8505_DukeBelewsCreek_FGD_AdditionalGWAssessmentPhase1_DIN27858_20170531

Belews Creek Steam Station 3195 Pine Hall Road Belews Creek, NC 27009
336-445-0610
336-669-2994

May 31, 2017

North Carolina Department of Environmental Quality Division of Waste Management
Solid Waste Section
1646 Mail Service Center
Raleigh, North Carolina 28778
Attn: Ms. Elizabeth Werner
Re: Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station Flue Gas Desulfurization
Residue Landfill Permit No. 8505
Belews Creek Steam Station Stokes County
Belews Creek, North Carolina 27009

Dear Ms. Werner,
Attached you will find the Belews Creek Flue Gas Desulfurization Residue Landfill Additional
Assessment of Groundwater Exceedances. The assessment report is being submitted as part of
the ongoing assessment initiated in response to your letter dated November 9, 2011 to Mr. Ed
Sullivan, P.E. (Duke Energy).
Duke Energy is committed to excellent environmental stewardship and cooperation with the
Division regarding the operation, maintenance, safety, and integrity of all of its facilities. We
look forward to continuing to work with you regarding environmental concerns.

If there are any questions regarding this request, please contact me at [phone].

Respectfully submitted,
Melonie Martin
Environmental Services

Additional Assessment of
Groundwater Exceedances – Phase I
Belews Creek Steam Station Flue Gas Desulfurization
Residue Landfill Permit No. 8505
Site Name and Location Belews Creek Steam Station
3195 Pine Hall Road
Belews Creek, NC 27009
Groundwater Incident No.Not Assigned
NPDES Permit No.NC0024406
Date of Report May 31, 2017
Permittee and Current Property Owner Duke Energy Carolinas, LLC
526 South Church St.
Charlotte, NC 28202-1803
704.382.3853
Consultant Information HDR Engineering, Inc. of the Carolinas
440 South Church St, Suite 900
Charlotte, NC 28202
704.338.6700
Latitude and Longitude of Facility 36° 28’ 14” N, 80° 06’ 03” W
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
ii
Contents
Page
Section 1 – Background ............................................................................................................. 1
1.1 2011 Requirement for Groundwater Assessment......................................................... 1
1.2 Monitoring Well BC-25 Assessment............................................................................. 2
1.3 Supplemental Groundwater Assessment ..................................................................... 3
1.4 Additional Groundwater Assessment Work Plan.......................................................... 4
Section 2 – Site Description and Groundwater Monitoring Program........................................... 7
2.1 Site and Flue-gas Desulfurization Residue Landfill Description.................................... 7
2.2 Site Geology and Hydrogeology................................................................................... 8
2.3 Description of Monitoring System................................................................................. 9
2.4 Site Groundwater Flow ................................................................................................ 9
2.5 Groundwater Quality Monitoring..................................................................................10
Section 3 – Additional Assessment...........................................................................................11
3.1 Task 1 – Review Existing Data...................................................................................11
3.1.1 Analytical Results from Semi-Annual Sampling Events........................................11
3.1.2 Landfill Construction and Liner Information ..........................................................15
3.2 Well Inspection, Cleaning, and Redevelopment ..........................................................15
3.3 Collect and Analyze Soil and Surface Water Samples ................................................16
3.4 Water Level Monitoring in BC-25 ................................................................................18
3.5.1 Groundwater Analytical Results...........................................................................19
3.5.2 Refined Groundwater Flow ..................................................................................20
Section 4 – Conclusions and Recommendations ......................................................................21
4.1 Conclusions................................................................................................................21
4.2 Recommendations......................................................................................................22
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
iii
FIGURES
1. Site Location Map
2. Site Layout
3. Generalized Groundwater Surface Contours – November 2016
4. BC-20, BC-21, BC-25, BC-26, BC-32 Sulfate Concentrations
5. BC-25 Sulfate and TDS Concentrations
6. BC-20, BC-21, BC-25, BC-26, BC-32 TDS Concentrations
7. BC-20, BC-21, BC-25, BC-26, BC-32 Selenium Concentrations
8. SW-1 Sulfate and TDS Concentrations
9. Soil Sampling Locations
10. BC-25 Groundwater Elevations and Conductivity
11. BC-28 Groundwater Elevations and Conductivity
12. BC-25 Groundwater Elevations and Precipitation
13. BC-28 Groundwater Elevations and Precipitation
14. BC-20, BC-21, BC-25, BC-26, BC-27, BC-29, and BC-7 Groundwater Elevations
15. BC-20 Sulfate Concentrations and Groundwater Elevations
16. BC-21 Sulfate Concentrations and Groundwater Elevations
17. BC-25 Sulfate Concentrations and Groundwater Elevations
18. Additional Assessment Well Locations
19. Sulfate Isoconcentration Contour Map
20. Generalized Groundwater Surface Contours – March 2017
TABLES
1. Selected Sulfate Analytical Results for Monitoring Wells BC-20, BC-21, BC-25, BC-26,
and BC-32
2. Groundwater Analytical Results Background Monitoring Wells
3. Selected TDS Analytical Results for Monitoring Wells BC-20, BC-21, BC-25, BC-26,
and BC-32
4. Selected Selenium Analytical Results for Monitoring Wells BC-20, BC-21, BC-25, BC-
26, and BC-32
5. Summary of Soil Analytical Results
6. Summary of Groundwater Analytical Results
APPENDICES
A Well Inspection Forms and Redevelopment Logs
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 1 – Background
1
Section 1 – Background
The Belews Creek Steam Station (BCSS) Flue Gas Desulfurization (FGD) Residue Landfill
(FGD Residue Landfill), Permit No. 8505, is located at the Belews Creek Steam Station in
Stokes County, North Carolina (Figure 1), and is owned and operated by Duke Energy
Carolinas, LLC (Duke Energy).
Exceedances of groundwater quality standards, as found in Title 15A North Carolina
Administrative Code (NCAC) Subchapter 2L .0202 Groundwater Quality Standards (2L
Standards), were reported in samples collected from groundwater monitoring well BC-25 and
other monitoring wells sampled during the May 16, 2011, groundwater monitoring event. As
described below, an initial assessment and a supplemental assessment, as documented in
reports dated October 5, 2012, and June 4, 2014, respectively, were performed to evaluate if
the source of exceedances was related to naturally occurring conditions or to impacts from the
BCSS FGD Residue Landfill.
The results of evaluations completed in 2012 and 2014 did not conclusively identify the source
of exceedances in groundwater monitoring wells located north and northwest of the FGD
Residue Landfill. Thus, Duke Energy proposed a phased approach to additional assessment
activities to further evaluate whether the FGD Residue Landfill is the source of exceedances.
The initial phase, Phase I, proposed to review existing data and to collect field data from landfill
monitoring wells and other recently installed wells in the vicinity of the FGD Residue Landfill.
The results from Phase I would be used to identify if any additional field efforts (e.g., installation
of additional groundwater monitoring wells) are required in Phase II to determine if the FGD
Residue Landfill is the source of exceedances. The phased assessment was proposed and
documented in the Proposed Work Plan for Additional Assessment of Groundwater
Exceedances (work plan) and was submitted to the North Carolina Department of
Environmental Quality (NCDEQ)1 Division of Waste Management (DWM) in August 2016. The
work plan was approved by the NCDEQ DWM in correspondence dated September 7, 2016.
The results of Phase I activities are summarized herein.
1.1 2011 Requirement for Groundwater Assessment
In a letter dated November 9, 2011,2 to Mr. Ed Sullivan, P.E., of Duke Energy, the North
Carolina Department of Environment and Natural Resources (NCDENR) DWM stated that
exceedances of groundwater standards established in Title 15A North Carolina Administrative
Code (NCAC) Subchapter 2L .0202 Groundwater Quality Standards (2L Standards) were
reported in samples collected from groundwater monitoring well BC-25 during the May 16, 2011,
sampling event.3
1 Prior to September 18, 2015, the NCDEQ was referred to as the North Carolina Department of
Environment and Natural Resources (NCDENR). Both naming conventions are used in this report, as
appropriate.2 North Carolina Department of Environment and Natural Resources. Division of Waste Management.
November 9, 2011, Monitoring Well BC-25 Assessment. Duke Energy – Belews Creek FGD Landfill. DOC
ID 15487.3 The NCDENR letter references the monitoring event as occurring on May 6, 2011. The actual date for
the sampling event was May 16, 2011.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 1 – Background
2
The NCDENR letter stated that iron was reported at a concentration greater than the respective
2L Standard in the groundwater sample collected from BC-25 during this event. Monitoring well
BC-25 is located beyond the compliance boundary. NCDENR also stated that industrial landfills
are required to comply with the 2L Standards at the compliance boundary in accordance with
15A NCAC 13B .0503 (2)(d)(iv). The NCDENR letter also stated that iron and manganese were
reported at concentrations above their respective 2L Standards in groundwater monitoring wells
BC-20, BC-21, BC-23A, BC-26, BC-27, BC-29, and BC-31. These groundwater monitoring wells
are located at or beyond the review boundary (Figure 2).
NCDENR stated that based on these exceedances, Duke Energy must submit a groundwater
assessment work plan to the DWM. The assessment work plan, dated February 9, 2012, was
prepared by Altamont Environmental Inc. (Altamont) on behalf of Duke Energy and was
approved by the DWM on March 23, 2012 (DOC ID 16351).
1.2 Monitoring Well BC-25 Assessment
Monitoring well BC-25 is located outside of the compliance boundary and was installed as part
of the initial permitting site investigation to obtain groundwater elevations and was subsequently
incorporated into the groundwater sampling program. It was installed on February 21, 2006,
which was more than a year prior to the pre-placement sampling at the BCSS FGD Residue
Landfill.
HDR prepared and submitted an assessment4 to NCDENR on behalf of Duke Energy for
groundwater exceedances at groundwater monitoring wells BC-20, BC-21, BC-23A, BC-25,
BC-26, BC-27, BC-29, and BC-31 and at surface water sample location SW-1.
The assessment report concluded:
x The source of iron exceedances reported in monitoring wells BC-20, BC-21, BC-23A,
BC-26, BC-27, BC-29, and BC-31 appeared to be related to turbidity introduced from
naturally occurring sources;
x The source of manganese exceedances reported in monitoring well BC-27 appeared to
be related to turbidity introduced from naturally occurring sources;
x The manganese results at monitoring well BC-21 did not appear to be related to turbidity;
and
x The iron and manganese exceedances at surface water sampling location SW-1
appeared to be from naturally occurring sources and not related to impacts from the FGD
Residue Landfill.
The report included an assessment of 2L Standard exceedances for iron, sulfate, and TDS at
monitoring well BC-25. The iron exceedances were determined to be attributed to turbidity in the
groundwater samples and naturally occurring conditions. The assessment report concluded that
the source of the sulfate in monitoring well BC-25 appeared to be from the FGD Residue
Landfill.
4 HDR Engineering, Inc. of the Carolinas report Groundwater Assessment, Belews Creek Steam Station,
FGD Residue Landfill, Permit No. 8505, dated October 5, 2012.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 1 – Background
3
HDR recommended installing an additional monitoring well at the review boundary between
monitoring well BC-25 and the FGD Residue Landfill to further delineate the sulfate and TDS
concentrations in this area and improve the understanding of groundwater flow near monitoring
well BC-25. HDR further recommended that monitoring well BC-21 be re-sampled when the new
monitoring well is sampled.
In a letter dated November 28, 2012, to Mr. Ed Sullivan, P.E., of Duke Energy, the NCDENR
DWM approved the recommendations presented in HDR’s groundwater assessment report
dated October 5, 2012.5
1.3 Supplemental Groundwater Assessment
A supplemental groundwater assessment at the FGD Residue Landfill was performed as stated
in the recommendations in the groundwater assessment report dated October 5, 2012. The
supplemental assessment report6 dated June 4, 2014, included a description of the additional
monitoring well (BC-32) installed at the review boundary between monitoring well BC-25 and the
FGD Residue Landfill to further delineate the sulfate and TDS concentrations in this area and
improve the understanding of groundwater flow near monitoring well BC-25.
HDR reviewed the operations of the FGD Residue Landfill, the groundwater flow in the FGD
Residue Landfill area, and the analytical results for groundwater monitoring wells, and evaluated
the following as the possible sources of the exceedances for sulfate and TDS in monitoring
wells BC-20, BC-21, BC-25, and BC-32 and for selenium in monitoring well BC-21:
x Leachate leakage through the engineered liner system and
x Gypsum deposited onto the ground surface infiltrating into groundwater.
If the source of the sulfate and TDS in monitoring wells BC-20, BC-21, and BC-25 and the
source of the selenium in monitoring well BC-21 was caused by leakage in the liner system as a
result of the failure of the geo-synthetic clay liner (GCL) to seal a defect or damage to the
geomembrane, it was reasonable to expect that:
1. The concentration of sulfate, TDS, and selenium in newly installed monitoring well
BC-32 would be greater than the concentrations observed in monitoring well BC-25.
2. The concentrations of sulfate and TDS in monitoring wells BC-20, BC-21, and BC-25
and the concentration of selenium in monitoring well BC-21 would continue to increase
or remain elevated.
It was concluded in the supplemental assessment report that although it was not possible to
eliminate leakage through the liner system as a cause, HDR did not consider leakage through
the liner system to be the likely source of the exceedances because:
5 North Carolina Department of Environment and Natural Resources, Division of Waste Management.
November 28, 2012, Groundwater Assessment Report Response. Duke Energy – Belews Creek FGD
Landfill, DOC ID 17761.6 North Carolina Department of Environment and Natural Resources, Division of Waste Management.
June 4, 2014, Supplemental Groundwater Assessment. Duke Energy – Belews Creek FGD Landfill.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 1 – Background
4
x The sulfate and TDS concentrations had decreased since May 2013 in monitoring wells
BC-20, BC-21, and BC-25, and since August 2013 in monitoring well BC-21.
x The sulfate concentrations measured in monitoring well BC-32 were less than those
measured in monitoring well BC-25.
x The selenium concentrations decreased in monitoring well BC-21 and in BC-25.
The additional assessment report concluded that increases in precipitation runoff received by
non-contact stormwater basins SB-6 and SB-7, due to the progress of filling Cell 1, may have
caused deposited FGD residue to be subjected to increased infiltration into the groundwater at
these basins.
Based on the correlation between groundwater level and increase in sulfate, TDS, and selenium
concentrations observed in the monitoring wells located in close proximity to the sediment
basins, it appears that an increase in surface runoff and infiltration of gypsum into the
groundwater in this area may be the source of exceedances of sulfate, TDS, and selenium in
these wells.
As part of the supplemental assessment report, HDR recommended:
1. Concentrations of sulfate in BC-32 are in excess of the 2L Standard. Monitoring well
BC-32 was installed at the review boundary and should continue to be sampled as part
of the groundwater monitoring program for the FGD Residue Landfill.
2. Although decreasing, concentrations of sulfate and TDS in BC-25 are in excess of the
respective 2L Standards. If the concentrations of sulfate and TDS decrease to below the
2L Standard in monitoring wells BC-25 and BC-32 and remain below the 2L Standard for
a minimum of two sampling events, HDR recommends that groundwater monitoring be
discontinued in monitoring well BC-25 and that monitoring well BC-32 be incorporated
into the groundwater monitoring program for the FGD Residue Landfill as BC-32 is
located at the review boundary and BC-25 is outside of the compliance boundary.
Monitoring well BC-25 would be abandoned at that time.
3. If the concentrations of sulfate and TDS remain above the 2L Standards in monitoring
wells BC-25 and BC-32 for the next three sampling events, conduct an additional
assessment to identify the source of the exceedances.
1.4 Additional Groundwater Assessment Work Plan
The Phase I Proposed Additional Groundwater Assessment Work Plan (work plan) to address
the recommendations presented in the June 4, 2014, supplemental groundwater assessment
report was submitted in August 2016 and approved by the NCDEQ DWM on September 7,
2016.7 The work plan scope included reviewing existing data and collecting field data to
evaluate if the BCSS FGD Residue Landfill is the source of the sulfate and TDS exceedances of
the 2L Standards in monitoring wells BC-25 and BC-32. The work plan was later amended to
use previously installed groundwater monitoring wells in close proximity to the proposed well
7 North Carolina Department of Environmental Quality, Division of Waste Management.
September 7, 2016, Approval of Work Plan, Additional Assessment of Groundwater Exceedances. Duke
Energy Carolinas – Belews Creek Steam Station FGD Landfill, DOC ID 26714.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 1 – Background
5
locations (FGDLA-1S/D and FGDLA-2S/D) as indicated in the original work plan.
8 NCDEQ
DWM approved the amendment to the work plan in a February 24, 2017, letter to Duke Energy.
9
The assessment work plan included the following:
x An evaluation of the 2L Standard exceedances of sulfate and TDS in monitoring wells
BC-20, BC-21, BC-25, and BC-32. During the August 19, 2013, sampling event, a 2L
Standard exceedance for selenium was reported in monitoring well BC-21. An
assessment of the selenium exceedance in monitoring well BC-21 was included in the
June 4, 2014, supplemental groundwater assessment report.
x During the May 2015 and November 2015 sampling events, selenium was reported in
monitoring well BC-25 at concentrations greater than the 2L Standard. An assessment of
selenium at this monitoring well will also be included in this additional groundwater
assessment report.
x Sulfate and TDS concentrations reported at seep sampling location SW-1 have been
generally increasing over the period of monitoring. A preliminary review of the May 2016
sampling results indicate a 2L Standard exceedance of sulfate at this location. An
assessment of sulfate and TDS at SW-1 will also be included in this additional
groundwater assessment report.
x The groundwater assessment will be performed in two phases. The initial phase, Phase I,
will be used to review existing data and to collect field data that will be used to evaluate if
the BCSS FGD Residue Landfill is the source of the exceedances. The results from
Phase I will be used to identify if any additional field efforts (e.g., installation of additional
groundwater monitoring wells) are required in Phase II to determine if the FGD Residue
Landfill is the source of exceedances.
The Phase I work plan tasks identified to conduct the additional groundwater assessment
include the following:
x Task 1 – Review Existing Data
x Task 2 – Well Inspection, Cleaning, and Redevelopment
x Task 3 – Collect and Analyze Soil and Surface Water Samples
x Task 4 – Install Water Level and Conductance Logger in BC-25
x Task 5 – Installation of Assessment Groundwater Monitoring Wells
x Task 6 – Phase I Assessment Report
8 Duke Energy. February 23, 2017, Amendment to FGD Residue Landfill Proposed Work Plan, Additional
Assessment of Groundwater Exceedances. Permit No.: 8505-INDUS-, Belews Creek FGD Residue
Landfill, Belews Creek Steam Station.9 North Carolina Department of Environmental Quality, Division of Waste Management.
February 24, 2017, Concurrence to Amendment to FGD Residue Landfill Proposed Work Plan, Additional
Assessment of Groundwater Exceedances. Duke Energy Carolinas – Belews Creek Steam Station FGD
Landfill, DOC ID 27448.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 1 – Background
6
The results of these tasks are presented in Section 3 of this Phase I Additional Assessment of
Groundwater Exceedances – Phase I Report (Task 6).
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 2 – Site Description and Groundwater Monitoring Program
7
Section 2 – Site Description and Groundwater
Monitoring Program
2.1 Site and Flue-gas Desulfurization Residue Landfill
Description
The FGD Residue Landfill is located at Duke Energy’s Belews Creek Steam Station. Belews
Creek Steam Station is a two-unit, coal-fired generating facility located on Belews Lake in
Stokes County, North Carolina.
The FGD Residue Landfill is permitted under the NCDEQ Solid Waste Permit No. 8505 to
receive coal combustion products, FGD residue (gypsum), wastewater treatment clarifier
sludge, waste limestone material, sand blast material, and waste coal produced at the Belews
Creek Steam Station. However, the FGD Residual Landfill typically receives only gypsum. Other
waste streams are disposed in the Craig Road Ash Landfill (Permit #8504). The FGD Residue
Landfill is located south of the Belews Creek power plant on a peninsula of land in Belews Lake.
The FGD Residue Landfill and nearby surrounding area are depicted on Figure 1.
The location of the FGD Residue Landfill is on the northwestern facing side of a ridge running
the length of the peninsula. A gravel road, located near monitoring wells BC-28 and BC-23A,
runs generally along the crest of this ridge. Craig Road is located to the southwest of the FGD
Residue Landfill. A gypsum stack-out yard and limestone storage yard are located to the north
of the FGD Residue Landfill. A surface water drainage feature is located to the south of the FGD
Residue Landfill, draining from the topographic high east of the landfill to the west towards Craig
Road. In general, the original site topography slopes from the ridge to the north and to the west.
Two sets of high-voltage transmission lines running roughly east to west are located
immediately adjacent to and along the northern side of the FGD Residue Landfill.
The FGD Residue Landfill consists of four cells contained in an area of approximately 24 acres
as shown on Figure 2. The landfill has an engineered liner system consisting of a leachate
collection system, underlain by a high-density polyethylene (HDPE) geomembrane liner,
underlain by a GCL. A stormwater basin is located on the western edge of the FGD Residue
Landfill and occupies an area of approximately 2.4 acres. The stormwater basin is used to
manage leachate and contact stormwater collected from the FGD Residue Landfill.
The stormwater basin is constructed with a concrete bottom surface, underlain by an HDPE
geomembrane liner, which is underlain by a GCL placed above the prepared soil foundation.
The FGD Residue Landfill first accepted waste in April 2008. Initial waste placement began in
Cell 1. Waste placement has progressed across the four cells of the landfill. As described in the
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 2 – Site Description and Groundwater Monitoring Program
8
operations plan, a 12-inch-thick interim soil cover layer is placed as a dust control measure
where final waste grades are achieved.10
2.2 Site Geology and Hydrogeology
In 2005, S&ME, Inc. (S&ME) prepared a site suitability study for the BCSS FGD Residue
Landfill.11 In 2015, HDR prepared a comprehensive site assessment (CSA) of the BCSS site.12
The 2005 and 2015 studies serve as the background for the discussion of the site geology and
hydrogeology. The BCSS site is located in the Milton terrane. Rock units mapped in the vicinity
of the site include alluvium, terrace deposits, sedimentary rocks of the Dan River Basin, a
diabase dike, and felsic gneisses and schists with interlayered hornblende gneiss and schist.
The alluvium consists of unconsolidated sand, silt, and clay with occasional subhedral to well-
rounded pebbles and cobles. The terrace deposits consist of unconsolidated sand, silt, and clay
with pebbles and cobles of quartz. In places, the terrace deposits are comprised of large
angular quartz fragments in a red matrix of sand, silt, and clay. The diabase occurs in a long,
relatively thin dike. The rocks of the Milton terrane in the area include interlayered augen gneiss,
quartz-feldspar gneiss, flaser gneiss, “button” mica schist, and with interlayers of hornblende
gneiss and schist.
Based on the 2005 site suitability study, the bedrock in the vicinity of the FGD Residue Landfill
generally consists of schist and gneiss. The soils that overlie the bedrock in the area have
generally formed from the in-place weathering of the parent bedrock. These soils are termed
residuum (residual soils) and saprolite. Based on the CSA site investigation, the groundwater
system in the natural materials (alluvium, soil, soil/saprolite, and bedrock) at the BCSS site is
consistent with the regolith-fractured rock system and is generally an unconfined, connected
aquifer system without confining layers. The groundwater system at the BCSS site is divided
into three layers referred to in this report as the shallow, deep (TZ), and bedrock flow layers, so
as to distinguish flow layers within the connected aquifer system.
Groundwater flow and transport at the BCSS site are assumed to follow the local slope aquifer
system. Under natural conditions, the general direction of groundwater flow can be
approximated from the surface topography. Topographic divides are located to the south and
east of the ash basin approximately along Pine Hall Road. A topographic divide exists to the
west of the ash basin along Middleton Loop Road. Another topographic divide exists north of the
ash basin along a ridgeline that extends from the east dike abutment toward the northeast.
These topographic divides generally function as groundwater divides although groundwater flow
across topographic divides may be possible based on driving head conditions from the ash
basin and the existence of preferential flow paths within the shallow and/or deep flow layers.
The predominant direction of groundwater flows north and northwest toward the Dan River.
10 Belews Creek Steam Station FGD Residue Landfill Operations Plan, prepared by Joyce Engineering,
May 23, 2012, JEI Project: 845.1202.11 Task 01, DIN 16987.11 Geologic and Hydrogeologic Siting Report FGD Scrubber Residue Disposal Site Belews Creek Steam
Station, Belews Creek, North Carolina, S&ME Project No. 1054-04-955, September 28, 2005.12 Comprehensive Site Assessment Report, Belews Creek Steam Station Ash Basin, Belews Creek, North
Carolina, HDR Engineering, Inc. of the Carolinas, September 9, 2015.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 2 – Site Description and Groundwater Monitoring Program
9
2.3 Description of Monitoring System
According to the Water Quality Monitoring Plan (WQMP),13 the groundwater monitoring system
at the FGD Residue Landfill consists of the following sampling locations:
Monitoring Wells:
BC-7 BC-26
BC-20 BC-27
BC-21 BC-28
BC-22 BC-29
BC-23A BC-30
BC-25 BC-31
Surface Water Sample Location:SW-1
Leachate Sample:Leachate
The groundwater, surface water, and leachate sample locations are shown on Figure 2.
According to the WQMP, monitoring wells BC-23A and BC-28 represent background
groundwater quality conditions.
Monitoring well BC-7 is used for water level measurements only. Other BCSS FGD Residue
Landfill monitoring wells are used to monitor groundwater quality in the residual soil/saprolite
layer and to measure groundwater levels.
Sampling location SW-1 is an area of wetness (AOW) located east of monitoring well BC-28.
Periodically, water emanates from the ground just above this sampling location. Therefore,
analytical results from sampling location SW-1 are compared to 2L Standards. This surface
water feature drains to Belews Lake.
The FGD Residue Landfill leachate is sampled at a location within the stormwater basin as
shown on Figure 2.
2.4 Site Groundwater Flow
As previously described, the FGD Residue Landfill is located on the northwestern side of a ridge
running the length of a peninsula between the West Belews Creek arm and the East Belews
Creek arm of Belews Lake. A gravel road, located near monitoring wells BC-28 and BC-23A,
runs generally along the crest of this ridge. Craig Road is located to the southwest of the FGD
Residue Landfill. The approximate ground elevation at monitoring well BC-28 is 815.6 feet and
the approximate ground elevation at monitoring well BC-23A is 861.3 feet.
The gypsum stack-out yard and limestone storage yard are located north of the FGD Residue
Landfill and monitoring wells BC-25, BC-20, and BC-21. The approximate ground elevation at
monitoring well BC-25 is 746 feet. A surface water drainage feature is located south of the FGD
Residue Landfill and drains to the west towards Craig Road. In general, the original site
13 Water Quality Monitoring Plan FGD Scrubber Residue Landfill Belews Creek Steam Station, S&ME
Project 1054-04-955, December 07, 2007.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 2 – Site Description and Groundwater Monitoring Program
10
topography slopes from the ridge near monitoring wells BC-28 and BC-23A towards the north
and the west. The elevation of Belews Lake ranges from approximately 722 feet to 725 feet.
The predominant groundwater discharge area in the region of the FGD Residue Landfill is
expected to be Belews Lake to the northwest of the landfill. Generalized groundwater surface
contours from the November 2016 sampling event are shown on Figure 3. Groundwater flow in
the area of interest to this assessment is discussed in greater detail in Section 5.1.2.
2.5 Groundwater Quality Monitoring
In accordance with the WQMP, groundwater monitoring is performed semi-annually in May and
November. Sampling results are due to NCDEQ DWM within 120 days of sampling.
The initial groundwater sampling event at the FGD Residue Landfill was performed on
November 5, 2007, prior to initial waste placement in April 2008. All 12 monitoring wells were
installed prior to the initial sampling event. Surface water sample location SW-1 was first
sampled in November 2010. The most recent groundwater monitoring event was conducted on
May 3, 2017.14
14 These results will be presented in a subsequent semiannual groundwater monitoring report due to
NCDEQ in November 2017. The most recent semiannual groundwater monitoring report to have been
submitted to NCDEQ was for the November 2016 monitoring event titled Semiannual Groundwater
Monitoring Report, Belews Creek Steam Station, FGD Residue Landfill, Permit No.8505, November 2016
Sampling Event, January 25, 2017, prepared by HDR Engineering, Inc. of the Carolinas.
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Section 3 – Additional Assessment
Additional assessment activities identified in the work plan were addressed and the activity
descriptions and findings are discussed in the following section.
3.1 Task 1 – Review Existing Data
3.1.1 Analytical Results from Semi-Annual Sampling Events
Since the completion and submittal of HDR’s June 4, 2014, Supplemental Groundwater
Assessment Report, the monitoring network at the FGD Residue Landfill has been sampled
during the following six semi-annual events:
x May 2014
x November 2014
x May 2015
x November 2015
x May 2016
x November 2016
A sub-set of the monitoring network was also sampled as part of this additional assessment.
Monitoring wells BC-20, BC-21, BC-23A, BC-25, BC-28, and BC-32 were sampled on March 8,
2017.
The analytical results from the six semi-annual sampling events listed above were presented in
the following reports prepared by HDR:
x Semiannual Groundwater Monitoring Report, Belews Creek Steam Station, FGD Residue
Landfill, May 2014 Sampling Event, dated July 29, 2014.
x Semiannual Groundwater Monitoring Report, Belews Creek Steam Station, FGD Residue
Landfill, November 2014 Sampling Event, dated February 3, 2015.
x Semiannual Groundwater Monitoring Report, Belews Creek Steam Station, FGD Residue
Landfill, May 2015 Sampling Event, dated July 17, 2015.
x Semiannual Groundwater Monitoring Report, Belews Creek Steam Station, FGD Residue
Landfill, November 2015 Sampling Event, dated February 2, 2016.
x Semiannual Groundwater Monitoring Report, Belews Creek Steam Station, FGD Residue
Landfill, May 2016 Sampling Event, dated August 2, 2016.
x Semiannual Groundwater Monitoring Report, Belews Creek Steam Station, FGD Residue
Landfill, November 2016 Sampling Event, dated January 25, 2017.
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Groundwater Quality Exceedances - Sulfate
The initial sulfate exceedance in the FGD Residue Landfill monitoring network was measured in
monitoring well BC-25 during the November 7, 2011, sampling event. The sulfate results from
November 2011 through March 2017 for monitoring wells BC-20, BC-21, BC-25, BC-26, and
BC-32 are presented in Table 1. These wells are located at or beyond the review boundary.
Exceedances of the sulfate 2L Standard have been measured in monitoring wells BC-20,
BC-21, BC-25, and BC-32. Sulfate concentrations in monitoring well BC-26 have consistently
been reported below the 2L Standard.Figure 4 depicts the sulfate concentrations for monitoring
wells BC-20, BC-21, BC-25, BC-26, and BC-32 over the period of monitoring at the FGD
Residue Landfill. Review of these data indicates the following trends and observations:
x Concentrations in monitoring well BC-25 have decreased since the May 2015 sampling
event.
x Concentrations in monitoring well BC-32 have been greater than the 2L Standard and
have continually increased since the installation sampling event in August 2013, with the
exception of a decrease in concentration from the November 2016 to the March 2017
sampling event.
x Concentrations measured in monitoring wells BC-20 and BC-21 have been greater than
the 2L Standard since the May 2014 sampling event, with the exception of the November
2014 sampling event at BC-20 when sulfate was reported below the 2L Standard.
x Background concentrations have ranged from 184 to 630 micrograms per liter (μg/L) in
monitoring well BC-23A and from <100 to 466 μg/L in monitoring well BC-28, with the
exception of the period from May 2008 to November 2011 when the laboratory method
reporting limit (MRL) for sulfate was reported to be 5,000 μg/L. Background monitoring
well results are presented on Table 2.
x Monitoring well BC-32 is located between the FGD Residue Landfill and monitoring well
BC-25. The sulfate concentrations measured in monitoring well BC-32 have been greater
than the 2L Standard during each sampling event and have increased during each event
since the well was installed and sampled during the August 2013 sampling event until the
November 2016 sampling event. The sulfate concentration decreased from the
November 2016 to the March 2017 sampling event. The concentrations reported in
MW-32 were less than the sulfate concentrations measured in monitoring well BC-25
during each sampling event, with the exception of the recent March 2017 event.
Considering groundwater flow direction, if the FGD Residue Landfill was the source of
sulfate in groundwater, concentrations in well BC-32 should be higher than those
measured in well BC-25; however, sulfate concentrations have consistently been higher
in BC-25 than BC-32.
Groundwater Quality Exceedances – Total Dissolved Solids
Total dissolved solids (TDS) is defined by the United States Environmental Protection Agency
(USEPA) as consisting of calcium, chlorides, nitrate, phosphorous, iron, sulfur, and other ion
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particles that will pass through a filter with pores of 2 microns in size
(http://water.epa.gov/type/rsl/monitoring/vms58.cfm).
The trend of TDS results from monitoring wells at the FGD Residue Landfill are similar to trends
observed for sulfate. The correlation between sulfate and TDS concentrations in monitoring well
BC-25 is shown on Figure 5.
The initial TDS exceedance in the FGD Residue Landfill monitoring network was measured in
monitoring well BC-25 during the November 7, 2011, sampling event. The TDS results from
November 2011 through March 2017 for monitoring wells BC-20, BC-21, BC-25, BC-26, and
BC-32 are presented in Table 3. Review of these data indicates the following trends and
observations:
x TDS concentrations measured in the background monitoring wells have ranged from
44,000 to 138,000 μg/L in monitoring well BC-23A and from 36,000 to 81,000 μg/L in
monitoring well BC-28. Background monitoring well results are presented in Table 2.
x Exceedances of the 2L Standard have been measured in monitoring wells BC-20, BC-21,
BC-25, and BC-32. TDS concentrations in monitoring wells BC-20, BC-21, BC-25, BC-26,
and BC-32 over the period of monitoring at the landfill are shown on Figure 6.
x TDS concentrations in monitoring well BC-25 have decreased since the November 2015
sampling event, with an increase during the March 2017 sampling event.
x TDS concentrations in monitoring well BC-32 have been greater than the 2L Standard
and generally increased from the installation sampling event in August 2013 until the May
2016 sampling where they began to decrease.
x TDS concentrations measured in monitoring wells BC-20 and BC-21 have been greater
than the 2L Standard since the May 2014 sampling event, with the exception of the
November 2014 sampling event at BC-20 which was less than the 2L Standard.
x Monitoring well BC-32 is located between the FGD Residue Landfill and monitoring well
BC-25. TDS concentrations measured in monitoring well BC-32 have been greater than
the 2L Standard during every sampling event and have generally increased since the well
was first installed and sampled during the August 2013 sampling event until the May
2016 sampling where they began to decrease. The concentrations reported in MW-32
were less than the TDS concentrations measured in monitoring well BC-25 during these
sampling events with the exception of the November 2016 sampling event in which the
results were generally the same with BC-32 (1,330,000 ug/L) being a slightly greater
concentration than BC-25 (1,320,000 ug/L). If the source of TDS measured in these
monitoring wells was the landfill, it would be expected that the concentrations measured
in monitoring well BC-32 would be consistently greater than those measured in
monitoring well BC-25; however, TDS concentrations have consistently been higher in
BC-25 than BC-32.
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Groundwater Quality Exceedances – Selenium
Concentrations of selenium that exceeded the 2L Standard were measured in monitoring well
BC-21 during the August 2013 sampling event and in monitoring well BC-25 during the May and
November 2015 sampling events. These exceedances constitute the only 2L Standard
exceedances for selenium in the monitoring network over the period of monitoring. The
selenium concentration in monitoring well BC-21 returned to a concentration less than the 2L
Standard during the subsequent November 2013 sampling event. The selenium concentration in
BC-25 has been decreasing since the November 2015 exceedance and has been less than the
2L Standard during the last two sampling events. The selenium results from November 2011
through March 2017 for monitoring wells BC-20, BC-21, BC-25, BC-26, and BC-32 are
presented in Table 4 and are shown on Figure 7. Review of these data indicates the following
trends and observations:
x Selenium has not been measured at a concentration that attains or exceeds the
laboratory reporting limit in background monitoring wells BC-23A and BC-28 over the
period of monitoring. Background monitoring well results are presented in Table 2.
Monitoring well BC-32 is located between the FGD Residue Landfill and monitoring well
BC-25. Selenium concentrations measured in monitoring well BC-32 have been less than
the 2L Standard during every sampling event and less than the selenium concentrations
measured in monitoring well BC-25 during every sampling event. If the source of
selenium measured in these monitoring wells was the landfill, concentrations measured
in monitoring well BC-32 should be consistently greater than those measured in
monitoring well BC-25; however, selenium concentrations have consistently been higher
in BC-25 than BC-32.
Surface Water Quality Exceedances – Sulfate and TDS
Sulfate and TDS concentrations reported at AOW sampling location SW-1 have generally
increased from the November 2010 through the May 2016 sampling event. The concentration
reported during the May 2016 sampling event constituted the first 2L Standard exceedance of
sulfate reported during the monitoring period. The sulfate and TDS results reported in the
sample collected during the November 2016 sampling event decreased to levels similar to the
November 2010 and May 2011 results. Sulfate and TDS results at SW-1 over the period of
monitoring are presented on Figure 8.
Monitoring wells BC-31 and BC-28 are the closest landfill monitoring wells to AOW sample
location SW-1. Sulfate concentrations over the period of monitoring in these monitoring wells
have ranged from 271 to 2,712 ug/L. Based on the generalized groundwater surface contours,
groundwater at these monitoring wells is flowing to the west and northwest across the landfill,
and not from the landfill towards SW-1.
Historical aerial deposition from the gypsum stack-out area may have contributed to the
concentrations of sulfate and/or TDS reported in the samples collected from SW-1.
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Enhanced dust control measures at the gypsum stack-out pad were implemented in October
2015 to minimize fugitive dust emissions. Control of fugitive dust at the gypsum stack-out area
will reduce the aerial deposition of gypsum in the surrounding area. If fugitive dust was the
cause of the historical increases in concentrations reported at SW-1, the concentrations of
sulfate and TDS should continue to decrease or remain stable at the SW-1 sample location.
3.1.2 Landfill Construction and Liner Information
The FGD Residue Landfill consists of four cells contained in an area of approximately 24 acres
as shown on Figure 2. The FGD Residue Landfill first accepted waste in April 2008. Initial
waste placement began in Cell 1. As of June 30, 2013, approximately 1,078,464 tons of waste
had been placed in the landfill. Waste placement has progressed across the four cells of the
landfill. As described in the operations plan, a 12-inch-thick interim soil cover layer is placed as
a dust control measure where final waste grades are achieved.
The landfill has an engineered liner system consisting of a leachate collection system, underlain
by a HDPE geomembrane liner, underlain by a GCL.
A stormwater basin is located on the western edge of the FGD Residue Landfill and occupies an
area of approximately 2.4 acres. The stormwater basin is used to manage leachate and contact
stormwater collected from the FGD Residue Landfill. The stormwater basin is constructed with a
concrete bottom surface, underlain by an HDPE geomembrane liner, which is underlain by a
GCL placed above the prepared soil foundation.
If the source of the sulfate and TDS in monitoring wells BC-20, BC-21, BC-25, and BC-32, and
the source of the selenium in monitoring wells BC-21 and BC-25 was caused by leakage in the
liner system as a result of the failure of the GCL to seal a defect or damage to the
geomembrane, it was reasonable to expect that:
1. The concentration of sulfate, TDS, and selenium in monitoring well BC-32 would be
greater than the concentrations observed in monitoring well BC-25.
2. The concentrations of sulfate and TDS in monitoring wells BC-20, BC-21, BC-25, and
BC-32, and the concentration of selenium in monitoring wells BC-21 and BC-25 would
continue to increase or remain elevated.
However, the data reviewed in this assessment does not indicate that either line of evidence is
occurring at the FGD Residue Landfill.
3.2 Well Inspection, Cleaning, and Redevelopment
The BCSS FGD Residue Landfill compliance monitoring well sampling records were reviewed to
identify wells with historically high (>10 NTU) turbidity measurements. Historically high turbidity
was identified in monitoring wells BC-23A, BC-25, and BC-30; these wells were scheduled for
redevelopment to potentially remove fine-grained particles from the well and sand pack.
Monitoring wells BC-20, BC-21, and BC-32 were also identified for redevelopment due to
historical groundwater quality standard exceedances.
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On November 9, 10, and 11, 2016, SynTerra personnel completed inspections of the
compliance wells at the BCSS FGD Residue Landfill and found the surface completions in
satisfactory condition. The dedicated pumps were removed from monitoring wells BC-20,
BC-21, BC-23A, BC-25, BC-30, and BC-32 prior to their redevelopment. The pumps were
inspected and cleaned with deionized water. Well inspection forms are presented in
Appendix A.
The six monitoring wells scheduled for redevelopment were evacuated of between 10 and 20
well volumes. Only well BC-21 exhibited a reduction in turbidity readings during redevelopment.
The five remaining monitoring wells (BC-20, BC-23A, BC-25, BC-30, and BC-32) continued to
yield turbid water (>10 NTU and brown coloration) with suspended sediment after a minimum of
10 well volumes purged. The observations suggest that sediment infiltration may be occurring
via the formation into the well screen as no evidence of surficial sediment intrusion was
observed around the well surface completions. Well redevelopment logs are in included in
Appendix A.
Neoprene slip caps (2-inch diameter) were installed on the well heads after inspection and
redevelopment. Monitoring well BC-22 contained a wider pump cap preventing the installation of
a 2-inch neoprene cap on this well.
All of the groundwater monitoring wells that were redeveloped (BC-20, BC-21, BC-23A, BC-25,
BC-30, and BC-32) were sampled for analysis in March 2017 with the exception of monitoring
well BC-30. The turbidity readings reported in the five monitoring wells that were redeveloped
were all less than 10 NTU.
3.3 Collect and Analyze Soil and Surface Water Samples
Monitoring wells BC-25, BC-32, BC-21, and BC-20 are located between the BCSS FGD
Residue Landfill and the gypsum stack-out area as shown on Figure 2. Soil samples were
collected from locations between these areas to evaluate possible surficial sources for the
exceedances reported in the monitoring wells. The approximate locations of the soil samples
are depicted on Figure 9. Background soil samples were also collected at similar depths from a
location east of the FGD Residue Landfill (FGDBGSB-1).
Sample locations include the sediment basins north of the landfill, the drainage feature adjacent
to BC-25, and other areas as shown on Figure 9.
The soil samples were collected using a hand auger at five approximate depth intervals: ground
surface, 1 foot below ground surface (bgs), 2 feet bgs, 3 feet bgs, and at hand auger refusal (or
5 feet bgs, whichever is encountered first). Soil samples were analyzed for the following
constituents using the methods identified in the work plan: boron, chloride, fluoride, iron,
manganese, selenium, and sulfate.
All of the proposed surface water sample locations were dry at the time of sampling; therefore,
soil samples were collected from the designated surface water sample locations. Hand auger
refusal was encountered prior to reaching 5 feet bgs at 14 of the 19 sample locations.
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The depths of the soil samples and the results of the analyses are presented in Table 5.
Results of soil sample collection and analysis are as follows:
x Five soil samples were collected from the background soil sample location (FGDBGSB-1)
from depths ranging from the ground surface (0 to 0.5 foot bgs) to approximately 5 feet
bgs. Selenium concentrations in the background soil samples ranged from 0.717
milligrams per kilogram (mg/kg) in the 0 to 0.5-foot bgs sample to 1.24 mg/kg in the 5-foot
sample. The NCDEQ protection of groundwater preliminary soil remediation goal (PSRG)
for selenium is 2.1 mg/kg. Selenium was reported in all of the soil samples collected at
concentrations greater than the laboratory reporting limit and several concentrations
reported were greater than the protection of groundwater PSRG.
x Sulfate concentrations in the background soil samples ranged from less than the
laboratory reporting limit (1.67 mg/kg) in the sample collected from 3 feet bgs to 42.6
mg/kg in the sample collected from 0 to 0.5-foot bgs. There is no established protection
of groundwater PSRG for sulfate. The sulfate concentrations reported in the soil samples
tend to decrease in concentration with greater depths. The results of analysis of soil
samples collected from the 4-foot or 5-foot bgs range were consistent with results
reported for background samples.
Aerial deposition due to historical housekeeping/operations at the gypsum stack-out area may
have contributed to the concentrations of sulfate and/or selenium reported in the soil samples
collected near the ground surface in this portion of the site. The selenium and sulfate reported in
the soil may be contributing to concentrations of these constituents in groundwater.
Duke Energy instituted a dust management plan at the FGD Residue Landfill in January 2013.
Additionally, in April 2012, a tire/truck washing system was installed to minimize dusting. The
wash system was installed to wash the tires and underneath the trucks prior to the trucks
leaving the gypsum stack-out area. A similar washing system is employed for vehicles leaving
the FGD Residue Landfill.
Dust control measures at the gypsum stack-out pad have been updated and implemented since
October 2015 in order to minimize fugitive dust. The maintenance and housekeeping activities
implemented at the gypsum stack-out area since October 2015 include:
x Asphalt paving and sealing of the area under the radial stacker;
x Installation of curbing along the non-ditched portion of the pad road perimeter;
x Cleaning and flushing of the subsurface drainage system;
x Extension of the vertical spray guards at the wheel wash;
x Sealing of perimeter road and ditchline cracks;
x Concrete paving of some perimeter exposed areas;
x Affixing the pad liner to the interior of the perimeter road;
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x Addition of a dedicated water truck for road cleaning and dust control; and
x No loading in the scale area.
The reduction of fugitive dust at the gypsum stack-out area will reduce the aerial deposition of
gypsum in the surrounding area and reduce gypsum on the ground surface being introduced to
groundwater during rain (flushing) events.
3.4 Water Level Monitoring in BC-25
A data logger, capable of measuring and recording water levels, temperature, and conductivity
was installed in well BC-25 to assist in evaluating possible impacts from surface water. The
logged data was reviewed for changes that may be attributed to infiltration of surface water. For
comparison to background conditions, a second logger was installed to monitor the same
parameters in BC-28, the site background well.
The dataloggers were installed on November 30, 2016, and downloaded approximately every
2 weeks over the period of monitoring to assure that they were functioning properly. The
dataloggers were removed from the monitoring wells on February 2, 2017.
Graphs of groundwater elevations and conductivity readings from the dataloggers placed in
monitoring wells BC-25 and BC-28 are presented on Figures 10 and 11, respectively.
Comparing the water levels and conductivity readings in these wells yields no direct correlation.
However, the conductivity readings in BC-25 are greater than those reported in BC-28. Also, the
variability of both groundwater elevations and conductivity readings in BC-25 are greater than
those reported in BC-28 which maintained relatively constant water level and conductivity
readings over the logging period. The location of sediment basin SB-6 located adjacent to
BC-25 may be having an effect on the greater variability in groundwater elevations compared to
BC-28 which is not located near a sediment basin.
Rainfall data over the logging period were obtained from United States Geologic Survey (USGS)
rainfall gauge 02069000 located on the Dan River at Pine Hall, North Carolina. Precipitation and
groundwater elevation graphs for monitoring wells BC-25 and BC-28 are presented on
Figures 12 and 13, respectively. Monitoring well BC-25 (located near the sediment basins)
shows a greater fluctuation in groundwater elevation compared to rainfall amounts than does
BC-28 for the same rainfall events.
The groundwater elevations in monitoring wells BC-20, BC-21, BC-25, BC-26, BC-27, BC-29,
and BC-7 over the period of monitoring are shown on Figure 14. A greater fluctuation in water
level elevations in the monitoring wells located near the sediment basins (monitoring wells
BC-20, BC-21, and BC-25) can be seen on Figure 14 compared to the wells located away from
the sediment basins over the period of monitoring.
Sulfate concentrations and water level elevations in monitoring wells BC-20, BC-21, and BC-25
are shown on Figures 15,16, and 17,respectively. These figures generally show that increases
in sulfate concentrations measured during sampling event coincide with increased water level
elevations measured in each of these wells over the period of monitoring.
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The selenium concentrations in monitoring wells BC-20, BC-21, BC-25, BC-26, and BC-32 are
depicted on Figure 7.Review of Figure 7 indicates the selenium exceedance of 23.7 μg/L
measured in monitoring well BC-21 during the August 2013 sampling event followed by a
decrease to 2.69 μg/L in the following sampling event in November 2013. Monitoring well BC-25
shows a similar increase in selenium concentrations followed by decreases in concentrations
during the following sampling event. The increases and subsequent decreases in selenium
concentrations correspond to increases and subsequent decreases in the groundwater
elevations as shown on Figure 14.
3.5 Installation of Assessment Groundwater Monitoring Wells
Two pairs of nested groundwater monitoring wells were proposed for installation along the
northern side of the FGD Residue Landfill in the work plan. Each location was proposed to
consist of a shallow “S” and a deep “D” monitoring well (FGDLA-1S/D and FGDLA-2S/D).
The proposed location of these monitoring wells was between the existing landfill monitoring
wells with reported exceedances and the landfill limit of waste. Duke Energy later submitted an
amendment to the work plan to utilize previously installed groundwater monitoring wells at the
landfill to obtain the necessary data instead of installing the proposed wells. The amendment
was approved by NCDEQ in a letter dated February 24, 2017. The monitoring wells utilized for
analysis are BC-20, BC-21, BC-23A, BC-25, BC-28, BC-32, CCR-FGD-3S, CCR-FGD-3D,
CCR-FGD4S, CCR-FGD-4D, CCR-FGD-5S, and CCR-FGD-5D (Figure 18).
Shallow “BC” and “S” monitoring wells are defined as wells set to bracket the water table
surface at the time of installation. Deep “D” monitoring wells are defined as wells that are
screened within the partially weathered/fractured bedrock transition zone at the base of the
regolith.
Monitoring wells CCR-FGD-3S, CCR-FGD-3D, CCR-FGD-4S, CCR-FGD-4D, CCR-FGD-5S,
and CCR-FGD-5D are located between existing landfill monitoring wells with reported
exceedances and the landfill limit of waste.
The monitoring wells were sampled on March 8, 2017, and analyzed for the following
constituents by the methods identified in the work plan: arsenic, barium, boron, cadmium,
chloride, chromium, copper, fluoride, iron, lead, manganese, mercury, nickel, nitrate as nitrogen,
selenium, silver, sulfate, TDS, and zinc. A summary of the analytical results from the March
2017 sampling event are presented in Table 6.
3.5.1 Groundwater Analytical Results
Monitoring wells CCR-FGD-5S and CCR-FGD-5D are located near the limit of waste, between
monitoring well BC-32 and the landfill (Figure 18). The selenium, sulfate, and TDS results
reported in CCR-FGD-5S and CCR-FGD-5D were all less than the 2L Standards and less than
the concentrations reported in BC-32. Sulfate and TDS exceedances were reported in BC-32
during the March 2017 sampling event. If the source of selenium, sulfate, and TDS measured in
these monitoring wells was the landfill, it would be expected that the concentrations measured
in monitoring wells CCR-FGD-5S and CCR-FGD-5D would be greater than those measured in
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monitoring well BC-32. The following observations were made upon review of the March 2017
laboratory data:
x Monitoring wells CCR-FGD-4S and CCR-FGD-4D are located near the limit of waste
between monitoring well BC-20 and the landfill (Figure 18). The selenium, sulfate, and
TDS results reported in CCR-FGD-4S were less than the 2L Standards and less than the
concentrations reported in BC-20. Sulfate and TDS exceedances were reported in
CCR-FGD-4D and BC-20 during the March 2017 sampling event; however, the
concentrations reported in CCR-FGD-4D were less than those reported in BC-20. If the
source of selenium, sulfate, and TDS measured in these monitoring wells was the landfill,
it would be expected that the concentrations measured in monitoring wells CCR-FGD-4S
and CCR-FGD-4D would be greater than those measured in monitoring well BC-20.
x Monitoring wells CCR-FGD-3S and CCR-FGD-3D are located near the limit of waste
between monitoring wells BC-20 and BC-21 and the landfill (Figure 18). Selenium,
sulfate, and TDS results reported in CCR-FGD-3S and CCR-FGD-3D were less than the
2L Standards and less than the concentrations reported in BC-20 and BC-21. Sulfate and
TDS exceedances were reported in monitoring wells BC-20 and BC-21 during the
March 2017 sampling event. If the source of selenium, sulfate, and TDS measured in
these monitoring wells was the landfill, it would be expected that the concentrations
measured in monitoring wells CCR-FGD-3S and CCR-FGD-3D would be greater than
those measured in monitoring wells BC-20 and BC-21. A sulfate isoconcentration map is
presented as Figure 19.
3.5.2 Refined Groundwater Flow
On March 6, 2017, depth to groundwater was gauged in wells BC-7, BC-20, BC-21, BC-22,
BC-23A, BC-25, BC-26, BC-27, BC-28, BC-29, BC-31, BC-32, CCR-FGD-2S, CCR-FGD-2D,
CCR-FGD-3S, CCR-FGD-3D, CCR-FGD-4S, CCR-FGD-4D, CCR-FGD-5S, CCR-FGD-5D,
CCR-FGD-6S, CCR-FGD-6D, CCR-FGD-7S, and CCR-FGD-7D.
Inferred groundwater contours for the March 6, 2017, gauging event are presented
on Figure 20.
Groundwater flow in the northwest portion of the landfill is to the west and northwest toward
Belews Lake. This is consistent with the November 2016 inferred groundwater flow contours
presented on Figure 3 and with historical groundwater data at the landfill. If the source of
exceedances was the landfill, it would be expected that the monitoring wells closer to the landfill
(CCR-FGD-3S/D, CCR-FGD-4S/D, and CCR-FGD-5S/D) would have greater concentrations
reported than monitoring wells further from the landfill (BC-20, BC-21, BC-25, and BC-32).
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Section 4 – Conclusions and Recommendations
4.1 Conclusions
The following conclusions have been developed from the information presented in this
additional assessment report:
x Based on the selenium, sulfate, and TDS results reported during the March 2017 well
inspection and redevelopment sampling event, gypsum directly entering the monitoring
wells at the well heads from aerial deposition is not a significant contributor to the
exceedances reported in monitoring wells BC-20, BC-21, BC-25, or BC-32.
x Aerial deposition due to the historical gypsum stack-out area and landfill operations may
have contributed to the concentrations of sulfate and/or selenium reported in the near
surface soil samples in this portion of the site. The selenium and sulfate reported in the
soil may be contributing to concentrations of these constituents reported in groundwater.
x Comparing the datalogger results of water levels and conductivity readings in wells
BC-25 and BC28, there is not a direct correlation between water levels and conductivity
readings. However, the conductivity readings in BC-25 are greater than those reported in
BC-28. Also, the variability of both groundwater elevations and conductivity readings in
BC-25 are greater than those reported in BC-28, which maintained relatively constant
water level and conductivity readings over the period the dataloggers were installed. The
proximity of sediment basin SB-6 adjacent to BC-25 may influence the greater variability
in groundwater elevations compared to BC-28 which is not located near a sediment
basin.
x Concentrations of selenium, sulfate, and TDS were less in monitoring wells closer to the
landfill (e.g., BC-32) than in wells farther from the landfill (e.g., BC-25). If the source of
the exceedances were the landfill, it would be expected that the concentrations measured
in the monitoring wells closer to the landfill would be greater than those measured in
monitoring wells further from the landfill.
x The following maintenance and housekeeping activities were implemented in October
2015 to minimize fugitive dust at the gypsum stack-out area:
o Asphalt paving and sealing of the area under the radial stacker
o Installation of curbing along the non-ditched portion of the pad road perimeter
o Cleaning and flushing of the subsurface drainage system
o Extension of the vertical spray guards at the wheel wash
o Sealing of perimeter road and ditchline cracks
o Concrete paving of some perimeter exposed areas
o Affixing the pad liner to the interior of the perimeter road
o Addition of a dedicated water truck for road cleaning and dust control
o No loading in the scale area
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Section 4 –Conclusions and Recommendations
22
If fugitive dust was the cause of the historical increases in concentrations reported at SW-1, the
concentrations of sulfate and TDS should continue to decrease or remain stable at the SW-1
sample location.
4.2 Recommendations
Aerial deposition from historical operations at the landfill and gypsum stack-out area may have
contributed to the concentrations of sulfate and/or selenium reported in near-surface soil
samples in this portion of the site. The selenium and sulfate reported in the soil may be
contributing to concentrations of these constituents in groundwater.
Maintenance and housekeeping activities (as previously mentioned) at the gypsum stack-out
area were updated in October 2015. These activities included engineering controls,
maintenance and dust control measures. If fugitive dust and aerial deposition of selenium and
sulfate represent a source for groundwater and surface water exceedances, implementation and
maintenance of the dust control system should result in a reduction of constituent
concentrations in groundwater and surface water over time. A reduction in sulfate concentration
in sample SW-1 was observed from the May 2016 to March 2017 sampling event.
It is recommended that monitoring of groundwater and surface water continue for four
semi-annual sampling events to evaluate if constituent concentrations continue to decline. If
constituent concentrations increase at a given sample location in three consecutive events,
additional assessment may be warranted.
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
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f
t
)

Fi
g
u
r
e

1
1

-

B
e
l
e
w
s

C
r
e
e
k

F
G
D

R
e
s
i
d
u
e

L
a
n
d
f
i
l
l

BC
-
2
8

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
s

a
n
d

C
o
n
d
u
c
t
i
v
i
t
y

Gr
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
Co
n
d
u
c
t
i
v
i
t
y
00.
0
5
0.
1
0.
1
5
0.
2
0.
2
5
0.
3
0.
3
5
0.
4
0.
4
5
0.
5
72
8
.
0
72
8
.
5
72
9
.
0
72
9
.
5
73
0
.
0
73
0
.
5
73
1
.
0
11
/
2
9

1
2
/
9

1
2
/
1
9

1
2
/
2
9

1
/
8

1
/
1
8

1
/
2
8
P
r
e
c
i
p
i
t
a
t
i
o
n

(
i
n
)

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n

(
f
t
)

Fi
g
u
r
e

1
2

-

B
e
l
e
w
s

C
r
e
e
k

F
G
D

R
e
s
i
d
u
e

L
a
n
d
f
i
l
l

BC
-
2
5

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
s

a
n
d

P
r
e
c
i
p
i
t
a
t
i
o
n

Gr
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
Pr
e
c
i
p
i
t
a
t
i
o
n
00.
0
5
0.
1
0.
1
5
0.
2
0.
2
5
0.
3
0.
3
5
0.
4
0.
4
5
0.
5
76
7
.
0
76
7
.
5
76
8
.
0
76
8
.
5
76
9
.
0
76
9
.
5
77
0
.
0
11
/
2
6

1
2
/
6

1
2
/
1
6

1
2
/
2
6

1
/
5

1
/
1
5

1
/
2
5

2
/
4

2
/
1
4
P
r
e
c
i
p
i
t
a
t
i
o
n

(
i
n
)

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n

(
f
t
)

Fi
g
u
r
e

1
3

-

B
e
l
e
w
s

C
r
e
e
k

F
G
D

R
e
s
i
d
u
e

L
a
n
d
f
i
l
l

BC
-
2
8

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
s

a
n
d

P
r
e
c
i
p
i
t
a
t
i
o
n

Gr
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
Pr
e
c
i
p
i
t
a
t
i
o
n
72
5
73
0
73
5
74
0
74
5
75
0
No
v
-
0
7

N
o
v
-
0
8

N
o
v
-
0
9

N
o
v
-
1
0

N
o
v
-
1
1

N
o
v
-
1
2

N
o
v
-
1
3

N
o
v
-
1
4

N
o
v
-
1
5

N
o
v
-
1
6
Fe
e
t

Fi
g
u
r
e

1
4

-

B
e
l
e
w
s

C
r
e
e
k

F
G
D

R
e
s
i
d
u
e

L
a
n
d
f
i
l
l

BC
-
2
0
,

B
C
-
2
1
,

B
C
-
2
5
,

B
C
-
2
6
,

B
C
-
2
7
,

B
C
-
2
9
,

a
n
d

B
C
-
7

Gr
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
s

BC
-
2
0
BC
-
2
1
BC
-
2
5
BC
-
2
6
BC
-
2
7
BC
-
2
9
BC
-
7
72
8
73
0
73
2
73
4
73
6
73
8
74
0
74
2
74
4
74
6
74
8
0
10
0
0
0
0
20
0
0
0
0
30
0
0
0
0
40
0
0
0
0
50
0
0
0
0
60
0
0
0
0
No
v
-
0
7

N
o
v
-
0
8

N
o
v
-
0
9

N
o
v
-
1
0

N
o
v
-
1
1

N
o
v
-
1
2

N
o
v
-
1
3

N
o
v
-
1
4

N
o
v
-
1
5

N
o
v
-
1
6
Fe
e
t

μ g/
L

Fi
g
u
r
e

1
5

-

B
e
l
e
w
s

C
r
e
e
k

F
G
D

R
e
s
i
d
u
e

L
a
n
d
f
i
l
l

BC
-
2
0

Su
l
f
a
t
e

C
o
n
c
e
n
t
r
a
t
i
o
n
s

a
n
d

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
s

NC
A
C

1
5
A
-
2
L
SO
4
,

t
o
t
a
l

(
μ g/
L
)
Gr
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n

(
f
e
e
t
)
2L

S
t
a
n
d
a
r
d

f
o
r

S
u
l
f
a
t
e

=

2
5
0
,
0
0
0

μ g/
L

72
8
73
3
73
8
74
3
74
8
75
3
0
10
0
0
0
0
20
0
0
0
0
30
0
0
0
0
40
0
0
0
0
50
0
0
0
0
60
0
0
0
0
70
0
0
0
0
80
0
0
0
0
No
v
-
0
7

N
o
v
-
0
8

N
o
v
-
0
9

N
o
v
-
1
0

N
o
v
-
1
1

N
o
v
-
1
2

N
o
v
-
1
3

N
o
v
-
1
4

N
o
v
-
1
5

N
o
v
-
1
6
Fe
e
t

ug
/
L

Fi
g
u
r
e

1
6

-

B
e
l
e
w
s

C
r
e
e
k

F
G
D

R
e
s
i
d
u
e

L
a
n
d
f
i
l
l

BC
-
2
1

Su
l
f
a
t
e

C
o
n
c
e
n
t
r
a
t
i
o
n
s

a
n
d

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
s

NC
A
C

1
5
A
-
2
L
SO
4
,

t
o
t
a
l

(
μ g/
L
)
Gr
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n

(
f
e
e
t
)
2L

S
t
a
n
d
a
r
d

f
o
r

S
u
l
f
a
t
e

=

2
5
0
,
0
0
0

μ g/
L

μ g/
L

72
8
73
0
73
2
73
4
73
6
73
8
74
0
74
2
74
4
74
6
74
8
0
20
0
0
0
0
40
0
0
0
0
60
0
0
0
0
80
0
0
0
0
10
0
0
0
0
0
12
0
0
0
0
0
14
0
0
0
0
0
No
v
-
0
7

N
o
v
-
0
8

N
o
v
-
0
9

N
o
v
-
1
0

N
o
v
-
1
1

N
o
v
-
1
2

N
o
v
-
1
3

N
o
v
-
1
4

N
o
v
-
1
5

N
o
v
-
1
6
Fe
e
t

ug
/
L

Fi
g
u
r
e

1
7

-

B
e
l
e
w
s

C
r
e
e
k

F
G
D

R
e
s
i
d
u
e

L
a
n
d
f
i
l
l

BC
-
2
5

Su
l
f
a
t
e

C
o
n
c
e
n
t
r
a
t
i
o
n
s

a
n
d

G
r
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n
s

NC
A
C

1
5
A
-
2
L
SO
4
,

t
o
t
a
l

(
μ g/
L
)
Gr
o
u
n
d
w
a
t
e
r

E
l
e
v
a
t
i
o
n

(
f
e
e
t
)
2L

S
t
a
n
d
a
r
d

f
o
r

S
u
l
f
a
t
e

=

2
5
0
,
0
0
0

μ g/
L

μ g/
Duke Energy Carolinas, LLC |Additional Assessment of Groundwater Exceedances
Belews Creek Steam Station FGD Landfill, Permit No. 8505
Tables
T T a b l e 1
S e l e c t e d S u l f a t e A n a l y t i c a l R e s u l t s f o r
M o n i t o r i n g W e l l s B C -2 0 , B C -2 1 , B C -2 5 , B C -2 6 , a n d B C -3 2
D u k e E n e r g y C a r o l i n a s L L C /B e l e w s C r e e k S t e a m S t a t i o n
F G D R e s i d u e L a n d f i l l , P e r m i t N o . 8 5 0 5
Pa
g
e

1

o
f

1
BC
-
2
0
34
,
0
8
0
10
4
,
0
0
0

7
1
,
2
0
0

4
7
5
,
0
0
0

2
7
1
,
0
0
0

1
6
8
,
0
0
0

5
5
4
,
0
0
0

2
2
6
,
0
0
0

5
0
6
,
0
0
0

4
9
2
,
0
0
0

5
4
0
,
0
0
0

5
3
7
,
0
0
0

5
7
1
,
0
0
0
μ g/
L
BC
-
2
1
85
,
4
0
0
18
5
,
0
0
0

9
1
,
5
0
0

4
8
7
,
0
0
0

4
9
6
,
0
0
0

1
7
3
,
0
0
0

5
6
9
,
0
0
0

3
5
5
,
0
0
0

7
0
1
,
0
0
0

4
5
3
,
0
0
0

4
9
8
,
0
0
0

3
6
4
,
0
0
0

4
2
6
,
0
0
0
μ g/
L
BC
-
2
5
35
3
,
0
0
0
42
8
,
0
0
0

3
9
4
,
0
0
0

9
3
0
,
0
0
0

8
5
8
,
0
0
0

6
5
7
,
0
0
0

9
1
7
,
0
0
0

8
5
3
,
0
0
0

1
,
1
9
0
,
0
0
0

1
,
1
5
0
,
0
0
0

9
9
9
,
0
0
0

9
6
7
,
0
0
0

8
8
7
,
0
0
0
μ g/
L
BC
-
2
6
19
,
7
6
0
20
,
2
0
0

1
6
,
5
0
0

1
7
,
3
0
0

N
S

1
5
,
9
0
0

1
7
,
6
0
0

1
4
,
9
0
0

1
6
,
1
0
0

1
2
,
8
0
0

1
4
,
5
0
0

2
6
,
0
0
0

N
S
μ g/
L
BC
-
3
2
NS
NS

N
S

N
S

4
9
0
,
0
0
0

5
1
7
,
0
0
0

7
0
7
,
0
0
0

7
1
7
,
0
0
0

7
5
3
,
0
0
0

8
5
4
,
0
0
0

9
4
9
,
0
0
0

9
5
4
,
0
0
0

9
1
6
,
0
0
0
μ g/
L
No
t
e
s
:
1
.

μ g/
L

i
n
d
i
c
a
t
e
s

m
i
c
r
o
g
r
a
m
s

p
e
r

l
i
t
e
r
.
2
.

1
5
A

N
C
A
C

2
L

S
t
a
n
d
a
r
d

r
e
f
e
r
s

t
o

C
l
a
s
s

G
A

S
t
a
n
d
a
r
d
s

a
s

f
o
u
n
d

i
n

1
5
A

N
C
A
C

0
2
L
.

0
2
0
2

G
r
o
u
n
d
w
a
t
e
r

Q
u
a
l
i
t
y

S
t
a
n
d
a
r
d
s
,

l
a
s
t

a
m
e
n
d
e
d o
n

A
p
r
i
l

1
,

2
0
1
3
.

3
.

S
h
a
d
e
d

r
e
s
u
l
t
s

i
n
d
i
c
a
t
e

v
a
l
u
e
s

t
h
a
t

a
t
t
a
i
n

o
r

e
x
c
e
e
d

t
h
e

1
5
A

N
C
A
C

2
L

S
t
a
n
d
a
r
d
.
4
.

N
S

i
n
d
i
c
a
t
e
s

n
o
t

s
a
m
p
l
e
d
.
5
.

C
o
n
c
e
n
t
r
a
t
i
o
n
s

b
a
s
e
d

o
n

d
a
t
a

i
n

D
u
k
e

E
n
e
r
g
y

C
a
r
o
l
i
n
a
s
,

L
L
C

a
n
a
l
y
t
i
c
a
l

r
e
s
u
l
t
s

d
a
t
a
b
a
s
e
.
We
l
l

I
D
No
v
e
m
b
e
r

7
,

20
1
1

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

8
,

20
1
2

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Un
i
t
s
Au
g
u
s
t

1
9
,

20
1
3

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

7
,

20
1
4

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

3
,

20
1
6

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

4
,

20
1
6

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

4
,

20
1
5

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

6
,

20
1
5

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

1
2
,

20
1
4

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
r
c
h

8
,

20
1
7

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
25
0
,
0
0
0
No
v
e
m
b
e
r

2
6
,

20
1
2
An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

1
4
,

20
1
3

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

2
5
-
2
6
,

20
1
3
An
a
l
y
t
i
c
a
l
R
e
s
u
l
t
s
15
A

N
C
A
C

2
L

St
a
n
d
a
r
d
TTable 2
Groundwater Analytical Results
Background Monitoring Wells
Duke Energy Carolinas LLC/Belews Creek Steam Station
FGD Residue Landfill, Permit No. 8505
Page 1 of 1
Analyte
Unit
CAS Number
NCDEQ 2L
Sample ID BC-23A BC-28 BC-23A BC-28 BC-23A BC-28
Maximum 630 466 138,000 81000
Minimum 184 <100 44,000 36000
Collection
Date
11/6/2007 630 100 U 61,000 72,000 2 U 2 U
5/19/2008 5000 U 5000 U 74,000 68,000 10 U 10 U
11/5/2008 5000 U 5000 U 52,000 36,000 10 U 10 U
5/6/2009 5000 U 5000 U 138,000 70,000 10 U 10 U
11/17/2009 5000 U 5000 U 72,000 62,000 10 U 10 U
5/17/2010 5000 U 5000 U 56,000 64,000 10 U 10 U
11/29/2010 5000 U 5000 U 44,000 44,000 10 U 10 U
5/16/2011 302 311 67,000 51,000 1 U 1 U
11/7/2011 374.3 347.2 94,000 81,000 1 U 1 U
5/8/2012 405 377 52,000 61,000 1 U 1 U
11/26/2012 225 422 53,000 61,000 1 U 1 U
5/13/2013 329 442 51,000 65,000 1 U 1 U
11/26/2013 237 466 58,000 70,000 1 U 1 U
5/7/2014 196 363 65,000 70,000 1 U 1 U
11/12/2014 203 298 49,000 68,000 1 U 1 U
5/6/2015 189 299 57,000 63,000 1 U 1 U
11/4/2015 227 338 64,000 73,000 1 U 1 U
5/4/2016 273 398 51,000 70,000 1 U 1 U
11/3/2016 184 271 54,000 55,000 1 U 1 U
Notes:
1.
2.
3.
4.
5.
10 U
1 U
μg/L indicates micrograms per liter
15A NCAC 2L Standard refers to Class GA Standards as found in 15A NCAC 02L. 0202
Selenium
μg/L
7782-49-2
20
TDS
μg/L
--
500,000
Sulfate
μg/L
14808-79-8
250,000
Groundwater Quality Standards, last amended on April 1, 2013
Concentrations based on data in Duke Energy Carolinas, LLC analytical results database
U indicates the result was not detected at a concentration which attains or exceeds the
laboratory method reporting limit (MRL).
TDS indicates total dissolved solids.
T T a b l e 3
S e l e c t e d T D S A n a l y t i c a l R e s u l t s f o r
M o n i t o r i n g W e l l s B C -2 0 , B C -2 1 , B C -2 5 , B C -2 6 , a n d B C -3 2
D u k e E n e r g y C a r o l i n a s L L C /B e l e w s C r e e k S t e a m S t a t i o n
F G D R e s i d u e L a n d f i l l , P e r m i t N o . 8 5 0 5
Pa
g
e

1

o
f

1
BC
-
2
0
16
8
,
0
0
0
24
6
,
0
0
0

2
1
4
,
0
0
0

7
7
2
,
0
0
0

4
8
5
,
0
0
0

3
2
3
,
0
0
0

8
3
8
,
0
0
0

3
8
6
,
0
0
0

7
3
0
,
0
0
0

7
8
0
,
0
0
0

8
2
5
,
0
0
0

8
1
2
,
0
0
0

8
5
6
,
0
0
0
μ g/
L
BC
-
2
1
26
1
,
0
0
0
39
1
,
0
0
0

2
2
4
,
0
0
0

8
0
0
,
0
0
0

8
2
9
,
0
0
0

3
3
0
,
0
0
0

8
5
0
,
0
0
0

5
7
9
,
0
0
0

7
0
1
,
0
0
0

7
1
9
,
0
0
0

7
7
5
,
0
0
0

5
4
4
,
0
0
0

6
9
6
,
0
0
0
μ g/
L
BC
-
2
5
62
3
,
0
0
0
71
9
,
0
0
0

6
6
8
,
0
0
0

1
,
4
8
0
,
0
0
0

1
,
4
1
0
,
0
0
0

1
,
0
3
0
,
0
0
0

1
,
4
0
0
,
0
0
0

1
,
2
8
0
,
0
0
0

1
,
7
4
0
,
0
0
0

1
,
8
1
0
,
0
0
0

1
,
5
6
0
,
0
0
0

1
,
3
2
0
,
0
0
0

1
,
3
5
0
,
0
0
0
μ g/
L
BC
-
2
6
91
,
0
0
0
80
,
0
0
0

7
8
,
0
0
0

9
5
,
0
0
0

N
S

9
6
,
0
0
0

1
0
2
,
0
0
0

9
0
,
0
0
0

9
7
,
0
0
0

1
1
4
,
0
0
0

1
0
4
,
0
0
0

1
2
2
,
0
0
0

N
S
μ g/
L
BC
-
3
2
NS
NS

N
S

N
S

7
8
9
,
0
0
0

7
9
4
,
0
0
0

1
,
1
1
0
,
0
0
0

1
,
1
0
0
,
0
0
0

1
,
1
2
0
,
0
0
0

1
,
2
7
0
,
0
0
0

1
,
3
8
0
,
0
0
0

1
,
3
3
0
,
0
0
0

1
,
2
5
0
,
0
0
0
μ g/
L
No
t
e
s
:
1
.

μ g/
L

i
n
d
i
c
a
t
e
s

m
i
c
r
o
g
r
a
m
s

p
e
r

l
i
t
e
r
.
2
.

1
5
A

N
C
A
C

2
L

S
t
a
n
d
a
r
d

r
e
f
e
r
s

t
o

C
l
a
s
s

G
A

S
t
a
n
d
a
r
d
s

a
s

f
o
u
n
d

i
n

1
5
A

N
C
A
C

0
2
L
.

02
0
2

G
r
o
un
d
w
a
t
e
r

Q
u
a
l
i
t
y

S
t
a
n
d
a
r
d
s
,

l
a
s
t

a
m
e
n
d
e
d

o
n

A
p
r
i
l

1
,

20
1
3
.

3
.

S
h
a
d
e
d

r
e
s
u
l
t
s

i
n
d
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c
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t
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v
a
l
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s

t
h
a
t

a
t
t
a
i
n

o
r

e
x
c
e
e
d

t
h
e

1
5
A

N
C
A
C

2
L

S
t
a
n
d
a
r
d
.
4
.

N
S

i
n
d
i
c
a
t
e
s

n
o
t

s
a
m
p
l
e
d
.
5
.

C
o
n
c
e
n
t
r
a
t
i
o
n
s

b
a
s
e
d

o
n

d
a
t
a

i
n

D
u
k
e

E
n
e
r
g
y

C
a
r
o
l
i
n
a
s
,

L
L
C

a
n
a
l
y
t
i
c
a
l

r
e
s
u
l
t
s

d
a
t
a
b
a
s
e
.
Au
g
u
s
t

1
9
,

20
1
3

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

3
,

20
1
6

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

4
,

20
1
6

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

4
,

20
1
5

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

6
,

20
1
5

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

1
2
,

20
1
4

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

7
,

20
1
4

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
We
l
l

I
D
No
v
e
m
b
e
r

7
,

20
1
1

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

8
,

20
1
2

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

2
6
,

20
1
2
An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

1
4
,

20
1
3

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
r
c
h

8
,

20
1
7

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

2
5
-
2
6
,

20
1
3
An
a
l
y
t
i
c
a
l
R
e
s
u
l
t
s
Un
i
t
s
15
A

N
C
A
C

2L

St
a
n
d
a
r
d
50
0
,
0
0
0
T T a b l e 4
S e l e c t e d S e l e n i u m A n a l y t i c a l R e s u l t s f o r
M o n i t o r i n g W e l l s B C -2 0 , B C -2 1 , B C -2 5 , B C -2 6 , a n d B C -3 2
D u k e E n e r g y C a r o l i n a s L L C /B e l e w s C r e e k S t e a m S t a t i o n
F G D R e s i d u e L a n d f i l l , P e r m i t N o . 8 5 0 5
Pa
g
e

1

o
f

1
BC
-
2
0
1
U
1
U

1
.
1
8

2
.
1
9

1
.
9
6

1
.
7
8

2
.
8

2
.
4

2
.
5
1

2
.
2
4

3
.
9
6

3
.
8
5

4
.
5
μ g/
L
BC
-
2
1
1
U
3.
3

2
.
5
5

1
.
3
6

2
3
.
7

2
.
6
9

1
.
6
1

1
.
8
1

3
.
4
2

1
.
7
7

0
.
8
6
4

J

0
.
9
6
8

J

1
9
.
1
μ g/
L
BC
-
2
5
1.9
2
3.
4
5

3
.
7
0

1
9
.
2

1
4
.
1

7
.
9
8

1
9
13
.
1

2
0
.
3

2
1
.
9

1
2
.
4

9
.
7

1
0
.
0
μ g/
L
BC
-
2
6
1
U
1
U

1

U

1

U

N
S

1

U

0
.
1
1
7

J

0
.
0
9
2

U

0
.
0
9
2

U

0
.
1
1
7

J

0
.
0
9
2

U

0
.
1
3
7

J

N
S
μ g/
L
BC
-
3
2
NS
NS

N
S

N
S

6
.
0
3

5
.
7
2

5
.
6
7

3
.
9
6

6
.
5

5
.
9
8

5
.
7
8

4
.
2
1

4
.
4
μ g/
L
No
t
e
s
:
1
.

μ g/
L

i
n
d
i
c
a
t
e
s

m
i
c
r
o
g
r
a
m
s

p
e
r

l
i
t
e
r
.
2
.

1
5
A

N
C
A
C

2
L

S
t
a
n
d
a
r
d

r
e
f
e
r
s

t
o

C
l
a
s
s

G
A

S
t
a
n
d
a
r
d
s

a
s

f
o
u
n
d

i
n

1
5
A

N
C
A
C

0
2
L
.

02
0
2

G
r
o
un
d
w
a
t
e
r

Q
u
a
l
i
t
y

S
t
a
n
d
a
r
d
s
,

l
a
s
t

a
m
e
n
d
e
d

o
n

A
p
r
i
l

1
,

20
1
3
.

3
.

S
h
a
d
e
d

r
e
s
u
l
t
s

i
n
d
i
c
a
t
e

v
a
l
u
e
s

t
h
a
t

a
t
t
a
i
n

o
r

e
x
c
e
e
d

t
h
e

1
5
A

N
C
A
C

2
L

S
t
a
n
d
a
r
d
.
4
.

N
S

i
n
d
i
c
a
t
e
s

n
o
t

s
a
m
p
l
e
d
.
5
.

C
o
n
c
e
n
t
r
a
t
i
o
n
s

b
a
s
e
d

o
n

d
a
t
a

i
n

D
u
k
e

E
n
e
r
g
y

C
a
r
o
l
i
n
a
s
,

L
L
C

a
n
a
l
y
t
i
c
a
l

r
e
s
u
l
t
s

d
a
t
a
b
a
s
e
.
6
.

U

i
n
d
i
c
a
t
e
s

t
h
e

r
e
s
u
l
t

w
a
s

n
o
t

d
e
t
e
c
t
e
d

a
t

a

c
o
n
c
e
n
t
r
a
t
i
o
n

wh
i
c
h

a
t
t
a
i
n
s

o
r

e
x
c
e
e
d
s

t
h
e

l
a
b
o
ra
t
o
r
y

m
e
t
h
o
d

r
e
p
o
r
t
i
n
g

l
i
m
i
t

(
MR
L
)
.
7
.

J

i
n
d
i
c
a
t
e
s

a
n

l
a
b
o
r
a
t
o
r
y

e
s
t
i
m
a
t
e
d

c
o
n
c
e
n
t
r
a
t
i
o
n

w
h
i
c
h

e
q
u
a
l

o
r

a
r
e

g
r
e
a
t
e
r

t
h
a
n

t
h
e

m
e
t
h
o
d

d
e
t
e
c
t
i
o
n

l
i
m
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t

b
u
t

a
r
e

l
e
s
s

t
ha
n

t
h
e

l
a
b
o
r
a
t
o
r
y
'
s

M
R
L
.
No
v
e
m
b
e
r

2
5
-
2
6
,

20
1
3
An
a
l
y
t
i
c
a
l
R
e
s
u
l
t
s
Un
i
t
s
15
A

NC
A
C

2
L

St
a
n
d
a
r
d
20
Ma
r
c
h

8
,

20
1
7

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
We
l
l

I
D
No
v
e
m
b
e
r

7
,

20
1
1

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

8
,

20
1
2

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

2
6
,

20
1
2
An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

1
4
,

20
1
3

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Au
g
u
s
t

1
9
,

20
1
3

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

3
,

20
1
6

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
Ma
y

4
,

20
1
6

An
a
l
y
t
i
c
a
l

Re
s
u
l
t
s
No
v
e
m
b
e
r

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Table 5:
Summary of Soil Analytical Results
Duke Energy Carolinas LLC/Belews Creek Steam Station
FGD Residue Landfill, Permit No. 8505
Page 1 of 1
Boron Chloride Fluoride Iron Manganese Selenium Sulfate
mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
7440-42-8 16887-00-6 16984-48-8 7439-89-6 7439-96-5 7782-49-2 14808-79-8
46,000 NS 9,400 100,000 5,200 1,160 NS
45 NS NS 150 65 2.1 NS
Sample ID Collection Date
FGDSB-1 (0-0.5)11/9/2016 1.04 U 3.10 5.45 23,600 313 2.20 714
FGDSB-1 (1)11/9/2016 1.90 1.98 1.74 26,600 411 1.17 1,310
FGDSB-1 (2)11/9/2016 1.09 U 1.60 0.450 11,500 221 1.74 150
FGDSB-1 (3)11/9/2016 1.20 U 5.10 0.419 U 8,250 281 1.94 392
FGDSB-1 (5)11/9/2016 1.19 U 5.86 0.405 U 5,500 146 0.479 334
FGDSB-2 (0-0.5)11/9/2016 1.03 U 2.38 4.59 20,900 333 3.58 4,510
FGDSB-2 (1)11/9/2016 1.07 U 3.20 2.20 34,400 161 3.23 2,970
FGDSB-2 (2)11/9/2016 1.13 U 7.51 0.889 70,500 590 7.23 940
FGDSB-3 (0-0.5)11/9/2016 1.09 U 3.82 3.69 22,300 393 1.87 6,260
FGDSB-3 (1)11/9/2016 1.04 U 2.56 0.627 20,300 632 1.95 2,440
FGDSB-4 (0-0.5)11/9/2016 1.10 U 4.49 8.52 27,300 173 5.90 14,400
FGDSB-5 (0-0.5)11/9/2016 1.34 U 9.04 7.75 40,700 376 5.52 18,100
FGDSB-5 (1)11/9/2016 1.11 U 4.65 1.15 15,300 576 2.37 1,990
FGDSB-5 (2)11/9/2016 1.03 U 5.13 0.365 U 20,700 287 1.86 800
FGDSB-5 (3)11/9/2016 1.05 U 2.08 0.516 11,900 273 2.89 756
FGDSB-6 (0-0.5)11/9/2016 1.14 U 3.56 0.385 U 22,400 390 2.62 338
FGDSB-6 (1)11/9/2016 1.11 U 1.71 0.368 U 12,500 329 1.86 107
FGDSB-7 (0-0.5)11/10/2016 1.49 2.23 3.10 24,500 350 2.05 379
FGDSB-7 (1)11/10/2016 1.12 1.49 3.07 15,700 350 2.54 44.5
FGDSB-8 (0-0.5)11/10/2016 1.17 U 2.55 7.28 25,400 410 3.58 8,610
FGDSB-8 (1)11/10/2016 1.11 U 1.68 0.630 29,500 543 1.84 100
FGDSB-8 (2)11/10/2016 1.12 U 2.63 0.385 U 26,000 907 2.30 174
FGDSB-8 (3)11/10/2016 1.10 U 1.90 0.377 U 22,300 239 2.00 114
FGDSB-9 (0-0.5)11/10/2016 1.20 U 1.87 1.47 21,200 337 2.96 93.6
FGDSB-9 (1)11/10/2016 1.13 U 1.87 0.550 9,690 62.9 0.977 22.7
FGDSB-9 (2)11/10/2016 1.20 U 2.77 0.403 U 9,520 51.3 2.53 37.6
FGDSB-9 (3)11/10/2016 1.19 U 1.92 0.394 U 11,300 110 2.98 44.5
FGDSB-9 (5)11/10/2016 1.19 U 2.24 0.399 U 11,200 56.2 1.58 34.8
FGDSB-10 (0-0.5)11/10/2016 1.08 U 2.43 1.76 21,100 343 1.31 45.6
FGDSB-11 (0-0.5)11/10/2016 1.08 U 9.54 0.460 20,400 201 2.08 3,460
FGDSB-11 (1)11/10/2016 1.08 U 6.51 0.359 U 28,900 366 2.28 858
FGDSB-11 (2)11/10/2016 1.14 U 5.52 0.380 U 22,100 482 2.67 100
FGDSB-11 (3)11/10/2016 1.23 U 12.2 0.414 U 37,600 177 1.03 18.0
FGDSB-11 (4)11/10/2016 1.16 U 3.86 0.389 U 38,800 592 1.48 92.6
FGDSB-12 (0-0.5)11/10/2016 1.06 U 32.7 0.485 21,100 172 2.78 3,410
FGDSB-13 (0-0.5)11/10/2016 1.13 U 5.83 2.44 26,100 534 1.71 54.0
FGDSB-13 (1)11/10/2016 1.11 U 4.84 1.16 27,200 505 1.62 119
FGDSB-13 (2)11/10/2016 1.06 U 2.26 4.15 26,400 458 1.43 259
FGDSB-14 (0-0.5)11/9/2016 1.26 U 2.17 6.23 18,600 558 9.35 17,400
FGDSB-15 (0-0.5)11/9/2016 1.05 U 1.67 3.79 22,300 319 6.35 13,100
FGDSB-15 (1)11/9/2016 1.14 U 2.66 10.1 15,200 208 9.65 15,700
FGDSB-15 (2)11/9/2016 2.16 1.60 8.94 23,000 398 5.00 13,200
FGDSB-16 (0-0.5)11/10/2016 1.57 2.37 5.32 39,500 477 7.12 7,010
FGDSB-16 (1)11/10/2016 1.08 U 1.62 1.89 7,610 96.6 2.37 133
FGDSB-16 (2)11/10/2016 1.00 U 1.38 3.03 7,180 125 0.859 53.6
FGDSB-16 (3)11/10/2016 1.08 U 0.774 U 2.97 10,700 136 2.85 105
FGDSB-16 (5)11/10/2016 1.08 U 2.40 0.367 U 8,350 126 1.02 102
FGDSB-17 (0-0.5)11/9/2016 1.26 U 4.32 5.67 30,700 435 3.43 6,910
FGDSB-17 (1)11/9/2016 1.01 U 2.14 0.994 18,700 165 1.34 231
FGDSB-18 (0-0.5)11/10/2016 1.21 U 3.10 1.59 27,300 388 2.20 122
FGDSB-18 (1)11/10/2016 1.04 U 1.61 0.961 8,690 123 1.37 52.2
FGDBGSB-1 (0-0.5)11/10/2016 0.984 U 3.15 0.699 21,600 335 0.717 42.6
FGDBGSB-1 (1)11/10/2016 1.08 U 2.91 0.360 U 22,700 512 1.00 33.3
FGDBGSB-1 (2)11/10/2016 1.25 U 12.5 0.426 U 51,800 102 0.966 8.76
FGDBGSB-1 (3)11/10/2016 1.23 U 17.3 0.427 U 38,600 89.4 0.974 1.67 U
FGDBGSB-1 (5)11/10/2016 1.23 U 16.3 0.429 U 34,200 92.0 1.24 2.67
Notes:
1.
2.
3.
4.
5.
mg/kg indicates milligram per kilogram
NS indicates no standard
U indicates the results were not detected at concentrations which equal the laboratory's method detection limit (MDL)
A bolded and shaded result indicates an exceedance of the Protection of Groundwater Preliminary Soil Remediation Goal (PSRG)
The number(s) in parenthesis in the sample ID represent the approximate depth below ground surface (bgs) the sample was collected
Analyte
Unit
CAS Number
Industrial Health PSRG
Protection of Groundwater PSRG
Duke Energy Carolinas, LLC | Additional Assessment of Groundwater Exceedances Belews Creek Steam Station FGD Landfill, Permit No. 8505

A
Appendix A
Well Inspection Forms
and Redevelopment
Logs

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\03. FGD Landfill additional assessment\Field Work\inspection forms\BC-20.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 60

WELL ID: BC-20 Redevelopment
Recommended?
☒ Yes (as instructed) ☐ No
Inspection Photos

Measured DTW: 18.21FT
Measured TD: 24.49 FT
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD
Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- GRASS MOWED AROUND WELL
- TAGGED SOFT BOTTOM, SEDIMENT ON END OF WL TAPE
- SOME BUILD UP IN BOTTOM OF WELL
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- BOLLARDS IN PLACE, WELL IS LOCKED, TAG OK
- PORTONS OF INTERIOR OF TUBING W/ DEDICATED PUMP HAS A GREENISH/YELLOW FILM
(ALMOST NEON)
- SCREEN: 14.22’ - 24.22’ (4’ OF OPEN SCREEN ABOVE WATER TABLE)
- SEE DEVELOPMENT LOG FOR FUTHER DETAILS

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-21.docxP:\Duke Energy
Progress.1026\20. BELEWS CREEK\03. FGD Landfill additional assessment\Field Work\inspection forms\BC-21.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 65

WELL ID: BC-21 Redevelopment
Recommended?
☒ Yes (as instructed) ☐ No
Inspection Photo

Measured DTW: 13.36
Measured TD: 16.99
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD
Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL). PINK SPRAY PAINT
IN TOP OF PVC RISER.
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- GRASS MOWED AROUND WELL
- SOFT TAG IN BOTTOM OF WELL CAP
- HARD TAG ON LIP OF BOTTOM SCREEN
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- SCREENED: 6.77’ - 16.77’; ABOUT 7’ OF OPEN SCREEN ABOVE WATER TABLE
- BOLLARDS IN PLACE, WELL IS LOCKED, TAG OK
- WELL VOLUME = 0.6 GALLONS (SEE DEVELOPMENT LOG FOR DETAILS)
- SEDIMENT-RICH WATER BUT BEGAN TO CLEAR UP AFTER 10-15 WELL VOLUMES
- SEE DEVELOPMENT LOG FOR FURTHER DETAILS

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-22.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 65

WELL ID: BC-22 Redevelopment
Recommended?
☐ Yes ☒ No
Inspection Photos

Measured DTW: 5.39’
Measured TD: 13.00’
Condition of Protective
Casing:
GOOD – 6” X 6” STEEL CASING
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD
Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- GRASS MOWED AROUND WELL.
- REMOVED MINOR DEBRIS FROM WELL PAD.

Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):

- SCREEN: 3’ - 13’ = APPROX. 2’ OF OPEN SCREEN ABOVE WATER TABLE
- NO BOLLARDS, LOCK OK, TAG OK
- DEDICATED PUMP CAP LARGER THAN 2” RISER, NOT ABLE TO INSTALL NEOPRENE SEAL CAP
- DID NOT PULL DEDICATED PUMP, NO TURBIDITY ISSUES INDICATED IN DATA TABLE PROVIDED
BY HDR
WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-23A.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/11/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 55

WELL ID: BC-23A Redevelopment
Recommended?
☒ Yes (as instructed) ☐ No
Inspection Photos

Measured DTW: 78.58 FT
Measured TD: 101.42 FT
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD – ROUND (NOT SQUARE)

Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- GRASS AROUND WELL IS MOWED
- STICK UP IS 2’
- SOFT TAG ON BOTTOM
- SEDIMENT BUILT UP ON TOP OF DEDICATED PUMP (CLEANED BEFORE REINSTALLATION)
- AN EXTREMELY HIGH SEDIMENT LOAD OBSERVED DURING RE-DEVELOPMENT
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- SCREEN 76.21’ – 101.21’; APPROX. 2’ OF OPEN SCREEN ABOVE WATER TABLE
- NO BOLLARDS, LOCK OK, TAG OK
- INTERIOR SECTION OF DEDICATED TUBING APPEARS YELLOW/GREEN (SLIGHTLY NEON);
SIMILAR TO COLOR OBSERVED IN BC-20
- SEE DEVELOPMENT LOG FOR FURTHER DETAILS

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\03. FGD Landfill additional assessment\Field Work\inspection forms\BC-25.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/09/2016
Field Personnel: BDW, WJW Weather:
☐ Sunny
☒ Overcast
☐ Rain
Approx. Temp: 75

WELL ID: BC-25 Redevelopment
Recommended?
☒ Yes (as instructed) ☐ No
Inspection Photos

Measured DTW: 17.59 FT
Measured TD: 25.73 FT
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
SLIGHTLY UNDERCUT ON
OPPOSITE SIDE OF ROAD

Condition of PVC casing/riser
and cap (water tightness)?
GOOD, DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- TAGGED HARD BOTTOM
- GRASS MOWED AROUND AREA
- WELL CONSTRUCTION TABLE INCORRECT – TOTAL DEPTH
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- BOLLARDS IN PLACE, LOCK GOOD, TAG OK
- SCREENED 8.15’ - 23.15’; APPROX. 10’ OF OPEN SCREEN ABOVE WATER TABLE
- SEE DEVELOPMENT LOG FOR FURTHER DETAILS

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-26.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 70

WELL ID: BC-26 Redevelopment
Recommended?
☐ Yes ☒ No
Inspection Photo

Measured DTW: 17.58’
Measured TD: 23.26’
Condition of Protective
Casing:
LATCH ON LID NEARLY BROKEN,
NEEDS REPLACED. OTHER
CASING INTACT.
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD – SLIGHTLY COVERED W/
DEBRIS UPON ARRIVAL

Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- BRUSHED DEBRIS OFF WELL PAD, PAD IN GOOD CONDITION
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- SCREENED 8.26’ -23.26’; APPROX. 10’ OF SCREEN ABOVE WATER TABLE
- NO BOLLARDS, LOCK OK, TAG OK
- CUT SMALL PIECE OF TUBING OFF PUMP CAP IN ORDER TO INSTALL NEOPRENE SLIP CAP
- DID NOT REMOVE DEDICATED PUMP, NO TURBIDITY ISSUES INDICATED IN DATA TABLE
PROVIDED BY HDR

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-27.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 65

WELL ID: BC-27 Redevelopment
Recommended?
☐ Yes ☒ No
Inspection Photos

Measured DTW: Below Pump
Measured TD: 34.95
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD
Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- VERY CLOSE TO ACTIVE PAVED HAUL ROAD
- NO DEBRIS/SEDIMENT BUILT UP AROUND WELL
- GRASS MOWED AROUND WELL
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- BOLLARDS IN PLACE, LOCK IS GOOD, WELL TAG OK
- INSTALLED NEOPRENE SLIP CAP
- DID NOT PULL DEDICATED PUMP, NO TURBIDITY ISSUES INDICATED IN DATA TABLE PROVIDED
BY HDR
- SCREENED 19.95’ – 34.95’.

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-28.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 65

WELL ID: BC-28 Redevelopment
Recommended?
☐ Yes ☒ No
Inspection Photos

Measured DTW: 49.16’
Measured TD: 60.20’
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD – PREVIOUSLY REPAIRED

Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- GRASS IS MOWED AROUND WELL
- STICK UP IS 2’ ABOVE GROUND

Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- SCREENED 45.20’ - 60.20’; APPROX. 4’ OF OPEN SCREEN ABOVE WATER TABLE
- NO BOLLARDS, LOCK OK, TAG OK
- LID OF PROTECTIVE CASING NOT ATTACHED, HINGE IS EXTREMELY RUSTED
- RECOMMEND REPLACEMENT OF PROTECTIVE CASING OR PROTECTIVE CASING LID
- DID NOT PULL DEDICATED PUMP, NO TURBIDITY ISSUES INDICATED IN DATA TABLE PROVIDED
BY HDR

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\03. FGD Landfill additional assessment\Field Work\inspection forms\BC-29.docx\BC-29.docx
Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 65

WELL ID: BC-29 Redevelopment
Recommended?
☐ Yes ☒ No
Inspection Photos

Measured DTW: BELOW PUMP
Measured TD: 22.30
Condition of Protective
Casing:
GOOD; ROUND (NOT SQUARE)
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD (CIRCULAR)
Condition of PVC casing/riser
and cap (water tightness)?
GOOD, DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- ABOUT 4.5’ - 5’ OF STICK UP AND PROTECTIVE CASING.
- NOT MOWED ON UPGRADIENT SIDE OF WELL HEAD (NO IMPACTS EXPECTED).
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- SCREENED 7.30’ – 22.30’; MAJORITY OF SCREEN ABOVE WATER TABLE
- NO BOLLARDS, LOCK OK, TAG OK
- INSTALLED NEOPRENE SLIP CAP (CUT TUBING ~1/4'’ IN ORDER TO INSTALL SECURELY OVER
PUMP CAP)
- DID NOT PULL DEDICATED PUMP, NO TURBIDITY ISSUES INDICATED IN DATA TABLE PROVIDED
BY HDR

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\03. FGD Landfill additional assessment\Field Work\inspection forms\BC-30.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/11/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 65

WELL ID: BC-30 Redevelopment
Recommended?
☒ Yes (as instructed) ☐ No
Inspection Photo

Measured DTW: 27.97 FT
Measured TD: 34.35 FT
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD
Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- VEGETATION IS MOWED AROUND WELL
- YELLOW/GREENISH FILM ON INTERIOR OF DEDICATED TUBING IN WELL, THROUGHOUT ENTIRE
LENGTH
- SLIGHTLY SOFT TAG ON BOTTOM
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- NO BOLLARDS, LOCK OK, TAG OK
- SCREENED 19.10’ – 34.10’; APPROX. 9’ OF WELL SCREEN ABOVE WATER TABLE
- CUT ~¼” OF TUBING OUT OF DEDICATED PUMP CAP IN ORDER TO INSTALL NEOPRENE SLIP CAP
- SEE DEVELOPMENT LOG FOR FURTHER DETAILS

WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-31.docx Page 1

Plant: BELEWS CREEK

Address: 3195 PINE HALL RD
BELEWS CREEK, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/10/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 65

WELL ID: BC-31 Redevelopment
Recommended?
☐ Yes ☒ No
Inspection Photos

Measured DTW: 58.73’
Measured TD: 83.30’
Condition of Protective
Casing:
RUSTED, BUT GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD
Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- AREA AROUND WELL MOWED NICELY
- REMOVED MINOR DEBRIS FROM WELL PAD
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- SCREENED 63.30’ – 83.30’
- NO BOLLARDS, TAG OK, LOCK OK
- CUT TUBING STICK UP (~1/4”) FROM DEDICATED PUMP CAP IN ORDER TO INSTALL NEOPRENE
SLIP CAP
- DID NOT PULL DEDICATED PUMP, NO TURBIDITY ISSUES INDICATED IN DATA TABLE PROVIDED
BY HDR
WELL INSPECTION FORM

P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\inspection forms\BC-32.docx Page 1

Plant: BELEWS CREEK

Address: 3195 Pine Hall Rd
Belews Creek, NC 27009
County: FORSYTH State: NC

Today’s Date:
11/09/2016
Field Personnel: BDW, WJW Weather:
☒ Sunny
☐ Overcast
☐ Rain
Approx. Temp: 70

WELL ID: BC-32 Redevelopment
Recommended?
☒ Yes (as instructed) ☐ No
Inspection Photo

Measured DTW: 17.96
Measured TD: 33.02
Condition of Protective
Casing:
GOOD
Bolts in place w/ gaskets?
☐ Yes ☐ No ☒ Stick Up
Condition of Concrete Pad?
GOOD
Condition of PVC casing/riser
and cap (water tightness)?
GOOD – DEDICATED PUMP CAP
(NO SEAL).
Pictures Taken? ☒ Yes ☐ No

General Observations (vegetation, hardness of well bottom, etc):
- GRASS MOWED AROUND PAD
- HARD BOTTOM TAG
Other comments (bollards, locks, well tag, miscellaneous debris, sediment buildup):
- BOLLARDS IN PLACE, LOCK IS GOOD, TAG OK
- WATER FROM DEVELOPMENT APPEARS TURBID POSSIBLY DUE TO FORMATION INFLUENCE IN
THE SCREENED INTERVAL.
- SCREENED 18.01’ – 33.01’
- INSTALLED NEOPRENE SEAL CAP
- SEE WELL DEVELOPMENT LOG FOR FURTHER DETAILS

MONITORING WELL DEVELOPMENT DUKE ENERGY CAROLINAS, LLC
BELEWS CREEK STEAM STATION
WELL DEVELOPMENT LOG
P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\Development Logs\BC-20.docx

FIELD PERSONNEL: BDW, WJW
WEATHER: SUNNY OVERCAST RAIN TEMPERATURE (APPROX): 60
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone]  [phone] Fax
www.synTerracorp.com
NOTES: WATER LEVEL HAS SIGNFICANTLY DROPPED
OVER TIME COMPARED TO HISTORICAL TABLE

WELL ID: BC-20 START DEVELPOMENT TIME/DATE: 11-10-16/ 0830
MEASURING POINT: TOC END DEVELOPMENT TIME/DATE: 11-10-16/ 1635
WELL DIAMETER: 2 IN TOTAL VOL PURGED: 16.0 GAL
WELL DEPTH: 24.49 (FT) WELL VOLUME: 1.02 GAL
DEPTH TO WATER: 18.21 (FT)

DEVELOPMENT METHOD: Grundfos Pump 12 Volt Pump Polyethylene Bailer

TIME VOL
TEMPERATURE DO CONDUCTANCE pH ORP* TURBIDITY*
NOTES
( Celsius) (mg/L) (S/cm) (su) (mV) (NTU)
835 3 18 7.5 688 5.4 204 O.O.R. BROWN-FULL OF
SEDIMENT; SURGED
940 5 18 8.54 712 5.4 240 O.O.R. BROWN-SEDIMENT
943 6 18 7.50 726 5.4 241 O.O.R. BROWN
SWITCHED TO BAILER – SURGING – TAGGING HARD BOTTOM
955 7.5 SEDIMENT APPEARS TO BE ENTERING THROUGH SCREEN - BROWN
1342 10.5 19 7.36 949 5.4 147 299 CLOUDY W/ FINES
CLOUDY WATER W/ FINES IN TOP HALF OF BAILER, SEDIMENT IN BOTTOM HALF OF BAILER – SEE PHOTO ON INSPECTION FORM
1610 13.0 19 6.26 965 5.4 187 499
STILL FEELS LIKE SEDIMENT BUILD-UP IN BOTTOM (SOFT)
CONTINUED SURGING & BAILING
BAILING SEEMS INEFFECTIVE, SEDIMENT CONTINUES TO INFILTRATE THE SCREEN
1635 16.0

COMMENTS: FIELD VEHICLE ACCESSIBLE YES NO

Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) YES NO. If NO, which
parameter ____________. NOTE that reported data should be considered as flagged accordingly.
* SynTerra is not NC-certified for these parameters. Data collected for information purposes only. O.O.R. = OUT OF RANGE.

WELL TAG PROTECTIVE CASING LOCK CAP CONCRETE PAD
GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE

MONITORING WELL DEVELOPMENT DUKE ENERGY CAROLINAS, LLC
BELEWS CREEK STEAM STATION
WELL DEVELOPMENT LOG
P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\Development Logs\BC-21.docx

FIELD PERSONNEL: BDW, WJW
WEATHER: SUNNY OVERCAST RAIN TEMPERATURE (APPROX):
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone]  [phone] Fax
www.synTerracorp.com
NOTES:

WELL ID: BC-21 START DEVELPOMENT TIME/DATE: 11-10-16/ 1013
MEASURING POINT: TOC END DEVELOPMENT TIME/DATE: 11-10-16/ 1600
WELL DIAMETER: 2 IN TOTAL VOL PURGED: 11.0 GAL
WELL DEPTH: 16.99 (FT) WELL VOLUME: 0.60 GAL
DEPTH TO WATER: 13.36 (FT)

DEVELOPMENT METHOD: Grundfos Pump 12 Volt Pump Polyethylene Bailer

TIME VOL
TEMPERATURE DO CONDUCTANCE pH ORP* TURBIDITY*
NOTES
( Celsius) (mg/L) (S/cm) (su) (mV) (NTU)
1016 3 O.O.R. BROWN – SEDIMENT RICH
1045 5 O.O.R. BROWN
1205 6.5 20 6.33 747 5.3 193 94
CLOUDY FROM TOP OF
BAILER (SEDIMENT IN
BOTTOM)
1322 8.0 19 5.68 739 5.5 156 81.9
CLOUDY – CLEARER AT
TOP OF BAILER
(SEDIMENT AT BOTTOM)
1550 9 19 5.90 730 5.2 171 30.4 CLEAR W/ FINES
TOP OF BAILER CLEAN, MINOR SEDIMENT AT BOTTOM - SEE PHOTO ON INSPECTION LOG
1600 11.0

COMMENTS: FIELD VEHICLE ACCESSIBLE YES NO

Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) YES NO. If NO, which
parameter ____________. NOTE that reported data should be considered as flagged accordingly.
* SynTerra is not NC-certified for these parameters. Data collected for information purposes only. O.O.R. = OUT OF RANGE.

WELL TAG PROTECTIVE CASING LOCK CAP CONCRETE PAD
GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE

MONITORING WELL DEVELOPMENT DUKE ENERGY CAROLINAS, LLC
BELEWS CREEK STEAM STATION
WELL DEVELOPMENT LOG
P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\Development Logs\BC23A-.docx

FIELD PERSONNEL: BDW, WJW
WEATHER: SUNNY OVERCAST RAIN TEMPERATURE (APPROX): 55
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone]  [phone] Fax
www.synTerracorp.com
NOTES: SEDIMENT ON TOP OF DEDICATED PUMP
SOFT TAG AT WELL BOTTOM

WELL ID: BC-23A START DEVELPOMENT TIME/DATE: 11-11-16/ 0826
MEASURING POINT: TOC END DEVELOPMENT TIME/DATE: 11-11-16/ 1300
WELL DIAMETER: 2 IN TOTAL VOL PURGED: 39 GAL
WELL DEPTH: 101.42 (FT) WELL VOLUME: 3.7 GAL
DEPTH TO WATER: 78.58 (FT)

DEVELOPMENT METHOD: Grundfos Pump 12 Volt Pump Polyethylene Bailer

TIME VOL
TEMPERATURE DO CONDUCTANCE pH ORP* TURBIDITY*
NOTES
( Celsius) (mg/L) (S/cm) (su) (mV) (NTU)
0830 2.5
COARSE BLACK PARTICULATES AT START OF FLOW. FLOW SEEMS REDUCED DUE TO SEDIMENT LOAD.
BROWNISH-GRAY WATER- EXTREMELY THICK WITH SEDIMENT. FEELS LIKE LARGE ACCUMUALATION OF
SEDIMENT IN BOTTOM OF WELL.
0851 6 16 6.68 115 6.1 12.9 O.O.R. TAN – W/ SEDIMENT
0900 8.5 BROWN - FULL OF SEDIMENT
0923 10.0 16 5.31 74 6.1 -3.3 O.O.R. BROWN – W/ HEAVY
SEDIMENT
0934 14.0 16 7.31 53 5.9 42 O.O.R. LT. BROWN W/
SEDIMENT
1046 18.5 16 7.05 48 5.9 102 748 LT TAN W/ FINES
1104 22.0 18 6.50 47 5.9 75 O.O.R. LT TAN W/ FINES
1109 24.0 LT TAN W/ FINES
1202 29.0 19 8.28 135 5.8 79 O.O.R. LT TAN W/ FINES
1215 31.0 19 7.71 49 5.8 77
SWITCHED TO BAILER
1240 36 16 8.17 48 5.8 99 O.O.R. BROWN
1300 39 16 7.94 49 5.8 84 O.O.R. BROWN
SEDIMENT APPEARS TO BE ENTERING THROUGH THE FORMATION, HARD TAG WITH BAILER AT WELL BOTTOM

COMMENTS: FIELD VEHICLE ACCESSIBLE YES NO

Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) YES NO. If NO, which
parameter ____________. NOTE that reported data should be considered as flagged accordingly.
* SynTerra is not NC-certified for these parameters. Data collected for information purposes only. O.O.R. = OUT OF RANGE.

WELL TAG PROTECTIVE CASING LOCK CAP CONCRETE PAD
GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE

MONITORING WELL DEVELOPMENT DUKE ENERGY CAROLINAS, LLC
BELEWS CREEK STEAM STATION
WELL DEVELOPMENT LOG
P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\Development Logs\BC-25.docx

FIELD PERSONNEL: BDW, WJW
WEATHER: SUNNY OVERCAST RAIN TEMPERATURE (APPROX): 75
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone]  [phone] Fax
www.synTerracorp.com
NOTES: UPPER 10’ OF SCREEN IS DRY
TOTAL DEPTH IN CONSTRUCTION TABLE INCORRECT

WELL ID: BC-25 START DEVELPOMENT TIME/DATE: 11-9-16/ 1515
MEASURING POINT: TOC END DEVELOPMENT TIME/DATE: 11-9-16/ 1646
WELL DIAMETER: 2 IN TOTAL VOL PURGED: 27 GAL
WELL DEPTH: 25.73 (FT) WELL VOLUME: 2.16 GAL
DEPTH TO WATER: 17.59 (FT)

DEVELOPMENT METHOD: Grundfos Pump 12 Volt Pump Polyethylene Bailer

TIME VOL
TEMPERATURE DO CONDUCTANCE pH ORP* TURBIDITY*
NOTES
( Celsius) (mg/L) (S/cm) (su) (mV) (NTU)
1515 2.5 20 2.95 1533 5.2 182 O.O.R. BROWN
1519 5 19 3.25 1467 5.3 187 O.O.R. BROWN
1522 7.5 19 4.26 1162 5.3 193 O.O.R. BROWN – DRY PUMP OFF
1534 10 19 3.67 1317 5.3 189 126 CLOUDY W/FINES
1559 15 19 4.71 1174 5.3 188 O.O.R. SURGED
1602 17 DRY – PUMP OFF
1622 20 19 4.82 1248 5.3 191 66.7 CLOUDY W/ FINES
1625 22 19 5.55 1309 5.3 198 337 LT BROWN W/ SEDIMENT
1643 25 19 4.95 1429 5.3 214 26.6
TURBIDITY TAKEN AFTER
TURNING PUMP ON,
RISING QUICKLY
1645 27 19 5.70 1381 5.3 216 382 LT BROWN W/ FINES

COMMENTS: FIELD VEHICLE ACCESSIBLE YES NO

Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) YES NO. If NO, which
parameter ____________. NOTE that reported data should be considered as flagged accordingly.
* SynTerra is not NC-certified for these parameters. Data collected for information purposes only. O.O.R. = OUT OF RANGE.

WELL TAG PROTECTIVE CASING LOCK CAP CONCRETE PAD
GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE

MONITORING WELL DEVELOPMENT DUKE ENERGY CAROLINAS, LLC
BELEWS CREEK STEAM STATION
WELL DEVELOPMENT LOG
P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\Development Logs\BC-30.docx

FIELD PERSONNEL: BDW, WJW
WEATHER: SUNNY OVERCAST RAIN TEMPERATURE (APPROX):
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone]  [phone] Fax
www.synTerracorp.com
NOTES: SOMEWHAT SOFT TAG INITIALLY
HARD TAG AFTER 10 GALLONS

WELL ID: BC-30 START DEVELPOMENT TIME/DATE: 11-11-16/ 0951
MEASURING POINT: TOC END DEVELOPMENT TIME/DATE: 11-11-16/ 1025
WELL DIAMETER: 2 IN TOTAL VOL PURGED: 10 GAL
WELL DEPTH: 34.35 (FT) WELL VOLUME: 1.0 GAL
DEPTH TO WATER: 27.97 (FT)

DEVELOPMENT METHOD: Grundfos Pump 12 Volt Pump Polyethylene Bailer

TIME VOL
TEMPERATURE DO CONDUCTANCE pH ORP* TURBIDITY*
NOTES
( Celsius) (mg/L) (S/cm) (su) (mV) (NTU)
1001 3.0 15 7.58 74 5.8 116 O.O.R. BROWN - SEDIMENT
LOTS OF SEDIMENT, BLACK MATERIAL COMING OUT OF WELL IN BAILER. HARD TAG ON BOTTOM AFTER 5 GALLONS
1004 5 14 7.58 68.6 5.8 145 O.O.R. BROWN SEDIMENT
1019 9 14 7.55 66.8 5.8 169 O.O.R. BROWN SEDIMENT
1024 10 14 7.57 65.4 5.8 185 O.O.R. BROWN SEDIMENT
HARD TAG W/ WATER LEVEL AT 10 GALLONS PURGED – SEDIMENT COMING IN FROM FORMATION

COMMENTS: FIELD VEHICLE ACCESSIBLE YES NO

Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) YES NO. If NO, which
parameter ____________. NOTE that reported data should be considered as flagged accordingly.
* SynTerra is not NC-certified for these parameters. Data collected for information purposes only. O.O.R. = OUT OF RANGE.

WELL TAG PROTECTIVE CASING LOCK CAP CONCRETE PAD
GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE

MONITORING WELL DEVELOPMENT DUKE ENERGY CAROLINAS, LLC
BELEWS CREEK STEAM STATION
WELL DEVELOPMENT LOG
P:\Duke Energy Progress.1026\20. BELEWS CREEK\.03 FGD Landfill additional assessment\Field Work\Development Logs\BC-32.docx

FIELD PERSONNEL: BDW, WJW
WEATHER: SUNNY OVERCAST RAIN TEMPERATURE (APPROX): 70
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone]  [phone] Fax
www.synTerracorp.com
NOTES: SURFACE COMPLETION AND PUMP IN
EXCELLENT CONDITION

WELL ID: BC-32 START DEVELPOMENT TIME/DATE: 11-9-16/ 0949
MEASURING POINT: TOC END DEVELOPMENT TIME/DATE: 11-9-16/ 1440
WELL DIAMETER: 2 IN TOTAL VOL PURGED: 35 GAL
WELL DEPTH: 33.02 (FT) WELL VOLUME: 3.33 GAL
DEPTH TO WATER: 17.96 (FT)

DEVELOPMENT METHOD: Grundfos Pump 12 Volt Pump Polyethylene Bailer

TIME VOL
TEMPERATURE DO CONDUCTANCE pH ORP* TURBIDITY*
NOTES
( Celsius) (mg/L) (S/cm) (su) (mV) (NTU)
0952 5 18 5.07 1300 5.4 212 O.O.R. SURGED – LT BROWN
SEDIMENT
0955 10 17 4.05 1460 5.4 220 O.O.R. LT BROWN – SEDIMENT
0958 12.5 17 7.20 1344 5.5 216 O.O.R. INTERMITTENT FLOW –
PUMP OFF
ALLOWED WELL TO RECHARGE
1207 15 18 8.22 1348 5.5 187 373 MILKY GREY
1210 20 17 8.61 1337 5.6 199 O.O.R. SURGED – TAN SEDIMENT
1213 23 17 5.71 1495 5.4 202 O.O.R. LT BROWN SEDIMENT
1430 25 17 8.24 1347 5.5 142 219 CLOUDY W/ FINES
1434 27.5 17 8.42 1328 5.5 157 347 MILKY
1437 30 17 8.42 1278 5.5 168 402 MILKY
1439 35 17 9.12 1377 5.5 172 O.O.R.
TURBIDITY INCREASES AS WATER DRAWS DOWN TO BOTTOM OF SCREEN – ENTERING FROM FORMATION

COMMENTS: FIELD VEHICLE ACCESSIBLE YES NO

Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) YES NO. If NO, which
parameter ____________. NOTE that reported data should be considered as flagged accordingly.
* SynTerra is not NC-certified for these parameters. Data collected for information purposes only. O.O.R. = OUT OF RANGE.

WELL TAG PROTECTIVE CASING LOCK CAP CONCRETE PAD
GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE GOOD BAD NONE