizontal and vertical extent, map 2L exceedances, and
interpret plume movement and (or) expansion. Ninety-one (91) wells at Cliffside contain boron
concentrations between background and 700 ug/L, but these boron values were not used to
understand contaminant migration downgradient of the source areas.
Response to NCDEQ Formal Comment 5
Boron values within all wells (high pH/turbidity or otherwise) have been presented
and used to map horizontal and vertical extent, to map 02L standard exceedances,
and to interpret plume movement and (or) expansion in the CAP Update. The
boron isoconcentration figures are presented as Figures 6-18a/b/c, 6-47a/b/c, and 6-
75a/b/c. All boron results (including those between background (50 ug/L) and 700
ug/L) were used to interpret and describe contaminant migration downgradient of
the source areas in the CAP Update. The boron plume was used to interpret the
flow and transport of impacted groundwater from the source areas at the site as
presented on the isoconcentration figures.
NCDEQ Formal Comment 6 (page 2 of 6)
An understanding of the major factors that control contaminant occurrence and transport is
incomplete. In describing the purpose (p. 1-1) and technical objectives (p. 1-6) of the
Comprehensive Site Assessment (CSA), the report does not acknowledge this central need.
Instead, the report mainly presents data results and summarizes them in the fashion of a data
summary report. Both General Statute 130A-309.209 and 02L .0106 (g) state that the site
assessment must understand the major factors that control contamination and its movement.
Although the report presents maps (isoconcentration and potentiometric maps) and plots
(concentration -distance and concentration -time), these do not provide an understanding of
factors controlling contaminant occurrence and transport. Specific well IDs, boring logs, and
potentiometric and contaminant data should be used to assess potential plume expansion,
potential plume movement, and contaminant migration through the three flow units (shallow,
deep, bedrock) as pore water moves through the groundwater system and discharges at receptors.
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Response to NCDEQ Formal Comment 6
The refined conceptual site model describing the major factors that control
contamination and its movement is presented in the CAP Update Section 5.
Site hydrogeologic data, source characterization data, and site monitoring data were
used to develop and update the flow and transport model. The model has been
used in addressing the requirements of .0106 and the requested information. Boron,
sulfate, and TDS plumes were modeled to predict the maximum horizontal and
vertical extent of these constituents over time. These constituents were used as a
proxy to evaluate where additional COIs identified on the site are expected to
migrate. The flow and transport model in conjunction with the geochemical model
were used to determine the maximum extent of COIs near or beyond the compliance
boundaries associated with the ash basins.
The MNA report (CAP Update Appendix I) describes the geochemical conditions,
plume characteristics, and presents COI migration predictions for each of the source
areas.
NCDEQ Formal Comment 7 (page 3 of 6)
Concentration -distance plots needed to help understand contaminant transport and plume
characteristics are, in several cases, not constructed properly or interpreted correctly. The plots
should utilize wells along a plume centerlinelsingular flow path, originate within a source, and
cover the same time period.' Need plots that utilize appropriately selected wells and need
accurate plot interpretations. Also, in its discussion of concentration -distance plots the report
makes no distinction between tracer -type contaminants (e.g. B and SO4) and contaminants
controlled largely by the local geochemistry (e.g. Fe, Mn, Tl, V, etc.) and thus blurs the
understanding of factors controlling concentrations with distance. The discussion should at a
minimum note that a) wastewater concentrations vary within the waste boundary, b) certain
contaminants are attenuated largely by dilution and dispersion (B, e.g.) while other
contaminants are attenuated by sorption and changes in local geochemical conditions (Fe, Mn,
Tl, e.g.), and c) results of geochemical modeling will be provided in the CAP. The discussion
could then attempt to explain how dilution and dispersion have affected the distribution of the
tracer -type contaminants using concentration -vs -distance and concentration -vs -time plots from
specific areas of concern.
' In many instances this was not the case. For example, the plots for the deep unit at Units 1-4
basin (figs. 1-55 to 11-57) used two source area wells (IB-4D and IB-3D) and one side -gradient
well (GWA-29D, which appears according to WL maps in the report, to receive GW flow from a
clean recharge area). Similar issues were noted for the plots associated with the other source
areas (e.g. MW-2DA is not on the same flow path as AS-6BRA according to the potentiometric
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map of fig. 6-20). And using flawed logic, page 11-9 states that boron (and others) show an
increasing trend, from source to downgradient in the bedrock flow unit, but the supposed
"source" well (AS-6BRA) is not actually positioned within the source therefore the
concentration -distance plot makes little sense. Other problems were noted. For example, some
plots included wells sampled two years apart (page 11-5) so it is not possible to know whether
the concentration changes are due to distance or time.
Response to NCDEQ Formal Comment 7
Updated concentration versus distance and concentrations versus time plots are
provided in the MNA report (CAP Update Appendix I). These figures are
constructed properly and interpreted correctly. The concentration verses distance
plots and the concentration versus time plots are presented in the MNA report (CAP
Update Appendix I).
It is acknowledged that wastewater concentrations vary within the waste
boundaries, both within a source area boundary, and between source areas. Due to
their age, operational history, and varied geochemical conditions, each of the source
areas have different COIs associated with them. The geochemical model (Appendix
H) describes in detail conservative, non -conservative, and variable COIs identified
at the site associated with the source areas.
NCDEQ Formal Comment 8 (page 3 of 6)
Concentration -time plots needed to help understand potential plume movement and (or)
expansion were, in some cases, constructed using wells of questionable relevance. Concentration -
time was plotted for a small handful of wells but it was not stated why those wells were selected
or why the results were meaningful. For example, the report shows boron -vs -time plots (figs. 11-
49 to 11-51) that omitted a key and informative well location, MW-20D. Boron has been
increasing in MW-20D (from 100 to 600 ug/L) over six years, calling into question whether
concentrations of this and other contaminants will continue to increase with time in this area of
groundwater discharge. The well that was plotted instead (GWA-21D), located 200 ft to the east,
shows boron with essentially no change over a three-year period (from 150 to 137 ug/L). It would
be useful to understand why concentrations are steadily increasing in MW-20D and are much
lower and unchanging in GWA-21D located 200 ft away. The discussion needs to provide a
narrative about plume movement or expansion and provide specificity (well IDs, boring logs,
and contaminant data). In addition, plots need to be constructed with a Y axis (concentration)
that allows discernment of meaningful concentration changes with time (use of arithmetic scale
is recommended over log scale).
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Response to NCDEQ Formal Comment 8
Some wells were omitted from the concentration -time plots because of frequently
high turbidity. In the CAP Update report and any subsequent reporting, these wells
and sampling events will be included with a call -out when turbidity could be of
concern. Y-axis will be changed to arithmetic scale.
Revised time versus concentration plots are provided in the MNA report (CAP
Update Appendix I). Plume characteristics and predictions of plume migration are
presented in the MNA report (CAP Update Appendix I).
NCDEQ Formal Comment 9 (page 4 of 6)
Potentiometric mapping and understanding of groundwater flow directions are, in certain areas,
unreliable or appear to be incorrect. Map revisions or improvements should address the
following issues:
NCDEQ Formal Comment 9 — Sub -bullet 1
o water level data are limited by a lack of wells or a lack of measurement in existing wells)
(e.g. the area near GWA-31, north-northwest of AB-4, north-northeast of GWA-39 in
figs. 6-15 to 6-20).
Response to NCDEQ Formal Comment 9 — Sub -bullet 1
The flow and transport model has refined the understanding of groundwater flow
direction in these areas. Deep dam wells were installed to better refine the model
and gain a better understanding of flow paths to the west of the AAB upstream dam.
Groundwater vector maps generated from the flow and transport model are
presented as Figures 5-8a/b/c and 5-9a/b/c in the CAP Update.
During the 8-22-2018 meeting with NCDEQ, it was agreed that MW-40S/BRU was
downgradient of the GWA-31 location and was sufficient to determine groundwater
flow and concentrations in this area. Monitoring wells AB-9S/D/BR were installed
northwest of the AB-4 well cluster to refine the groundwater flow direction in this
area. Additional monitoring wells GWA-57S/BRU/BR, GWA-58S/BRU/BR, and
GWA-59S/D/BR were installed northwest and northeast of GWA-39S. The
groundwater elevations from these wells were used to refine the groundwater
elevation contours. The updated groundwater flow maps using the data from the
newly installed monitoring wells gauged in April 2019 are presented as Figures 5-
4a/b/c and 5-5a/b/c in the CAP Update.
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NCDEQ Formal Comment 9 — Sub -bullet 2
o interpretation is incomplete or inaccurate (e.g. potentiometric contours in figs. 6-15 to 6-
21 near the active basin dam at Suck Creek suggest partial underflow rather than
discharge to the creek from both sides as described in the conceptual model
Response to NCDEQ Formal Comment 9 — Sub -bullet 2
Monitoring wells GWA-57S/BRU/BR and GWA-58S/BRU/BR were installed to assist
with the interpretation of groundwater flow direction in the vicinity of the AAB
upstream dam. Updated water level maps using these wells are presented as
Figures 5-4a/b/c in the CAP Update. The groundwater elevations from these
monitoring wells in conjunction with surface water elevations surveyed
concurrently with the water level gauging event have been used to address any
inaccuracies or incomplete interpretations of the groundwater flow direction in this
area. The conceptual site model in the CAP Update has been revised to reflect the
updated understanding of groundwater flow in this area of the site.
The flow and transport model has refined the understanding of groundwater flow
direction in this area. Deep dam wells were installed to better refine the model and
gain a better understanding of flow paths to the west of the AAB upstream dam.
Groundwater vector maps are presented as Figures 5-8a/b/c and 5-9a/b/c in the CAP
Update.
Groundwater appears to be flowing under Suck Creek in the vicinity of the AAB
upstream dam. The discussion of potential Suck Creek underflow is presented in
Section 5 of the CAP Update.
NCDEQ Formal Comment 9 — Sub -bullet 3
o there is a general lack of specificity and discussion at a local scale (e.g. the location of a
groundwater divide in the south west portion of the active basin (north-northwest of AB-
4) was not discussed or mapped even though it is the area where contaminated
groundwater breaks and flows in one of three directions)
Response to NCDEQ Formal Comment 9 — Sub -bullet 3
Monitoring wells AB-8S/I/BRU/BR, AB-7S/BRU/BR and AB-9S/D/BR were installed
northwest of well cluster AB-4 within the footprint of the AAB (Figure 1-2) to help
understand the groundwater flow directions in this area of the basin. The water
elevations measured in these wells have been used to refine the groundwater level
maps (Figures 5-4a/b/c) and specifically the groundwater directions presented in this
portion of the site. Based on the updated groundwater level maps, shallow
groundwater flows out radially from the ash stockpile located in the AAB.
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Groundwater generally flows to the north, northwest, and southwest from the
stockpile. The groundwater on the north side of the stockpile flows north to the Broad
River, with a portion of the water flowing to the northwest toward Suck Creek.
Groundwater on the northwest side of the stockpile flows northwest, through the AAB
upstream dam to Suck Creek. Groundwater on the west side of the stockpile flows
generally southwest to Suck Creek. Groundwater to the east of the stockpile flows
generally northeast to the Broad River.
The flow and transport model has also refined the understanding of groundwater flow
direction in the central portion of the AAB and across the site. Groundwater flow
vectors for pre -decanting site conditions are presented as Figures 5-8a and 5-9a in the
CAP Update.
NCDEQ Formal Comment 9 — Sub -bullet 4
o important data were not collected (e.g. water levels in Suck Creek were not measured so
the potentiometric maps were created without this information)
Response to NCDEQ Formal Comment 9 — Sub -bullet 4
The water level maps provided in the CAP (Figures 5-4a/b/c and Figures 5-5a/b/c)
present groundwater elevations gauged on April 22, 2019. Sixteen elevations of
various surface water features including Suck Creek were surveyed on April 22,
2019 and their elevations are also shown on the water level maps. The groundwater
flow directions presented on these figures were interpreted from the gauged
groundwater elevations and surveyed surface water elevations.
NCDEQ Formal Comment 9 — Sub -bullet 5
o critical information was not depicted on the potentiometric maps themselves (e.g.
topographic contours need to be superimposed on potentiometric maps to help in
evaluating the reliability of the mapped potentiometric contours).
Response to NCDEQ Formal Comment 9 — Sub -bullet 5
The water level and potentiometric maps provided in the CAP Update (Figures 5-
4a/b/c and 5-5a/b/c have 2-foot topographic contours superimposed on them.
NCDEQ Formal Comment 10 (page 4 of 6)
In various instances the report purports to understand the cause of contamination when it does
not. For an example, see page 14-7, where it is states, without substantiation, that cobalt
contamination in bedrock groundwater "is due to natural geochemical conditions". While this
may or may not be true, the report implies knowledge that it does not have or does not provide.
This practice is not acceptable.
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Response to NCDEQ Formal Comment 10
Background values were calculated in accordance with the Revised Statistical Methods
for Developing Reference Background Concentrations for Groundwater and Soil at Coal Ash
Facilities (HDR and SynTerra 2017). The updated background datasets for each flow
system used to statistically assess naturally occurring concentrations of inorganic
constituents in groundwater are presented in the report Updated Background
Threshold Values for Constituent Concentrations in Groundwater (SynTerra, 2019d)
provided to NCDEQ on June 13, 2019. The updated background dataset for each
hydrogeologic flow zone consists of an aggregate of total (non -filtered)
concentration data pooled across background monitoring wells installed within that
flow zone. The background datasets contained more than the required minimum of
10 valid sample data (CAP Update Appendix C, Table 1).
A'COI management process' was developed to gain understanding of the
groundwater data distribution and to select the appropriate remedial approach
presented in the CAP Update. The COI management process considers:
1. A constituent's source concentration,
2. Is the data distribution consistent with flow and transport mechanisms,
3. Would the COI be expected to exhibit mobility under current or predicted
future geochemical conditions.
The management process uses a matrix evaluation (Table 6-6, 6-21, and 6-32).
The COI management process and matrix evaluation were used in the CAP Update
to determine if constituents greater than their comparison criteria (02L
standard/IMAC or background value, whichever is greater) were naturally
occurring (due to natural geochemical conditions) or the result of impacts from the
ash basins.
NCDEQ Formal Comment 11 (page 4 of 6)
The report states, for each source area, that "The well screens in the CAMA wells accurately
monitor groundwater conditions" (e.g. see page 11-7). However, no evidence, analysis, or basis
is provided for this broad statement. It is widely understood that concentrations can increase or
decrease sharply over short vertical distances, particularly in a heterogeneous subsurface like at
Cliffside. The values measured (particularly in deep and bedrock wells) are a function of the
location of the well (relative to the source) and the specific vertical interval over which the well is
screened. A well installed to properly understand groundwater contamination and its movement
is screened across the heart of the contaminated plume, and the screen depth and length are
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Cliffside Steam Station SynTerra
chosen to account for heterogeneities (preferential flow paths) in the subsurface that could
concentrate constituents in one vertical horizon over that of another. Only a careful, intentional
analysis of the data (e.g. contaminant concentrations versus local flow unit thicknesses versus
screen length and depth versus proximity to source) will answer the question "are wells
constructed to accurately measure maximum concentrations in a given flow unit in a particular
area?"
Response to NCDEQ Formal Comment 11
The monitoring wells were installed at the depths to monitoring groundwater in
each of the flow layers (shallow, deep, and bedrock) on the site. A consideration
during well installation was to install well screens in the most permeable material to
ensure that the wells are in the zone of the highest hydraulic conductivity (transition
zone). These zones with the highest hydraulic conductivity are the zones with the
highest likelihood of enhanced mass flux.
NCDEQ Formal Comment 12 (page 4 of 6)
Need all future reports associated with coal combustion residual (CCR) assessment, closure, and
(or) corrective action to be separated and organized by source area, and all data, maps, tables,
analysis, and interpretations pertinent to that source area to be discussed together and with
specificity as one narrative. As written, information from multiple source areas is intermixed in
sections, paragraphs, and sentences across the report (e.g. pages 2-1, 2-11, 3-8, 3-9, 6-8, 6-9, 6-
14, 7-7, 8-1, 9-2, 9-6, 10-20, 12-1, 12-4, 14-3, 14-19), and the reviewer is left to tease out and
reassemble the information to gain an understanding of conditions for a particular source area.
Response to NCDEQ Formal Comment 12
This CAP Update report has been separated and organized by source area and
interpretations pertinent to that source area discussed together. The three source
areas and associated report sections in the CAP Update are:
• Active ash basin (AAB) and ash storage area (ASA) — Section 6.1 through 6.9
• Former Units 1-4 ash basin (U1-4 AB) — Section 6.10 through 6.18
• Unit 5 inactive ash basin (U5 AB) — Section 6.19 through 6.27
OTHER PRIMARY AND SECONDARY SOURCES
NCDEQ Formal Comment 13 (page 5 of 6)
For each source area need map of soil above Protection of Groundwater (POG). Need discussion
of how and why soil contamination occurs outside waste boundary.
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Response to NCDEQ Formal Comment 13
A soil sample location map and locations where soil results are greater than POGs or
BTVs (whichever is greater) is presented in the CAP Update for the AAB (Figure 6-
7), the U14 AB (Figure 6-42), and the U5 AB (Figure 6-68). Results of the soil
samples are presented on Table 6-3 (AAB), Table 6-19 (U1-4 AB), and Table 6-29
(U5 AB). Discussion of the soil sample results associated with each source area
including how and why soil contamination occurs outside the waste boundaries is
provided for the AAB and ASA (Section 6.1.4.1), the U14 AB (Section 6.10.4.1) and
the U5 AB (Section 6.19.4.1) in the CAP Update.
NCDEQ Formal Comment 14
Need discussion describing whether additional sediment assessment is needed near locations
with sediment contaminant concentrations above the POG. Need discussion describing proposed
sediment sample locations in specific groundwater discharge areas along the Broad River.
Response to NCDEQ Formal Comment 14
A summary of background sediment sample analytical results are provided in Table
4-5, and analytical results for sediment samples are provided in Appendix C, Table
5 in the CAP Update. Background sediment concentrations are discussed in Section
4.4 of the CAP Update and the sediment sample locations are show in Figure 4-1.
The extent of COIs reported in onsite sediment are discussed in Sections 6.1.2,
6.10.2, and 6.19.2 of the CAP Update.
Additional sediment samples have been collected since the CSA Update was
submitted. Sediment samples SED-1 through SED-16 were collected on April 20,
2018. The location of these sediment samples are shown on Figure 1-2. The
additional sediment samples were collected in the locations of the surface water
samples that were collected as part of the 02B current conditions evaluation in 2017.
The updated risk assessment (Appendix E) incorporates results from surface water,
sediments, and groundwater samples collected March 2015 through June 2019. The
updated risk assessment did not result in an increase of risks to on -Site exposure
scenarios or ecological receptors (mallard duck, great blue heron, muskrat, river
otter) exposed to surface water and sediments associated with the source areas at
CSS. Therefore, any reported sediment results reported at concentrations greater
than the PSRG POG are not causing increases in risk to human or ecological
receptors.
NCDEQ Formal Comment 15
Need assessment of raw coal piles.
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Response to NCDEQ Formal Comment 15
Based on the April 5, 2019 letter from Sheila Holman, NCDEQ Assistant Secretary
for Environment, to Paul Draovitch, Duke Energy Senior Vice President (Appendix
A), a comprehensive site assessment (CSA) for the raw coal piles north of Unit 6 at
CSS will be performed and is due to DEQ on March 31, 2020.
A soil and groundwater assessment technical memorandum for the coal pile
assessment (workplan) was submitted to NCDEQ on June 29, 2018. The NCDEQ
approved the coal pile assessment workplan in a letter from Jon Risgaard, NCDEQ
Animal Feeding Operations and Groundwater Section Chief, to Paul Draovitch,
Duke Energy Senior Vice President, dated July 31, 2018.
Assessment activities associated with the coal pile are ongoing and include the
installation and sampling of monitoring wells and soil sampling in general
accordance with the approved workplan. The CSA for the coal pile will be
submitted to NCDEQ by March 31, 2020.
NCDEQ Formal Comment 16
Need assessment of newly identified source area near unit 6.
Response to NCDEQ Formal Comment 16
Based on the April 5, 2019 letter from Sheila Holman, NCDEQ Assistant Secretary
for Environment, to Paul Draovitch, Duke Energy Senior Vice President (Appendix
A), a comprehensive site assessment (CSA) for the area of groundwater exceedances
near Unit 6 at CSS will be performed and is due to DEQ on March 31, 2020.
Groundwater monitoring wells GWA-60BRU/BR, GWA-61BRU/BR, and GWA-
62BRU/BR (Figure 1-2) were installed and sampled and soil samples collected from
the monitoring well borings to assess the newly identified source area near Unit 6.
This data will be used in conjunction with existing site data and information as part
of the Unit 6 source area assessment.
MAPS, FIGURES, AND TABLES
NCDEQ Formal Comment 17 (page 5 of 6)
Some figures, tables, or text are incomplete, in error, not current, or not used/referenced in the
report. Specific examples to be provided under separate cover. Maps, figures, and tables need to
use reporting limits instead of ND (non -detect).
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Response to NCDEQ Formal Comment 17
The figures, tables, and text presented in the CAP Update are complete, current, and
referenced in the report. The adjusted reporting limits are used instead of non -
detect (ND) on maps, figures, and tables presented in the CAP Update.
MODELING
NCDEQ Formal Comment 18 (page 5 of 6)
Geochemical controls on groundwater contaminants were not defined in the report. It was agreed
that this information and all associated documentation and modeling will be presented, for each
individual source area, as part of or prior to the CAP submittal. Modeling direction provided by
the Division and provided in the CAP content letter from S. Jay Zimmerman to Paul Draovitch,
April 27, 2018 needs to be incorporated into the modeling report. All additional direction
provided by Bill Deutsch (geochemical consultant) needs to also be incorporated into the
modeling report.
Response to NCDEQ Formal Comment 18
The geochemical modeling team has held multiple discussions with NCDEQ
representatives and Mr. Bill Deutsch and has updated the geochemical modeling
framework as needed based on these discussions. A detailed description of the
geochemical modeling approach and resulting simulations and analyses are
provided in Appendix H.
NCDEQ Formal Comment 19 (page 5 of 6)
The CSA did not provide predicted contaminant concentrations at specific locations. It was
agreed that this information and all associated documentation and modeling will be presented,
for each individual source area, as part of or prior to the CAP submittal. Modeling direction
provided by the Division and provided in the CAP content letter from S. Jay Zimmerman to
Paul Draovitch, April 27, 2018 needs to be incorporated into the modeling report.
Response to NCDEQ Formal Comment 19
The CAP Update provides predicted concentrations of constituents of interest for
non -reactive, (i.e. boron and sufate) using the flow and transport model (Appendix
G). The geochemical model is used to model reactive COIs along selected cross -
sections (CAP Update Appendix H).
These results are presented for each individual source area. The DEQ guidance,
including the Bill Deutsch direction, is also incorporated into the modeling effort
presented in the CAP Update.
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Cliffside Steam Station SynTerra
RISK
NCDEQ Formal Comment 20 (page 5 of 6)
While the Division is receptive to the argument that CCR impacts to area supply wells are
unlikely, the rationale and evidence used to substantiate this is inadequate. The report states
generically that several factors may affect the concentrations observed in supply wells, including
well construction, geochemistry, and flow direction, but few details were not provided. For any
supply well with a constituent above 2LIIMACIBTV, need discussion that considers multiple
lines of evidence that substantiates the Duke position. These should include:
o whether alternative water has been supplied to the well owner;
o whether the well has been abandoned;
o boron levels in the supply well;
o constituent concentrations above 2LIIMACIBTVs,
o the water type in the supply well and how it relates to background bedrock conditions
(show Piper diagram of all supply wells and all bedrock wells upgradient of source,
within source, and downgradient of source;
o topography, assumed hydrologic divides such as the Broad River, and groundwater flow
directions in the area between the source area and the supply well(s) in question;
o actual geochemical conditions (well IDs and data) within the supply well that are
believed to be influencing the observed exceedance,
o mapped particle tracks from numerical modeling; and
o any other relevant factor(s).
The amount of documentation expected for a given supply well or group of supply wells is
dependent upon the constituents and concentrations in the well and its proximity to the ash
basins.
Response to NCDEQ Formal Comment 27
An additional evaluation of the private water supply well data near CSS is
presented in Sections 6.2.2 (AAB and ASA), 6.11.2 (U1-4 AB), and 6.20.2 (U5 AB) of
the CAP Update. A water supply well sampling results summary of exceedances is
provided in CAP Update Table 6-9. The amount of documentation provided per
water supply well or group of wells varies based on the constituents and
concentrations in the well and proximity to the ash basins. The findings of the water
supply well evaluation found that no private drinking water wells are impacted by
COIs attributable to the CSS ash basins or ASA.
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SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS••
DEQ Comment 1.
Section 1.5.1
This comment is acknowledged.
The ash storage area is made up of two
Appendix C, Table 3
smaller areas known as the western storage
There are two main aspects of the comment
area (-6 acres) and the eastern storage
which are addressed below.
area (-5 acres). The western area is the
area of concern as it contains CCR material
Impacted groundwater has been identified in
and is associated with contaminated GW
the ash storage area (ASA) (formerly
flowing northward and discharging to the
referred to as the western ash storage area)
Broad River receptor. The eastern area
beyond the active ash basin (AAB)
appears to contain only benign native fill
Section 6.9
compliance boundary located within the
material based on the available record and
central portion of the ASA. An active
GW quality results and appears to be of no
remediation system is proposed in to
further concern. This point is only inferred
remediate the groundwater beyond the AAB
in the CSA and needs to be stated directly
Appendix J
compliance boundary within the ASA
for purposes of CAP design.
consisting of 23 groundwater extraction
wells, 46 clean water infiltration wells, and
one horizontal clean water infiltration well.
With respect to groundwater discharge to
the Broad River, a surface water mixing
model evaluation in the Broad River
indicates that predicted resultant constituent
concentrations in applicable surface waters
are less than 02B surface water standards
(see Appendix 3 for details).
Duke Energy concurs with the NCDEQ
comment regarding the "eastern area". A
spoil area for soil, that was previously
thought to also be an ash storage area, is
Figure 1-2
located to the east of the ASA and may
contain soil from the AAB embankment dam
construction. Borings were advanced at the
AS-4, AS-5, and AS-6 locations in this area
(Figure 1-2 and confirmed that ash is not
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Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS••
present in this area; therefore, the spoil area
is not considered a source area. Please see
soil boring logs for the AS-4, AS-5, and AS-6
monitoring well installations provided in the
2018 CSA Update for details.
DEQ Comment 2.
Figure 1-2 (and all figures in the CAP
This comment is acknowledged.
The determinations of 2L/IMAC GW
Update)
contamination in need of restoration, as
The compliance boundaries at the AAB, U1-
presented in the CSA, are based on an
4AB, and U5 AB have been revised since the
incorrect compliance boundary drawn too far
2018 CSA Update and reflect Duke Energy's
to the north. The compliance boundary in
understanding of the appropriate compliance
fig. 2-10 is incorrect. The map provided as
boundaries. The revised compliance
fig. 1, dated 317118, (see attachment)
boundaries are presented in the CAP Update.
shows the correct compliance boundary.
Source area impacts beyond the compliance
Only wells AS-1S8/D, CCR-7S/D, and CLMW-
boundaries are addressed in the CAP
1 in the central and (or) southern portion of
Update.
the storage area (fig. 2-10) are within the
compliance boundary and therefore exempt
As noted in the response to DEQ Comment
from 02L exceedances. All other wells are
1, an active remediation system is proposed
outside the compliance boundary and, if
in the ASA in the CAP Update consisting of
contaminated, represent GW that must be
23 groundwater extraction wells, 46 clean
restored to 2L/IMAC standards. AS-7S is an
water infiltration wells, and one horizontal
exception since it is a pore water well.
clean water infiltration well. The
remediation system is designed to capture
groundwater in the vicinity of monitoring
well clusters AS-2 and AS-8.
With regards to the specific exceedances at
Appendix C, Table 1
specific well locations identified in the
footnote:
A COI management process was developed
by Duke Energy at the request of NCDEQ to
gain understanding of the COI behavior and
distribution in groundwater and to aid in
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CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • . • COMMENT
COMMENTS. RESPONSES
selection of the appropriate remedial
approach. This COI management process is
supported by multiple lines of technical
evidence including empirical data collected
at the site, geochemical modeling, and
groundwater flow and transport modeling.
This approach has been used to understand
and predict COI behavior in the subsurface
related to the ash basins and ASA, or to
identify COIs that are naturally occurring.
COIs that have migrated at or beyond the
compliance boundary at concentrations
greater than 02L, IMAC and background
values that are related to an ash basin would
be subject to corrective action. COIs that
are naturally occurring at concentrations
greater than the 02L standard do not require
corrective action. The updated identified
COIs and horizontal and vertical extent of
distribution in groundwater identified for
corrective action are described in detail in
the CAP Update report.
DEQ Comment 3.
Figure 2-1
This comment is acknowledged.
Contaminated GW in need of restoration
exists in the shallow, deep, and BR flow
Section 6.1.3
A COI management process was developed
units on or beyond the compliance
by Duke Energy at the request of NCDEQ to
boundary'. It is unknown whether BR
gain understanding of the COI behavior and
1 Shallow GW exceedances outside the CB and in need of restoration at the western ash storage area include B, SO4, TDS, Co, Mn, Se, TI, Sr. The farthest
downgradient shallow well just west of the toe (AS-2S) contains exceedances of B, SO4, TDS, Co, Mn, Se, TI, Sr, and the farthest downgradient shallow well in
the central portion (AS-8S) contains GW exceedances of Fe, Mn, Sr.
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CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • . • COMMENT
COMMENTS. RESPONSES
contamination needs restoration east of AS-
distribution in groundwater and to aid in
2BR because the only BR wells available in
selection of the appropriate remedial
the central portion of the site contain high
approach. This COI management process is
pH (AS-7BRU/BR) which resulted in
supported by multiple lines of technical
contaminant data that was "invalid': An
evidence including empirical data collected
additional BR well is needed near AS-8 or
at the site, geochemical modeling, and
CLP-1 to define the lateral extent of
groundwater flow and transport modeling.
restoration that will be needed.
This approach has been used to understand
and predict COI behavior in the subsurface
related to the ash basins and ASA, or to
identify COIs that are naturally occurring.
COIs that have migrated at or beyond the
compliance boundary at concentrations
greater than 02L, IMAC and background
values that are related to an ash basin would
be subject to corrective action. COIs that
are naturally occurring at concentrations
greater than the 02L standard do not require
corrective action. The updated identified
COIs and horizontal and vertical extent of
distribution in groundwater identified for
corrective action are described in detail in
the CAP Update report.
Groundwater exceedances in need of
restoration at or beyond the compliance
Deep GW exceedances outside the CB and in need of restoration include B, Cr, Fe, Mn, Sr. The farthest downgradient deep well just west of the toe in AS-2D,
contains GW exceedances of Mn, Sr, and the farthest downgradient deep well in the central portion (AS-8D) contains GW exceedances of B, Fe, Mn, Sr.
BR GW exceedances outside the CB and in need of restoration include: Mn, Sr, Co, V. The farthest downgradient shallow well just west of the toe (AS-26R)
contains BR GW exceedances of Mn and Sr. The farthest downgradient BR well in the central portion contains GW of unknown CCR contamination due to high
pH in AS-713RU and AS-76R and no BR well at AS-8.
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boundaries are addressed as described in
the CAP Update report.
With regard to understanding groundwater
conditions in BR the specific area discussed
in the footnote: A replacement bedrock
monitoring well was installed at the AS-7
cluster (AS-7BRB). This monitoring well has
pH reported within the acceptable range for
usable data. pH readings have been
reported at 7.8 and 7.3 S.U. during the
March and June, 2019 sampling events. A
bedrock monitoring well was installed at the
AS-8 cluster (AS-813R). The analytical
results in these monitoring wells in
conjunction with the COI management
process have been used to determine the
horizontal and vertical extent of COIs in
need of restoration in this portion of the site.
DEQ Comment 4.
Section 6.1.2
This comment is acknowledged.
GW contamination in the eastern half of the
western storage area was not defined. The
Exceedances in the eastern half of the ash
report recommends only one additional well
storage area (ASA) (formerly referred to as
location for the western ash storage area,
the western ash storage area) are delineated
well AS-7 (45 to 55 ft b/s) but does not
by use the existing monitoring wells and the
explain why. The report does not explain
additional monitoring wells installed in this
why CLP-1 was not measured for WLs or
area.
sampled for GW quality. Well CLP-1 needs
to be sampled to determine the lateral
Additional wells AS-813R, AS-9D, AS-913R,
extent of contamination in need of
and AS-7I were installed in the area near
restoration in the NE portion of the western
AS-7. The data from these wells was used to
storage area.
determine the horizontal and vertical extent
of COIs in this area.
Monitoring well AS-8BR was installed at the
AS-8 cluster and monitoringwells AS-9D
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and AS-9BR were installed near CLP-1.
These additional well locations are in the
eastern half of the ash storage area.
AS-7I was installed in the residuum beneath
the ash and above PWR at this well cluster
to provide data to assist with the
geochemical model per the request of the
modelers.
CLP-1 was installed by Duke prior to the CSA
effort and was constructed as a piezometer
to gauge water levels and was not intended
to be sampled for chemical analysis. Per
discussions with NCDEQ and the 2018
interim monitoring plan, CLP-1 was sampled
and analyzed in January, 2019 and also
gauged for water levels during the April
2019 gauging event. The water level from
CLP-1 was used to draw the groundwater
contours presented in the CAP Update
DEQ Comment S.
Figures ES-3a, 5-4a, 5-4b, and 5-4c
This comment is acknowledged.
The conceptual model of GW flow directions
from the western storage area is
Section 5.1.2
The water level figures have been updated
inconsistent across various sections of the
using the April 2019 groundwater and
CSA. For example, page 15-10 states that
surface water levels gauged across the site.
the "western part of the ash storage area
These figures also incorporated data from
discharges to Suck Creek', but other report
the additional wells installed since the CSA
sections and the potentiometric maps in figs.
Update was submitted and refine the
6-16 to 6-20 suggest instead that GW
Appendix J
groundwater flow in this area.
moves northward and discharges directly to
the Broad River. The CSA needs to be
Based on the shallow groundwater contours,
accurate and consistent on this point.
the southwestern portion of the ASA flow to
the northwest toward Suck Creek. The
central and northern portions of the ASA
flow to the north to the Broad River. Based
on the deep and bedrock groundwater
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contours, the generalized flow from the ASA
is to the north to the Broad River. (Figures
5-4a, 5-4b, and 5-4c)
As noted in the CAP Update, the area of the
ASA is included in the area proposed for
corrective action, noted as Area 1 on Figure
ES-3a, with groundwater in this region.
The CAP plan will address the COIs requiring
restoration to groundwater standards.
Appendix 3 of the CAP Update evaluates
the potential impact of groundwater
discharging to surface water.
The Surface Water Future Conditions
Evaluation to Assess 15A NCAC 02L .0106
(k) and (1) Report (May 2019) confirms that
current and predicted resultant constituent
concentrations in applicable surface waters
are less than 02B surface water standards.
DEQ Comment 6.
Appendix B, Figure 1
This comment is acknowledged.
The CSA did not fully define the waste and
waste footprint for the western storage area.
The referenced waste footprint and volumes
Ash was encountered at only two borings
were obtained from AECOM reports "Rogers
within the waste boundary, only one of
Energy Complex - Cliffside Steam Station
which was saturated. Soil was sampled
Active Ash Basin - Closure Options Analysis -
beneath ash in only two locations (one depth
Summary Report (2019)" and "Rogers
each). The CSA stated uncertainly that "this
Energy Complex - Cliffside Steam Station
[western] storage area was probably created
Unit 5 Inactive Ash Basin - Closure Options
when ash was removed from the active ash
Analysis - Summary Report (2019)".
basin in the 1980s....', and that "the eastern
portion of the ash storage area may be a
The description of waste material and the
spoils area remnant of soil from
history of placement are described in the
embankment dam construction' However,
CAP Update. The source footprint (ash and
Duke has provided great detail on this area
Lsaturated ash) presented in the CAP U date
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in letter correspondence to the Division
and in the isopach figures submitted to
(7122116; 1216116), in internal memos
NCDEQ were developed by data collected for
(1219115), and in engineering drawings
development of the closure plan. This
(311173; 1013116). In addition, the report
information was developed by use of
states that "the combined ash storage area
historical maps, site drawings, geotechnical
footprint... reportedly contains approximately
borings performed for closure plan
170,000 cubic yards of ash material" The
development. This information provides
report provides no reference or basis for this
detailed depictions of the extent and
estimate which appears to have been
thickness of ash at the site.
computed from the interpolated cross
sections I -I' (fig. 6-10) and J-J' (6-11). The
description provided in the CSA is
inadequate. The CSA needs to reference
and discuss historic engineering drawings,
aerial photographs, and topographic maps to
help define the footprint of the impacted
area. The report needs to reference the
data used to estimate the waste volume.
DEQ Comment 7.
Figures 5-4a, 5-4b, 5-4c
This comment is acknowledged.
The description of contaminated GW was
focused mostly on simply summarizing the
Appendix I
The CAP presents a comprehensive
mapped and tabled data. Very little
understanding of the results of the
interpretation was provided to explain the
investigations performed at the site,
source of or reason for the observed
including the elements required by 02L
concentrations in different areas within and
.0106. The CAP Update also identifies the
surrounding the ash storage area, whether
sources at the site, including the ASA, and
of ash, pore water, or upgradient or
Section 6.1.2
contains sufficient interpretation of the site
overlying contaminated units. A map was
data to develop a corrective action plan.
provided showing the upward or downward
trend of boron in most wells across the
Updated trend analyses were performed on
facility but this map was not actually used in
groundwater data from wells in the ASA.
any meaningful way in discussions about
These results are discussed in CAP Update.
local contaminant distribution and
The CAP Update and supporting Appendices,
movement. No contaminant cross sections
presents discussions and data by individual
were mapped through the source area. Pore
source area. The MNA report, Appendix I,
water was not used to explain the
Figures 6-9a, 6-9b, and 6-9c
includes updated trend analyses, including
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downgradient concentrations and movement
statistical trend analyses of concentrations
of contamination.
along pertinent cross sections along with
discussions of COI behavior.
There is a groundwater flow path from the
active ash basin through the ASA. This is
depicted on the updated groundwater level
maps (Figures 5-4a, 5-4b, 5-4c)
presented in the CAP Update.
Based on an evaluation of data in the CSA
and data collected subsequent to the CSA,
the source of the observed concentrations
and the exceedances of comparison criteria
at or beyond the compliance boundary in the
ASA and in the region adjacent to the ASA is
a result of combined impacts from the both
active ash basin porewater and the
porewater concentrations from ash in in the
ASA.
Groundwater flow, and the associated
movement of COIs, in this region is
generally along a pathway depicted by cross
section J-Y, which is oriented south to north
through the ASA. Figures 6-9a, 6-9b, and
6-9c of the CAP Update provide a depiction
of COI concentrations along section J-J.
Boron concentrations in this area are
generally consistent from CLMW-1 to AS-1,
to AS-7, and downgradient to AS-2. The
COIs are generally reported in the shallow
and deep flow layers through the ASA.
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The CAP Update corrective action approach
for source areas contains a section for each
source area titled Saturated Ash and
Groundwater. This section describes the
COI management approach for that source
area and identifies specific COIs that have
migrated from that source area and
describes, along with other items, the waste
and the extent of constituent distribution at
the source area.
Also presented in that section is the
technical memorandum, titled Saturated Ash
Thickness and Underlying Groundwater
Boron Concentrations - Allen, Belews Creek,
Cliffside, Marshall, Mayo, and Roxboro Sites,
conducted linear regression analyses to
evaluate the relationships between saturated
ash thickness and concentrations of boron in
ash pore water and underlying groundwater.
The linear regression analysis was conducted
using analytical data from Piedmont ash
basins, including data from Cliffside.
DEQ Comment S.
Appendix C, Table 1
This comment is acknowledged.
Well data needed to understand and map
Figures 6-17 through 6-28
the GW contamination in need of restoration
Analytical results from AS-8S/D, GWA-
were limited or not available at the time of
54S/D/BRO, and AS-7I/BRB are included in
report submittal (e.g. AS-8S/D and GWA-
the CAP Update and used to map COIs in
54S/D/BRO). And only one pore water well
and adjacent to the ASA. These wells were
was insta/led (AS-7S). Pore water
installed after the submittal of the 2018 CSA
contributing contamination to the underlying
Update. Data through June 2019 are
GW system generally was not discussed.
presented in the CAP Update.
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Porewater wells in the ASA include AS-7S
and AS-8S.
Boron concentrations in this area are
generally consistent from CLMW-1 to AS-1,
to AS-7, and downgradient to AS-2. The
COIs are generally reported in the shallow
and deep flow layers through the ASA.
As stated in the response to the previous
comment, the exceedances of comparison
criteria at or beyond the compliance
boundary in the ash storage area in the
region of the ASA is a result of combined
impacts from the both active ash basin pore
water and the pore water concentrations
from ash in in the ASA.
The CAP Update provides a plan for
restoration of groundwater in this area.
The potential for pore water to contribute to
the underlying groundwater system is
discussed for each source area in the CAP
Update in the section titled Saturated Ash
and Groundwater.
DEQ Comment 9.
Figure 1-2
This comment is acknowledged.
The report suggested in passing that a
portion of the contaminated GW from the
Figures 5-4a, 5-4b, 5-4c
Additional monitoring wells installed since
active basin to the SE migrates through the
the submittal of the CSA Update have
ash storage area before it discharges to the
Figures 5-8a and 5-9a
provided refinement to groundwater flow
Broad River receptor, but few details were
and associated COI movement in this region.
provided. For example, the report did not
provide a discussion of the GW divide where,
Monitoring wells AB-8S/I/BRU/BR, AB -
depending on the location, GW will move
7S/BRU/BR and AB-9S/D/BR were installed
either toward the Suck Creek dam the
northwest of well cluster AB-4 within the
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western ash storage area, or the northern
footprint of the AAB. Data from these wells
dam at the Broad River. WL maps show
were used to determine the location of the
very widely spaced contours in this area so
groundwater divide in this area and water
the inferred GW flow directions are
elevations measured in these wells have
generalized and not specific here. To
been used to refine the groundwater level
support CAP design, the CSA needs to map
maps and specifically the groundwater
GW flow directions near the GW divide and
directions presented in this portion of the
describe in detail contaminant
site. Based on the updated groundwater
concentrations entering the site from the SE.
level maps (Figures 5-4a, 5-4b, 5-4c),
shallow groundwater flows out radially from
the ash stockpile located in the AAB. Deep
and bedrock groundwater flow directions are
to the north and northwest from this area,
with less of a defined groundwater divide
compared to the shallow flow layer.
Groundwater generally flows to the north,
northwest, and southwest from the ash
stockpile. The groundwater on the north
side of the stockpile flows north to the Broad
River, with a portion of the water flowing to
the northwest toward Suck Creek.
Groundwater on the northwest side of the
stockpile flows northwest, through the AAB
upstream dam to Suck Creek. Groundwater
on the west side of the stockpile flows
generally southwest to Suck Creek.
Groundwater to the east of the ash stockpile
flows generally northeast to the Broad River.
The flow and transport model has also
refined the understanding of groundwater
flow direction in the central portion of the
AAB and across the site. Groundwater flow
vectors for current site conditions are
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presented as Figures 5-8a and 5-9a in the
CAP Update. These flow vectors are
consistent with the groundwater flow
direction figures created with gauged
groundwater and surface water elevations.
Responses to previous comments have
addressed the groundwater flow and COI
movement from the ash basin and ash
storage area to Suck Creek and the Broad
River. As described in those responses, the
potential impact to surface water from the
ash sources is addressed in CAP Update
Appendix J.
An active remediation system is proposed in
to remediate the groundwater beyond the
AAB compliance boundary within the ASA
consisting of 23 groundwater extraction
wells, 46 clean water infiltration wells, and
one horizontal clean water infiltration well.
DEQ Comment 10.
Figure 1-2
This comment is acknowledged.
The location of SW sample CLFSP059 located
north of the ash storage area was not
The location for surface water sample
mapped (fig. 2-10). This location contained
CLFSP-59 has been mapped and is shown on
Al (860) above the EPA criteria of 87 and
Figure 1-2 of the CAP Update. This sample
needs to be presented accordingly.
is in the same location also identified as
Remediation alternatives are limited in 02L
AOW S-25.
.0106 if contaminated GW causes
exceedances of SW standards, and the CSA
The Surface Water Future Conditions
needs to evaluate this possibility carefully.
Evaluation to Assess 15A NCAC 02L .0106
(k) and (1) Report (May 2019) confirms that
Appendix J
current and predicted resultant constituent
concentrations in applicable surface waters
are less than 02B surface water standards.
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The CAP Update provides an evaluation of
the potential impacts to surface water from
groundwater water discharges. This
evaluation found no current or predicted
exceedances of the 02B standards in the
Broad River or Suck Creek. Therefore, the
criteria for compliance with 02B is met,
allowing potential corrective action under
15A NCAC 02L .0106 (k) or (1).
Comparisons of surface water data with the
applicable USEPA National Recommended
Water Quality Criteria for Protection of
Aquatic Life, Human Health and/or Water
Supply (USEPA, 2015; 2018a; 2018b) was
conducted on surface water samples from
Appendix B, Table 9
the Broad River and Suck Creek. As stated
by the USEPA, these criteria are not a
regulation, nor do they impose a legally -
binding requirement. Therefore,
comparisons with these criteria are only for
situational context. The surface water
sample results compared to the EPA criteria
are discussed in the CAP Update report
(Appendix B Table 9).
DEQ Comment 11.
Section 6.1.3
This comment is acknowledged.
The CSA states that only Mn, Sr, and V are
being considered for MNA in the CAP for the
The COIs associated with the AAB and ASA
western storage area. The CSA needs to
have been refined in the CAP Update using
state how these and only these constituents
the COI Management Process described in
were selected for consideration.
Table 6-6
the CAP Update report. Section 6.1 of the
CAP Update lists the COIs for corrective
action in the AAB and ASA. These COIs are:
As, B, Co, Fe, Mn, Sr, 5O4, TDS, TI, U
(total), and V.
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CAP Update Section 6.1.3 describes the
process for evaluating if a COI is to be
retained for corrective action. Table 6-6
presents the COI Management Matrix for the
site COIs. This table presents the COIs
considered and the lines of evidence for
used in the evaluation process.
As a result of the evaluation performed in
the CAP Update, Groundwater Extraction and
Infiltration Wells, is the proposed
groundwater remedial alternative for the
AAB and the ASA.
DEQ Comment 12.
Appendix G
This comment is acknowledged.
An assessment is needed of the potential
impact on the leaching of saturated ash due
The flow and transport model is currently a
to river stage fluctuations and (or) GW level
steady state model using hydraulic head
fluctuations.
averages. For future evaluations, historical
water levels within ash basin monitoring
wells and monitoring wells adjacent to the
ash basins can be evaluated to determine
the maximum hydraulic head. Given that
heavy storms can result in pronounced
temporary groundwater level increases
(which are dependent upon the rain event,
local geology, topography, spatial extent and
geomorphic setting of any engineered cap,
and proximity to surface waters) which can
potentially reverse the local head gradients.
The flux of the river stage would have very
little impact on the hydraulic heads within
the ash basins at Cliffside and are mostly
affected by groundwater fluxes.
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RAW COAL PILES
DEQ Comment 1.
Section 3.0
This comment is acknowledged.
Coal pile impacts to groundwater were not
assessed in the report. The coal piles may
The initial assessment required by the CAMA
represent another source area whose GW
legislation was focused on ash basins and
must be restored. GW flow from the area of
did not contain requirements to assess coal
the coal piles is to the Broad River.
piles. As a result, groundwater monitoring
However, wells do not exist to determine
wells were not installed near the coal pile
where along the river contaminated GW
during CAMA associated fieldwork. Duke
discharge would occur. Based on
Energy understands the soils beneath the
topography and the pile locations, about 600
coal pile may be a potential "secondary
to 800 feet of river frontage potentially could
source" of inorganic constituents that will be
receive discharge. In addition, the CSA did
assessed apart from CAMA.
not discuss or map the infrastructure (e.g.
lined and bermed areas) designed to limit
A coal pile assessment workplan was
the movement of coal pile leachate.
submitted to NCDEQ on June 29, 2018 and
approved on July 31, 2018. The coal pile
assessment wells were installed in May and
June 2019. A coal pile assessment
addendum was submitted to NCDEQ in
November 2019. The installation of the
additional assessment wells associated with
the coal pile are targeted to be completed by
the end of 2019 pending NCDEQ approval of
the workplan addendum. The results of the
coal pile assessment soil and groundwater
sampling will be submitted to NCDEQ in a
CSS Coal Pile comprehensive site
assessment (CSA) report no later than
March 31, 2020 per correspondence from
DEQ dated April 5, 2019. Existing wells
GWA-10S/D and GWA-32D/BR are located
downgradient from the coal pile area and are
between the coal pile and the Broad River.
In addition, monitoring wells CP-6S/BR and
CP-5S/I/BR were installed north/northwest
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of GWA-14, between the coal pile and the
former Units 1-4 ash basin. Additional wells
IB-6S/D and IB-7S/D have also been
installed along the NE edge of the Former
Units 1-4 ash basin to monitor groundwater
quality discharging to the Broad River.
The appropriate evaluation of potential
impacts to surface water will be conducted if
the results from the coal pile assessment
wells indicate potential impacts to surface
water from impacted groundwater
discharging from the coal pile.
The TreeWell phytoremediation corrective
action proposed along the northeastern side
of the U1-4 basin has been designed to
target potentially impacted groundwater
discharging to the Broad River. Given the
coal pile location upgradient from the U1-4
AB, this remedial alternative would treat
water emanating from the U1-4 AB as well
as any impacted water from the coal pile
flowing beneath the U1-4 AB toward the
Broad River.
In addition to the results of the coal pile
assessment, the lined and bermed areas
designed to limit the movement of coal pile
leachate will be presented in the coal pile
CSA Report.
DEQ Comment 2.
Section 3.0
This comment is acknowledged.
Some GW from the easternmost coal piles
likely flows beneath units 1-4 inactive basin
Section 6.18
Monitoring wells CP-6S/BR and CP-5S/I/BR
and would add to the GW contamination in
were installed north/northwest of GWA-14,
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that area. While it is recognized that the
between the coal pile and the former Units
coal piles are being assessed on a different
1-4 ash basin. Additional wells IB-6S/D and
schedule, any GW contamination influences
IB-7S/D have also been installed along the
to units 1-4 basin needs to be documented
NE edge of the Former Units 1-4 ash basin
and accounted for as part of any proposed
to monitor groundwater quality discharging
corrective action for either source area. Any
to the Broad River.
CAP development needs to understand
where contaminated GW is moving and
The TreeWell phytoremediation corrective
discharging in this area. It is recommended
action proposed along the northeastern side
that at least one well nest be located about
of the U1-4 basin has been designed to
250 ft NW of GWA-14, between the coal pile
target potentially impacted groundwater
and the units 1-4 basin waste boundary.
discharging to the Broad River. Given the
Other shallow wells/piezometers need to be
coal pile location u efrom the U1-4
strategically located to determine quality
alternative would treat
AB, this remedial allterna
and areas of discharge to the river. These
water emanating from the U1-4 AB as well
wells should be quickly installed, sampled,
as any impacted water from the coal pile
and used in support of CAP development.
flowing beneath the U1-4 AB toward the
BASINUNIT 5 INACTIVE
Broad River.
DEQ Comment 1.
This comment is acknowledged.
The source footprint (i.e. ash and saturated
Section 6.19
ash) was not well defined in the CSA.
The description of waste material and the
Although this source area covers about 60
history of placement are described in the
acres, ash and pore water were observed in
CAP Update. The source footprint (ash and
only two locations soil was sampled beneath
saturated ash) presented in the CAP Update
ash in only one location. As -built drawings
and in the isopach figures submitted to DEQ
and historic topographic maps were not
was developed by data collected for
referenced or discussed. Ash location and
development of the closure plan. This
thickness were described in generic terms
Figures 8-2, 8-3, and 8-4
information was developed by use of
and without corroborating well boring
historical maps, site drawings, bathymetric
identifiers. Four geologic cross sections
surveys (where needed) and geotechnical
were provided but only two intercepted ash,
Figure 6-67
borings performed for closure plan
and extrapolations across very large
development. This information provides
distances were used to infer ash
detailed depictions of the extent and
configuration. For example, in geologic
thickness of ash at the site.
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cross section D-D, two locations with ash
were used to depict the configuration
The Unit 5 inactive ash basin isopach figure
(presence, depth, thickness, and saturated
depicts approximate ash thicknesses across
thickness) of ash across a 1400-ft span
the basin derived by comparison of
across the waste boundary. In cross section
elevations between the existing top of ash
E-E; zero locations with ash were used for
from the 2015 topographic and bathymetric
to depict the ash configuration across a 1000
surveys with pre -development topography
ft span of the waste boundary. In cross
Figure 1-2
based on historical USGS topography. The
section L-L, ash in one location was used to
Section 1.5.3
isopach figures were used to refine the ash
depict the ash configuration across a 1200 ft
thicknesses presented in cross -sections. A
span of waste boundary. And in cross
current conditions saturated ash thicknesses
section M-M, ash in one location was used
figure is presented as Figure 6-67.
to depict the ash configuration across a 700
ft span of waste boundary. All existing
All existing discharge piping and outfalls are
discharge piping and outfalls need to be
identified on Figure 1-2. The description of
clearly identified on maps and in text (leader
the outfall is presented in Section 1.5.3.
arrows in fig. 2-10 are unclear, and the map
text is not consistent with the report text).
DEQ Comment 2.
Section 6.19.1
This comment is acknowledged.
The description of contaminated GW was
focused mostly on simply summarizing the
Section 6.19.3
The CAP presents a comprehensive
mapped and tabled data. Very little
understanding of the results of the
interpretation was provided to explain the
investigations performed at the site,
source of or reason for the observed
including the elements required by 02L
concentrations in different areas within and
.0106. The CAP Update also identifies the
surrounding the unit 5 basin, whether of
sources at the site, including the Inactive
ash, pore water, or upgradient or overlying
Unit 5 Basin, and contains sufficient
contaminated units. A map was provided
interpretation of the site data to develop a
showing the upward or downward trend of
corrective action plan.
boron in most wells across the facility but
this map was not actually used in any
Table 3-1 of the CAP Update identifies coal
meaningful way in discussions about local
Figures 6-61a through 6-71c.
ash as the source material. The source
contaminant distribution and movement.
material within the U5 AB including the
Only one contaminant cross section L-L' was
history of the material and the chemistry of
mapped through the 58-acre source area.
the material is presented in Section 6.19.1.
Pore water was not used to explain the
A description of why low pH and associated
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downgradient concentrations and movement
COIs are observed in the vicinity of the U5
of contamination. The potentiometric
AB saddle dam are presented in Section
surface (fig. 6-16) west and east of the site
Figures 5-5a, 5-5b, 5-5c.
6.19.3.
is mostly inferred due to the lack of WL data
in these areas.
Updated trend analyses were performed on
groundwater data from wells in the U5 AB.
These results are discussed in CAP Update
report.
Three (3) cross -sections are mapped
through the U5 AB. Cross sections with COI
concentrations are presented as Figures 6-
69a through 6-71c.
Revised water level maps are presented as
Figures 5-5a, 5-5b, 5-5c. These maps
present a refined potentiometric surface
based on the additional wells installed in the
area.
The potential for pore water to contribute to
the underlying groundwater system is
discussed for each source area in the CAP
Update in the section titled Saturated Ash
and Groundwater. These sections also
contains discussions of the behavior, extent,
and movement of COIs.
DEQ Comment 3.
Appendix I
This comment is acknowledged.
Concentration -versus -distance plots used
wells that, in some cases, were
Updated concentration versus distance plots
inappropriate and resulted in misinterpreted
are presented in the MNA report (Appendix
findings. According to potentiometric maps
I). The wells used for geochemical flowpath
in figs. 6-16 S 6-18 D and 6-20 BR
modeling were generally those used in the
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COMMENTS. RESPONSES
the wells chosen for the plots in figs. 11-58
updated concentration versus distance plots
to 11-60 represent contamination emanating
in the MNA report. The updated
from different areas within the waste
concentration versus distance plots were
footprint, a footprint with wastewater
developed to evaluate plume stability and
concentrations that vary sharply in space.
attenuation and are presented by source
As a result, the plots did not represent
area and use wells located along the
plume evolution and attenuation
selected transects. Wells selected for use in
downgradient as implied on page 11-72. It
these plots were selected to represent flow
should be noted that the wells used for
and concentrations conditions along the
geochemical flowpath modeling were
particular transect. The transects used for
different than those used in the
these plots are the same transects used in
concentration -distance plots and were more
the geochemical modeling.
appropriate for concentration -distance
evaluations.
DEQ Comment 4.
Appendix H
This comment is acknowledged.
The CSA states (p. 11-30) that four wells
proposed for use in geochemical modeling
The description, justification and modeling
(GWA-2BR, U5-2S-SLA, U5-5BR, and U5-
approach for the CSS transects used in the
4BRA) have "zero valid sampling events" but
geochemical modeling report are presented
no further mention is made about the
in Table 2 in Appendix H (Geochemical
implications of this or about correcting this
Modeling Report). This includes a list of the
issue. The CSA needs to evaluate issues like
groundwater monitoring wells used for each
this and explain their significance.
geochemical transect. The flow path
through the U5 AB is one flow path through
shallow and deep flow zones towards Broad
River though wells
z To properly analyze concentration -distance, plotted concentrations need to be from wells positioned along the same flow path. This is particularly important
in fractured rock settings like Cliffside. An alternate method could be used if there were sufficient data (well) density, which would entail using an "aggregated
concentration" (geometric mean, for example) from wells within a certain distance range from the source. Then another set of wells from a distance range
further downgradient would also be aggregated. This would be repeated for different distance ranges downgradient from the source. The aggregated
concentration at each distance range would then be plotted versus distance from the source to evaluate concentration versus distance. The method used in
the CSA - one contaminated source area well is compared with an unrelated far side gradient "clean" well - is generally says little about not a useful analysis.
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DEQ Comment S.
The CSA was unclear on the presence of
discharge piping located in the area as the
outlet from the basin is described on page 3-
4 as "a 60-inch RCP" that extends 500 ft
through main dam, but the map in fig. 2-10
states that there are "discharge pipes"
(plural).
DEQ Comment 6.
Page 6-18 states that "Packer tests.... were
conducted in a minimum of five boreholes. "
Figure 1-2
Section 6.19
Report: Duke Energy Coal Combustion
Residuals Management Program, CCR Unit
History of Construction - Revision 0, Rogers
Energy Complex Cliffside Steam Station
(found at https://www.duke-
energy.com/ /media/pdfs/our-
company/ash-management/ccr-cliff-hist-
con.pdf?la=en)
U5-2S/SLA, CCR-U5-3D, and GWA-2S. The
data used in the modeling was performed for
wells with acceptable data quality (turbidity
less than 10 NTU) from the sampling events
that occurred in June and October 2018.
This comment is acknowledged.
The historic discharge piping associated with
the Inactive Unit 5 Basin was a 60-inch RCP
that ran from the discharge tower eastward,
through the embankment foundation to a
discharge structure located approximately
505 feet downstream of the embankment.
The discharge pipe was located
approximately 100-150 feet from the
northern end of the embankment. Historic
design drawings for the embankment were
reviewed and did not show other discharge
pipes'.
The location of this pipe is shown on
Drawing C-3036 and can be found on page
60 of the following report: Duke Energy Coal
Combustion Residuals Management
Program, CCR Unit History of Construction -
Revision 0, Rogers Energy Complex Cliffside
Steam Station (found at
https://www.duke-
energy.com/ /media/pdfs/our-
company/ash-management/ccr-cliff-hist-
con.pdf?la=en)
This comment is acknowledged.
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No mention was made regarding the actual
CSA Table 11-2 - Field Permeability Test
number or the well locations used or, more
Results contains the results of the field tests
importantly, what was learned by the packer
performed for the CSA. This table presents
tests or why the results matter. The CSA
the filed permeability test results and
stated only that to learn more about the
provides the name of the borings and well
packer data, the reader should refer to
ID.
Tables 6-17, 6-18, and Appendix C (1597
pages long). However, table 6-17 pertains
Packer tests (shut-in and pressure tests)
to porosity not packer test results. And
were conducted in 36 bore holes. The shut -
table 6-18 states in a footnote that the
in test is performed by isolating the zone
reader should refer to "Appendix H" for the
between the packers (in effect, a
raw packer worksheets, but Appendix H is
piezometer) and measuring the resulting
part of Appendix C of this report, and the
water level over time until the water level is
raw permeability worksheets were
stable. The shut-in test provides an estimate
intermixed with particle size distribution
of the vertical gradient during the test
figures, etc. It was confusing and time
interval. The pressure test involves forcing
consuming to tease out this basic
water under pressure into rock through the
information.
walls of the borehole providing a means of
determining the apparent horizontal
hydraulic conductivity of the bedrock. Each
interval is tested at three pressures with
three steps of 20 minutes up and two steps
of 5 minutes back down. The pressure test
results are summarized in Table 11-2 of the
August 18, 2015 CSA report and the shut-in
and packer tests worksheets are provided in
Appendix H of the August 18, 2015 CSA
Report.
Data from these tests was used, along with
other data, in presenting CSA data for
averse qroundwater velocity.
DEQ Comment 7.
Appendix C, Table 4
This comment is acknowledged.
Determinations of soil exceedances of POGs
were not based on the latest BTVs. And it
Section 6.19.1.6
The CAP Update considers unsaturated soil
appears that the soil exceedances identified
as a potential secondary source to
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in the report may be in error; the report
groundwater. Analytical results for
stated that POGs were exceeded for As, Cr,
unsaturated soil are presented on Table 8-3.
Co, Fe, Mn, Se, T/, and V, however, it
This table shows exceedances of PSRG POG
appears instead that POGs were exceeded
values for COIs within the waste boundary
for As, Co, Mn, Se, Tl, Sb, Ba, Sr, and SO4.
for As and Mn.
A portion of the exceedances were due to
lab detection limits being above the POGs.
The CAP Update considers saturated soil as a
component of the groundwater system and
includes the evaluation of potential impacts
in the flow and transport and geochemical
models.
Determinations of soil exceedances
presented in the CAP Update are based on
comparisons to PSRG for POG and updated
soil BTVs, whichever is greater. The soil
COIs presented in the CAP Update report
have been corrected to reflect unsaturated
soil constituents greater than their
comparison criteria at or beyond the
compliance boundary. The soil COIs
identified at the U5 AB in the CAP Update
report are: pH, arsenic, chromium, and
manganese.
DEQ Comment S.
Sections 6.19.2
This comment is acknowledged.
Sediment exceedances were noted but the
CSA did not discuss why these were
Appendix C, Table 5
Sediment sample results for the U5 AB area
important and how they affect CAP design.
are discussed in CAP Update Section
In addition, not al/ sediment sample
Figure 1-2
6.19.2. The discussion includes the
locations were shown on relevant figures 2-
comparison of results to background sample
10 and fig. 14-81 (e.g. CLFTD-004 and
results. The sediment exceedances at the
CLFTD-005 are not shown on either figure).
toe of the U5 AB are within the ash basin
Appendix E
compliance boundary.
The updated risk assessment (Appendix E)
found no evidence of unacceptable risks to
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human and ecological receptors exposed to
environmental media potentially affected by
CCR constituents at Cliffside.
All sediment sample locations are show on
Figure 1-2 including CLFTD-004 and
CLFTD-005
DEQ Comment 9.
Section 6.11.1
This comment is acknowledged.
To focus the information needed for CAP
Appendix J
design for the unit 5 basin source area, the
Surface water results associated with the U5
CSA needs to present SW results as "SWs
AB are discussed in Section 6.11.1 of the
associated with the unit 5 basin" Instead,
CAP Update. The Surface Water Evaluation
the report intermixed all SW samples
to Assess 02B Compliance reports presented
collected up and down Suck Creek and Broad
in Appendix J are separated by source
River in one sitewide discussion. And the
area.
CSA needs to show all SW sample locations
Figure 1-2
in the relevant figure (fig. 2-10) rather than
All surface water sample locations are shown
a subset (e.g. March 2014 NCDENR locations
on Figure 1-2 including the March 2014
were not shown). Finally, al/ SW sample
NCDENR sample locations.
results need to be compared to 2B
standards, including EPA criteria (Al, Sb, T/,
Surface water sample results are presented
Co, Se, Ra, HS, and Sr).
Appendix C, Table 2
in Appendix C, Table 2 and compared to
applicable 02B standards and USEPA
Appendix B, Table 9
National Recommended Water Quality
Criteria and in Appendix B Table 9.
DEQ Comment 10.
This comment is acknowledged.
A "white substance" was identified at the toe
Appendix B, Table 1
of the main dam on March 1 and 4, 2014 for
Dam inspections are performed weekly at
which DEMLR issued an NOD. The CSA
the U5 AB main dam. During these
stated dates on which the substance was not
inspections it is noted whether the white
observed but should instead report any
substance is present or not observed at the
dates on which it has been observed since
toe of the U5 AB main dam. Appendix B,
the initial discovery. The geochemica/
Table 1 identifies which inspections the
conceptual model and PHREEQC modeling
white substance was and was not observed
needs to discuss this substance since its
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origin was reportedly due to changes in
between August 18, 2015 and December 27,
geochemical conditions as waste water
2018.
discharges into the wetland area.
SEM-EDX analysis of the white material
indicates a composition of mostly aluminum -
silicate phases with secondary iron and
manganese oxides. Measurements of ion
concentrations within seeps were used as
input values for PHREEQC batch simulations.
A number of mineral phases were found to
be saturated but the SEM-EDX data available
cannot distinguish between the various
potential aluminum -silicate phases.
Simulations were run using the phreeqc.dat,
Ilnl.dat, and mintegv4.dat databases to
evaluate the range of possible phases. The
primary AI -Si bearing phases that were
saturated included: Pyrophyllite, kaolinite,
illite, montmorillonite, leonhardite, and mica.
SiO2 phases quartz, cristobalite, and
chalcedony and the MnO2 phases pyrolusite,
nsutite, and birnessite were also saturated.
Though unlikely to form under these
conditions, hematite was many orders of
magnitude above saturation as well as the
more likely goethite and ferrihydrite phases.
Running PHREEQC in batch mode and
allowing each of these phases to form under
the EQUILIBRIUM_PHASES command
indicates that pyrophyllite will precipitate
using the standard phreeqc.dat database.
Considering how near saturation the seep
water is for many mineral phases, the most
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likely pathway of formation is due to slight
evaporation of the seep water when it
reaches the surface resulting in the
formation of a supersaturated solution and
then precipitation. Assuming that the
oxidation state of the mobile iron and
manganese within the seep waters is Fe(II)
and Mn(II), oxidation by dissolved oxygen
once the seep water equilibrates with the
atmosphere will result in formation of
manganese oxide and iron oxide minerals.
Manganese oxide minerals are known to co -
precipitate a wide range of other ions and
iron oxide minerals are strong sorbents.
Therefore, formation of these manganese
and iron oxide minerals has the potential to
limit the mobility of other constituents if
they are present.
The appearance and disappearance of this
material is proposed to be associated with
rainfall and wet -dry cycling. Rainfall and
runoff can both decrease the saturation
state of the mineral leading to dissolution
and physically transport the white substance
with flow.
As noted in the response to DEQ Comment
8, The updated risk assessment (Appendix
E) found no evidence of unacceptable risks
to human and ecological receptors exposed
to environmental media potentially affected
by CCR constituents at Cliffside.
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DEQ Comment 11.
Appendix E
This comment is acknowledged.
Ecological risk was not evaluated for the
area of the unit 5 basin (risk exposure area
An updated Human Health and Ecological
4). The report stated that "SW samples
Risk Assessment is presented as Appendix
have not been collected in Exposure Areas 3
E in the CAP Update. The updated report
and 4 since the 2016 risk assessment" and
includes an ecological risk assessment for
"AOW samples were not evaluated as part of
Exposure Area 4, located downgradient of
the risk assessment due to being included
the U5 AB, between the basin and the Broad
under the NPDES program" To allow a
River. For Exposure Area 4, that report
review in accordance with 02L .0106 (i), an
concluded there is no evidence of
ecological risk assessment needs to be
unacceptable risks to human and ecological
performed for area 4 (unit 5 basin).
receptors exposed to environmental media
potentially affected by CCRs at Cliffside.
This conclusion is further supported by
multiple water quality and biological
assessments conducted by Duke Energy as
art of the NDPES monitoring program
DEQ Comment 12.
Sections 6.2.2 (AAB and ASA), 6.11.2 (U1-4
This comment is acknowledged.
The report states that "there are no
AB), and 6.20.2 (U5 AB)
indications that potential risks to off -site
The CAP Update provides an updated
residences exposed to groundwater exist"
evaluation of analytical results in samples
and that "these [private supply] wells reflect
collected from private water supply wells
natural background concentrations. While
near CSS. This evaluation is presented in
the Division is receptive to the argument
CAP Update Sections 6.2.2 (AAB and ASA),
that CCR impacts to area supply wells are
6.11.2 (U1-4 AB), and 6.20.2 (U5 AB). A
unlikely, the rationale and evidence (i.e.
well -by -well summary of COI exceedances
corroborating data) used in the report to
Table 6-9
and characterization is provided in CAP
make this case is mostly cursory and spread
Update Table 6-9. The findings of the water
in pieces across numerous sections of the
supply well evaluation found that no private
report. The report states that "Recent
drinking water wells are impacted by COIs
(2016-2017) analytical results from off -site
attributable to the CSS ash basins.
water supply wells indicate that constituent
concentrations are less than 2L or less than
In addition the review of current and historic
PBTVs for site groundwater, with the
results from off -site water supply wells,
exception of four vanadium detections':
predictive flow and transport modeling found
However, the Appendix B table shows many
that Site -related COIs will not affect off -Site
water suply wells. Using em irical Site
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more exceedances. Many of the
data, groundwater flow and transport
exceedances are for wells sampled in 2014
modeling simulations support groundwater
or 2015 which also needs to be considered.
flow is away from water supply wells and
A total of 26 supply wells exceeded or had a
that there are no exposure pathways
lab detection limit above the vanadium
between the groundwater flow -through the
IMAC/BTV. One well exceeded the BTV for
ash basin and the pumping wells used for
strontium. And four wells exceeded the
water supply in the vicinity of the Cliffside
2L/BTV for manganese.
site.
Domestic and public water supply wells are
outside, or upgradient of the groundwater
flow system containing the ash basins and
ASA. Domestic water supply wells are not
affected by constituents released from the
ash basins or ASA or by the different closure
options, according to groundwater flow and
transport model simulations.
Based on predicted groundwater flow
patterns, under post ash basin closure
conditions, and the location of water supply
wells in the area, groundwater flow direction
from the ash basins is expected to be further
contained within the stream valley and
continue flowing north of the ash basin
footprints, and therefore will not flow
towards any water supply wells.
DEQ Comment 13.
Section 6.19.3
This comment is acknowledged.
The CSA states that only As, B, Cr, Co, Fe,
Mn, Sr, 5O4, Tl, TDS, and V are being
The COIs associated with the U5 AB have
considered for MNA in the CAP for the unit 5
been refined in the CAP Update using the
basin source area. The CSA needs to state
COI Management Process described in the
how these and only these constituents were
Table 8-6
report (Section 6.19.3).
selected for consideration.
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Table 8-6 is the COI Management Matrix for
the U5 AB. All identified COIs are
considered for corrective action in the CAP
Update. The proposed groundwater
remedial alternative for the U5 AB is
groundwater extraction.
DEQ Comment 14.
Appendix G
This comment is acknowledged.
An assessment is needed of the potential
impact on the leaching of saturated ash due
The flow and transport model is currently a
to river stage fluctuations and (or) GW level
steady state model using hydraulic head
fluctuations.
verages. For future evaluations, historical
ater levels within ash basin monitoring
ells and monitoring wells adjacent to the
ash basins can be evaluated to determine
he maximum hydraulic head. Given that
heavy storms can result in pronounced
emporary groundwater level increases
(which are dependent upon the rain event,
local geology, topography, spatial extent
and geomorphic setting of any engineered
ap, and proximity to surface waters) which
an potentially reverse the local head
gradients. The flux of the river stage would
have a very little impact on the hydraulic
heads within the ash basins at Cliffside and
re mostly affected by groundwater fluxes.
Units 1-4 inactive basin is a former dammed
ash basin about 15 acres in size located on
the banks of the Broad River, a Class IV-WS
water of the state. The basin has been
excavated and has no compliance boundar .
DEQ Comment 1.
Sections 6.10
This comment is acknowledged.
The description of contaminated GW was
focused mostly on simply summarizin the
Section 6.10.1.7
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mapped and tabled data. Very little
The CAP presents a comprehensive
interpretation was provided to explain the
understanding of the results of the
source of or reason for the observed
investigations performed at the site,
concentrations in different areas within and
including the elements required by 02L
surrounding the units 1-4 inactive basin,
.0106. The CAP Update also identifies the
whether of ash, pore water, or upgradient or
sources at the site, including the Former
overlying contaminated units. A map was
Units 1-4 Ash Basin (U1-4 AB), and contains
provided showing the upward or downward
sufficient interpretation of the site data to
trend of boron in most wells across the
develop a corrective action plan.
facility but this map was not actually used in
Figures 6-43a through 6-44c
any meaningful way in discussions about
Updated trend analyses were performed on
local contaminant distribution and
groundwater data from wells in the ASA.
movement. Only one contaminant cross
These results are discussed in CAP Update.
section map was provided for the 15-acre
The CAP Update and supporting Appendices,
area (H-H, figs. 11-76 to 11-90). Pore
presents discussions and data by individual
water was not used to explain the
source area. The MNA report, Appendix ],
downgradient concentrations and movement
Figures 5-4a, 5-5b, 5-5c
includes updated trend analyses, including
of contamination.
statistical trend analyses of concentrations
along pertinent cross sections along with
discussions of contaminant behavior.
The source material within the U1-4 AB
including the history of the material and the
chemistry of the material is presented in
CAP Update Section 6.10. A description of
upgradient sources that may be contributing
to the COI concentrations at the U1-4 AB are
presented in Section 6.10.1.7.
Two (2) cross -sections are mapped through
the U1-4 AB. Cross sections with COI
concentrations are presented as Figures 6-
43a through 6-44c.
Revised water level maps are presented as
Figures 5-4a/b/c. These maps present a
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refined potentiometric surface based on the
additional wells installed in the area.
The potential for pore water to contribute to
the underlying groundwater system is
discussed for each source area in the CAP
Update in the section titled Saturated Ash
and Groundwater. These sections also
contains discussions of the behavior, extent,
and movement of COIs.
DEQ Comment 2.
Figure 5-4a, 5-4b, 5-4c
This comment is acknowledged.
Section 10 summarized contaminant
exceedances in GW that included areas well
The groundwater level maps (Figure 5-4a,
upgradient of the basin (e.g. TDS in bedrock
5-4b, 5-4c) included in the CAP Update
well GWA-44BR; SO4 in GWA-44S; Mn in
depict a refined understanding of the
GWA-33D; etc). However, the CSA did not
groundwater flow directions in this area of
evaluate whether the upgradient wells that
the site. Groundwater at monitoring well
contained exceedances were hydraulically
clusters GWA-44 and GWA-33 are
linked to the downgradient wells with
hydraulically upgradient of monitoring well
exceedances of the same constituent, nor
location GWA-1313R. Monitoring well GWA-
did it compare the geochemical conditions
Figures 6-46 through 6-56b
13BR is located adjacent to and upgradient
between the two. The CSA did not discuss
of the U 1-4AB.
the implications of the upgradient
exceedances on the need for GW restoration
Figure 6-46 through 6-56b present
at the basin or for CAP design. It was
isoconcentrations for COIs in wells at the
suggested elsewhere in the report that these
U1-4 AB, including the wells referenced in
areas may be associated with a newly
the comment. T
identified source area in the vicinity of unit 6
Figure 5-7
(fig. 2-10) but no further discussion of this
Figure 5-7 reports the latest boron
new source was provided.
analytical results reported in each of the
monitoring wells near Suck Creek.
Comparing COIs in the deep and bedrock
flow layers, it appears that TDS, sulfate,
manganese, lithium and strontium
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exceedances may be emanating from these
upgradient sources, including the flow under
Suck Creek from the AAB and from the Unit
Section 6.16.2
6 source area, and flowing to the upgradient
Section 6.17
areas of the U1-4AB.
As described in Section 6.17 of the CAP
Update, Phytoremediation and TreeWellTM
Technology, is the proposed groundwater
remedial alternative. This alternative is
discussed in detail in Section 6.16.2 of the
CAP Update. This remedial alternative is
proposed to be installed between the U1-4
AB dam and the Broad River to treat
impacted groundwater that passes under the
U1-4 AB footprint prior to intersecting the
Broad River. Any impacted groundwater
emanating from sources upgradient of the
U1-4 AB (including groundwater at GWA-44
and GWA-33) would also flow through this
groundwater treatment system.
The potential Unit 6 source area is being
assessed under a separate timeline. Based
on a review of the data presented on Figure
5-7, monitoring wells at clusters GWA-60,
GWA-44, GWA-61, and MW-23 are
associated with the Unit 6 source area due
to their lack of boron reported at
concentrations greater than the background
value for boron of 50 pg/L. The results of
the Unit 6 assessment will be presented in a
CSA report to NCDEQ by March 31, 2020.
There is not an obvious source in this area
to attribute any exceedances to.
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DEQ Comment 3.
Section 6.10.4
This comment is acknowledged.
On page 11-6, the CSA incorrectly stated
that "The vertical extent of the plume does
The CAP Update accurately describes and
not extend into the transition zone or
depicts the horizontal and vertical extent of
bedrock beneath or surrounding the Units 1-
COIs associated with the U1-4 AB in Section
4 inactive ash basin at concentrations
6.10.4. This includes a description of the
greater than the 2L standard" Numerous
vertical extent of COIs in the deep and
exceedances of deep contamination were
bedrock flow layers.
noted including, for example, at GWA-1OD,
GWA-IIBRU, IB-ID, and IB-3D.
Wells GWA-10D, GWA-11BRU, IB-1D, and
IB-3D are located within the compliance
boundary for the U1-4 AB.
The CAP Update performed and evaluation of
potential impacts to surface water in the
Broad River and in Suck Creek and found no
violations of surface water quality standards
for current conditions and for future
conditions.
DEQ Comment 4.
Section 6.10.3
This comment is acknowledged.
The plots and discussion of contaminant
concentration versus distance from source
Appendix I
The CAP Update did not find boron,
are misleading. Referring to figs. 11-55 to
chromium, and thallium to be COIs for
11-57, the CSA states that "Boron,
groundwater at the U1-4 AB (Section
chromium, cobalt, manganese, sulfate, and
6.10.3).
thallium in the shallow flow layer show net
increasing trends from the [units 1-4 basin]
U1-4 AB has been excavated, boron
source area to the waste boundary." The
concentrations greater than 02L are not
shallow unit wells to which this statement
observed and the boron plume is not
refers are actually pore water wells and
expected to expand in the future.
reflect variable conditions within the
wastewater itself and do not reflect
Revised time versus distance plots are
conditions in the shallow GW flow unit. IB-
provided as Figures 5-2 through 5-6 in the
4S-SL (B = 390) is in the middle of the basin
MNA report (Appendix I). Plume
and IB-3S (B = 590) is near the edge of the
characteristics and predictions of plume
basin. Both are in ash and both are
migration are presented in Section 5 of the
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representative of "source" conditions. Such
MNA report (Appendix I). Monitoring wells
wells do not portray the attenuation of
are identified correctly identified in these
shallow boron away from the source area as
figures as pore water or groundwater wells.
intended, rather they portray spatial
variations in waste water concentrations.
Monitoring of COIs within the U1-4 AB
The fact that one source location has a
footprint and its downgradient area are
higher pore water concentration than
plotted in Figures 5-106 to 5-117 in
another source location is not surprising and
Appendix I. With minor exceptions, most
points to factors that affect wastewater
COIs have been relatively stable during the
concentrations such as ash makeup,
period of available monitoring data. Trends
thickness, and local geochemistry.
for COIs at the U1-4 AB, based on updated
Concentrations are not necessarily
monitoring data, are presented in Table 5-7
"trending" upward in the direction toward
of the MNA report (Appendix I).
IB-3S as described, rather they reflect the
fact that spatial variations exist in
wastewater within the waste boundary and
may or may not be gradational.
DEQ Comment S.
Appendix I
This comment is acknowledged.
In some cases, the concentration versus
distance plots were not constructed
Revised time versus concentration plots are
appropriately. For example, two of the three
provided as in the MNA report (Appendix
deep wells plotted in figs. 11-55 to 11-57
I). Plume characteristics and predictions of
represented data sampled 17 months apart
plume migration are presented in Section 5
(IB-4D on 913115 and IB-3D on 2114117).
of the MNA report. As described in the
So, in this case, the "distance" variable was
response to the previous comment, trends
conflated with "time': Were the
for COIs at the U1-4 AB, based on updated
concentrations shown in the plots due to
monitoring data, are presented in Table 5-7
distance or to the passage of time. The
of the MNA report (Appendix I).
third of the three deep wells plotted (GWA-
Concentration versus distance plots were not
29D, boron is below detection) was far side-
used for the U1-4 AB in this evaluation. Well
gradient and according to potentiometric
GWA-29D was not used in this evaluation.
maps (fig. 6-18) appears to be recharged
from water in a "clean" upslope area not
associated with the basin. So the inclusion
of this well on the plot is not appropriate.
Rather, the third well if included should
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have been farther downgradient along the
contaminated flowpath (because of the
terrain and proximity of the Broad River, no
such well existed). As presented, the plots
incorrectly imply that contaminant levels
decrease rapidly to below detection just
downgradient of the basin when, in fact, this
is unlikely. Similar issues were noted for
concentration -distance plots associated with
other source areas.
DEQ Comment 6.
Appendix B, Table 4
This comment is acknowledged.
An upward vertical gradient was observed
(0.2 ft in GWA-14S/D) upgradient of the
The vertical gradient reported between
basin. Although 0.2 ft is not a large
monitoring wells GWA-14S and GWA-14D in
difference, because it did not align with the
the CSA Update was incorrect. Appendix B,
conceptual mode/ of downward gradients in
Table 4 presents the corrected vertical
upslope and basin areas and upward
gradient at this location. A downward
gradients along areas of GW discharge, the
gradient exists at monitoring well cluster
CSA needs to explain this occurrence and
GWA-14 between the shallow and deep flow
how it relates to GW flow in the area.
layers which is consistent with the site CSM.
DEQ Comment 7.
Appendix C, Table 4
This comment is acknowledged.
Soils in three borings across the basin and
residua/ soils collected post excavation
Unsaturated soil at or near the compliance
contain Sb, As, Se, Sr, 5O4, and T/ above
boundary is considered a potential
the POG/BTV (Appendix B dataset). The
Figure 6-42
secondary source to groundwater.
CSA was inconsistent when presenting these
Constituents present in unsaturated soil or
exceedances. For example, the report text
partially saturated soil (vadose zone) have
acknowledged only As and Cr. Figure 7-2
the potential to leach into the groundwater
acknowledged only As, Cr, and T/. The
Section 6.10.4.1
system if exposed to favorable geochemical
report did not discuss whether these soil
conditions for chemical dissolution to occur.
concentrations are impacting GW or
COIs in saturated soil are considered and
implications for receptors.
evaluated as part of the groundwater flow
system, separate from this evaluation.
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The soil sample analytical results are
presented in CAP Update Appendix C, Table
4 and the location of the soil samples are
included in Figure 6-42.
As discussed in CAP Update Section
6.10.4.1, the COIs in unsaturated soil at the
U1-4 AB at or beyond the compliance
boundary were limited to pH and arsenic at
the GWA-10D location. The evaluation
found that it was unlikely that these
exceedances are associated with the basin
due to a lack of transport mechanism and
that no corrective action for soil at this
location is proposed.
Appendix E
Potential impact to receptors is evaluated by
the risk the updated risk assessment. The
updated risk assessment incorporates results
from surface water, sediments, and
groundwater samples collected March 2015
through June 2019.
Primary conclusions from the risk
assessment update include: (1) the ash
basins do not cause an increase in risks to
potential human receptors located on -Site or
off -Site; and (2) the ash basins do not cause
an increase in risks to ecological receptors.
DEQ Comment 8.
Sections 6.10.2, 6.11.1
This comment is acknowledged.
Sediments sampled in six locations
(Appendix B dataset) associated with the
COI extents reported in sediment are
basin contain As (5 locations), Mn (1
discussed in the CAP Update Section
location), and Se (1 location) above the soil
6.10.2. The Broad River surface water and
POG. Although the detection limits for T/
Appendix E 11
sediment immediate) down radient of the
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Sb, and Se generally were too high to
ash basins have been tested and comply
evaluate exceedances, the CSA did not
with applicable 15A NCAC 02B standards.
discuss. The CSA did not explain how SW
quality or the distribution of contaminated
As described above, unsaturated soil at or
GW relate to these sediment findings or
near the compliance boundary is considered
implications for receptors.
a potential secondary source to groundwater
and is evaluated in the CAP Update. COIs in
saturated soil are considered and evaluated
as part of the groundwater flow system.
Potential impacts to surface water were
evaluated in the CAP Update Section
6.11.1. This evaluation found that
groundwater migration from the ash basin
source area has not resulted in violations of
the 15 NCAC 02B surface water quality
standards in the Broad River or in Suck
Creek.
Potential impact to receptors is evaluated by
the risk the updated risk assessment. The
updated risk assessment incorporates results
from surface water, sediments, and
groundwater samples collected March 2015
through June 2019.
Primary conclusions from the risk
assessment update include: (1) the ash
basins do not cause an increase in risks to
potential human receptors located on -Site or
off -Site; and (2) the ash basins do not cause
an increase in risks to ecological receptors.
DEQ Comment 9.
Figure 1-2
This comment is acknowledged.
SW samples CLFSP051 and CLFT-D052 were
not mapped in the CSA (but were mapped in
Surface water sample locations CLFSP051
a February 2016 risk assessment re ort .
and CLFTD052 are presented on Figure 1-2.
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These samples had SW exceedances for
SO4, TDS, Al, and Co (CLFSP051 also
These locations are near SOC (S17-009)
exceeded for As). The CSA needs to discuss
sample locations 5-10 and 5-11. Table A in
this and implications for CAP design.
the SOC indicates these two locations were
"dispositioned via repair and/or non -flowing
condition to potentially reach WOTUS, or
other as noted". The text in the table states
"Following ash basin excavation and toe
drain removals, seep has disappeared".
These seeps are no longer present and are
not considered in development of corrective
action.
DEQ Comment 10.
Appendix E
This comment is acknowledged.
Ecological risks were associated with the
units 1-4 inactive basin (part of "area 1"in
Modeled risk estimates resulted in aluminum
the February 2106 Risk Assessment report)
HQs greater than 1 based on the NOAEL and
and included muskrat, robin, and vole
LOAEL for killdeer and muskrat. The
(aluminum). The CSA needs to discuss
modeled risk is considered negligible given
whether there are any extenuating
the natural occurrence of aluminum in
circumstances related to the sampling or
surface water, sediment, and soil in the
sample locations that may affect the
region. These results were included in the
implications for CAP design as part of 02L
consideration of remedial measures for the
.0106 i .
U1-4 AB.
DEQ Comment 11.
Section 6.10.3
This comment is acknowledged.
The CSA states that only B, Cr, Co, Mn, Sr,
5O4, Tl, TDS, and V are being considered for
COIs associated with the U1-4 AB have been
MNA in the CAP for the units 1-4 inactive
refined in the CAP Update using the COI
basin source area. The CSA needs to state
Management Process described in the report
how these and only these constituents were
Table 7-5
(Section 6.10.3)
selected for consideration.
Table 7-5 is the COI Management Matrix for
the U1-4 AB. All identified COIs are
considered for corrective action in the CAP
Update. The proposed groundwater
remedial alternative for the U1-4 AB is
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Phytoremediation and TreeWeIITM
Technology.
ACTIVE BASIN - THE ACTIVE BASIN IS DIVIDED INTO THREE SOURCE AREAS, EACH DISCHARGING TO A DIFFERENT RECEPTOR AREA.
THE THREE SOURCE AREAS ARE REFERRED TO HERE AS "ACTIVE NORTH'; "ACTIVE WEST'; and "ACTIVE SOUTH"
The "Active -North "source area is defined
here as that portion of the active basin that
discharges northward to the Broad River
through the northern dam. As defined, this
source area is about 25 acres in size and is
bounded to the south and west
(approximately) by AB-4 and to the north by
AB-1.
DEQ Comment 1.
The source footprint (i.e. ash and saturated
ash) was not well defined in the CSA.
Geologic cross section A -A' (fig. 6-2)
extrapolated across a 1000 ft length
between AB-4 (where ash was observed)
and the northern dam/waste boundary at
AB-1 (where ash was not observed).
Appendix B, Figure 1
Figures 6-2 through 6-5
Figure 6-6
This comment is acknowledged.
The description of waste material and the
history of placement are described in the
CAP Update. The source footprint (ash and
saturated ash) presented in the CAP Update
and in the isopach figures submitted to DEQ
was developed by data collected for
development of the closure plan. This
information was developed by use of
historical maps, site drawings, bathymetric
surveys (where needed) and geotechnical
borings performed for closure plan
development. This information provides
detailed depictions of the extent and
thickness of ash at the site.
The active ash basin (AAB) isopach figure is
presented as Appendix B, Figure 1. This
figure depicts approximate ash thicknesses
across the basin derived by comparison of
elevations between the existing top of ash
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from the 2015 topographic and bathymetric
surveys with pre -development topography
based on historical USGS topography. The
isopach figures were used to refine the ash
thicknesses presented in cross -sections. A
current conditions saturated ash thicknesses
fi ure is presented as Figure 6-6.
DEQ Comment 2.
Appendix B, Figure 1
This comment is acknowledged.
The CSA presented contradictory information
about the presence of ash in the ponded
The previous comment describes the process
area south of the northern dam. Cross-
used to develop an updated understanding
section map A -A' (fig. 6-2) shows the
of the extent and thickness of ash in the
absence of ash. Cross-section map F-F' (fig.
AAB.
6-7), perpendicular to and crossing A -A,
shows the presence of ash in the same
Figures 6-2 through 6-5
location. The CSA must be internally
consistent and have a rational basis for the
information provided. Because ponded
Figure 6-6
conditions prevented direct observation of
ash within the ponded area, the CSA needs
to reference engineering drawings and
historic topographic maps to carefully
determine the extent and volume of the ash.
DEQ Comment 3.
This comment is acknowledged.
GW flow directions are uncertain in the area
Figure 1-2
about 300 ft N-NW of AB-4 where GW
Groundwater flow directions in the area
divides and flows either W toward Suck
referenced in the comment are refined based
Creek, NW toward the western ash storage
on the additional wells installed in the area
area and then to the Broad River, or N
north of AB-4.
toward the Broad River. WL observations
were limited in this area. The CSA stated in
Monitoring wells AB-8S/I/BRU/BR, AB -
general terms throughout the report that
Figures 5-4a, 504b, 5-4c
7S/BRU/BR and AB-9S/D/BR were installed
GW "flows primarily north toward the Broad
northwest of well cluster AB-4 within the
River and, in the case of the active basin,
footprint of the AAB (Figure 1-2) to refine
also west toward Suck Creek." The CSA did
groundwater levels (Figures 5-4a, 5-4b, 5-
not define the location of the GW divide
Figures 5-6a and 5-7a
4c) and flow directions in this portion of the
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between the two areas or discuss why it
site. Based on the updated groundwater
matters. If it is determined that GW
level maps, shallow groundwater flows out
restoration is required in this area, an
radially from the ash stockpile located in the
understanding of the local GW flow
Section 5
AAB.
directions will be needed. Specifically, the
location of the GW flow divide would need to
Groundwater, and associated movement of
be determined so that any proposed
COIs is generally flows to the north,
corrective actions for "Active North", "Active
northwest, and southwest from the
West', and the "Ash Storage Area" are
stockpile. The groundwater on the north
based on an accurate understanding of
side of the stockpile flows north to the Broad
contaminant movement within, toward, or
River, with a portion of the water flowing to
away from the three source areas. All well
the northwest toward Suck Creek.
data needs to be utilized for WL contouring
Groundwater on the northwest side of the
of figs. 6-15 to 6-20, and if it is determined
stockpile flows northwest, through the AAB
that an additional piezometer(s) are still
upstream dam toward Suck Creek.
needed to understand GW movement in the
Groundwater on the west side of the
area of the divide then it/they need to be
stockpile flows generally southwest to Suck
installed and measured (WL) quickly and
Creek. Groundwater to the east of the
used as part of the CAP development.
stockpile flows generally northeast through
the AAB and ultimately to the Broad River.
The flow and transport model has also
refined the understanding of groundwater
flow directions in the central portion of the
AAB and across the site. Simulated
groundwater flow vectors for current site
conditions are presented as Figures 5-6a and
5-7a in the CAP Update.
The site CSM discusses this area. The CAP
considers the AAB and the ASA both in the
same source area for purpose of remedial
action.
DEQ Comment 4.
Figures 5-4a, 5-5b, 5-5c
This comment is acknowledged.
The description of contaminated GW was
focused mostly on simply summarizin the
Section 6.1.5
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mapped and tabled data. Very little
The CAP presents a comprehensive
interpretation was provided to explain the
understanding of the results of the
source of or reason for the observed
investigations performed at the site,
concentrations in different areas within and
including the elements required by 02L
surrounding the Active North source area,
.0106. The CAP Update also identifies the
whether of ash, pore water, or upgradient or
sources at the site, including the AAB, and
overlying contaminated units. A map was
contains sufficient interpretation of the site
provided showing the upward or downward
data to develop a corrective action plan.
trend of boron in most wells across the
facility but this map was not actually used in
There is a groundwater flow path from the
any meaningful way in discussions about
active ash basin through the downstream
local contaminant distribution and
dam to the Broad River. This is depicted on
movement. Pore water was not used to
the updated groundwater level maps
explain the downgradient concentrations and
Figures 6-9a, 6-9b, and 6-9c
(Figures 5-4a/b/c) presented in the CAP
movement of contamination. Only one
Update.
contaminant cross section was mapped
through the source area (A -A, figs. 11-61 to
As discussed in CAP Update Section 6.1.5
11-75). While we recognize that the ponded
COI Distribution in Groundwater, Mann -
area prevented the installation of monitor
Kendall trend analyses were performed for
wells in ideal locations, the use of wells MW-
conservative constituents datasets for
10SID and CCR-4D to map the migration of
porewater and groundwater wells within the
contamination along a cross section needs to
waste boundary, including boron, based on
include an acknowledgement that these
updated monitoring results. Ash pore water
wells may not be measuring the relative
wells with increasing trends for conservative
heart of the contaminant plume in the same
constituents are AB-3SL, AB-4S/SL, AB-5S,
way that AB-4 and AB-1 are expected to be.
and AB-6S. Only one constituent (boron) at
one groundwater well within the waste
boundary (AB-3BRUA) was found to have an
increasing trend. All other results were
found to indicate no trend, stable trends or
decreasing trends.
The CSA stated that the ash basins and the
ash storage areas were determined to be the
source of groundwater COIs.
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Ash stored in the active ash basin and
porewater are contributing to the
exceedances of comparison criteria near the
compliance boundary. Boron concentrations
in groundwater in this area are generally
greater than background but less than the
02L standard downgradient of the porewater
and wastewater in the AAB with the
exception of beneath the downstream dam
as reported in AB-1D. This is consistent with
the CSM with the basin acting as a flow -
through system. Concentrations reported in
porewater are greater than the
downgradient groundwater. Well clusters
AB-4, AB-9, AB-1, and GWA-21 are located
on this cross section and are appropriate to
assess the relative heart of the impacted
groundwater plume. Wells MW-10S/D and
CCR-4D are not used along this cross
section.
The potential for pore water to contribute to
the underlying groundwater system is
discussed for each source area in the CAP
Update in the section titled Saturated Ash
and Groundwater. These sections also
contains discussions of the behavior, extent,
and movement of COIs.
DEQ Comment 5.
Appendix I, Figure 5-44
This comment is acknowledged.
The CSA shows boron -vs -time plots (figs.
11-49 to 11-51) that omitted a key and
Time versus concentrations for boron in the
informative well location, MW-20D. Boron
north transect are presented in the MNA
has been increasing in MW-20D (from 100 to
report in Appendix I. The boron results in
600 ug/L) over six years, calling into
MW-20D are presented in the MNA report.
question whether concentrations of this and
Section 5.1.2
other contaminants will continue to increase
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with time in this area of GW discharge. The
Figure 6-8a
Figure 5-44 of the MNA report show that
well that was plotted, GWA-21D, located 200
boron concentrations in MW-20D, while
ft to the east, shows boron with essentially
Section 6.1.4
increasing from 2013 to late 2018 (552
no change over a three-year period (from
pg/L) have stabilized and have decreased
150 to 137 ug/L). It would be useful to
since late 2018, with the April 2019 results
understand why concentrations are steadily
of 153 pg/L. As shown on Figure 6-8a,
increasing in MW-20D and are much lower
concentrations of boron at GWA-21 range
and unchanging in GWA-21D located 200 ft
from 133 pg/L in GWA-21S to 156 pg/L in
away. Understandings in this local area
GWA-21BRU.
need to be presented in the CSA to support
CAP design.
Discussion of this COI distribution in
groundwater northeast area of the AAB
downstream dam is presented in the CAP
Update Section 6.1.4.
DEQ Comment 6.
Section 6.1.4
This comment is acknowledged.
Contaminated GW from the "Active North"
source area discharges to the Broad River
COI distribution (horizontal and vertical
receptor along the compliance boundary at
extent) at AAB has been refined using the
levels that exceed 2L/IMAC standards. This
COI Management Process described in the
contamination will need corrective action but
CAP Update and the areas in need of
the CSA maps and discussion did not
corrective action have been defined.
indicate this clearly. For example, the iso-
Figures 6-17 through 6-28
concentration maps presented for shallow Fe
Isoconcentration maps (Figures 6-17
(fig. 11-19), Mn (fig. 11-22), and Co (fig.
through 6-28) have been revised and
11-16) show "PBTV contours" that depict
accurately depict COI distribution at the
where that contaminant is above background
AAB. All existing data were used for
but do not make clear that these areas, if
isoconcentration mapping (including MW-
they are at or beyond the compliance
11DA, MW-11D, MW-11BRO, and A13-113RO).
boundary, require corrective action. The
Exceedance contours were drawn using
same is true of deep Fe (fig. 11-20), Mn (fig.
available data and professional judgement
11-23) and bedrock Mn (fig. 11-24). The
based on the CSM and understanding of
shallow V PBTV contour is not shown at all in
localized subsurface conditions. These
fig. 11-37 even though shallow V is above
isoconcentration maps were developed for
the PBTV (e.g. GWA-22S and requires
all flow layers.
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restoration. The deep V PBTV contour is not
shown at all in fig. 11-38 even though deep
The CAP Update utilized these
V is above the PBTV (e.g. GWA-22BRU) and
isoconcentration maps to identify the area
requires restoration. The CSA needs to
and flow units in need of corrective action.
clearly define the areas (and flow units) and
The area where the proposed remedial
contaminants in need of corrective action
system is to be installed is shown on Figure
pursuant to 02L .0106. Unless data to the
6-32a. The proposed system was developed
contrary are provided and explained in the
by utilizing all available data and by use of
report, the exceedance contours need to be
the modeling.
open to the Broad River for all flow units. All
existing data need to be used for
isoconcentration mapping, including MW-
11DA and MW-11D, and all additional wells
needed to understand contaminated GW
conditions should be installed and sampled
prior to the development of the CAP for this
area including MW-11 BRO and AB-1 BRO.
DEQ Comment 7.
Figure 1-3
This comment is acknowledged.
The CSA does not mention or account for the
fact that an historic channel (Suck Creek)
The CAP presents a comprehensive
existed in the centerline of the active basin
understanding of the results of the
prior to Duke's channelizing and re -directing
investigations performed at the site,
the flow away from the current footprint of
including the elements required by 02L
the active basin in order to construct the
.0106. The CAP Update also identifies the
active basin. This is a problem because the
sources at the site, including the AAB, and
remnant channel, to some extent, would be
contains sufficient interpretation of the site
expected to result in preferential pathways
data to develop a corrective action plan.
in the shallow and (or) deep system that
Section 5.1.1
would not otherwise exist and, judging from
Section 5.2
The diversion of Suck Creek is discussed in
the report, this issue has not been
the CAP Update CSM (5.1.2.1). The
considered. Site conditions (WLs, Ks, boron
referenced site conditions (WLs, Ks, boron
concentrations, vertical gradients, etc) need
concentrations, vertical gradients, etc.) and
to be evaluated to determine what affect the
the potential effects on flow and COI
remnant channel has on contaminant
movement included in the F-T model. This
movement from the "active north"and
model accounts for the effects of the
"active south": The goal is to understand its
remnant channel on the groundwater flow
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effect and account for it as needed in the
and associated COI movement in the AAB
CAP design. If additional data would help
(and the other source areas) and was used
discern the effects then this data needs to
in the development of the remedial action
be collected and evaluated during
proposed in the CAP.
preparation of the proposed remedy for each
source area.
The historic Suck Creek channel was near
the middle of the AAB as shown on Figure
1-3 in the CAP Update. The creek
previously passed through the current
location of the AAB upstream dam,
meandered through the current AAB
footprint and flowed through the location of
the AAB downstream dam, prior to its
confluence with the Broad River.
The ash basins are predominantly horizontal
water flow -through systems. Groundwater
enters the upgradient sides of the ash
basins, is supplemented by rainfall
infiltration, flows laterally through the middle
Appendix G
regions of the ash basins under a low
horizontal gradient, and then flows
downward near the dams. These flow
systems result in limited downward
migration of COIs into the underlying
saprolite upgradient from the dams. Near
the dams, COIs in water either discharge
through an NPDES permitted outfall or flow
downward out of the basin and under the
dams. Beyond the dams, groundwater flows
laterally or upward toward the Broad River
or Suck Creek, limiting downward migration
of COIs to the areas proximate to the dams.
The horizontal flow -through water system
related to the AAB has resulted in limited
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transport of COIs from the basins into
underlying groundwater, even though the
former Suck Creek channel was located in
the central portion of the AAB.
Monitoring wells GWA-20S/D/BR, AB-
2S/D/BRO, AB-8I/BRU/BR, AB-
3I/BRUA/BR/BRA, AB-4D/BR, and AB-
1S/D/BROR are located beneath the AAB
generally along the former alignment of
Suck Creek. These monitoring wells
currently provide a robust network to assess
groundwater quality along the former creek
alignment.
The flow and transport model demonstrates
that after the AAB is decanted and closed,
the groundwater flow regime will return to
natural conditions, including groundwater
flow contained within the former stream flow
system, lower groundwater levels, and
reduced downward vertical gradient near the
dams. The natural upward head along the
former Suck Creek stream valley will
continue to minimize the horizontal and
vertical extent of constituent migration.
These anticipated changes are shown by the
groundwater flow and transport model
(Appendix G .
DEQ Comment S.
Appendix C, Table 4
This comment is acknowledged.
Soil beneath the ash was sampled in only
one location (AB-4BR, 44 ft b/s) within the
Soil beneath the ash in the AAB was also
25-acre source area.
collected and analyzed from AB-SBRU (38.5-
40 feet bgs and 43.5-45 feet bgs), AB-6D
(48.5-50 feet bgs), AB-7 (65, 75, and 120
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feet bgs), AB-8 (55, 65, and 70 feet bgs),
and AB-9 36.5 46.5 and 61.5 feet bgs).
DEQ Comment 9.
Section 1.3
This comment is acknowledged.
On page 12-7, the report states that "This
update to the human health and ecological
In accordance with North Carolina General
risk assessment supports a risk classification
Statue 130A-309.211(cl) (revised by House
of "low" for GW related consideration".
Bill 630 in 2016) Duke Energy connected 65
It is not clear how the CSA arrived at a low
eligible households to the public water
risk. The CSA needs to clarify on what
supply at occupied residences within a 0.5-
regulatory or technical basis a "low" risk
mile radius of the ash basin compliance
classification was suggested and why this is
boundaries. This, along with certain
suggested for the facility as a whole rather
improvements to the CSS dams completed
than individual source areas each of which
by Duke Energy, resulted in the ash basins
will require a closure plan.
(AAB, U1-4 AB, and U5 AB) being ranked as
low -risk as stated in correspondence from
DEQ to Duke Energy dated November 13,
2018.
DEQ Comment 10.
Section 6.1.3
This comment is acknowledged.
The report (p. 15-14) states that Co, Fe, Mn,
and Sr are being considered for an MNA CAP
The COIs associated with the AAB and ASA
for this source area.
have been refined in the CAP Update using
The CSA needs to state how these and only
the COI Management Process described in
these constituents were selected for
Table 6-6
the CAP Update report. Section 6.0 of the
consideration.
CAP Update lists the COIs for corrective
action in the AAB and ASA. These COIs are:
As, B, Co, Fe, Mn, Sr, SO4, TDS, TI, U
(total), and V.
CAP Update Section 6.1.3 describes the
process for evaluating if a COI is to be
retained for corrective action. Table 6-6
presents the COI Management Matrix for the
site COIs. This table presents the COIs
considered and the lines of evidence for
used in the evaluation process.
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As a result of the evaluation performed in
the CAP Update, Groundwater Extraction and
Infiltration Wells, is the proposed
groundwater remedial alternative for the
AAB and the ASA.
DEQ Comment 11.
Appendix G
This comment is acknowledged.
An assessment is needed of the potential
impact on the leaching of saturated ash due
The flow and transport model is currently a
to river stage fluctuations and (or) GW level
steady state model using hydraulic head
fluctuations.
averages. For future evaluations, historical
water levels within ash basin monitoring
wells and monitoring wells adjacent to the
ash basins can be evaluated to determine
the maximum hydraulic head. Given that
heavy storms can result in pronounced
temporary groundwater level increases
(which are dependent upon the rain event,
local geology, topography, spatial extent and
geomorphic setting of any engineered cap,
and proximity to surface waters) which can
potentially reverse the local head gradients.
The flux of the river stage would have a very
little impact on the hydraulic heads within
the ash basins at Cliffside and are mostly
ACTIVE WEST
affected b roundwater fluxes.
The "Active West" source area is defined
here as that portion of the active basin that
discharges westward to Suck Creek in the
area of the dam to Suck Creek. As defined,
this source area is about 14 acres in size
and, in very general terms, is bounded to
the south by CCR-14D, to the east by AB-3,
and to the north by CCR-8. This source area
is somewhat unique because its compliance
boundary extends beyond a major SW
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drainage feature - Suck Creek - that is a
Class WS-IV water of the state. So while
GW contamination may or may not extend
beyond the compliance boundary in this area
due to this SW feature, contaminated GW
discharge to Suck Creek must not cause
exceedances of the SW standards for certain
corrective actions to be allowable.
DEQ Comment 1.
Appendix B, Figure 1
This comment is acknowledged.
The source footprint (i.e. ash and saturated
ash) was not well defined in this area. The
The description of waste material and the
E-W geologic cross section K-K' (fig. 6-12)
history of placement are described in the
used to show where the ash and saturated
CAP Update. The source footprint (ash and
ash are located spans a distance of
saturated ash) presented in the CAP Update
approximately 800 ft through the waste
and in the isopach figures submitted to DEQ
boundary here but includes only two borings
was developed by data collected for
that contain ash. The two borings - at AB-2
development of the closure plan. This
and AB-3 - are separated by about 600 ft.
information was developed by use of
historical maps, site drawings, bathymetric
Figure 6-6
surveys (where needed) and geotechnical
borings performed for closure plan
development. This information provides
detailed depictions of the extent and
thickness of ash at the site.
The AAB isopach figure is presented as
Appendix B, Figure 1. This figure depicts
approximate ash thicknesses across the
basin derived by comparison of elevations
between the existing top of ash from the
2015 topographic and bathymetric surveys
with pre -development topography based on
historical USGS topography.
The isopach figures were used to refine the
ash thicknesses presented in cross -sections.
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Monitoring wells AB-8S/I/BRU/BRU were
installed generally between the AB-3 and
AB-2 locations in the AAB. The lithological
data from the borings at this location have
been incorporated into cross section K-K'.
A current conditions saturated ash
thicknesses is presented as Figure 6-6.
DEQ Comment 2.
Figure 1-2
This comment is acknowledged.
Although a large cell of ash (reportedly
300,000 cubic yards) was moved from the
Section 6.1.5
The footprint of the ash stockpile located
southern portion of the active basin to this
within the footprint of the AAB is identified in
Active -South Dam source area, the CSA only
Figure 6-4
plan view on Figure 1-2 of the CAP Update.
mentioned it in passing with a sentence (p.
As described above, the extent and
3-2. The CSA did not map its location nor
thickness of ash in each source area was
describe any details. Movement of this
mapped. The information from this mapping
massive volume of ash would be expected to
was used in the flow and transport model,
impact GW contaminant concentrations in
which is used to predict groundwater flow,
time and space in and downgradient of the
associated COI movement, and to design of
area3, information that would be very
the proposed groundwater remedial
valuable to modeling efforts and CAP design
alternative for the source area.
as it is a fully monitored example of
waste/plume evolution in time and space.
The ash stockpile is depicted on cross
section K-K' on Figure 6-4.
The ash stockpile has been identified as a
continuing source of COIs contribution to
groundwater and has been accounted for in
the flow and transport model. Flow and
transport modeling has shown that this area
is a continuing source of COIs to the
3 Contaminated GW increases are seen in certain wells (e.g. CLMW-1) downgradient of the "new" ash location.
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groundwater which has resulted in proposed
active remedial action in the ash storage
area, at the AAB compliance boundary.
With regard to the referenced increase in
COI concentrations in downgradient wells
(e.g. CLMW-1), the maximum measured
concentration of boron (1850 pg/L) in
CLMW-1 was measured on 12/2/2016. Since
then the concentrations have decreased with
a concentration of 1360 pg/L measured on
1/28/2019.
As discussed in CAP Update Section 6.1.5
COI Distribution in Groundwater, Mann -
Kendall trend analyses were performed for
conservative constituents datasets for
porewater and groundwater wells within the
waste boundary, including boron, based on
updated monitoring results. Ash pore water
wells with increasing trends for conservative
constituents are AB-3SL, AB-4S/SL, AB-5S,
and AB-6S. Only one constituent (boron) at
one groundwater well within the waste
boundary (AB-3BRUA) was found to have an
increasing trend. All other results were
found to indicate no trend, stable trends or
decreasing trends.
Groundwater Trends for the AAB East at
downgradient dam area:
• Concentrations of boron, cobalt,
iron, manganese, strontium, sulfate, and
TDS in groundwater exhibit decreasing
trends from the AAB to clowngradient areas
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in the shallow and deep flow zones. Trends
for the bedrock flow zone are not apparent
due to lack of continuous data along the
transect.
• Concentrations of arsenic, radium,
thallium, and vanadium in groundwater are
all less than the 02L Standards, IMACs, or
BTVs in all flow zones, with the exception of
one location within the waste boundary with
a thallium mean concentration greater than
the IMAC.
Groundwater Trends for the AAB West
transects:
• Concentrations of arsenic, lithium,
vanadium, and strontium in groundwater
decrease significantly from ash pore water
(source area) in the AAB to downgradient
areas in all flow zones.
• Concentrations of cobalt, iron,
manganese, and radium in groundwater are
greater in downgradient areas in all flow
zones compared to concentrations in ash
pore water (source area).
• The transport trends for manganese
and cobalt are comparable, and similar to
that of iron. This could indicate the
concentrations of manganese, iron, and
cobalt downgradient are controlled by
dissolution of cobalt -bearing manganese and
iron minerals.
DEQ Comment 3.
Figures 5-4a, 5-4b, 5-4c
This comment is acknowledged.
Figure 6-18a, 6-18b, 6-18c
The flow conditions to and adjacent to Suck
Creek have been refined due to the
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Contaminated GW[41 occurs in numerous
installation of additional wells in the area
shallow and deep wells adjacent to the dam
Section 5.1.1
and updated water level data. Refined water
at Suck Creek. GW flow here is from the
level maps for the shallow, deep, and
ash basin towards Suck Creek, a perennial
bedrock flow layers using April 2019
stream. However, based on shallow, deep,
groundwater and surface water elevations
and bedrock potentiometric contours (shown
are presented as Figures 5-4a, 5-4b, and
in figs. 6-16, 6-18, and 6-20, respectively),
5-4c in the CAP Update. The area of
contaminated GW appears to at least
underflow of Suck Creek has been defined
partially underflow the creek and move
and is incorporated into the refined CSM
toward the higher order, more distant Broad
presented in the CAP Update.
River (a condition that is not surprising in
the Piedmont -Mountain Physiographic
Groundwater in the shallow flow layer
Province). No mention of underflow or its
discharges to the creek from both the west
potential is made in the CSA. Instead, the
and east sides of the creek, while
CSA seems to suggest that all contaminated
groundwater in the deep and bedrock flow
GW from the eastern side of Suck Creek
layers flows under the creek and continues
discharges to Suck Creek, and all GW from
to the north/northwest toward the U1-4 AB
the western side of Suck Creek also
area.
discharges to Suck Creek. This is a limited
read of site conditions according to the
Boron isoconcentration figures for the S, D,
potentiometric maps and vertical gradient
and BR layers (Figures 6-18a, 6-18b, and
data near Suck Creek here[51.
6-18c) show boron concentrations below the
02L standard beyond Suck Creek but do not
show concentrations greater than the
standard to the west of Suck Creek
indication the bulk of COI movement is
limited to the east of Suck Creek.
' Examples include CCR-9D (B = 1020, SO4 = 594, TDS = 940); MW-8D (Fe= 33,400, Mn= 5360); GWA-39S (B = 1620, Co= 31.7, Fe= 22,300, Mn= 6310, V = 3.3);
include GWA-20D (B = 817, Co= 81, Tl= 0.57); etc. Note that GWA-20S has much lower boron suggesting that a deeper flowpath may be transporting the bulk of
contamination here.
5 A relatively minor downward vertical gradient of 0.2 ft/ft was measured at well nests MW-8S/MW-8D and GWA-20S/GWA-20D beside Suck Creek that show a
slight downward gradient from the shallow to the deep flow system.
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A slight downward vertical gradient exists at
MW-8S/D in (0.13 ft/ft) Q1 2019 sample
event) between the shallow and deep flow
layers indicating downward flow between
these layers at this location. However, the
vertical gradient between MW-20D and MW-
20DR was upward (0.19 ft/ft) indicating
discharge from the lower bedrock layer into
the overlying deep layer. This upward flow
from the bedrock into the overlaying deep
layer is consistent with the CSM for a
location like MW-20 where flow from lower
layers would be expected to discharge in an
upward direction as flow emerges at the
downstream toe of the embankment.
DEQ Comment 4.
Figures 5-4a/b/c
This comment is acknowledged.
WL was not measured in anywhere along
Suck Creek during the synoptic round of WLs
Water elevations were surveyed at multiple
used to create the potentiometric maps.
locations during the April 2019 water level
This is an important omission and limits the
Section 5.1.1
gauging event.
understanding of GW movement at the very
local scale along the creek. This is
Boron concentrations on the east and west
important because any proposed remedy, if
side of Suck Creek were considered when
needed, must be based on an understanding
assessing the potential of flow under the
of local contaminant flow directions and
creek.
where the contaminants are discharging
(local stream or more distant river). To help
Figure 1-2
Monitoring wells GWA-57S/BRU/BR were
assess flow conditions along Suck Creek,
installed approximately 200 feet northwest
boron concentrations in this area need to be
of SW-SC-5. This information, along with
evaluated (both sides of Suck Creek), and
additional updated relevant site information,
an additional well nest installed about 200 ft
into the updated flow and transport model
NW of SW-SC-5.
which was used to develop the proposed
active remedial action in the AAB source
area.
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DEQ Comment S.
Section 5.1.1
This comment is acknowledged.
The description of contaminated GW was
focused mostly on simply summarizing the
The CAP presents a comprehensive
mapped and tabled data. Very little
understanding of the results of the
interpretation was provided to explain the
investigations performed at the site,
source of or reason for the observed
including the elements required by 02L
concentrations in different areas within and
.0106. The CAP Update also identifies the
surrounding this source area, whether of
sources at the site, including the AAB, and
ash, pore water, or upgradient or overlying
contains sufficient interpretation of the site
contaminated units. One contaminant cross
data to develop a corrective action plan.
section map was provided for this 14-acre
area (K-K, figs. 11-91 to 11-105) and it
Based on an evaluation of data in the CSA
showed concentrations of boron in the deep
and data collected subsequent to the CSA,
unit near the dam to Suck Creek but much
the source of the observed concentrations
lower concentrations in shallow and deep
and the exceedances of comparison criteria
GW immediately upgradient. No explanation
at or beyond the compliance boundary in the
was provided for the source or origin of the
AAB and in the region adjacent to the AAB is
deep boron. Pore water was not used to
a result of combined impacts from the both
explain the downgradient concentrations and
active ash basin porewater and the
movement of contamination.
porewater concentrations from ash in in the
Figures 6-18a, 6-18b, 6-18c
AAB.
The physical settings of the ash basins are
flow -through water systems with
groundwater migration into the upgradient
ends, flowing laterally through the middle
regions, and migrating downward near the
dams. Near the AAB dams, vertical hydraulic
gradients, imposed by hydraulic pressure of
basin water, promote downward vertical
gradients into the groundwater system.
Beyond the dams, groundwater flows
upward toward Suck Creek and the Broad
River. Generally, the physical setting of the
ash basins within a perennial stream valley
limits the horizontal and vertical migration of
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constituents to areas near and directly
downgradient of the basins' dams. The
primary flow path of the groundwater
remains in the basins' stream valley system.
Therefore, areas upgradient and side -
gradient of the basins have groundwater
divides that limit groundwater flow in these
directions.
Monitoring wells GWA-20S/D/BR are
installed in the AAB upstream dam. Figures
in the CSA Update show the boron
concentrations through for the S, D, and BR
layers (CSA Figures 11-6, 11-7, 11-8).
Those figures show boron concentrations in
the D layer at GWA-20D to be 817pg/L,
which is greater than the concentrations in
GWA-20BR at 257pg/L.
The mean boron concentrations for boron in
GWA-20 presented on CAP Update Figures
6-18a, 6-19b, and 6-18c are:
• GWA-20S - 283 fag/L
• GWA-20D - 921 pg/L
• GWA-20BR - 258 pg/L
These figures present isoconcentrations for
boron at the site and in general show boron
concentrations to be greater in the shallow
and deep layers when compared to the
bedrock layer in the BR layer in the area
near this dam.
Groundwater in the deep and bedrock flow
layers underflows the current, redirected
Suck Creek channel northwest of the AAB
Figures 5-4a, 5-6, and 5-7
upstream dam and flows toward the U1-4 AB
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before discharging to the Broad River.
Shallow groundwater discharges to Suck
Creek from the east and west (Figure 5-
4a). Figure 5-6 depicts a cross -sectional
view of the AAB upstream dam area with
groundwater elevations gauged during the
April 2019 comprehensive groundwater
gauging event. Based on these groundwater
and surface water elevations, groundwater is
controlled by Suck Creek in the shallow flow
layer and does not flow under the creek
from the AAB under the creek to the
northwest.
To further assess the groundwater flow and
COI transport at the AAB upstream dam,
recent boron concentrations and generalized
vertical gradients were plotted in each flow
layer (Figure 5-7). Boron is reported
primarily in the deep and bedrock flow layers
in the monitoring wells west of Suck Creek
(GWA-33BR, GWA-57BRU/BR, GWA-58BR,
and GWA-62BRU/BR) and not in the shallow
flow layer except for GWA-43S. These boron
concentrations do not appear to be
originating from the southwest in the area of
the GWA-60, GWA-61, GWA-44, and MW-23
well clusters, which do not have the same
elevated boron signature. GWA-44BR in the
bedrock flow layer does have boron reported
at a concentration (55 ug/L) slightly greater
than the background value (50 ug/L), but
the MW-23 well cluster is located between
GWA-44BR and the AAB indicating the
source of boron in this well is not the AAB.
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The potential for pore water to contribute to
the underlying groundwater system is
discussed for each source area in the CAP
Update in the section titled Saturated Ash
and Groundwater. These sections also
contains discussions of the behavior, extent,
and movement of COIs.
DEQ Comment 6.
Figure 5-4a
This comment is acknowledged.
It appears that GW near the dam to Suck
Creek has a component of flow to the NE
Interpreting the hydraulic gradient direction
(roughly parallel to the dam) based on the 3
and groundwater flow direction requires
ft difference in shallow WLs measured
more than two data points. Although the
between MW-8S (-730 ft asl) and GWA-20S
hydraulic head is higher at MW-8S than
(-727 ft asl) located about 75 ft away. The
GWA-20S, the predominant shallow
potentiometric maps in Figs. 6-16 and 6-18
groundwater flow direction based on the
do not reflect this. This is important
data from those wells and the surrounding
because there is a lack of shallow and deep
wells in this area is toward the northwest,
wells to the NE, and lack of bedrock wells in
Figure 1-2
toward Suck Creek.
The horizontal extent of shallow, deep, and
general, which limits the ability to
understand GW contamination and
bedrock groundwater impacts are presented
movement in and from this area. While this
on the isoconcentration figures in the CAP
area is within the compliance boundary,
Update.
contaminated GW discharge may not cause
28 exceedances for certain corrective
Additional monitoring wells GWA-59S/D/BR
actions so an understanding of contaminant
were installed on the eastern side of Suck
conditions in this area is needed.
Creek, north/northeast of CCR-9D.
Only one bedrock well (GWA-20BR) is
Monitoring wells GWA-57S/BRU/BR were
positioned to assess contamination in or just
installed on the western side of Suck Creek,
downgradient of this area and it contains
Figures 6-18a through 6-24c
north of GWA-42S and were used with
boron at 257 (meaning that ash leachate is
existing wells to refine the extent of COIs in
migrating at depth) along with 2L
the S, D, and BR layers in this area.
exceedances of Fe and Mn. Only one deep
well (and no shallow well) is positioned in
Additionally, these wells were used, in
the downgradient NE direction (CCR-9D),
conjunction with existing wells to refine the
and it contains 2L exceedances for B, SO4,
groundwater flow direction in this area. The
and TDS data for other COIs were not
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reported for this well so exceedances could
Figures 5-4a, 5-4b, 5-4c
comment describes component of flow to the
not be determined). The horizontal extent
NE, roughly parallel to the dam.
of shallow and deep contamination and to
The flow directions inferred from the
some extent bedrock contamination to the
information shown on Figures 5-4a, 5-4b,
NE has not been defined here. Potential
and 5-4c do not show flow in this direction.
underflow of contaminants may be
monitored partially by wells on the western
All available data through June 31, 2019
side of Suck Creek, which include GWA-
from GWA-40S and AB-2BRO are included in
33S/D/BR (shallow unit Co, Fe, and Mn
the Appendix C Tables. The wells are
2L/IMAC), GWA-43S/D (shallow V exceeds
included in report figures and water level
2L/IMAC), and GWA-42S (all reported COIs
maps.
appear to be below 2L/IMACs). However,
the positioning of these wells does not
The understanding of flow under Suck Creek,
account for flow that appears to be moving
Section 5.1.2.1
and its implications in terms of groundwater
in a more northerly direction. It is
quality, fate and transport, and remediation,
recommended that a nested set of wells be
is presented in CSA Update Section
installed and sampled on the eastern side of
5.1.2.1.
Suck Creek N-NE of CCR-9D and a nested
set of wells on the western side of Suck
Creek about 200 to 300 ft north of GWA-
425; it is recognized that the terrain is
rugged along Suck Creek in this area so this
fact would need to be considered when
choosing the location. (GWA-40S and AB-
2BRO were both missing from the master
dataset provided in Appendix B and from the
WL maps in the report figures and from the
mapped depiction of shallow boron
contamination; and well GWA-39S (boron =
1620 ug/L) was missing from the boron
map. If an appropriate well nest location is
not possible due to problems with drill rig
access, the project team needs to discuss an
alternate approach to understanding the
extent of GW contamination and its
movement from this area. The goaLshouldj
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be to first determine the extent of the
problem and whether GW restoration is
needed in this area. If it is, a better
understanding of local conditions will be
needed for CAP design, including
understanding and defining the horizontal
extent of shallow and deep contamination in
this area, the local GW flow directions, and
the extent to which underflow of Suck Creek
is occurring and the expected discharge
location of any underflow.
DEQ Comment 7.
Section 6.1.3
This comment is acknowledged.
The CSA states that Co, Fe, Mn, and Sr are
being considered for MNA in the CAP for the
The COIs associated with the AAB and ASA
Active West source area. The CSA needs to
have been refined in the CAP Update using
state how these and only these constituents
the COI Management Process described in
were selected for consideration.
Table 6-6
the CAP Update report. Section 6.0 of the
CAP Update lists the COIs for corrective
action in the AAB and ASA. These COIs are:
As, B, Co, Fe, Mn, Sr, SO4, TDS, TI, U
(total), and V.
CAP Update Section 6.1.3 describes the
process for evaluating if a COI is to be
retained for corrective action. Table 6-6
presents the COI Management Matrix for the
site COIs. This table presents the COIs
considered and the lines of evidence for
used in the evaluation process.
As a result of the evaluation performed in
the CAP Update, Groundwater Extraction and
Infiltration Wells, is the proposed
groundwater remedial alternative for the
AAB and the ASA.
DEQ Comment 8.
Figure 1-2
This comment is acknowledged.
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An additional "2L-2B" surface water
sampling location is needed approximately
Appendix C, Table 2
Surface water sample location SW-SC-06A
150 ft downstream of SW-SC-6 to account
was be collected in June 2019 from Suck
for the GW flow directions inferred by the
Creek approximately 150 ft downstream of
potentiometric mapping in fig. 6-16.
SW-SC-06. The sampling and analyses were
Sampling and analysis should be carried out
completed in accordance with the referenced
as outlined in the report titled "SW Sampling
report. The findings of surface water
to Assess 15A NCAC 2B Compliance for
sampling were submitted to DEQ in March
Implementation of Corrective Action Under
2017. The report found that groundwater
15A NCAC 02L .0106" (Synterra, March
migration from the ash basin source area
2017).
has not resulted in violations of the 15 NCAC
02B surface water quality standards in either
the Broad River or in Suck Creek.
DEQ Comment 9.
Appendix G
This comment is acknowledged.
An assessment is needed of the potential
impact on the leaching of saturated ash due
The flow and transport model is currently a
to creek stage fluctuations and (or) GW level
steady state model using hydraulic head
fluctuations.
averages. For future evaluations, historical
water levels within ash basin monitoring
wells and monitoring wells adjacent to the
ash basins can be evaluated to determine
the maximum hydraulic head. Given that
heavy storms can result in pronounced
temporary groundwater level increases
(which are dependent upon the rain event,
local geology, topography, spatial extent and
geomorphic setting of any engineered cap,
and proximity to surface waters) which can
potentially reverse the local head gradients.
The flux of the river stage would have a very
little impact on the hydraulic heads within
the ash basins at Cliffside and are mostly
affected b roundwater fluxes.
SOUTHACTIVE —
The "Active South" source area is defined
11 here as the southernmost portion of the
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active basin that discharges to Suck Creek in
the area west of GWA-47D and GWA-27.
This area of GW discharge to Suck Creek is
farther south than the area referred to as
"Active West" that discharges along the
southern dam to Suck Creek. As defined,
this source area is about 15 acres in size
and, in very general terms, is bounded to
the south by CLMW-6, to the east by a
location just west of AB-5, and to the north
by a location about 200 ft south of AB-3.
Like source area "Active West', this source
area is somewhat unique because its
compliance boundary extends beyond a
major SW drainage feature - Suck Creek -
that is a Class WS-IV water of the state. So
while GW contamination may or may not
extend beyond the compliance boundary in
this area, contaminated GW discharge to
Suck Creek must not cause exceedances of
the SW standards for certain corrective
actions to be allowable.
DEQ Comment 1.
Figure 6-5
This comment is acknowledged.
The geology is not mapped in this area. No
geologic cross section is provided. Based on
The CAP presents a comprehensive
boring logs, the areas near GWA-27DA and
understanding of the results of the
CCR-15D appear to have no shallow flow
investigations performed at the site,
unit due to pinch out, and only the deep and
Figure 5-4a
including the elements required by 02L
bedrock units exist here. However, the
.0106. The CAP Update also identifies the
potentiometric maps in figs. 6-15 and 6-16
sources at the site, including the AAB in this
do not reflect this fact. The shallow
region, and contains sufficient interpretation
potentiometric maps depict WL contours in
of the site data to develop a corrective
this area which is not possible if the unit
action plan. A geologic cross-section (N-N')
does not exist. Geologic mapping,
was constructed and presented in the CAP
contaminant cross section mapping, and
Figures 6-11a, 6-11b, 6-11c
Update (Figure 6-5).
corrected potentiometric mappingis needed
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for this source area and needs to include
Water level maps were revised and included
geologic and contaminant information from
in the CAP Update. The shallow water level
locations at CLMW-6, AB-6, CCR-16, GWA-
figure (Figure 5-4a) was revised to reflect
27, and others as appropriate.
the absence of shallow flow in the areas near
GWA-27DA and CCR-15D. Updated
potentiometric maps and isoconcentration
maps are also included in the CAP Update
and include data from the referenced wells.
Contaminant cross-section mapping of
cross-section N-N' is presented as Figures
6-11a 6-11b 6-11c in the CAP Update.
DEQ Comment 2.
Figures 5-4a/b/c
This comment is acknowledged.
The GW flow direction is unclear near GWA-
27DA, CCR-14D, and CCR-13D where, based
Table 5-1
A synoptic round of water level
on topography, movement would appear to
measurements was made in April 2019 in
be either to the NW toward the dam at Suck
Figure 6-18b
the area in question, southwest of the AAB.
Creek or to the SW directly to Suck Creek.
The potentiometric surface for the S, D, and
The potentiometric contours in fig. 6-18 are
BR layers on CAP Update Figures 5-4a, 5-4b,
too widely spaced to understand the
and 5-4c were developed from those
direction of local GW flow here. A number of
measurements.
deep wells were not measured during the
synoptic WL event in Feb 2017 (e.g. GWA-
These updated potentiometric maps show
46D, MW-7D, and GWA-27D). The use of all
the inferred groundwater flow direction to be
deep wells would have provided a better
towards Suck Creek and not the NW towards
understanding of GW flow directions in this
the dam.
area. This is particularly important since the
shallow flow system apparently does not
The isoconcentration data presented on
exist here and since this area is near the
Figure 6-18b for boron shows the mean
current ash sluice discharge to the active
concentration at GWA-27DA to be 980 pg/L.
basin. It is also important because several
Concentration data and potentiometric data
wells in this vicinity (along the crest) contain
in this area was used in developing the
2L/IMAC exceedances (e.g. CCR-15D CAMA
proposed remedial measures proposed for
contains Mn at 114; GWA-27D contains B at
the AAB.
939, Mn at 1430; GWA-27DA contains B at
927 and Mn at 1350) that may be mi ratin
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to the compliance boundary west of this
Monitoring well GWA-27D did not contain
area. Because of the steep terrain, wells are
any water historically and no groundwater
not installed near the compliance boundary
samples were collected and analytical data is
and adjacent to Suck Creek in this area.
not available for this well. The monitoring
The direction of deep GW flow in this area
well was abandoned and replaced with
will affect any remedial design that may be
monitoring well GWA-27D.
needed here. A synoptic round of WL
measurements need to be made in this area
using all wells.
DEQ Comment 3.
Appendix C, Table 1
This comment is acknowledged.
Boron concentrations in GWA-47D have been
increasing since the well was installed in
It is inaccurate to state: "Boron
April of 2016. GWA-47D is located just west
Figure 5-8a, 5-8b, 5-8c
concentrations in GWA-47D have been
of the southwestern extent of the active
increasing since the well was installed in
basin The CSA does not discuss this or
April of 2016"; that implies that the boron
whether these concentrations are expected
concentrations are still increasing.
to increase above 2L/IMAC standards.
Boron concentrations in GWA-47D did
increase after the first sampling event in
April 20, 2016 (141 ug/L), but reached a
maximum of 399 ug/L in August 2018. The
boron concentration was generally consistent
over the next two sampling events, but
concentrations have decreased during the
last 4 sampling events with the July 2019
concentration reported at 266 ug/L.
Decanting of the AAB began on March 31,
2019. As the elevation of ponded water in
the basin decreases, the hydraulic head
driving groundwater toward the west
towards GWA-47D will also decrease, and
the boron concentrations in this well are
expected to decrease.
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The velocity vector figures support the
prediction that boron concentrations in
GWA-47D will decline post -closure. When
comparing the current velocity vectors
(Figure 5-8a) to the closure -in -place map
(Figure 5-8c), after closure -in -place the
ridge that GWA-47D is located along is
expected to establish itself as a localized
groundwater divide with groundwater to the
east of the ridge flowing to the
east/northeast toward the AAB, and
groundwater to the west of the ridge flowing
toward Suck Creek. The establishment of
this localized divide is not as well defined
when comparing the current conditions to
the closure -by -excavation velocity vectors
Appendix G
(Figure 5-8b), but there is still some
reversal of flow direction in this area under
this closure scenario.
The flow and transport model does not
predict future boron 02L standard
exceedances at monitoring well GWA-47D
under the closure -in -place or the closure -by -
excavation scenario.
DEQ Comment 4.
Appendix C, Table 1
This comment is acknowledged.
Boron concentrations in pore water well AB-
6S have fluctuated sharply up and down
The location of monitoring well A13-6S was
with each sample event (range is 11,300 to
the porewater well located at the closest
2140 ug/L). The CSA does not discuss why
proximity to the inflow of the sluice line into
this is occurring or whether it has
the AAB prior to ceasing flows to the AAB. It
implications for the understanding of other
is to be expected that based on its proximity
pore water concentrations in general across
to the inflow that concentrations reported in
the site.
this well would fluctuate, since plant
operations change over time. The next
closest well to the former inflow location was
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AB-5S. The boron concentrations in this well
fluctuated between approximately 3,000
pg/L and 6,000 pg/L. Not as large a
fluctuation as seen in AB-6S, which is what
would be expected based on its location
proximate to the former inflow location.
Since flows to the AAB ceased and decanting
of the AAB commenced (March 31, 2019)
there has been one sampling event at AB-6S
and AB-5S (July 2019). The boron
concentrations reported in both AB-6S and
AB-5S are close to the lowest concentrations
reported in these wells over the period of
monitoring. These results were reported
after the data cutoff date (June 2019) for
the CAP Update report and are not
presented or included in the assessment
provided in the CAP Update.
DEQ Comment S.
Section 1.5.3
This comment is acknowledged.
While seeps are covered under a temporary
SOC, the data associated with them is very
A Special Order by Consent (SOC) was
useful in determining contaminated GW
issued to Duke Energy on April 25, 2018, to
occurrence and movement. Seeps 528, S-
address the elimination of seeps from Duke
29, 5-30, 5-31, 5-32, and 5-36 all contain
Energy's coal ash basins during the separate
elevated boron (1210 to 1600 ug/L) but
and independent process of ash basin
were not discussed in the CSA.
closure. The SOC provided the definition for
constructed seeps [seeps that (1) are on or
within the dam structures, and (2) convey
wastewater via a pipe or constructed
channel directly to a receiving water] or
non -constructed seeps (seeps that do not
meet the "constructed seep" definition). Ash
basin decanting is expected to substantially
reduce or eliminate discharge from the
seeps near the AAB.
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The SOC requires Duke Energy to accelerate
Tables 6-8, 6-23, and 6-34
ash basin decanting. After completion of
decanting, remaining seeps, if not
dispositioned in accordance with the SOC,
are to be characterized. After post -decanting
seep characterization, an amendment to the
CAP and /or Closure Plan may be required to
address remaining seeps. The SOC
terminates 180 days after decanting or 30
days after approval of the amended CAP.
AAB decanting began on March 31, 2019.
The SOC requires completion of decanting of
the AAB by March 31, 2020.
Seeps that have been identified for potential
corrective action are identified on Tables 6-
8 6-23 and 6-34.
DEQ Comment 6.
Appendix G
This comment is acknowledged.
An assessment is needed of the potential
impact on the leaching of saturated ash due
The flow and transport model is currently a
to creek stage fluctuations and (or) GW level
steady state model using hydraulic head
fluctuations.
averages. For future evaluations, historical
water levels within ash basin monitoring
wells and monitoring wells adjacent to the
ash basins can be evaluated to determine
the maximum hydraulic head. Given that
heavy storms can result in pronounced
temporary groundwater level increases
(which are dependent upon the rain event,
local geology, topography, spatial extent and
geomorphic setting of any engineered cap,
and proximity to surface waters) which can
potentially reverse the local head gradients.
The flux of the river stage would have a very
little impact on the hydraulic heads within
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the ash basins at Cliffside and are mostly
affected by groundwater fluxes.
DEQ Comment 1.
Appendix A
This comment is acknowledged.
Section 1.5 (Previous Submittals) on p. 1-7
lists the four reports submitted to date for
Appendix A in the CAP Update provides
Cliffside. For completeness, this section
regulatory correspondence documents
should also reference and include in an
between Duke Energy and NCDEQ.
Appendix the review comments provided by
the Division for these documents.
DEQ Comment 2.
Sections 6.1, 7.1, and 8.1
This comment is acknowledged.
Additional details on individual source areas
are needed. Sections 2.0 (Site History and
The CAP Update provides detailed
Description) and 3.0 (Source Characteristics)
information regarding each source area
describe information related to each source
including history and description of the
area, but the information lacks details and
waste material and chemistry of the waste
specificity. Page 2-2 states that "This ash
Appendix B, Figure 1
material for each source area. Additional
storage area was probably created when ash
information on the source areas may be
was removed from the active ash basin....',
found in Rogers Energy Complex - Cliffside
and "The eastern portion of the ash storage
Steam Station Active Ash Basin - Closure
area may be a spoils area..... ". It is
Options Analysis - Summary Report
expected that as -built drawings, historic
(AECOM, 2018) and Rogers Energy Complex
topo maps, and disposal records be used to
- Cliffside Steam Station Unit 5 Inactive Ash
define and map the expected extent, depth,
Basin - Closure Options Analysis - Summary
and volume of ash and saturated ash at each
Figures 6-6 and 6-67
Report (AECOM 2018).
individual source area.
Ash thicknesses are presented on isopach
figures (Appendix B, Figure 1). These
figures depict approximate ash thicknesses
across the ash basins and ASA derived by
comparison of elevations between the
existing top of ash from the 2015
topographic and bathymetric surveys with
pre -development topography based on
historical USGS topography. The iso ach
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figures were used to refine the ash
thicknesses presented in cross -sections.
Current conditions saturated ash thicknesses
figures are presented as Figures 6-6 and 6-
67.
DEQ Comment 3.
Sections 6.1.1.6, 6.10.1.6, and 6.19.1.6
This comment is acknowledged.
On p. 3-9, the report states that SPLP
testing was conducted on ash from six
Appendix C, Table 6
SPLP results per basin are found in CAP
locations but no details were provided.
Update Sections 6.1.1.6, 6.10.1.6, and
Results were generalized but were not linked
6.19.1.6 and by sample location are
to individual basins, well IDs, or sample
presented in the CAP Update in Appendix C,
depths. Need discussion, by source area, of
Table 6.
results, spatial variability, and comparison to
downgradient contamination.
The SPLP method (EPA Method 1311) was
developed to evaluate the effects of leaching
of wastes due to acid rain conditions. The
test is performed on a 100 gram solid
sample at a 20:1 liquid to solid ratio. The
sample is subjected to rotary agitation at 30
rpm for 18 hours to develop the leachate.
These laboratory conditions are not directly
applicable to conditions in the ash basins or
in the ash storage area. While interesting to
review, the data are not useful in relating
leaching behavior of ash in the ash basin
and ash storage area, therefore no
discussion of the data is presented. The
referenced sections also discuss the LEAF
leaching that was performed on ash
samples.
The CAP presents a comprehensive
understanding of the results of the
investigations performed at the site,
including the elements required by 02L
.0106 and the requirements of the DE CAP
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Guidance (Corrective Action Plan Content for
Duke Energy Coal Ash Facilities, April 27,
2018) and contains sufficient interpretation
of the site data to develop a corrective
action plan.
DEQ Comment 4.
Sections 6.1.1.6, 6.10.1.6, and 6.19.1.6
This comment is acknowledged.
The chemistry of ash pore water was not
evaluated by source area for spatial and
Chemistry of ash porewater per source area
temporal variability or compared to
is presented in the CAP Update Sections
downgradient contamination. On p. 3-10,
6.1.1.6, 6.10.1.6, and 6.19.1.6.
the report stated vaguely that "The pore
water sampling results show fluctuating
A discussion by source area of the COI
concentrations for some constituents in
extent per source area is presented in the
some wells" but details (well IDs, basins,
CAP.
etc) were not provided. Need discussion, by
source area, of pore water results, spatial
variability, and comparison to downgradient
The CAP presents a comprehensive
contamination.
understanding of the results of the
investigations performed at the site,
including the elements required by 02L
.0106 and the requirements of the DEQ CAP
Guidance (Corrective Action Plan Content for
Duke Energy Coal Ash Facilities, April 27,
2018) and contains sufficient interpretation
of the site data to develop a corrective
action plan.
The potential for pore water to contribute to
the underlying groundwater system is
discussed for each source area in the CAP
Update in the section titled Saturated Ash
and Groundwater. These sections also
contains discussions of the behavior, extent,
and movement of COIs.
DEQ Comment S.
Figure 1-2
This comment is acknowledged.
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For the active basin, it is expected that the
Figure 6-14, 6-15a, 6-15b, 6-16
The flow and transport model is currently a
dynamic nature of ash and stormwater input
steady state model using hydraulic head
to the basin be discussed along with any re-
Figure 6-4
averages. As the ash basin is designed to
location of large amounts of ash from or
discharge stormwater, the impact to
within the basin (locations, amounts,
adjacent groundwater elevations due to
timing). One sentence was provided (p. 3-
relatively brief changes in basin water levels
2) to describe the movement of a large
would be expected to be minimal. CAP
amount of ash from one location to another
Update section 6.1.1.8 discusses decanting
location within the active ash basin; details
of the AAB. Selected well locations were
were not provided.
instrumented with pressure transducers
(Figure 6-14) to monitor the effects of
basin decanting. Figures 6-15a, 6-15b, and
6-16 plot the water levels of the
instrumented wells along with rainfall data.
These graphs show the water levels in the
wells are relatively insensitive to rainfall.
The footprint of the ash stockpile located
within the footprint of the AAB is identified in
plan view on Figure 1-2.
The ash stockpile is depicted on cross
section K-K' on Figure 6-4.
The ash stockpile has been identified as a
continuing source of COIs contribution to
groundwater and has been accounted for in
the flow and transport model. Flow and
transport modeling has shown that this area
is a continuing source of COIs to the
groundwater which has resulted in proposed
active remedial action in the ash storage
area at the AAB compliance boundary.
DEQ Comment 6.
Sections 6.1.1.6, 6.10.1.6, 6.19.1.6
This comment is acknowledged.
Page 2-6 states that "Information to date
indicates that the thickness of soil impacted
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by ash would generally be limited to the
The CAP Update data indicate unsaturated
depth interval near the ash/soil interface"
soil COI concentrations at or beyond the
but no reference or basis for the statement
compliance boundary are generally
is provided. Need basis (data, locations) for
consistent with background concentrations
the statement.
or are less than regulatory screening values
(Table 6-2).
Saturated soil and rock is considered a
component of the groundwater flow system.
The potential leaching and sorption of
constituents in the saturated zone is
included in the flow and transport and
geochemical model evaluations (Appendix
G and H).
Soil COI extent are presented by source area
in the CAP Update. The section discussing
soil beneath ash for the AAB ash is found in
Section 6.1.1.6. Corresponding discussions
would be found in the corresponding section
numbers for the other two source areas.
DEQ Comment 7.
Sections 6.1.1.3, 6.10.1.3, and 6.19.1.3
This comment is acknowledged.
The amount of ash in each source area was
estimated (p. 3-2, 3-3, 3-4) but the basis for
The volume of source material and the basis
the estimates was not provided. Need basis
for these estimates are provided by source
for estimates. In addition, the amount of
area in the CAP Update in sections titled
ash was stated in terms of "tons" at the
"Volume and Physical Horizontal and Vertical
active basin, unit 5 basin, and units 1-4
Extent of Source Material". For the AAB this
basin, but was stated in terms of "cubic
is in section 6.1.1.3. Corresponding
yards" at the ash storage area. Please
information would be found in the
explain the difference in units.
corresponding section numbers for the other
two source areas.
These volumes are pr vided in cubic yards.
DEQ Comment S.
Table 3-1
This comment is acknowledged.
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Section 2.3 (CAMA-related Source Areas) on
Table 3-1 lists and provides a brief
p. 2-5 omits the raw coal piles as a source
description of the CAMA-regulated units and
area.
other facilities at the site not part of the
source areas addressed in the CAP Update.
The coal pile is listed as an additional onsite
source area. The coal pile is being assessed
under a separate timeline with a CSA due to
NCDEQ by March 31, 2020 as confirmed by
correspondence from DEQ to Duke Energy
dated April 5 2019.
DEQ Comment 9.
Section 5.0
This comment is acknowledged; however,
The active ash basin is divided into two
the following exception is noted.
source areas (south dam area and north
Section 6.2
dam area) but needs to be divided into three
The conceptual site model (CSM) is
source areas (active N, active W, and active
presented in CAP Update Section 5.0. The
SW) due to different discharge areas into
CSM presents the descriptive and illustrative
which each flows.
representation of the hydrogeologic
conditions and COI interactions specific to
the Site.
The AAB is divided and discussed from
source area to receptor pertaining to
groundwater COI extent; however for
purpose of corrective action, the CAP Update
considers the AAB and the ASA as a single
combined source.
The major flow paths include: from the east
side of the AAB through the downstream
dam to the Broad River, from the ash
stockpile to the north through the ASA and
to the Broad River, from the northwest
portion of the AAB through the upstream
dam and to and beyond Suck Creek, and
from the southern portion of the AAB to
Suck Creek.
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DEQ Comment 10.
Figure 1-2
This comment is acknowledged.
On page 2-7 the report states that "an area
of exceedances was identified that appears
The sampling plan for the Unit 6 source area
not to be associated with the CAMA-related
was discussed with NCDEQ. Groundwater
source areas. This area is located east of
monitoring wells GWA-60S/D/BR, GWA-
Unit 6 and west of Suck Creek. " Because
61S/D/BR, and GWA-62S/D/BR were
this area may contain CCRs that intermix
installed and sampled and soil samples
with CCR contamination at Units 1-4 basin, it
collected from the well borings to assess the
needs to be assessed as its own source area
horizontal and vertical extent of the Unit 6
and on schedule with the upcoming CAP. It
Appendix A
source area.
is requested that assessment sampling
locations be proposed by letter within 14
Per the April 5, 2019 letter from NCDEQ to
days of receipt of these comments.
Duke Energy, and the need to install the
monitoring wells previously referenced, the
CSA for the Unit 6 source area is on a
separate schedule from the CAP Update
submittal (Appendix A).
DEQ Comment 11.
Appendix A of:https://www.duke-
This comment is acknowledged.
Section 4.0 (Receptor Information) states
energy.com/ /media/pdfs/our-
that "The dams contain engineered drainage
company/ash-management/193312/cliff-
The dam design drawings show that the
hist-con.pdf?la=en
features associated with dam drainage and
embankments for the AAB and the U5 AB
stability. These features are internal or
use granular drainage blankets. These are a
adjacent to the dams and are not included in
common feature of earthen embankments
the underground utility mapping." Need
and are located internal to the earthen
mapping of any features that are saturated.
embankment and do not directly discharge
to the surface. These features are
accounted in the flow and transport model.
The drawings showing these features can be
found in the report found at the following
link:
Appendix A of: https://www.duke-
energy.com/ /media/pdfs/our-
company/ash-management/193312/cliff-
hist-con.pdf?la=en
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DEQ Comment 12.
Figure 5-9
This comment is acknowledged.
Page 4-4 states that "Several surface water
bodies that flow toward the Broad River
The surface water features within 0.5-mile
were identified within a 0.5-mile radius of
radius of the ash basin pre-2018 compliance
the ash basin pre-2017 compliance
boundaries are presented on Figure 5-9.
boundaries. " The specific number of surface
waters needs to be stated, and a map
Approximately 11 wetland areas, 13
depicting these surface waters needs to be
streams, 1 creek, and 2 rivers are located
provided and referenced in this section.
within 0.5-mile radius of the ash basin pre-
2018 compliance boundaries
DEQ Comment 13.
Sections 6.2, 6.10, 6.19
This comment is acknowledged.
Unsubstantiated statements were used to
make the case that local supply wells have
The CAP Update provides an updated
not been impacted by coal ash. For
evaluation of analytical results in samples
example, the CSA states on page 4-9 that
collected from private water supply wells
"The water chemistry signature of the water
near CSS. This evaluation is presented in
supply wells with available water chemistry
CAP Update Sections 6.2.2 (AAB and ASA),
data is similar to the background bedrock
6.10.2 (U1-4 AB), and 6.19.2 (U5 AB). A
well data at the Site, indicating that these
well -by -well summary of COI exceedances
wells reflect natural background conditions."
and characterization is provided in CAP
On page 12-7, it states that "there are no
Update Table 6-9.
indications that potential risks to off -site
residences exposed to groundwater exist".
The findings of the water supply well
On page 14-24 it states that "these [private
evaluation found that no private drinking
supply] wells reflect natural background
Table 6-9
water wells are impacted by COIs
concentrations..." On page 12-6 it states
attributable to the CSS ash basins.
that "Recent (2016-2017) analytical results
In addition the review of current and historic
from off -site water supply wells indicate that
results from off -site water supply wells,
constituent concentrations are less than 2L
predictive flow and transport modeling found
or less than PBTVs for site groundwater,
that Site -related COIs will not affect off -Site
with the exception of four vanadium
water supply wells. Using empirical Site
detections". However, the Appendix B table
data, groundwater flow and transport
modeling simulations support roundwater
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shows many more exceedances6. On page
flow is away from water supply wells and
14-24 it states that "these [private supply]
that there are no exposure pathways
wells reflect natural background
between the groundwater flow -through the
concentrations..." Need discussion that
ash basin and the pumping wells used for
consolidates information needed to make the
water supply in the vicinity of the Cliffside
case that private supply wells are not
site.
impacted by CCR (see General comment
30).
Domestic and public water supply wells are
outside, or upgradient of the groundwater
flow system containing the ash basins and
ASA. Domestic water supply wells are not
affected by constituents released from the
ash basins or ASA or by the different closure
options, according to groundwater flow and
transport model simulations.
Based on predicted groundwater flow
patterns, under post ash basin closure
conditions, and the location of water supply
wells in the area, groundwater flow direction
from the ash basins is expected to be further
contained within the stream valley and
continue flowing north of the ash basin
footprints, and therefore will not flow
towards any water supply wells.
As indicated on Table 6-9 (Water Supply
Well Analytical Results Summary),
groundwater exceedances reported in water
supply wells were within or less than the
constituent background ran e and/or the
6 Many of the exceedances are for wells sampled in 2014 or 2015 which also need to be considered. A total of 26 supply wells could not be assessed for
vanadium due to a lab detection limit above the vanadium IMAC/BTV. One well exceeded the BTV for strontium. And four wells exceeded the 2L/BTV for
manganese.
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property has been connected to the
municipal water supply.
Additionally, groundwater geochemical
evaluations were conducted on the water
supply wells and were compared to
upgradient, within and downgradient of
sources. There are 10 water supply wells
having a 02L exceedance for either one or
more of the constituents iron, manganese,
strontium and vanadium. Nine of wells plot
within the generally unaffected range for
upgradient, within and downgradient
sources. This comparison indicates that the
groundwater supply wells are not impacted
by the AAB or ASA.
DEQ Comment 14.
This comment is acknowledged.
Page 4-8 states that "downgradient bedrock
monitoring wells GWA-21BR and MW-
Sections 6.1.2
The conservative COIs identified at the site
20DR.... plot along with background wells BG-
(boron, lithium, sulfate, TDS) have been
1BR, MW-24DR, and MW-32BR indicating
used as tracer constituents when
these downgradient wells are likely
determining if groundwater near the ash
representative of unimpacted groundwater
basins is impacted from the source areas.
within the bedrock flow layer." This
These constituents have been mapped and
interpretation is incorrect. These wells are
used in the COI management process in
not "unimpacted" (GWA-21BR has boron at
determining horizontal and vertical extent of
100 ug/L and MW-20DR has boron at 170
ash basin impacted groundwater at the site,
ug/L). If boron in a well is present above its
including assessing the flow under Suck
BTV, the well is not "unimpacted"by coal
Creek emanating from the AAB at the
ash. This comment applies to all wells
upstream dam.
across the facility.
As noted on CAP Update Figures 6-18a, 6-
18b, and 6-18c boron is present at
concentrations above the BTV of 50 pg/L in
both GWA-21BR 133 /L and MW-20DR
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(442 pg/L). However, these concentrations
are below the 02L standard.
DEQ Comment 15.
This comment is acknowledged.
Page 4-9 states that "A more thorough
Sections 6.1.2.1, 6.10.2.1, and 6.19.2.1
evaluation of Piper diagrams related to ash
Piper diagrams comparing porewater,
pore water, downgradient groundwater, and
groundwater downgradient of the source
background conditions is provided' in a later
areas, and background water are discussed
section of the report. It would be more
in CAP Update Sections 6.1.2.1, 6.10.2.1,
effective to place all Piper narrative in one
and 6.19.2.1 for each of the source areas.
section of the report when making the case
The CAP content was developed to meet the
that pore water, downgradient well water,
requirements of the CAP Guidance
and supply wells have unique signatures.
(Corrective Action Plan Content for Duke
Energy Coal Ash Facilities, April 27, 2018)
issued by DEQ.
Piper diagrams are split out for discussion
purposes due to the quantity of wells located
Sections 6.2.2.2, 6.10.2.2, and 6.19.2.2
on the site. When presenting site data on
Piper diagrams, monitoring wells located on
the geochemical flow transects were
selected for presentation and discussion
purposes because they represent the major
COI transport pathways and are most
representative of the distribution and
movement of COIs on the site.
Piper diagrams comparing porewater,
groundwater downgradient of the source
areas, and water supply well water are
discussed in Sections 6.2.2.2, 6.10.2.2,
and 6.19.2.2 in the CAP Update.
DEQ Comment 16.
Table 5-3
This comment is acknowledged.
Section 4.5 (Surface Water Receptors) on p.
4-9 refers to surface waters at the Cliffside
Surface water classifications are presented
facility in general, and does not discuss the
on Table 5-3.
surface waters that receive dischar e from
Sections 6.2.1, 6.11.1, and 6.20.11
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specific individual source areas. Need
Surface waters are shown on Figure 5-10
surface water mapping by source area along
and are discussed by source area in the CAP
with an indication of the SW classification of
Update in Sections 6.2.1, 6.11.1, and
each surface water. Section 4.5 refers to NC
6.20.1.
SW standards but does not reference the
Appendix C, Table 2
table (Appendix B) in which SW results are
Appendix C, Table 2 includes
presented. The table in Appendix B shows
revised/updated surface water standards
SW standards, but some of these are
and surface water sampling results through
incorrect. Aluminum, strontium, antimony,
June 31, 2019. This table includes the
cobalt, thallium, and sulfide have SW
USEPA National Recommended Water
standards that must be met under 28 rules.
Quality Criteria for Protection of Aquatic Life,
Standards for the other constituents need to
Human Health and/or Water Supply.
be re -checked for accuracy.
DEQ Comment 17.
Figures 5-4a, 5-4b, 5-4c
This comment is acknowledged.
Page 5-3 states that "Within a [drainage]
basin, movement of groundwater generally
Refined water level maps for the shallow,
is restricted to the area extending from the
deep, and bedrock flow layers using April
drainage divides to a perennial stream
Figure 6-18a, 6-18b, 6-18c
2019 groundwater and surface water
(LeGrand, 1988), and "Rarely does
elevations are presented as Figures 5-4a,
groundwater move beneath a perennial
5-4b, and 5-4c in the CAP Update. Due to
stream to another more distant stream..."
the installation of additional wells and based
And p. 5-4 re -states this concept by
on review of additional data, The area of
describing the groundwater system as a
underflow of Suck Creek has been defined
"two -medium system restricted to the local
Section 5.1
and is incorporated into the refined CSM
drainage basin." And later, on p. 5-4 the
presented in the CAP Update.
concept is re -stated again by describing that
"in natural areas, groundwater flow paths in
Groundwater in the shallow flow layer
the Piedmont are almost invariably restricted
discharges to Suck creek from both the west
to the zone underlying the topographic slope
and east sides of the creek, while
extending from a topographic divide to an
groundwater in the deep and bedrock flow
adjacent stream." This conceptual
layers flows under the creek and continues
understanding does not match the
to the north/northwest toward the U1-4 AB.
potentiometric contours shown in figs. 6-16,
6-18, and 6-20 that strongly suggest partial
Figures 6-18a, 6-18b, and 6-18c present
underflow of Suck Creek locally. Partial
the mean boron isoconcentrations measured
underflow of lower order streams toward
in groundwater at the AAB and provide a
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higher order streams is not uncommon in
representation of the extent of the underflow
the Piedmont and Blue Ridge settings. This
in the shallow, deep, and bedrock flow
discrepancy between site data
layers. Based on the extent of boron
(potentiometric maps) and theoretical
measured above the BTV (50 pg/L), the
conceptualizations need to be discussed as it
extent of underflow in the bedrock layer is
has a direct bearing on understanding
estimated to be approximately 450 feet
contaminant transport from the active basin.
downgradient towards U1-4 AB from GWA-
33BR, with the extent being less in the
shallow and deep flow layers.
It is recognized that the LeGrand model,
although widely applicable within the
Piedmont physiographic province, has
limitations such as those identified in this
comment. Its applicability and limitations
are discussed in the CSM in CAP Update
Section 5.1.
DEQ Comment 18.
This comment is acknowledged.
Page 6-1 states that "Typically, mildly
productive fractures (providing water to
Mildly productive fractures are defined as
wells) were observed within the top 50 feet
fractures that produce water to wells, but
of competent rock." Discussion is needed to
generally produced at rates less than 1
define "mildly productive" and to describe
gallon per minute (gpm). Packers were used
the data and well IDs used to arrive at this
in the field to isolate sections of bedrock
conclusion. Page 6-1 also states that "The
boreholes, test their yield, and identify
bedrock flow layer ....is characterized by the
fracture zones to estimate flow rates and
storage and transmission of groundwater in
determine if a fracture productive zones was
water -bearing fractures." Because
producing enough water to suitable for
competent bedrock fracture apertures
setting a viable monitoring well. Many
commonly are relatively thin, the storage
fracture zones produced less than 1 gpm
capacity tends to be very low compared to
and were not selected as intervals for well
the storage in the overlying porous saprolite
installations. These were estimates made in
and transition zone material. As a result,
the field and based on relative water
bedrock fractures tend to be conduits rather
production and were not recorded for
than storage reservoirs. This conce t l
uantitative comparisons/evaluation, sim I
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understanding is important to understanding
as a method for attempting to set wells
contaminant transport.
productive enough to sample.
It is agreed that groundwater storage in
bedrock fractures is relatively low compared
to the overlying saprolite and transition
zone, and that bedrock fractures act as more
as groundwater conduits rather than zones
of groundwater storage.
DEQ Comment 19.
Figures 5-4a, 5-4b, 5-4c and 5-5a, 5-5b, 5-
This comment is acknowledged.
Groundwater flow directions need to be
5c
accurately conceptualized at each source
Water level maps have been revised based
area separately. Page 6-1 states that "The
on the April 2019 groundwater gauging and
CSS ash basins act as bowl -like features
surface water surveying event. Newly
toward which groundwater flows.
installed monitoring wells were also gauged
Groundwater then flows from the basins...."
during this event. These updated water
This description is unclear. At the active
level figures and CSM have refined the
basin, groundwater tends to flow toward the
understanding of groundwater flow
basin from the east and south, and away
directions at the site presented in the CAP
from the basin toward the west and north.
Update.
Sections 6.1.4, 6.10.4, 6.19.4
Groundwater flow directions are described
for each source area separately in the CAP
Update. The horizontal and vertical extent
of COIs are presented by each source area
in CAP Update Sections 6.1.4, 6.10.4,
6.19.4.
DEQ Comment 20.
Figures 6-2 through 6-5, 6-40, 6-41, and 6-
This comment is acknowledged.
Page 6-3 states that "Fill was used in the
64, 6-65, 6-66
construction of dikes and as cover for ash
Areas known fill locations and depths are
storage areas." Areas and depths of fill need
presented on the cross -sections in the CAP
to be mapped where known.
Update. This information was developed
from borings performed for the CAMA work
and from geotechnical information
associated with closure design.
DEQ Comment 21.
Appendix F
This comment is acknowledged.
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Page 6-6 states that "The dip direction of the
foliation cannot be determined from the
A new Fractured Bedrock Evaluation is
borehole data." Discussion is needed about
presented in the CAP Update as Appendix
how this affects the understanding of
F. This appendix contains an evaluation of
contaminant transport in individual source
Sections 6.2.2, 7.2.2, and 8.2.2
lineaments and presents the results of the
areas. Page 6-6 also states that "Data from
investigation of additional bedrock wells
rock cores also show two predominant joint
Sections 6.1.4, 6.10.4, 6.19.4.
installed adjacent to the ash basin dams.
sets; a 40- to 50-degree dipping set and a
horizontal to sub -horizontal set." Which
The CAP Update also discusses the
rock cores? The report needs to state well
predominant strike and dip of bedrock
IDs and a map. Discussion is needed about
fractures in each source area. Based on this
how this affects the understanding of
information, preferential flow directions are
contaminant transport in individual source
estimated, where applicable. Bedrock
areas.
fracture apertures and matrix characteristics
that affect flow and transport are also
presented for the individual source areas.
The horizontal and vertical extent of COIs
are presented by each source area in CAP
Update Sections 6.1.4, 6.10.4, 6.19.4.
The CAP content was developed to meet the
requirements of the CAP Guidance
(Corrective Action Plan Content for Duke
Energy Coal Ash Facilities, April 27, 2018)
issued by DE .
DEQ Comment 22.
Figures 6-2 through 6-5, 7-2, 7-3, and 8-2
This comment is acknowledged.
Page 6-7 states that "The similarities in
through 8-4
extent of saprolitic depths at boring locations
Based on boring data presented in the CSA
and mineralogical composition suggest
and on additional borings completed since
uniform regolith conditions across the Site."
that submittal, varying saprolite thicknesses
Which specific locations are being referred to
Sections 6.1.4, 6.10.4, 6.19.4
are present across the facility. The saprolite
here? This conclusion runs counter to other
thicknesses are best represented in cross
sections of the report that suggest varying
sections developed for each source area.
thicknesses of saprolite across the facility
The cross sections have been chosen to
e. . saprolite was not encountered in the
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SW area of the active basin at locations
generally correspond with major flow paths
CCR-15D and GWA-47D). Need discussion
for the particular source area.
of saprolite by individual source area rather
than by facility. Discussion needs to focus
The CAP content was developed to meet the
on the local stratigraphic factors that affect
requirements of the CAP Guidance
contaminant transport along "hot" flow
(Corrective Action Plan Content for Duke
paths.
Energy Coal Ash Facilities, April 27, 2018)
issued by DEQ.
The horizontal and vertical extent of COIs
are presented by each source area in CAP
Update Sections 6.1.4, 6.10.4, 6.19.4.
Discussions regarding the groundwater flow
layer occurrence and extent of COIs in
groundwater are presented by source area in
the CAP Update. These stratigraphic
features were incorporated into the flow and
transport model to represent COI
movement.
DEQ Comment 23.
Appendix F
This comment is acknowledged.
Page 6-8 summarizes the major structures
observed during geologic outcrop mapping,
Understanding of site -specific geologic
and five commonly occurring joint sets
structure was refined based on results of
(strike and dip) were noted. Page 6-8 states
downhole logging observations. The results
that "The significant structure with respect
are presented in the Fractured Bedrock
to groundwater movement include the joint
Evaluation (Appendix F).
sets.... that were observed to be very
continuous and crosscutting of fold
Sections 6.1.4, 6.10.4, 6.19.4
Predominant strike and dip of bedrock
structures and fractures that have formed
fractures at each source area are presented,
along foliation in brittle (pressure and
based on in -situ fracture orientation
temperature) conditions." Need discussion
measurements at bedrock boreholes. In
of how these outcrop observations relate to
addition lineaments are presented and
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the geology in individual source areas and
discussed. Based on this information,
how it affects contaminant transport in key
preferential flow (anisotropy) directions are
areas of concern.
estimated. Fracture apertures and matrix
characteristics for flow and transport are
also presented for each source area.
The CAP content was developed to meet the
requirements of the CAP Guidance
(Corrective Action Plan Content for Duke
Energy Coal Ash Facilities, April 27, 2018)
issued by DEQ.
The horizontal and vertical extent of COIs
are presented by each source area in CAP
Update Sections 6.1.4 6.10.4 6.19.4.
DEQ Comment 24.
Figures 6-2 through 6-5, 7-2, 7-3, and 8-2
This comment is acknowledged.
Page 6-9 states that "Two major factors that
through 8-4
influence the behavior of groundwater in the
Varying saprolite thicknesses are present
vicinity of the Site include the thickness (or
Appendix G
across the facility. The saprolite thicknesses
occurrence) ofsaprolite/regolith and the
are presented in the in referenced cross
hydraulic properties of underlying bedrock."
Sections 6.1.4, 6.10.4, 6.19.4
sections. These cross sections have been
Page 6-9 also provides a paragraph that
chosen to generally correspond with major
generalizes saprolite thicknesses across the
flow paths associated with the respective
facility. Given that these are major factors,
sources. Discussions regarding the
need saprolite mapping at each source area
groundwater flow and extent of COIs in
and a discussion of how these effect
groundwater are presented by source area in
contaminant transport locally at each source
the CAP Update.
area.
The flow and transport model (Appendix G)
was constructed by using the various
thicknesses and properties of saprolite,
transition zone, and bedrock at the site. The
predicted transport of COIs for each source
area is based on these thicknesses and
properties.
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The horizontal and vertical extent of COIs
are presented by each source area in CAP
Update Sections 6.1.4, 6.10.4, 6.19.4.
DEQ Comment 25.
Figures 6-2 through 6-5, 7-2, 7-3, and 8-2
This comment is acknowledged.
Page 6-10 states that "Generalized cross-
through 8-4
sections are presented in Figures 6-2
Cross -sections have been revised in the CAP
through Figure 6-14 showing site geology
Update including information based on
and groundwater flow directions." Many of
additional borings. These revised cross
the flow directions shown on these cross
sections include revised flow directions
sections are in error and need to be
where applicable.
corrected.
DEQ Comment 26.
Figures 6-2 through 6-5, 7-2, 7-3, and 8-2
This comment is acknowledged.
A discussion of ash pore water was
through 8-4
presented on p. 6-10 but included few or no
The number and location of pore water wells
new details. Seven borings were made
were selected based on access and safety
within the waste boundary of the active
concerns associated with drilling in an ash
basin but only four contained ash. Three of
basin. The locations of the monitoring wells
four borings in Units 1-4 basin encountered
installed in the basin to monitor ash pore
ash. Two of eight borings at the Unit 5 basin
water were discussed with NCDEQ at the
encountered ash. And two of five borings at
time drilling began.
the ash storage area encountered ash. Need
discussion about whether these small
Additional monitoring wells AB-7S/BRU/BR,
number of borings that encountered ash are
AB-8S/I/BRU/BR, and AB-9S/D/BR were
sufficient to adequately describe the source
installed in March and April 2019 in the
and its pore water variability in each of the
central portion of the AAB. The ash
individual source areas. Need discussion
thicknesses encountered during the
about whether the ash that was encountered
installation of these monitoring wells have
in each of the source areas was of the
been incorporated into the updated cross
approximate depth and thickness that would
sections in the CAP Update.
be expected based on historic topographic
mapping, as -built drawings, and disposal
Isopach figures depicting calculated ash
records.
thicknesses were provided to NCDEQ on
Appendix B, Figures 1 and 2
September 30, 2018 (Appendix B, Figures
1 and 2). These figures were created using
historical topographic maps, recent ground
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surface survey data, boring logs, and
bathymetric surveys. The isopach figures
have been used to map the extent, volume,
and thickness of ash.
DEQ Comment 27.
Figures 5-4a, 5-4b, 5-4c and 5-5a, 5-5b, 5-
This comment is acknowledged.
Page 6-12 presented a broad discussion of
5c
groundwater flow directions but included few
The CAP Updated contains discussions of
details. Groundwater flow directions need to
groundwater flow directions for each source
be understood locally at each source area.
area. The site CSM discusses flow in the S,
Where a local groundwater divide occurs and
D, and BR layers and discusses discharge
splits the contaminant flow toward different
areas for each source area.
discharge areas (e.g. the area N-NE of AB-
3), its location needs to be mapped. Areas
The water level maps provided in the CAP
in need of additional wells or WL
present groundwater elevations gauged on
measurements need to be discussed. The
April 22, 2019 and include data from the
goal should be a detailed understanding of
initial wells and from additional well
local flow directions in all three flow units (S,
installations. Sixteen elevations of various
D, and BR) from the source across the waste
surface water features including Suck Creek
boundary to areas of discharge. As
were surveyed on April 22, 2019 and their
requested in prior comments to Duke, large
elevations are also shown on the water level
scale maps are most effective for local
maps. The water level and potentiometric
potentiometric mapping, and they need to
maps provided in the CAP Update have 2-
contain superimposed 2 ft topographic
foot topographic contours superimposed on
contours, measurements made in selected
them.
surface water locations (e.g. near the dam
at Suck Creek), and measurements made at
ALL existing monitor wells.
The groundwater flow directions presented
on these figures were interpreted from the
gauged groundwater elevations and
surveyed surface water elevations. Newly
installed monitoring wells were also gauged
during this event. These updated water
level figures and CSM have refined the
understanding of groundwater flow
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directions at each of the source areas, as
presented in the CAP Update. Groundwater
flow directions are described for each source
area separately in the CAP Update.
These updated water level maps and the
predicted groundwater flow directions from
the flow and transport model provide a
detailed understanding of the groundwater
flow in the three flow layers.
DEQ Comment 28.
Section 5.1.1
This comment is acknowledged.
Page 6-13 and 6-14 presents average
hydraulic gradient values for selected
Horizontal hydraulic gradients were
shallow, deep, and bedrock wells. It is
Appendix B, Tables 2, 3, 4, and 5
calculated along the geochemical transects
unclear how the wells were selected for use
and other flow transects at the site known to
in calculations and in the averaging. Very
be the areas with the greatest
basic observations were noted such as areas
concentrations of COIs for each source area.
of higher relief had higher hydraulic
The hydraulic gradients were calculated for
gradients. A much more relevant and useful
relative to the adjacent flow units. Vertical
analysis would be to a) compute hydraulic
gradients were calculated between the
gradients along segments of "hot" flow paths
shallow and deep and the between deep and
in individual source areas, b) repeat the
bedrock flow layers along these transects
computation for each flow unit (S, D, and
where data was available. Appendix B,
BR) and compare them, and c) compute
Tables 2, 3, 4, and 5 present the calculated
vertical gradients between SID and D/BR
vertical gradients.
units at well nests along these segments.
This would help provide an understanding of
Figure 5-7 presents a depiction of vertical
contaminant transport characteristics in
gradients (and boron concentrations) for
"hot"areas of the site.
each flow layer of the AAB.
DEQ Comment 29.
Appendix B, Tables 3, 4, and 5
This comment is acknowledged.
Page 6-14 also presents average vertical
gradients for selected pore water to shallow
Vertical hydraulic gradients were calculated
wells, shallow to deep wells, and deep to
for all well pairs across the site where data
bedrock wells. Again, it is unclear how the
was available. These updated gradients
wells were selected for use in calculations
Section 5.1.1
were calculated based on the April 2019
and in the averaging. One observayqalyasl
1,
water level gauging event. The vertical
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that upward gradients were noted in
gradients are presented in the table per
upgradient background locations (MW-24
source area. Appendix B, Tables 3, 4, and
and BG-1). This observation runs counter to
5 present the calculated vertical gradients.
the conceptual model (downward gradients
Vertical gradient discussions for each source
in upslope areas and upward gradients in
area are presented in the CAP Update.
discharge areas) but was not discussed or
explained. Need discussion for locations
As shown on Appendix B, Table 3, a slight
that do not follow the conceptual model.
downward vertical gradient is calculated
Need discussion of the significance of a 0.2
between the shallow and the deep layer in
ft vertical gradient.
well BG-1 (0.01 ft/ft) and a slight upward
gradient is observed (-0.01 ft/ft) between
the deep well and the bedrock well at this
location. At well location MW-24, upward
vertical gradients were calculated between
the deep and bedrock wells (-0.10 ft/ft), the
shallow and deep (-0.14 ft/ft), and the deep
and bedrock layers (-0.15 ft/ft). As the
comment notes, both of these well sets are
located in areas upslope from the AAB,
however both locations are downslope from
the presumed groundwater divide located
along or near Prospect Church Road.
Additionally, location MW-24 is located
south-west and nearby a small farm pond.
This pond likely exerts some local effects on
nearby groundwater flow and gradients.
The comment requests "discussion of the
significance of a 0.2 ft vertical gradient."
However, no additional context is provided
therefore it is not possible to provide a
response to that part of the comment.
DEQ Comment 30.
Section 5.1.1
This comment is acknowledged.
Page 6-15 presents geometric means of
hydraulic conductivities computed from
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shallow, deep, and bedrock wells. Values
Appendix G
The hydraulic conductivity values referenced
were lowest for the transition zone which
were from slug test described in the CSA.
runs counter to statements on page 5-2 and
The results were shown on CSA Table 6-12
on page 5-3 in which the transition zone is
and those results show little difference
identified as the most transmissive, not the
between conductivities between the
least.
transition zone and the M1, M2 layers.
The flow and transport model subdivides
flow layers into horizontal hydraulic
conductivity zones and uses a calibrated
hydraulic conductivity (k) for each zone and
model flow layer.
The hydraulic conductivity values, by layer
and by horizontal spatial zone, are presented
on Table 5-2 in the model report (Appendix
G). These values are summarized below:
• Shallow zone (Saprolite) - 0.1 to 5.0
ft/day
• Transition zone - 0.04 to 4.0 ft/day
• Fractured bedrock - 0.001 to 8.0 ft/day
• Bedrock (lower) - 0.001 to 0.01 ft/day
Transmissivity is defined as the product of
the flow unit thickness and the hydraulic
conductivity (T = b•K ).
Since the varying thicknesses of the layers
at the site and the varying properties are
used in the flow and transport model, it
would be more appropriate to rely on the
calibrated flow and transport model to
predict flow than to make generalities about
tests on small scale areas.
DEQ Comment 31.
Appendix G
This comment is acknowledged.
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Page 6-15 also states that "These
As noted in the comment, properties of
measurements reflect the dynamic nature of
aquifer materials in the transition zone can
the transition zone, where hydrologic
impact COI movement locally and it is
properties can be heavily influenced by the
important to account for these
formation of clays and other weathering by-
considerations in corrective action design.
products." Need discussion about how this
To account for this potential variation of
affects contaminant transport locally and
properties in the transition zone, and in the
implications for corrective action design.
other model layers, the flow and transport
model used an extensive calibration process.
This process allows local flow and
contaminant transport mechanisms to be
represented in the model and in the
corrective action developed form the model.
The calibration process is briefly described
below with additional details contained in
Appendix G.
Initial estimates of hydraulic properties used
in the model were based on literature
values; results of slug tests, pumping test,
and core tests, and simulations performed
using a preliminary flow model.
The flow and transport model presented in
the CAP Update was calibrated in stages to
water levels in 312 wells screened in each of
the 8 model layer and to boron
concentrations measured in those wells. This
calibration was performed by adjusting the
hydraulic parameters of hydraulic
conductivity and the horizontal to vertical
hydraulic conductivity anisotropy ratio. After
the initial model runs using the initial
estimated values described above, the
values were adjusted within zones contained
in each of the 8 model layers.
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The model layers were further refined using
multiple horizontal zones within each layer
to improve calibration at a more granular
level. In the transition zone alone, 11
separate zones were used. Section 5.0 of
the flow and transport model describes the
details of the calibration process with the
details of the individual zones shown on
Table 5-2.
This approach allows the final calibrated flow
model to achieve a mean head residual of -
0.19 feet, a root mean squared error (RMSE)
of 4.48 feet, and a normalized root mean
square error (NRMSE) of 2.43 percent.
Typical expected calibrations of 10% or less
are considered the standard.
DEQ Comment 32.
Appendix F
This comment is acknowledged.
The report states (p. 6-16) that "primary
porosity is negligible" when referring to
Bedrock rock core samples were collected
contamination in the bedrock unit. While
and analyzed by Core Laboratories (Core
this may be true, the report provides no
Labs) for porosity, bulk density, and thin
basis for this statement. This will be a
section petrography.
fundamental assumption in a CAP design
and needs to be substantiated in the CSA.
Rock core samples were analyzed for
porosity using Boyle's Law technique by
measuring grain volume and pore volume at
ambient conditions. Results from the matrix
porosity and bulk density analysis are
presented in Appendix F, Table 2. The
reported matrix porosity values ranged from
0.62 percent to 4.87 percent, with an
average of 1.59 percent. The reported
matrix porosity values are within the range
of those reported for crystalline rocks in the
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literature (Freeze and Cherry, 1979;
L6fgren, 2004; Zhou and others, 2008;
Ademeso and others, 2012). The presence of
measurable matrix porosity suggests that
matrix diffusion contributes to plume
retardation at the Site (Lipson and others,
2005).
DEQ Comment 33.
CSA Update Figures 6-3, 6-4, 6-5, 6-7, 6-
This comment is acknowledged.
The GW flow directions shown on the
18, 6-13
geologic cross sections in figs. 6-3, 6-5, 6-7,
The generalized groundwater flow directions
6-8, and 6-13 were incorrect and thus
shown on the referenced cross sections is
inadvertently misleading.
discussed below:
The cross sections on CSA Update Figures
6-3, 6-5, 6-7, 6-8 are aligned to be
approximately normal to the general
groundwater flow direction. The GW
direction flow arrows represent the vector
component of the flow direction that is in -
plane with the cross section alignment.
While not incorrect, the figures should have
contained a note to explain the projection
and reference the predominant groundwater
flow direction. The groundwater flow
direction arrows shown on (CSA Update)
Figure 6-13 appear to be generally correct
based on the groundwater data available at
that time.
The geologic -cross sections and groundwater
flow directions shown on the cross -sections
in the CAP Update were updated and
included additional data based on the
additional installed wells since the CSA
Update report.
DEQ Comment 34.
Appendix C, Table 4
This comment is acknowledged.
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Section 7.2 (Facility Soil Data) states that
the soil beneath ash was collected in three
Soil sample locations and analytical results
locations within the active basin, 3 locations
are presented in CAP Update Appendix C,
within the units 1-4 basin, 1 location within
Table 4 along with a comparison of the
the unit 5 basin, and 2 locations in the ash
results to the PSRG POGs.
storage area. Need discussion about
whether this density is adequate (especially
A total of 286 soil samples were collected at
given the variability of ash and pore water
the site. This includes the following numbers
conditions within each of the waste
of samples at the source areas listed below.
boundaries). Need discussion, for each
Sections 6.1.2, 6.10.2, and 6.19.2
Samples not described below were collected
source area, to cite the specific boring/well
at background, side -gradient, and upstream
IDs and depths where exceedances of POG
of source areas locations, and at other
and BTVs occurred and whether these
potential source areas.
exceedances appeared to be linked in any
way to groundwater contamination
AAB
downgradient. The exceedances need to be
14 samples beneath ash
formally identified as a "secondary source"
20 samples in embankments or
and mapped accordingly.
downstream of embankments
ASA
• 5 samples in storage area
• 2 samples downgradient
U1-4 AB
• 48 samples in basin
• 3 samples downgradient
U5 AB
• 3 samples beneath ash
• 43 samples in embankments or
downstream of embankments
Saturated soil is considered a component of
the groundwater flow system. The potential
leaching and sorption of constituents in the
saturated zone is included in the flow and
transport and geochemical model
evaluations (Appendix G and H).
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Saturated soil samples with values reported
at greater than the PSRG POG or
background value are vertically delineated
by groundwater constituent concentrations
in the corresponding flow layer of the soil
sample depth.
The number of samples and the density is
considered sufficient to evaluate corrective
action.
DEQ Comment 35.
Figures 6-7, 6-21, and 6-68
This comment is acknowledged.
Section 7.2 (Facility Soil Data) also states
that soil outside the waste boundaries was
Tables 6-3, 7-3, and 8-3
The location of the unsaturated soil sample
sampled at various downgradient locations.
locations and exceedances per source area
Results were presented generically without
are presented on Figures 6-7, 6-21, and 6-
identifying boring/well IDs and depths.
68.
Need discussion by source area of specific
locations that exceeded the POG and BTV
The analytical results for these sample
and why. Discuss implications or
locations are presented in Tables 6-3, 7-3,
appropriateness of defining these locations
and 8-3. The sample nomenclature for the
as secondary sources.
Sections 6.1.2, 6.10.2, and 6.19.2
soil samples is the boring ID with the sample
depth in parenthesis for each soil sample.
Discussion of the soil results is presented by
source area in the CAP Update.
DEQ Comment 36.
This comment is acknowledged.
Section 7.4 (White Material at Toe of Unit 5
Inactive Ash Basin Dam) stated on p. 7-9
that "the white material was consistently
SEM-EDX analysis of the white material
observed and noted in reports from
indicates a composition of mostly aluminum -
September 11, 2014 to July 21, 2015, with
silicate phases with secondary iron and
the exception of the January 28, 2015 and
manganese oxides. Measurements of ion
February 19, 2015, reports in which the
concentrations within seeps were used as
white material was not observed. Need
input values for PHREEQC batch simulations
discussion about why (cause) the substance
(input code provided below). A number of
appeared, why it disappeared on certain
mineral phases were found to be saturated
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dates, whether lab tests determined that it
but the SEM-EDX data available cannot
exceeded the POG and BTV, and implications
distinguish between the various potential
for groundwater contamination and 2L
aluminum -silicate phases. Simulations were
compliance.
run using the phreegc.dat, Ilnl.dat, and
mintegv4.dat databases to evaluate the
range of possible phases. The primary AI -Si
bearing phases that were saturated
included: Pyrophyllite, kaolinite, illite,
montmorillonite, leonhardite, and mica. SiO2
phases quartz, cristobalite, and chalcedony
and the MnO2 phases pyrolusite, nsutite, and
birnessite were also saturated. Though
unlikely to form under these conditions,
hematite was many orders of magnitude
above saturation as well as the more likely
goethite and ferrihydrite phases. Running
PHREEQC in batch mode and allowing each
of these phases to form under the
EQUILIBRIUM_PHASES command indicates
that pyrophyllite will precipitate using the
standard phreegc.dat database.
Considering how near saturation the seep
water is for many mineral phases, the most
likely pathway of formation is due to slight
evaporation of the seep water when it
reaches the surface resulting in the
formation of a supersaturated solution and
then precipitation. Assuming that the
oxidation state of the mobile iron and
manganese within the seep waters is Fe(II)
and Mn(II), oxidation by dissolved oxygen
once the seep water equilibrates with the
atmosphere will result in formation of
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manganese oxide and iron oxide minerals.
Manganese oxide minerals are known to co
precipitate a wide range of other ions and
iron oxide minerals are strong sorbents.
Therefore, formation of these manganese
and iron oxide minerals has the potential to
limit the mobility of other constituents if
they are present.
The appearance and disappearance of this
material is proposed to be associated with
rainfall and wet -dry cycling. Rainfall and
runoff can both decrease the saturation
state of the mineral leading to dissolution
and physically transport the white substance
with flow.
DEQ Comment 37.
Figure 1-2
This comment is acknowledged.
Page 8-1 states that "Sediment sample
locations are shown on Figure 2-10.
Sediment samples are depicted on CAP
However, 9 of the 34 locations were not
Update Figure 1-2. These include the
shown on the figure (or any figure). These
NCDENR March 2014 sample locations.
correspond to the NCDENR March 2014
sample locations. The map needs to be
Sections 6.1.2, 6.10.2, and 6.19.2
Sediment sample results are discussed by
revised to include the locations. The
source area in the CAP Update in Sections
information in this section intermixes all
6.1.2, 6.10.2, and 6.19.2. As applicable,
source areas. The sediment locations
the discussions include the cause of these
associated with a specific source area need
exceedances and their potential to be a
to be grouped accordingly. It was noted
secondary source to groundwater.
that several locations had a CCR
Appendix E
contaminant that exceeded the soil POG and
The updated risk assessment considered
soil BTV. Discussion is needed about a) the
sediment concentration results and found
cause of these exceedances, b) their being a
there is no evidence of unacceptable risks to
secondary source, c) what they mean for
human and ecological receptors exposed to
risk, 2L/2B compliance, and remediation,
environmental media potentially affected by
Appendix J
CCR constituents at Cliffside.
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and d) whether additional sampling is
needed and, if so, where.
The surface water mixing model evaluation
(Appendix 3) confirms that predicted
resultant constituent concentrations in
applicable surface waters are less than 02B
surface water standards.
The remedial options presented in the CAP
Update for each source are consider the
sediment results and makes no
recommendation for additional sediment
samplinq at this time.
DEQ Comment 38.
Figure 1-2
This comment is acknowledged.
Page 8-6 Section 8.2 (Sediment in Major
Water Bodies) states on p. 8-6 that
Additional sediment samples have been
"Sediment samples have not been collected
collected since the CSA Update was
from the Broad River." Sediment sampling
submitted. Sediment samples SED-1
needs to be conducted adjacent to the unit 5
through SED-16 were collected on April 20,
basin, coal piles, units 1-4 basin, ash
2018. The location of these sediment
storage area, and north end of the active
samples are shown on Figure 1-2. The
basin and near the monitor well containing
additional sediment samples were collected
the greatest CCR contamination.
in the locations of the surface water samples
that were collected as part of the 2L/213
current conditions evaluation in 2017 and
reflect areas potentially impacted by CCR
COIs. The coal pile assessment report will be
submitted to DEQ in March 2020. The
decision to sample sediment adjacent to the
coal pile will be made based on the results of
that assessment
DEQ Comment 39.
Appendix C, Table 3
This comment is acknowledged.
Page 9-1 states that surface water was
collected from ponded water within the
Ponded water sampling results from within
active ash basin. Depth of sampling needs
the AAB are presented in Appendix C, Table
to be provided here along with an
3. The water sample locations are sample
acknowledgement that CCR concentrations
IDs Active Ash Pond SW-5 and SW-7.
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tend to increase with depth (proximity to the
These samples were generally collected as
ash itself).
grab samples from the first several feet of
water encountered in the basin. In June
2019, water samples SW-5 and SW-7 were
collected from a "shallow" and "deep"
sampling interval. The shallow samples
were collected approximately one foot below
the water surface in the AAB. The deep
samples were collected approximately one
foot above the ash, at the bottom of the
water profile.
There is some variability in the results
between the SW-05 Deep and SW-05
Shallow samples with several constituents
having greater concentrations in the deep
sample, however, the turbidity in the deep
sample was 143.0 NTU compared to
turbidity in the shallow sample of 10.4 NTU.
The elevated turbidity would be expected to
produce results with elevated
concentrations.
There is less variability in the results
between the SW-07 Deep and SW-07 with
the differences between the results being
less that at the SW-05 location and smaller
differences in results between the shallow
and deep samples. At this location the
turbidity in the deep sample was 9.0 NTU
compared to turbidity in the shallow sample
of 18.0 NTU.
Based on the elevated turbidity in the deep
sample at SW-05 it is difficult to make
generalizations about differences in results
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between shallow and deep samples. Sample
results at SW-07, with similar lower
turbidities, did not exhibit significant
differences between the shallow and deep
samples.
DEQ Comment 40.
Appendix C, Table 2
This comment is acknowledged.
The section titled "Suck Creek and Broad
Appendix J
River Sample Locations" on page 9-2
Surface water sample results and their
provides ALL sample locations along both
associated surface water bodies are
water bodies with no indication of which
presented in CAP Update Appendix C, Table
samples pertain to which source area.
2. The sample locations are presented along
Because corrective action is source area
with the associated unit or source area, as
specific and dependent upon whether
applicable.
contaminated groundwater is impacting
surface water, it is important to understand
The sample results are discussed in the
which samples are associated with which
current conditions surface water evaluation
source area. Need sample locations grouped
and the future conditions surface water
by source area.
evaluation presented in Appendix J.
The future conditions surface water mixing
model evaluation confirms that predicted
resultant constituent concentrations in
applicable surface waters are less than 02B
surface water standards.
DEQ Comment 41.
Appendix J
This comment is acknowledged.
Page 9-3 states that "The results of the
sampling indicated that at most locations
The text in the CSA was developed prior to
downgradient and/or adjacent to the ash
additional sampling performed and
basins, constituent concentrations, where
referenced below.
detected, are consistent with results from
background locations' The use of the word
Surface water sample results and their
"most"needs to be revised to make the
associated surface water bodies are
statement specific and definitive; were
discussed in the current conditions surface
water evaluation and the future conditions
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surface water standards exceeded and if so,
surface water evaluation presented in
to what extent and why?
Appendix 7.
The current conditions report found no 02B
exceedances in Suck Creek or the Broad
River attributable to the ash basins. The
future conditions surface water mixing
model evaluation confirms that predicted
resultant constituent concentrations in
applicable surface waters are less than 02B
surface water standards.
DEQ Comment 42.
Appendix J
This comment is acknowledged.
Page 9-4 states that "The results of the
sampling indicated that, generally, at
The text in the CSA was developed prior to
downgradient locations and/or locations
additional sampling performed and
adjacent to the ash basins, constituent
referenced below.
concentrations, where detected, are
consistent with constituent concentrations
Surface water sample results and their
from background locations': The use of the
associated surface water bodies are
word "generally" needs to be revised to
discussed in the current conditions surface
make the statement specific and definitive;
water evaluation and the future conditions
were surface water standards exceeded and
surface water evaluation presented in
if so, to what extent and why?
Appendix J.
The current conditions report found no 02B
exceedances in Suck Creek or the Broad
River attributable to the ash basins. The
future conditions surface water mixing
model evaluation confirms that predicted
resultant constituent concentrations in
applicable surface waters are less than 02B
surface water standards.
DEQ Comment 43.
Appendix J
This comment is acknowledged.
Page 9-5 states that "Analytical results with
the dissolved phase concentrations greater
The use of the word 'invalid" was not
than the associated total reportable
intended in its most precise use. The correct
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concentrations are not included in the
term would be anomalous. Total and
assessment as they are considered invalid':
dissolved metals concentrations are not
Need discussion about the specific locations
compared during data validation to
where this occurred, what constituents and
determine the validity of the results, as this
values were observed and whether the
is not a required step of the USEPA
values exceeded surface water standards,
Functional Guidelines for Inorganics. Unless
why it may have occurred, and whether re-
the dissolved and total concentrations were
sampling was conducted and if not, why not.
significantly different from one another
(>RPD of 35%) and that specific analyte for
that specific well is critical for decision -
making purposes, resampling would not be
necessary. Standard procedures do not
include resampling when a field duplicate is
different from the parent sample, which is
essentially the same type of situation.
Total metals analysis for water samples
includes both the metals dissolved in the
water and the metals present in the
particulates. Total metals analysis results
should be greater than or equal to dissolved
metals analysis results because dissolved
metals is a subset of total metals. Dissolved
metals are generally considered more mobile
and biologically available, and therefore the
dissolved metals results are useful for more
refined risk assessment and fate & transport
studies. However, if the results returned are
anomalous, meaning that the dissolved
metals results are significantly greater than
the total metals results, there may be
several reasons for this situation.
A number of field collection activities can
cause an anomaly. For example, total and
dissolved metals are often collected in
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separate bottles which leaves open the
possibility for bottle swapping, improper
labeling, etc. Also, a number of different lab
analysis activities and practices can cause
the return of an anomalous result, such as
non -uniform sample preparation techniques
in the lab or a variance in calibration curves,
as examples.
DEQ Comment 44.
Appendix C, Table 2
This comment is acknowledged.
Section 9.2 (Discussion of Results for
Appendix B, Table 9
Constituents Without Established 2B) did not
Surface water standards included in
include standards associated with EPA
Appendix C, Table 2 include 02B standards
criteria that are used by the Division in
Appendix J
and EPA applicable USEPA National
surface water quality determinations. This
Recommended Water Quality Criteria. As
section and all assessment of surface water
stated by the USEPA, these criteria are not a
results need to be revised to include the EPA
regulation, nor do they impose a legally -
criteria values. (See NC surface water
binding requirement. Therefore,
standards website link or contact ARO.)
comparisons with these criteria are only for
situational context. The constituents that
have corresponding EPA criteria but do not
have DEQ 02B criteria are Alkalinity,
Aluminum, Antimony, Iron and Manganese
(Appendix B, Table 9).
The future conditions surface water mixing
model evaluation confirms that predicted
resultant constituent concentrations in
applicable surface waters are predicted to be
less than 02B surface water standards
(Appendix ) .
DEQ Comment 45.
Appendix C, Table 2
This comment is acknowledged.
Need surface water results presented in a
table by source area. All relevant standards
Surface water analytical results are
need to be shown in the table along with the
presented by source area in Appendix C,
stream classification associated with the
Table 2. The results are compared to the
sample location.
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appropriate standards, as described in the
revious comment.
DEQ Comment 46.
Appendix C, Table 2
This comment is acknowledged.
Page 9-10 states that "dissolved oxygen,
dissolved cadmium, and hardness are the
Dissolved cadmium and hardness are the
only 2B exceedances reported downstream
only historical 2B exceedances reported at
(SW-BRAB-1, SW-BRAB-2, and SW-BRAB3)
surface water sample locations SW-BRAB-1,
in samples collected from the Broad River."
Appendix B, Table 6
SW-BRAB-2, and SW-BRAB-3, collected from
Need discussion about the implications of
the Broad River. SW-BRAB-1 is located near
these exceedances on corrective action (by
the ASA. Samples SW-BRAB-2 and SW -
relevant source area) and potential follow up
BRAB-3 are located near and downstream
sampling.
from the AAB and NPDES Outfall 002.
Outfall 002 has not been sampled during
CAMA surface water sampling events
because it is an NPDES outfall and is
regulated and the results reported under
that regulatory program. Specific reporting
requirements under the NPDES program
have inhibited collection of a sample from
this location and water sample SW-7 has
been collected from the ponded water in the
AAB as a surrogate for comparative
purposes in lieu of collecting a sample from
the outfall itself.
Surface water samples SW-BRAB-1, SW-
BRAB-2 and SW-BRAB-3 were re -sampled on
June 4, 2019. A water sample was also
collected from sample location S-7 from the
water in the AAB, and in conjunction with
the NPDES sampling event at Outfall 002
(Appendix B, Table 6). Dissolved cadmium
was reported less than the reporting limit at
Outfall 002 during the June sampling event
and hardness was not analyzed for.
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Hardness was not analyzed for the surface
water samples during the June sampling
event and the dissolved cadmium adjusted
reported limit was greater than the 02B
standard, therefore hardness and dissolved
cadmium results are not available for
comparison from this sampling event.
Dissolved oxygen (DO) was reported during
the June 2019 sampling event at
concentrations greater than the minimum
02B standard of 4.0 mg/L with similar
concentrations in the three surface water
samples. SW-BRAB-1 was reported at 7.3
mg/L, SW-BRAB-2 at 7.4 mg/L and SW-
BRAB-03 at 7.6 mg/L. Therefore, there are
no exceedances of the 02B standard for DO.
SW-BRBR and SW-9 are the background
surface water sample locations in the Broad
River (Figure 1-2). The historical DO
concentrations reported at these locations
have ranged from 4.7 mg/L to 10.5 mg/L at
SW-9 and 8.9 to 11.1 at SW-BRBG.
The DO reported in SW-BRAB-1, 2, and 3
are within the historical background range of
DO reported for the Broad River and are all
above the minimum DO standard.
Both the March 2017 Surface Water
Evaluation to Assess 15A NCAC 02B. 0200
Compliance for Implementation of Corrective
Action under 15A NCAC 02L .0106 (k) and
(l) Report (current conditions report) and
the May 2019 Surface Water Future
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Conditions Evaluation to Assess 15A NCAC
02L .0106 (k) and (l) Report (future
conditions report) found that impacted
groundwater from the ash basins and ASA at
Cliffside are not, and will not in the future
cause 02B surface water standard violations
in the Broad River or Suck Creek.
DEQ Comment 47.
Figure 1-2
This comment is acknowledged.
Page 9-10 also states that "Based on the
available data for the upstream and
Section 6.1, 6.10, and 6.19
The comment above describes the sample
downstream Broad River samples, the CSS
locations relative to the source areas and
ash basins and ash storage area are not the
Appendix C, Tables 1 and 3
discusses the available results. The
source of 2B exceedances in the Broad
conclusions of the CAP with regard to
River." Need a more focused discussion to
Appendix J
surface water quality at the site are found,
justify this statement as it appears that the
by source area, in the CAP Update Sections
data as presented may not support this
6.1, 6.10. and 6.19. These evaluations
conclusion.
were performed for both current and future
conditions.
General findings of the evaluation of current
surface water quality conditions at CSS
include:
• Groundwater migration from the ash
basin source area has not resulted in
violations of the 15 NCAC 02B surface
water quality standards in the Broad River.
General findings of the evaluation of future
surface water conditions in potential
groundwater discharge areas include:
• The surface water mixing model
evaluation demonstrates that predicted
constituent concentrations in surface
waters are less than 02B surface water
standards. Therefore, the criteria for
compliance with 02B is met,_allowing
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further evaluation of potential corrective
action under 15A NCAC 02L.0106 (k) or (1).
Additional detail can be found in the
appropriate section of the CAP Update.
DEQ Comment 48.
Figure 1-2
This comment is acknowledged.
Page 9-11 states that "Surface water sample
locations SW-BRAB-2 and SW-BRAB-3 are
Appendix C, Tables 1 and 3
Surface water sample location SW-BRAB-2 is
located immediately downstream of the
located approximately 150 feet downstream
permitted NPDES outfall 002..." Need to
Appendix J
of NPDES Outfall 002 and SW-BRAB-3 is
discuss what is meant by "immediately
located approximately 340 feet downstream
downstream" and whether constituent
of NPDES Outfall 002, with a distance
concentrations were higher in SW-BRAB-3
between the two surface water samples of
(furthest downstream) than SW-BRAB-2
approximately 190 feet.
and, if so, why. Page 9-12 states that the
water chemistry of SW-BRAB-3 "is similar to
As described in the response to DEQ
the water chemistry results of ash pore
Comment 47, the CAP Update performed
water and may be representative of mixing
and evaluation of the potential impacts to
with the permitted NPDES discharge
surface water from discharging groundwater
upgradient of this location." No mention is
for both current conditions and future
made of SW-BRAB-2 - which is closer to
conditions using updated groundwater and
outfall 002 - and would thus be expected to
surface water data (Appendix 3). It would
be even more like the water from outfall 002
be appropriate for DEQ to review the
than SW-BRAB-3. Also need to discuss why
evaluations contained in the CAP Update
outfall 002 was not sampled on the same
with more recent available data.
day and for the same constituents as SW-
BRAB-2 and SW-BRAB-3 as this would
provide much more definitive information on
which to draw conclusions (SW-7, serving as
a surrogate for conditions at outfall 002, is a
sample from quiescent pond water and may
not be representative of conditions at the
highly aerated outfall itself).
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DEQ Comment 49.
Appendix C, Table 2
This comment is acknowledged.
Page 9-12 states that "downstream samples
SW-SC-2 through SW-SC-6 plot with higher
Background surface water sample locations
relative concentrations of major water
in Suck Creek (SW-2, SC-2-UP, CCPSW-1
chemistry ions chloride and sulfate. The
and CCPSW-2) have boron concentrations
water chemistry type of these samples may
reported less than 50 ug/L, which is the
indicate potential mixing from source water
boron groundwater background value for the
impacted groundwater" Need discussion
site. The boron concentrations in SW-SC-2
here of other CCR indicators such as boron
through SW-SC-6 and SW-SC-6A all had
concentrations in these surface water
boron concentrations reported in the surface
samples (and in background surface water).
water samples that were also less than 50
ug/L.
Sodium and chloride are considered
indicators of potential CCR impacts due to
their concentration in CCR material low
tendency for adsorption to site soils. Sample
results for these constituents were low in the
referenced samples which indicate no
discernable impact. Sample results at the
referenced sample locations for chloride
ranged from 4.1 mg/L to 6.7 mg/L. The site
background range for chloride, as noted on
Table 4-4, is 0.0043 j - 20.4 mg/L. The
sample results for sodium at the referenced
sample locations ranged from 2.85j mg/L to
3.59j mg/L. The site background range for
sodium, as noted on Table 4-4, is 1.57 - 10
mg/L. ('j' - estimated concentration above
the adjusted method detection limit and
below the adjusted reporting limit).
DEQ Comment 50.
Appendix C, Table 1
This comment is acknowledged.
Page 10-1 states that a separate table is
provided for the CCR monitoring network. It
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is requested that all groundwater data be
CAMA and CCR groundwater data are
included in ONE table so that the project
presented in Appendix C, Table 1 in the
team does not have to flip back and forth
CAP Update.
among different tables to access
groundwater contamination data.
DEQ Comment 51.
Appendix B, Table 7
This comment is acknowledged.
Page 10-1 states that "the results have been
marked to indicate data points excluded
A list of wells and sample events that were
based on a measured turbidity greater than
excluded from the CAP evaluation are
10 NTUs; high PH values that may indicated
presented in Appendix B, Table 7.
possible grout intrusion into the well screen;
and data that may be autocorrelated
Newly installed wells boring logs and well
because it was collected within 60 days of a
Appendix P
construction records are included in
previous sampling event." 105 individual
Appendix P, including any replacement
monitor wells (a total of 335 samples) are in
wells that have been installed.
this category and were omitted from further
consideration. Need a list of wells and
In the June 29, 2018 letter to Duke Energy,
sample events that were excluded from CSA
NCDEQ stated that sufficient information
use and an indication of which of those wells
Appendix A
was provided to allow the preparation of this
have been replaced. Need a map showing
CAP Update (Appendix A). Duke Energy
any wells for which zero data were available.
agrees with NCDEQ's statement that
For any wells not replaced need discussion
sufficient data is available for the
to explain why, the site -specific information
preparation of this CAP Update, even though
being forfeited as a result, and implications
certain wells have limited data.
for understanding 2L compliance and
contaminant transport (include well IDs and
contaminants). Need discussion about
whether dissolved concentrations may be
used as a lower bound surrogate for turbid
samples and include comparisons of
dissolved versus total concentrations in
several well locations across the facility,
including locations with a replacement well.
DEQ Comment 52.
Appendix C, Table 1
This comment is acknowledged.
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Page 10-1. Autocorrelated data need not be
Data that may be autocorrelated has been
used in statistical tests but may and should
used in the analysis and interpretations in
be used for all other analyses and
the CAP Update. Autocorrelated data was
interpretations. All wells need to be used to
not used in statistical determinations of
interpret boron results regardless of turbidity
groundwater background values. Boron
or pH issues.
results have been used in the mapping and
interpretations presented in the CAP Update
regardless of pH or turbidity issues with the
groundwater samples.
DEQ Comment 53.
Table 4-3
This comment is acknowledged.
Section 10.1 (Background Groundwater
Concentrations) presents PBTVs. Final BTVs
Section 4.2
Updated groundwater background values are
have been determined since the report was
presented in the tables and used throughout
submitted and need to be used to assess
the CAP Update for comparison to
contamination and 2L compliance.
groundwater analytical results.
DEQ Comment 54.
Table 4-3
This comment is acknowledged.
Page 10-6 states that PBTVs were
determined for 10 constituents that do not
Background values were calculated for
have a 2L standard or IMAC. The list did
strontium and molybdenum and were used
not but needs to include Sr and Mo.
as comparison criteria in the CAP Update.
DEQ Comment 55.
Figure 1-2
This comment is acknowledged.
Page 10-7 states that "The wells are not
Sections 6.1.2, 6.10.2, 6.19.2.
screened within the ash and are therefore
The text describing the wells referenced in
not considered pore water wells; however,
the comment is copied below (from CSA
due to their location within the ash basin
page 10-7):
waste boundary they are not categorized
and evaluated as downgradient wells as the
Monitoring wells AB-1S and CLMW-5S are
constituent concentrations reported in these
located within the active ash basin
wells are expected to be more
downstream dam. AB-2S is located within
representative of ash basin water than
the active ash basin upstream dam. IB-3
downgradient groundwater conditions." If
(abandoned) was located within the Units 1-
the wells are not screened in ash they
4 inactive ash basin dam. U5-3S
represent groundwater conditions and need
(abandoned), U5-3S-A (abandoned), and
to be understood, evaluated, and discussed
U5-4S are located in the Unit 5 inactive ash
accordingly. These wells need to be used to
basin main dam, and U5-6S is located in the
understand how pore water impacts
Unit 5 inactive ash basin saddle dam.
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groundwater as it moves away from the
source. Need discussion, by source area,
Although these wells are located within the
about how pore water is impacting
waste boundaries they are considered to
groundwater in these and (other)
represent groundwater conditions and were
downgradient locations. Whether these
included in understanding site conditions.
wells need to be used to assess 2L
The extent of COIs in each source area is
compliance depends on the presence or
presented in CAP Update Sections 6.1.2,
location of a compliance boundary.
6.10.2, and 6.19.2.
Monitoring well locations AB-1 and AB-2 as
well as all monitoring wells located through
the crest of dams at the site are considered
downgradient groundwater monitoring wells
relative to the AAB in the CAP Update.
These wells are used to understand
groundwater impacts downgradient of the
basin and how impacted groundwater is
moving from the basins towards the
compliance boundaries.
The CAP presents a comprehensive
understanding of the results of the
investigations performed at the site,
including the elements required by 02L
.0106. The CAP Update contains the
information required in the DEQ provided
Corrective Action Plan Content for Duke
Energy Coal Ash Facilities with results and
discussions of the required items presented
by source area.
The CAP Update corrective action approach
for source areas contains a section for each
source area titled Saturated Ash and
Groundwater. This section describes the
COI management approach for that source
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area and identifies specific COIs that have
migrated from that source area and
describes, along with other items, the waste
and the extent of constituent distribution at
the source area.
Also presented in that section is the
technical memorandum, titled Saturated Ash
Thickness and Underlying Groundwater
Boron Concentrations - Allen, Belews Creek,
Cliffside, Marshall, Mayo, and Roxboro Sites,
conducted linear regression analyses to
evaluate the relationships between saturated
ash thickness and concentrations of boron in
ash pore water and underlying groundwater.
The linear regression analysis was conducted
using analytical data from Piedmont ash
basins including data from Cliffside.
DEQ Comment 56.
This comment is acknowledged.
Page 10-20 states that certain shallow
Figures 6-13A, 6-13b, 6-45, 6-72
downgradient wells are characterized by
Boron is an indicator of CCR impact. The text
sodium -calcium -chloride to sodium -calcium-
Figures 6-18a, 6-18b, 6-18c, 6-47a, 6-47b,
on page 10-20 states that the boron
sulfate water chemistry. The report goes on
6-47c, 6-75a, 6-75b, 6-75c
concentrations were less than 700 pg/L. This
to state that boron concentrations were less
is significant because that is the 02L
than 700 ug/L for all but one of those
standard for boron.
locations. Aside from determining 2L
compliance, it is unclear why 700 ug/L is
The potential for pore water to contribute to
thought to be significant. Boron is a good
the underlying groundwater system is
tracer of CCR contaminated groundwater,
discussed for each source area in the CAP
whether or not the level is above 700. Need
Update in the section titled Saturated Ash
discussion that describes the understanding
and Groundwater. These sections also
of plume evolution (contaminant transport)
contains discussions of the behavior, extent,
from source inside waste boundary to
and movement of COIs. This section
downgradient-most wells. Discussion might
contains the CAP content required by the
include water type (Piper), sources of clean,
CAP Guidance (Corrective Action Plan
contaminated or mixed recharge water
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boron concentrations, and other factors that
Content for Duke Energy Coal Ash Facilities,
describe why contamination occurs in some
April 27, 2018) issued by DEQ.
areas and not in others. The discussion
needs to be divided by the three source
Updated piper diagrams are provided in the
areas within the active basin (Active North,
CAP update using background and
Active West, and Active South), each of
upgradient wells, porewater, and
which has a different and unique plume
downgradient wells for comparison. Piper
evolution.
diagrams are divided by flow transects
emanating from each of the ash basins
(Figure 6-13A 6-13b 6-45 6-72 .
DEQ Comment 57.
Section 5.1.1
This comment is acknowledged.
Page 10-20 states that "the unique water
chemistry signature and the lack of boron
Section 6.1.2
As noted in response to Comment 55, the
detection [at AB-4D] may indicate
Table 6-4
CAP Update describes the technical
groundwater beneath the basin in the deep
memorandum, titled Saturated Ash
layer is unimpacted" The data suggest that
Figures 6-18a, 6-18b, 6-18c
Thickness and Underlying Groundwater
this conclusion is overstated and needs to be
Boron Concentrations - Allen, Belews Creek,
narrowed to specific areas where the deep
Cliffside, Marshall, Mayo, and Roxboro Sites,
layer appears to be unimpacted. For
conducted linear regression analyses to
example, deep groundwater is clearly
evaluate the relationships between saturated
impacted by CCR (with boron at about 900
ash thickness and concentrations of boron in
ug/L) just downgradient of the basin at
ash pore water and underlying groundwater.
GWA-27D and CCR-14D, an area where no
The linear regression analysis was conducted
overlying saprolite exists (which may have
using analytical data from Piedmont ash
been a potential source of boron for the
basins, including data from Cliffside.
deep unit). Also, deep groundwater is
impacted by CCR at the edge of the waste
The analysis in the memorandum
boundary at AB-1D (B = 610 ug/L), an area
demonstrates saturated ash and ash pore
where shallow groundwater, which may have
water are not significantly contributing COI
been a potential source of boron for the
concentrations to underlying groundwater
deep unit, had no detectable boron. A close
except near dikes and dams, where
look at concentrations along the western
downward vertical gradients exist. Based on
edge of the active basin pond suggest that
the trend analysis results, the thickness of
conditions vary locally and likely are
saturated ash remaining in place following
dependent upon local groundwater directions
closure (closure -in -place only) will have
and local permeability of the flow units. For
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example, CCR-6D, CCR-5D, MW-10D, and
limited to no adverse effect on future
CCR-4D, all drilled in the deep unit near the
groundwater quality.
western edge of the pond, had highly
DEQ is referred to the memorandum for
variable boron of 1190 ug/L, 93 ug/L, 163
details.
ug/L, and 50 ug/L, respectively. It is
unlikely that the deep unit beneath the
Of the 16 well locations beneath the AAB, 15
active basin is unimpacted across the entire
demonstrate minimal (<700 pg/1) to non -
waste boundary, rather it is unimpacted in
detectable boron concentrations, indicating
certain local areas. This is an important
relatively little effect on groundwater quality
point for purposes of understanding
beneath the basin. The exception to the CSM
contaminant transport downgradient and
in the AAB is the well screened in saprolite
corrective action design.
below ash at the AB-8 location. This location
is near the former Suck Creek channel and is
close to the Suck Creek dam where a
downward gradient exists.
CAP Update Figures 6-18a, 6-18b, and 6-
18c present mean concentrations of boron
in the S, D, and BR layers for the AAB and
ASA source area. In general these figures
show mean boron concentrations greater
than the standard to be limited in the S and
D layer and no values greater than the
standard in the BR layer.
Figure 6-18b and 6-18c show boron
concentrations greater than the BTV in the
area where AB -ID is located (dam at Broad
River) however concentrations in the D and
BR layer in this region are below the 02L
standard.
Wells GWA-27D and CCR-14D have mean
boron concentrations greater than the
standard. Well GWA-27 BR has a mean
boron concentration of 286 /L below the
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02L standard. As shown on Figure 6-18c,
all wells in the BR layer at this source area
have mean concentrations for boron below
the 02L standard.
The variability in local boron concentrations
along the western edge of the AAB and the
differences in boron concentrations between
the S and the D layers is noted. The
calibration and zoned approach of the flow
and transport model accounts for local
differences such as these. These factors are
considered in the corrective action design.
DEQ Comment 58.
Sections 6.1.2, 6.2. 7.1.2, 7.2, 8.1.2 and
This comment is acknowledged.
Page 10-20 lists nine bedrock wells that are
8.2
characterized as Ca-K-HCO3 type water
The response to Comment 57 contains
consistent with background bedrock
Figure 6-18c
references to text in the CAP Update and to
groundwater and that have boron less than
figures showing boron concentrations in S,
700 ug/L (five were less than 50 ug/L).
D, and BR layers at the AAB and ASA source
Based on this, the report concluded that this
area relative to BTV values and 02L
"indicates bedrock groundwater at these
standards for boron. As shown on Figure
locations is unimpacted by source
6-18c, concentrations of boron greater than
groundwater." This statement is incorrect.
the BTV are present in bedrock unit at the
Any location with boron above background
AAB and ASA; however no wells show
should be understood to be impacted by CCR
concentrations greater than the 02L
contamination whether or not its water type
standard.
is consistent with background wells. For
example, boron is found in several of the
The CAP Update contains a detailed
bedrock wells listed, including GWA-21BR
discussion of the extent of COIs in the
(102 ug/L), MW-20DR (142 ug/L), GWA-
source areas.
27BR (210 ug/L), and GWA-20BR (257
ug/L). Need revised and detailed discussion
The variability in local boron concentrations
about where the bedrock unit is impacted by
along the western edge of the AAB and the
CCR and its likely origin based on the
differences in boron concentrations between
presence, thickness, and level of
the S and the D layers is noted. The
contamination of flow units between the
calibration and zoned approach of the flow
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impacted bedrock and the source. This is
and transport model accounts for local
needed to understand contaminant transport
differences such as these. These factors are
downgradient and corrective action design.
considered in the corrective action design.
DEQ Comment 59.
Sections 6.1, 6.10, and 6.19
This comment is acknowledged.
Pages 10-21 to 10-23 provide assessments
and conclusions of impact in other source
The CAP presents a comprehensive
areas based on water types and boron above
Tables 6-7, 7-7, and 8-7
understanding of the results of the
or below 700 ug/L. Need revised and
investigations performed at the site,
detailed discussion, by individual source
including the elements required by 02L
area, about where impacts occur based on
.0106. The CAP Update contains the
both water type and boron below 700 ug/L.
information required in the DEQ provided
Discussion needs to include a) locations
Corrective Action Plan Content for Duke
(well IDs) with a CCR water type (e.g. Ca-
Energy Coal Ash Facilities with results and
SO4-0) but no boron, b) locations (well IDs)
discussions of the required items presented
with background water type (e.g. Ca-HCO3)
by source area.
and moderate boron levels, and c) why
these apparent anomalies occurred.
A refined understanding of groundwater COI
Discussion needs to also include the likely
extent is presented in the CAP Update. The
origin of the CCR contamination based on
CAP Update presents discussions on the
the presence, thickness, and level of
extents of COI distribution, including the
contamination of flow units between the
following for each individual source area
impacted well and the source. This is
(Sections 6.1, 6.10, and 6.19) :
needed to understand contaminant transport
0 a discussion of the properties of the
downgradient and corrective action design.
source material
• the extent of COI migration
• the applicable COIs
• the horizontal and vertical extent of
COIs
• and a discussion of the COI
distribution in groundwater,
including plume behavior and
stability
Data from the geomeans tables are used in
evaluating COI plume geometry in the
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vicinity of the AAB. Of 14 inorganic
groundwater COIs (not including pH)
identified in the CSA (CSA Update, 2018),
three COIs (chromium (total), chromium
(hexavalent), and total radium) exhibit
mean concentrations that are currently less
than the background value, 02L standard, or
IMAC at the compliance boundary, or have
few concentrations greater than comparison
criteria but with no discernable COI plume
characteristics (e.g. hexavalent chromium in
the bedrock flow zone). These constituents
are not expected to migrate distances that
would present risk to potential receptors or
beyond the compliance boundary, and are
predicted, based on geochemical modeling,
to remain at stable concentrations, typically
less than the background values, the 02L
standard, or IMAC.
Data from the geomeans tables are used in
evaluating COI plume geometry in the
vicinity of the U1-4 AB. Of 14 inorganic
groundwater COIs (not including pH)
identified in the CSA (CSA Update, 2018),
four COIs (chromium (total), chromium
(hexavalent), thallium, and total uranium)
exhibit mean concentrations that are
currently less than the background value,
02L standard, or IMAC at or beyond the
compliance boundary, or have few
concentrations greater than comparison
criteria but with no discernable COI plume
characteristics (e.g. hexavalent chromium in
the bedrock flow zone). These constituents
are not expected to migrate distances that
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would present risk to potential receptors or
beyond the compliance boundary, and are
predicted, based on geochemical modeling,
to remain at stable concentrations, typically
less than the background value, 02L
standard, or IMAC.
Data from the geomeans table are used in
evaluating COI plume geometry in the
vicinity of the U5 AB. Of 14 inorganic
groundwater COIs (not including pH)
identified in the CSA (CSA Update, 2018),
four COIs (arsenic, thallium, vanadium, and
total uranium) exhibit mean concentrations
that are currently less than the background
value, 02L standard, or IMAC at the
compliance boundary. These constituents
are not expected to migrate distances that
would present risk to potential receptors or
beyond the compliance boundary, and are
predicted, based on geochemical modeling,
to remain at stable concentrations, typically
less than the background value, 02L
standard, or IMAC.
Updated groundwater piper diagrams and
discussion are also presented in the CAP
Update.
The flow and transport model accounts for
site conditions affecting flow and transport
of modeled constituent. This includes
physical properties of the S, D, and BR
layers. The model also accounts for the
existing concentrations and the extent and
thickness CCR material and the partitioning
of these constituents over time. The
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calibration and zoned approach of the flow
and transport model accounts for local
differences such as these. These factors are
considered in the corrective action design.
DEQ Comment 60.
This comment is acknowledged.
For each source area, consider providing a
Figures 6-18a/b/c, 6-47a/b/c, and 6-75a/b/c
map of locations with "no apparent CCR
impacts" based (only) on an evaluation of
Boron isoconcentration maps are provided in
boron concentrations and water type. This
the CAP Update. These figures depict where
would help provide an understanding of the
boron concentration are greater than
occurrence and transport of high
background values (50 ug/Q and also depict
concentrations (above 2L/IMAC/BTVs) of
where boron is not reported at
geochemically-mediated COIs and how those
concentrations greater than background
relate to areas of obvious CCR impacts and
values ("no apparent CCR impacts").
areas of questionable CCR impacts. It would
be especially valuable to superimpose a
Appendix H
The requested figures in the comment with
color -shaded isoconcentration map of pH
superimposed color -shaded isoconcentration
and Eh ranges across each source area. The
maps of pH and Eh ranges across each
purpose is to understand the factors that led
source area were attempted to be
to elevated levels of geochemically-mediated
constructed. However, it was not possible to
COIs across a given source area, levels that
make these figures due to heterogeneities at
make occur in isolated pockets. This
the site. Thus, the geochemical model
discussion and mapping could be included in
the geochemical model report.
(Appendix H) uses the 1-D transect models
and variable pH/EH batch models to
interpret how COIs geochemical behavior
changes with respect to changes in pH and
Eh.
DEQ Comment 61.
Sections 6.2.2, 6.11.2, and 6.20.2
This comment is acknowledged.
Page 10-28 states that "All of the private
water supply wells are upgradient and the
The CAP Update provides an updated
reported exceedances likely reflect natural
evaluation of analytical results in samples
variations or local groundwater conditions,
collected from private water supply wells
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well construction, and/or maintenance".
near CSS. This evaluation is presented in
Need a single definitive discussion about
CAP Update Sections 6.2.2 (AAB and ASA),
potential CCR impacts to supply wells in one
6.11.2 (U1-4 AB), and 6.20.2 (U5 AB). A
section of the report.
well -by -well summary of COI exceedances
and characterization is provided in CAP
Update Table 6-9. The findings of the water
supply well evaluation found that no private
drinking water wells are impacted by COIs
attributable to the CSS ash basins.
In addition the review of current and historic
results from off -site water supply wells,
predictive flow and transport modeling found
that Site -related COIs will not affect off -Site
water supply wells. Using empirical Site
data, groundwater flow and transport
modeling simulations support groundwater
flow is away from water supply wells and
that there are no exposure pathways
between the groundwater flow -through the
ash basin and the pumping wells used for
water supply in the vicinity of the Cliffside
site.
Domestic and public water supply wells are
outside, or upgradient of the groundwater
flow system containing the ash basins and
ASA. Domestic water supply wells are not
affected by constituents released from the
ash basins or ASA or by the different closure
options, according to groundwater flow and
transport model simulations.
Based on predicted groundwater flow
patterns, under post ash basin closure
conditions, and the location of water supply
wells in the area, groundwater flow direction
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from the ash basins is expected to be further
contained within the stream valley and
continue flowing north of the ash basin
footprints, and therefore will not flow
towards any water supply wells.
DEQ Comment 62.
Appendix H, Attachment G
A presentation and discussion of the data
Need presentation and discussion of the bi-
collected during ash excavation at Units 1-4
weekly data collected during ash excavation
inactive basin is presented in Appendix H,
at Units 1-4 inactive basin. Discussion
Attachment G.
needs to focus on any changes in water
levels and geochemical conditions during
and after ash excavation.
DEQ Comment 63.
Sections 6.1, 6.10, and 6.19
This comment is acknowledged.
Section 11.1 (Plume Physical
Characterization) states on page 11-1 that
Boron concentrations that are greater than
"The detection of boron at concentrations in
background values are used as an indication
groundwater greater than applicable 2L
of impacted groundwater throughout the
standards and PBTVs best represents the
CAP Update. The CAP Update does not refer
leading edge of the CCR-derived plume
to a specific concentration of boron as an
moving downgradient from the source
indicator of CCR impacts.
areas': This statement needs to be revised
to acknowledge that boron concentrations
A detailed discussion about where the
above 2L (700 ug/L) have nothing to do with
groundwater is impacted by CCR and its
the plume's "leading edge'.
likely origin based on the presence,
thickness, and level of contamination
reported in the flow layers is provided in the
CAP Update Sections 6.1, 6.10, and 6.19.
These sections contain discussions, by
source area, on plume behavior and stability
and contain discussion on the comparison of
COI concentrations to regulatory standards.
DEQ Comment 64.
Sections 6.1, 6.10, and 6.19
This comment is acknowledged.
Section 11.1 is mostly a data summary with
little or no analysis, context, or significance
Tables 6-7, 7-7, and 8-7
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provided. Discussion is needed, by source
The CAP presents a comprehensive
area, to explain why concentrations occur in
understanding of the results of the
one area and not in another based. This
investigations performed at the site,
should be based on an understanding of
including the elements required by 02L
local flow directions (analyses need to focus
.0106. The CAP Update contains the
on boron data along a singular flow path),
information required in the DEQ provided
flow unit thicknesses and properties that
Corrective Action Plan Content for Duke
may be affecting boron transport, source
Energy Coal Ash Facilities with results and
variability (ash and pore water) that may be
discussions of the required items presented
impacting contaminant concentrations in
by source area.
various downgradient locations differently,
and locations of recharge (percolating
A refined understanding of groundwater COI
infiltration or lateral inflow of groundwater),
extent is presented in the CAP Update. The
whether clean, contaminated, or mixed, that
CAP Update presents these discussions and
may be impacting contaminant
results by individual source area.
concentrations in various downgradient
locations differently. Well IDs and data need
A refined understanding of groundwater COI
to be included in the discussion. Need
extent is presented in the CAP Update. The
discussion to focus on understanding
CAP Update presents discussions on the
contaminant transport and whether the
extents of COI distribution, including the
plume is expanding or moving and, if so,
following for each individual source area
how and where.
(Sections 6.1, 6.10, and 6.19) :
• a discussion of the properties of the
source material
• the extent of COI migration
• the applicable COIs
• the horizontal and vertical extent of
COIs
• and a discussion of the COI
distribution in groundwater,
including plume behavior and
stability
In addition to these discussions, the factors
noted in the comment are addressed in the
flow and transport model, as discussed in
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previous comments. The CAP Update also
performed an evaluation of plume stability in
the MNA report (Appendix 1).
DEQ Comment 65.
Appendix I, Figures 5-4 through 5-63
This comment is acknowledged.
Section 11.1. If an analysis or interpretation
is based on wells that are not on the same
The distance versus concentration and time
flow path then it should be assumed that the
versus concentration figures presented in
analysis is flawed (e.g. according to
the MNA report (Appendix I) and their
potentiometric maps in figs. 6-16 to 6-20,
interpretation are based on wells that are
MW-20DR is not on the same flow path as
located on the same flow paths.
GWA-21BRU; GWA-29D is not on the same
flow path as IB-3D; U5-2BR is not on the
same flow path as MW-38BR; etc). The
interpretations need to be revised
accordingly.
DEQ Comment 66.
Figures 5-4a, 5-4b, 5-4c and 5-5a, 5-5b, 5-
This comment is acknowledged.
Pages 11-3, 11-4, 11-5, 11-7, and 11-8
5c
state that certain cross -sections (A -A, K-K,
Figures 6-2, 6-4, 6-41, and 6-66
Cross sections A -A', K-K', H-H', and L-L' are
H-H, and L-L) are transects along the
generally located along flow transects based
plume centerline. Need discussion
on updated groundwater level maps and
explaining what data (well IDs and data)
confirmed by velocity vector maps.
were used as a basis for the statements that
these transects are along the plume
Cross section K-K' from the west side of the
centerline. Analyses based on these
ash stockpile and AB-3 cluster to Suck Creek
transects only make sense if these
and the area west of the creek were
statements are true and, as pointed out
underflow is occurring represent the flow
above, it appears that some wells in the
transect along this cross section. Portions of
cross -sections are not in fact along the
the eastern portion of this cross-section flow
plume centerline,
to the north toward the Broad River. The
groundwater surface on this cross-section is
based on the updated water level maps.
DEQ Comment 67.
Appendix I
This comment is acknowledged.
Page 11-3 states that "While PBTVs could
not be distinguished on these graphs
Revised concentration versus distance
because values differ by flow unit, ..." This
graphs have been provided in the MNA
issue occurs with other similar lots. These
report in the CAP Update. The graphs have
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plots need to be revised and scaled (y-axis)
been revised and scaled to be readable and
to be readable and understandable (perhaps
understandable.
the plots could be stacked by flow unit).
DEQ Comment 68.
Section 5.1.1
This comment is acknowledged.
Page 11-4 states that "Groundwater
elevations are not available for the
Vertical hydraulic gradients are presented
calculation of vertical gradients in the well
Appendix B, Table 3
and discussed in the CAP Update. The
clusters installed near and along the base of
vertical gradients that are available based on
the upstream dam..." Need discussion about
the measured April 2019 water levels are
the implications for these missing elevations
presented in Appendix B, Table 3.
and whether these should be measured.
DEQ Comment 69.
Appendix B, Table 3
This comment is acknowledged.
Page 11-4 states that "Upward hydraulic
vertical gradients are observed upgradient,
This comment is in reference to the AAB.
" Need discussion about why upward
The full sentence in the CSA Update is
vertical gradients are observed upgradient of
"Upward hydraulic vertical gradients are
the basin and why these specific locations
observed upgradient, south, and southwest
run counter to the conceptual model
of the active ash basin." Vertical gradients
regarding vertical gradients across the
were updated with the April 2019 water
facility. Discussion needs to include well
levels.
IDs, WL data, and local geology.
Monitoring well clusters located upgradient
and south and southwest of the AAB include
MW-24, GWA-25, and GWA-26.
The response to Comment 29 (ADDITIONAL
SPECIFIC COMMENTS ON THE CSA UPDATE
REPORT (SYNTERRA, 2018) provides a
response to a comment concerning upward
vertical gradients at wells BG-1 and MW-24.
Well pair GWA-25 (S/D) has a slight upward
vertical gradient (0.0014 ft/ft) with water
levels in the wells reported in Q2 -2019 at
770.63 feet in GWA-25S and 770.63 feet in
GWA-25D. These wells are located
approximately 190 feet southwest of a
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ponded/ash area in the AAB (scaled
distance). The surveyed elevation of that
portion of the basin is 769 feet. This well
pair is located along the crest of a ridge that
extends and rises in elevation to the south
to Prospect Rd. The slight upward gradient
in these wells may be attributable to the
location of the screens relative to the
adjacent topography.
Well pair GWA-26S/D has a vertical gradient
of 0.065 ft/ft with the Q2-2019 water
elevation in GWA-26S measured at 768.01
feet and the water elevation in GWA-26D
measured at 768.36 feet. Well pair CCR-
16S/D is located approximately 140 feet
north-east of GWA-26S/D and has a
downward vertical gradient of 0.0053 feet.
No obvious explanation can be made for the
slight upward vertical gradient at the GWA-
26 location.
DEQ Comment 70.
Figures 6-18a, 6-18b, 6-18c
This comment is acknowledged.
Page 11-4 states that "The horizontal and
Figures 6-8a, 6-9a, 6-10a, 6-11a
vertical extent of the boron plume has been
NCDEQ reviewed the January 31, 2018 CSA
defined at the active ash basin. Further, it
Update report, and in a June 29, 2018 letter
can be concluded that monitoring wells
to Duke Energy, NCDEQ stated that
across the Site are appropriately placed and
sufficient information was provided to allow
screened to the correct elevations to monitor
preparation of this CAP Update.
groundwater quality." Need discussion
describing the basis for this statement,
The CAP presents a comprehensive
particularly given the fact that some wells
understanding of the results of the
are not on flow path, a well had to be
investigations performed at the site,
substituted on a flow path because of a
including the elements required by 02L
missing location, 2L/IMAC/BTV exceedances
.0106. The CAP Update contains the
occur on the compliance boundary in some
information required in the DEQ provided
locations etc.
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Corrective Action Plan Content for Duke
Energy Coal Ash Facilities with results and
discussions of the required items presented
by source area.
The horizontal and vertical extent of the
boron plume at the AAB is presented in plan
view (Figures 6-18a, 6-18b, 6-18c)
and in cross-section on the referenced
figures (Figures 6-8a, 6-9a, 6-10a, 6-
11a) in the Updated CAP.
The monitoring wells were installed at the
depths to monitor groundwater in each of
the flow layers (shallow, deep, and bedrock)
on the site. A consideration during well
installation was to install well screens in the
most permeable material to ensure that the
wells are in the zone of the highest hydraulic
conductivity (transition zone). These zones
with the highest hydraulic conductivity are
the zones with the highest likelihood of COI
movement.
DEQ Comment 71.
Figure 1-2
This comment is acknowledged.
Page 11-4 provides information about Units
1-4 Inactive Ash Basin. Need discussion
Duke Energy's current position is the former
about the fact that a compliance boundary
Units 1-4 ash basin has a compliance
does not exist and implications for 2L
boundary as depicted on Figure 1-2.
compliance.
DEQ Comment 72.
Figures 5-4a, 5-4b, 5-4c
This comment is acknowledged.
Page 11-5 states that "Boron is reported at
concentrations greater than the PBTV but
Section 6.10.2.1
Monitoring wells located at the GWA-14
less than the 2L standard at GWA-14D,
cluster are hydrologically downgradient of
located upgradient and adjacent to the
the gypsum stack -out area and upgradient
basin....': Need discussion explaining the
I
I of the U1-4 AB. Based on groundwater flow
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source of the boron at GWA-14D and
direction, the boron reported at GWA-14 in
implications for understanding contaminant
the shallow and deep monitoring wells is not
transport and corrective action design.
from the U1-4 AB. Based on the mapped
Figure 5-7
boron results in this area, and the
groundwater flow direction, these results are
also not from the flow under Suck Creek
emanating from the AAB. A discussion on
the Piper diagram results for GWA-14D is
provided in Section 6.10.2.1.
Boron is reported in shallow monitoring well
GWA-38S, located between the upgradient
gypsum stack -out area and the GWA-14
cluster. The boron reported in GWA-14S/D
may be originating from the area southwest
of the well cluster. This will be assessed as
part of the gypsum stack -out area CSA due
to NCDEQ on March 31 2020.
DEQ Comment 73.
Appendix C, Table 1
This comment is acknowledged.
Section 11.3 (Pending Investigations)
presents several wells whose analytical
All available groundwater date collected and
results were not available in time for
analyzed through June 31, 2019 is
interpretation in this report. All data
presented in Appendix C, Table 1. This
collected at these wells needs to be
includes data from the newly installed
presented and interpreted.
monitoring wells identified in Section 11.3
of the 2018 CSA Update.
The interpretations and discussions in the
CAP update were developed using these and
previous results as applicable.
DEQ Comment 74.
Appendix I
This comment is acknowledged.
Some of the concentration versus distance
plots in figs. 11-46 to 11-60 are flawed
Updated and revised concentration versus
along with the corresponding interpretations.
distance figures are provided in the MNA
For example, page 11-5 states that
report (Appendix I of the CAP Update).
"Concentrations of each COI versus
The MNA report also includes discussion
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distance] were measured from sampling
about the implications of trends with
conducted September 2015 to August
distance and how this relates to contaminant
2017" Because the plotted concentrations
transport from source to receptor. These
were from wells sampled two years apart, it
discussions also include an evaluation of
is not possible to know whether the trends
plume stability.
are due to distance or time. The plots also
assume that the wells are along a plume
The concentration versus distance plots use
centerline when this is not the case for every
a timeframe that are less than two years
plot (e.g. MW-2DA is not on the same flow
apart.
path as AS-6BRA according to the
potentiometric map of fig. 6-20; similarly,
Transects used for these graphs more
GWA-29 is not on the same flow path as the
closely align to flow paths than the graphs in
other plotted wells). Also, AS-6BRA is not in
the CSA. The AS-1 wells were included on
the source area so the plot makes no sense;
the ASA transect.
using flawed logic, page I1-9 states that
boron (and others) show an increasing
trend, from source to downgradient, in the
bedrock flow unit, but the statement is
based on a source well that is not actually in
the source (AS-6BRA). Plot results, if
accurate, show be accompanied by a
discussion about the implications of trends
with distance and how this relates to
contaminant transport from source to
receptor. Discussion needs to also explain
why AS-1 wells were omitted from the plots
as it is in the heart of the waste area and
could be used to assess spatial variability of
conditions within the waste boundary.
DEQ Comment 75.
Section 6.10 and 6.10.4
This comment is acknowledged.
Page 11-6 states that "The vertical extent of
the plume does not extend into the
Figures 6-47a, 6-47b, and 6-47c
The horizontal and vertical extent of
transition zone or bedrock beneath or
groundwater results greater than
surrounding the Units 1-4 inactive ash basin
comparison criteria associated with the U1-4
at concentrations greater than the 2L
AB is presented in the CAP Update. The
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standard. This statement is incorrect and
extent of the COI distribution for U1-4 AB is
needs to be revised accordingly (see GWA-
discussed in Section 6.10 and the
11BRU, GWA-10D, IB-3D, ...),
horizontal and vertical extent of COIs at this
source area is discussed in Section 6.10.4.
Figures 6-47a, 6-47b, and 6-47c show
the extent of boron concentrations greater
than the background value at the U1-4 AB.
As noted on these figures, boron
concentrations greater than the background
value but less than the 02L standard are
found in the bedrock flow layer and the deep
flow layer.
DEQ Comment 76.
Appendix B, Table 4
This comment is acknowledged.
Page 11-6 also states that "Groundwater
elevations are not available for the
This comment is in reference to vertical
calculation of vertical gradients in the deep
gradients observed near the U1-4 AB.
to bedrock clusters installed near the basin".
Vertical gradients were updated with the
Need discussion of the implications of this
April 2019 water levels and are included in
missing data, whether there is a plan to
the CAP Update. Vertical gradients were
measure the wells, and if not, why not. The
calculated comparing deep to bedrock
report goes on to state that "...upward
groundwater elevations near the U1-4 AB.
gradient exists in upgradient areas,
northwest and southwest of the basin".
Monitoring well cluster GWA-14 is located
Need discussion about what wells this refers
southwest of the U1-4 AB and monitoring
to and why the vertical gradient in these
well cluster GWA-10 is located northwest of
specific locations run counter to the
the basin. The vertical gradient at GWA-
conceptual model of vertical gradients across
14D/BR was neutral (-0.0047) and the
the facility.
vertical gradient reported at the GWA-10
cluster between the shallow and deep
monitoring wells was downward, consistent
with the Site CSM.
DEQ Comment 77.
Figure 1-2
LL
This comment is acknowledged.
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Page 11-6 provides information about Unit 5
Inactive Ash Basin. Need discussion about
Duke Energy's current position is the Unit 5
the fact that a compliance boundary does
inactive ash basin has a compliance
not exist and implications for 2L compliance.
boundary as depicted on Figure 1-2.
DEQ Comment 78.
Figures 6-18a, 6-18b, 6-18c
This comment is acknowledged.
Page 11-6 states where boron is above 2L
Figures 6-47a, 6-47b, and 6-47c
and where it is below 2L but above PBTVs,
Figures 6-75a, 75-b, 75-c
The CAP presents a comprehensive
however, it provides no discussion of actual
understanding of the results of the
concentrations, co-occurring contaminants,
investigations performed at the site,
groundwater flow directions, pore water and
including the elements required by 02L
its spatial variability, or any other context
.0106 and the requirements of the DEQ CAP
related to its movement from the source
Guidance (Corrective Action Plan Content for
area. The discussion needs to provide
Figures 5-4a, 5-4b, 5-4c and 5-5a, 5-5b, 5-
Duke Energy Coal Ash Facilities, April 27,
understanding at a local scale of the factors
5c
2018) and contains sufficient interpretation
that control the movement of the plume or
of the site data to develop a corrective
boron within the plume.
action plan.
Updated boron isoconcentration figures are
presented in the CAP Update. These figures
show horizontal extent of where boron is
greater than the 02L standard and less than
the 02L standard but greater than
Appendix G
background values. The remaining
isoconcentration figures presented in the
CAP report depict where co-occurring COIs
are present within the boron plume.
Updated water level maps with refined
groundwater flow directions are presented in
the CAP Update.
The updated flow and transport model was
developed to include the effects of local
factors controlling the movement of
groundwater and associated COIs. The
updated flow and transport model depicts
where the boron plume is and where it is
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expected to migrate under the closure -in -
place and closure -by -excavation scenarios.
Modeling of the preferred remedial
alternatives is also presented in the updated
flow and transport model, depicting how the
boron plume is expected to be reduced with
the implementation of these technologies.
DEQ Comment 79.
Figure 1-2
This comment is acknowledged.
Page 11-7 states, regarding Unit 5 basin,
that "no shallow well location exists in the
The referenced discussion in CSA Update
downgradient area" Discussion is needed
section is discussing Figures 11-46 through
describing the implications for this and for
11-60, which present concentrations versus
assessing 2L compliance and contaminant
distance plots. This statement in the 2018
transport.
CSA Update is in error. The sentence before
this on page 11-7 states "Wells farthest
downgradient of the ash basin and nearest
the Broad River but within the waste
boundary are GWA-2S for the shallow flow
layer".
DEQ Comment 80.
Section 6.19 and 6.19.4
This comment is acknowledged.
Page 11-7 states that "The vertical extent of
the plume does not extend into bedrock
The horizontal and vertical extent of
beneath or surrounding the Units 5 inactive
groundwater results greater than
ash basin at concentrations greater than the
comparison criteria associated with the U5
2L standard. This statement is incorrect and
AB is presented in the CAP Update. The
needs to be revised accordingly (see MW-38,
extent of the COI distribution for U5 AB is
U5-2BR, U5-4BR, U5-05BR, CCR-U5-05D,
discussed in Section 6.19 and the
GWA-02BR, ...).
horizontal and vertical extent of COIs at this
source area is discussed in Section 6.19.4.
Sulfate and TDS values greater than the 02L
standard are present in bedrock
downgradient of the U5 AB. These
concentrations are localized in the following
wells: CCR-U5-4BR U5-5BR MW-38BR.
DEQ Comment 81.
Appendix B, Table 5
This comment is acknowledged.
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Page 11-7 also states that an upward
Appendix J
gradient exists at MW-37 and MW-38,
This references regarding MW-37 was a typo
"probably due to the Broad River elevation"
as there is not MW-37 will cluster at
Discussion is needed to explain in technical
Cliffside. The text should have stated GWA-
terms what this statement means and
37.
implications for contaminant transport and
risk to receptors.
With regards to the MW-38 and GWA-37 well
clusters, based on the updated vertical
gradients using the April 2019 data, a
downward gradient exists at both of these
well clusters when comparing the shallow
and deep flow layers. Based on the CSM It
is expected that as the groundwater travels
from these monitoring wells toward the
Broad River an upward gradient to the river
would be observed. Based on the steep
terrain between these well clusters and the
Broad River it is not possible to additional
install monitoring wells in this location to
confirm this assumption.
With regards to potential impacts to the
Broad River from groundwater transport
from the U5 AB, surface water sample
results and their associated surface water
bodies are discussed in the current
conditions surface water evaluation and the
future conditions surface water evaluation
presented in Appendix 1. This evaluation
found no current or predicted exceedances
of the 02B standards in the Broad River or
Suck Creek.
DEQ Comment 82.
Figure 1-2
This comment is acknowledged.
Page 11-8 provides information about the
Ash Storage Area. Need discussion about
The compliance boundary for the AAB and
the revised location of the compliance
ASA has been revised since the 2018 CSA
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boundary (just south of AS-7) and
Update report. The revised compliance
implications for 2L compliance.
boundary has been used in the CAP Update
report. This revised compliance boundary
includes revisions to the property boundary
and the compliance boundary northeast of
the AAB downstream dam to account for the
Duke Energy property acquisition in this
location. Compliance with 02L is addressed
at or beyond the revised location of the AAB
compliance boundary as depicted.
DEQ Comment 83.
Figure 5-4a
This comment is acknowledged.
Need discussion about boron exceedances in
CCR-6S located just upgradient of the
The CAP presents a comprehensive
western ash storage area and downgradient
understanding of the results of the
of the active basin, and implications for
investigations performed at the site,
understanding contaminant transport.
Figures 6-18a, 6-18b, 6-18c
including the elements required by 02L
.0106. The CAP Update contains the
information required in the DEQ provided
Corrective Action Plan Content for Duke
Energy Coal Ash Facilities with results and
discussions of the required items presented
by source area. A discussion on the extent
Section 1.5.1
of COIs associated with the AAB is found in
Appendix C, Table 3
CAP Update Section 6.1.
Monitoring well CCR-6S is located on the
downgradient waste boundary of the AAB
and is upstream of the ASA. The generalized
groundwater flow direction from CCR-6S is
to the northwest toward the ASA. As shown
on Figures 6-18a, 6-18b, and 6-18c,
Section 6.1
boron concentrations in the S and D layer
are greater than the 02L standard. The
boron concentrations in these wells would be
from the AAB.
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Impacted groundwater has been identified in
the ash storage area (ASA) (formerly
referred to as the western ash storage area)
beyond the active ash basin (AAB)
compliance boundary located within the
central portion of the ASA.
As described in the CAP Update and in
previous comments, the updated flow and
transport model was developed using
detailed site information, including
properties of aquifer materials in the
transition zone can impact COI movement
locally to account for these considerations in
corrective action design.
The CAP Update proposes an active
remediation system in this area to remediate
groundwater at the AAB and ASA source
area.
DEQ Comment 84.
Figure 1-2
This comment is acknowledged.
Need discussion about spatial data gap east
of AS-8.
Monitoring wells AS-9D and AS-9DR were
installed east of AS-8 to eliminate the former
spatial data gap in this area. Monitoring
results for boron in these wells were less
than the 02L standard show plume is located
west from the AS-9 location and is defined
along the AS-7 and AS-8 flow path.
DEQ Comment 85.
Section 6.1.2
This comment is acknowledged.
Page 11-9 states that "boron is not present
Figure 6-18c
in the bedrock flow layer beneath or
The horizontal and vertical extent of
downgradient of the ash storage area" This
groundwater results greater than
is incorrect (see AS-2BR).
comparison criteria associated with the AAB
and ASA is presented in the CAP Update.
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The boron isoconcentrations in the bedrock
layer for the AAB and ASA are shown on
Figure 6-18c. This figure shows that boron
is present in the bedrock layer beneath and
downgradient of the ASA but no
concentrations are greater than the 02L
standard.
DEQ Comment 86.
Appendix B, Table 3
This comment is acknowledged.
Page 11-9 also states that "In the deep to
bedrock flow layers, the largest downward
Figure 1-2
Updated vertical gradients are presented in
gradient of the Site exists at AS-5.
Appendix B, Table 3 calculated using the
Discussion is needed about why this is
site -wide April 2019 water level elevations.
mentioned or deemed to be important,
Boron results all three wells at this location
particularly given the fact that AS-5 is not
(AS-5S, AS-SBRU, and AS-5BR) are below
inside or downgradient of the source area.
the 50 pg/L MDL for boron. As indicated by
these results, this location is outside of the
closest COI flow path which is located west
of the AS-5 location. The vertical gradient
at AS-5 does not have any relevance related
to the distribution of COIs in this area.
DEQ Comment 87.
Figures 6-2 through 6-5, 6-40, 6-41 and 6-
This comment is acknowledged.
Page 11-9 states that "Transects planned for
64 through 6-66
use in the geochemical model are slightly
The cross sections provided in the 2018 CSA
different than those shown in cross-section
Update report were based discussions with
on the figures." Discussion is needed about
and agreed upon with NCDEQ. These cross
why this is the case, why the cross section
sections were oriented along groundwater
on the figures used the wells that it used,
flow paths, cross -cutting flow paths and in
and implications for understanding
some cases generally perpendicular to
contaminant transport.
groundwater flow paths. These cross
sections were intended for visualization of
subsurface conditions and not meant to
correspond to geochemical transects.
Updated cross sections are provided in the
CAP Update.
Appendix H
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Transects used for geochemical modeling
were identified to focus on specific areas of
interest to optimize the geochemical
evaluation. The Flow and Transport Models
were used to determine the most
appropriate flow paths to use when
determining geochemical modeling
transects. These locations do not necessary
correspond directly to the cross sections in
the 2018 CSA Update as the geochemical
transects were identified to correspond with
groundwater flow paths generally exhibiting
the greatest COI concentrations.
DEQ Comment 88.
Appendix H
The Unit 5 Transect was revised with input
Page 11-10 discusses the wells used for
from the Flow and Transport Modeling Team
geochemical modeling flow path transects.
and NCDEQ to include:
U5-4 is not along the same flow path as U5-
7 according to potentiometric maps in figs.
U5-2S/SLA 4 U5-3D 4 GWA-2BR
6-16, 6-18, and 6-20. The same is true of
CCR-12 and AB-2. Need discussion about
this apparent discrepancy and implications
Cross-section figures including flow vector
for modeling and understanding contaminant
arrows provided by the Flow and Transport
transport.
Model Outputs are included in the main body
of the Geochemical Modeling Report
(Appendix H
DEQ Comment 89.
This comment is acknowledged.
Page 11-10 states generically that "There
Figure 1-2
are 10 wells located perpendicular to the
The monitoring wells that are located
proposed centerlines of flow for the Unit 5
perpendicular to the proposed centerline of
inactive ash basin" Need well IDs and a
Appendix B, Table 8
flow for the U5 AB are: CCR-U5-2D, U5-
map showing the wells, local groundwater
4S/D/BR/BRA, CCR-U5-3S/D, U5-5D/BR,
flow directions, and potentiometric contours.
CCR-U5-5D, and GWA-3D. The locations of
the monitoring wells are presented on
Figure 1-2 and included in Appendix B,
Table 8.
11
Figures 5-5a 5-5b 5-5c.
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Updated groundwater level maps for the U5
AB are provided as Figures 5-5a, 5-5b,
and 5-5c. These figures depict
potentiometric contours and groundwater
flow directions based on the contours.
DEQ Comment 90.
Appendix G
This comment is acknowledged.
Page 11-10 states that "One notable
exception [to concentrations decreasing
This monitoring well (CCR-U5-4D) is located
away from the source area] is seen at CCR-
at the toe of the U5 AB main dam and
U5-4D which has the highest concentration
screened in the transition zone. Consistent
of boron for this source area" Need
with the CSM, the flow -through ash basin
discussion about why this is the case and
system should result in low to non -
implications for understanding contaminant
detectable COI concentrations in
transport.
groundwater underlying previously saturated
ash within the basin except near the dam
where downward vertical hydraulic gradients
would have occurred. The boron
concentration reported in CCR-U5-4D
confirm this aspect of the CSM.
The updated flow and transport model is
presented in Appendix G of the CAP
Update. The boron extent in this area is not
predicted to extend further to the north of
the AAB main dam than is currently reported
with the empirical data and is not predicted
not to reach the compliance boundary.
DEQ Comment 91.
Appendix B, Table 7
This comment is acknowledged.
Page 11-10 states that "Of the 11 wells
along the two centerlines of flow for this
A list of wells and sample events that were
source area, two wells have zero valid
excluded from the CAP evaluation are
sampling events (GWA-2BR and U5-2S-
presented in Appendix B, Table 7.
SLA).... " Similarly, U5-5BR and U5-4BRA
have had zero valid sampling events, and
Newly installed wells boring logs and well
AB-3SLA, AB-3BRUA, AB-3BR, and AS-7BRA
construction records are included in
have had zero valid sampling events. Need
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discussion explaining the implications of this
Appendix P, including any replacement
and how and when these data gaps will be
wells that have been installed.
filled.
In the June 29, 2018 letter to Duke Energy,
NCDEQ stated that sufficient information
was provided to allow the preparation of this
CAP Update (Appendix A). Duke Energy
agrees with NCDEQ's statement that
sufficient data is available for the
preparation of this CAP Update, even though
certain wells have limited data.
DEQ Comment 92.
Appendix H
During previous geochemical modeling
Page 11-11 states that "The active ash basin
discussions with NCDEQ and Bill Deutsch, it
- west transect begins at two side gradient
was discussed that the models should focus
wells with elevated concentrations of several
on areas with realistic flow paths so that the
COIs." Need discussion explaining why the
model predictions can be qualitatively
transect begins in side gradient wells as
"validated" by comparing the simulated
opposed to heart -of -source wells, why COIs
trends in groundwater data against empirical
are elevated in the side gradient wells, and
trends in groundwater data. The AAB-West
whether COIs are higher in heart -of -source
Transect has been updated since the 2018
locations and implications for understanding
CSA Update Report with input from the
contaminant transport.
revised flow and transport models.
The revised AAB-West Transects are as
follows:
Upper Flow Path = AB-3S 4 CCR-8D 4
GWA-20D
Lower Flow Path = AB-3SL 4 AB-2BRO
These revisions include source inputs which
can be classified as "heart -of -source" wells.
These transects were discussed and agreed
upon with the NCDENR ARO. Plan -view and
cross -sections of the revised transects are
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presented in Geochemical Modeling Reports
(Appendix H).
DEQ Comment 93.
Appendix H
The geochemical transects modeled in the
Page 11-11 states that "Maximum
Appendix H of the CAP Update were revised
concentrations of boron along this flow path
once the updated flow and transport model
are located at CCR-12S for the shallow flow
Appendix G
was available to support the transect
layer, GWA-27DA for the deep flow layer,
evaluation.
and GWA-27BR for the bedrock layer" This
is a summary of data observations but does
Boron was modeled using the flow and
not explain why this is the case or
transport model, not the geochemical model
implications for contaminant transport.
as presented in the CAP Update (Appendix
Need discussion to address this.
G). The flow and transport model supported
by empirical data has not identified the
location west of the AAB as having current
or predicted boron concentrations greater
than the 02L standardard at or beyond the
compliance boundary in this area of the Site.
DEQ Comment 94.
Appendix G
This comment is acknowledged.
Page 11-11 states that ".... the total vertical
length of ash in borings along the transect
The geochemical transects discussed in the
are as follows:...." Need discussion
2018 CSA Update report were identified to
explaining the significance of these
correspond with groundwater flow paths
thicknesses, spatial variations, adequacy of
generally exhibiting the greatest COI
boring density, and how the findings relate
concentrations and assumed a transect
to pore water results and downgradient
modeling approach which constrained
concentrations. One generic sentence was
groundwater flow to a singular flow zone for
used to address this which stated "this
each transect flow path. These transects
heterogeneous nature of the ash storage
were chosen prior to completion of the
area can account for the minor fluctuations
Preliminary Flow and Transport Models. This
in concentrations along the flow path." Need
statement was originally intended to address
specificity, well IDs and data, etc.
the heterogeneity within the source area
along a flow transect beginning at the AB-3
well cluster and ending at the AS-2 well pair
The geochemical transects presented in the
CAP Update were revised using the Flow and
Transport Model to determine the most
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appropriate transect flow paths for each
source area.
The revised ASA Transect is split into two
flow paths, the ASA Upper flow path and the
ASA lower flow path. The wells along each
transect flow path are presented below:
• ASA Upper - CCR-7S 4AS-1SB 4AS-2S
• ASA Lower - CCR-8D-->CLMW-3D 4 AS-
2D
DEQ Comment 95.
Figure 1-2
This comment is acknowledged.
Page 11-12, regarding the ash storage area
transect, states generically that "There are
The monitoring wells that are located
12 wells perpendicular to the centerline of
perpendicular to the proposed centerline of
flow for the ash storage area transect"
flow for the ASA are: CLMW-1, CLMW-3S/D,
Need well IDs and a map showing the wells,
CLMW-2, MW-25DR, AS-5S/BRU/BR, CCR-
local groundwater flow directions, and
6S/D, and GWA-29D/BR/BRA. The locations
potentiometric contours.
of the monitoring wells are presented on
Figure 1-2.
Figures 5-4a, 5-4b, 5-4c.
Updated groundwater level maps for the ASA
are provided as Figures 5-4a, 5-4b, 5-4c.
These figures depict potentiometric contours
and groundwater flow directions based on
the contours.
DEQ Comment 96.
Figure 1-2
This comment is acknowledged.
Page 11-12, regarding the active ash basin -
east transect, states generically that "There
The monitoring wells that are located
are 12 wells perpendicular to the centerline
perpendicular to the proposed centerline of
of flow for the ash storage area transect"
flow for the AAB east transect are: CCR-
Need well IDs and a map showing the wells,
313R, GWA-28S/BRU/BR, MW-4D, MW-
local groundwater flow directions, and
20D/DR, GWA-22S/BRU, and MW-
potentiometric contours.
11S/D/DA/BRO. The locations of the
monitoring wells are presented on Figure 1-
Figures 5-4a, 5-4b, 5-4c.
2.
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Updated groundwater level maps for the AAB
are provided as Figures 5-4a, 5-4b, 5-4c.
These figures depict potentiometric contours
and groundwater flow directions based on
the contours.
DEQ Comment 97.
Sections 6.2.2.1, 7.2.2.1, and 8.2.2.1
This comment is acknowledged.
Section 11.2 (Plume Chemical
Characterization) summarizes COIs across
The CAP presents a comprehensive
the facility and provides facility -wide ranges
understanding of the results of the
and numbers of detections. Need discussion
Figures 6-17 through 6-28, 6-46 through 6-
investigations performed at the site,
of specific details by source area including
56b, and 6-75a through 6-85
including the elements required by 02L
well IDs and transport characteristics from
.0106 and the requirements of the DEQ CAP
source to receptor.
Guidance (Corrective Action Plan Content for
The section also discusses primary
Appendix H, Appendix G
Duke Energy Coal Ash Facilities, April 27,
attenuation mechanisms in a generic
2018) and contains sufficient interpretation
textbook sense but did not provide relevant
of the site data to develop a corrective
and specific details by source area to explain
action plan.
the transport or lack of transport in "hot"
areas of the sites. Need discussion
A refined understanding of groundwater COI
addressing this.
extent is presented in the CAP Update. The
CAP Update presents discussions on the
extents of COI distribution, including the
following for each individual source area
(Sections 6.1, 6.10, and 6.19) :
• a discussion of the properties of the
source material
• the extent of COI migration
• the applicable COIs
• the horizontal and vertical extent of
COIs
• and a discussion of the COI
distribution in groundwater,
including plume behavior and
stability
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COI extent for each individual source area is
presented in the CAP Update. The CAP
Update also presents the potential receptors
associated with each source area.
The updated isoconcentration figures depict
the distribution of COIs per source area.
The flow and transport model (Appendix G)
report and the geochemical model report
(Appendix H) discuss site -specific
attenuation mechanisms and factors
affecting them based on source area specific
flow transects.
DEQ Comment 98.
Appendix H
This comment is acknowledged.
Page 11-15 states generically that "Goldberg
(1997) lists aluminum and iron oxides,
The CAP Update provides a geochemical
magnesium hydroxide, clay minerals,
model report (Appendix H) that provides
calcium carbonate (limestone), and organic
specific discussions on the modeling results
matter as important sorption surfaces in
by source area. The model uses procedures
soils (Goldberg, 1997)" Similarly, on page
and transects based on discussions and
11-17 the report generically states that
comments provided by with DEQ.
"Chromium mobility depends on sorption
characteristics of the soil, including clay
The revised geochemical model does
content, iron, and manganese oxide content
consider ion exchange with clays and
and the amount of organic matter present."
sorption to aluminol sites. The aluminol sites
Rather than generics, need discussion, by
can be considered as octahedral edge sites
source area and using specific well IDs and
of clay minerals. Therefore, sorption to clays
data, about the extent to which this is
is explicitly being accounted for in the
affecting contaminant transport in "hot"
revised model. Organic matter content will
areas of the sites.
be considered on a well by well basis to
explain potential hot spots. Organic matter
can both enhanced or retard mobility based
on the pH of the system and the sorption
affinity of the organic matter.
Page 143

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS••
DEQ Comment 99.
Appendix H
This comment is acknowledged.
Page 11-18 states that "Despite the low
The CAP Update provides a geochemical
apparent mobilization percentage, iron is
model report (Appendix H) that provides
often one of the COIs detected in the highest
specific discussions on the modeling results
concentrations in ash pore water. The
by source area. The model uses procedures
extent to which iron dissolves in water
and transects based on discussions and
depends on the amount of oxygen present in
comments provided by with DEQ.
the water, and to a lesser extent, upon its
degree of acidity (Stumm & Morgan, 1996).
Provided some oxygen is present to maintain
Need discussion, by source area and using
Fe(III), pH is the primary control of
specific well IDs and data, about the extent
dissolved Fe(III) concentrations due to the
to which local geochemical conditions are
hydrolysis (e.g., acidity) of Fe(III). Solubility
causing iron dissolution and thus affecting
of iron effectively decreases monotonically
dissolved iron distribution in "hot" areas of
with respect to pH from 4 to 8, coupled with
the sites.
precipitation of ferrihydrite. The simulated
redox speciation from PHREEQC is compared
with site specific data to evaluate elevated
dissolved Fe concentrations in "hot" areas.
DEQ Comment 100.
Appendix E
This comment is acknowledged.
Page 12-1. Need to compare the data
collected since the report was submitted to
The CAP Update contains an updated risk
the risk assessment criteria to ensure that
assessment incorporates results from
the risk assessment is up to date.
surface water, sediments, and groundwater
samples collected March 2015 through June
2019.
Primary conclusions from the risk
assessment update include: (1) the ash
basins do not cause an increase in risks to
potential human receptors located on -Site or
off -Site; and (2) the ash basins do not cause
an increase in risks to ecological receptors.
DEQ Comment 101.
Appendix E
This comment is acknowledged.
Page 12-1 states that "AOW locations are
outside the scope of this risk assessment
Page 144

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS•
because AOWs, wastewater, and wastewater
Because AOWs are currently being
conveyances (discharge canals) are
addressed in NPDES permits or the SOC,
evaluated and governed wholly separate in
exposure to AOWs by trespassers and
accordance with the NPDES Program
commercial/industrial workers was not
administered by NCDEQ DWR. Page 12-3
evaluated, although the associated exposure
states that "Samples collected at the
pathways are considered complete; wildlife
locations SW-BRAB-2 and SW-BRAB-3 were
exposure to AOWs was also not subject to
not considered in this risk assessment
the updated risk assessment.
update because of their proximity to an
NPDES outfall on the Broad River" Page 12-
6 states that samples in Exposure Areas 3
and 4 were limited to AOW samples and
AOW samples were not evaluated for risk
because they are included under the NPDES
program. However, all AOW locations need
to be included in the risk assessment, not
for 2B compliance, but to allow the Division
Director to properly evaluate all factors
pursuant to 02L .0106 (i), which includes
"risk" for purposes of CAP approval.
DEQ Comment 102.
Appendix E
This comment is acknowledged.
The risk assessment needs to be re-
evaluated once sediments in the Broad River
The updated risk assessment incorporates
are collected (see page 11-31).
results from surface water, sediments, and
groundwater samples collected March 2015
through June 2019.
Primary conclusions from the risk
assessment update include: (1) the ash
basins do not cause an increase in risks to
potential human receptors located on -Site or
off -Site; and (2) the ash basins do not cause
an increase in risks to ecological receptors.
DEQ Comment 103.
Appendix E
This comment is acknowledged.
Page 12-3 states that "Samples with
turbidity greater than turbidity of 25 NTUs
Page 145

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS•
were also omitted from this [risk
Samples with turbidity greater than 25 NTUs
assessment] evaluation". The risk
were not included in the risk assessment, as
assessment needs to be re-evaluated using
they are not representative of actual
turbid samples.
exposure. The updated human health and
ecological risk assessment is included as
Appendix E. Surface water samples
evaluated as part of the risk assessment are
described in the updated risk assessment.
DEQ Comment 104.
Appendix E
This comment is acknowledged.
Page 12-3 stated that "On -site surface water
sample locations included in this assessment
Surface water samples evaluated as part of
were SW-3 and SW-4 from Suck Creek and
the risk assessment contained in the CAP
47 additional surface water samples
Update are described in the updated risk
collected in 2016-2017 from the Broad River
assessment. Samples associated with areas
and Suck Creek" The risk assessment
of wetness (AOWs) associated with
needs to include the NCDENR surface water
engineered structures, also referred to as
locations collected in March 2014.
"constructed seeps," are being addressed in
National Pollutant Discharge Elimination
System (NPDES) permits and are not subject
to the updated risk assessment due to the
permitted status. Other AOWs (non -
constructed seeps) are addressed under a
Special Order by Consent (SOC) issued by
the North Carolina Environmental
Management Commission and therefore are
also not subject to this risk assessment
update. Samples not collected under the
CAMA sampling and assessment program
were not included in the evaluation since
sampling methodologies and QA/QC results
are not documented and may not be
consistent with sampling protocols followed
for the CAMA assessment.
DEQ Comment 105.
Appendix E
This comment is acknowledged.
Page 146

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS•
A table is needed that summarizes the risks
An updated human health and ecological risk
(specific bird or mammal) associated with
assessment is included in the CAP Update.
each source area and why the risk was
identified (specific contaminant and sample
The ecological risk assessment evaluated
location).
areas on and off -Site where wildlife
would likely be exposed to coal ash
constituents that might have migrated from
the ash basins through groundwater or
surface water features. The assessment
evaluated four ecological exposure areas, as
described in Appendix E Section 2.3.6.
Figure 5 (Appendix E) shows the location
of these exposure areas.
Appendix E Section 6.1.3 contains a
discussion on the selection of ecological
receptors of interest.
DEQ Comment 106.
Section 1.3
This comment is acknowledged.
Page 12-7 states that "This update to the
human health and ecological risk assessment
In accordance with G.S. Section 130A-
supports a risk classification of'low"for
309.211(c1) of House Bill 630 (2016) Duke
groundwater related consideration".
Energy connected 65 eligible households to
Discussion is needed providing the technical
the public water supply at occupied
and administrative basis for this conclusion
residences within a 0.5-mile radius of the
and why the 'low risk" is suggested for the
ash basin compliance boundaries. This,
facility as a whole rather than individual
along with certain improvements to the CSS
source areas each of which will require a
dams completed by Duke Energy, resulted in
closure plan.
the ash basins (AAB, U1-4 AB, and U5 AB)
being ranked as low -risk.
On November 13, 2018, the NCDEQ
confirmed that Duke Energy had established
permanent water supplies for surrounding
properties by August 31, 2018, and rectified
prior dam safety deficiencies. NCDE
Page 147

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS•
provided final classification of the AAB, U1-4
AB and the U5 AB as "low -risk".
DEQ Comment 107.
Appendix G
This comment is acknowledged.
Page 13-1 states that "Once the flow,
transport, and geochemical models for the
The flow and transport modeling prepared
Site accurately reproduce observed Site
for DEQ groundwater modeling meeting on
conditions, they can be used as predictive
October 15th, 2018 included a calibrated
tools...."
hydraulic heads model, boron calibration,
For each source area, the models should be
and closure scenarios. The preliminary
able to simulate with reasonable certainty
modeling report was completed by
contaminant concentrations at shallow,
November 15th, 2018 and included a
deep, and bedrock wells with exceedances of
hydraulic head calibration, sensitivity
2L11MAC/BTVs. That is, target wells need to
analysis, boron calibration, and three closure
be in "hot" areas of each source area. ARO
scenarios. The targeted wells have been
requests that preliminary results of
calibrated to the COIs and will be submitted
simulated versus observed concentrations at
with the CAP Update.
target wells, along with quantitative
sensitivity analyses, be provided at least 60
days prior to CAP submittal. This will allow
time for the Division to approve the selected
target wells and the models' ability to
simulate observed concentrations prior to
their use as predictive tools during CAP and
closure designs.
DEQ Comment 108.
Appendix H
This comment is acknowledged.
Page 13-5. The geochemical model report
needs to show the distribution of Eh and pH
The pH and EH values for each flow unit are
across each flow unit and source area.
overlain in Pourbaix diagrams to facilitate
direct comparison between the dominant
chemical species of each COI and the
geochemical conditions. Additionally, the
distribution of pH and EH values including
the relevant statistics (averages, standard
deviations, geomeans) are also provided.
These values are used to define the range of
Page 148

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS•
pH and EH values to examine in transect
models.
DEQ Comment 109.
Figures 6-2 through 6-5, 6-40, 6-41, and 6-
This comment is acknowledged.
Page 14-3 states that "The horizontal
64 through 6-66
gradients, horizontal hydraulic conductivity,
Saprolite and transition zone thicknesses at
and seepage velocities indicate that most of
each source area are presented in cross
the groundwater flow occurs through the
Appendix F
sections in the CAP Update.
transition zone and bedrock, as most of the
regolith encountered downgradient of the
Bedrock fracture discussion per source area
basin is thin and less likely to be saturated".
is presented in the Bedrock evaluation report
Need discussion about saprolite thickness
(Appendix F) and specifies borehole
and bedrock fracturing in individual source
locations where in -situ fracture orientation
areas. Discussion should include specific
data, hydraulic conductivity profiles and
well IDs and mapping and needs to focus on
bedrock matrix samples were collected.
"hot" areas of concern. To justify the
statement, the discussion needs to include
The layers used in the flow and transport
the relative volumes of flow expected to
model were developed from site boring logs
occur in fractures in a given area versus the
and represent the thicknesses of the various
volume of flow expected to occur through
layers across the site. The process of
the porous saprolite in that area. The need
calibrating the model to site groundwater
is to understand the nature of contaminant
levels would account for varying properties
transport in specific areas rather than
including thickness and hydraulic
"generally" across the facility. This is
conductivity. The hydraulic conductivity of
particularly important given the significant
the bedrock layer was used to represent
geologic variability from area to area.
bedrock fractures.
As described in Section 4.1 of the model
report (Appendix G):
The model varies in thickness from
approximately 600 feet to 650 feet and
consists of 28 horizontal layers, including 2
layers representing the saprolite layer, 3
representing the transition zone, and 12
representing the bedrock layer.
Page 149

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS••
The minimum horizontal grid spacing in the
finely divided areas is approximately 30 feet,
while the maximum grid spacing near the
outer edges of the model is approximately
160 feet. The grid contains a total of
731,868 active cells in 28 layers.
The model was calibrated to both
groundwater elevations and to boron
concentrations in monitoring wells.
The model discretization and calibration
process provides predictions that consider
conditions at each source area and allows
understanding of groundwater flow and COI
transport across the source areas.
DEQ Comment 110.
This comment is acknowledged
Page 14-20 provides cursory trend analysis
and references figures that show
The CAP presents a comprehensive
contaminant concentration trends across the
understanding of the results of the
facility. Need discussion, by source area and
investigations performed at the site,
using specific well IDs and data, explaining
including the elements required by 02L
the implications of the observed spatial and
.0106 and the requirements of the DEQ CAP
temporal trends, whether they represent
Guidance (Corrective Action Plan Content for
plume movement and (or) expansion, and if
Duke Energy Coal Ash Facilities, April 27,
so how that affects understandings of plume
2018) and contains sufficient interpretation
extent, 2L compliance, and corrective action
of the site data to develop a corrective
design.
action plan.
As noted in previous responses, the CAP
Update contains updated trend analyses that
were performed on groundwater data from
wells in each of the individual source area.
The CAP Update and supporting Appendices
Page 150

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS••
presents discussions and data by individual
source area. The MNA report, Appendix ],
includes updated trend analyses, including
statistical trend analyses of concentrations
along pertinent cross sections along with
discussions of contaminant behavior.
DEQ Comment 111.
This comment is acknowledged.
Section 15.0 (Conclusions and
Recommendations) contains a number of
The proceeding comments have been
conclusions that appear to be in error or
addressed in the responses noted above.
partial error. The preceding comments
address these.
DEQ Comment 112.
This comment is acknowledged.
Section 15.5.1 (CAP Preparation Process)
describes what the CAP will include but does
The CAP presents a comprehensive
not mention that additional analysis in
understanding of the results of the
individual source areas is needed. It needs
investigations performed at the site,
to be acknowledged that the factors
including the elements required by 02L
affecting contaminant transport are needed
.0106 and the requirements of the DEQ CAP
in support of CAP and closure design.
Guidance (Corrective Action Plan Content for
Duke Energy Coal Ash Facilities, April 27,
2018) and contains sufficient interpretation
of the site data to develop a corrective
action plan. As required in the DEQ CAP
Guidance, this information is presented in
the CAP Update by source area. The
corrective action evaluated and proposed in
the CAP Update considered the factors
affecting groundwater flow, COI transport,
and potential impact to receptors.
DEQ Comment 113.
This comment is acknowledged.
The Executive Summary contains statements
that appear to be in error or partial error.
The proceeding comments have been
The above comments address these.
addressed in the responses noted above
Page 151

Appendix B Comprehensive Site Assessment Update Report
CSA Update Report Draft Comments And Responses December 2019
Cliffside Steam Station
SynTerra
CSA UPDATE REPORT DETAILED
CAP SECTION
RESPONSE • DEQ COMMENT
COMMENTS••
DEQ Comment 114.
This comment is acknowledged.
The report failed to include several elements
specifically requested in the CSA Content
In a letter from NCDEQ to Duke Energy
document of July 18, 2017 provided to Duke
dated June 29, 2018, NCDEQ stated that
prior to the 7121117 CSA Guideline meeting.
sufficient information had been provided in
The above comments address these.
the 2018 CSA Update to allow preparation
for the CAP Update.
The proceeding comments have been
addressed in the responses noted above.
Page 152

APPENDIX B, TABLE 1
UNIT 5 INACTIVE ASH BASIN WHITE SUBSTANCE OBSERVATION DATES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION - UNIT 5 MAIN DAM
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Date
Areas of
gray and
white
seepage
still
appearing
No white
or gray
seepage
observed
Notes
8/18/2015
x
Seepage appeared similar to previous inspections
8/25/2015
x
Same as above
9/1/2015
x
Same as above
9/8/2015
x
Slightly more white seepage than last inspection
9/15/2015
x
Slightly less white seepage than last inspection
9/22/2015
x
White seepage similar to to previous inspection
9/29/2015
x
Same as above
10/5/2015
x
10/6/2015
x
10/ 13/2015
x
10/20/2015
x
White seepage observed
10/27/2015
x
Same as above
10/28/2015
x
Same as above
11/3/2015
x
Seepage observed to have white material
11/10/2015
x
Same as above
11/17/2015
x
Same as above
11/24/2015
x
Same as above
12/1/2015
x
Same as above
12/8/2015
x
Same as above
12/15/2015
x
Same as above
12/22/2015
x
Same as above
12/29/2015
x
Unable to observe seepage due to Broad River backed up to toe of dam
1/12/2016
x
White material observed
1/19/2016
x
Same as above
1/26/2016
x
Same as above
2/2/2016
x
Same as above
2/9/2016
x
Same as above
2/16/2016
x
Same as above
2/23/2016
x
Different inspector -Discolored seepage was not apparent during visit
3/1/2016
x
White material observed
3/8/2016
x
Same as above
3/15/2016
Different inspector did not note if white seepage present
3/22/2016
x
White material observed
3/29/2016
x
Same as above
4/5/2016
x
Same as above
4/12/2016
x
Same as above
4/13/2016
x
Same as above
4/20/2016
x
Same as above
4/27/2016
x
Same as above
5/4/2016
x
Same as above
5/11/2016
No inspection report for main dam
5/18/2016
x
White material observed
5/25/2016
x
Same as above
6/1/2016
x
Same as above
6/8/2016
x
Page 1 of 4

APPENDIX B, TABLE 1
UNIT 5 INACTIVE ASH BASIN WHITE SUBSTANCE OBSERVATION DATES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION - UNIT 5 MAIN DAM
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Date
Areas of
gray and
white
seepage
still
appearing
No white
or gray
seepage
observed
Notes
6/15/2016
x
6/22/2016
x
White material observed
6/29/2016
x
Same as above
7/6/2016
x
7/13/2016
x
White material observed
7/20/2016
x
Same as above
7/27/2016
x
Same as above
8/3/2016
x
Same as above
8/10/2016
x
8/17/2016
x
8/24/2016
x
White material observed
8/31/2016
x
Same as above
9/7/2016
x
Same as above
9/14/2016
x
Same as above
9/21/2016
x
Little to no white material observed
9/28/2016
x
Same as above
10/5/2016
x
Same as above
10/12/2016
x
Same as above
10/19/2016
x
Same as above
11/2/2016
x
White material observed
11/9/2016
x
11/16/2016
x
11/23/2016
x
11/30/2016
x
12/7/2016
x
12/ 14/2016
x
12/21/2016
x
12/28/2016
x
1/4/2017
x
1/11/2017
x
1/18/2017
x
1/25/2017
x
2/1/2017
x
2/8/2017
x
2/15/2017
x
2/22/2017
x
3/1/2017
x
3/8/2017
x
3/15/2017
x
3/22/2017
x
3/29/2017
x
4/6/2017
x
4/12/2017
x
4/19/2017
x
4/26/2017
x
Page 2 of 4

APPENDIX B, TABLE 1
UNIT 5 INACTIVE ASH BASIN WHITE SUBSTANCE OBSERVATION DATES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION - UNIT 5 MAIN DAM
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Date
Areas of
gray and
white
seepage
still
appearing
No white
or gray
seepage
observed
Notes
5/3/2017
x
5/10/2017
x
White material observed
5/17/2017
x
Same as above
5/24/2017
x
Same as above
5/31/2017
x
Same as above
6/7/2017
x
Same as above
6/14/2017
x
Same as above
6/21/2017
x
Same as above
6/28/2017
x
Same as above
7/5/2017
x
Same as above
7/12/2017
x
Same as above
7/19/2017
x
Same as above
7/26/2017
x
Same as above
8/2/2017
x
Same as above
8/9/2017
x
Same as above
8/16/2017
x
Same as above
8/23/2017
x
Same as above
8/30/2017
x
Same as above
9/6/2017
x
Same as above
9/13/2017
x
Same as above
9/20/2017
x
Same as above
9/27/2017
x
Same as above
10/4/2017
x
Same as above
10/11/2017
x
Same as above
10/18/2017
x
Same as above
10/25/2017
x
Same as above
11/1/2017
x
Same as above
11/8/2017
x
Same as above
11/15/2017
x
Same as above
11/21/2017
x
Same as above
11/28/2017
x
Same as above
11/29/2017
x
Same as above
12/6/2017
x
Same as above
12/13/2017
x
Same as above
12/20/2017
x
Same as above
12/27/2017
x
Same as above
1/3/2018
x
Same as above
1/10/2018
x
Same as above
1/17/2018
x
Same as above
1/24/2018
x
Same as above
1/31/2018
x
Same as above
2/7/2018
x
Same as above
2/14/2018
x
Same as above
2/21/2018
x
Same as above
2/28/2018
x
Same as above
Page 3 of 4

APPENDIX B, TABLE 1
UNIT 5 INACTIVE ASH BASIN WHITE SUBSTANCE OBSERVATION DATES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION - UNIT 5 MAIN DAM
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Date
Areas of
gray and
white
seepage
still
appearing
No white
or gray
seepage
observed
Notes
3/7/2018
x
Same as above
3/14/2018
x
Same as above
3/21/2018
x
Same as above
3/28/2018
x
Same as above
4/4/2018
x
Same as above
4/11/2018
x
Same as above
4/18/2018
x
4/25/2018
x
5/2/2018
x
White material observed
5/9/2018
x
Same as above
5/16/2018
x
Same as above
5/23/2018
x
5/30/2018
Unable to observe -river up
6/6/2018
x
6/13/2018
x
6/20/2018
x
6/27/2018
x
7/4/2018
x
7/11/2018
x
White material observed
7/18/2018
x
Same as above
7/25/2018
x
Same as above
7/31/2018
x
8/7/2018
x
8/14/2018
x
8/21/2018
x
8/28/2018
x
9/4/2018
x
9/11/2018
x
9/18/2018
x
9/25/2018
x
10/2/2018
x
10/9/2018
x
10/16/2018
x
White material observed
10/23/2018
x
Same as above
10/30/2018
x
11/6/2018
x
11/13/2018
x
11/20/2018
x
11/27/2018
x
12/3/2018
x
12/ 11/2018
x
12/ 18/2018
x
12/20/2018
x
12/27/2018
1
Ix
Prepared by: TJG Checked by: SAS
Page 4 of 4

APPENDIX B, TABLE 2
HORIZONTAL HYDRAULIC GRADIENTS AND FLOW VELOCITIES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Shallow Flow Zone
Source Area
Upgradient
Well ID
Upgradlent
Groundwater Elevation (ft)
Downgradient
Well ID
Downgradient
Groundwater
Elevation (ft)
K
(ft/day)3
Ah
(ft)
Al
(ft)°
n` 3
V.
(ft/day)
V.
(ft/yr)
Gradient
(Ah/AI)
Active Ash Basin East
MW-11S
736.06
GWA-22S
657.79
0.1
78.27
450
0.3
0.058
21.2
0.17
Active Ash Basin North
CCR-7S
751.64
AS-2S
675.39
0.1
76.25
975
0.3
0.026
9.5
0.08
Active Ash Basin West
AB-8S
761.90
GWA-20S
727.83
0.1
34.07
655
0.3
0.017
6.3
0.05
Active Ash Basin South*
-
-
-
-
-
-
-
-
-
-
-
Former Units 1-4 Ash Basin*
GWA-14S
DRY
CCR-IB-3S
662.06
0.1
-
920
0.3
-
-
-
Unit 5 Inactive Ash Basin East
US-6S
718.36
GWA-37S
670.54
0.1
47.82
870
0.3
0.018
6.7
0.05
Unit 5 Inactive Ash Basin West
U5-25-SLB
743.35
GWA-2S
675.01
0.1
68.34
810
0.3
0.028
10.3
0.08
Shallow Flow Zone
Geometric Mean 0.03 9.7 0.08
Average 0.03 10.8 0.09
Deep Flow Zone Deep Flow Zone
Source Area
Upgradient
Well ID
Upgradient
Groundwater
Elevation' (ft)
Downgradient
Well ID
Downgradient
Groundwater
Elevation' (ft)
K
(ft/day)3
Ah
(ft)
Al
(ft)4(ft/day)
3
ne
v,
vs
(ft/yr)
Gradient
(Ah/Al)
Active Ash Basin East
AB -ID
711.84
MW-20D
658.95
0.1
52.89
480
0.3
0.037
13.4
0.11
Active Ash Basin North
CLMW-3D
730.22
AS-2D
668.34
0.1
61.88
630
0.3
0.033
12.0
0.10
Active Ash Basin West
AB-8BRU
761.45
GWA-20D
724.03
0.1
37.42
655
0.3
0.019
7.0
0.06
Active Ash Basin South
AB-6D
765.09
GWA-47D
761.37
0.1
3.72
630
0.3
0.002
0.7
0.01
Former Units 1-4 Ash Basin
GWA-14D
682.66
CCR-IB-3D
661.07
0.1
21.59
920
0.3
0.008
2.9
0.02
Unit 5 Inactive Ash Basin East
US-6D
718.83
GWA-37D
674.48
0.1
44.35
870
0.3
0.017
6.2
0.05
Unit 5 Inactive Ash Basin West
U5-2D
737.39
GWA-2BRU
672.98
0.1
64.41
810
0.3
0.027
9.7
0.08
Deep Flow Zone
Geometric Mean 0.01 5.4 0.04
Average 0.02 7.4 0.06
Bedrock Flow Zone Bedrock
Source Area
Upgradient
Well ID
Upgradient
Groundwater
Elevation' (ft)
Downgradient
Well ID
Downgradient
Groundwater
Elevation' (ft)
K
(ft/day)3
Ah
(ft)
Al
(ft)4
3
n`
V.
(ft/day)
V.
(ft/yr)
Gradient
(Ah/AI)
Active Ash Basin East
AB-SBROR
712.48
MW-20DR
665.38
0.1
47.10
480
0.01
0.98
358.2
0.10
Active Ash Basin North
AB-7BR
759.73
AS-2BR
660.13
0.1
99.60
1255
0.01
0.79
289.7
0.08
Active Ash Basin West
AB-3BR
759.69
GWA-20BR
729.52
0.1
30.16
1085
0.01
0.28
101.5
0.03
Active Ash Basin South*
-
-
-
-
-
-
-
-
-
-
-
Former Units 1-4 Ash Basin
GWA-14BR
682.32
CCR-IB-3BR
661.65
0.1
20.67
920
0.01
0.220.02
Unit 5 Inactive Ash Basin East
GWA-3IBR-A
711.51
MW-38BR
669.02
0.1
42.49
1205
0.01
0.35
128.7
0.04
Unit 5 Inactive Ash Basin West
U5-2BR
735.62
GWA-2BRA
672.84
0.1
62.78
1 810
0.01
0.78
282.9
0.08
Notes:
* - Calculations were not performed due to insufficient data in the area or a dry well
- Groundwater elevation shown corresponds to water levels collected in April 2019
z - Value based on Preliminary Updated Groundwater Flow and Transport Modeling Report for Cliffside Steam Station, Mo-bom, NC, November 2019 (SynTerra)
3 - Approximate length between an upgradient and downgradient groundwater well
dh/dl - horizontal hydraulic gradient (ft/ft)
DRY - dry well
ft - feet
K - horizontal hydraulic conductivity
I - horizontal distance between wells
e - effective porosity
v, - horizontal seepage velocity
Ah - difference in water level height between upgradient and downgradient locations
Al - horizontal distance between upgradient and downgradient locations
Bedrock Flow Zone
Geometric Mean 0.49 178 0.05
Average 0.57 207 0.06
Prepared by: TCP Checked by: GTC
FTrrVW-TM

APPENDIX B, TABLE 3
VERTICAL HYDRAULIC GRADIENTS - ACTIVE ASH BASIN AND ASH STORAGE AREA
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Well ID
Monitoring
Zone
Screened Interval'
(Feet-BGS)
Mid -Point of
Screened Interval
(Feet-BGS)
Water Level
Elevation
Q2-2019
Vertical Gradient
(dh/dl)
and Flow Direction
Background Locations
BG-1S
Shallow
20.0
35.0
27.5
781.93
0.01
Downward
BG-1D
Deep
66.5
71.5
69.0
781.61
BG-1D
Deep
66.5
71.5
69.0
781.61
0.01
Upward
BG-1BRA
Bedrock
93.0
98.0
95.5
781.84
MW-24D
Deep
33.2
53.0
43.1
803.46
0.10
Upward
MW-24DR
Bedrock
60.3
105.1
82.7
807.48
GWA-24S
Shallow
14.0
24.0
19.0
778.79
0.14
Upward
GWA 24D
Deep
28.0
33.0
30.5
780.42
GWA-24D
Deep
28.0
33.0
30.5
780.42
0.15
Upward
GWA-24BR
Bedrock
65.0
70.0
67.5
785.80
GWA-25S
Shallow
10.0
25.0
17.5
770.63
0.00
Horizontal
GWA-25D
Deep
36.5
41.5
39.0
770.66
Within the Waste Boundary
AB-1S
Shallow
54.0
69.0
61.5
733.54
0.35
Downward
AB-1D
Dee
121.5
126.5
124.0
711.84
AB-2S
Shallow
44.0
49.0
46.5
742.30
0.26
Downward
AB-2D
Dee
72.5
77.5
75.0
734.87
AB-3-MA15
Ash Pore Water
56.2
61.2
58.7
761.47
0.01
Upward
AB-3SL
Ash Pore Water
62.2
72.2
67.2
761.53
AB-3SL
Ash Pore Water
62.2
72.2
1 67.2
761.53
0.00
Horizontal
AB-3I
Shallow
92.0
102.0
97.0
761.65
AB-3I
Shallow
92.0
102.0
97.0
761.65
1.62
Downward
AB-3BRUA
Deep
125.0
130.0
127.5
712.10
AB-3BRUA
Deep
125.0
130.0
127.5
712.10
0.90
Upward
AB-3BR
Bedrock
175.5
185.5
180.5
759.69
AB-4S
Ash Pore Water
5.0
20.0
1 12.5
760.45
0.01
Upward
AB-4SL
Ash Pore Water
28.7
38.7
33.7
760.63
AB-4-UA15
Ash Pore Water
14.9
19.9
17.4
760.24
0.02
Upward
AB-4-LA15
Ash Pore Water
32.4
37.4
34.9
760.57
AB-4SL
Ash Pore Water
28.7
38.7
33.7
760.63
0.01
Upward
AB-413
Deep
55.0
60.0
57.5
760.92
AB-413
Deep
55.0
60.0
57.5
760.92
0.10
Downward
AB-4BR
Bedrock
104.5
109.5
107.0
756.18
AB-5S
Ash Pore Water
5.0
20.0
12.5
763.64
-0.02
Downward
AB-5BRU
Deep
60.5
65.5
63.0
764.49
AB-5BRU
Deep
60.5
65.5
63.0
764.49
0.06
Upward
AB-5BR
Bedrock
91.2
96.1
93.7
762.68
AB-6S
Ash Pore Water
5.0
20.0
12.5
764.36
0.01
Upward
AB-613
Deep
65.8
70.8
68.3
765.09
AB-613
Deep
65.8
70.8
68.3
765.09
0.17
Downward
AB-6BR
Bedrock
96.0
101.0
98.5
760.00
AB-7S
Ash Pore Water
47.0
57.0
52.0
760.96
0.13
Downward
AB-7BRU
Deep
147.0
157.0
152.0
747.90
AB-7BRU
Deep
147.0
157.0
152.0
747.90
0.31
Upward
AB-7BR
Bedrock
185.5
195.5
190.5
759.73
AB-8S
Ash Pore Water
12.5
22.5
17.5
761.90
0.00
Horizontal
AB-8I
Shallow
57.0
67.0
62.0
761.68
AB-8I
Shallow
57.0
67.0
62.0
761.68
0.01
Downward
AB-8BRU
Deep
87.0
97.0
92.0
761.45
AB-8BRU
Deep
87.0
97.0
92.0
761.45
0.00
Horizontal
AB-8BR
Bedrock
117.0
122.0
119.5
761.52
AB-9S
Ash Pore Water
14.0
24.0
19.0
760.29
0.00
Horizontal
AB-913
Deep
57.5
67.5
62.5
760.17
AB-913
Deep
57.5
67.5
62.5
760.17
0.01
Downward
AB-9BR
Bedrock
109.0
119.0
114.0
759.65
Page 1 of 3

APPENDIX B, TABLE 3
VERTICAL HYDRAULIC GRADIENTS - ACTIVE ASH BASIN AND ASH STORAGE AREA
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Well ID
Monitoring
Zone
Screened Interval'
(Feet-BGS)
Mid -Point of
Screened Interval
(Feet-BGS)
Water Level
Elevation
Q2-2019
Vertical Gradient
(dh/dl)
and Flow Direction
Between Waste Boundary and Compliance Boundary
Upgradient of the Ash Basin
MW-21D
Deep
6.6
21.2
13.9
773.71
0.15
Downward
MW-21BR
Bedrock
81.1
86.1
83.6
763.21
Downgradient of the Ash Basin
CCR-3BR
Bedrock
51.5
56.5
54.0
723.81
0.04
Downward
GWA-64BRL
Bedrock
225.0
235.0
230.0
717.54
CCR-6S
Shallow
29.0
44.0
36.5
759.29
0.01
Downward
CCR-6D
Deep
58.5
63.5
61.0
758.96
CCR-7S
Shallow
34.5
49.5
42.0
751.64
0.03
Upward
CCR-7D
Deep
86.0
91.0
88.5
753.07
CCR-8D
Deep
44.5
49.5
47.0
760.65
0.01
Downward
CCR-8BR
Bedrock
80.4
85.4
82.9
760.36
CCR-9D
Deep
22.5
27.5
25.0
735.79
0.11
Downward
GWA-65BR
Bedrock
66.1
76.1
71.1
730.60
GWA-65BR
Bedrock
66.1
76.1
71.1
730.60
0.03
Upward
GWA-65BRL
Bedrock
350.0
360.0
355.0
738.85
CCR-11S
Shallow
4.5
20.0
12.3
730.51
0.05
Upward
CCR-11D
Deep
24.5
29.5
27.0
731.21
CCR-12S
Shallow
33.0
48.0
40.5
738.92
0.00
Downward
CCR-12D
Deep
59.0
64.0
61.5
738.85
CCR-12D
Deep
59.0
64.0
61.5
738.85
0.06
Downward
CCR-12BR
Bedrock
100.0
105.0
102.5
736.21
CCR-12BR
Bedrock
100.0
105.0
102.5
736.21
0.07
Upward
GWA-66BRL
Bedrock
254.0
274.0
264.0
748.18
CCR-16S
Shallow
18.0
33.0
25.5
766.52
0.01
Downward
CCR-16D
Deep
63.0
68.0
65.5
766.31
GWA-20S
Shallow
4.5
19.5
12.0
727.83
0.25
Downward
GWA-20D
Deep
25.0
30.0
27.5
724.03
GWA-20D
Deep
25.0
30.0
27.5
724.03
0.19
Upward
GWA-20BR
Bedrock
54.0
59.0
56.5
729.52
GWA-26S
Shallow
10.2
25.2
17.7
768.01
0.01
Upward
GWA-26D
Deep
68.6
73.8
71.2
768.36
GWA-27DA
Deep
51.0
56.0
53.5
755.78
0.02
Upward
GWA-27BR
Bedrock
103.9
108.9
106.4
756.85
GWA-28S
Shallow
22.5
37.5
30.0
726.46
0.26
Downward
GWA-28BRU
Deep
53.9
58.9
56.4
719.55
GWA-28BRU
Deep
53.9
58.9
56.4
719.55
0.18
Downward
GWA-28BR
Bedrock
85.0
90.0
87.5
713.85
GWA-43S
Shallow
6.0
21.0
13.5
718.11
0.27
Downward
GWA-43D
Deep
42.5
47.5
45.0
709.46
GWA-57S
Shallow
14.0
19.0
16.5
718.19
0.58
Downward
GWA-57BRU
Deep
36.0
46.0
41.0
704.06
GWA-57BRU
Deep
36.0
46.0
41.0
704.06
0.15
Downward
GWA-57BR
Bedrock
76.0
86.0
81.0
697.99
GWA-58S
Shallow
4.8
14.8
9.8
717.35
0.08
Downward
GWA-58BRU
Deep
31.0
36.0
33.5
715.37
GWA-58BRU
Deep
31.0
36.0
33.5
715.37
0.21
Downward
GWA-58BR
Bedrock
76.0
86.0
81.0
705.26
GWA-59S
Shallow
17.4
22.4
19.9
731.62
0.18
Downward
GWA-59D
Deep
36.2
46.2
41.2
727.88
GWA-59D
Deep
36.2
46.2
41.2
727.88
0.01
Upward
GWA-59BR
Bedrock
73.9
78.9
76.4
728.08
GWA-63S
Shallow
46.0
51.0
48.5
764.79
0.05
Downward
GWA-63BRU
Deep
66.0
76.0
71.0
763.57
MW-8S
Shallow
2.9
17.9
10.4
730.14
0.13
Downward
MW-8D
Deep
29.8
34.8
32.3
727.27
MW-10S
Shallow
19.7
34.7
27.2
758.18
0.01
Downward
MW-10D
Deep
32.8
37.8
35.3
758.09
MW-11S
Shallow
15.0
30.0
22.5
736.06
0.07
Downward
MW-11DA
Deep
45.0
50.0
47.5
734.26
MW-11DA
Deep
45.0
50.0
47.5
734.26
0.11
Downward
MW-11BRL
Bedrock
295.2
305.2
300.2
706.67
Page 2 of 3

APPENDIX B, TABLE 3
VERTICAL HYDRAULIC GRADIENTS - ACTIVE ASH BASIN AND ASH STORAGE AREA
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Well ID
Monitoring
Zone
Screened Interval'
(Feet-BGS)
Mid -Point of
Screened Interval
(Feet-BGS)
Water Level
Elevation
Q2-2019
Vertical Gradient
(dh/dl)
and Flow Direction
Beyond Compliance Boundary
Downgradient of the Ash Basin
AS-1SB
Shallow
83.0
98.0
90.5
733.39
0.07
Downward
AS-113
Deep
106.0
111.0
108.5
732.21
AS-2S
Shallow
15.5
30.5
23.0
675.39
0.20
Downward
AS-213
Deep
55.0
60.0
57.5
668.34
AS-213
Deep
55.0
60.0
57.5
668.34
0.22
Downward
AS-2BR
Bedrock
92.0
97.0
94.5
660.13
AS-4S
Shallow
84.4
94.4
89.4
745.77
0.20
Upward
AS-4D
Dee
95.0
100.0
97.5
747.42
AS-5S
Shallow
29.3
44.3
36.8
704.90
0.10
Downward
AS-5BRU
Deep
55.0
60.0
57.5
702.77
AS-5BRU
Deep
55.0
60.0
57.5
702.77
0.14
Upward
AS-5BR
Bedrock
75.1
80.1
77.6
705.61
AS-6S
Shallow
86.0
101.0
93.5
725.04
0.01
Downward
AS-613
Deep
123.0
128.0
125.5
724.74
AS-6D
Deep
123.0
128.0
125.5
724.74
0.01
Upward
AS-6BRA
Bedrock
153.5
158.5
156.0
725.04
AS-7S
Ash Pore Water
28.5
43.5
36.0
714.50
0.39
Downward
AS-7I
Shallow
57.0
62.0
59.5
705.23
AS-7I
Shallow
57.0
62.0
59.5
705.23
0.14
Upward
AS-71)
Deep
82.5
87.5
85.0
708.84
AS-71)
Deep
82.5
87.5
85.0
708.84
0.50
Downward
AS-7BRB
Bedrock
111.0
121.0
116.0
693.28
AS-8S
Ash Pore Water
23.0
38.0
30.5
704.65
0.31
Downward
AS-81)
Deep
62.9
67.9
65.4
693.83
AS-81)
Deep
62.9
67.9
65.4
693.83
2.15
Downward
AS-8BR
Bedrock
90.0
100.0
95.0
630.32
AS-913
Deep
34.0
44.0
39.0
704.32
1.01
Downward
AS-9BR
Bedrock
79.4
89.4
84.4
658.59
CLMW-3S
Shallow
49.0
59.0
54.0
730.27
0.00
Horizontal
CLMW-3D
Deep
93.0
103.0
98.0
730.22
GWA-21S
Shallow
5.5
15.5
10.5
662.82
0.08
Downward
GWA-21BRU
Deep
20.0
25.0
22.5
661.92
GWA-21BRU
Deep
20.0
25.0
22.5
661.92
0.27
Upward
GWA-21BR
Bedrock
60.6
65.6
63.1
672.98
GWA-22S
Shallow
2.6
12.6
7.6
657.79
0.18
Downward
GWA-22BRU
Deep
17.0
22.0
19.5
655.67
MW-20D
Deep
6.5
21.5
14.0
658.95
0.27
Upward
MW-20DR
Bedrock
12.5
62.5
37.5
665.38
MW-23S
Shallow
10.0
25.0
17.5
718.11
0.03
Downward
MW-23D
Deep
36.0
46.0
41.0
717.47
MW-23D
Deep
36.0
46.0
41.0
717.47
0.02
Upward
MW-23DR
Bedrock
45.0
95.0
70.0
718.17
GWA-33S
Shallow
5.0
15.0
10.0
719.59
0.05
Downward
GWA-33D
Deep
26.0
31.0
28.5
718.70
GWA-33D
Deep
26.0
31.0
28.5
718.70
0.28
Downward
GWA-33BR
Bedrock
85.0
90.0
87.5
702.11
GWA-54S
Shallow
37.0
52.0
44.5
721.57
0.03
Upward
GWA-54D
Dee
107.0
112.0
109.5
723.52
GWA-54D
Deep
107.0
112.0
109.5
723.52
0.01
Downward
GWA-54-BRO
Bedrock
112.0
175.0
143.5
723.08
GWA-62BRU
Deep
22
27
24.5
726.76
1.49
Downward
GWA-62BR
Bedrock
56
66
61.0
672.54
Notes:
' - Values measured during well installation
BGS - Below ground surface
dh - difference in water level elevation
dl - difference in mid -point of screen length
NAVD 88 - North American Vertical Datum 1988
Q2 2019 water level data collected April 22, 2019
Prepared by: TCP Checked by: GTC
Page 3 of 3

APPENDIX B, TABLE 4
VERTICAL HYDRAULIC GRADIENTS - FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Well ID
Monitoring
Zone
Screened
Interval'
(Feet-BGS)
Mid -Point of
Screened
Interval
(Feet-BGS)
Water Level
Elevation
Q2-2019
Vertical Gradient
(dh/dl)
and Flow Direction
Background Locations
GWA-30S
Shallow
17.5
27.5
22.5
785.12
0.28
Downward
GWA-30BR
Bedrock
65.0
70.0
67.5
772.44
MW-30S
Shallow
32.7
47.7
40.2
794.27
0.02
Downward
MW-30D
Deep
86.1
91.1
88.6
793.21
MW-32S
Shallow
20.0
35.0
27.5
813.25
-0.04
Upward
MW-32D
Deep
48.5
53.5
51.0
814.27
MW-32D
Deep
48.5
53.5
51.0
814.27
-0.05
Upward
MW-32BR
Bedrock
62.5
72.5
67.5
815.10
Between Waste Boundary and Compliance Boundary
Upgradient of the Former Units 1-4 Ash Basin
GWA-14D
Deep
48.0
53.0
50.5
682.66
0.00
Horizontal
GWA-14BR
Bedrock
118.5
128.5
123.5
682.32
Downgradient of the Former Units 1-4
Ash Basin
GWA-10S
Shallow
12.0
27.0
19.5
661.23
-0.01
Upward
GWA-10D
Deep
47.6
52.6
50.1
661.62
GWA-12S
Shallow
19.0
34.0
26.5
692.76
0.37
Downward
GWA-12BRU
Deep
48.0
53.0
50.5
683.92
Beyond Compliance Boundary
Downgradient of the Former Units 1-4
Ash Basin
CCR-IB-1S
Shallow
6.0
16.0
11.0
661.10
-0.03
Upward
CCR-IB-iD
Deep
20.0
25.0
22.5
661.39
CCR-IB-3S
Shallow
12.0
27.0
19.5
662.06
0.05
Downward
CCR-IB-3D
Deep
38.0
43.0
40.5
661.07
CCR-IB-3D
Deep
38.0
43.0
40.5
661.07
-0.02
Upward
CCR-IB-3BR
Bedrock
69.9
74.9
72.4
661.65
GWA-11S
Shallow
12.0
27.0
19.5
661.20
0.01
Downward
GWA-11BRU
Deep
37.0
42.0
39.5
661.04
GWA-11BRU
Deep
37.0
42.0
39.5
661.04
0.02
Downward
GWA-11BR
Bedrock
69.1
74.1
71.6
660.52
GWA-11BR
Bedrock
69.1
74.1
71.6
660.52
-0.04
Upward
GWA-11BRL
Bedrock
171.0
181.0
176.0
664.35
GWA-29D
Deep
20.5
25.5
23.0
658.93
-0.17
Upward
GWA-29BRA
Bedrock
48.4
58.4
53.4
664.08
GWA-32D
Deep
35.0
40.0
37.5
671.33
-0.01
Upward
GWA-32BR
Bedrock
60.0
65.0
62.5
671.49
IB-6S
Shallow
20.5
30.5
25.5
658.71
0.00
Horizontal
IB-6D
Deep
51.2
56.2
53.7
658.70
IB-7S
Shallow
39.8
44.8
42.3
662.72
-0.02
Upward
IB-7D
Dee
19.6
29.6
24.6
662.40
Notes:
1 - Values measured during well installation
BGS - Below ground surface
dh - difference in water level elevation
dl - difference in mid -point of screen length
NAVD 88 - North American Vertical Datum 1988
Q2 2019 water level data collected April 22, 2019
Prepared by:TCP Checked by: GTC
Page 1 of 1

APPENDIX B, TABLE 5
VERTICAL HYDRAULIC GRADIENTS - UNIT 5 INACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Well ID
Monitoring
Zone
1
Screened Interval
(Feet-BGS)
Mid -Point of
Screened
Interval
(Feet-BGS)
Water Level
Elevation
Q2-2019
Vertical Gradient
(dh/dl)
and Flow Direction
Background Locations
CCPMW-1S
Shallow
30.0
40.0
35.0
845.57
0.01
Downward
CCPMW-1D
Deep
49.0
54.0
51.5
845.33
GWA-30S
Shallow
17.5
27.5
22.5
785.12
0.21
Downward
GWA-30BRU
Deep
38.0
43.0
40.5
781.25
GWA-30BRU
Deep
38.0
43.0
40.5
781.25
0.33
Downward
GWA-30BR
Bedrock
65.0
70.0
1 67.5
772.44
MW-30S
Shallow
32.7
47.7
40.2
794.27
0.06
Downward
MW-30DA
Deep
87.0
82.0
84.5
791.48
MW-32S
Shallow
20.0
35.0
27.5
813.25
0.04
Upward
MW-32D
Deep
48.5
53.5
51.0
814.27
MW-32D
Deep
48.5
1 53.5
51.0
1 814.27
0.07
Upward
MW-32BR
Bedrock
60.0
65.0
62.5
815.10
Within the Unit 5 Inactive Ash Basin Waste Boundary
U5-1S
Shallow
39.0
54.0
46.5
762.45
0.06
Downward
U5-1D
Deep
55.0
60.0
57.5
761.83
U5-2S-SLB
Shallow
51.0
66.0
58.5
743.35
0.37
Downward
U5-2D
Deep
72.0
77.0
74.5
737.39
U5-2D
Deep
72.0
77.0
74.5
737.39
0.06
Downward
U5-2BR
Bedrock
100.3
105.3
102.8
735.62
U5-4S
Shallow
59.8
74.8
67.3
714.22
0.08
Downward
U5-4D
Deep
104.2
109.2
106.7
711.16
U5-4D
Deep
104.2
109.2
106.7
711.16
-1.32
Upward
U5-4BRA
Bedrock
129.0
139.0
134.0
747.31
U5-5BD
U5-5BR
Deep
Bedrock
65.5
105.5
69.5
110.5
67.5
108.0
707.71
703.31
0.11
Downward
U5-6S
Shallow
37.0
52.0
44.5
718.36
0.03
Upward
U5-6D
Deep
56.5
61.5
59.0
718.83
U5-8S
Shallow
5.0
20.0
12.5
764.75
0.03
Downward
U5-8D
Deep
71.0
76.0
73.5
762.85
U5-8D
Deep
71.0
76.0
73.5
762.85
0.08
Upward
U5-8BR
Bedrock
1 120.9
1 125.9
123.4
1 767.03
Between Waste Boundary and Compliance Boundary of the Unit 5 Active Ash Basin
Sidegradient of the Unit 5 Active Ash Basin
CCR-U5-10S
Shallow
18.0
28.0
23.0
763.14
0.00
Horizontal
CCR-U5-10D
Deep
36.0
41.0
38.5
763.09
GWA-5S
Shallow
14.0
29.0
21.5
756.20
0.04
Downward
GWA-5BRU
Deep
40.0
45.0
42.5
755.35
Downgradient of the Unit 5 Active Ash Basin
CCR-U5-3S
Shallow
7.0
17.0
12.0
689.69
0.43
Downward
CCR-U5-3D
Deep
22.0
27.0
24.5
684.34
CCR-U5-3D
Deep
22.0
27.0
24.5
684.34
0.11
Upward
GWA-67BR
Bedrock
106.5
121.5
114.0
694.31
GWA-67BR
Bedrock
106.5
121.5
114.0
694.31
0.02
Downward
GWA-67BRL
Bedrock
169.6
179.6
174.6
692.88
CCR-U5-4S
Shallow
10.0
25.0
17.5
681.42
0.00
Horizontal
CCR-U5-4D
Deep
31.0
36.0
33.5
681.45
CCR-U5-4D
Deep
31.0
36.0
33.5
681.45
0.13
Upward
CCR-U5-4BR
Bedrock
79.8
84.8
82.3
687.79
CCR-U5-4BR
Bedrock
1 79.8
1 84.8
1 82.3
1 687.79
0.02
Upward
GWA-68BRL
Bedrock
350.0
360.0
355.0
694.33
Page 1 of 2

APPENDIX B, TABLE 5
VERTICAL HYDRAULIC GRADIENTS - UNIT 5 INACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Well ID
Monitoring
Zone
1
Screened Interval
(Feet-BGS)
Mid -Point of
Screened
Interval
(Feet-BGS)
Water Level
Elevation
Q2-2019
Vertical Gradient
(dh/dl)
and Flow Direction
CCR-U5-6S
Shallow
6.0
16.0
11.0
709.89
0.01
Upward
CCR-U5-6D
Deep
21.5
26.5
24.0
710.07
CCR-U5-8S
Shallow
11.0
26.0
18.5
753.38
0.01
Upward
CCR-U5-8D
Deep
58.5
62.5
60.5
753.63
GWA-2S
Shallow
6.0
21.0
13.5
675.01
0.09
Downward
GWA-2BRU
Deep
32.4
37.4
34.9
672.98
GWA-2BRU
Deep
32.4
37.4
34.9
672.98
0.00
Horizontal
GWA-2BRA
Bedrock
58.0
68.0
63.0
672.84
GWA-4S
Shallow
5.0
20.0
12.5
709.03
0.07
Downward
GWA-4D
Deep
32.0
37.0
34.5
707.58
GWA-31D
Deep
10.4
15.4
12.9
738.43
0.25
Downward
GWA-31BRA
Bedrock
116.5
126.5
121.5
711.51
GWA-36S
Shallow
7.0
22.0
14.5
703.13
0.02
Upward
GWA-36D
Deep
83.0
88.0
85.5
704.20
GWA-38S
Shallow
35.0
50.0
42.5
706.57
0.03
Upward
GWA-38D
Deep
1 53.0
58.0
1 55.5
1 707.02
Beyond the Compliance Boundary of the Unit 5 Active Ash Basin
Upgradient of the Unit 5 Active Ash Basin
GWA-45S
Shallow
45.5
55.5
50.5
763.53
0.03
Upward
GWA-45D
Deep
84.0
89.0
86.5
754.47
MW-42S
Shallow
5.0
20.0
12.5
778.74
0.02
Downward
MW-42DA
Deep
49.3
54.3
51.8
777.76
Downgradient of the Unit 5 Active Ash Basin
GWA-34S
Shallow
14.3
29.3
21.8
711.38
0.12
Upward
GWA-34BR
Bedrock
51.0
61.0
56.0
715.38
GWA-35S
Shallow
20.0
35.0
27.5
674.73
0.02
Downward
GWA-35D
Deep
62.0
67.0
64.5
674.05
GWA-37S
Shallow
40.0
55.0
47.5
670.54
0.08
Upward
GWA-37D
Deep
95.0
100.0
97.5
674.48
GWA-56S
Shallow
25.0
40.0
32.5
681.53
0.07
Downward
GWA-56D
Deep
67.0
72.0
69.5
678.92
MW-34S
Shallow
14.4
29.4
21.9
726.79
0.15
Downward
MW-34BRU
Deep
43.7
48.7
46.2
723.26
MW-36S
Shallow
4.0
19.0
11.5
671.14
0.02
Downward
MW-36BRU
Deep
77.6
82.6
80.1
669.82
MW-38S
Shallow
37.7
52.7
45.2
669.17
0.05
Upward
MW-38D
Deep
69.0
74.0
71.5
670.50
MW-38D
Deep
69.0
74.0
71.5
670.50
0.05
Downward
MW-38BR
Bedrock
1 97.5
102.5
1 100.0
1 669.02
MW-40S
Shallow
5.0
20.0
12.5
704.09
0.07
Upward
MW-40BRU
Deep
30.4
35.4
32.9
705.47
Notes:
' - Values measured during well installation
BGS - Below ground surface
dh - difference in water level elevation
dl - difference in mid -point of screen length
NAVD 88 - North American Vertical Datum 1988
Q2 2019 water level data collected April 22, 2019
Prepared by: TCP Checked by: GTC
Page 2 of 2

APPENDIX B, TABLE 6
SAMPLING RESULTS - OUTFALL 002
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Sample Date
Samply Type Code
Fraction
Chemical Name
Report Result Text
Report Result Value
Unit
Detect Flag
6/5/2019
N
N
Fecal Coliform
< 2
2
cfu/100ml
N
6/5/2019
N
N
Biological Oxygen Demand (5 Day)
< 2
2
mg/1
N
6/4/2019
N
T
Mercury (elemental)
2.10
2.1
ng/1
Y
6/4/2019
N
T
Mercury elemental
1.50
1.5
n /1
Y
6/4/2019
N
N
Oil and Grease
< 5
5
mg/1
N
6/4/2019
N
N
Turbidity
2.83
2.83
NTU
Y
6/4/2019
N
T
Lead PB
< 1
1
u /1
N
6/4/2019
N
T
Thallium TL
< 1
1
u /1
N
6/4/2019
N
T
Arsenic AS
39.4
39.4
u /1
Y
6/4/2019
N
T
Cadmium, CD
< 1
1
ug/1
N
6/4/2019
N
T
Chromium CR
< 1
1
u /1
N
6/4/2019
N
T
Zinc ZN
< 5
5
u /1
N
6/4/2019
N
T
Selenium, SE
3.20
3.2
ug/1
Y
6/4/2019
N
N
Bromide
0.92
0.92
mg/1
Y
6/4/2019
N
N
Total Dissolved Solids
470
470
m /1
Y
6/4/2019
N
N
Total Suspended Solids
< 5
5
m /1
N
6/11/2019
N
T
Mercury elemental
0.556
0.556
n 1
Y
6/11/2019
N
T
Arsenic AS
41.1
41.1
u /1
Y
6/11/2019
N
T
Selenium SE
3.50
3.5
u /1
Y
6/11/2019
N
T
Mercury elemental
0.576
0.576
n /1
Y
6/18/2019
N
T
Mercury elemental
0.644
0.644
n /1
Y
6/18/2019
N
T
Mercury elemental
0.678
0.678
n /1
Y
6/18/2019
N
T
Arsenic AS
42.4
42.4
u /1
Y
6/18/2019
N
T
Selenium, SE
3.35
3.35
ug/1
Y
6/25/2019
N
T
Mercury elemental
0.936
0.936
n /1
Y
6/25/2019
N
T
Mercury elemental
0.814
0.814
n /1
Y
6/25/2019
N
T
Arsenic, AS
43.9
43.9
ug/1
Y
6/25/2019
N
T
Selenium SE
3.76
3.76
u /1
Y
6/4/2019
N
T
Chlorine Total Residual
< 10
10
u /1
N
6/18/2019
N
T
Chlorine Total Residual
< 10
10
u /1
N
6/4/2019
N
N
Field pH
7.02
7.02
SI
Y
6/4/2019
N
N
Toxicity,Final Chronic Toxic Units Cerioda hnia
Pass
units
Y
6/4/2019
N
N
Water Temperature
81.4
81.4
F
Y
6/11/2019
N
N
Field pH
7.47
7.47
SI
Y
6/11/2019
N
N
Water Temperature
78.6
78.6
F
Y
6/18/2019
N
N
Field pH
8.36
8.36
SI
Y
6/18/2019
N
N
Water Temperature
81.2
81.2
F
Y
6/25/2019
N
N
Field pH
8.34
8.34
SI
Y
6/25/2019
N
N
Water Temperature
81.8
81.8
F
Y
6/4/2019
N
N
Flow
2.1
2.1
an d
Y
6/11/2019
N
N
Flow
2.3
2.3
mgd
Y
6/18/2019
N
N
Flow
2.3
2.3
mgd
Y
6/25/2019
N
N
Flow
2.3
2.3
an d
Y
Prepared by: TJG Checked by: SAS
Page 1 of 1

APPENDIX B, TABLE 7
CAP UPDATE - EXCLUDED DATA SUMMARY
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Monitoring Well
2018
2019
ID
First Quarter
Second Quarter
Third Quarter
Fourth Quarter
First Quarter
Second Quarter
Wells Not Sampled
Date of Sampling Attempt (Reason not Sampled)
AS-4S
7/30/2018 Insufficient Volume
10/22/2018 Insufficient Volume
CLMW-5D
7/30/2018 Dr
10/22/2018 Dr
GWA-6S
7/30/2018 Insufficient Volume
10/22/2018 Insufficient Volume
GWA-14S
7/30/2018 Insufficient Volume
10/23/2018 Insufficient Volume
GWA-21BR
1/28/2019 Insufficient Volume
GWA-28S
7/30/2018 Insufficient Volume
GWA-38D
7/30/2018 Insufficient Volume
10/30/2018 Insufficient Volume
1/31/2019 Insufficient Volume
GWA-38S
7/30/2018 Dr
10/30/2018 Dr
1/31/2019 Dr
5/1/2019 Insufficient Volume
GWA-39S
1/30/2019 Insufficient Volume
4/25/2019 Insufficient Volume
GWA-40S
1/31/2019 Insufficient Volume
4/25/2019 Insufficient Volume
GWA-45S
7/30/2018 Insufficient Volume
10/22/2018 Insufficient Volume
GWA-46D
7/30/2018 Insufficient Volume
10/25/2018 Insufficient Volume
1/30/2019 Insufficient Volume
MW-34S
7/30/2018 (Insufficient Volume
U5-2S-SLA
7/31/2018(Heavy Sediment/Mud
U5-6S
7/30/2018 Insufficient Volume
10/31/2018 Insufficient Volume
1/30/2019 Insufficient Volume
Samples Excluded from Mean Calculations due to High Turbidity (>10 NTU)
Date of Sample (Turbidity in NTU)
A13-2D
1/29/2019 (15.5)
A13-313R
1/24/2019 29.6
4/29/2019 22.1
A13-313RA
11/1/2018 65.2
A13-713RU
4/30/2019 205.2 , 7/1/2019 429.0
CCR-IB-3S
1/28/2019 40.6
3/1/2019 20.7
GWA-11BRL
2/21/2019 144.0
4/30/2019 53.0
GWA-14BR
1/31/2019 24.9
GWA-54BRO
4/26/2019 12.6
GWA-62BR
4/30/2019 86.2
GWA-62BR
7/1/2019 22.5
GWA-65BR
2/21/2019 35.7
3/1/2019 202.1
GWA-65BRL
5/1/2019 81.4
MW-20D
4/25/18 48.3
MW-32BR
1/22/2019 56.0
U5-4D
5/1/18 16.0
Samples Excluded from Mean Calculations due to High pH (>10 S.U.)
Date of Sample (pH in S.U.)
AB-313R
10/31/2018 12.4
A13-313RA
1/24/2019 12.5
4/29/2019 12.4
A13-313RUA
1/29/2018 12.1
4/26/2018 11.4)
7/31/2018 11.2
10/23/2018 11.4
1/23/2019 11.2
4/29/2019 (10.9
AB-4UA15
8/7/2018 10.4
11/1/2018 (10.6
AS-713RA
2/2/2018 12.2
4/30/2018 11.8
8/3/2018 12.9
10/30/2018 11.9
1/25/2019 12.2
AS-7BRL
1/25/2019 12.1
4/25/2019 11.9
AS-7S
8/6/2018 10.3
13G-113RA
4/27/2018 12.1
7/31/2018 11.7
10/25/2018 11.9
1/21/2019 10.7
4/26/2019 11.2
CCR-IB-3D
10/24/2018 10.4
1/28/2019 11.1 3/1/2019 10.8
5/2/2019 10.4
GWA-213R
8/2/2018 11.3
GWA-20BR
1/30/2018 10.4
4/30/2018 10.9
GWA-21S
2/5/2018 10.8
4/26/2018 10.9 , 5/8/2018 10.6
4/30/2019 10.4
GWA-65BR
2/21/2019 11.7
5/1/2019 11.1
GWA-65BRL
2/20/2019 12.8
5/1/2019 11.1
GWA-67BR
2/20/2019 12.6
5/1/2019 11.0
MW-11BRL
5/1/2019 10.8
U5-413RA
1/31/2018 11.8
5/1/2018 10.9
8/1/2018 10.9
11/1/2018 11.3
U5-8BR
1 30 2018 10.4
4 27 2018 10.3
11/1/2018 10.4
1 23 2019 10.3
Notes
Samples excluded from mean calculations when turbidity >10 NTU and/or pH > 10 S.U. for all constituents except boron
NTU - Nephelometric Turbidity Unit
S.U. - Standard Unit
Prepared by: TJG Checked by: SAS
Page 1 of 1

APPENDIX B, TABLE 8
GEOCHEMICAL TRANSECT MONITORING WELLS AND WELLS PERPENDICULAR TO TRANSECTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Active Ash Basin - West Transect
Wells along Transect
Wells Perpendicular to "Centerline" of Plume
GWA-27DA
AB-3I
GWA-27BR
AB-3S
CCR-12S
AB-3SLA
CCR-12D
AB-3BRUA
AB-2S
AB-3BR
AB-2D
CCR-11S
AB-2BRO
CCR-11D
GWA-20S
MW-8S
GWA-20D
MW-8D
GWA-20BR
CCR-9D
CCR-8D
Active Ash Basin - East Transect
Wells along Transect
Wells Perpendicular to "Centerline" of Plume
AB-1S
CCR-3BR
AB -ID
GWA-28S
AB-1BRO
GWA-28BRU
GWA-21S
GWA-28BRU
GWA-21BRU
MW-4D
GWA-21BR
MW-20D
MW-20DR
GWA-22S
GWA-22BRU
MW-11S
MW-11DA
MW-11BRO
Ash Storage Area Transect
Wells along Transect
Wells Perpendicular to "Centerline" of Plume
AB-3I
CLMW-1
AB-3S
CLMW-3S
AB-3SLA
CLMW-3D
AB-3BRUA
CLMW-2
AB-3BR
MW-25DR
CCR-7S
AS-5S
CCR-7D
AS-5BRU
AS-1SB
AS-5BR
AS -ID
CCR-6S
AS-7S
CCR-6D
AS-7D
GWA-29D
AS-7BRA
GWA-29BRA
AS-2S
AS-2D
AS-2BR
Unit 5 Inactive Ash Basin Transect
Wells along Transect
Wells Perpendicular to "Centerline" of Plume
U5-7S
CCR-U5-2D
U5-7SL
U5-4S
U5-7D
U5-4D
CCR-U5-4S
U5-4BRA
CCR-U5-4D
CCR-U5-3S
GWA-2S
CCR-U5-3D
GWA-2BRU
U5-5D
GWA-2BR
U5-5BR
U5-2S-SLA
CCR-U5-5D
U5-2D
GWA-3D
U5-2BR
Page 1 of 1

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
pH
Temperature
Specific
Conductance
Dissolved
Oxygen
Oxidation
Reduction
Potential
Eh
Turbidity
Flow
Alkalinity
Bicarbonate
Alkalinity
Methane
Sulfide
Total
Organic
Carbon
Total
Suspended
Solids
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Reporting Units
S.U.
Deg C
umhos/cm
mg/L
mV
mV
NTUs
GPM
mg/L
mg/L
ug/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
mg/L
mg/L
15A NCAC 02B (Class C, WS-IV)
6.0-9.0
32
NE
4
NE
NE
25
NE
NE
NE
NE
NE
NE
NE
NE
NE
250
NE
250
500
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
5.2-64.2
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
C ION
Active Ash Basin
WS-IV
6.5
22
64
9.33
981
1186
14.3
NM
NA
NA
NA
NA
NA
8
<50
5.18
4.2
NA
4.4
28
C ION
Active Ash Basin
WS-IV
7.0
26
78
8.10
194
399
14.3
NM
NA
NA
NA
NA
NA
NA
81
6.92
6.4
NA
5.2
58
C ION
Active Ash Basin
WS-Iv
7.0
20
48
7.97
147
352
35.6
NM
NA
NA
NA
NA
NA
NA
<50
3.7
3.1
NA
3.1
25
C ION
Active Ash Basin
WS-IV
6.8
10
56
5.05
332
537
15.1
NM
NA
NA
NA
NA
NA
9.8
<50
4.33
4.4
NA
3.9
74
C ION
Active Ash Basin
WS-IV
7.1
24
53
8.22
252
457
12.8
NM
NA
NA
NA
NA
NA
NA
109
4.74
5.2
NA
2.6
35
SC 2 DN
Active Ash Basin
WS-IV
7.3
20
49
8.97
206
411
13.5
NM
NA
NA
NA
NA
NA
<5
<50
3.09
4.3
NA
3.5
<25
SC 2 DN
Active Ash Basin
WS-IV
6.9
24
63
8.07
174
379
13.1
NM
NA
NA
NA
NA
NA
NA
<50
4.46
5.6
NA
4.6
47
SC 2 DN
Active Ash Basin
WS-IV
7.4
19
55
8.71
97
302
19.8
NM
NA
NA
NA
NA
NA
NA
<50
3.69
4.4
NA
4.2
29
SC 2 DN
Active Ash Basin
WS-Iv
7.8
9
49
6.46
200
405
11.9
NM
NA
NA
NA
NA
NA
<5
<50
2.8
3.3
NA
3.9
71
SC 2 DN
Active Ash Basin
WS-IV
7.0
21
49
8.80
226
431
15.2
NM
NA
NA
NA
NA
NA
NA
<50
2.87
4.6
NA
2.7
45
SC 2 UP
Active Ash Basin
WS-IV
6.9
19
69
7.71
244
449
18.5
NM
NA
NA
NA
NA
NA
6
<50
2.54
3.6
NA
1.9
54
SC 2 UP
Active Ash Basin
WS-IV
1 6.9
28
51
4.52
185
390
12.6
NM
NA
NA
NA
NA
NA
NA
<50
2.78
3.8
NA
1.1
49
SC 2 UP
Active Ash Basin
WS-IV
6.9
21
60
5.75
122
327
17.6
NM
NA
NA
NA
NA
NA
NA
<50
2.73
3.8
NA
2.1
30
SC 2 UP
Active Ash Basin
WS-IV
7.9
7
48
6.12
256
461
13.6
NM
NA
NA
NA
NA
NA
<5
<50
2.29
2.9
NA
2.8
66
SC 2 UP
Active Ash Basin
WS-IV
7.3
30
58
5.40
252
457
21.3
NM
NA
NA
NA
NA
NA
NA
<50
2.33
3.7
NA
1.4
32
SW-02
Active Ash Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
10
10
12.4 j+
<0.1
2.2
<2.5
<50
2.43
4.2
19
1 1.1
29
SW-02
Active Ash Basin
WS-IV
8.7
20
51
7.34
-96
109
6.3
NM
10.8
10.8
2.3 j+
<0.1
1.5
<6.2
<50
2.86
4
21
1.5
33
SW-02
Active Ash Basin
WS-IV
6.9
13
384
7.90
142
347
3.9
NM
8.7
8.7
<10
<0.1
0.94 j
4.2
<50
2.43
3.5
18
1.2
42
SW-02
Active Ash Basin
WS-IV
7.1
25
272
4.60
152
357
12.8
NM
11.5 j+
11.5 j+
344
<0.1
1.7
6.5
<50
2.5
3.9
19.8
1.5
<25
SW-02
Active Ash Basin
WS-IV
1 7.5
29
330
4.65
58
263
16.0
NM
64.2
64.2
<10
<0.1
7.7
6 j+
1<50
44.3
7
59.3
75
191
SW-02
Active Ash Basin
WS-IV
6.5
7
50
10.30
198
403
4.9
NM
12.6
12.6
15.7
<0.1
0.84 j
<2.5
<50
3.06
4
19.4
2.9
<25
SW-02 (1)
Active Ash Basin
WS-IV
6.8
7
48
9.66
133
338
6.6
NM
9.4
9.4
28.7 N2
NA
1.3
4.7
<25
2.88
4.4
19.6
2.9
63
SW-02 (2)
Active Ash Basin
WS-IV
6.8
7
48
9.66
133
338
6.6
NM
9.5
9.5
32 N2
NA
1.7
<2.6
<25
2.89
4.4
19.7
2.8
46 D6
SW-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
7.4
8
50
15.09 S
-252
-47
6.4
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
7.4
8
50
14.98 S
-251
-46
6.4
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (3)
Active Ash Basin
WS-IV
6.6
10
47
8.15
-228
-23
9.4
NM
9.2
9.2
24.8 N2
<0.1
1.1
4.2
<25
2.66
4.2
20
2.5
<25
SW-02 (4)
Active Ash Basin
WS-IV
6.6
10
48
8.32
-239
-34
11.5
NM
8.8
8.8
17.3 N2
<0.1
1.1
<2.6
<25
2.68
4.1
20.7
2.5
<25
SW-02
Active Ash Basin
WS-IV
6.7
11
44
7.80
105
310
6.9
NM
9.2
9.2
18.4
<0.1
1.1
<3.3
<50
2.59
3.8
17.8
1.6
34
SW-02
Active Ash Basin
WS-IV
6.4
20
55
5.20
168
373
10.0
NM
10.3
10.3
15.1
<0.1
1.5
6.1
<50
2.6
3.6
19.1
1.9
31
SW-02
Active Ash Basin
WS-IV
6.8
24
69
4.30
138
343
7.7
NM
12
12
NA
<0.1
2.4
2.8
<50
2.82
3.9
18
1.4
36
SW-02
Active Ash Basin
WS-IV
6.9
7
129
12.40
100
305
3.9
NM
10.9
10.9
NA
<0.1
1.3
<2.5
<50
2.52
3.7
16.6
1.4
46
SW-02
Active Ash Basin
WS-IV
6.8
8
48
9.00
46
251
2.5
NM
9.5
9.5
NA
<0.1
1.2
<2.5
<50
2.46
3.9
17
2.1
32
SW-02
Active Ash Basin
WS-IV
6.7
18
47
6.60
64
269
8.2
NM
8.3
8.3
NA
<0.1
1.9
<5
<50
2.66
3.3
16.3
1.6
37
SW-03
Active Ash Basin
WS-IV
7.1
24
52
7.90
118
323
5.7
NM
<10
<10
<100
<0.1
1.9
3.1
<50
2.77
4
22
2.2
43
SW-03
Active Ash Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
11
11
5.8 j+
<0.1
1.9
<3.8
60
5.12
6
34
7.4
60
SW-03
Active Ash Basin
WS-IV
6.9
18
80
8.09
121
326
3.2
NM
9.1
9.1
<10
<0.1
0.88 j
2.8
<50
3.45
3.7
21.7
3.2
32
SW-03
Active Ash Basin
WS-IV
8.2
27
51
5.10
120
325
11.5
NM
11.5
11.5
<10
<0.1
1.7
3
54.1
5.41
5.5
36.3
7
<25
SW-03
Active Ash Basin
WS-IV
1 7.2
25
118
6.80
81
286
10.9
NM
14.6
14.6
245
<0.1
3
<2.6
79.8
8.94
6.5
51.4
15.5
53
SW-03
Active Ash Basin
WS-IV
8.3
9
59
10.10
-3
202
4.2
NM
11.5
11.5
<10
<0.1
1.2
<2.5
28.6 j
3.59
5
24.6
4.1
36
SW-03
Active Ash Basin
WS-IV
7.3
10
80
10.80
76
281
7.7
NM
9.5
9.5
<10
<0.1
1.1
<2.5
<50
3.46
4.8
23.2
3.9
38
SW-03
Active Ash Basin
WS-IV
6.5
21
60
6.10
198
403
8.3
NM
<5
<5
<10
<0.1
1.5
<2.5
30.2 j
3.96
4.7
29.2
5.2
47
SW-03
Active Ash Basin
WS-IV
7.0
26
64
4.60
132
337
6.5
NM
13
13
NA
<0.1
2.1
<2.5
34 j
4.36
5.1
28.8
5.4
55
SW-03
Active Ash Basin
WS-IV
7.8
8
73
9.50
86
291
3.3
NM
11.7
11.7
NA
<0.1
1.4
<5
42.1 j
4.93
5.2
31.6
7.8
49
SW-03
Active Ash Basin
WS-IV
7.0
7
56
9.90
50
255
2.9
NM
9.9
9.9
NA
<0.1
1.4
<2.5
<50
3.92
4.8
24.2
5
42
SW-03
Active Ash Basin
WS-IV
7.1
17
69
8.20
98
303
9.4
NM
10
10
NA
<0.1
1.8
3.1
1 <50
3.42
3.9
21.4
4
49
SW-04
Active Ash Basin
WS-IV
7.1
22
51
7.90
116
321
6.0
NM
<10
<10
<100
<0.1
1.9
2.6
<50
2.89
4.1
22
2.4
48
SW-04
Active Ash Basin
WS-IV
7.6
21
73
5.67
-62
144
13.5
NM
13.1
13.1
4.9 j+
<0.1
2.7
2.8
40 j
5.11
4.8
29
6.9
53
SW-04
Active Ash Basin
WS-IV
7.8
18
57
8.70
244
449
6.3
NM
8.5
8.5
<10
<0.1
0.83 j
<6.5
<50
3.13
3.6
19.4
2.7
30
SW-04
Active Ash Basin
WS-IV
8.1
27
75
5.60
98
303
10.3
NM
13.5 j+
13.5 j+
<10
<0.1
1.5
5.8
<50
3.65
4.3
27.3
3.9
44
SW-04
Active Ash Basin
WS-IV
1 7.5
23
110
10.19
158
363
15.9
NM
18
18
16.7
<0.1
1.3
13.2 j+
<50
4.26
3.4
29.2
2.5
46
SW-04
Active Ash Basin
WS-IV
5.6
9
52
10.70
344
549
5.0
NM
14.9
14.9
<10
<0.1
1.1
15.7
27.1 j
3.63
3.5
24.7
2.9
<25
SW-04
Active Ash Basin
WS-IV
5.9
9
80
9.30
122
327
6.6
NM
10.7
10.7
<10
<0.1
0.76 j
<2.5
<50
3.5
4.1
22.1
3
60
SW-04
Active Ash Basin
WS-IV
6.0
23
63
5.10
230
435
6.9
NM
12.7
12.7
<10
<0.1
1.2
5.4
<50
3.02
2.6
25.3
2.9 j+
37
SW-04
Active Ash Basin
WS-IV
7.4
27
59
5.30
46
251
9.9
NM
10.9
10.9
NA
<0.1
2.1
<2.6
25.5 j
3.61
4.9
23.8
3.5
46
Page 1 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
(Nitrate
as N)
Nitrate +
Nitrite
Potassium
Selenium
Silver
Sodium
Thallium
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg-N/L
mg/L
ug/L
ug/L
mg/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
10
1000
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
0.012
NE
25
NE
30
NE
5
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
69.2-1760
<0.1-<5 NE
NE
NE
NE
NE
NE
NE
NE
225-3630
NE
NE
NE
17.8-160
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
C ION
Active Ash Basin
WS-IV
NA
NA
<1
18
NA
<0.1
NA
<1
NA
<1
NA
0.231
NA
1.41
NA
0.000997
NA
<1
NA
0.18
NA
<1
NA
NA
<0.2
C ION
Active Ash Basin
WS-IV
NA
NA
1.15
18
NA
<0.1
NA
<1
NA
<1
NA
0.31
NA
1.77
NA
0.00115
NA
<1
NA
0.149
NA
<1
NA
NA
<0.2
C ION
Active Ash Basin
WS-IV
NA
NA
<1
24
NA
<0.1
NA
1.62
NA
1.34
NA
1.17
NA
1.4
NA
0.0037
NA
<1
NA
0.24
NA
<1
NA
NA
<0.2
C ION
Active Ash Basin
WS-IV
NA
NA
<1
17
NA
<0.1
NA
<1
NA
<1
NA
0.305
NA
1.2
NA
0.00153
NA
<1
NA
0.28
NA
<1
NA
NA
<0.2
C ION
Active Ash Basin
WS-IV
NA
NA
<1
18
NA
<0.1
NA
<1
NA
1.5
NA
0.368
NA
1.63
NA
0.00163
NA
<1
NA
0.31
NA
<1
NA
NA
<0.2 B3
SC 2 ON
Active Ash Basin
WS-IV
NA
NA
<1
23
NA
<0.1
NA
<1
NA
<1
NA
0.201
NA
1.49
NA
0.00129
NA
<1
NA
0.41
NA
<1
NA
NA
<0.2
SC 2 ON
Active Ash Basin
WS-IV
NA
NA
<1
24
NA
<0.1
NA
<1
NA
<1
NA
0.203
NA
1.79
NA
0.00137
NA
<1
NA
0.377
NA
<1
NA
NA
<0.2
SC 2 ON
Active Ash Basin
WS-IV
NA
NA
<1
28
NA
<0.1
NA
<1
NA
<1
NA
0.353
NA
1.67
NA
0.00173
NA
<1
NA
0.44
NA
<1
NA
NA
<0.2
SC 2 ON
Active Ash Basin
WS-IV
NA
NA
<1
27
NA
<0.1
NA
<1
NA
<1
NA
0.242
NA
1.4
NA
0.00155
NA
<1
NA
0.53
NA
<1
NA
NA
<0.2
SC 2 ON
Active Ash Basin
WS-IV
NA
NA
<1
26
NA
<0.1
NA
<1
NA
<1
NA
0.334
NA
1.41
NA
0.00204
NA
<1
NA
0.66
NA
<1
NA
NA
<0.2 B3
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
<1
25
NA
<0.1
NA
<1
NA
<1
NA
0.317
NA
1.34
NA
0.00122
NA
<1
NA
0.44
NA
<1
NA
NA
<0.2
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
<1
21
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
1.36
NA
0.000848
NA
<1
NA
1
NA
<1
NA
NA
<0.2
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
<1
27
NA
<0.1
NA
<1
NA
<1
NA
0.364
NA
1.44
NA
0.00166
NA
<1
NA
0.44
NA
<1
NA
NA
<0.2
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
<1
26
NA
<0.1
NA
<1
NA
<1
NA
0.273
NA
1.26
NA
0.00161
NA
<1
NA
0.54
NA
<1
NA
NA
<0.2
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
<1
25
NA
<0.1
NA
<1
NA
<1
NA
0.356
NA
1.28
NA
0.00188
NA
<1
NA
0.62
NA
<1
NA
NA
<0.2 B3
SW-02
Active Ash Basin
WS-IV
140
<0.5
0.3 j
20
<0.2
<0.08
NA
0.51
0.19 j
0.46 j
1500
0.18
NA
1.25
31
<0.2
<0.5
0.36 j
NA
0.45
<5
<0.5
NA
2.6 j
<0.1
SW-02
Active Ash Basin
WS-IV
110
<0.5
0.33 j
20
<0.2
<0.08
NA
0.54 j+
0.28 j
0.38 j+
1400
0.2
NA
1.41
60
<0.2
<0.5
0.35 j
NA
0.37
<5
<0.5
NA
2.7 j
0.019 j
SW-02
Active Ash Basin
WS-IV
84.2 j
<0.5
0.19
25.2
0.05 j
1 <0.08
<0.03
0.45 j+
0.31
0.48 j
818
0.18
NA
1.25
37.5
0.000902
<0.5
0.47 j
NA
0.5
<5
<0.5
NA
2.69 j
<0.1
SW-02
Active Ash Basin
WS-IV
231
<0.5
0.38
23.3
0.021 j
<0.08
0.021 j
0.61
0.44
0.49 j
1860
0.39
NA
1.21
73.4
0.00206 j
<0.5
0.49 j
NA
0.44
<5
<0.5
NA
2.57 j
0.039 j
SW-02
Active Ash Basin
WS-IV
311
0.13 j
2.2
33.8
<0.1
<0.08
<0.6
0.74 j+
0.64
1.8
895
0.21
NA
5.67
81.3
0.00253 j+
1.7
3
NA
<0.02
11.2
0.5
NA
4.02 j
0.032 j
SW-02
Active Ash Basin
WS-IV
<100
<0.5
0.26
18.2
<0.1
<0.08
<0.25 D3
0.34 j
0.23
0.14 j
1310
0.14
NA
1.41
34.6
0.000819
<0.5
<0.5
NA
0.35
<5
<0.5
NA
2.72 j
<0.1
SW-02 (1)
Active Ash Basin
WS-IV
181
<0.1
0.23
23.7
0.011 j
<0.05
0.31
0.55
0.47
<0.11
1130
0.18
NA
1.47
82
0.000532 B
<0.11
0.49 j
NA
0.43
<2.5
<0.31
<0.07
2.88 j
<0.015
SW-02 (2)
Active Ash Basin
WS-IV
160
<0.1
0.21
23.9
<0.01
<0.05
0.3
0.46 j
0.51
<0.11
1140
0.18
NA
1.47
85
0.000927 B
<0.11
0.5
NA
0.43
<2.5
<0.31
<0.07
2.84 j
<0.015
SW-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (3)
Active Ash Basin
WS-IV
149
<0.1
0.27
22.3
0.015 j
<0.05
0.057 j,D3
0.56
0.4
0.41 j
1110
0.2
NA
1.38
67
0.00103
<0.11
<0.44
NA
0.43
<2.5
<0.31
<0.07
3.12 j
<0.015
SW-02 (4)
Active Ash Basin
WS-IV
175
<0.1
0.26
23.2
0.011 j
<0.05
<0.041 D3,M1
0.7
0.38
0.36 j
1200
0.22
NA
1.38
69.3
0.000908
<0.11
<0.44
NA
0.43
<2.5
<0.31
<0.07
3.23 j
<0.015
SW-02
Active Ash Basin
WS-IV
163
<0.5
0.26
20.7
0.02 j
<0.08
0.06 j,D3,M1
0.6 j+
0.31
0.41 j
1300
0.26
NA
1.26
47.6
0.00135
<0.5
0.45 j
NA
0.36
<5
<0.5
NA
2.61 j
<0.1
SW-02
Active Ash Basin
WS-IV
243
<0.5
0.27
23.6
0.026 j+
<0.08
0.089 j,D3
0.32 j
0.35
0.63 j+
1400
0.32
NA
1.22
46.6
0.00196 j+
<0.5
<0.5
NA
0.22
<5
<0.5
NA
2.63 j
0.023 j+
SW-02
Active Ash Basin
WS-IV
120
<0.5
0.39
20.9
0.022 j
<0.08
0.31
0.64
0.25
0.8
1130
0.33
NA
1.32
37.3
0.00117
<0.5
<0.5
NA
0.36
<5
<0.5
NA
2.54 j
0.033 j
SW-02
Active Ash Basin
WS-IV
73.4 j
<0.5
0.31 B
19.7
0.037 j
0.035 j
<0.12 D3
0.29 j
0.21
0.35 j
853
0.13
NA
1.31
26.7
0.000736
<0.5
0.23 j
NA
0.36
<5
<0.5
NA
2.66 j
0.038 j
SW-02
Active Ash Basin
WS-IV
177
<0.5
0.14
21.2
<0.1
<0.08
<0.025
<0.5
0.29
<0.5
859
0.15
0.57
1.23
39.8
0.00108
<0.5
<0.5
NA
0.5
<5
<0.5
NA
<5
<0.1
SW-02
Active Ash Basin
WS-IV
225
<0.5
0.26
21.5
<0.1
<0.08
<0.025 P4,R0
0.38 j
0.35
0.77
1100
0.26
0.61
1.33
40.5
0.00132
<0.5
0.44 j,B
NA
0.45
<5
<0.5
NA
2.55 j
<0.1
SW-03
Active Ash Basin
WS-IV
129
<0.5
0.25 j
22
<0.2
<0.08
NA
0.6
0.2 j
0.74 j+
1250
0.24
NA
1.28
30
<0.0005
<0.5
0.47 j
NA
0.46
<5
<0.5
NA
2.57 j
0.02 j+
SW-03
Active Ash Basin
WS-IV
100
<0.5
<0.5
23
<0.2
<0.08
NA
0.4 j
0.42 j
0.53 j
1200
0.22
NA
2.01
87
<0.2
<0.5
0.4 j
NA
0.3
<5
<0.5
NA
3.16 j
0.024 j
SW-03
Active Ash Basin
WS-IV
85.6 j
<0.5
0.2
22.6
<0.1
<0.08
0.019 j
0.35 j+
0.54
0.32 j
721
0.13
NA
1.46
50.7
0.00106
<0.5
<0.5
NA
0.45
<5
<0.5
NA
2.72 j
<0.1
SW-03
Active Ash Basin
WS-IV
186
<0.5
0.42
24.5
0.023 j
<0.08
0.023 j
0.53
0.4
0.61
1620
0.28
NA
1.87
89.3
0.00162
<0.5
0.45 j
NA
0.45
<5
0.33 j
NA
3.08 j
0.03 j
SW-03
Active Ash Basin
WS-IV
150
<0.5
0.51
26.7
0.027 j+
<0.08
<0.6
0.64 j+
3.4
0.45 j
1600
0.49
NA
2.44
288
0.00173
<0.5
0.89
NA
0.31
3.37 j
0.4 j
NA
3.33 j
0.038 j
SW-03
Active Ash Basin
WS-IV
<100
<0.5
0.19
18.8
0.028 j
<0.08
<0.25 D3
1.2
0.18
0.29 j
1230
0.14
NA
1.56
41.8
0.00113
<0.5
0.69
NA
0.33
<5
<0.5
NA
3.06 j
0.047 j
SW-03
Active Ash Basin
WS-IV
126
<0.5
0.22
21.3
0.021 j+
<0.08
0.06 j,D3
2.4 j+
0.29
0.77 j+
1310
0.21 j+
NA
1.51
53.6
0.00126
<0.5
2.4 j+
NA
0.39
<5
<0.5
NA
2.89 j
<0.1
SW-03
Active Ash Basin
WS-IV
118
<0.5
0.23
24.7
0.018 j+
<0.08
0.083 j,D3
0.16 j
0.79
0.42 j+
1130
0.23
NA
1.51
72.2
0.00226 j+
<0.5
<0.5
NA
0.2
<5
<0.5
NA
2.84 j
0.022 j+
SW-03
Active Ash Basin
WS-IV
131
<0.5
0.36
23.7
0.019 j
<0.08
0.56
0.55
0.87
0.62
1080
0.32
NA
1.64
83.2
0.00168
<0.5
<0.5
NA
0.35
<5
<0.5
NA
2.82 j
0.025 j
SW-03
Active Ash Basin
WS-IV
77.4 j
<0.5
0.34 B
21.5
<0.1
<0.08
<0.12 D3
1.6
1.7
0.55
806
0.12
NA
1.74
103
0.000754
<0.5
0.37 j
NA
0.34
<5
0.21 j
NA
2.98 j
<0.1
SW-03
Active Ash Basin
WS-IV
122
<0.5
0.18
20.4
<0.1
<0.08
<0.025
<0.5
1.1
<0.5
683
0.11
0.62
1.49
69.6
0.0012
<0.5
<0.5
NA
0.47
<5
<0.5
NA
<5
<0.1
SW-03
Active Ash Basin
WS-IV
219
<0.5
0.27
23.6
0.044 j
<0.08
0.12
0.44 j
0.69
0.48 j
876
0.26
0.67
1.47
49.6
0.00157
<0.5
0.53
NA
0.42
<5
<0.5
NA
2.55 j
0.032 j
SW-04
Active Ash Basin
WS-IV
115
<0.5
0.24 j
23
<0.2
<0.08
NA
0.57
0.3 j
0.97 j+
1220
0.28
NA
1.33
31
<0.0005
<0.5
0.4 j
NA
0.5
<5
<0.5
NA
2.66 j
0.035 j+
SW-04
Active Ash Basin
WS-IV
130
<0.5
0.28 j
25
<0.2
<0.08
NA
0.6
0.35 j
0.57 j
1300
0.21
NA
2.04
82
<0.2
<0.5
0.61
NA
0.28
2.75 j
<0.5
NA
2.99 j
0.019 j
SW-04
Active Ash Basin
WS-IV
108
<0.5
0.17 j
21.9
0.015 j
<0.08
0.028 j
0.49 j+
0.26
0.28 j
734
0.13
NA
1.43
36.9
0.00105
<0.5
<0.5
NA
0.45
<5
<0.5
NA
2.66 j
<0.1
SW-04
Active Ash Basin
WS-IV
186
<0.5
0.36
19.7
<0.1
<0.08
0.03 j
0.48 j
0.36
0.56
1090 j
0.31
NA
1.44
63
<0.0025
<0.5
<0.5
NA
0.3
<5
<0.5
NA
3.09 j
0.027 j
SW-04
Active Ash Basin
WS-IV
130
<0.5
0.32
17.1
0.01 j+
<0.08
<0.3
0.53 j+
0.42
0.71
577
0.47
NA
1.77
81.5
0.00171
<0.5
<0.5
NA
0.16
<5
<0.5
NA
4.46 j
0.019 j
SW-04
Active Ash Basin
WS-IV
<100
<0.5
0.22
16.8
0.026 j
<0.08
<0.25 D3
0.62
0.26
0.11 j
1060
0.13
NA
1.46
39.3
0.000953
<0.5
<0.5
NA
0.31
<5
<0.5
NA
3.08 j
0.021 j
SW-04
Active Ash Basin
WS-IV
108
<0.5
0.23
18.8
0.017 j
<0.08
0.075 j,D3
0.46 j
0.29
0.39 j
1010
0.19
NA
1.48
44.8
0.00127
<0.5
0.5 j
NA
0.36
<5
<0.5
NA
2.85 j
<0.1
SW-04
Active Ash Basin
WS-IV
280
<0.5
0.19
20.1
0.019 j
<0.08
0.079 j,D3
0.92 j+
0.29
0.46 j+
566
0.2
NA
1.19
48.6
0.00103 j+
<0.5
<0.5
NA
7.60E-02
<5
<0.5
NA
2.86 j
<0.1
SW-04
Active Ash Basin
WS-IV
110
<0.5
0.37
22.4
0.035 j
<0.08
0.11 j,D3
0.59
0.26
1 0.61
1 968
0.32
NA
1.54
43.7
0.00196
<0.5
0.47 j
NA
0.35
<5
<0.5
NA
2.79 j
0.061 j
Page 2 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Tin
Titanium
Vanadium
Zinc
Aluminum
(0.45u)
Antimony
(0.45u)
Arsenic
(0.45u)
Barium
(0.45u)
Beryllium
(0.45u)
Boron
(0.45u)
Cadmium
(0.45u)
Calcium
(0.45u)
Chromium
(0.45u)
Cobalt
(0.45u)
Copper
(0.45u)
Iron
(0.45u)
Lead
(0.45u)
Lithium
(0.45u)
Magnesium
(0.45u)
Manganese
(0.45u)
Mercury
(0.45u)
Molybdenum
(0.45u)
Nickel
(0.45u)
Phosphorus
(0.45u)
Reporting Units
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
ISO
NE
6.5
NE
0.15
NE
24
NE
2.7
NE
0.54
NE
NE
NE
NE
NE
16
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
C 1 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
C 1 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
C 1 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
C 1 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
C 1 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
1.05
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
NA
5.13
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
1.09
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.56 j
2.8 j
<100
<0.5
0.21 j
20
<0.2
<50
<0.08
NA
0.52
0.16 j
0.4 j
220
<0.1
NA
NA
27
<0.2
<0.5
0.42 j
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.64 j
<10
<100
<0.5
0.16 j
20
<0.2
<50
<0.08
NA
0.22 j
0.19 j
1.7
170
0.16
NA
NA
58
<0.2
<0.5
0.26 j
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.35
<10
<100
<0.5
0.18
22.3
<0.1
<50
<0.08
NA
0.34 j+
0.28
1.2
406
0.11
NA
NA
33.6
NA
<0.5
0.86
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.83
<10
<100
<0.5
0.23
23.1
0.02 j
<50
<0.08
NA
0.59 j+
0.31
1
448
0.091 j
NA
NA
69.5
NA
<0.5
0.62
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
1
2.7 j+
<100
0.13 j
1.9 j+
34.4
0.024 j
<50
<0.08
NA
0.34 j+
0.49
1.8 j+
<50
<0.1
NA
NA
73.9
NA
2.5
2.7
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.33
<10
<100
<0.5
0.17
17
<0.1
<50
<0.08
NA
0.25 j
0.2
1.2
325
<0.1
NA
NA
34.5
NA
<0.5
0.75
NA
SW-02 (1)
Active Ash Basin
WS-IV
NA
NA
0.56
<2.5
<50
<0.1
0.11
22.1
0.011 j
<25
<0.05
3.01
0.31 j
0.46
<0.11
136
<0.09
NA
1.53
82.3
7.87E-04
<0.11
<0.44
NA
SW-02 (2)
Active Ash Basin
WS-IV
NA
NA
0.46
<2.5
<50
<0.1
0.13
21.5
0.023 j
<25
<0.05
2.89
0.31 j
0.46
<0.11
174
<0.09
NA
1.48
77.9
0.00102
<0.11
<0.44
NA
SW-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (3)
Active Ash Basin
WS-IV
NA
NA
0.7 B
<2.5
<50
<0.1
0.14
21.3
<0.01
<25
<0.05
2.86
0.34 j
0.35
0.33 j
136
<0.09
NA
1.44
61.2
0.000886
<0.11
<0.44
NA
SW-02 (4)
Active Ash Basin
WS-IV
NA
NA
0.8 B
<2.5
<50
<0.1
0.16
20.9
<0.01
<25
<0.05
2.88
0.22 j
0.37
0.27 j
80.4
<0.09
NA
1.43
64.7
<0.00025
<0.11
<0.44
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.44
<10
115
<0.5
0.18
20.9
0.01 j
<50
<0.08
NA
1.9
0.32
0.72
462
0.11
NA
NA
47.8
NA
<0.5
2.7
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.38
<10
<100
<0.5
0.18
23
<0.1
<50
<0.08
NA
<0.5
0.24
8.2
183
0.87
NA
NA
44.2
NA
<0.5
<0.5
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.88
<10
<100
<0.5
0.22
18.4
<0.1
<50
<0.08
NA
0.26 j
0.16
0.7
112
<0.1
NA
NA
31.2
NA
<0.5
<0.5
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
0.43 B
3 j
51.2 j
<0.5
0.18
14.6
<0.1
<50
<0.08
NA
0.22 j
0.16
0.38 j
498
0.073 j
NA
NA
21.8
NA
<0.5
0.49 j
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<0.3
<10
<100
<0.5
<0.1
19.6
<0.1
<50
<0.08
NA
<0.5
<0.1
<0.5
372
<0.1
NA
NA
30.2
NA
<0.5
<0.5
<0.05
SW-02
Active Ash Basin
WS-IV
NA
NA
0.49
5.7 j
99.9 j
<0.5
0.22
20.5
<0.1
<50
<0.08
NA
0.3 j
0.31
0.84 B
222
0.052 j
NA
NA
34.6
NA
<0.5
0.92
<0.05
SW-03
Active Ash Basin
WS-IV
NA
NA
0.47 j
<10
23.2 j+
<0.5
<0.5
20
<0.2
27 j
<0.08
NA
0.58 j+
0.13 j
0.74 j+
411
0.094 j+
NA
NA
24
NA
<0.5
0.49 j+
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<1
6.5 j+
73 j
<0.5
0.15 j
26
<0.2
70
<0.08
NA
0.38 j
0.37 j
10.4
1200
1.1
NA
NA
93
<0.2
<0.5
0.74
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.3 j
<10
<100
<0.5
0.14
20.6
<0.1
<50
<0.08
NA
0.35 j+
0.43
0.5
146
<0.1
NA
NA
44.6
NA
<0.5
0.45 j
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.98
7.5 j+
<100
<0.5
0.34
22.7
<0.1
55.4
<0.08
NA
0.17 j
0.29
0.56
170
<0.1
NA
NA
78
NA
<0.5
<0.5
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.94
<10
<100
<0.5
1.6 j+
26.5
0.041 j
93.2
<0.08
NA
0.82 j+
3.7
1.7 j+
120
0.2
NA
NA
323
NA
2.9
1.6
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.26 j
5.5 j
<100
<0.5
0.13
17.8
<0.1
32 j
<0.08
NA
0.26 j
0.14
0.47 j
102
<0.1
NA
NA
43.6
NA
<0.5
1.2
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.36
12.1
<100
<0.5
0.13
21
0.01 j
<50
<0.08
NA
0.24 j
0.24
0.56
164
<0.1
NA
NA
51.4
NA
<0.5
1.3
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.12 j
3.9 j
<100
<0.5
0.16
22.8
0.011 j
32.5 j
<0.08
NA
0.18 j
0.56
0.71
266
<0.1
NA
NA
58
NA
<0.5
0.72
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.92
<10
<100
<0.5
0.2
19.7
0.011 j
31.2 j
<0.08
NA
0.24 j
0.66
0.58
96.7
<0.1
NA
NA
67
NA
<0.5
<0.5
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
0.45 B
<10
<100
<0.5
0.21
15.9
<0.1
30.4 j
<0.08
NA
0.23 j
0.98
0.37 j
164
0.036 j
NA
NA
65.7
NA
<0.5
0.43 j
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<0.3
<10
<100
<0.5
0.11
20.3
<0.1
<50
<0.08
NA
<0.5
0.19
<0.5
367
<0.1
NA
NA
57.6
NA
<0.5
<0.5
<0.05
SW-03
Active Ash Basin
WS-IV
NA
NA
0.64
<10
<100
<0.5
0.16
22.3
<0.1
<50
<0.08
NA
0.24 j
0.49
0.33 j
93.6
<0.1
NA
NA
40.5
NA
<0.5
0.4 j
<0.05
SW-04
Active Ash Basin
WS-IV
NA
NA
0.42 j
<10
54.4
<0.5
0.15 j
20
<0.2
27 j
<0.08
NA
0.72 j+
1.4
1 j+
758
0.15 j+
NA
NA
27
NA
<0.5
0.7 j+
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
0.59 j
<10
<100
<0.5
0.17 j
24
<0.2
42 j
<0.08
NA
0.22 j
0.24 j
0.41 j
34 j
<0.1
NA
NA
72
<0.2
<0.5
0.45 j
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
0.36
<10
<100
<0.5
0.15
20.4
<0.1
<50
<0.08
NA
0.25 j
0.22
0.48 j
153
<0.1
NA
NA
33.5
NA
<0.5
<0.5
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
1.3
<10
<100
<0.5
0.22
20.1
<0.1
<50
<0.08
NA
0.16 j
0.19
0.62
37.1 j
<0.1
NA
NA
50.1
NA
<0.5
<0.5
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
1.5
2.6 j+
<100
0.1 j
1.2 j+
15
0.029 j
<50
<0.08
NA
0.19 j+
0.15
1 j+
<50
<0.1
NA
NA
49.7
NA
0.63
0.5 j
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
0.28 j
<10
<100
<0.5
0.13
15.9
0.021 j
26.6 j
<0.08
NA
0.41 j
0.23
0.37 j
86.1
<0.1
NA
NA
39.6
NA
<0.5
0.62
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
0.31
3.7 j
<100
<0.5
0.16
20
<0.1
<50
<0.08
NA
2.5
0.28
0.77
184
<0.1
NA
NA
45.1
NA
<0.5
3.3
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
1.1 j+
<10
<100
<0.5
0.14
13.6
<0.1
<50
<0.08
NA
0.38 j+
0.16
8.1 j
73.4
0.91 j
NA
NA
28.6
NA
<0.5
<0.5
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
0.88
3.9 j
112
<0.5
0.23
21.7
0.012 j
31.4 j
<0.08
NA
0.37 j
0.19
0.57
296
0.1
NA
NA
34.6
NA
<0.5
<0.5
NA
Page 3 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
SPECIATIONS
Potassium
(0.45u)
Selenium
(0.45u)
Silver
(0.45u)
Sodium
(0.45u)
Strontium
(0.45u)
Thallium
(0.45u)
Vanadium
(0.45u)
Zinc
(0.45u)
Radium-226
Radium-228
Arsenic (Speciation)
As(III)
As(V)
Cr(III)
Cr(VI)
DIS
Cr(VI)
Iron (Speciation)
Fe(II)
Fe(III)
Manganese
(Speciation)
DIS
Manganese
(Speciation)
Mn(II)
Mn(IV)
Se(IV)
Se(VI)
Reporting Units
mg/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
pCi/L
pCi/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
NE
36
NE
NE
NE
NE
NE
24
11
11
NE
NE
NE
NE
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
C 1 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
C 1 ON
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
C 1 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
C 1 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
C 1 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
20
<0.1
<1
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
22
<0.1
<1
18 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
16.2
<0.1
0.17 j
<10
NA
NA
NA
NA
NA
NA
NA
<0.03
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
21.2
0.02 j
0.21 j
<10
NA
NA
NA
NA
NA
NA
NA
0.021 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
0.55
NA
NA
62.5
0.022 j
0.36
3.1 j
NA
NA
NA
NA
NA
NA
NA
<0.6
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
19.3
<0.1
0.16 j
<10
NA
NA
NA
NA
NA
NA
NA
<0.25
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (1)
Active Ash Basin
WS-Iv
<2.5
<0.31
<0.07
3.35 j
19.2
0.024 j
0.079 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (2)
Active Ash Basin
WS-Iv
<2.5
<0.31
<0.07
3.3 j
18.8
0.027 j
0.12 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (Sulfide Only 1)
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (Sulfide Only 2)
Active Ash Basin
WS-Iv
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (3)
Active Ash Basin
WS-Iv
<2.5
<0.31
<0.07
3.4 j
18.9
<0.015
0.18 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (4)
Active Ash Basin
WS-Iv
<2.5
<0.31
<0.07
3.38 j
18.6
<0.015
0.21 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
18.5
<0.1
0.22 j
11
NA
NA
NA
NA
NA
NA
NA
0.06 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
20
0.019 j
<0.3
14.2
NA
NA
NA
NA
NA
NA
NA
0.089 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
17.1
0.023 j
0.23 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
14.8
<0.1
0.23 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
15.3
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
16.9
<0.1
0.52 B
6 j,B
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
21
0.021 j+
<1
9.7 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
38
0.018 j
<1
10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
20.2
<0.1
0.075 j
4.6 j
NA
NA
NA
NA
NA
NA
NA
0.019 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
35.6
<0.1
0.37 j+
3 j
NA
NA
NA
NA
NA
NA
NA
0.023 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
0.33 j
NA
NA
57
0.029 j
0.72
3.7 j
NA
NA
NA
NA
NA
NA
NA
<0.6
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
24.1
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
<0.25
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
24.2
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
0.06 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
27.7
0.018 j
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
0.083 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
26.2
0.025 j
0.2 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
24.8
<0.1
0.18 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
22.4
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
20.5
<0.1
0.18 j,B
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
21
0.02 j+
<1
2.6 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
30
0.025 j
<1
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
18.7
<0.1
0.17 j
<10
NA
NA
NA
NA
NA
NA
NA
0.028 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
29.3
<0.1
0.32 j+
<10
NA
NA
NA
NA
NA
NA
NA
0.03 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
34.3
<0.1
0.57
<10
NA
NA
NA
NA
NA
NA
NA
<0.3
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
0.34 j
NA
NA
24.8
0.033 j
<0.3
3.1 j
NA
NA
NA
NA
NA
NA
NA
<0.25
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
24
<0.1
<0.3
14.1
NA
NA
NA
NA
NA
NA
NA
0.075 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
22.5
<0.1
0.4
9.6 j
NA
NA
NA
NA
NA
NA
NA
0.079 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-Iv
NA
<0.5
NA
NA
22.4
0.026 j
1 0.36
1 <10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Page 4 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
OTHER PARAMETERS
BOD
Bromide
Carbonate Alkalinity
COD
Fluoride
Hardness
Nitrate
Nitrogen, Kjeldahl, total
Oil and grease
Phosphate
Phosphorus
Reporting Units
mg/L
ug/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
1.8
100
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
C 1 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
18.8
NA
NA
<5
NA
NA
C 1 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
24.6
NA
NA
NA
NA
NA
C 1 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
15
NA
NA
NA
NA
NA
C 1 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
15.7
NA
NA
<5
NA
NA
C 1 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
18.6
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
13.9
NA
NA
<5
NA
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
18.5
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
16.1
NA
NA
NA
NA
NA
SC 2 DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
12.8
NA
NA
<5
NA
NA
SC-2-DN
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
13
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
11.9
NA
NA
<5
NA
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
12.5
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
12.7
NA
NA
NA
NA
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
10.9
NA
NA
<5
NA
NA
SC 2 UP
Active Ash Basin
WS-IV
NA
<100
NA
NA
<0.1
11.1
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
13.5
NA
NA
NA
NA
NA
SW-02 (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
13.6
NA
NA
NA
NA
NA
SW-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 (3)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
12.7
NA
NA
NA
NA
NA
SW-02 (4)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
13
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-03
Active Ash Basin
WS-IV
NA
NA
<10
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-04
Active Ash Basin
WS-IV
NA
NA
<10
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
Page 5 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
yt
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
pH
Temperature
Specific
Conductance
Dissolved
Oxygen
Oxidation
Reduction
Potential
Eh
Turbidity
Flow
Alkalinity
Bicarbonate
Alkalinity
Methane
Sulfide
Total
Organic
Carbon
Total
Suspended
Solids
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Reporting Units
S.U.
Deg C
umhos/cm
mg/L
mV
mV
NTUs
GPM
mg/L
mg/L
ug/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
mg/L
mg/L
15A NCAC 02B (Class C, WS-IV)
6.0-9.0
32
NE
4
NE
NE
25
NE
NE
NE
NE
NE
NE
NE
NE
NE
250
NE
250
500
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
5.2-64.2
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-04
Active Ash Basin
WS-IV
7.6
9
69
10.80
74
279
4.1
NM
11.5
11.5
NA
<0.1
1.4
<2.6
36.3 j
28.7
5.6
23.6
3.1
43
SW-04
Active Ash Basin
WS-IV
6.9
6
52
11.30
97
302
4.6
NM
9.8
9.8
NA
<0.1
1.4
<2.5
<50
3.08
1.3
21
10.2
36
SW-04
Active Ash Basin
WS-IV
6.6
18
49
5.70
41
246
6.9
NM
10.3
10.3
NA
<0.1
1.8
3A
<50
3.1
3.8
18
3.3
45
SW-08
Active Ash Basin
WS-IV
8.0
27
321
9.63
118
323
1.5
NM
52
52
18.7
<0.1
4.7
7.7
37.9 j
37.5
7.8
96
81.8
211
SW-08
Active Ash Basin
WS-IV
7.6
31
376
5.70
157
362
6.3
NM
96.2
96.2
37.9
<0.1
4
8.2
34.5 j
44.7
5.7
108
78.4
226
SW-08
Active Ash Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
17.3
17.3
<10
<0.1
1.2
5.9
<50
4.35
2.9
22
0.98 j
38
SW-08
Active Ash Basin
WS-IV
7.6
12
397
8.60
51
256
5.3
NM
43
43
15.4
<0.1
2.8
6
34.1 j
46.4
10
153
136
237
SW-08
Active Ash Basin
WS-IV
7.5
8
327
8.90
103
308
5.5
NM
35.8
35.8
<10
<0.1
1.7
2.9
34.8 j
37.6
7.7
109
96.6
207
SW-08
Active Ash Basin
WS-IV
8.1
27
289
5.90
607
812
5.5
NM
45
45
39.3
<0.1
3.4
<2.5
43.3 j
30.5
7.5
101
70.9
165
SW-08
Active Ash Basin
WS-IV
8.9
34
353
5.90
138
343
5.3
NM
60.6
60.6
NA
<0.1
7.1
17.4
49.4 j
35.5
10.3
120
83.2
222
SW-08
Active Ash Basin
WS-IV
7.5
9
295
7.70
105
310
2.0
NM
44.7
44.7
NA
<0.1
3.3
<2.5
39.8 j
36.5
5.4
91.1
90.4
185
SW-08
Active Ash Basin
WS-IV
7.7
8
344
9.30
71
276
5.9
NM
48.8
48.8
NA
<0.1
3.2
5.6
<50
41.8
7.4
106
106
220
SW-08
Active Ash Basin
WS-IV
7.4
23
280
5.10
80
285
2.1
NM
56
56
NA
<0.1
3.9
<2.5
30.5 j
37.4
5.3
87.1
66.6
173
SW-BRAB-01 (1)
Active Ash Basin
WS-IV
7.3
6
57
11.47
173
378
34.6
NM
32
32
15.3 N2
NA
1.2
69.4
179
18.9
11.2
206
38
113
SW-BRAB-01 (2)
Active Ash Basin
WS-IV
7.3
6
58
11.51
168
373
14.8
NM
26.9
26.9
11 N2
NA
0.78 j
32
128
14.3
8.9
153
28
96
SW-BRAB-01 (Sulfide Only 1)
Active Ash Basin
WS-IV
7.4
7
83
16.4 S
-262
-57
11.7
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (Sulfide Only 2)
Active Ash Basin
WS-IV
7.4
7
82
16.22 S
-261
-56
11.7
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (3)
Active Ash Basin
WS-IV
6.4
7
75
0.29
178
383
9.3
NM
39.5
39.5
<10 N2
<0.1
0.97 j
5.8
54.2
7.79
5.6
77.2
13.2
85
SW-BRAB-01 (4)
Active Ash Basin
WS-IV
6.4
7
73
0.20
181
386
11.2
NM
39.5
39.5
<10 N2
<0.1
0.86 j
10.9
55.9
7.96
5.6
78.7
13.2
82 D6
SW-BRAB-01
Active Ash Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01
Active Ash Basin
WS-IV
7.2
24
74
7.26
122
327
9.2
NM
16.1
16.1
NA
<0.1
1.2
13
31.475 j
6.21
8.6
46
4.3
40
SW-BRAB-02 (1)
Active Ash Basin
WS-IV
7.2
9
320
8.90
185
390
5.8
NM
16.6
16.6
<10 N2
NA
0.95 j
<2.8
641
38.2
51
265
46.3
220
SW-BRAB-02 (2)
Active Ash Basin
WS-IV
7.2
9
321
10.84
185
390
6.1
NM
17.9
17.9
<10 N2
NA
0.89 j
<2.9
686
40
53.2
275
47.9
219
SW-BRAB-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
7.2
9
257
10.86
201
406
9.9
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
7.2
9
252
10.80
201
406
6.1
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (3)
Active Ash Basin
WS-IV
7.1
8
245
11.40
226
431
7.4
NM
59.3
59.3
<10 N2
<0.1
0.78 j
3.7
499
29.7
40.3
209
34.8
223
SW-BRAB-02 (4)
Active Ash Basin
WS-IV
7.1
8
245
11.38
227
432
8.5
NM
59.3
59.3
<10 N2
<0.1
0.85 j
2.9
508
29.2
40.4
212
35
219
SW-BRAB-02
Active Ash Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02
Active Ash Basin
WS-IV
7.2
24
141
7.36
1 145
350
8.9
NM
17.4
17.4
NA
<0.1
1.3
13
300
15.5
23
147
13
100
SW-BRAB-03 (1)
Active Ash Basin
WS-IV
7.1
8
274
11.35
185
390
7.8
NM
17.2
17.2
<10 N2
NA
0.91 j
3.3
577
34.7 M1
45.5
245
41.2
217
SW-BRAB-03 (2)
Active Ash Basin
WS-IV
7.2
8
280
11.20
185
390
6.4
NM
17
17
<10 N2
NA
0.89 j
<2.9
551
33.4
42.4
233
38.4
176
SW-BRAB-03 (Sulfide Only 1)
Active Ash Basin
WS-IV
7.2
8
237
11.42
200
405
9.8
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (Sulfide Only 2)
Active Ash Basin
WS-IV
7.2
8
238
11.28
201
406
9.6
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (3)
Active Ash Basin
WS-IV
7.0
8
226
11.56
228
433
7.2
NM
39.5
39.5
<10 N2
<0.1
1
2.8
407
25.6
34.3
174
29.5
185
SW-BRAB-03 (4)
Active Ash Basin
WS-IV
7.0
8
245
11.46
226
431
7.9
NM
39.5
39.5
<10 N2
<0.1
0.8 j
13.1
447
26.1
34.6
1 189
29.8
203
SW-BRAB-03
Active Ash Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03
Active Ash Basin
WS-IV
7.4
23
129
7.55
150
355
10.9
NM
17.5
17.5
NA
<0.1
1.5
14
250
13.9
20
128
11
67
SW-BRBG (1)
Active Ash Basin
WS-IV
7.3
7
53
10.96
185
390
7.3
NM
17.2
17.2
14.8 N2
<0.1
0.77 j
5.6
<25
4.08
2.7
27.5
2.6
78
SW-BRBG (2)
Active Ash Basin
WS-IV
7.2
7
53
11.08
183
388
6.5
NM
15.9
15.9
11.8 N2
<0.1
0.6 j
4.1
<25
4.18
2.8
27
2.8
<25
SW-BRBG (3)
Active Ash Basin
WS-IV
6.7
8
46
9.97
245
450
9.2
NM
14
14
11 N2
<0.1
0.88 j
4
<25
2.96
2.8
24.7
1.8
<25
SW-BRBG (4)
Active Ash Basin
WS-IV
6.6
9
46
8.95
226
431
8.9
NM
14
14
<10 N2
<0.1
1.1
3.3
<25
3
2.7
23.3
1.7
<21
SW-SBRBG (1)
Active Ash Basin
WS-IV
7.2
6
69
10.39
179
384
9.1
NM
20.2
20.2
28.7 N2
<0.1
0.7 j
3.9
<25
4.71
4.2
31.1
2.1
55
SW-SBRBG (2)
Active Ash Basin
WS-IV
7.3
6
68
9.88
180
385
9.7
NM
20.3
20.3
28.1 N2
<0.1
0.59 j
3.6
<25
4.75
4.2
31.2
2.2
60
SW-SBRBG (3)
Active Ash Basin
WS-IV
6.9
8
68
9.67
200
405
13.9
NM
19.9
19.9
41.5 N2
<0.1
0.88 j
7
<25
4.22
4.5
30
2.1
34 D6
SW-SBRBG (4)
Active Ash Basin
WS-IV
7.8
8
68
9.50
213
418
14.5
NM
20.1
20.1
45.7 N2
<0.1
0.7 j
6.1
<25
4.26
4.5
30.6
2.1
37
SW-SC-01 (1)
Active Ash Basin
WS-IV
7.1
7
53
10.60
-201
4
7.7
NM
9.2
9.2
<10 N2
<0.1
1.1
<2.9
<25
2.84
4.1
18.6
2.6
<25
SW-SC-01 (2)
Active Ash Basin
WS-IV
7.1
7
54
10.58
-198
7
7.6
NM
9.6
9.6
<10 N2
<0.1
1.2
<2.9
<25
2.83
4.1
19.7
2.6
36
SW-SC-01 (3)
Active Ash Basin
WS-IV
1 6.8
10
48
9.11
-200
5
10.3
NM
9.7
9.7
10.7 N2
<0.1
1.3
4.2
<25
2.73
4.2
18.6
2.7
<25
SW-SC-01 (4)
Active Ash Basin
WS-IV
6.8
10
47
8.58
-202
3
8.3
NM
9.9
9.9
<10 N2
<0.1
1.1
<2.5
<25
2.69
4.1
19
2.6
<21
SW-SC-02 (1)
Active Ash Basin
WS-IV
7.2
6
57
10.60
131
336
8.9
NM
7.7
7.7
<10 N2
<0.1
1.1
<2.6
25.8 j
3.54
5.1
23.4
3.7
31 D6
SW-SC-02 (2)
Active Ash Basin
WS-IV
7.2
6
58
11.76
132
337
9.0
NM
9
9
<10 N2
<0.1
1.2
<2.5
46.9 j
4.29
6.3
26.2
4.9
<25
SW-SC-02 (3)
Active Ash Basin
WS-IV
6.7
9
60
9.27
-284
-79
7.5
NM
9
9
<10 N2
<0.1
1.3
3.9
42.8 j
3.77
5.3
24.4
3.8
<25
SW-SC-02 (4)
Active Ash Basin
Ws -IV
6.7
9
60
8.98
-251
-46
7.2
NM
9.2
9.2
<10 N2
<0.1
1
3
38.7 j
3.65
6.7
24
5.3
43
SW-SC-03 (1)
Active Ash Basin
WS-IV
7.2
5
66
11.34
180
385
10.8
NM
9.3
9.3
<10 N2
<0.1
1.2
3.3
35.2 j
3.96
5.3
26
3.9
51
Page 6 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
(Nitrate
as N)
Nitrate +
Nitrite
Potassium
Selenium
Silver
Sodium
Thallium
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg-N/L
mg/L
ug/L
ug/L
mg/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
10
1000
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
0.012
NE
25
NE
30
NE
5
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
69.2-1760
<0.1-<5 NE
NE
NE
NE
NE
NE
NE
NE
225-3630
NE
NE
NE
17.8-160
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-04
Active Ash Basin
WS-IV
72.9 j
<0.5
0.26 B
23.3
<0.1
<0.08
0.018 j
0.23 j
0.19
0.26 j
767
0.095 j
NA
1.69
32.2
0.00122
<0.5
0.32 j
NA
0.33
<5
<0.5
NA
3.31 j
<0.1
SW-04
Active Ash Basin
WS-IV
160
<0.5
0.15
22
<0.1
<0.08
<0.025 M1
<0.5
0.31
<0.5
751
0.12
0.62
1.39
40.9
0.00118
<0.5
<0.5
NA
0.47
<5
<0.5
NA
<5
<0.1
SW-04
Active Ash Basin
WS-IV
189
<0.5
0.23
21.1
<0.1
<0.08
0.097
0.42 j
0.36
0.43 j
770
0.24
0.62
1.43
35.3
0.00158
<0.5
0.51
NA
0.44
<5
<0.5
NA
2.54 j
<0.1
SW-08
Active Ash Basin
WS-IV
147
<0.5
0.67
18.1
0.013 j+
<0.08
0.072
0.52
0.45
0.51 j
472
0.13
NA
9.8
70
0.000916
0.25 j
1.5
NA
0.11
4.49 j
<0.5
NA
4.61 j
0.021 j
SW-08
Active Ash Basin
WS-IV
207
<0.5
1.8
34.1
0.028 j
<0.08
0.028 j
0.61
0.32
0.52
561
0.14
NA
10.4
99.4
0.00131 j
0.45 j
1.6
NA
0.079
6.85
<0.5
NA
4.07 j
0.041 j
SW-08
Active Ash Basin
WS-IV
89.7 j
<0.5
0.18
22.1
0.02 j
<0.08
<0.03
0.51
0.14
0.46 j
214
0.1
NA
1.34
8
<0.2
<0.5
<0.5
NA
0.16
<5
<0.5
NA
3.28 j
0.031 j
SW-08
Active Ash Basin
WS-IV
299
0.11 j
0.57
44.2
0.045 j
<0.08
0.073 j,D3
1
0.53
0.62
456
0.22
NA
13.6
33
0.000783
0.67
1.8
NA
<0.02
4.66 j
<0.5
NA
5.04
0.023 j
SW-08
Active Ash Basin
WS-IV
131
<0.5
0.45
21.1
0.01 j
<0.08
0.08 j,D3
0.44 j
0.31
1.1
387
0.16
NA
9.61
17.6
0.000729
0.48 j
1.2
NA
<0.02
3.3 j
<0.5
NA
5.32
<0.1
SW-08
Active Ash Basin
WS-IV
80.2 j
0.11 j
1
20.5
0.037 j+
<0.08
0.073 j,D3
0.24 j
0.33
0.52 j+
436
0.097 j
NA
9.92
63.6
0.00116 j+
0.68
1.2
NA
<0.02
4.78 j
0.37 j+
NA
5.82
0.073 j+
SW-08
Active Ash Basin
WS-IV
81.3 j
0.17 j
2.1
32.7
0.01 j
<0.08
0.071 SI
0.64 S1
0.26 S1
0.52 S1
280
0.093 j
NA
13.2
87.9
0.00113
0.98 S1
1.4
NA
<0.02
6.44
<0.5
NA
7.44
<0.1
SW-08
Active Ash Basin
WS-IV
<100
<0.5
0.72 B,S1
22.6
<0.1
<0.08
0.016 j
0.27 j
0.1
0.37 j
245
0.065 j
NA
9.53
14.4
0.00067
0.52
0.97
NA
<0.02
5.12
<0.5
NA
3.26 j
<0.1
SW-08
Active Ash Basin
WS-IV
382
<0.5
0.54
28.2
<0.1
<0.08
0.03 S1
<0.5
0.25
0.52 S1
539
0.16
<0.5
11.3
19
0.00133 S1
<0.5
1.6
NA
<0.02
<5
<0.5
NA
<5
<0.1 B
SW-08
Active Ash Basin
WS-IV
193
<0.5
0.51
30.4
<0.1
<0.08
0.032 S1
0.34 j,S1
0.18
0.61
375
0.14
0.97
7.99
30.3
0.00101
0.4 j
1.6 S1
NA
<0.02
4.15 j
<0.5
NA
4.33 j
<0.1
SW-BRAB-01 (1)
Active Ash Basin
WS-IV
1320
<0.1
4.3
49.5
0.067j
0.083
0.76
1.6
1.4
0.55
2480
0.95
NA
5.89
1040
0.00103 B
0.56
0.91
NA
0.25
3.19j
<0.31
<0.07
5.61
0.019j
SW-BRAB-01 (2)
Active Ash Basin
WS-IV
1000
<0.1
3.2
40.6
0.065 j
0.07 j
1
1.4
1.1
0.37 j
1960
0.84
NA
4.58
755
0.000682 B
0.46 j
0.78
NA
0.26
2.64 j
0.41 j
<0.07
5.4
<0.015
SW-BRAB-01 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (3)
Active Ash Basin
WS-IV
249
<0.1
1.5
21.4 B
0.018 j
<0.05
0.043 j,D3
0.63
0.37 B
0.54 B
666
0.25
NA
2.62
290
0.00154
0.24 j
<0.44
NA
0.24
<2.5
<0.31
<0.07
4.33 j
<0.015
SW-BRAB-01 (4)
Active Ash Basin
WS-IV
291
<0.1
1.6
21.5 B
0.022 j
<0.05
0.068 j,D3
0.55
0.4
0.8 B
651
0.28
NA
2.65
298
0.00141
0.22 j
0.49 j
NA
0.24
<2.5
<0.31
<0.07
4.46 j
<0.015
SW-BRAB-01
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
<0.2
SW-BRAB-01
Active Ash Basin
WS-IV
414
<1
0.351 j
18
<1
<1
0.12
0.65 j
0.373 j
0.494 j
710
<1
<5
1.52
75
<0.05
0.21 j
<1
NA
0.274
1.52
<1
NA
4.25
<0.2
SW-BRAB-02 (1)
Active Ash Basin
WS-IV
154
2.1
8.2
89.6
0.059 j
0.19
0.41
0.73
3
2.1
353
0.15
NA
4.31
220
0.00191 B
29.6
7.4
NA
0.76
3.5 j
3.7
<0.07
8.64
0.67
SW-BRAB-02 (2)
Active Ash Basin
WS-IV
147
2.1
8.6
94.3
0.046 j
0.18
0.38
0.78
3.1
2.2
350
0.14
NA
4.49
234
0.00191 B
31
7.5
NA
0.78
3.65 j
3.8
<0.07
8.94
0.65
SW-BRAB-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (3)
Active Ash Basin
WS-IV
194
1.6
6.8
72.6
0.048 j
0.2
0.17
0.81
2.2
2.2
373
0.19
NA
3.6
173
0.00211
23.7
5.3
NA
0.66
2.98 j
3.2
<0.07
7.39
0.51
SW-BRAB-02 (4)
Active Ash Basin
WS-IV
226
1.7
6.8
74.1
0.049 j
0.17
0.2
1.1
2.4
2.5
424
0.22
NA
3.59
177
0.00232
23.9
5.8
NA
0.67
2.92 j
3.3
<0.07
7.38
0.52
SW-BRAB-02
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.527
SW-BRAB-02
Active Ash Basin
WS-IV
456
<1
4.67
26
<1
<1
0.11
0.596j
0.405j
0.634j
659
<1
7
2.36
50
<0.05
7.29
0.77j
NA
0.19
1.94
0.469j
NA
5.34
0.099j
SW-BRAB-03 (1)
Active Ash Basin
WS-IV
129
1.8
7.3
82.5
0.073j
0.18
0.21
0.71
2.7
2
381
0.19
NA
3.92
206
0.00174 B
26.2
6.8
NA
0.69
3.32j
3.4
<0.07
7.69
0.62
SW-BRAB-03 (2)
Active Ash Basin
WS-IV
134
1.7
6.9
79.2
0.06 j
0.17
0.36
0.68
2.5
1.8
370
0.18
NA
3.9
196
0.00169 B
24.1
6.3
NA
0.69
3.22 j
3.4
<0.07
8.05
0.63
SW-BRAB-03 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (3)
Active Ash Basin
WS-IV
253
1.4
6
61.7
0.051 j
0.16
0.17 M1
0.84
2.1
2.1
447
0.23
NA
3.25
150
0.00193
20.3
4.9
NA
0.6
2.65 j
2.7
<0.07
6.93
0.51
SW-BRAB-03 (4)
Active Ash Basin
WS-IV
211
1.4
6
66.3
0.047 j
0.13
0.17
0.79
2
2.1
415
0.22
NA
3.3
162
0.00204
20.7
4.8
NA
0.6
2.71 j
2.8
<0.07
7.04
0.46
SW-BRAB-03
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.413
SW-BRAB-03
Active Ash Basin
WS-IV
487
<1
3.83
25
<1
<1
0.088
0.663 j
0.439 j
0.665 j
684
0.335 j
6
2.2
48
<0.05
6.18
0.482 j
NA
0.188
1.87
0.345 j
NA
5.15
0.086 j
SW-BRBG (1)
Active Ash Basin
WS-IV
179
<0.1
0.13
13.8
<0.01
<0.05
0.078
0.44 j
0.11
0.39 j
445
0.17
NA
1.31
29.7
0.000615
<0.11
<0.44
NA
0.23
<2.5
<0.31
<0.07
4.44 j
<0.015
SW-BRBG (2)
Active Ash Basin
WS-IV
236
<0.1
0.13
13.8
0.014 j
0.062 j
0.084 j,D3
0.5 j
0.16
0.44 j
506
0.22
NA
1.5
34.1
0.000969
<0.11
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.87 j
<0.015
SW-BRBG (3)
Active Ash Basin
WS-IV
242
<0.1
0.16
14.2
0.011 j
<0.05
0.09 j
0.51
0.14
0.48 j
454
0.25
NA
1.14
30.4
0.000889
<0.11
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.14 j
<0.015
SW-BRBG (4)
Active Ash Basin
WS-IV
248
<0.1
0.14
13.4
0.011 j
<0.05
0.074 j,D3
0.59
0.14
0.49 j
438
0.24
NA
1.13
29.8
0.00089
<0.11
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.16 j
<0.015
SW-SBRBG (1)
Active Ash Basin
WS-IV
191
<0.1
0.16
15.9
<0.01
<0.05
<0.041 D3
0.62
0.21
0.6
757
0.22
NA
1.99
45.6
0.00946
<0.11
<0.44
NA
0.43
<2.5
<0.31
<0.07
4.85 j
<0.015
SW-SBRBG (2)
Active Ash Basin
WS-IV
174
<0.1
0.15
15.8
<0.01
<0.05
<0.041 D3
0.67
0.21
0.66
759
0.21
NA
2.01
44.7
0.00127
<0.11
0.53
NA
0.43
<2.5
<0.31
<0.07
4.88 j
<0.015
SW-SBRBG (3)
Active Ash Basin
WS-IV
343
<0.1
0.22
20.1
0.012 j
<0.05
0.048 j,D3
0.94
0.42
0.76
1090
0.41
NA
1.85
108
0.00109
<0.11
<0.44
NA
0.37
<2.5
<0.31
<0.07
5.12
<0.015
SW-SBRBG (4)
Active Ash Basin
WS-IV
333
<0.1
0.2
29
<0.01
<0.05
0.053 j,D3
0.77
0.38
0.67
1080
0.38
NA
1.86
109
8.71E-04
<0.11
<0.44
NA
0.37
<2.5
<0.31
<0.07
5.22
<0.015
SW-SC-01 (1)
Active Ash Basin
WS-IV
139
<0.1
0.23
21.8
0.01 j
<0.05
0.093 j,D3
0.54
0.44
0.71
1020
0.21
NA
1.4
62.1
0.000761
<0.11
<0.44
NA
0.45
<2.5
<0.31
<0.07
2.87 j
<0.015
SW-SC-01 (2)
Active Ash Basin
WS-IV
123
<0.1
0.24
23.3
0.023 j
<0.05
0.1 j,D3
0.56
0.43
0.62
1040
0.21
NA
1.42
65.4
0.000751
<0.11
<0.44
NA
0.45
<2.5
<0.31
<0.07
2.89 j
0.022 j
SW-SC-01 (3)
Active Ash Basin
WS-IV
208
<0.1
0.24
21.4
0.01 j
<0.05
0.068 j,D3
0.63
0.43
0.41 j
1120
0.25
NA
1.36
62.8
0.000979
<0.11
0.45 j
NA
0.45
<2.5
<0.31
<0.07
3.03 j
<0.015
SW-SC-01 (4)
Active Ash Basin
WS-IV
169
<0.1
0.24
21.4
0.012 j
<0.05
0.25
0.57
0.37
0.36 j
1060
0.21
NA
1.35
59.4
0.00117
<0.11
<0.44
NA
0.44
<2.5
<0.31
<0.07
3.07 j
<0.015
SW-SC-02 (1)
Active Ash Basin
WS-IV
177
<0.1
0.22
22.3
0.02 j
<0.05
0.065 j,D3
0.47 j
0.52
0.44 j
1030
0.22
NA
1.49
100
0.000872
<0.11
0.48 j
NA
0.43
<2.5
<0.31
<0.07
3.46 j
<0.015
SW-SC-02 (2)
Active Ash Basin
WS-IV
159
<0.1
0.24
23.5
0.019 j
<0.05
0.075 j, D3,M1
0.99
0.72
0.54
1070
0.28
NA
1.56
134
0.000999
<0.11
0.72
NA
0.43
<2.5
<0.31
<0.07
3.15 j
0.017 j
SW-SC-02 (3)
Active Ash Basin
WS-IV
165
<0.1
0.29
22.5
0.021 j
<0.05
0.056 j,D3
0.62
0.76
0.41 j
1090
0.22
NA
1.47
126
0.00121
<0.11
0.45 j
NA
0.43
<2.5
<0.31
<0.07
3.3 j
<0.015
SW-SC-02 (4)
Active Ash Basin
WS-IV
158
0.17 j
0.6
23
0.014 j
<0.05
0.067 j,D3
0.7
0.63
1.9
1070
0.48
NA
1.47
123
0.00108
0.71
0.47 j
NA
0.43
<2.5
<0.31
<0.07
3.27 j
<0.015
SW-SC-03 (1)
Active Ash Basin
WS-IV
205
<0.1
0.26
21.5
0.029 j
<0.05
<0.041 D3
0.6
0.43
0.45 j
1050
0.29
NA
1.55
91.2
8.74E-04
<0.11
0.54
NA
0.44
<2.5
<0.31
0.081 j
3.11 j
0.069 j
Page 7 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Tin
Titanium
Vanadium
Zinc
Aluminum
(0.45u)
Antimony
(0.45u)
Arsenic
(0.45u)
Barium
(0.45u)
Beryllium
(0.45u)
Boron
(0.45u)
Cadmium
(0.45u)
Calcium
(0.45u)
Chromium
(0.45u)
Cobalt
(0.45u)
Copper
(0.45u)
Iron
(0.45u)
Lead
(0.45u)
Lithium
(0.45u)
Magnesium
(0.45u)
Manganese
(0.45u)
Mercury
(0.45u)
Molybdenum
(0.45u)
Nickel
(0.45u)
Phosphorus
(0.45u)
Reporting Units
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
ISO
NE
6.5
NE
0.15
NE
24
NE
2.7
NE
0.54
NE
NE
NE
NE
NE
16
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE NE
NE
NE
NE
I NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-04
Active Ash Basin
WS-IV
NA
NA
0.42 B
<10
<100
<0.5
0.2
16.7
<0.1
28.4 j
<0.08
NA
0.38 j
0.22
0.43 j
72.9
0.05 j
NA
NA
29.4
NA
<0.5
0.34 j
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<0.3
<10
<100
<0.5
0.14
20.1
<0.1
<50
<0.08
NA
<0.5
0.27
<0.5
324
<0.1
NA
NA
32.1
NA
<0.5
<0.5
<0.05
SW-04
Active Ash Basin
WS-IV
NA
NA
0.59
<10
<100
<0.5
0.16
21.8
<0.1
<50
<0.08
NA
0.22 j
0.28
0.99
169
0.052 j,B
NA
NA
31.8
NA
<0.5
0.46 j
<0.05
SW-08
Active Ash Basin
WS-IV
NA
NA
0.65
<10
<100
<0.5
0.6
11.7
<0.1
28.5 j
<0.08
NA
0.3 j
0.36
0.93
185
<0.1
NA
NA
54.6
NA
0.29 j
3
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
1.2
<10
<100
<0.5
1.6
33.3
0.015 j
38 j
<0.08
NA
0.52 j+
0.21
2.4
89
<0.1
NA
NA
71.8
NA
0.44 j
1.3
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
0.4
<10
64.6 j
<0.5
0.15
23.3
<0.1
<50
<0.08
NA
0.3 j
0.11
0.7
95.1
<0.1
NA
NA
7.8
NA
<0.5
<0.5
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
1.2
<10
<100
0.11 j
0.43
38.2
0.013 j
61.6
<0.08
NA
0.3 j
0.31
0.55
54.3
<0.1
NA
NA
29.6
NA
0.69
1.6
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
0.59
<10
<100
<0.5
0.38
20.7
<0.1
33.3 j
<0.08
NA
0.17 j
0.21
0.58
87.2
<0.1
NA
NA
10.8
NA
0.47 j
1.1
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
0.35
5 j
<100
<0.5
0.85
19
0.016 j
49.8 j
<0.08
NA
<0.5
0.29
10.6
93.3
1.2
NA
NA
52.7
NA
0.68
1.2
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
1.8
<10
<100
0.14 j
2
27.4
0.014 j
46.9 j
<0.08
NA
0.15 j
0.2
0.74
79.5
<0.1
NA
NA
62.8
NA
0.9
1.4
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
0.73 B,S1
<10
<100
<0.5
0.67
16.8
<0.1
31.4 j
<0.08
NA
0.18 j
0.1
0.36 j
182
0.062 j
NA
NA
11.6
NA
0.56
1
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
0.84
<10
<100
<0.5
0.42
26.3
<0.1
<50
<0.08
NA
<0.5
0.19
<0.5
199
<0.1
NA
NA
11.7
NA
<0.5
1.2
<0.05
SW-08
Active Ash Basin
WS-IV
NA
NA
0.61
<10
407
<0.5
0.5
30.4
<0.1
77.9
<0.08
NA
0.15 j
0.13
0.85 B
58
0.048 j
NA
NA
22.2
NA
0.45 j
1.6
<0.05
SW-BRAB-01 (1)
Active Ash Basin
WS-IV
NA
NA
2.9
6.8 j
56.9 j
<0.1
2.4
32.1
<0.01
143
<0.05
14.9
0.21 j
0.64
<0.11
286
<0.09
NA
4.68
752
0.00112
0.42 j
<0.44
NA
SW-BRAB-01 (2)
Active Ash Basin
WS-IV
NA
NA
2.5
5.4 j
61.8 j
<0.1
1.5
25
<0.01
93.4
<0.05
10.4
0.88
0.43
1.3
262
<0.09
NA
3.44
462
0.000944
0.31 j
0.57
NA
SW-BRAB-01 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (3)
Active Ash Basin
WS-IV
NA
NA
0.9
<2.5
51.7 j
<0.1
0.99
18.8
<0.01
54.2
<0.05
7.72
0.27 j
0.27
0.43 j
192
<0.09
NA
2.6
258
0.00073
0.2 j
<0.44
NA
SW-BRAB-01 (4)
Active Ash Basin
WS-IV
NA
NA
0.97
3.1 j
74 j
<0.1
0.85
17.9
<0.01
44.8 j
<0.05
6.89
0.25 j
0.37
9.8
195
0.38
NA
2.32
221
0.000602
0.16 j
<0.44
NA
SW-BRAB-01
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01
Active Ash Basin
WS-IV
NA
NA
1.15
3.136j
6.085j
<1
<1
15
<1
32.723j
<1
5.92
<1
<1
0.335j
27
<1
2.26j
1.42
51
<0.05
0.271j
<1
<0.05
SW-BRAB-02 (1)
Active Ash Basin
WS-IV
NA
NA
4.1
10.1
81.7 j
1.9
4.5
90.3
0.025 j
692
0.17
38.8
0.37 j
2.7
1.1
46.6 j
<0.09
NA
4.39
226
0.00113
29.2
6.8
NA
SW-BRAB-02 (2)
Active Ash Basin
WS-IV
NA
NA
4.1
10.9
<50
2
4.9
91.5
0.014 j
707
0.18
39.4
0.4 j
2.7
1.3
52.8
<0.09
NA
4.52
232
0.0014
29.3
6.8
NA
SW-BRAB-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (3)
Active Ash Basin
WS-IV
NA
NA
3.5
8.1 j
58.3 j
1.5
3.7
67.6
0.025 j
505
0.15
31
0.43 j
2
1.6
75.1
<0.09
NA
3.76
162
0.000601
22.1
5
NA
SW-BRAB-02 (4)
Active Ash Basin
WS-IV
NA
NA
3.7
9.4 j
50.2 j
1.5
3.7
67.3
0.02 j
497
0.11
30.7
0.5
1.9
1.4
72.4
<0.09
NA
3.74
161
0.00147
21.9
4.9
NA
SW-BRAB-02
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02
Active Ash Basin
WS-IV
NA
NA
2.06
4.8743
12
<1
4.11
22
<1
263
<1
13.8
<1
<1
<1
18
<1
6
2.1
25
<0.05
6.98
<1
<0.05
SW-BRAB-03 (1)
Active Ash Basin
WS-IV
NA
NA
3.6
9.8 j
61.9 j
1.7
3.9
76.2
0.029 j
568
0.13
34
0.33 j
2.2
0.93
70.5
<0.09
NA
3.87
188
0.000998
23.9
5.9
NA
SW-BRAB-03 (2)
Active Ash Basin
WS-IV
NA
NA
3.4
8.7 j
58 j
1.7
3.9
77.9
0.032 j
582
0.17
33.3
0.51
2.3
1
71.9
<0.09
NA
3.9
192
0.00104
24.3
5.9
NA
SW-BRAB-03 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (3)
Active Ash Basin
WS-IV
NA
NA
3.5
7.3 j
57.4 j
1.4
3.2
59.8
0.024 j
430
0.14
26.9
0.5 j
1.7
1.3
72.9
<0.09
NA
3.39
143
6.69E-04
19.4
4.5
NA
SW-BRAB-03 (4)
Active Ash Basin
WS-IV
NA
NA
3.3
7.7 j
<50
1.3
3.1
58.2
0.031 j
418
0.17
26.3
0.58
1.7
1.3
75.6
<0.09
NA
3.34
139
0.000636
18.9
4.2
NA
SW-BRAB-03
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03
Active Ash Basin
WS-IV
NA
NA
1.97
3.126 j
12
<1
3.67
22
<1
250
<1
13.6
0.357 j
<1
0.347 j
28
<1
6
2.1
25
<0.05
6.17
<1
<0.05
SW-BRBG (1)
Active Ash Basin
WS-IV
NA
NA
0.94
47.2 B
<50
<0.1
0.079 j
12.6
<0.01
<25
<0.05
4.03
0.26 j
0.033 j
0.23 j
98.9
<0.09
NA
1.36
16.8
0.000687 B
<0.11
<0.44
NA
SW-BRBG (2)
Active Ash Basin
WS-IV
NA
NA
0.99
4.3 j,B
<50
<0.1
0.082 j
12.8
<0.01
<25
<0.05
4.02
0.17 j
0.049 j
0.24 j
104
<0.09
NA
1.35
17.1
0.000684 B
<0.11
<0.44
NA
SW-BRBG (3)
Active Ash Basin
WS-IV
NA
NA
1 B
<2.5
<50
<0.1
0.1
11.8
<0.01
<25
<0.05
3.2
0.16 j
0.048 j
0.34 j
50.1
<0.09
NA
1.17
18.1
<0.00025
<0.11
<0.44
NA
SW-BRBG (4)
Active Ash Basin
WS-IV
NA
NA
1.1 B
<2.5
<50
<0.1
0.091 j
12.1
<0.01
<25
<0.05
3.25
0.14 j
0.045 j
0.31 j
46.8 j
<0.09
NA
1.17
18.3
<0.00025
<0.11
<0.44
NA
SW-SBRBG (1)
Active Ash Basin
WS-IV
NA
NA
1.2
2.8 j,B
<50
<0.1
0.097 j
14.9
<0.01
<25
<0.05
4.5
0.14 j
0.091 j
0.35 j
137
<0.09
NA
2.01
29.3
8.27E-04 B
<0.11
<0.44
NA
SW-SBRBG (2)
Active Ash Basin
WS-IV
NA
NA
1.1
3.7 j,B
<50
<0.1
0.1
14.4
<0.01
<25
<0.05
4.58
0.25 j
0.097 j
0.35 j
142
<0.09
NA
2
29.8
0.000612 B
<0.11
<0.44
NA
SW-SBRBG (3)
Active Ash Basin
WS-IV
NA
NA
1.8 B
2.9 j
<50
<0.1
0.14
16.7
<0.01
<25
<0.05
4.56
0.34 j
0.17
0.78
135
<0.09
NA
1.94
79.6
0.000655
<0.11
<0.44
NA
SW-SBRBG (4)
Active Ash Basin
WS-IV
NA
NA
1.7 B
2.9 j
<50
<0.1
0.11
16.8
<0.01
<25
<0.05
4.52
0.29 j
0.16
0.28 j
129
<0.09
NA
1.93
79.8
0.000446 j
<0.11
<0.44
NA
SW-SC-01 (1)
Active Ash Basin
WS-IV
NA
NA
0.67
4.9 j
<50
<0.1
0.13
20.9
<0.01
<25
<0.05
2.77
0.22 j
0.32
0.39 j
92.5
<0.09
NA
1.4
62.3
0.000724 B
<0.11
<0.44
NA
SW-SC-01 (2)
Active Ash Basin
WS-IV
NA
NA
0.72
5 j
<50
0.13 j
0.12
20.7
<0.01
<25
<0.05
2.74
0.33 j
0.32
0.33 j
63.7
<0.09
NA
1.4
61.4
0.000996 B
<0.11
<0.44
NA
SW-SC-01 (3)
Active Ash Basin
WS-IV
NA
NA
0.86 B
<2.5
<50
0.13 j
0.15
20.7
<0.01
<25
<0.05
2.99
0.34 j
0.34
0.29 j
53.2
<0.09
NA
1.43
68
0.000659
<0.11
<0.44
NA
SW-SC-01 (4)
Active Ash Basin
WS-IV
NA
NA
0.72 B
<2.5
<50
<0.1
0.14
20.5
<0.01
<25
<0.05
2.93
0.3 j
0.3
0.26 j
138
<0.09
NA
1.42
56.5
6.88E-04
<0.11
<0.44
NA
SW-SC-02 (1)
Active Ash Basin
WS-IV
NA
NA
0.69
2.7 j,B
<50
<0.1
0.12
23.1
<0.01
45 j
<0.05
4.11
0.28 j
0.62
0.35 j
88.1
<0.09
NA
1.55
131
0.000613 B
<0.11
<0.44
NA
SW-SC-02 (2)
Active Ash Basin
WS-IV
NA
NA
0.75
2.9 j,B
<50
<0.1
0.14
23
<0.01
46.1 j
<0.05
4.15
0.3 j
0.62
0.26 j
135
<0.09
NA
1.56
132
0.00589
<0.11
<0.44
NA
SW-SC-02 (3)
Active Ash Basin
WS-IV
NA
NA
0.77 B
<2.5
<50
<0.1
0.17
22.1
<0.01
29.7 j
<0.05
3.64
0.25 j
0.45
0.22 j
104
<0.09
NA
1.52
104
0.00126
<0.11
<0.44
NA
SW-SC-02 (4)
Active Ash Basin
WS-IV
NA
NA
0.73 B
<2.5
<50
<0.1
0.14
23.1
<0.01
52.2
<0.05
4.41
0.24 j
0.61
0.25 j
75
<0.09
NA
1.56
140
0.000826
<0.11
<0.44
NA
SW-SC-03 (1)
Active Ash Basin
WS-IV
NA
NA
0.82
3.3 j,B
<50
<0.1
0.13
21.6
<0.01
29.3 j
<0.05
3.46
0.16 j
0.36
0.28 j
58.7
<0.09
NA
1.52
80.8
0.00359 B
<0.11
<0.44
NA
Page 8 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
SPECIATIONS
Potassium
(0.45u)
Selenium
(0.45u)
Silver
(0.45u)
Sodium
(0.45u)
Strontium
(0.45u)
Thallium
(0.45u)
Vanadium
(0.45u)
Zinc
(0.45u)
Radium-226
Radium-226
Arsenic (Speciation)
As(III)III)
As(V)
Cr(III)
Cr(VI)
DIS
Cr(VI)
Iron (Speciation)
Fe(II)
Fe(III)
Manganese
(Speciation)
DIS
Manganese
(Speciation)
Mn(II)
Mn(IV)
Se(IV)
Se(VI)
Reporting Units
mg/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
pCi/L
pCi/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
NE
36
NE
NE
NE
NE
NE
24
11
11
NE
NE
NE
NE
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-04
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
20.7
<0.1
0.23 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
18.6
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
19.5
<0.1
0.3 j,B
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
0.39 j
NA
NA
91
<0.1
0.31
<10
NA
NA
NA
NA
NA
NA
NA
0.072
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
0.39 j
NA
NA
114
0.021 j
0.5
2.6 j
NA
NA
NA
NA
NA
NA
NA
0.028 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
24
<0.1
0.35
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
0.37 j
NA
NA
143
<0.1
0.3
<10
NA
NA
NA
NA
NA
NA
NA
0.073 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
111
<0.1
0.23 j
<10
NA
NA
NA
NA
NA
NA
NA
0.08 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
96.5
0.03 j
<0.3
13.8
NA
NA
NA
NA
NA
NA
NA
0.073 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
108
0.016 j
1.5
2.8 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
80.5
<0.1
0.54
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
SOS
<0.1
0.46
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
90.7
<0.1
0.24 j,B
10.5 B
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (1)
Active Ash Basin
WS-IV
2.7 j
<0.31
<0.07
4.91 j
160
<0.015
0.32
5.3 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
5.03
107
<0.015
0.2 j
5.5 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
4.83 j
69.8
<0.015
1 0.37 B
7.6 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
4.61 j
60.8
<0.015
0.37 B
4.3 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01
Active Ash Basin
WS-IV
1.45
<1
<1
4.08
44
0.177 j
0.372
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (1)
Active Ash Basin
WS-IV
3.55 j
3.7
<0.07
8.94
270
0.6
2.6
11.2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (2)
Active Ash Basin
WS-IV
3.6 j
3.8
<0.07
8.9
274
0.61
2.7
12
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (3)
Active Ash Basin
WS-IV
2.98 j
3.1
<0.07
8.07
198
0.5
2.4
9.7 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (4)
Active Ash Basin
WS-IV
3 j
2.7
<0.07
8
197
0.48
2.1
9.3 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02
Active Ash Basin
WS-IV
1.75
<1
<1
4.91
131
0. 141 j
1.1
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (1)
Active Ash Basin
WS-IV
3.17 j
3.1
<0.07
1 7.48
231
0.56
2.2
10.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (2)
Active Ash Basin
WS-IV
3.17 j
3.4
<0.07
8.19
233
0.55
2.2
11.4
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (3)
Active Ash Basin
WS-IV
2.73 j
2.4
<0.07
7.51
174
0.45
2
7.2 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (4)
Active Ash Basin
WS-IV
2.68 j
2.4
0.089 j
7.48
1 169
0.43
1.8 B
7 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03
Active Ash Basin
WS-IV
1.77
<1
<1
5.03
128
0.105 j
1.05
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRBG (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
4.29 j
25.2
<0.015
0.44 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRBG (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.76 j
25.2
<0.015
0.46 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRBG (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.39 j
23.1
<0.015
0.32 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRBG (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.41 j
23.6
<0.015
0.32 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SBRBG (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
4.79 j
28.6
<0.015
0.46 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SBRBG (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
4.83 j
28.2
<0.015
0.45 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SBRBG (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
5.63
28.8
<0.015
0.46 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SBRBG (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
5.67
29.1
<0.015
0.5 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-01 (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
2.84 j
18
0.047 j
0.3 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-01 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
1 3.32 j
18.4
<0.015
0.3 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-01 (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.37 j
19
<0.015
0.19 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-01 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.39 j
18.4
<0.015
0.24 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-02 (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.56 j
24.6
<0.015
0.24 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-02 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.61 j
24.7
<0.015
0.33 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-02 (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.51 j
22.6
<0.015
0.19 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-02 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.68 j
26
<0.015
0.21 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-03 (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
2.95 j
23
<0.015
0.27 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Page 9 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
OTHER PARAMETERS
BOD
Bromide
Carbonate Alkalinity
COD
Fluoride
Hardness
Nitrate
Nitrogen, Kjeldahl, total
Oil and grease
Phosphate
Phosphorus
Reporting Units
mg/L
ug/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
1.8
100
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Source Water
Classification
Analytical Results
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-04
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
0.091
SW-08
Active Ash Basin
WS-IV
NA
NA
<5
NA
0.076 j
NA
NA
NA
NA
NA
<0.05
SW-BRAB-01 (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
0.059 j
74
NA
NA
NA
NA
NA
SW-BRAB-01 (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
0.053 j
57.3
NA
NA
NA
NA
NA
SW-BRAB-01 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01 (3)
Active Ash Basin
WS-IV
NA
NA
<2
NA
<0.05
29.9
NA
NA
NA
NA
NA
SW-BRAB-01 (4)
Active Ash Basin
WS-IV
NA
NA
<2
NA
<0.05
30.6
NA
NA
NA
NA
NA
SW-BRAB-01
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-01
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-BRAB-02 (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
0.11
115
NA
NA
NA
NA
NA
SW-BRAB-02 (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
0.11
121
NA
NA
NA
NA
NA
SW-BRAB-02 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02 (3)
Active Ash Basin
WS-IV
NA
NA
<2
NA
0.086 j
91.5
NA
NA
NA
NA
NA
SW-BRAB-02 (4)
Active Ash Basin
WS-IV
NA
NA
<2
NA
0.086 j
93.2
NA
NA
NA
NA
NA
SW-BRAB-02
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-02
Active Ash Basin
WS-IV
NA
NA
<5
NA
0.051 j
NA
NA
NA
NA
NA
<0.05
SW-BRAB-03 (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
0.1
108
NA
NA
NA
NA
NA
SW-BRAB-03 (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
0.093 j
102
NA
NA
NA
NA
NA
SW-BRAB-03 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03 (3)
Active Ash Basin
WS-IV
NA
NA
<2
NA
0.077 j
77
NA
NA
NA
NA
NA
SW-BRAB-03 (4)
Active Ash Basin
WS-IV
NA
NA
<2
NA
0.078 j
83.5
NA
NA
NA
NA
NA
SW-BRAB-03
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRAB-03
Active Ash Basin
WS-IV
NA
NA
<5
NA
0.047 j
NA
NA
NA
NA
NA
<0.05
SW-BRBG (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
15.1
NA
NA
NA
NA
NA
SW-BRBG (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
15
NA
NA
NA
NA
NA
SW-BRBG (3)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
12.8
NA
NA
NA
NA
NA
SW-BRBG (4)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
12.2
NA
NA
NA
NA
NA
SW-SBRBG (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
18.4
NA
NA
NA
NA
NA
SW-SBRBG (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
18.5
NA
NA
NA
NA
NA
SW-SBRBG (3)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
18.2
NA
NA
NA
NA
NA
SW-SBRBG (4)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
18.8
NA
NA
NA
NA
NA
SW-SC-01 (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
12.2
NA
NA
NA
NA
NA
SW-SC-01 (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
12.8
NA
NA
NA
NA
NA
SW-SC-01 (3)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
12.2
NA
NA
NA
NA
NA
SW-SC-01 (4)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
12.5
NA
NA
NA
NA
NA
SW-SC-02 (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
13.8
NA
NA
NA
NA
NA
SW-SC-02 (2)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
16
NA
NA
NA
NA
NA
SW-SC-02 (3)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
15.5
NA
NA
NA
NA
NA
SW-SC-02 (4)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
15.3
NA
NA
NA
NA
NA
SW-SC-03 (1)
Active Ash Basin
WS-IV
NA
NA
<1
NA
<0.05
14.9
NA
NA
NA
NA
NA
Page 10 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
yt
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
pH
Temperature
Specific
Conductance
Dissolved
Oxygen
Oxidation
Reduction
Potential
Eh
Turbidity
Flow
Alkalinity
Bicarbonate
Alkalinity
Methane
Sulfide
Total
Organic
Carbon
Total
Suspended
Solids
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Reporting Units
S.U.
Deg C
umhos/cm
mg/L
mV
mV
NTUs
GPM
mg/L
mg/L
ug/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
mg/L
mg/L
15A NCAC 02B (Class C, WS-IV)
6.0-9.0
32
NE
4
NE
NE
25
NE
NE
NE
NE
NE
NE
NE
NE
NE
250
NE
250
500
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
5.2-64.2
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-SC-03 (2)
Active Ash Basin
WS-IV
7.2
6
58
10.89
173
378
9.7
NM
8
8
<10 N2
<0.1
1.2
<2.6
31.4 j
3.76
5.3
25.8
3.8
55
SW-SC-03 (3)
Active Ash Basin
WS-IV
7.0
9
53
8.91
-263
-58
10.6
NM
9.3
9.3
<10 N2
<0.1
1.1
2.6
27 j
3.21
5.2
23.4
3.6
29
SW-SC-03 (4)
Active Ash Basin
WS-IV
6.9
9
54
9.13
-253
-48
10.4
NM
9.3
9.3
<10 N2
<0.1
1.1
2.8
33.7 j
3.34
5.3
24.3
3.7
<25
SW-SC-04 (1)
Active Ash Basin
WS-IV
7.1
7
57
10.52
123
328
5.7
NM
9.1
9.1
<10 N2
NA
1.5
<2.5
<25
3.51
5
22.6
4.5
54
SW-SC-04 (2)
Active Ash Basin
WS-IV
7.1
7
54
10.50
121
326
5.5
NM
9.3
9.3
<10 N2
NA
1.3
<2.5
<25
3.52
5
23.1
4.4
57
SW-SC-04 (Sulfide Only 1)
Active Ash Basin
WS-IV
6.9
8
57
16.28 S
-247
-42
NM
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (Sulfide Only 2)
Active Ash Basin
WS-IV
6.9
8
56
15.77 S
-248
-43
NM
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (3)
Active Ash Basin
WS-IV
6.8
8
55
10.66
-278
-73
6.5
NM
9.6
9.6
<10 N2
<0.1
1
<2.5
<25
3.47
5
22.2
4.4
54
SW-SC-04 (4)
Active Ash Basin
WS-IV
6.8
8
54
10.84
-238
-33
7.1
NM
9.8
9.8
<10 N2
<0.1
1.1
<2.5
<25
3.32
4.9
22.4
4.1
49
SW-SC-05 (1)
Active Ash Basin
WS-IV
6.3 S
8
81
12.51 S
120
325
8.7
NM
10.4
10.4
<10 N2
NA
1.4
<2.7
30.1 j
4.95
5.5
30.1
7.6
58
SW-SC-05 (2)
Active Ash Basin
WS-IV
6.3 S
8
81
12.51 S
120
325
8.7
NM
10
10
<10 N2
NA
1.3
<2.6
26 j
4.92
5.5
27.7
7.4
64
SW-SC-05 (Sulfide Only 1)
Active Ash Basin
WS-IV
6.9
9
74
14.63 S
-258
-53
NM
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (Sulfide Only 2)
Active Ash Basin
WS-IV
6.9
9
73
14.55 S
-256
-51
NM
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (3)
Active Ash Basin
WS-IV
6.6
8
69
9.77
-231
-26
5.9
NM
9.7
9.7
<10 N2
<0.1
1.1
<2.5
29.4 j
4.91
5.4
27.5
6.5
32
SW-SC-05 (4)
Active Ash Basin
WS-IV
6.7
8
70
9.57
-242
-37
5.8
NM
11
11
<10 N2
<0.1
1.1
<2.5
29.4 j
4.76
5.5
29.6
7.1
28
SW-SC-06 (1)
Active Ash Basin
WS-IV
6.2 S
6
61
12.92 S
134
339
6.8
NM
9.3
9.3
<10 N2
NA
1.3
<2.6
26.2 j
4
5.1
26.6
6
54
SW-SC-06 (2)
Active Ash Basin
WS-IV
6.2 5
6
61
12.92 S
134
339
6.8
NM
9.2
9.2
<10 N2
NA
1.2
<2.5
26.1 j
4.06
5
27
6
49
SW-SC-06 (Sulfide Only 1)
Active Ash Basin
WS-IV
7.1
8
62
15.91 S
-299
-94
NM
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (Sulfide Only 2)
Active Ash Basin
WS-IV
7.1
8
62
16.1 S
-295
-90
NM
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (3)
Active Ash Basin
WS-IV
6.9
7
62
9.52
-218
-13
6.4
NM
9.5
9.5
<10 N2
<0.1
1
<2.5
29 j
4.04
5.1
27.4
6.1
66
SW-SC-06 (4)
Active Ash Basin
WS-IV
6.9
7
62
8.83
-214
-9
6.6
NM
8.6
8.6
<10 N2
<0.1
1.3
<2.5
31.6 j
4.32
5.1
30.3
6.8
35 D6
SW-SC-06A
Active Ash Basin
WS-IV
7.3
22
60
6.59
86
291
9.4
NM
6.23
6.23
<10
<0.1
1.5 B2
6.2
20.656 j
3.08
4.8
23
3
55
SW-SC-06A
Active Ash Basin
WS-IV
7.6
20
56
7.80
86
291
8.7
NM
6.34
6.34
<10
<0.1
1.5
<2.5
17.936 j
3.06
4.6
23
3
26
SW-SC-06A (2)
Active Ash Basin
WS-IV
7.3
20
50
7.98
85
290
8.6
NM
5.75
5.75
<10
<0.1
1.5
<2.5
17.007 j
2.95
4.5
22
2.8
29
SW-SC-06A
Active Ash Basin
WS-IV
7.0
23
55
5.25
143
348
10.1
NM
11.1
11.1
<10
<0.1
1.4
<2.5
21.204 j
3.14
4.6
23
3
41
SW-SC-06A
Active Ash Basin
WS-IV
7.2
21
53
7.00
136
341
11.1
NM
11
11
<10
<0.1
1.5
<2.5
18.808 j
3.05
4.5
23
3
47
SW-SC-07 (1)
Active Ash Basin
WS-IV
7.2
7
57
11.61
174
379
11.6
NM
9.1
9.1
<10 N2
NA
1.2
3.9
<25
3.61
5
24.6
4.8
53
SW-SC-07 (2)
Active Ash Basin
WS-IV
7.0
7
73
11.30
181
386
11.3
NM
9.1
9.1
<10 N2
NA
1.2
4.4
<25
3.61
5
24.8
4.8
49
SW-SC-07 (Sulfide Only 1)
Active Ash Basin
WS-IV
7.4
8
57
15.88 S
-272
-67
8.7
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (Sulfide Only 2)
Active Ash Basin
WS-IV
7.4
8
57
15.5 S
-273
-68
7.8
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (3)
Active Ash Basin
WS-IV
6.9
8
56
9.64
190
395
8.1
NM
19.8
19.8
<10 N2
<0.1
1.1
3.4
<25
3.53
4.9
25.4
4.5
75
SW-SC-07 (4)
Active Ash Basin
WS-IV
6.9
8
56
9.63
195
400
8.1
NM
39.5
39.5
<10 N2
<0.1
1.1
<2.8
<25
3.55
5
24.8
4.5
71
SBR 3 475.8
Former Units 1-4 basin
WS-IV
7.2
25
81
6.91
161
366
28.4
NM
NA
NA
NA
NA
NA
14
<50
4.4 B2
3.8
NA
2.6
39
SBR 3 475.8
Former Units 1-4 basin
WS-IV
6.9
24
72
7.91
135
340
18.5
NM
NA
NA
NA
NA
NA
NA
<50
5.04
3.8
NA
1.9
48
SBR 3 475.8
Former Units 1-4 basin
WS-IV
7.4
19
61
8.71
101
306
37.2
NM
NA
NA
NA
NA
NA
NA
<50
4.38
3.1
NA
2.5
38
SBR 3 475.8
Former Units 1-4 basin
WS-IV
7.8
8
57
7.36
237
442
29.5
NM
NA
NA
NA
NA
NA
29
<50
3.59
3
NA
2.8
56
SBR 3 475.8
Former Units 1-4 basin
WS-IV
7.1
22
59
8.16
242
447
16.1
NM
NA
NA
NA
NA
NA
NA
<50
4.03
3.2
NA
1.9
39
SW-BRU14-01 (1)
Former Units 1-4 basin
WS-IV
7.2
6
50
11.97
171
376
6.5
NM
15.5
15.5
<10 N2
NA
0.65 j
<2.8
<25
3.86
2.6
30.1
2.8
106
SW-BRU14-01 (2)
Former Units 1-4 basin
WS-IV
7.2
6
50
11.52
170
375
6.2
NM
15.4
15.4
<10 N2
NA
0.61 j
<2.9
<25
3.86
2.6
31.5
3.1
54
SW-BRU14-01 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
7.3
6
51
11.48
192
397
6.7
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
7.3
6
50
11.42
191
396
7.8
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (3)
Former Units 1-4 basin
WS-IV
7.0
7
47
11.70
204
409
10.7
NM
59.3
59.3
<10 N2
<0.1
1.2
4.1
<25
3.21
2.8
25.4
2.2
74
SW-BRU14-01 (4)
Former Units 1-4 basin
WS-IV
7.2
7
47
11.70
205
410
9.6
NM
14
14
<10 N2
<0.1
0.9 j
5
<25
3.19
2.8
26.6
2.2
63
SW-BRU14-02 (1)
Former Units 1-4 basin
WS-IV
7.0
6
51
11.51
169
374
6.9
NM
15.5
15.5
<10 N2
NA
0.58 j
<2.9
<25
3.72
2.5
28
2.6
56
SW-BRU14-02 (2)
Former Units 1-4 basin
WS-IV
7.2
6
51
11.14
175
380
6.6
NM
15.8
15.8
<10 N2
NA
0.59 j
<2.8
<25
3.76
2.6
29.2
2.5
44
SW-BRU14-02 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
7.3
7
56
10.95
184
389
6.9
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
7.3
7
55
10.62
185
390
7.5
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (3)
Former Units 1-4 basin
WS-IV
7.1
7
48
10.70
203
408
11.9
NM
12.9
12.9
<10 N2
<0.1
0.8 j
4.7
<25
3.24
2.8
27.6
2.3
77
SW-BRU14-02 (4)
Former Units 1-4 basin
WS-IV
7.1
7
48
10.60
203
408
10.1
NM
13
13
<10 N2
<0.1
0.84 j
5
<25
3.25
2.8
28.4
2.2
73
SW-BRU14-03 (1)
Former Units 1-4 basin
WS-IV
6.6
5
51
11.93
202
407
6.3
NM
15.2
15.2
<10 N2
<0.1
0.61 j
<2.5
<25
3.93
2.5
28.4
2.4
57
SW-BRU14-03 (2)
Former Units 1-4 basin
WS-IV
7.0
5
51
11.00
191
396
6.2
NM
14.9
14.9
<10 N2
NA
0.62 j
<2.7
27.8 j
3.88
2.4
26.9
2.2
38
SW-BRU14-03 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
7.3
7
54
10.98
187
392
6.9
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
7.2
7
54
11.01
187
392
7.8
NM
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (3)
Former Units 1-4 basin
WS-IV
7.1
8
47
11.30
202
407
11.8
NM
12.8
12.8
<10 N2
<0.1
1.1
64.4
<25
3.2
2.8
25.6
2.2
39
Page 11 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
(Nitrate
as N)
Nitrate +
Nitrite
Potassium
Selenium
Silver
Sodium
Thallium
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg-N/L
mg/L
ug/L
ug/L
mg/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
10
1000
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
0.012
NE
25
NE
10
NE
5
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
69.2-1760
<0.1-<5 NE
NE
NE
NE
NE
NE
NE
NE
225-3630
NE
NE
NE
17.6-160
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-SC-03 (2)
Active Ash Basin
WS-IV
201
<0.1
0.23
22
0.019 j
<0.05
0.065 j,D3
0.67
0.45
0.94
1130
0.27
NA
1.53
88.8
0.00112
0.13 j
0.57
NA
0.44
<2.5
<0.31
<0.07
3.06 j
0.023 j
SW-SC-03 (3)
Active Ash Basin
WS-IV
151
<0.1
0.29
21.1
0.02 j
<0.05
0.065 j,D3
0.86
0.4
0.43 j
1020
0.22
NA
1.42
77.8
0.00131
<0.11
0.62
NA
0.43
<2.5
<0.31
<0.07
3.3 j
0.066 j
SW-SC-03 (4)
Active Ash Basin
WS-IV
135
<0.1
0.28
34
0.016 j
<0.05
0.061 j,D3
0.65
0.37
0.42 j
1020
0.2
NA
1.45
82.3
0.00142
<0.11
0.49 j
NA
0.44
<2.5
<0.31
<0.07
2.78 j
0.016 j
SW-SC-04 (1)
Active Ash Basin
WS-IV
187
<0.1
0.23
24.1
0.011 j
<0.05
0.28
0.6
0.39
<0.11
1080
0.21
NA
1.61
71.6
0.000646 B
<0.11
0.47 j
NA
0.44
<2.5
<0.31
<0.07
3.47 j
<0.015
SW-SC-04 (2)
Active Ash Basin
WS-IV
164
<0.1
0.2
24
0.012 j
<0.05
0.27
0.52
0.41
<0.11
1080
0.2
NA
1.6
72.7
0.000679 B
<0.11
0.48 j
NA
0.44
<2.5
<0.31
<0.07
2.94 j
<0.015
SW-SC-04 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (3)
Active Ash Basin
WS-IV
102
<0.1
0.24
21
0.011 j
<0.05
0.062 j,D3
0.58
0.34 B
0.34 j,B
957
0.16
NA
1.59
64.5
0.00112
<0.11
0.46 j
NA
0.44
<2.5
<0.31
<0.07
2.85 j
<0.015
SW-SC-04 (4)
Active Ash Basin
WS-IV
112
<0.1
0.25
30.5
0.028 j
<0.05
<0.041 D3
0.63
0.35
0.33 j
962
0.19
NA
1.54
63.1
0.00107
<0.11
0.47 j
NA
0.45
<2.5
<0.31
<0.07
3.26 j
0.056 j
SW-SC-05 (1)
Active Ash Basin
WS-IV
175
<0.1
0.24
24.5
0.012 j
<0.05
0.29
0.54
0.64
<0.11
1100
0.2
NA
1.8
113
0.000769 B
<0.11
0.48 j
NA
0.44
<2.5
<0.31
<0.07
3.59 j
<0.015
SW-SC-05 (2)
Active Ash Basin
WS-IV
170
<0.1
0.25
24.6
0.017 j
<0.05
0.3
0.56
0.62
<0.11
1070
0.19
NA
1.81
107
0.000722 B
<0.11
0.49 j
NA
0.43
<2.5
<0.31
<0.07
3.58 j
<0.015
SW-SC-05 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (3)
Active Ash Basin
WS-IV
132
<0.1
0.24
22.6
0.013 j
<0.05
0.05 j,D3
0.51
0.61
0.37 j,B
1050
0.18
NA
1.82
95.3
0.0012
<0.11
<0.44
NA
0.43
<2.5
<0.31
<0.07
3.49 j
<0.015
SW-SC-05 (4)
Active Ash Basin
WS-IV
129
<0.1
0.25
60.6
0.011 j
<0.05
<0.041 D3
0.57
0.68
0.37 j,B
1120
0.15
NA
1.8
108
0.00111
<0.11
0.48 j
NA
0.43
<2.5
<0.31
<0.07
3.44 j
<0.015
SW-SC-06 (1)
Active Ash Basin
WS-IV
142
<0.1
0.22
24.8
0.016 j
<0.05
0.31
0.55
0.91
<0.11
1080
0.19
NA
1.67
92.5
0.000607 B
<0.11
0.49 j
NA
0.44
<2.5
<0.31
<0.07
3.42 j
<0.015
SW-SC-06 (2)
Active Ash Basin
WS-IV
150
<0.1
0.22
23.9
0.01 j
<0.05
0.42
0.5
0.87
<0.11
1060
0.18
NA
1.7
91.8
0.000617 B
<0.11
0.51
NA
0.47
<2.5
<0.31
<0.07
3.5 j
<0.015
SW-SC-06 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (3)
Active Ash Basin
WS-IV
121
<0.1
0.23
22.4
0.011 j
<0.05
<0.041 D3
0.9
0.97
0.36 j,B
970
0.16
NA
1.67
91.8
0.00114
<0.11
0.65
NA
0.45
<2.5
<0.31
<0.07
3.33 j
<0.015
SW-SC-06 (4)
Active Ash Basin
WS-IV
141
<0.1
0.26
23.4
0.012 j
<0.05
0.5 P4
0.67
1.5
0.36 j,B
1060
0.19
NA
1.73
116
0.0011
<0.11
0.7
NA
0.44
<2.5
<0.31
<0.07
3.36 j
<0.015
SW-SC-06A
Active Ash Basin
WS-IV
292
<1
<1
24
<1
<0.1
0.1
0.578 j
0.42 j
<1
1160
<1
NA
1.39
49
0.00138
<1
<1
NA
0.721
1.8
<1
<0.3
2.71
<0.2
SW-SC-06A
Active Ash Basin
WS-IV
160
<1
<1
23
<1
<0.1
0.11
0.603 j
0.346 j
0.381 j
1110
<1
NA
1.41
44
0.00173
<1
0.368 j
NA
0.693
1.8
<1
<0.3
2.76
<0.2
SW-SC-06A (2)
Active Ash Basin
WS-IV
167
<1
<1
23
<1
<0.1
0.1
0.542 j
<1
0.386 j
1100
<1
NA
1.37
41
0.000872
<1
0.334 j
NA
0.693
1.76
<1
<0.3
2.7
<0.2
SW-SC-06A
Active Ash Basin
WS-IV
226
<1
<1
24
<1
<0.1
0.094
0.573 j
0.353 j
0.402 j
1160
<1
NA
1.42
48
0.00163
<1
<1
NA
0.712
1.83
<1
<0.3
2.96
<0.2
SW-SC-06A
Active Ash Basin
WS-IV
149
<1
<1
24
<1
<0.1
0.11
0.477 j
0.375 j
0.343 j
1080
<1
NA
1.38
46
0.00185
<1
<1
NA
0.686
1.78
<1
<0.3
2.71
<0.2
SW-SC-07 (1)
Active Ash Basin
WS-IV
156
<0.1
0.23
23.6
<0.01
<0.05
0.45
0.49 j
0.47
<0.11
1080
0.22
NA
1.61
73.3
0.00058 B
<0.11
0.48 j
NA
0.52
<2.5
<0.31
<0.07
3.43 j
<0.015
SW-SC-07 (2)
Active Ash Basin
WS-IV
184
<0.1
0.23
24.1
0.012 j
<0.05
0.89
0.64
0.49
<0.11
1110
0.22
NA
1.62
75.4
6.89E-04 B
<0.11
0.51
NA
0.44
<2.5
<0.31
<0.07
3.48 j
<0.015
SW-SC-07 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (3)
Active Ash Basin
WS-IV
130
<0.1
0.21
25 B
0.01 j
<0.05
0.18
0.56
0.42
0.48 j,B
1020
0.17
NA
1.6
70.2
0.00115
<0.11
0.53
NA
0.44
<2.5
<0.31
<0.07
3.4 j
<0.015
SW-SC-07 (4)
Active Ash Basin
WS-IV
133
<0.1
0.26
23.7 B
0.012 j
<0.05
0.15
0.63
0.48
0.41 j,B
1040
0.2
NA
1.6
71.6
0.00112
<0.11
0.46 j
NA
0.43
<2.5
<0.31
<0.07
2.91 j
<0.015
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
<1
25
NA
<0.1
NA
1.08
NA
<1
NA
0.56
NA
2.03
NA
0.00167
NA
<1
NA
0.6
NA
<1
NA
NA
<0.2 B3
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
<1
25
NA
<0.1
NA
1.23
NA
1.27
NA
0.762
NA
2.18
NA
0.00211
NA
<1
NA
0.289
NA
<1
NA
NA
<0.2
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
<1
30
NA
<0.1
NA
1.84
NA
1.72
NA
0.958
NA
2.07
NA
0.00391
NA
<1
NA
0.34
NA
<1
NA
NA
<0.2
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
<1
25
NA
<0.1
NA
1.28
NA
1.02
NA
0.598
NA
1.76
NA
0.0041
NA
<1
NA
0.39
NA
<1
NA
NA
<0.2 B3
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
<1
25
NA
<0.1
NA
1.03
NA
1.21
NA
0.593
NA
1.82
NA
0.00223
NA
<1
NA
0.42
NA
<1
NA
NA
<0.2 B3
SW-BRU14-01 (1)
Former Units 1-4 basin
WS-IV
192
<0.1
0.14
15.1
<0.01
<0.05
0.076 j,D3
0.36 j
0.27
<0.11
439
0.12
NA
1.38
58.9
8.73E-04 B
<0.11
<0.44
NA
0.26
<2.5
<0.31
<0.07
3.56 j
<0.015
SW-BRU14-01 (2)
Former Units 1-4 basin
WS-IV
173
<0.1
0.17
15.4
0.034 j
<0.05
0.3
0.4 j
0.3
<0.11
438
0.15
NA
1.35
63.4
0.000357 j,B
<0.11
<0.44
NA
0.26
<2.5
<0.31
<0.07
3.52 j
0.031 j
SW-BRU14-01 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (3)
Former Units 1-4 basin
WS-IV
262
<0.1
0.17
14.7 B
0.018 j
<0.05
0.13
0.6
0.3 B
0.6 B
526
0.28
NA
1.2
50.5
0.00109
<0.11
<0.44
NA
0.27
<2.5
<0.31
<0.07
3.34 j
<0.015
SW-BRU14-01 (4)
Former Units 1-4 basin
WS-IV
313
<0.1
0.18
14.9 B
0.016 j
<0.05
0.13
0.64
0.3 B
0.55 B
551
0.29
NA
1.18
49.1
0.00109
<0.11
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.8 j
<0.015
SW-BRU14-02 (1)
Former Units 1-4 basin
WS-IV
165
<0.1
0.31
14.1
<0.01
<0.05
0.12
0.32 j
0.24
0.68
399
0.13
NA
1.36
41.5
0.000308 j,B
<0.11
<0.44
NA
0.27
<2.5
<0.31
<0.07
3.53 j
<0.015
SW-BRU14-02 (2)
Former Units 1-4 basin
WS-IV
133
<0.1
0.34
14.5
<0.01
<0.05
0.027
0.31 j
0.24
<0.11
401
0.12
NA
1.36
44
0.000276 j,B
<0.11
<0.44
NA
0.26
<2.5
<0.31
<0.07
4 j
<0.015
SW-BRU14-02 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (3)
Former Units 1-4 basin
WS-IV
315
<0.1
0.3
13.8
0.029 j
<0.05
0.089 j,D3
0.71
0.31 B
0.58 B
532
0.32
NA
1.19
47.4
0.00112
0.11 j
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.76 j
0.047 j
SW-BRU14-02 (4)
Former Units 1-4 basin
WS-IV
340
<0.1
0.31
16.5
0.025 j
<0.05
0.39
0.7
0.27 B
0.67 B
552
0.28
NA
1.2
46.6
0.00106
1 <0.11
<0.44
NA
0.21
<2.5
<0.31
<0.07
3.73 j
<0.015
SW-BRU14-03 (1)
Former Units 1-4 basin
WS-IV
154
<0.1
0.22
13.4
0.01 j
<0.05
0.12 j,D3
0.41 j
0.2
0.39 j
388
0.15
NA
1.38
42.8
0.000487 j
<0.11
<0.44
NA
0.25
<2.5
<0.31
<0.07
3.99 j
<0.015
SW-BRU14-03 (2)
Former Units 1-4 basin
WS-IV
131
<0.1
0.27
13.1
0.025 j
<0.05
0.11 j,D3
0.46 j
0.2
0.48 j
393
0.16
NA
1.35
40.4
0.000545
<0.11
<0.44
NA
0.29
<2.5
<0.31
<0.07
3.54 j
0.029 j
SW-BRU14-03 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (3)
Former Units 1-4 basin
WS-IV
324
<0.1
0.23
13.7
0.017 j
<0.05
0.06 j,D3
0.62
0.24 B
0.58 B
554
0.27
NA
1.2
45.5
0.00102
<0.11
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.28 j
<0.015
Page 12 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Tin
Titanium
Vanadium
Zinc
Aluminum
(0.45u)
Antimony
(0.45u)
Arsenic
(0.45u)
Barium
(0.45u)
Beryllium
(0.45u)
Boron
(0.45u)
Cadmium
(0.45u)
Calcium
(0.45u)
Chromium
(0.45u)
Cobalt
(0.45u)
Copper
(0.45u)
Iron
(0.45u)
Lead
(0.45u)
Lithium
(0.45u)
Magnesium
(0.45u)
Manganese
(0.45u)
Mercury
(0.45u)
Molybdenum
(0.45u)
Nickel
(0.45u)
Phosphorus
(0.45u)
Reporting Units
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
ISO
NE
6.5
NE
0.15
NE
24
NE
2.7
NE
0.54
NE
NE
NE
NE
NE
16
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE NE
NE
NE
I NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Source Water
Classification
Analytical Results
SW-SC-03 (2)
Active Ash Basin
WS-IV
NA
NA
0.84
2.9 j,B
<50
<0.1
0.16
21.8
<0.01
32.8 j
<0.05
3.6
0.29 j
0.42
0.8
55.4
<0.09
NA
1.53
83.4
0.000821 B
<0.11
0.46 j
NA
SW-SC-03 (3)
Active Ash Basin
WS-IV
NA
NA
0.76 B
<2.5
<50
<0.1
0.16
21.3
0.013 j
27.8 j
<0.05
3.56
0.29 j
0.29
0.24 j
159
<0.09
NA
1.54
75.5
8.64E-04
<0.11
<0.44
NA
SW-SC-03 (4)
Active Ash Basin
WS-IV
NA
NA
0.67 B
2.8 j
<50
<0.1
0.12
20.9
0.013 j
31.9 j
<0.05
3.6
0.24 j
0.31
0.27 j
45.8 j
<0.09
NA
1.52
76.4
8.41E-04
<0.11
<0.44
NA
SW-SC-04 (1)
Active Ash Basin
WS-IV
NA
NA
0.56
<2.5
<50
<0.1
0.12
21.6
<0.01
<25
<0.05
3.52
0.27 j
0.3
<0.11
173
<0.09
NA
1.66
67.8
0.000935
<0.11
<0.44
NA
SW-SC-04 (2)
Active Ash Basin
WS-IV
NA
NA
0.61
<2.5
<50
<0.1
0.1
21.3
<0.01
<25
<0.05
3.57
0.25 j
0.31
<0.11
132
<0.09
NA
1.66
67.8
0.000369 j
<0.11
<0.44
NA
SW-SC-04 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (3)
Active Ash Basin
WS-IV
NA
NA
0.66
<2.5
<50
<0.1
0.11
22
<0.01
<25
<0.05
3.61
0.21 j
0.31
0.24 j
48.8 j
<0.09
NA
1.64
64.1
0.000956
<0.11
<0.44
NA
SW-SC-04 (4)
Active Ash Basin
WS-IV
NA
NA
0.61 B
<2.5
<50
<0.1
0.15
21.7
<0.01
<25
<0.05
3.58
0.2 j
0.28
0.23 j
55
<0.09
NA
1.62
63.1
0.000508
<0.11
0.96
NA
SW-SC-05 (1)
Active Ash Basin
WS-IV
NA
NA
0.63
3.6 j
<50
<0.1
0.12
24.3
<0.01
32.4 j
<0.05
5.37
0.2 j
0.54
0.58
195
<0.09
NA
1.96
106
0.000762
<0.11
<0.44
NA
SW-SC-05 (2)
Active Ash Basin
WS-IV
NA
NA
0.58
<2.5
<50
<0.1
0.1
22.6
<0.01
32.7 j
<0.05
4.97
0.36 j
0.54
<0.11
199
<0.09
NA
1.87
106
8.25E-04
<0.11
<0.44
NA
SW-SC-05 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (3)
Active Ash Basin
WS-IV
NA
NA
0.67
2.9 j
<50
0.14 j
0.15
22.8
<0.01
27.5 j
<0.05
4.94
0.22 j
0.6
0.28 j
102
<0.09
NA
1.85
99.5
0.000537
<0.11
<0.44
NA
SW-SC-05 (4)
Active Ash Basin
WS-IV
NA
NA
0.71
<2.5
<50
0.17 j
0.14
22.9
<0.01
26 j
<0.05
4.86
0.25 j
0.61
0.25 j
85.2
<0.09
NA
1.82
101
0.000522
<0.11
<0.44
NA
SW-SC-06 (1)
Active Ash Basin
WS-IV
NA
NA
0.62
<2.5
<50
<0.1
0.12
22.8
<0.01
<25
<0.05
4.03
0.24 j
0.81
<0.11
103
<0.09
NA
1.67
90.4
0.000858
<0.11
<0.44
NA
SW-SC-06 (2)
Active Ash Basin
WS-IV
NA
NA
0.54
<2.5
<50
<0.1
0.11
22.4
<0.01
26.2 j
<0.05
4.11
0.25 j
0.72
<0.11
127
<0.09
NA
1.75
88.6
0.000748
<0.11
<0.44
NA
SW-SC-06 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (3)
Active Ash Basin
WS-IV
NA
NA
0.69
<2.5
<50
<0.1
0.16
22.1
<0.01
26.4 j
<0.05
4.39
0.78
1.1
0.24 j
122
<0.09
NA
1.77
101
0.000775
<0.11
0.6
NA
SW-SC-06 (4)
Active Ash Basin
WS-IV
NA
NA
0.68
2.5 j
<50
0.12 j
0.16
22.2
<0.01
<25
<0.05
4.3
0.32 j
0.89
0.29 j
49.1 j
<0.09
NA
1.74
93
0.000548
<0.11
<0.44
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
NA
0.688
2.102 j
9.235 j
<1
<1
22
<1
19.147 j
<0.1
NA
<1
<1
<1
72
<1
NA
NA
40
0.000819
<1
<1
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
NA
0.696
<5
18
<1
<1
22
<1
17.869 j
<0.1
NA
<1
<1
<1
188
<1
NA
NA
35
0.000757
<1
<1
NA
SW-SC-06A (2)
Active Ash Basin
WS-IV
NA
NA
0.692
1.904 j
5.285 j
<1
<1
21
<1
18.264 j
<0.1
NA
<1
<1
<1
52
<1
NA
NA
35
0.000765
<1
<1
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
NA
0.677
2.025 j
16
<1
<1
22
<1
22.223 j
<0.1
NA
<1
<1
<1
138
<1
NA
NA
38
0.000639
<1
<1
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
NA
0.588
2.761 j
16
<1
<1
22
<1
19.11 j
<0.1
NA
<1
<1
<1
162
<1
NA
NA
37
0.00066
0. 127 j
<1
NA
SW-SC-07 (1)
Active Ash Basin
WS-IV
NA
NA
0.58
<2.5
60 j
<0.1
0.15
22.2
<0.01
25.9 j
<0.05
3.6
0.36 j
0.39
<0.11
342
<0.09
NA
1.6
69.9
<0.00025
<0.11
0.48 j
NA
SW-SC-07 (2)
Active Ash Basin
WS-IV
NA
NA
0.61
<2.5
124
<0.1
0.21
22.7
<0.01
<25
<0.05
3.63
0.47 j
0.39
<0.11
620
0.1
NA
1.57
70.1
0.000898
<0.11
0.7
NA
SW-SC-07 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (3)
Active Ash Basin
WS-IV
NA
NA
0.62
2.6 j
<50
<0.1
0.18
22
<0.01
<25
<0.05
3.67
0.52
0.35
0.41 j
326
<0.09
NA
1.62
64.7
9.19E-04
<0.11
<0.44
NA
SW-SC-07 (4)
Active Ash Basin
WS-IV
NA
NA
0.77
<2.5
<50
<0.1
0.16
22
<0.01
<25
<0.05
3.68
0.33 j
0.36
0.49 j
310
<0.09
NA
1.62
65
0.00164
<0.11
<0.44
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
1.14
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SBR-3-475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SBR-3-475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
SW-BRU14-01 (1)
Former Units 1-4 basin
WS-IV
NA
NA
0.63
<2.5
72 j
<0.1
0.1
13.2
<0.01
<25
<0.05
3.82
0.45 j
0.24
<0.11
156
<0.09
NA
1.34
50.2
9.25E-04
<0.11
<0.44
NA
SW-BRU14-01 (2)
Former Units 1-4 basin
WS-IV
NA
NA
0.64
<2.5
73.8 j
<0.1
0.1
13.7
0.018 j
<25
<0.05
3.88
0.19 j
0.23
<0.11
169
<0.09
NA
1.36
54.9
0.000638
<0.11
<0.44
NA
SW-BRU14-01 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (3)
Former Units 1-4 basin
WS-IV
NA
NA
1.1
<2.5
100
<0.1
0.14
12
<0.01
<25
<0.05
3.36
0.44 j
0.17
0.47 j
140
<0.09
NA
1.24
29
0.000617
<0.11
<0.44
NA
SW-BRU14-01 (4)
Former Units 1-4 basin
WS-IV
NA
NA
1.1
<2.5
95.4 j
<0.1
0.12
12
<0.01
<25
<0.05
3.35
0.82
0.18
0.5 j
142
<0.09
NA
1.23
30.2
0.00106
<0.11
<0.44
NA
SW-BRU14-02 (1)
Former Units 1-4 basin
WS-IV
NA
NA
0.63
<2.5
54.9 j
<0.1
0.24
12.8
<0.01
<25
<0.05
3.74
0.34 j
0.19
<0.11
142
<0.09
NA
1.32
37.5
0.000487 j
<0.11
<0.44
NA
SW-BRU14-02 (2)
Former Units 1-4 basin
WS-IV
NA
NA
0.62
<2.5
77.2 j
<0.1
0.33
13.2
<0.01
<25
<0.05
3.84
0.3 j
0.21
<0.11
152
<0.09
NA
1.34
40.3
0.000608
0.14 j
<0.44
NA
SW-BRU14-02 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (3)
Former Units 1-4 basin
WS-IV
NA
NA
1.2
3.3 j
<50
<0.1
0.24
11.9
<0.01
<25
<0.05
3.37
0.2 j
0.14
0.32 j
29.9 j
<0.09
NA
1.23
28.4
0.000473 j
<0.11
<0.44
NA
SW-BRU14-02 (4)
Former Units 1-4 basin
WS-IV
NA
NA
1.1
<2.5
<50
<0.1
0.25
11.8
0.014 j
<25
<0.05
3.38
0.32 j
0.15
0.32 j
29.5 j
<0.09
NA
1.24
27.9
6.19E-04
<0.11
<0.44
NA
SW-BRU14-03 (1)
Former Units 1-4 basin
WS-IV
NA
NA
0.91
2.9 j,B
<50
<0.1
0.18
12.4
0.012 j
<25
<0.05
3.74
0.25 j
0.13
0.32 j
43 j
<0.09
NA
1.34
33.4
0.000508 B
<0.11
<0.44
NA
SW-BRU14-03 (2)
Former Units 1-4 basin
WS-IV
NA
NA
0.82 B
8.8 j,B
<50
<0.1
0.18
12.2
0.014 j
<25
<0.05
3.71
0.24 j
0.14
0.3 j
45 j
<0.09
NA
1.34
32.6
6.28E-04 B
<0.11
<0.44
NA
SW-BRU14-03 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (3)
Former Units 1-4 basin
WS-IV
NA
NA
1.1
<2.5
<50
<0.1
0.17
11.9
<0.01
<25
<0.05
3.33
0.19 j
0.14
0.6
27.5 j
<0.09
NA
1.22
28.3
0.000538
<0.11
<0.44
NA
Page 13 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
SPECIATIONS
Potassium
(0.45u)
Selenium
(0.45u)
Silver
(0.45u)
Sodium
(0.45u)
Strontium
(0.45u)
Thallium
(0.45u)
Vanadium
(0.45u)
Zinc
(0.45u)
Radium-226
Radium-226
Arsenic (Speciation)
As(III)III)
As(V)
Cr(III)
Cr(VI)
DIS
Cr(VI)
Iron (Speciation)
Fe(II)
Fe(III)
Manganese
(Speciation)
DIS
Manganese
(Speciation)
Mn(II)
Mn(IV)
Se(IV)
Se(VI)
Reporting Units
mg/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
pCi/L
pCi/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
NE
36
NE
NE
NE
NE
NE
24
11
11
NE
NE
NE
NE
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-SC-03 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.46 j
23.1
<0.015
0.35 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-03 (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.58 j
23.2
0.041 j
0.23 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-03 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.01 j
23.3
0.058 j
0.18 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.5 j
21.8
<0.015
0.13 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.51 j
22.4
<0.015
<0.07
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.04 j
22.5
<0.015
0.2 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.47 j
23.1
<0.015
0.34 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.65 j
30
<0.015
0.14 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.63 j
28.5
<0.015
0.15 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (3)
Active Ash Basin
WS-IV
<2.5
0.33 j
<0.07
3.64 j
27.6
<0.015
0.22 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.64 j
28.1
<0.015
0.22 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.32 j
26.8
<0.015
0.13 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.52 j
26.4
<0.015
0.13 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.54 j
27.3
<0.015
0.24 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.53 j
27.3
<0.015
0.19 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
<1
<0.3
NA
23
<0.2
0.133 j
1.824 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
<1
<0.3
NA
22
<0.2
0. 142 j
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06A (2)
Active Ash Basin
WS-IV
NA
<1
<0.3
NA
22
<0.2
<0.3
1.683 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
<1
<0.3
NA
22
<0.2
0. 121 j
2.153 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
WS-IV
NA
<1
<0.3
NA
22
<0.2
0. 144 j
2.348 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (1)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.79 j
24.2
<0.015
0.2 j
5 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (2)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.68 j
24.1
<0.015
0.43
4.5 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (Sulfide Only 1)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (3)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
3.81 j
23.7
<0.015
0.3 j,B
4.1 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (4)
Active Ash Basin
WS-IV
<2.5
<0.31
<0.07
2.96 j
23.5
<0.015
0.36 B
4.3 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5 B1
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (1)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.37 j
28.2
<0.015
0.41
4.8 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (2)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.41 j
29.2
<0.015
0.4
4.2 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (3)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
4.17 j
23.9
<0.015
0.48 B
3.9 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (4)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
4.18 j
24
<0.015
0.49 B
2.8 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (1)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.38 j
28.2
<0.015
0.39
4.1 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (2)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
4.16 j
30.4
<0.015
0.36
4 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (3)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.68 j
26.3
<0.015
0.34 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (4)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.93 j
25.3
0.026 j
0.4 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (1)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
4.03 j
26.1
0.04 j
0.34 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (2)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.48 j
25.4
0.046 j
0.16 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (3)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.92 j
24.8
<0.015
0.35 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Page 14 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
OTHER PARAMETERS
BOD
Bromide
Carbonate Alkalinity
COD
Fluoride
Hardness
Nitrate
Nitrogen, Kjeldahl, total
Oil and grease
Phosphate
Phosphorus
Reporting Units
mg/L
ug/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
1.8
100
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-SC-03 (2)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
14.8
NA
NA
NA
NA
NA
SW-SC-03 (3)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
14.1
NA
NA
NA
NA
NA
SW-SC-03 (4)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
14.9
NA
NA
NA
NA
NA
SW-SC-04 (1)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
15.7
NA
NA
NA
NA
NA
SW-SC-04 (2)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
16
NA
NA
NA
NA
NA
SW-SC-04 (Sulfide Only 1)
Active Ash Basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (Sulfide Only 2)
Active Ash Basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-04 (3)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
14.2
NA
NA
NA
NA
NA
SW-SC-04 (4)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
14.2
NA
NA
NA
NA
NA
SW-SC-05 (1)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
19.7
NA
NA
NA
NA
NA
SW-SC-05 (2)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
19.6
NA
NA
NA
NA
NA
SW-SC-05 (Sulfide Only 1)
Active Ash Basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (Sulfide Only 2)
Active Ash Basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-05 (3)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
19
NA
NA
NA
NA
NA
SW-SC-05 (4)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
20
NA
NA
NA
NA
NA
SW-SC-06 (1)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
17.3
NA
NA
NA
NA
NA
SW-SC-06 (2)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
17.1
NA
NA
NA
NA
NA
SW-SC-06 (Sulfide Only 1)
Active Ash Basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (Sulfide Only 2)
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-06 (3)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
16.7
NA
NA
NA
NA
NA
SW-SC-06 (4)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
18.6
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
Ws -IV
NA
NA
<5
NA
<0.1
13.4
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
Ws -IV
NA
NA
<5
NA
<0.1
13.4
NA
NA
NA
NA
NA
SW-SC-06A (2)
Active Ash Basin
Ws -IV
NA
NA
<5
NA
<0.1
13
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
Ws -IV
NA
NA
<5
NA
<0.1
13.7
NA
NA
NA
NA
NA
SW-SC-06A
Active Ash Basin
Ws -IV
NA
NA
<5
NA
<0.1
13.3
NA
NA
NA
NA
NA
SW-SC-07 (1)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
15.8
NA
NA
NA
NA
NA
SW-SC-07 (2)
Active Ash Basin
Ws -IV
NA
NA
<1
NA
<0.05
16
NA
NA
NA
NA
NA
SW-SC-07 (Sulfide Only 1)
Active Ash Basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (Sulfide Only 2)
Active Ash Basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-SC-07 (3)
Active Ash Basin
Ws -IV
NA
NA
<2
NA
<0.05
16
NA
NA
NA
NA
NA
SW-SC-07 (4)
Active Ash Basin
Ws -IV
NA
NA
<2
NA
<0.05
15.8
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
Ws -IV
NA
<100
NA
NA
<0.1
19.3
NA
NA
<5
NA
NA
SBR 3 475.8
Former Units 1-4 basin
Ws -IV
NA
<100
NA
NA
<0.1
21.6
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
Ws -IV
NA
<100
NA
NA
<0.1
19.4
NA
NA
NA
NA
NA
SBR-3 475.8
Former Units 1-4 basin
Ws -IV
NA
<100
NA
NA
<0.1
16.2
NA
NA
NA
NA
NA
SBR 3 475.8
Former Units 1-4 basin
Ws -IV
NA
<100
NA
NA
<0.1
17.6
NA
NA
NA
NA
NA
SW-BRU14-01 (1)
Former Units 1-4 basin
Ws -IV
NA
NA
<1
NA
<0.05
15.8
NA
NA
NA
NA
NA
SW-BRU14-01 (2)
Former Units 1-4 basin
Ws -IV
NA
NA
<1
NA
<0.05
16.2
NA
NA
NA
NA
NA
SW-BRU14-01 (Sulfide Only 1)
Former Units 1-4 basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-01 (3)
Former Units 1-4 basin
WS-IV
NA
NA
<2
NA
<0.05
13.2
NA
NA
NA
NA
NA
SW-BRU14-01 (4)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
13.6
NA
NA
NA
NA
NA
SW-BRU14-02 (1)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
14.8
NA
NA
NA
NA
NA
SW-BRU14-02 (2)
Former Units 1-4 basin
Ws -IV
NA
NA
<1
NA
<0.05
15.4
NA
NA
NA
NA
NA
SW-BRU14-02 (Sulfide Only 1)
Former Units 1-4 basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (Sulfide Only 2)
Former Units 1-4 basin
Ws -IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-02 (3)
Former Units 1-4 basin
Ws -IV
NA
NA
<1
NA
<0.05
13
NA
NA
NA
NA
NA
SW-BRU14-02 (4)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
12.9
NA
NA
NA
NA
NA
SW-BRU14-03 (1)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
14.6
NA
NA
NA
NA
NA
SW-BRU14-03 (2)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
14.1
NA
NA
NA
NA
NA
SW-BRU14-03 (Sulfide Only 1)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (Sulfide Only 2)
Former Units 1-4 basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (3)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
12.9
NA
NA
NA
NA
NA
Page 15 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
yt
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
pH
Temperature
Specific
Conductance
Dissolved
Oxygen
Oxidation
Reduction
Potential
Eh
Turbidity
Flow
Alkalinity
Bicarbonate
Alkalinity
Methane
Sulfide
Total
Organic
Carbon
Total
Suspended
Solids
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Reporting Units
S.U.
Deg C
umhos/cm
mg/L
mV
mV
NTUs
GPM
mg/L
mg/L
ug/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
mg/L
mg/L
15A NCAC 02B (Class C, WS-IV)
6.0-9.0
32
NE
4
NE
NE
25
NE
NE
NE
NE
NE
NE
NE
NE
NE
250
NE
250
500
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
5.2-64.2
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BRU14-03 (4)
Former Units 1-4 basin
WS-IV
7.1
8
47
11.30
202
407
12.5
NM
12.4
12.4
<10 N2
<0.1
0.93 j
5
<25
3.2
2.8
26
2.3
45
SW-BRU5-01 (1)
Former Units 1-4 basin
WS-IV
6.4
5
50
10.83
184
389
6.1
NM
14.4
14.4
<10 N2
<0.1
0.69 j
4.1
<25
3.75
2.3
26.7
2
52
SW-BRU5-01 (2)
Former Units 1-4 basin
WS-IV
6.3
5
50
10.68
186
391
7.4
NM
15.9
15.9
<10 N2
<0.1
0.61 j
6.5
<25
3.85
2.3
25.7
2.1
54
SW-BRU5-01 (3)
Former Units 1-4 basin
WS-IV
7.2
8
50
9.54
-222
-17
9.4
NM
13.4
13.4
<10 N2
<0.1
1
4.5
<25
3.09
2.6
24.6
2
30
SW-BRU5-01 (4)
Former Units 1-4 basin
WS-IV
7.1
8
51
8.87
-213
-8
9.5
NM
14
14
<10 N2
<0.1
0.95 j
4.6
<25
3.06
2.6
23.6
2.1
<25
A 2 UP
Unit 5 Inactive Basin
WS-IV
7.1
19
71
7.26
169
374
13.6
NM
NA
NA
NA
NA
NA
11
<50
3.1
2
NA
1.9
36
A 2 UP
Unit 5 Inactive Basin
WS-IV
6.7
26
43
7.79
182
387
15.9
NM
NA
NA
NA
NA
NA
NA
<50
3.14
1.8
NA
1.4
34
A 2 UP
Unit 5 Inactive Basin
WS-IV
7.1
20
43
7.28
138
343
30.8
NM
NA
NA
NA
NA
NA
NA
<50
3.01
2
NA
2.5
28
A 2 UP
Unit 5 Inactive Basin
WS-IV
7.5
10
42
5.15
322
527
17.7
NM
NA
NA
NA
NA
NA
10
<50
2.54
1.7
NA
2
68
A 2 UP
Unit 5 Inactive Basin
WS-IV
7.3
26
51
6.73
250
455
15.3
NM
NA
NA
NA
NA
NA
NA
<50
3.03
2.6
NA
2.6
31
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
NA
NA
NA
NA
NA
NA
8.22 j
NA
4.3E-03 j
NA
3.8 j
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.8
23
43
NM
NM
NM
13.5
NM
14.7
NA
NA
NA
NA
NA
<50
2.75
<5
NA
<5
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.7
21
45
NM
NM
NM
9.7
NM
NA
NA
NA
NA
NA
NA
6.3 j
NA
3.6
NA
<5
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.5
16
41
NM
NM
NM
9.3
NM
9.851
NA
NA
NA
NA
NA
<50
2.38
4.018
NA
3.177
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.6
12
45
NM
NM
NM
6.5
NM
14.55
NA
NA
NA
NA
NA
<50
2.788
3.998
NA
1.835
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.8
17
42
NM
NM
NM
24.4
NM
13.72
NA
NA
NA
NA
NA
<50
2.699
3.802
NA
2.61
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
7.0
15
44
NM
NM
NM
12.0
NM
13.4
NA
NA
NA
NA
NA
<50
2.68
3.83
NA
1.31
40
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.5
12
40
10.03
317
522
9.7
NM
10
NA
NA
NA
NA
NA
<50
2.36
3.33
NA
2.33
47
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.6
14
41
9.43
350
555
10.7
NM
11
NA
NA
NA
NA
NA
<50
2.48
3.58
NA
1.2
47
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.4
12
37
9.83
395
600
9.6
NM
<20
NA
NA
NA
NA
NA
7.05 j
2.12
3.33
NA
2.11
35
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.5
13
42
9.55
349
554
7.8
NM
11.2
NA
NA
NA
NA
NA
<50
2.63
3.6
NA
1.13
40
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.6
12
41
9.71
343
548
5.0
NM
8.12
NA
NA
NA
NA
NA
6.4 j
2.13
3.41
NA
1.7
30
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.7
13
46
8.66
346
551
5.7
NM
10.9
NA
NA
NA
NA
NA
6.34 j
2.59
3.91
NA
1.45
43
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.5
11
36
11.25
307
512
7.3
NM
7.71
NA
NA
NA
NA
NA
6.43 j
2.13
3.4
NA
1.87
37
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.6
12
43
9.72
340
545
6.4
NM
10.6
NA
NA
NA
NA
NA
9.45 j
2.68
4.09
NA
1.09
40
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.6
16
42
8.60
442
647
13.8
NM
8.16
NA
NA
NA
NA
NA
7.98 j
2.49
3.92
NA
2.99
47
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.3
20
54
7.00
132
337
7.0
NM
5.2
NA
NA
NA
NA
NA
<50
2.83
4
NA
1.4
39
CCPSW-01
Unit 5 Inactive Basin
WS-IV
7.4
22
112
7.75
337
542
114.0
NM
9.21
NA
NA
NA
NA
NA
16.2 j
2.52
2.75
NA
3.27
40
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.6
17
60
8.86
288
493
12.1
NM
10.1
NA
NA
NA
NA
NA
<50
2.5
3.87
NA
1.89
36
CCPSW-01
Unit 5 Inactive Basin
WS-IV
6.6
16
51
7.00
54
259
8.8
NM
8.67
NA
NA
NA
NA
NA
<50
2.19
3.33
NA
1.95
44
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
NA
NA
NA
NA
NA
NA
7.33 j
NA
0.0044 j
NA
3.7 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.7
23
41
NM
NM
NM
17.2
NM
13.7
NA
NA
NA
NA
NA
<50
2.62
<5
NA
<5
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.6
21
41
NM
NM
NM
15.0
NM
NA
NA
NA
NA
NA
NA
6.4 j
NA
3.9
NA
<5
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.5
16
43
NM
NM
NM
9.1
NM
9.977
NA
NA
NA
NA
NA
<50
2.44
4.112
NA
3.239
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.0
12
48
NM
NM
NM
11.2
NM
15.28
NA
NA
NA
NA
NA
<50
2.889
4.072
NA
1.544
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.4
17
42
NM
NM
NM
9.5
NM
13.68
NA
NA
NA
NA
NA
<50
2.424
3.818
NA
1.846
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.5
16
46
NM
NM
NM
11.4
NM
13.2
NA
NA
NA
NA
NA
<50
2.84
3.92
NA
1.65
41
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.4
12
41
9.46
387
592
9.4
NM
10.1
NA
NA
NA
NA
NA
<50
2.27
3.42
NA
2.33
44
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.6
14
42
9.28
333
538
7.8
NM
10.8
NA
NA
NA
NA
NA
<50
2.55
3.51
NA
1.22
43
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.5
16
39
9.93
333
538
9.0
NM
<20
NA
NA
NA
NA
NA
9.68 j
2.15
3.43
NA
2.25
38
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.6
13
43
9.07
288
493
7.1
NM
10.9
NA
NA
NA
NA
NA
3.39 j
2.73
3.77
NA
1.25
38
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.7
13
40
9.63
274
479
5.6
NM
8.07
NA
NA
NA
NA
NA
6.55 j
2.24
3.68
NA
2.04
53
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.5
13
44
8.53
309
514
11.3
NM
11
NA
NA
NA
NA
NA
6.42 j
2.64
3.93
NA
1.59
50
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.4
13
38
11.16
277
482
8.7
NM
7.6
NA
NA
NA
NA
NA
6.61 j
2.17
3.57
NA
1.72
35
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.5
12
45
8.98
323
528
8.3
NM
11
NA
NA
NA
NA
NA
8.93 j
2.81
4.13
NA
1.27
42
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.6
17
41
8.63
535
740
15.7
NM
7.66
NA
NA
NA
NA
NA
9.51 j
2.62
3.64
NA
3.21
36
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.6
22
51
7.70
162
367
8.3
NM
6.5
NA
NA
NA
NA
NA
<50
2.89
4.1
NA
1.4
71
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.9
17
41
8.58
349
554
59.8
NM
7.43
NA
NA
NA
NA
NA
16.5 j
2.76
2.56
NA
3.93
36
CCPSW-02
Unit 5 Inactive Basin
WS-IV
7.0
14
45
9.24
294
499
14.6
NM
10.2
NA
NA
NA
NA
NA
<50
2.53
3.92
NA
2.19
40
CCPSW-02
Unit 5 Inactive Basin
WS-IV
6.6
20
42
6.60
58
263
12.3
NM
8.54
NA
NA
NA
NA
NA
<50
2.36
3.41
NA
2.11
48
SW-01
Unit 5 Inactive Basin
WS-IV
7.3
31
142
5.88
14
219
9.1
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
7.9
31
132
6.11
80
285
14.6
NM
26.3 j-
26.3
21.3
<0.1
4.3
15
<50
14
6.1
38
20.5
100
SW-01
Unit 5 Inactive Basin
WS-IV
9.0
24
130
4.58
-44
161
6.3
NM
20.2
20.2
13.3
<0.1
5
4.8
<50
11
6.2
36
17
66
SW-01
Unit 5 Inactive Basin
WS-IV
6.6
22
125
7.20
127
332
9.7
NM
16.8
16.8
<10
<0.1
2.2
<2.5
<50
11.8
5.8
31.4
18.3
62
Page 16 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
(Nitrate
as N)
Nitrate +
Nitrite
Potassium
Selenium
Silver
Sodium
Thallium
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg-N/L
mg/L
ug/L
ug/L
mg/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
10
1000
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
0.012
NE
25
NE
10
NE
5
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
69.2-1760
<0.1-<5 NE
NE
NE
NE
NE
NE
NE
NE
225-3630
NE
NE
NE
17.6-160
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BRU14-03 (4)
Former Units 1-4 basin
WS-IV
333
<0.1
0.24
13.7
0.017 j
<0.05
0.068 j,D3
0.55
0.27 B
0.54 B
581
0.28
NA
1.2
46
0.00101
<0.11
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.27 j
<0.dj
SW-BRU5-01 (1)
Former Units 1-4 basin
WS-IV
171
<0.1
0.12
14
<0.01
<0.05
0.078 j,D3
0.49 j
0.12
0.37 j
433
0.23
NA
1.34
26.8
0.000878 B
<0.11
<0.44
NA
0.24
<2.5
<0.31
<0.07
3.49 j
<0.
SW-BRU5-01 (2)
Former Units 1-4 basin
WS-IV
181
<0.1
0.14
13.5
<0.01
<0.05
0.073 j,D3
0.49 j
0.12
0.33 j
428
0.15
NA
1.35
26.8
0.0008 B
<0.11
<0.44
NA
0.24
<2.5
<0.31
<0.07
3.51 j
<0.
SW-BRU5-01 (3)
Former Units 1-4 basin
WS-IV
299
<0.1
0.18
13.7
0.024 j
<0.05
0.081 j,D3
0.51
0.16
0.7
521
0.31
NA
1.18
31.3
0.000935
<0.11
<0.44
NA
0.22
<2.5
<0.31
<0.07
3.61 j
0.05SW-BRU5-01
(4)
Former Units 1-4 basin
WS-IV
268
<0.1
0.2
16.4
0.012 j
<0.05
0.079 j,D3
0.47 j
0.14
0.52
470
0.25
NA
1.17
28.6
9.11E-04
<0.11
<0.44
NA
0.21
<2.5
<0.31
<0.07
3.18 j
<0.A
2UP
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
17
NA
<0.1
NA
<1
NA
<1
NA
0.325
NA
1.26
NA
0.00115
NA
<1
NA
0.16
NA
<1
NA
NA
<0
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
15
NA
<0.1
NA
<1
NA
<1
NA
0.282
NA
1.16
NA
0.000974
NA
<1
NA
0.089
NA
<1
NA
NA
<0.2
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
23
NA
<0.1
NA
1.37
NA
1.25
NA
1.03
NA
1.23
NA
0.00364
NA
<1
NA
0.23
NA
<1
NA
NA
<0.2
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
16
NA
<0.1
NA
<1
NA
<1
NA
0.288
NA
1.06
NA
0.00208
NA
<1
NA
0.26
NA
<1
NA
NA
<0.2
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
17
NA
<0.1
NA
<1
NA
<1
NA
0.366
NA
1.2
NA
0.00158
NA
<1
NA
0.22
NA
<1
NA
NA
<0.2 B3
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<10
NA
NA
<1
NA
<10
NA
NA
NA
<10
NA
NA
NA
NA
NA
<10
NA
NA
NA
<10
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
<0.1
NA
<1
NA
NA
NA
<1
NA
1.3
NA
NA
NA
<1
NA
NA
<5
<1
NA
<5
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
<5
<5
19.6
<1
<1
NA
<5
0.0016 j
1.2 j
NA
<5
NA
NA
NA
NA
NA
<5
NA
NA
NA
<10
<5
NA
<10
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.0002 j
NA
NA
<1
NA
0.0009 j
NA
NA
NA
0.3 j
NA
1.224
NA
NA
NA
0.7 j
NA
NA
1.654
<1
NA
2.519
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
<1
NA
<1
NA
NA
NA
<1
NA
1.378
NA
NA
NA
<1
NA
NA
2.123
<1
NA
2.633
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
<1
NA
<1
NA
NA
NA
<1
NA
1.31
NA
NA
NA
<1
NA
NA
1.657
<1
NA
2.594
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
<5
NA
<1
NA
<1
NA
<5
2420
<1
NA
1.32
119
<0.05
NA
<1
0.294
NA
2.11
<1
<5
2.56
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
23
NA
<1
NA
<1
NA
<5
1140
<1
NA
1.19
70.4
<0.05
NA
0.677 j
0.332
NA
1.7
<1
<5
2.79
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.259 j
22.3
NA
<1
NA
0.53 j
NA
<5
1580
0.226 j
NA
1.32
61.3
<0.05
NA
0.476 j
0.393
NA
1.95
0.2011
<5
2.54
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0. 197 j
24
NA
<1
NA
0.56 j
NA
<5
997
0.3 j
NA
1.17
45
0.014 j
NA
0.495 j
0.419
NA
1.64
<1
<5
2.38
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.303 j
21.9
NA
<1
NA
0.226 j
NA
<5
1250
0. 131 j
NA
1.39
41
<0.05
NA
0.238 j
0.37
NA
2.07
<1
2.66 j
2.62
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0. 186 j
22.8
NA
<1
NA
0.321 j
NA
1.75 j
1010
0.132 j
NA
1.14
38.6
0.012 j
NA
0.2 j
0.425
NA
1.56
<1
<5
2.45
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.356 j
21.9
NA
<1
NA
0.278 j
NA
<5
1250
0.138 j
NA
1.32
38
0.009 j
NA
0.372 j
0.341
NA
2.19
<1
<5
2.6
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.238 j
24.3
NA
<1
NA
0.363 j
NA
1.13 j
1020
0.177 j
NA
1.14
47.6
<0.05
NA
0.414 j
0.447
NA
1.59
<1
<5
2.4
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.32 j
19.6
NA
<1
NA
0.375 j
NA
1.14 j
1520
0.257 j
NA
1.36
45
<0.05
NA
0.332 j
0.405
NA
2.04
0.3411
<5
2.84
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.502 j
27.3
NA
<1
NA
0.855 j
NA
1.15 j
1580
0.526 j
NA
1.32
58.8
<0.05
NA
0.74 j
0.334
NA
2.22
<1
<5
2.46
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
23
NA
<1
NA
<1
NA
<5
1320
<1
NA
1.54
38
<0.05
NA
<1
0.25
NA
2.61
<1
<5 B7
2.51
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.681 j
32.5
NA
<1
NA
2.99
NA
2.16 j
2740
1.57
NA
1.44
52.5
<0.05
NA
1.23
0.28
NA
2.84
<1
<1
1.76
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
25.7
NA
<1
NA
0.55 j
NA
1.74 j
1160
<1
NA
1.38
51.1
<0.05
NA
0.394 j
0.442
NA
2.49
<1
<1
2.59
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
24.9
NA
<1
NA
0.578 j
NA
0.66 j
1140
<1
NA
1.23
41.9
<0.05
NA
0.406 j
0.469
NA
1.85
<1
<1
2.24
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<10
NA
NA
<1
NA
<10
NA
NA
NA
<10
NA
NA
NA
NA
NA
<10
NA
NA
NA
<10
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
<0.1
NA
<1
NA
NA
NA
<1
NA
1.32
NA
NA
NA
<1
NA
NA
<5
<1
NA
<5
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
<5
<5
20.7
<1
<1
NA
<5
0.0013 j
0.53 j
NA
<5
NA
NA
NA
NA
NA
<5
NA
NA
NA
<10
<5
NA
<10
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.0002 j
NA
NA
<1
NA
0.0008 j
NA
NA
NA
0.2 j
NA
1.25
NA
NA
NA
0.5 j
NA
NA
1.635
<1
NA
2.494
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
<1
NA
<1
NA
NA
NA
<1
NA
1.43
NA
NA
NA
<1
NA
NA
2.147
<1
NA
2.596
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
<1
NA
<1
NA
NA
NA
<1
NA
1.199
NA
NA
NA
<1
NA
NA
1.621
<1
NA
2.579
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
<5
NA
<1
NA
<1
NA
<5
1950
<1
NA
1.34
91.1
<0.05
NA
<1
0.322
NA
2.03
<1
<5
2.51
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
22.9
NA
<1
NA
<1
NA
<5
1110
<1
NA
1.17
62.2
<0.05
NA
<1
0.344
NA
1.56
<1
<5
2.39
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.282 j
21.4
NA
<1
NA
0.487 j
NA
1.19 j
1320
0.219 j
NA
1.32
50.3
<0.05
NA
0.446 j
0.416
NA
1.93
0.2 j
<5
2.59
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.222 j
23.2
NA
<1
NA
0.55 j
NA
<5
864
0.299 j
NA
1.18
40.8
<0.05
NA
0.509 j
0.425
NA
1.58
0. 133 j
<5
2.34
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.276 j
22.1
NA
<1
NA
0.2411
NA
<5
1120
0.083 j
NA
1.41
44
<0.05
NA
0.6 j
0.354
NA
2.02
<1
2.5 j
2.61
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0. 181 j
23.1
NA
<1
NA
0. 699 j
NA
1.58 j
933
0.12 j
NA
1.18
35
0.009 j
NA
0.348 j
0.429
NA
1.56
<1
<5
2.47
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.345 j
22.6
NA
<1
NA
0.536 j
NA
<5
1300
0.337 j
NA
1.33
41.1
0.009 j
NA
0.387 j
0.295
NA
2.2
<1
<5
2.57
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.206 j
24.2
NA
<1
NA
0.325 j
NA
<5
934
0. 165 j
NA
1.16
46.4
<0.05
NA
0.414 j
0.433
NA
1.57
<1
<5
2.43
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.316 j
20.3
NA
<1
NA
0. 316 j
NA
<5
1680
0.165 j
NA
1.39
64.2
<0.05
NA
0.268 j
0.35
NA
2.03
<1
<5
2.71
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.436 j
27.9
NA
<1
NA
1.05
NA
1.04 j
1690
0.576 j
NA
1.37
51
<0.05
NA
0.614 j
0.342
NA
2.26
<1
<5
2.46
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
23
NA
<1
NA
<1
NA
<5
1300
<1
NA
1.57
37
<0.05
NA
<1
0.24
NA
2.6
<1
<5 B7
2.51
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
0.759 j
34.7
NA
<1
NA
4.73
NA
2.711
3630
2.21
NA
1.5
50.2
<0.05
NA
1.69
0.279
NA
2.85
<1
<1
1.57
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
24.9
NA
<1
NA
0.509 j
NA
1.26 j
1090
<1
NA
1.36
47.7
<0.05
NA
0.376 j
0.454
NA
2.38
<1
<1
2.44
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
25.6
NA
<1
NA
0.508 j
NA
<5
1140
<1
NA
1.29
42.4
<0.05
NA
0.359 j
0.484
NA
1.85
<1
<1
2.24
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
<100
<0.5
1.8
29
<0.2
<0.08
NA
0.35 j
<0.5
0.36 j
750
0.065 j
NA
3.16
49
<0.2
0.38 j
2
NA
0.0111
4.23 j
<0.5
NA
<5
<0.1
SW-01
Unit 5 Inactive Basin
WS-IV
74 j
<0.5
1.5
22
<0.2
<0.08
NA
0.74 j+
0.15 j
0.38 j+
440
0.62
NA
3.04
20
<0.2
0.45 j
1.9
NA
<0.02
4.29 j
<0.5
NA
2.65 j
0.021 j
SW-01
Unit 5 Inactive Basin
WS-IV
<100
<0.5
0.52
22.4
0.015 j
<0.08
<0.03
0.28 j+
0.14
0.4 j
442
<0.1
NA
3.04
9.2
0.000496 j
<0.5
1.7
NA
0.02 j
3.2 j
<0.5
NA
2.6 j
<0.1
Page 17 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Tin
Titanium
Vanadium
Zinc
Aluminum
(0.45u)
Antimony
(0.45u)
Arsenic
(0.45u)
Barium
(0.45u)
Beryllium
(0.45u)
Boron
(0.45u)
Cadmium
(0.45u)
Calcium
(0.45u)
Chromium
(0.45u)
Cobalt
(0.45u)
Copper
(0.45u)
Iron
(0.45u)
Lead
(0.45u)
Lithium
(0.45u)
Magnesium
(0.45u)
Manganese
(0.45u)
Mercury
(0.45u)
Molybdenum
(0.45u)
Nickel
(0.45u)
Phosphorus
(0.45u)
Reporting Units
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
150
NE
6.5
NE
0.15
NE
24
NE
2.7
NE
0.54
NE
NE
NE
NE
NE
16
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
I NE
NE
NE
NE
NE
NE
NE
I NE NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BRU14-03 (4)
Former Units 1-4 basin
WS-IV
NA
NA
1.1
<2.5
<50
<0.1
0.18
11.7
<0.01
<25
<0.05
3.35
0.24 j
0.12
1.4
31.6 j
<0.09
NA
1.23
28.1
0.000509
<0.11
<0.44
NA
SW-BRU5-01 (1)
Former Units 1-4 basin
WS-IV
NA
NA
0.88 B
22.9 B
61.9 j
<0.1
0.12
12.2
<0.01
<25
<0.05
3.62
0.32 j
0.055 j
0.62
137
<0.09
NA
1.37
15.7
5.91E-04 B
<0.11
<0.44
NA
SW-BRU5-01 (2)
Former Units 1-4 basin
WS-IV
NA
NA
0.89 B
5.3 j,B
<50
<0.1
0.098 j
12.1
<0.01
<25
<0.05
3.61
0.23 j
0.047 j
0.42 j
134
<0.09
NA
1.36
15.6
0.000528 B
<0.11
<0.44
NA
SW-BRU5-01 (3)
Former Units 1-4 basin
WS-IV
NA
NA
1.1 B
<2.5
<50
<0.1
0.11
12.1
<0.01
<25
<0.05
3.36
0.23 j
0.0511
0.35 j
53.7
<0.09
NA
1.24
14.8
9.90E-04
<0.11
<0.44
NA
SW-BRU5-01 (4)
Former Units 1-4 basin
WS-IV
NA
NA
1.2 B
3.4 j
<50
<0.1
0.099 j
12
<0.01
<25
<0.05
3.38
<0.09
0.045 j
0.26 j
28.4 j
<0.09
NA
1.24
15.2
0.000709
<0.11
<0.44
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
<1
NA
NA
NA
<0.1
NA
<1
NA
<1
NA
<0.2
NA
NA
NA
NA
NA
<1
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
8.21
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
5.28
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
3.5 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
6.28
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
4.03 j
NA
NA
0.15 j
20
NA
11.9 j
<1
NA
<5
NA
<5
399
<1
NA
NA
36.7
NA
NA
1.55 j
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
3.18 j
NA
NA
NA
NA
NA
NA
<1
NA
0.0828 j
NA
0.413 j
NA
<1
NA
NA
NA
NA
NA
0.4 j
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
3.17 j
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
0.195 j
NA
<1
NA
NA
NA
NA
NA
0.258 j
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
5.08
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
5.63
NA
<1
NA
NA
NA
NA
NA
0.923 j
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
<1
NA
<1
NA
NA
NA
NA
NA
<1
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
5
NA
NA
NA
NA
NA
NA
<1
NA
0.844 j
NA
1.23
NA
0.362 j
NA
NA
NA
NA
NA
0.793 j
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
2.08 j
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
0.403 j
NA
<1
NA
NA
NA
NA
NA
0.369 j
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
0.761 j
NA
<1
NA
NA
NA
NA
NA
0.648 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
3.39 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
2.93 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
0.13 j
21.9
NA
13.9 j
<1
NA
<5
NA
<5
340
<1
NA
NA
39.8
NA
NA
0.654 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
<1
NA
0.0964 j
NA
0.263 j
NA
<1
NA
NA
NA
NA
NA
0.452 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
<1
NA
<1
NA
NA
NA
NA
NA
0.232 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
0.678 j
NA
<1
NA
NA
NA
NA
NA
0.693 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
<1
NA
<1
NA
NA
NA
NA
NA
<1
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
7
NA
NA
NA
NA
NA
NA
<1
NA
0.713 j
NA
1.17
NA
0.34 j
NA
NA
NA
NA
NA
0.787 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
1.71 j
NA
NA
NA
NA
NA
NA
<1
NA
<1
NA
1.1
NA
<1
NA
NA
NA
NA
NA
0.4 j
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
<1
NA
0.334 j
NA
0.497 j
NA
<1
NA
NA
NA
NA
NA
0.553 j
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.65 j
<10
<100
<0.5
1.2
27
<0.2
<50
<0.08
NA
0.34 j
<0.5
0.87 j
<50
<0.1
NA
NA
<5
0.1 j
0.35 j
1.4
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.74 j
2.9 j+
<100
<0.5
1.2
20
<0.2
<50
<0.08
NA
0.25 j
<0.5
6
120
0.71
NA
NA
<5
<0.2
0.44 j
1.3
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.11 j
<SO
<S00
<0.5
0.44
21.1
<0.1
<50
<0.08
NA
0.23 j+
0.1
0.75
115
<0.1
NA
NA
6.5
NA
<0.5
1.6
NA
Page 18 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
SPECIATIONS
Potassium
(0.45u)
Selenium
(0.45u)
Silver
(0.45u)
Sodium
(0.45u)
Strontium
(0.45u)
Thallium
(0.45u)
Vanadium
(0.45u)
Zinc
(0.45u)
Radium-226
Radium-226
Arsenic (Speciation)
As(III)III)
As(V)
Cr(III)
Cr(VI)
DIS
Cr(VI)
Iron (Speciation)
Fe(II)
Fe(III)
Manganese
(Speciation)
DIS
Manganese
(Speciation)
Mn(II)
Mn(IV)
Se(IV)
Se(VI)
Reporting Units
mg/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
pCi/L
pCi/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
NE
36
NE
NE
NE
NE
NE
24
11
11
NE
NE
NE
NE
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BRU14-03 (4)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.94 j
24.3
<0.015
0.34 B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU5-01 (1)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.42 j
24.4
<0.015
0.32
3.3 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU5-01 (2)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.44 j
24.1
<0.015
0.26 j
3.5 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU5-01 (3)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.88 j
23.3
0.043 j
0.29 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU5-01 (4)
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.37 j
23.6
<0.015
0.28 j,B
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
4.54 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
6.01
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
12.9
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
4.8 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
4.33 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
3 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
3.72 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
5.85
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.525
0.248
NA
NA
0.09 j-
NA
133 j-
355
NA
NA
20.3
10.2 j-
<0.5
<0.5
SW-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
37
<0.1
<1
3.5 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
38
0.017 j
0.36 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
30.3
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
<0.03
NA
NA
NA
NA
NA
NA
NA
NA
NA
Page 19 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
OTHER PARAMETERS
BOD
Bromide
Carbonate Alkalinity
COD
Fluoride
Hardness
Nitrate
Nitrogen, Kjeldahl, total
Oil and grease
Phosphate
Phosphorus
Reporting Units
mg/L
ug/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
1.6
100
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BRU14-03 (4)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
12.9
NA
NA
NA
NA
NA
SW-BRU5-01 (1)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
14.6
NA
NA
NA
NA
NA
SW-BRU5-01 (2)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
14.5
NA
NA
NA
NA
NA
SW-BRU5-01 (3)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
13
NA
NA
NA
NA
NA
SW-BRU5-01 (4)
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
12.3
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
<100
NA
NA
<0.1
12.9
NA
NA
<5
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
<100
NA
NA
<0.1
12.6
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
<100
NA
NA
<0.1
12.6
NA
NA
NA
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
<100
NA
NA
<0.1
10.7
NA
NA
<5
NA
NA
A 2 UP
Unit 5 Inactive Basin
WS-IV
NA
<100
NA
NA
<0.1
12.5
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.046 j
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.5
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
6.4E-05 j
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
8.0E-02 j
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
8.05E-02 j
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
8.19E-02 j
NA
0.294
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.087 j
NA
0.332
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0671 j
NA
0.393
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0691 j
NA
0.419
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0616 j
NA
0.37
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.057 j
NA
0.425
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0698 j
NA
0.341
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.031 j
NA
0.447
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
10.6
NA
0.046 j
NA
0.405
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
1.1
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.011 j
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
CCPSW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.042 j
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.5
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.000065 j
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
7.88E-02 j
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
8.05E-02 j
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0882 j
NA
0.322
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0857 j
NA
0.344
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0667 j
NA
0.416
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0698 j
NA
0.425
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0652 j
NA
0.354
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0588 j
NA
0.429
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0851 j
NA
0.295
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.03 j
NA
0.433
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
11
NA
0.0484 j
NA
0.35
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.0671 j
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
1.1
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
0.01 j
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
CCPSW-02
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
<0.1
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
Page 20 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
yt
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
pH
Temperature
Specific
Conductance
Dissolved
Oxygen
Oxidation
Reduction
Potential
Eh
Turbidity
Flow
Alkalinity
Bicarbonate
Alkalinity
Methane
Sulfide
Total
Organic
Carbon
Total
Suspended
Solids
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Reporting Units
S.U.
Deg C
umhos/cm
mg/L
mV
mV
NTUs
GPM
mg/L
mg/L
ug/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
mg/L
mg/L
15A NCAC 02B (Class C, WS-IV)
6.0-9.0
32
NE
4
NE
NE
25
NE
NE
NE
NE
NE
NE
NE
NE
NE
250
NE
250
500
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
5.2-64.2
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-01
Unit 5 Inactive Basin
WS-IV
7.3
24
250
7.00
164
369
4.7
NM
25
25
27.9
<0.1
5
<5
<50
10.8
5.3
29.8
11.7
58
SW-01
Unit 5 Inactive Basin
WS-IV
8.1
27
95
6.69
224
429
3.3
NM
19.8
19.8
13.4 j-
<0.1
3.1
<3.1
<50
9.04
5.1
30.8
13.4
26
SW-01
Unit 5 Inactive Basin
WS-IV
6.2
8
93
11.60
239
444
1.0
NM
12.1
12.1
<10
<0.1
1.7
<2.5
<50
7.54
6.3
32.7
17.8
27
SW-01
Unit 5 Inactive Basin
WS-IV
7.1
8
182
9.51
141
346
8.4
NM
11.3
11.3
<10
<0.1
2.9
9.6
<50
8.64
5.4
29.8
19.9
59
SW-01
Unit 5 Inactive Basin
WS-IV
8.5
27
96
6.80
201
406
5.4
NM
14.8
14.8
26.6
<0.1
3.3
<2.5
<50
8.69
3.8
31.4
15.7
52
SW-09
Unit 5 Inactive Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
24.4
24.4
2.2 j
<0.1
0.89 j
33.4
<50
7.43
20.4
34
0.62 j
308
SW-09
Unit 5 Inactive Basin
WS-IV
7.3
21
55
8.00
72
277
5.2
NM
13
13
<10
<0.1
0.51 j
3.4
32.9 j+
2.83
1.7
18.8
1.7
40 j
SW-09
Unit 5 Inactive Basin
WS-IV
7.4
25
57
6.70
206
411
10.3
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
7.8
24
45
7.15
246
451
10.5
NM
14.8
14.8
18.6 j-
<0.1
1.2
6.7
<50
3.3
2.1
23.8
1.4
10000
SW-09
Unit 5 Inactive Basin
WS-IV
6.1
7
55
9.90
266
471
6.1
NM
16.1
16.1
<10
<0.1
0.56 j
5.6
<50
3.2
2
24.2
1.4
<25
SW-09
Unit 5 Inactive Basin
WS-IV
6.8
14
71
6.90
108
313
3.8
NM
15
15
<10
<0.1
0.77 j
<2.5
<50
3.64
2.3
24.8
1.4
34
SW-09
Unit 5 Inactive Basin
WS-IV
6.9
23
85
5.70
154
359
8.6
NM
15.4
15.4
31.4 j
<0.1
1.1
2.9
<50
3.18
2.2
25.8
1.9
37
SW-09
Unit 5 Inactive Basin
WS-IV
7.1
26
55
4.70
133
338
44.9
NM
14.8
14.8
NA
<0.1
2.5
20
<50
3.25
2
23.3
2.1
44
SW-09
Unit 5 Inactive Basin
WS-IV
1 6.8
11
61
9.20
160
365
6.5
NM
15
15
NA
<0.1
1
4.6
<50
3.45
1.8
23.7
1.7
NA
SW-09
Unit 5 Inactive Basin
WS-IV
7.1
8
211
10.50
91
296
4.7
NM
13.6
13.6
NA
<0.1
1
7.8
<50
2.84
2.4
19.1
1.5
31
SW-09
Unit 5 Inactive Basin
WS-IV
7.2
21
47
5.90
71
276
6.5
NM
11.2
11.2
NA
<0.1
1.1
6.9
<50
3.03
1.7
19.1
1.5
40
SW-10A
Unit 5 Inactive Basin
WS-IV
7.3
21
58
5.20
NM
NM
4.6
NM
14.4
14.4
<10
<0.1
1
<5
<50
5.05
4.5
36.7
3.5
31
SW-10A
Unit 5 Inactive Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
20.9
20.9
<10
<0.1
1.1
6.5
492
27.6
35.1
166
27.7
193
SW-10A
Unit 5 Inactive Basin
WS-IV
7.5
21
110
9.58
186
391
11.6
NM
19.6
19.6
15.7
<0.1
1.5
10.9 j+
96.2
10.5
11.9
66.6
9.5
72
SW-10A
Unit 5 Inactive Basin
WS-IV
6.8
10
398
13.80
100
305
8.8
NM
21.2
21.2
<10
<0.1
0.83 j
<2.5
471
22.1
30.8
145
23.1
124
SW-10A
Unit 5 Inactive Basin
WS-IV
7.2
15
115
7.90
84
289
4.5
NM
16.8
16.8
<10
<0.1
1.2
<2.5
<50
3.78
3.5
27.2
1.7
29
SW-10A
Unit 5 Inactive Basin
WS-IV
5.9
28
105
5.80
196
401
8.0
NM
14.8
14.8
<10
<0.1
1.2
6.2
192
10
11
64.4
11.3
72
SW-10A
Unit 5 Inactive Basin
WS-IV
7.0
25
62
5.30
-57
148
26.0
NM
17.2
17.2
NA
<0.1
2.2
26.8
27.4 j
4.56
3.9
31.5
3.4
33
SW-10A
Unit 5 Inactive Basin
WS-IV
7.6
10
57
8.70
132
337
5.5
NM
14.7
14.7
NA
<0.1
1.1
<5
69.3
5.43
5
37.3
4.4
45
SW-10A
Unit 5 Inactive Basin
WS-IV
7.1
8
64
10.60
77
282
11.1
NM
14.4
14.4
NA
<0.1
<1
<5
205
7.5
10.5
51.5
4.8
62
SW-l0A
Unit 5 Inactive Basin
WS-IV
7.3
23
61
2.30
-45
160
18.6
NM
13.3
13.3
NA
<0.1
1.1
8.5
<50
3.7
3.4
26.3
3.4
37
SW-10B
Unit 5 Inactive Basin
WS-IV
7.5
21
44
4.09
NM
NM
5.0
NM
14.4
14.4
<10
<0.1
0.87 j
10.5
<50
3.23
2
22.9
1.9
26
SW-10B
Unit 5 Inactive Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
16.5
16.5
<10
<0.1
1.2
7.8
43.1 j
5.33
5.9
35.9
3.9
51
SW-10B
Unit 5 Inactive Basin
WS-IV
7.9
24
68
6.23
0
205
13.4
NM
19.1
19.1
14.5
<0.1
1.3
9.3 j+
<50
3.91
3.1
26.5
1.9
<25
SW-10B
Unit 5 Inactive Basin
WS-IV
7.5
6
67
11.62
110
315
10.7
NM
18.6
18.6
<10
<0.1
1.1
<2.5
<50
3.78
3.3
25.4
2
36
SW -SOB
Unit 5 Inactive Basin
WS-IV
7.4
14
52
9.20
74
279
4.4
NM
20.8
20.8
12.8
<0.1
1.1
<2.5
99.5
12.4
15.5
87.2
10.3
70
SW -SOB
Unit 5 Inactive Basin
WS-IV
6.2
24
50
5.90
186
391
8.4
NM
13.9
13.9
<10
<0.1
1.3
4.3
<50
3.32
2.8
25.1
2.7 j+
41
SW-10B
Unit 5 Inactive Basin
WS-IV
7.0
24
61
4.60
-67
138
17.3
NM
18.1
18.1
NA
<0.1
1.6
10.4
<50
3.91
2.8
28.1
2.4
36
SW -SOB
Unit 5 Inactive Basin
WS-IV
7.8
9
42
8.80
1193
398
5.7
NM
15
15
NA
<0.1
1 j,Ml
4.4
<50
3.43
2
24.3
1.9
41
SW-10B
Unit 5 Inactive Basin
WS-IV
7.2
8
64
10.00
78
283
10.6
NM
13.4
13.4
NA
<0.1
<1
3.6
<50
3.4
3.9
24.2
2
38
SW -SOB
Unit 5 Inactive Basin
WS-IV
7.4
23
54
5.50
-45
161
22.5
NM
13.2
13.2
NA
<0.1
0.97 j
5.9
<50
2.91
2
20
1.9
37
SW-loc
Unit 5 Inactive Basin
WS-IV
7.5
21
50
4.07
NM
NM
6.9
NM
15.4
15.4
<10
<0.1
1
8 j
<50
3.61 j
2.5 j
24. 1j
2 j
36
SW-loc
Unit 5 Inactive Basin
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
16.4
16.4
<10
<0.1
1
6.3
<50
3.5
2.5
25.4
1.5
156
SW-loc
Unit 5 Inactive Basin
WS-IV
7.6
24
57
6.46
19
224
26.0
NM
15.9
15.9
15.6
<0.1
1.2
8.6 j+
<50
3.59
2.7
24.4
1.7
40
SW-loc
Unit 5 Inactive Basin
WS-IV
7.5
7
53
11.30
105
310
5.3
NM
19.2
19.2
<10
<0.1
1.2
<2.5
<50
3.72
3.3
26.8
1.8
30
SW-loc
Unit 5 Inactive Basin
WS-IV
7.9
13
660
13.90
77
282
5.0
NM
16.3
16.3
<10
<0.1
1.1
<2.5
<50
3.68
3.3
25.5
1.6
39
SW-loc
Unit 5 Inactive Basin
WS-IV
6.5
28
61
5.30
161
366
8.7
NM
9.9
9.9
12.5
<0.1
1.2
6.1
<50
3.15
2.5
22.4
2.3 j+
37
SW-loc
Unit 5 Inactive Basin
WS-IV
7.1
25
24
4.60
-68
137
18.1
NM
16.4
16.4
NA
<0.1
1.6
10
<50
3.97
2.9
28.3
2.5
28
SW-loc
Unit 5 Inactive Basin
WS-IV
7.9
10
57
8.70
191
396
5.9
NM
16.9
16.9
NA
<0.1
0.95 j
2.8
<50
3.76
2.3
24.4
1.8
44
SW-loc
Unit 5 Inactive Basin
WS-IV
7.2
9
64
9.90
80
285
10.0
NM
15.6
15.6
NA
<0.1 RI
<1
5.4 D6
<50
3.45 M1
2.9
23.4
1.6
30
SW-loc
Unit 5 Inactive Basin
WS-IV
7.4
23
51
6.60
-44
161
21.6
NM
16.5
16.5
NA
<0.1
1
7.4
<50
3.41
2.2
23.2
2
38 D6
SW-BR-01
Unit 5 Inactive Basin
WS-IV
7.4
22
48
5.20
111
316
7.1
NM
16.3
16.3
<10
<0.1
1.3
4.7
<50
3.52
2.1
24.5
1.6
31
SW-BR-01
Unit 5 Inactive Basin
WS-IV
6.7
9
67
8.90
148
353
29.8
NM
11.2
11.2
NA
<0.1
1.1
31
<50
2.6
2.8
19.4
1.8
37
SW-BR-01
Unit 5 Inactive Basin
WS-IV
6.8
28
46
5.40
202
407
24.1
NM
12.8
12.8
NA
<0.1
0.9 j
19.9
<50
2.99
2.1
22.7
1.4
30
SW-BR-02
Unit 5 Inactive Basin
WS-IV
6.5
20
54
7.70
186
391
6.6
NM
16.9
16.9
18.4
<0.1 RI
1.2
5
<50
3.66
2.1
22.3
1.6
35
SW-BR-02
Unit 5 Inactive Basin
WS-IV
7.5
9
48
9.30
51
256
14.8
NM
11
11
NA
<0.1
0.82 j
16
<50
2.5
2.7
17.5
1.8
38
SW-BR-02
Unit 5 Inactive Basin
WS-IV
7.1
28
46
6.60
42
247
16.1
NM
12.9
12.9
NA
<0.1
0.78 j
16.2
<50
2.98
2.1
22.6
1.5
28
Page 21 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
(Nitrate
as N)
Nitrate +
Nitrite
Potassium
Selenium
Silver
Sodium
Thallium
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg-N/L
mg/L
ug/L
ug/L
mg/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
10
1000
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
0.012
NE
25
NE
30
NE
5
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
69.2-1760
<0.1-<5 NE
NE
NE
NE
NE
NE
NE
NE
225-3630
NE
NE
NE
17.8-160
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-01
Unit 5 Inactive Basin
WS-IV
<100
<0.5
1.6
19.4
0.035 j+
<0.08
0.022 j
0.52 j+
0.094 j
0.6 j+
320
0.12
NA
3.12
20.8
0.00193 j+
0.3 j
1.1
NA
<0.02
3.09 j
<0.5
NA
2.4 j
0.027 j
SW-01
Unit 5 Inactive Basin
WS-IV
<100
<0.5
1.1
19.8
0.036 j+
<0.08
<0.15
0.31 j+
0.095 j
0.37 j
244
<0.1
NA
2.67
8.5
0.000472 j
0.32 j
1.6
NA
<0.02
3.82 j
<0.5
NA
2.49 j
0.065 j
SW-01
Unit 5 Inactive Basin
WS-IV
<100
<0.5
0.48
23.2
<0.1
<0.08
0.049 j,D3
0.39 j
0.083 j
0.25 j
190
<0.1
NA
2.59
<5
0.000384 j
<0.5
1.8
NA
0.1
3.23 j
<0.5
NA
2.84 j
0.018 j
SW-01
Unit 5 Inactive Basin
WS-IV
69.4 j
<0.5
0.46
26.4
0.064 j+
<0.08
0.061 j+
0.45 j+
0.1 j+
0.76 j+
186
0.11
NA
2.46
<5
0.00103
0.14 j+
2.2 j+
NA
0.07
4.06 j
<0.5
NA
2.22 j
0.061 j+
SW-01
Unit 5 Inactive Basin
WS-IV
<100
<0.5
0.61
22.5
0.016 j
<0.08
0.085
<0.5
0.069 j
0.59
333
<0.1
NA
2.27
6.4
0.00123 j+
0.16 j
1.2
NA
<0.02
3.5 j
0.34 j
NA
1.84 j
0.032 j
SW-09
Unit 5 Inactive Basin
WS-IV
170
<0.5
<0.5
39
0.085 j
<0.08
NA
0.2 j
2.1
0.57 j
640
0.29
NA
3.6
160
<0.2
<0.5
1.7
NA
0.15
2.85 j
<0.5
NA
10
0.054 j
SW-09
Unit 5 Inactive Basin
WS-IV
98.4 j
<0.5
0.089 j
11.9
<0.1
<0.08
0.042
0.35 j+
0.11
0.35 j
225
0.14
NA
1.09
17.8
0.000656
<0.5
<0.5
NA
0.12
<5
<0.5
NA
2.96 j
<0.1
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
69.2 j
<0.5
0.17
13.1
0.02 j+
<0.08
<0.3
0.36 j+
0.16
0.34 j
252
0.2
NA
1.24
42.6
0.000965
<0.5
<0.5
NA
9.20E-02
<5
<0.5
NA
3.24 j
0.021 j
SW-09
Unit 5 Inactive Basin
WS-IV
121
<0.5
0.12
12.4
0.016 j
<0.08
0.068 j,D3
0.49 j
0.12
0.27 j
448
0.16
NA
1.15
28.8
0.000727
<0.5
<0.5
NA
0.12
<5
<0.5
NA
3.38 j
<0.1
SW-09
Unit 5 Inactive Basin
WS-IV
115
<0.5
0.21
13.3
0.044 j
<0.08
0.074 j,D3
0.31 j+
0.13 j+
0.44 j
388
0.2
NA
1.3
24.3
0.000837
0.12 j
<0.5
NA
0.22
<5
<0.5
NA
3.41 j
0.049 j
SW-09
Unit 5 Inactive Basin
WS-IV
137 j
<0.5
0.13
15.4
0.012 j+
<0.08
0.12
<0.5
0.15
0.5 j+
439
0.15
NA
1.15
85
0.00134 j+
<0.5
<0.5
NA
6.50E-02
<5
<0.5
NA
3.12 j
<0.1
SW-09
Unit 5 Inactive Basin
WS-IV
1760 Ml
<0.5
0.32
24
0.095 LB
<0.08
0.083 j,D3
2
0.66
2.1
2190
1.2
NA
1.34
74.4
0.00252
0.13 j
0.79
NA
0.18
<5
<0.5
NA
2.97 j
0.049 j
SW-09
Unit 5 Inactive Basin
WS-IV
319
<0.5
0.22 B
14.3
<0.1
<0.08
0.15
0.38 j
0.083 j
0.4 j
528
0.15
NA
1.29
25
0.000866
<0.5
<0.5
NA
0.12
<5
<0.5
NA
3.12 j
<0.1
SW-09
Unit 5 Inactive Basin
WS-IV
646
<0.5
<0.1
13.8
<0.1
<0.08
0.061
<0.5
0.14
0.56
896
0.22
<0.5
1.06
29.8
0.00114
<0.5
<0.5
NA
0.3
<5
<0.5
NA
<5
<0.1
SW-09
Unit 5 Inactive Basin
WS-IV
689
<0.5
0.097 j
15.2
<0.1
<0.08
0.056
0.22 j
0.14
0.34 j
941
0.21
0.45 j
1.14
32.7
0.00107
<0.5
<0.5
NA
0.14
<5
<0.5
NA
2.95 j
<0.1
SW-10A
Unit 5 Inactive Basin
WS-IV
222
<0.5
0.34
16.7
0.032 j+
<0.08
0.043
0.61 j+
0.43
0.5
446
0.19
NA
1.32
49.7
0.00117
0.75
0.47 j
NA
0.17
<5
<0.5
NA
3.56 j
0.028 j
SW-10A
Unit 5 Inactive Basin
WS-IV
252
1.5
17.5
44
0.048 j
<0.08
2.8
3.4
0.35
1
495
0.31
NA
3.6
54.1
0.00248
21.4
0.66
NA
0.35
2.59 j
5.6
NA
6.5
0.2
SW-10A
Unit 5 Inactive Basin
WS-IV
152
0.34 j
2.6
22.7
0.043 j+
<0.08
0.18 j
0.75 j+
0.34
0.74
474
0.36
NA
2.01
60.8
0.00147
3.8
0.54
NA
0.19
<5
0.62
NA
5.26
0.097 j
SW-10A
Unit 5 Inactive Basin
WS-IV
64.8 j
1.4
7.7
55
0.025 j
0.14
0.65
1.2
1.2
1.3
322
0.12
NA
3.34
111
0.00163
20.4
3.2
NA
0.36
2.56 j
3.2
NA
6.35
0.39
SW-10A
Unit 5 Inactive Basin
WS-IV
109
<0.5
0.12
14.1
0.024 j
<0.08
0.07 j,D3
0.4 j
0.13
0.5
464
0.15
NA
1.51
32.6
0.000887
<0.5
<0.5
NA
0.31
<5
<0.5
NA
4.09 j
<0.1
SW-10A
Unit 5 Inactive Basin
WS-IV
304
0.4 j
2.9
22.1
0.011 j
<0.08
0.34
0.79 j+
0.3
0.71 j+
503
0.37
NA
1.8
43.8
0.00113 j+
5.6
0.52
NA
0.1 j-
<5
0.84
NA
4.16 j
0.12 j+
SW-10A
Unit 5 Inactive Basin
WS-IV
634
0.11 j
0.41
19.2
0.038 j
<0.08
0.087 j,D3
1.2
0.55
2.2
984
0.7
NA
1.38
77.3
0.000945
0.34 j
0.86
NA
0.15
<5
<0.5
NA
3.22 j
0.033 j
SW-10A
Unit 5 Inactive Basin
WS-IV
190
<0.5
0.32 B
15.8
<0.1
<0.08
0.056 j,D3
0.24 j
0.28
0.55
428
0.14
NA
1.57
42.5
0.000855
0.42 j
0.46 j
NA
0.14
<5
<0.5
NA
3.33 j
0.065 j
SW-10A
Unit 5 Inactive Basin
WS-IV
403
<0.5
0.71
17.7
<0.1
<0.08
0.064 Ml
<0.5
0.38
0.79
596
0.15
1.9
1.66
51
0.00082
1.1
<0.5
NA
0.25
<5
<0.5
NA
<5
<0.1
SW-10A
Unit 5 Inactive Basin
WS-IV
628
<0.5
0.27
17.2
<0.1
<0.08
0.055
0.4 j
0.23
0.72
737
0.3
0.81
1.11
31.2
0.00101
0.27 j
0.28 j
NA
0.17
<5
<0.5
NA
2.79 j
0.031 j
SW-10B
Unit 5 Inactive Basin
WS-IV
270
<0.5
0.11
14.9
0.032 j+
<0.08
0.041
0.58 j+
0.2
0.49 j
475
0.21
NA
1.24
31.1
<0.0005
<0.5
<0.5
NA
0.17
<5
<0.5
NA
3.45 j
<0.1
SW-10B
Unit 5 Inactive Basin
WS-IV
350
<0.5
1.3
19.3
0.018 j
<0.08
0.036
0.73
0.34
0.97
939
0.56
NA
1.59
61.4
0.00217 j+
1.2
<0.5
NA
0.2
<5
0.44 j
NA
4.24 j
0.045 j
SW-10B
Unit 5 Inactive Basin
WS-IV
111
<0.5
0.23
15.2
0.014 j+
<0.08
<0.3
0.46 j+
0.26
0.56
460
0.39
NA
1.59
58.6
0.00132
0.13 j
<0.5
NA
0.14
<5
<0.5
NA
4.08 j
0.04 j
SW-10B
Unit 5 Inactive Basin
WS-IV
<100
<0.5
0.14
12.5
<0.1
<0.08
0.041 j,D3
0.8
0.14
0.36 j
430
0.12
NA
1.42
28.1
0.000646
0.13 j
<0.5
NA
0.27
<5
0.35 j
NA
4.34 j
<0.1
SW-10B
Unit 5 Inactive Basin
WS-IV
101
0.49 j
1.6
26.8
0.042 j
<0.08
0.11 j,D3
0.44 j
0.58
0.7
467
0.14
NA
2.07
80.9
0.000676
5.5
1
NA
0.42
<5
0.38 j
NA
5.65
0.1
SW-10B
Unit 5 Inactive Basin
WS-IV
250
0.11 j
0.26
14.4
<0.1
<0.08
0.11 j,D3
0.49 j+
0.15 j+
0.45 j+
486
0.18
NA
1.26
31.2
0.00122 j+
0.27 j
<0.5
NA
7.70E-02
<5
<0.5
NA
3.12 j
<0.1
SW-10B
Unit 5 Inactive Basin
WS-IV
978
<0.5
0.3
22.3
0.071 j
<0.08
0.1 j,D3
2.2
0.65
1.6
1480
0.95
NA
1.37
96.7
0.000807
0.22 j
1
NA
0.19
<5
<0.5
NA
3.06 j
0.073 j
SW-10B
Unit 5 Inactive Basin
WS-IV
490
<0.5
0.21 B
16
<0.1
<0.08
<0.12 D3
0.38 j
0.15
0.44 j
777
0.21
NA
1.25
38.2
0.000786
<0.5
<0.5
NA
0.12
<5
<0.5
NA
3.04 j
<0.1
SW-10B
Unit 5 Inactive Basin
WS-IV
437
<0.5
0.16
14.9
<0.1
<0.08
0.051
<0.5
0.18
<0.5
665
0.19
0.56
1.1
33.2
0.000791
<0.5
<0.5
NA
0.21
<5
<0.5
NA
<5
<0.1
SW-10B
Unit 5 Inactive Basin
WS-IV
1080
<0.5
0.16
19.8
<0.1
<0.08
0.047
0.78
0.34
0.63
1240
0.54
0.75
1.15
42.3
0.00121
<0.5
0.3 j
NA
0.18
<5
<0.5
NA
2.75 j
<0.1
SW-lOC
Unit 5 Inactive Basin
WS-IV
233
<0.5
0.12 j
15.9
0.041 j+
<0.08
0.029 j
0.66 j+
0.2 j
0.65
529
0.24 j
NA
1.47
32.9 j
0.000297 j
<0.5
<0.5
NA
0.27 j
<5
<0.5
NA
3.92 j
<0.1
SW-lOC
Unit 5 Inactive Basin
WS-IV
254
<0.5
0.16
15.4
<0.1
<0.08
0.29
0.4 j
0.19
0.6
596
0.38
NA
1.32
42.7
0.00181 j+
<0.5
<0.5
NA
0.16
<5
<0.5
NA
3.82 j
0.037 j
SW-lOC
Unit 5 Inactive Basin
WS-IV
114
<0.5
0.19
13.9
0.062 j+
<0.08
<0.15
0.45 j+
0.23
0.54
401
0.35
NA
1.45
54.5
0.00136
<0.5
<0.5
NA
0.12
<5
<0.5
NA
3.78 j
0.019 j
SW-lOC
Unit 5 Inactive Basin
WS-IV
57.6 j
<0.5
0.15
12.8
0.017 j
<0.08
<0.12 D3
0.33 j
0.13
0.38 j
468
0.13
NA
1.42
30.2
0.000626
<0.5
<0.5
NA
0.28
<5
<0.5
NA
4.39 j
0.033 j
SW-lOC
Unit 5 Inactive Basin
WS-IV
127
<0.5
0.12
13.5
<0.1
<0.08
0.093 j,D3
0.44 j
0.12
0.5 j
437
0.13
NA
1.46
29.4
0.000813
<0.5
<0.5
NA
0.29
<5
<0.5
NA
3.95 j
<0.1
SW-lOC
Unit 5 Inactive Basin
WS-IV
400
0.11 j
0.16
14.8
0.019 j
<0.08
0.09 j,D3
0.5 j+
0.23
0.62 j+
669
0.33
NA
1.29
36.3
0.00102 j+
<0.5
<0.5
NA
8.40E-02
<5
<0.5
NA
3.16 j
<0.1
SW-lOC
Unit 5 Inactive Basin
WS-IV
1160
<0.5
0.27
23.5
0.093 j
0.054 j
0.094 j,133
1.9
0.74
1.7
1740
1.1
NA
1.43
102
0.00108
0.15 j
0.68
NA
0.23
<5
<0.5
NA
3.16 j
0.091 j
SW-lOC
Unit 5 Inactive Basin
WS-IV
215
<0.5
0.21 B
14.4
<0.1
<0.08
0.039
0.24 j
0.1
0.5 j
512
0.14
NA
1.47
28.2
0.000725
<0.5
<0.5
NA
0.16
<5
<0.5
NA
3.43 j
<0.1
SW-lOC
Unit 5 Inactive Basin
WS-IV
469
<0.5
<0.1
16
<0.1
<0.08
0.033
<0.5
0.12
<0.5
823
0.16
<0.5
1.27
33.5
0.00107
<0.5
<0.5
NA
0.25
<5
<0.5
NA
<5
<0.1
SW-lOC
Unit 5 Inactive Basin
WS-IV
1160
<0.5
0.14
22.6
<0.1
<0.08
0.035
0.3 j
0.25
0.59
1480
0.43
0.37 j
1.4
44.3
0.00137
<0.5
0.18 j
NA
0.26
<5
<0.5
NA
3.07 j
<0.1
SW-BR-01
Unit 5 Inactive Basin
WS-IV
319
<0.5
0.18
14.3
0.034 j
<0.08
0.046
0.8
0.19
0.39 j,B
524
0.29
NA
1.29
30.6
<0.2
<0.5
<0.5
NA
0.12
<5
<0.5
NA
3.42 j
<0.1
SW-BR-01
Unit 5 Inactive Basin
WS-IV
1070
<0.5
0.18
19.5
0.069 j
<0.08
0.29 Ml,Sl
2.2 B,Sl
0.51
2.1
1370
0.98
1.1 j
1.1
51.4
<0.2
<0.5
0.58
NA
0.21
<5
<0.5
NA
3.15 j
0.015 j
SW-BR-01
Unit 5 Inactive Basin
WS-IV
183
<0.5
0.14
16.9
<0.1
<0.08
0.059
0.38 j
0.27
0.57 B,BC
408
0.92
<2.5
1.13
50.8
<0.2
<0.5
<0.5
NA
0.15
1.2 j
<0.5
NA
2.95 j
<0.1
SW-BR-02
Unit 5 Inactive Basin
WS-IV
217
<0.5
0.17
12.5
0.038 j
<0.08
0.079
0.49 j
0.16
0.18 j,B
382
0.22
NA
1.32
27.1
<0.2
<0.5
<0.5
NA
0.12
<5
<0.5
NA
3.61 j
<0.1
SW-BR-02
Unit 5 Inactive Basin
WS-IV
727
<0.5
0.15
15.9
0.04 j
<0.08
0.24 Sl
1 B,Sl
0.31
0.63 Sl
861
0.46
0.77 j
1.03
33.4
<0.2
<0.5
<0.5
NA
0.22
<5
<0.5
NA
2.95 j
<0.1
SW-BR-02
Unit 5 Inactive Basin
WS-IV
386
<0.5
0.15
16.1
<0.1
<0.08
0.09
<0.5
0.25
0.52 B,BC
600
0.33
<2.5
1.14
45.9
<0.2
<0.5
<0.5
NA
0.15
1.17 j
<0.5
NA
2.92 j
<0.1
Page 22 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Tin
Titanium
Vanadium
Zinc
Aluminum
(0.45u)
Antimony
(0.45u)
Arsenic
(0.45u)
Barium
(0.45u)
Beryllium
(0.45u)
Boron
(0.45u)
Cadmium
(0.45u)
Calcium
(0.45u)
Chromium
(0.45u)
Cobalt
(0.45u)
Copper
(0.45u)
Iron
(0.45u)
Lead
(0.45u)
Lithium
(0.45u)
Magnesium
(0.45u)
Manganese
(0.45u)
Mercury
(0.45u)
Molybdenum
(0.45u)
Nickel
(0.45u)
Phosphorus
(0.45u)
Reporting Units
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
150
NE
6.5
NE
0.15
NE
24
NE
2.7
NE
0.54
NE
NE
NE
NE
NE
16
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
I NE
NE
NE
NE
NE
I NE
NE
NE NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.95
<10
<100
<0.5
1.4
20.4
<0.1
<50
<0.08
NA
0.53 j+
0.071 j
0.81 j+
95.8
<0.1
NA
NA
19.5
NA
0.31 j
1.3
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.32
<10
<100
<0.5
1.1 j+
21.9
<0.1
<50
<0.08
NA
0.33 j+
0.084 j
0.67 j+
115
<0.1
NA
NA
6.7
NA
0.38 j
1.9
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.16 j
<10
<100
<0.5
0.46
22.5
<0.1
<50
<0.08
NA
0.22 j
0.051 j
0.76
57.8
<0.1
NA
NA
<5
NA
<0.5
1.7
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
0.19 j
2.5 j+
<100
<0.5
0.34
27
0.041 j
<50
<0.08
NA
0.094 j
0.08 j
0.98
55.4
<0.1
NA
NA
<5
NA
0.12 j
1.7
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<0.3
10.7
<100
<0.5
0.56
18.7
<0.1
<50
<0.08
NA
<0.5
0.073 j
10.4
167
1.1
NA
NA
3.6 j
NA
0.23 j
1.3
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
5.2 j
<100
<0.5
<0.5
38
0.068 j
<50
<0.08
NA
0.27 j
1.1
0.44 j
83
<0.1
NA
NA
120
0.1 j
<0.5
1.6
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.64
<10
<100
<0.5
0.091 j
11.2
<0.1
<50
<0.08
NA
0.73
0.069 j
1.6
66.9
<0.1
NA
NA
10.6
NA
<0.5
1.4
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.92
<10
<100
<0.5
0.27 j+
12.8
0.024 j
<50
<0.08
NA
0.29 j+
0.081 j
1 j+
41.6 j
<0.1
NA
NA
23.1
NA
<0.5
1.4
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.7
3.5 j
<100
<0.5
0.12
10.7
<0.1
<50
<0.08
NA
0.2 j
0.037 j
0.34 j
61.5
<0.1
NA
NA
10.9
NA
<0.5
<0.5
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.43
<10
<100
<0.5
0.095 j
12.3
<0.1
<50
<0.08
NA
0.15 j
0.052 j
0.37 j
69.8
<0.1
NA
NA
15
NA
<0.5
<0.5
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.61
<10
<100
<0.5
0.077 j
13.5
0.012 j
<50
<0.08
NA
<0.5
0.097 j
2 j
64.2
0.19 j
NA
NA
66.3
NA
<0.5
<0.5
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
5.5
3.5 j
<100
<0.5
0.11
15.1
0.023 j
<50
<0.08
NA
0.18 j
0.041 j
0.8
31.9 j
<0.1
NA
NA
7.2
NA
<0.5
<0.5
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.76 B
<10
<100
<0.5
0.08 j
9.9
<0.1
<50
<0.08
NA
0.36 j
0.04 j
0.67
71.2
0.044 j
NA
NA
7.6
NA
<0.5
0.16 j
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.49
<10
<100
<0.5
0.12
12
<0.1
<50
<0.08
NA
<0.5
<0.1
<0.5
278
<0.1
NA
NA
13.9
NA
<0.5
<0.5
<0.05
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
0.76
<10
<100
<0.5
0.11
10.8
<0.1
<50
<0.08
NA
0.13 j
0.048 j
0.51 B
27.3 j
0.044 j
NA
NA
8.5
NA
<0.5
<0.5
<0.05
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
1
2.5 j+
<100
0.1 j
0.27
13.4
<0.1
<50
<0.08
NA
0.59 j+
0.29
1.5
53.8
0.092 j
NA
NA
30.2
NA
0.8
1.3
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
20
<10
157
1.5
16.1
43.2
0.029 j+
460
<0.08
NA
2.9
0.32
1.5
312
0.32
NA
NA
51.3
NA
19
0.89
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
3.4
<10
<100
0.31 j
2 j+
21.7
0.019 j
100
<0.08
NA
0.4 j+
0.099 j
0.9 j+
<50
<0.1
NA
NA
28.1
NA
4.2
0.47 j
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
4.9
8.1 j
<100
1.3
5.8
55.3
0.011 j
499
0.079 j
NA
0.86
1.1
0.87
34.5 j
<0.1
NA
NA
115
NA
19.2
2.9
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
0.47
3.1 j
<100
<0.5
0.094 j
12.5
0.025 j
<50
<0.08
NA
0.25 j
0.071 j
0.38 j
93.8
<0.1
NA
NA
23.9
NA
<0.5
<0.5
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
2.6
<10
<100
0.42 j
2.6
20.1
<0.1
200
<0.08
NA
0.51 j+
0.12
9.4
34.8 j
1.1
NA
NA
22.9
NA
5.8
0.45 j
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
3.2
12.4
<100
<0.5
0.29
12.2
0.012 j
26.5 j
<0.08
NA
0.35 j
0.038 j
0.97
28.3 j
<0.1
NA
NA
9.7
NA
0.34 j
<0.5
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
0.69 B
<10
<100
<0.5
0.13
11.6
<0.1
64
<0.08
NA
0.25 j
0.19
0.43 j
92.9
0.044 j
NA
NA
30.2
NA
0.47 j
0.38 j
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
0.57
<10
<100
<0.5
0.59
13.6
<0.1
189
<0.08
NA
<0.5
0.3
<0.5 B
54.9
<0.1
NA
NA
30.1
NA
1.2
<0.5
<0.05
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
0.96
<10
<100
<0.5
0.17
11.8
<0.1
<50
<0.08
NA
<0.5
0.12
0.56
57.5 B,lg
0.034 j
NA
NA
11.1
NA
0.3 j
0.29 j
<0.05
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
1
<10
<100
<0.5
0.094 j
11.6
<0.1
<50
<0.08
NA
0.66 j+
0.09 j
3.8
43.3 j
0.35
NA
NA
13.1
NA
<0.5
1.5
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
3
<10
<100
0.13 j
0.54
14.7
0.017 j+
<50
<0.08
NA
<0.5
0.06 j
3.8
<50
0.14
NA
NA
15.8
NA
0.64
0.55
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
1.4
2.9 j+
<100
<0.5
0.24 j+
13.4
0.015 j
<50
<0.08
NA
0.25 j+
0.057 j
0.87 j+
<50
<0.1
NA
NA
18.3
NA
0.15 j
<0.5
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
0.5
4.4 j
<100
<0.5
0.13
12
<0.1
<50
<0.08
NA
0.71
0.13
0.62
120
<0.1
NA
NA
25.1
NA
0.17 j
1.8
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
0.95
2.8 j
<100
0.45 j
1.2
24.3
0.025 j
99.4
<0.08
NA
0.3 j
0.48
1.7
83.6
1 0.16
NA
NA
74.9
NA
5.2
1.1
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
1.1 j+
<10
<100
<0.5
0.2
12.2
<0.1
<50
<0.08
NA
0.37 j+
0.059 j
8.8
67.9
1.1
NA
NA
15.9
NA
0.3 j
<0.5
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
4.1
5.8 j
<100
<0.5
0.12
11.7
<0.1
<50
<0.08
NA
0.17 j
0.036 j
0.75
34.6 j
<0.1
NA
NA
8.2
NA
<0.5
<0.5
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
0.81 B
<10
51.7 j
<0.5
0.12
9.9
<0.1
<50
<0.08
NA
0.27 j
0.081 j
0.46 j
137
0.14
NA
NA
15
NA
<0.5
0.44 j
NA
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
0.63
<10
<100
<0.5
0.24
11.3
<0.1
62.5
<0.08
NA
<0.5
0.13
<0.5 B
74.9
<0.1
NA
NA
15.9
NA
<0.5
<0.5
<0.05
SW-10B
Unit 5 Inactive Basin
WS-IV
NA
NA
1.9
2.6 j
<100
<0.5
0.066 j
10.9
<0.1
<50
<0.08
NA
0.2 j
0.052 j
0.68
58.6 B,lg
0.034 j
NA
NA
7.4
NA
<0.5
0.2 j
<0.05
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
1.1
3.4 j+
<100
0.14 j
0.11 j
12.7
<0.1
<50
<0.08
NA
0.43 j+
0.087 j
3.4 j
44.7 j
<0.1
NA
NA
17.8 j
NA
<0.5
0.99
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
1.3
<10
<100
<0.5
0.11
12.5
0.017 j+
<50
<0.08
NA
0.1 j+
0.033 j+
1.7
<50
<0.1
NA
NA
8.2
NA
<0.5
<0.5
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
1.3
<10
<100
<0.5
0.21 j+
13
0.021 j
<50
<0.08
NA
0.28 j+
0.052 j
0.83 j+
<50
<0.1
NA
NA
18.9
NA
<0.5
<0.5
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
0.6
3.1 j
<100
<0.5
0.098 j
11.9
<0.1
<50
<0.08
NA
0.27 j
0.083 j
0.62
99.2
<0.1
NA
NA
24.4
NA
<0.5
<0.5
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
0.56
3.2 j
<100
<0.5
0.094 j
11.8
<0.1
<50
<0.08
NA
0.27 j
0.06 j
0.52
99
<0.1
NA
NA
21.3
NA
<0.5
0.7
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
1.5
<10
<100
<0.5
0.15
12.2
0.026 j
<50
<0.08
NA
0.19 j+
0.065 j
6.8
78.1
0.91
NA
NA
15.3
NA
<0.5
<0.5
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
4.4
6 j
<100
<0.5
0.12
11.9
<0.1
<50
<0.08
NA
0.13 j
0.029 j
0.67
33.2 j
<0.1
NA
NA
9.5
NA
<0.5
<0.5
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
0.74 B
<10
<100
<0.5
0.13
10.6
<0.1
<50
<0.08
NA
0.14 j
0.077 j
0.41 j
137
0.059 j
NA
NA
17.6
NA
<0.5
0.15 j
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
0.46
<10
<100
<0.5
<0.1
10.8
<0.1
<50
<0.08
NA
<0.5
<0.1
<0.5 B
104
<0.1
NA
NA
11.2
NA
<0.5
<0.5
<0.05
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
1.2
2.7 j
<100
<0.5
0.066 j
13.7
<0.1
<50
<0.08
NA
0.13 j
0.084 j
0.67
46 j,B,lg
<0.1
NA
NA
13.3
NA
<0.5
0.98
<0.05
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
NA
1.6
<10 P8
<100
<0.5
0.11
14.7
0.011 j
<50
<0.08
NA
0.26 j
0.029 j
<0.5
48.9 j
<0.1
NA
NA
10.1
<0.2
<0.5
<0.5
NA
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
NA
2.7
29.7
62.9 j
<0.5
0.084 j
10.9
<0.1
<50
<0.08
NA
0.93
0.071 j,BC
0.56 B,S1
84.2
0.096 j
NA
NA
8.2
<0.2
<0.5
0.62
0.026 j
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
NA
1.3 B,BC
<10
61.1 j
<0.5
0.13
11.4
<0.1
<50
<0.08
NA
<0.5
0.085 j
0.92
104
0.13
NA
NA
14.5
<0.2
<0.5
1.3
<0.05
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
NA
1.2 B
<10 P8
<100
<0.5
0.1
17.4
0.012 j
<50
<0.08
NA
0.17 j
0.08 j
2.5
142
0.091 j
NA
NA
22.3
<0.2
0.17 j
<0.5
NA
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
NA
1.8
3.2 j
<100
<0.5
0.087 j
16
<0.1
<50
<0.08
NA
0.42 j
0.067 j,BC
10.32 j,B,Sll
83.8
1 <0.1
I NA
I NA
1 15.9
1 <0.2
1 <0.5
1 <0.5
1 0.027 j
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
NA
1.2 B,BC
110
<100
<0.5
0.13
11.3
<0.1
<50
<0.08
NA
<0.5
<0.1
0.56
79.7
<0.1
NA
NA
8.9
<0.2
<0.5
<0.5
<0.05
Page 23 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
SPECIATIONS
Potassium
(0.45u)
Selenium
(0.45u)
Silver
(0.45u)
Sodium
(0.45u)
Strontium
(0.45u)
Thallium
(0.45u)
Vanadium
(0.45u)
Zinc
(0.45u)
Radium-226
Radium-226
Arsenic (Speciation)
As(III)
As(V)
Cr(III)
Cr(VI)
DIS
Cr(VI)
Iron (Speciation)
Fe(II)
Fe(III)
Manganese
(Speciation)
DIS
Manganese
(Speciation)
Mn(II)
Mn(IV)
Se(IV)
Se(VI)
Reporting Units
mg/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
pCi/L
pCi/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
NE
36
NE
NE
NE
NE
NE
24
11
11
NE
NE
NE
NE
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
31.6
<0.1
0.62
<10
NA
NA
NA
NA
NA
NA
NA
0.022 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
34.9
0.026 j
0.22 j
2.8 j
NA
NA
NA
NA
NA
NA
NA
<0.15
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
32.6
0.023 j
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
0.049 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
31
0.089 j
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -OS
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
27.8
0.028 j
<0.3
20.5
NA
NA
NA
NA
NA
NA
NA
0.085
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
33
0.05 j
<1
5.9 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
18.8
<0.1
0.36
<10
NA
NA
NA
NA
NA
NA
NA
0.042
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
26.6
<0.1
0.5
<10
NA
NA
NA
NA
NA
NA
NA
<0.3
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
0.31 j
NA
NA
24.3
<0.1
0.17 j
<10
NA
NA
NA
NA
NA
NA
NA
0.068 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
25.5
<0.1
0.16 j
<10
NA
NA
NA
NA
NA
NA
NA
0.074 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
25.4
<0.1
0.13 j
2.6 j
NA
NA
NA
NA
NA
NA
NA
0.12 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
21
0.036 j
0.86
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
20.2
<0.1
0.28 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
18.9
<0.1
0.53
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
18.6
<0.1
0.87 B
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
32.3
<0.1
0.44
3.5 j
NA
NA
NA
NA
NA
NA
NA
0.043
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
4.9
NA
NA
153
0.18
18
5.1 j
NA
NA
NA
NA
NA
NA
NA
2.8
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
0.7
NA
NA
70.5
0.07 j
2
<10
NA
NA
NA
NA
NA
NA
NA
0.18 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
2.8
NA
NA
150
0.38
3.8
3.5 j
NA
NA
NA
NA
NA
NA
NA
0.65
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
26.2
0.015 j
0.31
<10
NA
NA
NA
NA
NA
NA
NA
0.07 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
0.71
NA
NA
63.4
0.1
1.8
11
NA
NA
NA
NA
NA
NA
NA
0.34
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
29.1
0.042 j
0.83
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
31.8
0.065 j
0.41
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
44.4
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
23.5
<0.1
0.45
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
20.1
<0.1
0.49
4.3 j
NA
NA
NA
NA
NA
NA
NA
0.041
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
26.9
0.031 j
0.97
5.2 j
NA
NA
NA
NA
NA
NA
NA
0.036
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
28.4
<0.1
0.56
<10
NA
NA
NA
NA
NA
NA
NA
<0.3
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
26.4
<0.1
0.25 j
4 j
NA
NA
NA
NA
NA
NA
NA
0.041 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
0.51
NA
NA
82.8
0.096 j
0.55
<10
NA
NA
NA
NA
NA
NA
NA
0.11 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
0.33 j
NA
NA
23.8
<0.1
0.54
16.1
NA
NA
NA
NA
NA
NA
NA
0.11 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
24.9
<0.1
0.74
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
20.5
<0.1
0.42
2.8 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
26.3
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
17.8
<0.1
0.48
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
21.8 j
<0.1
0.52
3.8 j
NA
NA
NA
NA
NA
NA
NA
0.029 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
22
0.027 j
0.54
<10
NA
NA
NA
NA
NA
NA
NA
0.29
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
27.1
<0.1
0.53
<10
NA
NA
NA
NA
NA
NA
NA
<0.15
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
26.1
<0.1
0.23 j
<10
NA
NA
NA
NA
NA
NA
NA
<0.12
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
25.5
<0.1
0.25 j
<10
NA
NA
NA
NA
NA
NA
NA
0.093 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
22.6
<0.1
0.65
9.4 j
NA
NA
NA
NA
NA
NA
NA
0.09 j+
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
25.2
<0.1
0.76
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
22.2
<0.1
0.45
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
19.7
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
sW-10C
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
20.2
<0.1
0.44
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
25.9
<0.1
0.38
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
16.2
<0.1
0.45 SI
9.9 j
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
20
<0.1
0.77 BC
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
25.8
<0.1
0.54
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
17.8
<0.1
0.39 SI
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
20.1
<0.1
0.73 BC
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Page 24 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
OTHER PARAMETERS
BOD
Bromide
Carbonate Alkalinity
COD
Fluoride
Hardness
Nitrate
Nitrogen, Kjeldahl, total
Oil and grease
Phosphate
Phosphorus
Reporting Units
mg/L
ug/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
1.8
100
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -OS
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-09
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-10A
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW -SOB
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
0.034 j
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<1
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-10C
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
0.025 j
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
0.046 j
SW-BR-01
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
0.14
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
0.0411
SW-BR-02
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
Page 25 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
yt
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
pH
Temperature
Specific
Conductance
Dissolved
Oxygen
Oxidation
Reduction
Potential
Eh
Turbidity
Flow
Alkalinity
Bicarbonate
Alkalinity
Methane
Sulfide
Total
Organic
Carbon
Total
Suspended
Solids
Boron
Calcium
Chloride
Strontium
Sulfate
Total
Dissolved
Solids
Reporting Units
S.U.
Deg C
umhos/cm
mg/L
mV
mV
NTUs
GPM
mg/L
mg/L
ug/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
ug/L
mg/L
mg/L
15A NCAC 02B (Class C, WS-IV)
6.0-9.0
32
NE
4
NE
NE
25
NE
NE
NE
NE
NE
NE
NE
NE
NE
250
NE
250
500
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
5.2-64.2
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BR-03
Unit 5 Inactive Basin
WS-IV
7.1
20
49
7.10
147
352
7.1
NM
16.5
16.5
10
<0.1
0.96 j
5.6
<50
3.61
2
23
1.6
33
SW-BR-03
Unit 5 Inactive Basin
WS-IV
6.3
12
46
8.10
110
315
27.2
NM
11.1
11.1
NA
<0.1
1.1
11.2
<50
2.68
2.8
18.5
2
34
SW-BR-03
Unit 5 Inactive Basin
WS-IV
6.8
28
55
4.20
42
247
9.8
NM
12.5
12.5
NA
<0.1
0.96 j
8.1
6.8 j
2.94
2.1
22.3
1.5
33
SUCK CREEK
---
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
10.1
10.1
3.4 j
<0.1
NA
<2.5
34.7 j
4.11
5.3
27
4.9
<25
DOWNSTREAM OF DISCHARGE
---
WS-IV
NM
NM
NM
NM
NM
NM
NM
NM
25.5
25.5
3 j
<0.1
NA
2.8
673
40
54.1
254
40.9
109
QC SAMPLE RESULTS
FIELD PARAMETERS
WATER QUALITY PARAMETERS
SELECTED 40CFR257 APPENDIX III CONSTITUENTS plus Sr
SC 2 UP DUP
Active Ash Basin
WS-IV
6.9
19
69
7.71
244
449
18.5
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC_2_UP
Active Ash Basin
WS-IV
6.9
28
51
4.52
185
390
12.6
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC_2_UP
Active Ash Basin
WS-IV
6.9
21
60
5.75
122
327
17.6
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC_2_UP
Active Ash Basin
WS-IV
7.9
7
48
6.12
256
461
13.6
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC_2_UP
Active Ash Basin
WS-IV
7.3
30
58
5.40
252
457
21.3
NM
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 DUP
Active Ash Basin
WS-IV
6.8
24
69
4.30
138
343
7.7
NM
12.2
12.2
NA
<0.1
2.3
2.9
<50
2.83
3.9
18.6
1.3
46
SW-03 DUP
---
WS-IV
7.1
17
69
8.20
98
303
9.4
NM
10.2
10.2
NA
<0.1
1.8
3.9
<50
3.43
3.9
22.9
1 3.9
48
SW-04 DUP
Active Ash Basin
WS-IV
7.6
9
69
10.80
74
279
4.1
NM
11.2
11.2
NA
<0.1
1.3
<2.5
32.5 j
3.66
5.5
22.3
3.1
45
SW-04 DUP
Active Ash Basin
WS-IV
6.9
6
52
11.30
97
302
4.6
NM
9.8
9.8
NA
<0.1
1.4
<5
<50
3.04
4.5
20.9
3.2
36
SW-BRU14-03 (2) DUP
Former Units 1-4 basin
WS-IV
7.0
5
51
11.00
191
396
6.2
NM
14.5
14.5
<10 N2
NA
0.54 j
<2.7
<25
3.87
2.4
27.1
2.3
31
Page 26 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
(VI)
Chromium
Cobalt
Copper
Iron
Lead
Lithium
Magnesium
Manganese
Mercury
Molybdenum
Nickel
(itrate
N
as N)
Nitrate +
Nitrite
Potassium
Selenium
Silver
Sodium
Thallium
Reporting Units
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg-N/L
mg-N/L
mg/L
ug/L
ug/L
mg/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
10
1000
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
0.012
NE
25
NE
10
NE
5
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
69.2-1760
<0.1-<5 NE
NE
NE
NE
NE
NE
NE
NE
225-3630
NE
NE
NE
17.6-160
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BR-03
Unit 5 Inactive Basin
WS-IV
221
<0.5
0.15
12.7
0.0311
<0.08
0.037
0.99
0.14
0.28 j,B
363
0.21
NA
1.31
25.7
<0.2
<0.5
<0.5
NA
0.12
<5
<0.5
NA
3.52 j
<0.1
SW-BR-03
Unit 5 Inactive Basin
WS-IV
1540
<0.5
0.2
23.5
0.087 j
<0.08
0.099 SI
2.1 B,51
0.7
1.2 SI
2010
1
1.5 j
1.23
62
<0.2
<0.5
0.8
NA
0.22
<5
<0.5
NA
3.1 j
0.029 j
SW-BR-03
Unit 5 Inactive Basin
WS-IV
117
<0.5
0.14
14.6
<0.1
<0.08
0.032
<0.5
0.16
0.46 j,B,BC
295
0.22
<2.5
1.13
33.9
<0.2
<0.5
<0.5
NA
0.14
1.17 j
<0.5
NA
2.96 j
<0.1
SUCK CREEK
---
WS-IV
140
<0.5
0.22
1918
0.048 j
<0.08
NA
0.23 j
0.28
<0.5
1270
0.12
NA
1.65
45.9
0.00091
<0.5
<0.5
NA
0.38
<5
0.34 j
NA
2.92 j
<0.1
DOWNSTREAM OF DISCHARGE
---
WS-IV
229
1.8
12.6
75.2
0.059 j
0.17
NA
1.2
2.4
1.9
303
0.15
NA
4.31
254
0.00228
28.5
4
NA
0.24
3.7 j
4.3
NA
8.59
0.58
QC SAMPLE RESULTS
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
SC 2 UP DUP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.00118
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.000848
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.00176
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.00154
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
0.00165
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 DUP
Active Ash Basin
WS-IV
166
<0.5
0.4
22
0.02 j
<0.08
0.78
0.62
0.27
0.65
1210
0.39
NA
1.33
40.5
0.00168
<0.5
<0.5
NA
0.36
<5
<0.5
NA
2.54 j
0.033 j
SW-03 DUP
---
WS-IV
211
<0.5
0.24
23.9
0.045 j
<0.08
0.14
0.44 j
0.73
0.46 j
893
1 0.27
0.75
1.47
1 53
1 0.00165
<0.5
0.53
NA
0.43
<5
<0.5
1 NA
2.55 j
<0.1
SW-04 DUP
Active Ash Basin
WS-IV
<100
<0.5
0.26 B
21.9
<0.1
<0.08
0.032
0.53
0.22
0.49 j
727
0.21
NA
1.68
29.8
0.00298
<0.5
0.3 j
NA
0.33
<5
<0.5
NA
3.33
SW-04 DUP
Active Ash Basin
WS-IV
150
<0.5
0.14
22
<0.1
<0.08
1 <0.025
<0.5
0.31
<0.5
733
0.14
0.68
1.38
40.4
0.00127
<0.5
<0.5
NA
0.47
<5
<0.5
NA
<5
<0.1
SW-BRU14-03 (2) DUP
Former Units 1-4 basin
WS-IV
130
<0.1
0.22
13.1
0.021 j
<0.05
1 0.084 j,D3
0.5 j
0.2
0.37 j
398
0.15
NA
1.36
40.5
0.000675 B
<0.11
<0.44
NA
0.26
<2.5
<0.31
<0.07
3.561
0.0481
Page 27 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
Tin
Titanium
Vanadium
Zinc
Aluminum
(0.45u)
Antimony
(0.45u)
Arsenic
(0.45u)
Barium
(0.45u)
Beryllium
(0.45u)
Boron
(0.45u)
Cadmium
(0.45u)
Calcium
(0.45u)
Chromium
(0.45u)
Cobalt
(0.45u)
Copper
(0.45u)
Iron
(0.45u)
Lead
(0.45u)
Lithium
(0.45u)
Magnesium
(0.45u)
Manganese
(0.45u)
Mercury
(0.45u)
Molybdenum
(0.45u)
Nickel
(0.45u)
Phosphorus
(0.45u)
Reporting Units
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
150
NE
6.5
NE
0.15
NE
24
NE
2.7
NE
0.54
NE
NE
NE
NE
NE
16
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
I NE
I NE
I NE
I NE
I NE
I NE
I NE NE
I NE
I NE
I NE
I NE
I NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
NA
1.2 B
3 j,P8
66.2 j
<0.5
0.12
16.5
0.023 j
<50
<0.08
NA
0.25 j
0.0911
0.18 j
184
0.11
NA
NA
21.2
<0.2
<0.5
<0.5
NA
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
NA
3.7
6.3 j
79.8 j
<0.5
0.093 j
11.2
0.013 j
<50
<0.08
NA
0.42 j
0.064 j,BC
0.92 B,S1
92.6
<0.1
NA
NA
10.2
<0.2
<0.5
<0.5
0.027 j
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
NA
1 B,BC
<10
52.2 j
<0.5
0.13
11.7
<0.1
<50
<0.08
NA
<0.5
0.059 j
0.49 j
104
0.067 j
NA
NA
13
<0.2
<0.5
0.43 j
<0.05
SUCK CREEK
---
WS-IV
NA
NA
0.38
<10
<100
<0.5
0.12
18.5
0.027 j
47.3 j
<0.08
NA
<0.5
0.24
<0.5
99.1
<0.1
NA
1.67
40
NA
<0.5
<0.5
NA
DOWNSTREAM OF DISCHARGE
---
WS-IV
NA
NA
7.3
6.8 j
<100
1
6.3
46.7
0.023 j
400
0.074 j
NA
0.79
0.8
1.1
<50
<0.1
NA
2.89
86.6
NA
17
3.4
NA
QC SAMPLE RESULTS
INORGANIC PARAMETERS (TOTAL CONCENTRATION)
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
SC 2 UP DUP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 DUP
Active Ash Basin
WS-IV
NA
NA
0.96
<10
<100
<0.5
0.22
18.4
<0.1
<50
<0.08
NA
0.26 j
0.17
0.53
133
<0.1
NA
NA
31.1
NA
<0.5
<0.5
NA
SW-03 DUP
---
WS-IV
NA
NA
0.65
<10
<100
<0.5
0.18
22.1
<0.1
<50
<0.08
NA
0.26j
0.56
0.64
262
0.074 j,6
NA
I NA
43.2
NA
<0.5
1 0.45j
1 <0.05
SW-04 DUP
Active Ash Basin
WS-IV
NA
NA
0.42 B
<10
53.8 j
<0.5
0.21
20
<0.1
35.8 j
<0.08
NA
0.2 j
0.24
0.53
685
<0.1
NA
NA
27.8
NA
<0.5
0.39 j
NA
SW-04 DUP
Active Ash Basin
WS-IV
NA
NA
0.31
<10
<100
<0.5
0.14
20.4
<0.1
<50
<0.08
NA
<0.5
0.25
<0.5
302
<0.1
NA
NA
32
NA
<0.5
<0.5
<0.05
SW-BRU14-03 (2) DUP
Former Units 1-4 basin
WS-IV
NA
NA
0.85 B
6.4 j,B
<50
<0.1
0.19
12.3
0.013 j
<25
<0.05
3.71
0.2 j
0.14
0.62
43 j
<0.09
NA
1.35
32.9
0.000872 B
<0.11
<0.44
NA
Page 28 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
SPECIATIONS
Potassium
(0.45u)
Selenium
(0.45u)
Silver
(0.45u)
Sodium
(0.45u)
Strontium
(0.45u)
Thallium
(0.45u)
Vanadium
(0.45u)
Zinc
(0.45u)
Radium-226
Radium-226
Arsenic (Speciation)
As(III)
As(V)
Cr(III)
Cr(VI)
DIS
Cr(VI)
Iron (Speciation)
Fe(II)
Fe(III)
Manganese
(Speciation)
DIS
Manganese
(Speciation)
Mn(II)
Mn(IV)
Se(IV)
Se(VI)
Reporting Units
mg/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
pCi/L
pCi/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
NE
NE
NE
36
NE
NE
NE
NE
NE
24
11
11
NE
NE
NE
NE
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
25.9
<0.1
0.64
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
15.4
<0.1
0.46 SI
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
<0.5
NA
NA
20.2
<0.1
0.78 BC
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SUCK CREEK
---
WS-IV
<5
<0.5
NA
NA
25.4
<0.1
0.16 j
<10
0.0731
0.705
NA
NA
NA
NA
NA
0.8
NA
NA
NA
NA
NA
NA
NA
NA
NA
DOWNSTREAM OF DISCHARGE
---
WS-IV
2.57 j
2.5
NA
NA
147
0.3
3.5
<10
0.156
1.31
NA
NA
NA
NA
NA
1
NA
NA
NA
NA
NA
NA
NA
NA
NA
QC SAMPLE RESULTS
INORGANIC PARAMETERS (DISSOLVED CONCENTRATION WITH FILTER SIZE)
RADIONUCLIDES
SPECIATIONS
SC 2 UP DUP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2-UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 DUP
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
17
0.021 j
0.22 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-03 DUP
---
WS-IV
NA
<0.5
NA
NA
21.2
<0.1
0.29 j,B
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04 DUP
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
20.8
<0.1
0.2 j
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-04 DUP
Active Ash Basin
WS-IV
NA
<0.5
NA
NA
18.8
<0.1
<0.3
<10
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-BRU14-03 (2) DUP
Former Units 1-4 basin
WS-IV
<2.5
<0.31
<0.07
3.49 j
25.8
0.038 j
0.16 j
<2.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Page 29 of 33

APPENDIX B, TABLE 9
SURFACE WATER ANALYTICAL RESULTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Analytical Parameter
OTHER PARAMETERS
BOD
Bromide
Carbonate Alkalinity
COD
Fluoride
Hardness
Nitrate
Nitrogen, Kjeldahl, total
Oil and grease
Phosphate
Phosphorus
Reporting Units
mg/L
ug/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
15A NCAC 02B (Class C, WS-IV)
NE
NE
NE
NE
1.8
100
NE
NE
NE
NE
NE
USEPA National Recommended Water Quality Criteria Background Range
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
NE
Sample ID
Source Area Surace Water
Classification
Analytical Results
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
0.036 j
SW-BR-03
Unit 5 Inactive Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SUCK CREEK
---
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
DOWNSTREAM OF DISCHARGE
---
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
QC SAMPLE RESULTS
OTHER PARAMETERS
SC 2 UP DUP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2—UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2—UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2—UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
Hg Dup SC-2—UP
Active Ash Basin
WS-IV
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW-02 DUP
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-03 DUP
---
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-04 DUP
Active Ash Basin
WS-IV
NA
NA
<5
NA
NA
NA
NA
NA
NA
NA
NA
SW-04 DUP
Active Ash Basin
WS-IV
NA
NA
<5
NA
<0.1
NA
NA
NA
NA
NA
<0.05
SW-BRU14-03 (2) DUP
Former Units 1-4 basin
WS-IV
NA
NA
<1
NA
<0.05
14.3
NA
NA
NA
NA
NA
Page 30 of 33

APPENDIX B, TABLE 9
NOTES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
COLOR NOTES
Bold highlighted concentration indicates exceedance of the 15A NCAC 02L .0202 Standard or the IMAC. (Effective date for
15A NCAC 02L .0202 Standard and IMAC is April 1, 2013)
Bold highlighted concentration indicates exceedance of the Inactive Hazardous Sites Branch PSRG Table (May 2019) for
Industrial Health
Bold highlighted concentration indicates exceedance of the Inactive Hazardous Sites Branch PSRG Table (May 2019) for
Residential Health
Bold highlighted concentration indicates exceedance of the Inactive Hazardous Sites Branch PSRG Table (May 2019) for
Protection of Groundwater
Bold highlighted concentration indicates exceedance of the current respective standard or criteria [15A NCAC 02B (Class C,
WS-IV), NPDES permit value]. All hardness -dependent dissolved metal standards in this table assume <_ 25 mg/L in -stream
hardness.
Turbidity of Sample >_ 10 NTUs
Provisional Background Threshold Values reflect the values represented in the NCDEQ letter dated 10/11/2017.
Analytical data review has not been completed for this dataset.
ABBREVIATION NOTES
BGS - below ground surface
BOD - Biologic Oxygen Demand
CB - Compliance Boundary
COD - Chemical Oxygen Demand
Deg C - Degrees Celsius
DMAs - dimeth larsinic acid
DUP - Duplicate
Eh - Redox Potential
ft - Feet
GPM - gallons per minute
IMAC - Interim Maximum Allowable Concentrations. From the 15A NCAC 02L Standard Appendix 1 Aril 1 2013.
MDC - Minimum Detectable Concentration
McSe - Meth Iseleninic acid
m /k - milligrams per kilogram
m /L - milligrams per liter
m -N/L - Milligram nitrogen per liter
MMAs - monometh larsonic acid
mV - millivolts
NA - Not available or Not Applicable
NE - Not established
NM - Not measured
NTUs - Ne helometric Turbidity Units
Ci/L - picocuries per liter
PSRG - Primary Soil Remediation Goals
RL - Reporting Limit
SeCN - selnoc nante
SeMe IV - Selenomethionine
SPLP - Synthetic Precipitation Leaching Procedure
S.U. - Standard Units
TCLP - Toxicity Characteristic Leaching Procedure
u /L - micrograms per liter
u /mL - microgram per milliliter
umhos cm - micromhos per centimenter
Well Locations referenced to NAD83 and elevations referenced to NAVD88
LABORATORY FLAGS
< - concentration not detected at or above the adjusted reporting limit.
^ - Federal MCL.
* - Interim Maximum Allowable Concentrations IMACs of the 15A NCAC 02L Standard Appendix 1 April 1 2013.
AB - Anal to was detected in the associated instrument blank.
1 - Result confirmed by second analysis performed out of hold.
2 - The concentration in the Blank QC is less than the reporting limit but greater than 1/2 the reporting limit.
B - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less
than 1OX the concentration in the method blank. Anal to concentration in sample could be due to blank contamination.
Page 31 of 33

APPENDIX B, TABLE 9
NOTES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
LABORATORY FLAGS CONTINUED
B1 - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample was
greater than 10X the concentration in the method blank. Analyte concentration in sample is not affected by blank
contamination.
B2 - Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the
reportinq limit. Analyte concentration in sample is valid and may be used for compliance purposes.
B3 - Target analyte was detected in Continuing Calibration Blank(s) at a concentration greater than 1/2 the reporting limit
but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes.
B4 - Target analyte was detected in Continuing Calibration Blanks at or above the reporting limit.
B5 - Target analyte was present in blank(s) above the method detection limit but less than the reporting limit. Data is valid
for compliance purposes.
B6 - Target analyte was detected in Continuing Calibration Blanks at a concentration greater than the reporting limit.
BC - The same analyte was detected in an associated blank at a concentration above 1/2 the reporting limit but below the
laboratory reporting limit.
CC - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The result may be biased.
CH - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased
high.
CL - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased
low.
CR - The dissolved metal result was greater than the total metal result for this element. Results were confirmed by
reanalysis.
CU - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. Analyte presence below
reporting limits in associated samples. Results unaffected by high bias.
D3 - Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
D4 - Sample was diluted due to the presence of high levels of target analytes.
D6 - The precision between the sample and sample duplicate exceeded laboratory control limits.
E - Analyte concentration exceeded the calibration range. The reported result is estimated.
F5 - The recovery of the analyte in the CRDL standard (also known as the reporting limit verification) did not meet the
acce tance criteria.
H - Sample analyzed past the recommended holding time.
H1 - Analysis conducted outside the EPA method holding time.
H2 - Extraction of preparation conducted outside EPA method holding time.
H3 - Sample was received or analysis requested beyond the recognized method holding time.
H6 - Analysis initiated outside of the 15 minute EPA required holding time.
HS - Results are from sample aliquot taken from VOA vial with heads ace air bubble greater than 6 mm diameter).
- Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
Ll - Analyte recovery in the laboratory control sample (LCS) was above quality control (QC) limits. Results may be biased
high.
L2 - Analyte recovery in the laboratory control sample (LCS) was below QC limits. Results for this analyte in associated
samples may be biased low.
L3 - Analyte recovery in the laboratory control sample (LCS) exceeded quality control (QC) limits. Analyte presence below
reporting limits in associated samples. Results unaffected by high bias.
M - Matrix spike / matrix spike dup failure.
M1 - Matrix spike recovery was high: the associated Laboratory Control Spike LCS was acceptable.
M2 - Matrix spike recovery was Low: the associated Laboratory Control Spike LCS was acceptable.
M4 - The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike
level.
M6 - Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution.
N2 - The lab does not hold accreditation for this parameter.
ND - Not detected
P2 - Re -extraction or re -analysis could not be performed due to insufficient sample amount.
P4 - Sample field preservation does not meet EPA or method recommendations for this analysis.
P8 - Analyte was detected in the method blank. All associated samples had concentrations of at least ten times greater than
the blank or were below the reporting limit.
R1 - Relative Percent Difference (RPD) value was outside control limits.
U - Analyte was analyzed for but not detected above the MDC.
DATA VALIDATION FLAGS
j- - Estimated concentration, biased low.
j+ - Estimated concentration, biased high.
RO - The data are unusable. The sample results are rejected due to serious deficiencies in meeting QC criteria. The analyte
may or may not be present in the sample.
S - Associated calibration check did not meetspecified criteria.
S1 - Data review findings indicate result may be unreliable however, data is usable.
Page 32 of 33

APPENDIX B, TABLE 9
NOTES
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
POTENTIAL REASONS AN S1 FLAG IS ASSIGNED
There is contamination in field/equipment/trip blank(s) and the same analyte(s) are detected in the samples at
concentrations less than 10 times the blank concentration.
Radium is detected in the field/equipment/trip blank(s) at a concentration greater than the Minimum Detectable
Concentration (MDC) AND detected in the samples at concentrations greater than their MDC and less than 10x the blank
concentration.
The Relative Percent Difference RPD between the sample and its field duplicate is greater than 35%.
The dilution factor (DF) causes the Method Detection Limit (MDL) to be greater than the screening criteria (e.g. EPA Primary
MCL, NCAC 02L Groundwater Standard, IMAC, NCAC 02B Surface Water Standard, NC Soil -to -Water Maximum
Contamination Concentration) and the resulting sample concentration is reported as "ND" (non -detect). This applies to
reports where an MDL and RL are given by the lab such as Pace reports.
The dilution factor (DF) causes the Reporting Detection Limit (RDL) to be greater screening criteria (e.g. EPA Primary MCL,
NCAC 02L Groundwater Standard, IMAC, NCAC 02B Surface Water Standard, NC Soil -to -Water Maximum Contamination
Concentration) and the resulting sample concentration is reported as "<RDL". This applies to reports where only an RDL is
given by the lab.
Page 33 of 33

' ® CCR-IB-1S/D CLP-2 MW-20D/DR
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DUKE ENERGY CAROLINAS PROPERTY LINE
�� / `` `` F jf )► STREAM (AMEC NRTR)
fill'tip. n WETLANDS (AMEC NRTR)
NOTES:
GWA-24S/D/BR 1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND AREA MIX OF
. �•` SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE
GWA-45S/D GWA-27DA/D/BR \ DEEMED APPROXIMATE.
2. ASH THICKNESS ISOPACH SURFACES PROVIDED BYAECOM, INC. FINAL GRADING ASH
CUT/FILL THICKNESS FIGURE I, DATED AUGUST17,2018.
3. ISOPACHS DEPICTED HEREIN REPRESENT APPROXIMATE ASH THICKNESS. ISOPACHS
WERE DERIVED BY COMPARISON OF ELEVATIONS BETWEEN THE EXISTING TOP OF ASH
/ FROM THE 2015 TOPOGRAPHIC AND BATHYMETRIC SURVEY WITH PRE -DEVELOPMENT
TOPOGRAPHY BASED ON HISTORICAL USGS TOPOGRAPHY. NEGATIVE VALUES REPRESENT
AREAS WHERE HISTORICAL GRADES ARE TOPOGRAPHICALLY HIGHER THAN CURRENT
GRADES. THIS CONDITION REPRESENTS AREAS WHERE EXCAVATION HAS OCCURRED AND
AS -BUILT DATA IS NOTAVAILABLE.
Y i 4. ASH THICKNESS PRESENTED INCLUDES ASH STACKED ON TOP OF THE ACTIVE ASH
NMI / I T / AB-5S/BRU/BR ' ` BASIN.
1
' / l /��� �\ - 5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
• s US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
SUCK CREEK
_ - GWA-63S/BRU Z IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
t ' �/ 0 L _ `-. MW-22DR/BR WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
.. AB-6S/D/BR /� f^�� •^��'��` MW-226R
- w . GWA-47D rJ 6. NRTR - NATURAL RESOURCES TECHNICAL REPORT
'_, ` 7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
✓ _ CCR-16S/D f S. ALL BOUNDARIES ARE APPROXIMATE.
9. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON SEPTEMBER 7, 2018.
IMAGE COLLECTED ON APRIL 20, 2018.
10. DRAWING HAS BEEN SET WITH A PR
GWA-26S/D ® 1j� l
_. �. COORDINATE SYSTEM RIPS 3200 ( AD80JECTION OF NORTH AROLINA STATE PLANE
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DUKE 200 GRAPHIC SCALE200 400
FIGURE 1
- CLMW-6l ENERGY® ASH THICKNESS MAP
CAROLINAS (IN FEET) ACTIVE ASH BASIN
y� - Y`• hZ.� DRAWN BY: C. DAVIS DATE: 06/12/2019
REVISED BY: C. DAVIS DATE: 12/26/2019 CORRECTIVE ACTION PLAN UPDATE
CHECKED T.GRANT DATE:12/26/2019
APPROVED
DATE CLIFFSIDE STEAM STATION
- ,1 - - synTerra JECTMANAGER: MOORESBORo, PRO / / 019 NORTH CAROLINA
ti - - www.synterracorp.com

CCR-U5-2D �
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WASTE BOUNDARY 1
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High: 80
Low: 0
p
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OCRS/D CURRENT ASH BASIN WASTE BOUNDARY (SYNTERRA)
APPROXIMATE CLOSURE ASH BASIN
WASTE BOUNDARY (AECOM)
{ �r; a ' ''. ���' LANDFILL/ASH STORAGE AREA BOUNDARY
�." = c 1 _ "� \� 1 Z�` �� - - • DUKE ENERGY CAROLINAS PROPERTY LINE
, '� `� FY �1 \ NOTES:
��: = 1 1 I 1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF
SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE
TO BE DEEMED APPROXIMATE.
2. ASH THICKNESS ISOPACH SURFACES PROVIDED BYAECOM, INC. FINAL GRADING
/ •���` ASH CUT/FILL THICKNESS FIGURE 1, DATED AUGUST 17, 2018.
3. ISOPACHS DEPICTED HEREIN REPRESENT APPROXIMATE ASH THICKNESS.
ISOPACHS WERE DERIVED BY COMPARISON OF ELEVATIONS BETWEEN THE EXISTING
k� TOP OF ASH FROM THE 2015 TOPOGRAPHIC AND BATHYMETRIC SURVEY WITH PRE -
CCR-U5-4S/D
U5-5
1- \
CURRENT WASTE BOLIN
APPROXIMATE CLOSURE
WASTE BOUNDARY4,
GWA-30S/D/BRU/BR
MW-30S/D/DA
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MW-40S/BRU '
s
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/BRA/BR*�
DEVELOPMENT TOPOGRAPHY BASED ON HISTORICAL USGS TOPOGRAPHY.
NEGATIVE VALUES REPRESENT AREAS WHERE HISTORICAL GRADES ARE
\ TOPOGRAPHICALLY HIGHER THAN CURRENT GRADES. THIS CONDITION REPRESENTS
/)CCR-U5-10S/D AREAS WHERE EXCAVATION HAS OCCURRED AND AS -BUILT DATA IS NOT AVAILABLE.
�/ ® 4. ASH THICKNESS PRESENTED INCLUDES ASH STACKED ON TOP OF THE ACTIVE ASH
\�\\ BASIN.
U5-8S/D/BR 5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
- * ' 7 WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
6. NRTR - NATURAL RESOURCES TECHNICAL REPORT
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
8. ALL BOUNDARIES ARE APPROXIMATE.
♦ - - 9. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON SEPTEMBER 7,
2018. IMAGE COLLECTED ON APRIL 20, 2018.
10. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH AROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
DUKE
4' ENERGY®
150 GRAPHIC SCALE
300
CAROLINAS
(IN FEET)
DRAWN BY: C. DAVIS
REVISED BY:. DAVIS
DATE: 06/12/2019
DATE: 12/06/2019
CHECKED BY: T. GRANT
DATE: 12/06/2019
APPROVED BY: T. GRANT
DATE: 12/06/2019
PROJECT MANAGER: S. SPINNER
FIGURE 2
ASH THICKNESS MAP
UNIT 5 INACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
m