CCB0003_DukeRoxboro_GWAssessmentWorkplan_DIN27063_20161120

Belews Creek Steam Station 3195 Pine Hall Road Belews Creek, NC 27009
336-215-4576

www.duke-energy.com Page 1 of 1
November 20, 2016

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 (submitted electronically)
Re: Groundwater Assessment Work Plan
Gypsum Storage Area .1700 Structural Fill
Permit No.: CCB003
Roxboro Steam Electric Plant
Semora, North Carolina 27343
Dear Ms. Werner,

Attached you will find the Groundwater Assessment Work Plan for the Gypsum Storage Area
.1700 Structural Fill located at the Duke Energy Progress (Duke) Roxboro Steam Electric Plant. This plan is being submitted to the Division for approval.

Duke 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 working with you regarding environmental concerns.
If there are any questions regarding this request, please contact me at [phone] of by email
at [e-mail].

Respectfully submitted,

Kimberlee Witt, PE Environmental Services

Attachments: Groundwater Assessment Work Plan for Roxboro Steam Electric Plant November
2016
cc (via e-mail): Ed Mussler, NCDEQ
Evan Andrews, Duke Energy
Robert Howard, Duke Energy
Rob Miller, Duke Energy
Ed Sullivan, Duke Energy
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TABLE OF CONTENTS
SECTION PAGE
Executive Summary .............................................................................................................. ES-1
1.0 Introduction .................................................................................................................. 1-1
1.1 Background .............................................................................................................. 1-1
1.2 Objective ................................................................................................................... 1-1
2.0 Site Information ........................................................................................................... 2-1
2.1 Site Description ....................................................................................................... 2-1
2.2 Site Geology and Hydrogeology .......................................................................... 2-1
2.3 Regulatory Requirements ...................................................................................... 2-2
2.4 Assessment Activities ............................................................................................. 2-2
3.0 Assessment Work Plan................................................................................................ 3-1
3.1 Monitoring Well Installation ................................................................................. 3-1
3.2 Groundwater Samples ............................................................................................ 3-2
3.3 Field and Sampling Quality Assurance/Quality Control Procedures ............. 3-3
Field Logbooks .................................................................................................. 3-3 3.3.1
Field Data Records ............................................................................................ 3-3 3.3.2
Field Equipment Calibration ........................................................................... 3-4 3.3.3
Sample Custody Requirements ....................................................................... 3-5 3.3.4
Quality Assurance and Quality Control Samples ........................................ 3-7 3.3.5
Decontamination Procedures .......................................................................... 3-8 3.3.6
4.0 Report and Schedule ................................................................................................... 4-1
5.0 References ...................................................................................................................... 5-1

LIST OF FIGURES

Figure 1 Site Location Map
Figure 2 Site Layout Map
Figure 3 Proposed Well Location Map
Figure 4 Typical Well Construction Schematics

LIST OF TABLES

Table 1 Groundwater Sample Parameters and Analytical Methods
Table 2 Proposed Schedule For Gypsum Storage Area Assessment

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LIST OF APPENDICES

Appendix A MW-3BR and MW-22D/BR/BRL Assessment Information Summary
Appendix B Low Flow Sampling Plan Duke Energy Facilities Ash Basin Groundwater
Assessment Program

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ACRONYMS

BGS Below Ground Surface
CAMA Coal Ash Management Act
CAP Corrective Action Plan
CCR Coal Combustion Residuals
CSA Comprehensive Site Assessment
DEP Duke Energy Progress, LLC
DFA Dry Fly Ash
DO Dissolved Oxygen
DWM Division of Waste Management
DWR Division of Water Resources
EAB East Ash Basin
EEI Eastern Extension Impoundment
FDR Field Data Record
FGD Flue Gas Desulfurization
IMAC Interim Maximum Allowable Concentrations
MSL Mean Sea Level
NCDENR North Carolina Department of Environment and Natural Resources
NCDEQ North Carolina Department of Environmental Quality
NPDES National Pollutant Discharge Elimination System
ORP Oxidation-Reduction Potential
PLM Polarized Light Microscopy
QA/QC Quality Assurance/Quality Control
SCM Site Conceptual Model
SEI Southern Extension Impoundment
TDS Total Dissolved Solids
TSS Total Suspended Solids
WAB West Ash Basin
USGS United States Geological Survey

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EXECUTIVE SUMMARY
Duke Energy Progress, LLC (Duke Energy, DEP) owns and operates the Roxboro Steam
Electric Plant (the Roxboro Plant, Plant or Site) located at 1700 Dunnaway Road in
Semora, Person County, North Carolina. Roxboro Plant began operations in 1966 as a
coal-fired electrical generating station with additional generating units added in 1968,
1973, and 1980, with a combined electric generating capacity of 2,422 megawatts. Coal
combustion residuals (CCRs) have historically been managed at the Plant’s two on-site
ash basins: the semi-active East Ash Basin (EAB), which began operations from the mid-
1960s to present, and the active West Ash Basin (WAB), which started operations from
the early 1970s to present. CCRs were initially deposited in the EAB by hydraulic
sluicing operations until the Plant was modified for dry fly ash (DFA) handling in the
1980s. An unlined landfill was constructed on top of the East Ash Basin for the
placement of the DFA. A lined ash landfill was constructed in phases over the unlined
landfill beginning in 2004. Most of the fly ash material produced at the facility is
currently collected by dry handling operations and are disposed within the lined ash
landfill of the EAB or transported offsite for beneficial reuse. The WAB was constructed
in 1973 and received bottom ash by hydraulic sluicing methods through present day.
A Flue Gas Desulfurization (FGD) system is present within the WAB footprint. The
FGD system directs flue gas into an absorber where limestone (calcium carbonate)
slurry is sprayed. Sulfur dioxide in the flue gas reacts with the limestone slurry to
produce calcium sulfate or gypsum. Gypsum produced at the Roxboro Plant is mostly
used for wallboard production at an adjacent building materials facility. Gypsum is
staged in an area referred to as the Gypsum Storage Area. The construction of the
gypsum storage area in 2007 incorporated approximately 131,319 cubic yards of DFA as
structural fill approved by the NCDENR (current NCDEQ) Division of Waste
Management (DWM) under Facility ID#CCB 003 in accordance with Section .1700 of the
Solid Waste Management 15A NCAC 13B Rules. Notification for construction using
coal ash as structural fill was accepted in a letter, dated December 16, 2005, from
NCDENR DWM to Progress Energy Service Company, LLC. Notification of
construction completion was submitted to NCDENR DWM on March 27, 2007 with
deed recordation provided on November 27, 2007.
Additional assessment is proposed to evaluate potential source impacts from the
gypsum storage area.

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This Work Plan includes the following:
Descriptions of the Roxboro Plant, the coal ash basins, and the gypsum storage
area;
NPDES permit NC0003425 and a summary of regulatory requirements under the
NPDES program;
A description of the regional geology and hydrology; and,
Proposed assessment activities including monitoring well installation and
groundwater sampling from proposed and existing monitoring wells at strategic
locations associated with the gypsum storage area.
The information obtained through this Work Plan will be used to prepare a report that
presents field observations, analytical data, and conclusions regarding the assessment
findings. The report will be submitted to NCDEQ DWM within approximately 60 days
following receipt and validation of all analytical data.

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1.0 INTRODUCTION
1.1 Background
Duke Energy Progress, LLC. (DEP) owns and operates the Roxboro Steam Electric Plant
(Roxboro Plant, Plant or Site), situated on approximately 6,095 acres, addressed at 1700
Dunnaway Road in Semora, Person County, North Carolina. A Site Location Map is
included as Figure 1. The Roxboro Plant began operations in the 1960s and continued
to add capacity through the 1980s. Currently, the Plant operates four coal-fired units.
Coal combustion residuals (CCRs) have historically been managed at the Plant’s on-site
ash basins: the semi-active East Ash Basin (EAB) (operated from the mid-1960s to
present) and the active West Ash Basin (WAB) (operated from the early 1970s to
present). An unlined landfill was constructed on top of the semi-active East Ash Basin
in the late 1980s for the placement of dry fly ash (DFA). A lined landfill was
constructed over the unlined landfill around 2004 (Figure 2).
A Flue Gas Desulfurization (FGD) system is present within the WAB footprint. The
FGD system directs flue gas into an absorber where limestone (calcium carbonate)
slurry is sprayed. Sulfur dioxide in the flue gas reacts with the limestone slurry to
produce calcium sulfate or gypsum. Gypsum produced at the Roxboro Plant is mostly
used for wallboard production at an adjacent building materials facility. Gypsum is
staged in an area referred to as the Gypsum Storage Area, which is located adjacent to
and on the north side of the East Ash Basin. The construction of the gypsum storage
area in 2007 incorporated approximately 131,319 cubic yards of DFA as structural fill
approved by the NCDENR (current NCDEQ) Division of Waste Management (DWM)
under Facility ID#CCB 003 in accordance with Section .1700 of the Solid Waste
Management 15A NCAC 13B Rules. Notification for construction using coal ash as
structural fill was accepted in a letter, dated December 16, 2005, from NCDENR DWM
to Progress Energy Service Company, LLC. Notification of construction completion
was submitted to NCDENR DWM on March 27, 2007 with deed recordation provided
on November 27, 2007.
1.2 Objective
DEP continues to evaluate Roxboro Plant’s ash basins and other point sources to meet
the requirements of the Coal Ash Management Act (CAMA) of 2014 and address the
final risk determination for the Site. The objective of this Work Plan is to assess
groundwater conditions in relation to the gypsum storage area. This work is under the
jurisdiction of DWM with acknowledgement that this assessment will supplement and
expand on the information gained from the Comprehensive Site Assessment (CSA)
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conducted by SynTerra in 2015 and subsequent assessments conducted by SynTerra in
2016.
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2.0 SITE INFORMATION
2.1 Site Description
The Roxboro Plant is located approximately 10 miles northwest of the City of Roxboro,
North Carolina. The Plant is located on approximately 6,095 acres between McGhees
Mill Road to the east and Hyco Reservoir, a lake formed from the impoundment of the
Hyco River, to the west. The Site is developed with the power plant structures, ash
management areas and associated canals. The power plant structures are located
primarily on the north side of the Site near the Hyco Reservoir and the ash management
areas are located generally south of the power plant buildings. Land beyond the ash
management areas to the east, south and west are wooded and transected by
transmission lines. The Hyco Reservoir borders the Site to the west and north.
2.2 Site Geology and Hydrogeology
The Roxboro Plant is situated in the eastern Piedmont Region of north-central North
Carolina. The Piedmont is characterized by well-rounded hills and rolling ridges cut by
small streams and drainages. Elevations in the area of the Roxboro Plant range between
410 feet above mean sea level (msl) during full pool at Hyco Reservoir to 570 feet msl
near the Dunnaway Road and McGhees Mill Road intersection southeast of the Plant.
Geologically, the Plant is located near the contact of two regional geologic zones: the
Inner Piedmont zone and the Carolina zone. Both zones are generally comprised of
igneous and metamorphosed igneous and sedimentary rocks of Paleozoic age. In
general, the rocks are highly fractured and folded and have been subjected to long
periods of physical and chemical weathering. The origination, genesis, and
characteristics of the rocks of the region have been the focus of detailed study by
researchers for many years. These investigations have resulted in a number of
interpretations and periodic refinements to the overall geological model of the region.
The position, geometry, topography, and hydrogeologic character of the ash basins, the
former stream valleys to the Hyco River in which the basins were constructed, and
Hyco Reservoir are the primary influences on groundwater flow and constituent
transport at the Site. The former natural drainage features generally trend southeast to
northwest across the site. The ash basins are separated by a northwest-southeast
trending topographic ridge. Groundwater flow across the site is generally from upland
areas south and southeast (recharge areas) toward Hyco Reservoir which is situated to
the north/northwest. Localized areas of groundwater discharge to surface water occur
from the two ash basins and the topographic ridge separating the basins. Further
influences to groundwater flow include the earthen impoundments (dams and
separator dikes) creating the basins; the intake canal (north of the EAB); the discharge
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canals; and the heated water discharge pond. A generalized water level map for the
bedrock aquifer, including the saprolite and transition zone hydrogeologic units,
incorporating the June 14, 2016 CSA and the April 6-7, 2016 National Pollutant
Discharge Elimination System (NPDES) compliance measurements, is provided in the
CSA Supplement 1 (SynTerra, August 1, 2106).
2.3 Regulatory Requirements
The NPDES program regulates wastewater discharges to surface waters. The Site is
permitted to discharge wastewater under NPDES Permit NC0003425, which authorizes
discharge from the facility to Hyco Reservoir in accordance with effluent limitations,
monitoring requirements, and other conditions set forth in the permit. Surface water
monitoring has been conducted since the NPDES permits have been issued.
The permit authorizes discharges from the ash basin treatment system at Outfall #003
and the coal pile runoff treatment system at Outfall #006. These outfalls discharge to
the Hyco Reservoir. Several internal outfall discharges are also authorized via Outfall
#003 including: the ash basin treatment system (Internal Outfall #002), the cooling tower
blowdown system (Internal Outfall #005), coal pile runoff treatment system (Internal
Outfall #006); the domestic wastewater treatment system (Internal Outfall #008), the
chemical metal cleaning treatment system (Internal Outfall #009) and the flue gas
desulfurization treatment system (Internal Outfall #010).
Effluent discharges from the various waste streams enter the Hyco Reservoir through
Outfall #003. In accordance with the NPDES permit, effluent is monitored for total
residual chlorine (twice monthly); total phosphorus (monthly); total nitrogen (monthly),
temperature (continuous); total arsenic (monthly), pH (weekly) and acute toxicity
(quarterly).
2.4 Assessment Activities
As part of the 2015 CSA activities conducted under CAMA of 2014, multiple
groundwater monitoring wells were installed on the Site including MW-3BR, located at
the northeast corner of the gypsum storage area. MW-3BR is an upper bedrock
monitoring well with a screened interval from 57 to 67 feet below ground surface (bgs).
Competent bedrock was intercepted at 48 feet bgs. The monitoring well was sampled
three times in 2015 (May, September and December), January 2016 and September 2016.
In summary, several constituents were detected above NCDENR Title 15, Subchapter
2L. Groundwater Classifications and Standards (2L) or Interim Maximum Allowable
Concentrations (IMAC) including boron, cobalt, iron, manganese, sulfate, total
dissolved solids (TDS) and vanadium. Details regarding well installation, lithology,
groundwater sampling procedures and analytical results were provided to NCDEQ
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DWM in the CSA Report, dated September 2, 2015, and the CAP Part 2, dated February
29, 2016. The boring log/well construction diagram and a groundwater analytical
summary for MW-3BR are provided in Appendix A.

As part of continued assessment of the site, a well cluster, consisting of companion
wells MW-22D, MW-22BR and MW-22BRL, was installed at the southwest corner of the
gypsum storage area in the spring of 2016 to evaluate potential source impacts from ash
used as structural fill for the gypsum storage area and assess impacts downgradient
from the East Ash Basin. The actual location of the well cluster was limited by physical
constraints of the gypsum storage and overhead electrical transmission lines. The first
sampling event for the MW-22 cluster occurred on June 20, 2016 followed by a second
sampling event on July 27, 2016. A sample was not collected from MW-22BRL due to a
very slow recharge rate (weeks); therefore, the well was converted to a piezometer.
Analytical results of sampling for the MW-22 cluster indicated several constituents
detected above 2L or IMAC including cobalt, iron, manganese, selenium, sulfate, TDS
and vanadium. The wells were sampled again in September 2016, including MW-
22BRL. The analytical data indicated several constituents remain above 2L or IMAC
including cobalt (MW-22D/BR), iron (MW-22D/BR), manganese (MW-22D/BR),
selenium (MW-22D), sulfate (MW-22D/BR), TDS (all wells) and vanadium (all wells). In
addition, hexavalent chromium and boron were detected in MW-22BRL above IMAC
and 2L, respectively. Details regarding well installation, lithology, groundwater
sampling procedures and analytical results were provided to the NCDEQ DWM in a
CSA Supplement 1 report, dated August 1, 2016. The boring log/well construction
diagrams and a groundwater analytical summary for MW-22D/BR/BRL are provided in
Appendix A.
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3.0 ASSESSMENT WORK PLAN
The scope of work discussed in this plan is designed to meet the requirements of 15A
NCAC 02L .0106(g) as it pertains to the gypsum storage area.
3.1 Monitoring Well Installation
Three monitoring well clusters (three wells per cluster), GPMW-1 through GPMW-3,
are proposed at the northwest, central and southeast corners of the gypsum storage area
as shown on Figure 3. The proposed monitoring wells will be screened in the surficial
(S), transition zone (D), and upper bedrock (BR) flow zones (as saturated conditions are
observed) to assess groundwater quality and evaluate vertical migration of constituents.
Estimated depths from ground surface for each zone are 40 feet bgs for the surficial
well, 50 feet bgs for the transition zone well, and 80 feet bgs for the upper bedrock well.
The proposed monitoring wells will be installed following appropriate access and
permit approvals including NCDEQ Erosion & Sediment Control.
It is proposed the borings will be drilled utilizing air rotary (specifically, pneumatic air
hammer) techniques. It is anticipated that wells may be completed in the saprolite unit,
the transition zone between saprolite and competent bedrock, and bedrock wells
installed into the upper portion of the underlying shallow bedrock to an approximate
depth, based on specific conditions, of at least 10 feet below the saprolite/bedrock
transition zone. For locations with multiple monitoring wells (two or more monitoring
wells at the same location), the deeper well shall be installed first. Upon completion of
the deeper well, the drill rig will be offset according to the well arrangement and the
shallower well(s) to be installed. During boring installation, soil/rock cuttings will be
described for lithologic information including color and soil/ rock type.
Wells will be installed with screen intervals 10 feet in length. Depending on Site
conditions (e.g., the presence of saturated conditions in the saprolite and/or transition
zone), transition zone and bedrock wells may be installed as either single or double-
cased wells. For double-cased wells, an outer casing will be installed into the top of
competent bedrock to a depth that will be determined based on field observations
during drilling. A permanent 6-inch diameter schedule 40 PVC outer casing will be
installed and grouted in-place. After the grout has had sufficient time to set (minimum
24 hours), drilling will advance through the casing using a smaller diameter air hammer
bit into bedrock to the depth of the first water-bearing zone and at least 10 feet below
the depth of the surface casing.
Each well will be constructed in accordance with NCAC Title 15A, Subchapter 2C,
Section .0100 Well Construction Standards and consist of 2-inch diameter NSF schedule
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40 PVC flush-joint threaded casings and pre-packed screens appropriately sized based
on soil conditions identified during previous assessment activities. The annular space
between the borehole wall/inner casing and pre-packed well screens for each of the
wells will be filled with clean, well-rounded, washed high silica sand. The sand pack
will be placed to approximately 2 feet above the top of the pre-packed screen and then
an approximate 2-foot pelletized bentonite seal will be placed above the filter pack and
hydrated. The remainder of the annular space will be filled with a bentonite cement
grout from the top of the bentonite seal to near ground surface. Monitoring wells will
be completed with above-ground steel or aluminum protective casings with locking
caps and well tags. The protective covers will be secured and completed in a concrete
collar and a minimum two-foot square concrete pad with bollards. Typical well
construction schematics are included in Figure 4.
Following installation, the monitoring wells will be developed in order to remove drill
fluids, clay, silt, sand, and other fines, which may have been introduced into the
formation or sand pack during drilling and well installation, and to establish
communication of the well with the aquifer. Well development will be performed using
a portable submersible pump, which will be repeatedly moved up and down the well
screen interval until the water obtained is relatively clear. Development will be
continued for a minimum of 2 hours or until monitoring parameters (e.g., conductivity,
pH, temperature) are generally stabilized; estimated quantities of drilling fluids, if used,
are removed; and, turbidity decreases to acceptable levels (10 NTUs or less). The wells
may be developed as installed (but no sooner than 24 hours after installation).
Following well completion, the newly installed wells will be surveyed for location and
elevation.
3.2 Groundwater Samples
Groundwater samples will be collected using low flow sampling techniques utilizing
either a peristaltic pump or submersible pump per the groundwater sampling
procedures provided in the Low Flow Sampling Plan, Duke Energy Facilities, Ash Basin
Groundwater Assessment Program, North Carolina, June 10, 2015 (Appendix B) (Low Flow
Sampling Plan) to minimize sampling error and prevent cross contamination of samples.
Field parameters, as listed in Table 1, will be measured and recorded during
groundwater sampling. Groundwater samples will be submitted to the Duke Energy
analytical laboratory and analyzed for the constituents listed in Table 1. Groundwater
results will be compared to the 2L and IMAC values.
During groundwater sampling activities, water level measurements will be made at the
existing site monitoring wells, observation wells, and piezometers, along with the new
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wells. The data will be used to generate water table and potentiometric maps of the
upper and lower portions of the surficial aquifer zones.
3.3 Field and Sampling Quality Assurance/Quality Control
Procedures
Documentation of field activities will be completed using a combination of logbooks,
field data records (FDRs), sample tracking systems, and sample custody records as
detailed in the CSA Work Plan.
Field Logbooks 3.3.1
The field logbooks are permanently bound and provide a hand written account
of field activities. Entries are made in indelible ink, and corrections are made
with a single line with the author initials and date. Each page of the logbook is
dated and initialed by the person completing the log. Partially completed pages
will have a line drawn through the unused portion at the end of each day with
the author’s initials. The following information is generally entered into the field
logbooks:
The date and time of each entry;
A summary of important tasks or subtasks completed during the day;
A description of field tests completed in association with the daily task;
A description of samples collected including documentation of quality
control samples that were prepared (rinse blanks, duplicates, matrix
spike, split samples, etc.);
Documentation of equipment maintenance and calibration activities;
Documentation of equipment decontamination activities; and,
Descriptions of deviations from the work plan.
Field Data Records 3.3.2
Sample FDRs contain sample collection and/or exploration details. A FDR may
be a preprinted fill-in the blanks form on paper or it may be an electronically
generated form where data and information is recorded and stored directly onto
an I-pad or similar. A FDR is completed each time a field sample is collected.
The goal of the FDR is to document exploration and sample collection methods,
materials, dates and times, and sample locations and identifiers. Field
measurements and observations associated with a given exploration or sample
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collection task are recorded on the FDRs. FDRs are maintained throughout the
field program in files that become a permanent record of field program activities.
Field Equipment Calibration 3.3.3
Field sampling equipment (e.g., YSI pH/conductivity/temperature/dissolved
oxygen/oxidation-reduction potential [ORP] meter) will be properly maintained
and calibrated prior to and during continued use to confirm that measurements
are accurate within the limitations of the equipment. Personnel will follow the
manufacturers’ instructions to determine if the instruments are functioning
within their established operation ranges. To be acceptable, a field test must be
bracketed between acceptable calibration results. The calibration data will be
recorded on a FDR.
The first check may be an initial calibration, but the second check must
be a continuing verification check.
The field parameter meter must undergo morning, afternoon and end of
day calibrations, as applicable.
Verify the calibration at no more than 24-hour intervals during use and
at the end of the use if the instrument will not be used the next day or
time periods greater than 24 hours.
Initial calibration and verification checks must meet the acceptance
criteria.
If an initial calibration or verification check fails to meet the acceptance
criteria, immediately recalibrate the instrument or remove it from
service.
If a calibration check fails to meet the acceptance criteria and it is not
possible to reanalyze the samples, the following actions must be taken:
- Report results between the last acceptable calibration check and the
failed calibration check as estimated (qualified with a “J”);
- Include a narrative of the problem; and
- Shorten the time period between verification checks or repair/replace
the instrument.
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If historically generated data demonstrate that a specific instrument
remains stable for extended periods of time, the interval between initial
calibration and calibration checks may be increased.
- Acceptable field data must be bracketed by acceptable checks. Data
that are not bracketed by acceptable checks must be qualified.
- Base the selected time interval on the shortest interval that the
instrument maintains stability.
- If an extended time interval is used and the instrument consistently
fails to meet the final calibration check, then the instrument may
require maintenance to repair the problem or the time period is too
long and must be shortened.
For continuous monitoring equipment, acceptable field data must be
bracketed by acceptable checks or the data must be qualified.
Sampling or field measurement instrument determined to be malfunctioning will
be repaired or will be replaced with a new piece of equipment.
Sample Custody Requirements 3.3.4
A program of sample custody will be followed during sample handling activities
in both field and laboratory operations. This program is designed to account for
each sample at all times. The appropriate sampling and laboratory personnel
will complete sample FDRs, chain-of-custody records, and laboratory receipt
sheets.
The primary objective of sample custody procedures is to obtain an accurate
written record that can trace the handling of all samples during the sample
collection process, through analysis, until final disposition.
Field Sample Custody
Sample custody for samples collected during each sampling event will be
maintained by the personnel collecting the samples. Samplers are responsible for
documenting each sample transfer and maintaining sample custody until the
samples are shipped off-site. The sample custody protocol followed by the
sampling personnel involves:
Recording sample locations, sample bottle identification, and specific
sample acquisition measures on appropriate forms;
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Using sample labels to document all information necessary for effective
sample tracking; and,
Completing sample FDR forms to establish sample custody in the field
before sample shipment.
Prepared labels are normally developed for each sample prior to sample
collection. At a minimum, each label will contain:
Duke Energy power plant (Roxboro);
Sample location (identification) and depth (if applicable);
Sample collection date and time; and,
Analyses requested; and
Preservative (if applicable).
Blank chain-of-custody records for each media will be provided by the analytical
laboratory. Analytical parameters and the bottle ware required for each
analytical parameter will be listed on the blank chain-of-custody records. A
chain-of-custody record documenting samples collected will be prepared each
day following sample collection. Chain-of-custody records document the
following:
Sample location/identification;
The requested analysis and applicable preservative;
The dates and times of sample collection;
The number of sample containers corresponding to each sample and
analysis;
The signature of the sampler completing the chain-of-custody form;
The date, time and sampler signature documenting the transfer of
sample custody from the sample crew to the courier or laboratory
personnel receiving the samples; and
The date, time and signature of the courier (or laboratory personnel)
documenting receipt and custody of the samples.
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Completed chain-of-custody forms will be photographed by the sample team
and the photograph will be forwarded to designated SynTerra personnel along
with daily progress reports to assist in tracking sample collection and analysis.
Sample Container Packing
Sample containers will be packed in plastic coolers for shipment or pick up by
the laboratory. Bottles will be packed tightly to reduce movement of bottles
during transport. Ice will be placed in the cooler along with the chain-of-custody
record in a separate, resealable, air tight, plastic bag. A temperature blank
provided by the laboratory will also be placed in each cooler prior to shipment if
required for the type of samples collected and analyses requested. Sample
coolers will be closed and secured using shipping tape and a signed custody seal
placed across the cooler lid and body to document that the sample cooler was not
opened during sample transport to the analytical laboratory.
Quality Assurance and Quality Control Samples 3.3.5
The following quality assurance/quality control (QA/QC) samples will be
collected during the proposed field activities:
Equipment rinse blanks (one per day);
Field Duplicates (one per 20 samples per sample medium)
Groundwater samples will be collected using low flow sampling techniques
utilizing either a peristaltic pump or submersible pump and new sample tubing.
Used sample tubing will be discarded following sample collection from
individual monitoring wells. Deionized water provided by the analytical
laboratory will be transferred directly into equipment blank sample containers
via new and unused sample tubing. The groundwater sampling equipment
blanks enable evaluation of bias (systematic errors) attributed to groundwater
sampling equipment.
A field duplicate is a replicate sample prepared at the sampling locations from
equal portions of all sample aliquots combined to make the sample. Both the
field duplicate and the sample are collected at the same time, in the same
container type, preserved in the same way, and analyzed by the same laboratory
as a measure of sampling and analytical precision.
Field QA/QC samples will be analyzed for the same constituents indicated in
Table 1.
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Decontamination Procedures 3.3.6
Proper decontamination of sampling equipment is essential to minimize the
possibility of cross contamination of samples. Previously used sampling
equipment will be decontaminated before sampling and between the collection
of each sample. New, disposable sampling equipment (e.g., peristaltic pump
tubing) will be used for sampling activities where possible.
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4.0 REPORT AND SCHEDULE
After evaluation, SynTerra will summarize the data in a report, which will contain
figures and tables to summarize the data; a map documenting sampling locations;
documentation of field observations including boring logs, sample descriptions, and
laboratory analytical data. The report will be prepared in accordance with industry
standards and will be signed and sealed by a North Carolina Licensed Engineer or
Geologist.
A proposed timeline for Work Plan implementation and assessment completion is
provided in Table 2.
TABLE 2
PROPOSED SCHEDULE FOR GYPSUM STORAGE AREA ASSESSMENT
ROXBORO STEAM ELECTRIC PLANT
TASK PROPOSED TIMELINE – AFTER APPROVAL BY
NCDEQ AND RECEIPT OF AUTHORIZATION
AND NOTICE TO PROCEED
Erosion and Sediment Control Plan 2 weeks
Erosion and Sediment Control Plan Approval 4 weeks after submittal of Erosion and Sediment
Control Plan
Monitoring Well Installation 4 weeks after approval of Erosion and Sediment
Control Plan
Sample Collection and Analysis 2 weeks after completion of well installation
Data Validation 2 weeks after receipt of laboratory analytical reports
Submittal of Assessment Report 8 weeks after completion of data validation

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5.0 REFERENCES
Duke Energy, 2014; http://www.duke-energy.com/pdfs/duke-energy-ash-metrics.pdf
(Updated June 23, 2016)
SynTerra. Proposed Groundwater Assessment Work Plan for Roxboro Steam Electric Plant
(Revision 1). December 30, 2014.
SynTerra. Comprehensive Site Assessment Report - Roxboro Steam Electric Plant. September
2, 2015.
SynTerra. Corrective Action Plan Part 1 - Roxboro Steam Electric Plant. December 1, 2015
SynTerra, Corrective Action Plan Part 2 – Roxboro Steam Electric Plant. February 29, 2016
SynTerra, Comprehensive Site Assessment Supplement 1 – Roxboro Steam Electric Plant.
August 1, 2016

Gypsum Storage Area Assessment Work Plan November 2016
Roxboro Steam Electric Plant SynTerra

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FIGURES
FIGURE 1
SITE LOCATION MAP
DUKE ENERGY PROGRESS
ROXBORO STEAM ELECTRIC PLANT
1700 DUNWAY RD
SEMORA, NORTH CAROLINA
OLIVE HILL, NC QUADRANGLE
148 RIVER STREET, SUITE 220GREENVILLE, SOUTH CAROLINAPHONE 864-421-9999www.synterracorp.com
PROPERTY BOUNDARY
CCR SURFACE IMPOUNDMENT
2000GRAPHIC SCALE1000
IN FEET
10000
RALEIGH
WILMINGTON
GREENVILLE
GREENSBORO
CHARLOTTE FAYETTEVILLE
1966 (EAST) ASH BASIN
1973 (WEST)ASH BASIN
SOURCE:USGS TOPOGRAPHIC MAP OBTAINED FROM THE USGS MAP STORE AThttp://store.usgs.gov/b2c_usgs/b2c/start/%%%28xcm=r3standardpitrex_prd%%%29/.do
11/10/2016 2:33 PM P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep & Reporting (EHS)\dwg\DE ROXBORO FIG 1 (USGS MAP WITH GYPSUM PAD).dwg
K. ST.CYR
FIG 1 (SITE LOC MAP)
10/25/2016
LAYOUT:MAP DATE: 2013
CONTOUR INTERVAL: 10ft
DATE:
PROJECT MANAGER: C. EADY
DRAWN BY:
ROXBORO STEAM ELECTRIC PLANTPERSON COUNTY
POWER PLANT
CCR SURFACE IMPOUNDMENT
EASTERN EXTENSIONIMPOUNDMENT
HEATED WATER DISCHARGE POND
SOUTHERN EXTENSIONIMPOUNDMENT
GYPSUM STORAGE
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APRIL 17, 2014 AERIAL PHOTOGRAPH OBTAINED FROM WSPNOTES:CW-1COMPLIANCE MONITORING WELL (SURVEYED)PZ-12PIEZOMETER (SURVEYED)ABMW-2CSA MONITORING WELL (SURVEYED)MW-2MONITORING WELL (SURVEYED)CCR SURFACE IMPOUNDMENT DUKE ENERGY PROGRESS PARCEL LINECCR SURFACE IMPOUNDMENT COMPLIANCEBOUNDARYNPDES TREATMENT UNIT COMBINED COMPLIANCE BOUNDARYGMW-8LANDFILL MONITORING WELL (SURVEYED)
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LEGENDEDC-1 MW-27PROPOSED CSA WELL LOCATIONPROPOSED SEDIMENT & WASTE WATERSAMPLE LOCATION
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DISCHARGE PIPE FROMSOUTH LANDFILL PONDNOT FIELD VERIFIED FLOW
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PROPOSED GYPSUM STORAGE AREAASSESSMENT WELLCOMBINED COMPLIANCE BOUNDARY WAS SUBMITTED TO NC DEQ ONAUGUST 19, 2016 AND IS PENDING APPROVAL GPMW-1 S/D/BR

FIGURE 4
TYPICAL WELL CONSTRUCTION SCHEMATICS

Typical Single-Cased Monitoring Well

Source: HDR, Inc.

Typical Double-Cased Monitoring Well

Source: HDR, Inc.

Typical Outer Casing Installation for Double Cased Monitoring Well

Source: HDR, Inc.

Typical Bollard Installation Detail

NOTE: 4 in. square aluminum protective casing may be used in place of 4 in. square steel protective casing.
Source: HDR, Inc.
Gypsum Storage Area Assessment Work Plan November 2016
Roxboro Steam Electric Plant SynTerra

P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep &
Reporting (EHS)\Gypsum Storage Area Assessment Work Plan, Roxboro Steam Electric Plant, Roxboro, NC.docx
TABLES

TABLE 1
GROUNDWATER MONITORING PARAMETERS AND ANALYTICAL METHODS
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
PARAMETER RL UNITS METHOD
pH NA SU Field Water Quality Meter
Specific Conductance NA µS/cm Field Water Quality Meter
Temperature NA ºC Field Water Quality Meter
Dissolved Oxygen NA mg/L Field Water Quality Meter
Oxidation Reduction Potential NA mV Field Water Quality Meter
Eh NA mV Field Water Quality Meter
Turbidity NA NTU Field Water Quality Meter
Aluminum 0.005 mg/L EPA 200.7 or 6010C
Antimony 0.001 mg/L EPA 200.8 or 6020A
Arsenic 0.001 mg/L EPA 200.8 or 6020A
Barium 0.005 mg/L EPA 200.7 or 6010C
Boron 0.05 mg/L EPA 200.7 or 6010C
Chromium 0.001 mg/L EPA 200.7 or 6010C
Cobalt 0.001 mg/L EPA 200.8 or 6020A
Copper 0.001 mg/L EPA 200.8 or 6020A
Hexavalent Chromium 0.00003 mg/L EPA 218.7
Iron 0.01 mg/L EPA 200.7 or 6010C
Lead 0.001 mg/L EPA 200.8 or 6020A
Manganese 0.005 mg/L EPA 200.7 or 6010C
Mercury 0.00005 mg/L EPA 245.1
Molybdenum 0.001 mg/L EPA 200.8 or 6020A
Nickel 0.001 mg/L EPA 200.8 or 6020A
Selenium 0.001 mg/L EPA 200.8 or 6020A
Strontium 0.005 mg/L EPA 200.7 or 6010C
Thallium (low level)0.0002 mg/L EPA 200.8 or 6020A
Vanadium (low level)0.0003 mg/L EPA 200.8 or 6020A
Zinc 0.005 mg/L EPA 200.7 or 6010C
Radium 226 1 pCi/L EPA 903.1 Modified
Radium 228 3 pCi/L EPA 904.0/SW846 9320 Modified
Uranium (233, 234, 236, 238)Varies by isotope µg/mL SW846 3010A/6020A
Alkalinity (as CaCO3)20 mg/L SM 2320B
Bicarbonate 20 mg/L SM 2320
Calcium 0.01 mg/L EPA 200.7
Carbonate 20 mg/L SM 2320
Chloride 0.1 mg/L EPA 300.0 or 9056A
Hardness NA mg/L as
CaCO3
EPA 130.1
Magnesium 0.005 mg/L EPA 200.7 or 6010C
Nitrate + Nitrite 0.023 mg-N/L EPA 353.2
Potassium 0.1 mg/L EPA 200.7
Methane 0.01 mg/L RSK - 175
Sodium 0.05 mg/L EPA 200.7
Sulfate 0.1 mg/L EPA 300.0 or 9056A
Sulfide 0.1 mg/L SM 4500 S2 D
Total Dissolved Solids 25 mg/L SM 2540C
Total Organic Carbon 0.1 mg/L SM5310C/EPA9060A
Total Suspended Solids 2 mg/L SM 2450D
Prepared by: JAW Checked by: BER
Notes:
NA indicates not applicable.
FIELD PARAMETERS
INORGANICS
RADIONUCLIDES
ANIONS/CATIONS/OTHER
1. Inorganics analyzed for total and dissolved (0.45 micron) concentrations.
P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep & Reporting (EHS)\Table 1 Groundwater Monitoring Parameters Page 1 of 1
Gypsum Storage Area Assessment Work Plan November 2016
Roxboro Steam Electric Plant SynTerra

P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep &
Reporting (EHS)\Gypsum Storage Area Assessment Work Plan, Roxboro Steam Electric Plant, Roxboro, NC.docx
APPENDIX A
MW-3BR AND MW-22D/BR/BRL
ASSESSMENT INFORMATION SUMMARY
GYPSUM, light gray brown to light brownish gray, dry,
loose, very fine grained, root fragments throughout.GYPSUM mixed with ash, trace of roots, loose to firm,very fine grained, dry, light brownish gray.
ASH, moist to wet, very fine grained, very dark gray.
SILT, loose to firm, trace of very fine sand, dry, trace ofclay, relic fabric, light orangish brown, very light brown,
and brownish greenish gray (saprolite).
SILT, trace of very fine sand, loose to very firm, dry,relic fabric, light orangish brown, light greenish gray,light greenish brown (saprolite).
SILT, trace of very fine sand, loose to very firm, dry,relic fabric, light orangish brown, light greenish gray
and light brownish gray (saprolite).
Partially weathered rock.
BIOTITE GNEISS with some BIOTITE SCHIST(interlayerd). Numerous fractures, portions weathered,upper zone near 28' is highly weathered (partially
weathered rock).
ML
ML
ML
Protective casing with
locking cap
6" PVC surface casing
2" Sch. 40 threaded PVC
riserGrout
Grout
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-03BR
5
10
15
20
25
30
35
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 1 OF 2
5/14/15
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:5/13/15
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION:
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
19882411.04
435.61 ft
68.0 ft BGS
P. Waldrep
995660.52
432.61 ft
24.85 ft TOC
S. Wixon
Cascade Drilling
Rotary Sonic
6 IN
LO
G

A

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N
N
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.
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.
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5
BIOTITE GNEISS with some BIOTITE SCHIST(interlayerd). Numerous fractures, portions weathered,upper zone near 28' is highly weathered (partially
weathered rock). (continued)
BIOTITE GNEISS, top of competent rock at 48',abundant fractures ~45' with staining or secondary
mineralization at ~49.2 to 49.6', light gray and darkgray.
BIOTITE GNEISS, fractures appear to be throughout,
some with secondary mineralization and/or weathering,appear to be a granitic gneiss zone at ~64-65', darkgray with banks of white, the possible granitic gneiss
interval is light brownish pink and light gray.
Bentonite seal
Sand Pack
2" pre-packed well screen
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-03BR
45
50
55
60
65
70
75
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 2 OF 2
5/14/15
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:5/13/15
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION:
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
19882411.04
435.61 ft
68.0 ft BGS
P. Waldrep
995660.52
432.61 ft
24.85 ft TOC
S. Wixon
Cascade Drilling
Rotary Sonic
6 IN
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

8
/
3
0
/
1
5
GYPSUM FLOUR
SAND, gray to brown, clayey.
SAND, brown, clayey.
SAND, gray to brown, silty with rock clasts.
SAPROLITE, buff to brown, silty with abundant rockclasts.
SCHIST, brownish gray, quartzose and micaceous,foliated with iron oxide staining.
SC
SC
SM
Protective casing withlocking cap
Grout (0'-52')
6" Sch. 40 threaded PVCSurface casing (0'-37')
2" Sch. 40 threaded PVCriser
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BR
5
10
15
20
25
30
35
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 1 OF 2
4/15/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/13/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981529.128
474.00 ft
72.0 ft BGS
J. Gilmer
994705.938
470.93 ft
16.38 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
SCHIST, brownish gray, quartzose and micaceous,
foliated with iron oxide staining. (continued)
METADIORITE, dark gray to black, fine to coarse
crystals, weakly foliated.
SCHIST, gray to black, foliated, fractured.
SCHIST, gray to black, foliated with lenticular gneissicbanding, fractured.
DIORITIC GNEISS, gray to black, foliated and fractured.
Borehole terminated 72' bgs. To facilitate wellconstruction, borehole abandoned to 70' bgs with sand.
Grout (0'-52')
Bentonite (52'-56.8')
Sand Pack (56.8'-70')
2" pre-packed well screen(60'-70')
Sand (70'-72')
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BR
45
50
55
60
65
70
75
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 2 OF 2
4/15/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/13/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981529.128
474.00 ft
72.0 ft BGS
J. Gilmer
994705.938
470.93 ft
16.38 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
GYPSUM FLOUR
SAND, gray to brown, clayey.
SAND, brown, clayey.
SAND, gray to brown, silty with rock clasts.
SAPROLITE, buff to brown, silty with abundant rockclasts.
SCHIST, brownish gray, quartzose and micaceous,foliated with iron oxide staining.
SC
SC
SM
Protective casing withlocking cap
Grout (0'-279')
6" Sch. 40 threaded PVCSurface casing
2" Sch. 40 threaded PVCriser
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
5
10
15
20
25
30
35
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 1 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
SCHIST, brownish gray, quartzose and micaceous,
foliated with iron oxide staining. (continued)
METADIORITE, dark gray to black, fine to coarse
crystals, weakly foliated.
SCHIST, gray to black, foliated, fractured.
SCHIST, gray to black, foliated with lenticular gneissicbanding, fractured.
DIORITIC GNEISS, gray to black, foliated and fractured.
Grout (0'-279')
Packer Test: 48'-54'(Recharge rate: 0.004 gpm)
Packer Test: 60'-66'
(Recharge rate: 0.13 gpm)
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
45
50
55
60
65
70
75
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 2 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
DIORITIC GNEISS, gray to black, foliated and fractured.
(continued)
GNEISS, composed of biotite, hornblende and chlorite,
strong foliation, vertical fractures present.
GNEISS, biotite-rich, feldspar, epidote, and quartz veins
present, quartz phenocrysts present.
Packer Test: 86'-92'(Recharge rate: 0.02 gpm)
Grout (0'-279')
Packer Test: 110'-116'
(Recharge rate: 0.02 gpm)
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
85
90
95
100
105
110
115
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 3 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
GNEISS, biotite-rich, feldspar, epidote, and quartz veins
present, quartz phenocrysts present. (continued)
AMPHIBOLITE, black, composed of fine to coarse biotite
and hornblende, vertical fractures present. Crystalsbecome fine ~140' bgs. Quartz and feldspar veins with
chlorite and epidote and some pyrite secondarymineralization along vein margins 140' bgs.
Packer Test: 139'-145'(Recharge rate: 0.15 gpm)
Grout (0'-279')
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
125
130
135
140
145
150
155
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 4 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
AMPHIBOLITE, black, composed of fine to coarse biotiteand hornblende, vertical fractures present. Crystals
become fine ~140' bgs. Quartz and feldspar veins withchlorite and epidote and some pyrite secondarymineralization along vein margins 140' bgs. (continued)
GRANITIC GNEISS, epidote secondary mineralization insuture fractures.
AMPHIBOLITE GNEISS, gray to black, with epidote
secondary mineralization in sutured fractures.
GNEISS, gray with black banding (bands composed ofbiotite and hornblende), multiple fractures sutured by
epidote and feldspar. Chlorite crystals observed 202'-207'bgs.
Packer Test: 164'-170'(Recharge rate: 0.7 gpm)
Grout (0'-279')
Packer Test: 183'-189'(Recharge rate: 0.64 gpm)
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
165
170
175
180
185
190
195
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 5 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
GNEISS, gray with black banding (bands composed ofbiotite and hornblende), multiple fractures sutured by
epidote and feldspar. Chlorite crystals observed 202'-207'
bgs. (continued)
GNEISS, composed of biotite, small to coarse crystals,occassional feldspar veins, generally massive texture.
Vertical fractures 217'-223' bgs.
GNEISS, composed of biotite and chlorite, quartz andfeldspar veins with epidote and pyrite secondary
mineralization along vein margins.
GNEISS, black to dark gray, composed of biotite, chlorite
and hornblende, crystals fine to coarse.
Packer Test: 194'-200'(Recharge rate: 0.67 gpm)
Grout (0'-279')
Packer Test: 217'-223'
(Recharge rate: 0.9 gpm)
Packer Test: 230'-236'
(Recharge rate: 1.2 gpm)
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
205
210
215
220
225
230
235
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 6 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
GNEISS, black to dark gray, composed of biotite, chlorite
and hornblende, crystals fine to coarse. (continued)
GNEISS, composed of biotite, crystals fine to coarse,
mild banding. Vertical fractures ~301' bgs.
Grout (0'-279')
Packer Test: 255'-261'
(Recharge rate: 1.22 gpm)
Packer Test: 274'-280'(Recharge rate: 0.91 gpm)
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
245
250
255
260
265
270
275
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 7 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
GNEISS, composed of biotite, crystals fine to coarse,
mild banding. Vertical fractures ~301' bgs. (continued)
Borehole terminated 302' bgs. To facilitate well
construction, borehole abandoned to 300' bgs with sand.
Bentonite (279'-284.7')
Sand Pack (284.7'-300')
2" pre-packed well screen(290'-300')
Sand (300'-302')
Packer Test: 292'-302'(Recharge rate: 1.22 gpm)
SA
M
P
L
E
DESCRIPTION
BL
O
W
CO
U
N
T
S
MW-22BRL
285
290
295
300
305
310
315
GR
A
P
H
I
C
LO
G
US
C
S
DE
P
T
H
(f
t
)
PAGE 8 OF 8
4/13/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/4/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
C
O
V
.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981526.188
474.08 ft
300.0 ft BGS
J. Gilmer
994705.94
470.79 ft
69.02 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
G

A

E
W
N
N
0
4

D
E
P

R
O
X
B
O
R
O
.
G
P
J

G
I
N
T

S
T
D

A
4

A
S
T
M

L
A
B
.
G
D
T

7
/
2
7
/
1
6
GYPSUM FLOUR
SAND, gray to brown, clayey.
SAND, brown, clayey.
SAND, gray to brown, silty with rock clasts.
SAPROLITE, buff to brown, silty with abundant rockclasts.
SCHIST, brownish gray, quartzose and micaceous,
foliated with iron oxide staining.
Borehole terminated 40' bgs. To facilitate wellconstruction, borehole abandoned to 36' bgs with sand.
SC
SC
SM
Protective casing withlocking cap
Grout (0'-20')
2" Sch. 40 threaded PVCriser
Bentonite (20'-22')
Sand Pack (22'-36')
2" pre-packed well screen
(26'-36')
Sand (36'-40')
SA
M
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DESCRIPTION
BL
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CO
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MW-22D
5
10
15
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25
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PAGE 1 OF 1
4/14/16
DRILLING COMPANY:
DRILLING METHOD:
BOREHOLE DIAMETER:
NOTES:
COMPLETED:4/14/16
CLIENT: Duke Energy Progress, LLC.
PROJECT:
PROJECT NO:
PROJECT LOCATION: Semora, NC
Roxboro Station
1026.107
WELLCONSTRUCTIONPI
D
(p
p
m
)
WELL / BORING NO:
STARTED:
RE
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.
(%
)
SynTerra148 River Street, Suite 220
Greenville, South Carolina 29601Phone: [phone]
PWR: Partially Weathered Rock
1981520.307
474.05 ft
36.0 ft BGS
J. Gilmer
994705.944
470.79 ft
16.35 ft TOC
W. Wimberley
Cascade Drilling
Rotary Sonic
6 IN
NORTHING:
G.S. ELEV:
DEPTH TO WATER:
LOGGED BY:
EASTING:
M.P. ELEV:
TOTAL DEPTH:
CHECKED BY:
LO
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APPENDIX A
MW-3BR AND MW-22 CLUSTER ANALYTICAL RESULTS
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep & Reporting (EHS)\Appendix A_MW-3BR and MW-22 Cluster Analytical Results.xlsx Page 1 of 4
Aluminum Aluminum Aluminum Antimony Antimony Antimony Arsenic Arsenic Arsenic Barium Barium Barium Beryllium Beryllium Beryllium Boron Boron Boron
DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT
S.U.ft Deg C umhos/cm mg/L mV mV NTU mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L
6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE NE NE 1*NE NE 10 NE NE 700 NE NE 4*NE NE NE 700 NE
Sample ID Sample Collection Date
MW-3BR 05/29/2015 6.6 25.44 21 2424 0.7 31 236 3.5 0 250 292 NA 122 <1 NA <1 <1 NA <1 51 NA 49 <1 NA <1 250 2290 NA 2310 NA
MW-3BR DUP 05/29/2015 6.6 25.44 21 2424 0.7 31 236 3.5 0 250 293 NA 126 <1 NA <1 <1 NA <1 49 NA 48 <1 NA <1 250 2280 NA 2270 NA
MW-3BR 06/30/2015 6.8 25.00 20 2498 2.49 5 210 8.96 NM NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR 09/16/2015 6.7 27.33 18 2441 0.9 92 297 7.77 0 280 <5 <5 233 <1 <1 <1 <1 <1 <1 42 43 43 <1 <1 <1 280 2560 2540 2550 NA
MW-3BR 12/04/2015 6.6 23.04 13 2460 0.53 93 298 2.84 0 277 <5 <5 54 <1 <1 <1 <1 <1 <1 38 35 35 <1 <1 <1 277 2700 2610 2700 NA
MW-3BR 01/06/2016 6.8 22.42 1 2659 0.9 7 212 3 0 269 <5 NA 125 <1 NA <1 <1 NA <1 37 NA 41 <1 NA <1 269 2760 NA 2680 NA
MW-3BR 09/23/2016 6.6 25.86 20 2483 0.55 122 327 4.99 0 284 <5 NA 12 <1 NA <1 <1 NA <1 36 NA 37 M2,R1 <1 NA <1 284 2880 NA 2860 NA
MW-22BR 06/20/2016 7.1 16.84 20 1101 1.64 33 238 7.88 0 310 <5 NA 117 <1 NA <1 <1 NA <1 80 NA 89 <1 NA <1 310 460 NA 452 NA
MW-22BR 07/27/2016 7.0 17.35 22 1199 0.37 54 259 3.01 NM 315 <5 NA 33 <1 NA <1 <1 NA <1 76 NA 84 <1 NA <1 315 472 NA 460 NA
MW-22BR 09/26/2016 7.1 19.58 19 1169 0.48 47 252 2.65 0.5 309 <5 NA 53 <1 NA <1 <1 NA 1.11 72 NA 86 <1 NA <1 309 457 NA 485 NA
MW-22BRL 09/27/2016 11.8 35.97 22 1407 0.68 -111 94 6.05 NM 298 D4 208 NA 259 <1 NA <1 <1 NA <1 165 NA 164 <1 NA <1 298 81 NA 83 NA
MW-22D 06/20/2016 6.5 16.73 17 2175 1.51 43 248 8.04 0 267 M1 7 NA 355 <1 NA <1 <1 NA <1 50 NA 52 <1 NA <1 267 383 NA 377 <1000
MW-22D 07/27/2016 6.4 17.81 19 2434 0.53 87 292 3 0 286 9 NA 73 <1 NA <1 <1 NA <1 46 NA 46 <1 NA <1 286 403 NA 395 NA
MW-22D 09/26/2016 6.2 19.13 18 2099 0.33 111 316 3.9 0.5 221 6 NA 129 <1 NA <1 <1 NA <1 49 NA 55 <1 NA <1 221 304 NA 318 NA
Prepared by: BER Checked by: CDE
Notes:
- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
Deg C = Degree Celsius mg-N/L = milligram nitrogen per liter pCi/L = picocures per liter
DIS = Dissolved mV = millivolts S.U. = Standard Unit
DO = Dissolved Oxygen NA = Not analyzed Spec Cond = Specific Conductance
DUP = Duplicate NE = Not established Temp = Temperature
Eh = Redox Potential NM = Not measured ug/L = microgram per liter
ft = Feet NTU = nephelometric turbidity unit ug/mL = micrograms per milliliter
mg/L = milligrams per liter ORP = Oxidation Reduction Potential umhos/cm = micro mhos per centimeter
< = concentration not detected at or above the reporting limit.
^ = NC DHHS Health Screening Level.
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
D4 = Sample was diluted due to the presence of high levels of target analytes.
M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
M2 = Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable.
M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level.
R1 = RPD value was outside control limits.
Analytical Results
B1 = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10X the concentration in the method blank.
Analyte concentration in sample is not affected by blank contamination.
DOSpec
CondTemp
Field Parameters
15A NCAC 02L Standard
Reporting Units
Analytical Parameter AlkalinityFerrous
IronTurbidityEhORPWater
LevelpH BromideBi-carbonate Alkalinity
APPENDIX A
MW-3BR AND MW-22 CLUSTER ANALYTICAL RESULTS
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep & Reporting (EHS)\Appendix A_MW-3BR and MW-22 Cluster Analytical Results.xlsx Page 2 of 4
Cadmium Cadmium Cadmium Calcium Chromium
(VI)Chromium Chromium Chromium Cobalt Cobalt Cobalt Copper Copper Copper Iron Iron Iron Lead Lead Lead Magnesium Manganese Manganese Manganese Mercury Mercury Mercury
DIS DIS (0.1u)TOT TOT TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT
ug/L ug/L ug/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L
NE NE 2 NE NE 250 0.07^NE NE 10 NE NE 1*NE NE 1000 300 300 300 NE NE 15 NE NE NE 50 NE NE 1
Sample ID Sample Collection Date
MW-3BR 05/29/2015 <1 NA <1 348 <10 71 NA <1 NA <1 3.85 NA 4.08 4.64 NA 7.06 33 NA 148 <1 NA <1 157 181 NA 189 <0.05 NA <0.05
MW-3BR DUP 05/29/2015 <1 NA <1 351 <10 71 NA <1 NA <1 3.31 NA 3.55 5.94 NA 7.31 32 NA 146 <1 NA <1 165 171 NA 172 <0.05 NA <0.05
MW-3BR 06/30/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR 09/16/2015 <1 <1 <1 327 <10 76 NA <1 <1 <1 2.16 2.43 2.51 8.42 8.44 14.9 47 40 308 <1 <1 <1 152 48 50 49 <0.05 <0.05 <0.05
MW-3BR 12/04/2015 <1 <1 <1 362 <5 77 0.4 <1 <1 <1 1.64 1.27 1.32 10.1 9.65 13.9 10 <10 55 <1 <1 <1 165 35 31 26 <0.05 <0.05 <0.05
MW-3BR 01/06/2016 <1 NA <1 374 <5 76 0.26 <1 NA <1 2.02 NA 2.44 11.2 NA 11.2 10 NA 140 <1 NA <1 173 37 NA 44 <0.05 NA <0.05
MW-3BR 09/23/2016 <1 NA <1 340 <5 71 <0.03 <1 NA <1 1.32 NA 1.44 10.4 NA 15 24 NA 26 <1 NA <1 157 32 NA 29 <0.05 NA <0.05
MW-22BR 06/20/2016 <1 NA <1 148 <5 23 0.088 <1 NA <1 4.3 NA 6.14 2.15 NA 3.61 <10 NA 277 <1 NA <1 57.5 1910 NA 1420 <0.05 NA <0.05
MW-22BR 07/27/2016 <1 NA <1 146 B1 <5 25 0.048 <1 NA <1 3.42 NA 5.5 2.08 NA 2.23 <10 NA 78 <1 NA <1 55.6 1820 NA 1250 <0.05 NA <0.05
MW-22BR 09/26/2016 <1 NA <1 149 M4 <5 24 <0.03 <1 NA <1 3.49 NA 11.4 1.48 NA <1 63 NA 568 <1 NA <1 57.3 M4 1930 NA 2080 <0.05 NA <0.05
MW-22BRL 09/27/2016 <1 NA <1 35.1 M4 <5 6.8 1.4 1.68 NA 2.78 <1 NA <1 <1 NA <1 <10 NA 85 <1 NA <1 0.265 M4 <5 NA 6 <0.05 NA <0.05
MW-22D 06/20/2016 <1 NA <1 430 <5 28 <0.03 <1 NA <1 2.8 NA 3.14 <1 NA 1.11 <10 NA 320 <1 NA <1 93.1 1180 NA 1250 <0.05 NA <0.05
MW-22D 07/27/2016 <1 NA <1 157 B1 <5 24 <0.03 <1 NA <1 4.65 NA 5.81 1.05 NA <1 <10 NA 80 <1 NA <1 90.6 1740 NA 1790 <0.05 NA <0.05
MW-22D 09/26/2016 <1 NA <1 319 M4 <5 26 <0.03 <1 NA <1 14 NA 13.6 <1 NA <1 643 NA 820 <1 NA <1 97.1 M4 3770 NA 3860 <0.05 NA <0.05
Prepared by: BER Checked by: CDE
Notes:
- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
Deg C = Degree Celsius mg-N/L = milligram nitrogen per liter pCi/L = picocures per liter
DIS = Dissolved mV = millivolts S.U. = Standard Unit
DO = Dissolved Oxygen NA = Not analyzed Spec Cond = Specific Conductance
DUP = Duplicate NE = Not established Temp = Temperature
Eh = Redox Potential NM = Not measured ug/L = microgram per liter
ft = Feet NTU = nephelometric turbidity unit ug/mL = micrograms per milliliter
mg/L = milligrams per liter ORP = Oxidation Reduction Potential umhos/cm = micro mhos per centimeter
< = concentration not detected at or above the reporting limit.
^ = NC DHHS Health Screening Level.
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
D4 = Sample was diluted due to the presence of high levels of target analytes.
M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
M2 = Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable.
M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level.
R1 = RPD value was outside control limits.
B1 = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10X the concentration in the method blank. Analyte concentration in sample
is not affected by blank contamination.
Analytical Results
Reporting Units
15A NCAC 02L Standard
Analytical Parameter ChlorideCarbonate
Alkalinity
APPENDIX A
MW-3BR AND MW-22 CLUSTER ANALYTICAL RESULTS
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep & Reporting (EHS)\Appendix A_MW-3BR and MW-22 Cluster Analytical Results.xlsx Page 3 of 4
Molybdenum Molybdenum Molybdenum Nickel Nickel Nickel Potassium Selenium Selenium Selenium Sodium Strontium Strontium Strontium Thallium Thallium Thallium Vanadium Vanadium Vanadium
DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT TOT DIS DIS (0.1u)TOT TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT DIS DIS (0.1u)TOT
ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L mg/L mg/L ug/L ug/L ug/L mg/L mg/L mg/L ug/L ug/L ug/L
NE NE NE NE NE NE 100 10 NE NE NE 20 NE NE NE NE 250 NE NE NE 0.2*500 NE NE NE NE 0.3*
Sample ID Sample Collection Date
MW-3BR 05/29/2015 250 <1 NA <1 1.65 NA 1.75 0.15 2.89 6.34 NA 6.02 47.7 1330 NA 1370 1200 <0.5 <0.2 NA <0.2 2100 1.6 5 10.2 NA 18.8
MW-3BR DUP 05/29/2015 170 <1 NA <1 1.49 NA 1.61 0.159 2.81 6.23 NA 6.21 46.9 1350 NA 1340 1200 <0.5 <0.2 NA <0.2 2200 1.5 5 10.6 NA 11.5
MW-3BR 06/30/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR 09/16/2015 270 <1 <1 <1 1.02 1.17 1.23 0.133 2.76 6.42 6.68 7.13 47.4 1390 1410 1410 1300 <0.5 <0.2 <0.2 <0.2 2400 1.4 11 13.4 13.1 15.7
MW-3BR 12/04/2015 180 <1 <1 <1 1.17 <1 1.06 0.104 3.02 5.98 5.93 7 54.6 1450 1410 1320 1300 <0.5 <0.2 <0.2 <0.2 2300 1.4 <5 13.4 13.8 15
MW-3BR 01/06/2016 144 <1 NA <1 1.12 NA 1.19 0.081 3.31 5.31 NA 5.03 56.3 1410 NA 1470 1400 <0.1 <0.2 NA <0.2 2300 1.4 <5 13.9 NA 14
MW-3BR 09/23/2016 524 <1 NA <1 1.01 NA 1.18 0.055 3.25 4.45 NA 4.7 59.5 1410 NA 1420 1300 <0.1 <0.2 B2 NA <0.2 B2 2400 1.4 <5 14.9 NA 15.4
MW-22BR 06/20/2016 <10 7.34 NA 8.45 2.6 NA 2.72 0.355 10.9 3.01 NA 2.58 46.9 525 NA 539 350 <0.1 <0.2 NA <0.2 870 2.6 <5 1.01 NA 2.08 B2
MW-22BR 07/27/2016 <10 7.68 NA 8.84 3.05 NA 2.76 0.175 10.3 2.1 NA 1.37 45.4 519 NA 552 380 <0.1 <0.2 NA <0.2 860 2.5 <5 0.893 NA 1.68
MW-22BR 09/26/2016 10.9 8.86 NA 8.73 2.01 NA <1 <0.01 9.91 1.28 NA <1 44.7 509 NA 556 370 <0.1 <0.2 NA <0.2 860 2.5 <5 0.823 NA 1.17
MW-22BRL 09/27/2016 <10 8.94 NA 8.52 <1 NA <1 <0.01 129 2.17 NA 3.52 61.1 1900 NA 1910 120 <0.1 <0.2 NA <0.2 560 2.7 6 1.28 NA 1.56
MW-22D 06/20/2016 <10 <1 NA <1 2 NA 1.92 0.939 3.2 405 NA 416 48.2 1550 NA 1600 1400 <0.1 <0.2 NA <0.2 2200 2.6 9 3.18 NA 3.79 B2
MW-22D 07/27/2016 <10 <1 NA <1 1.61 NA 2.11 0.568 2.74 291 NA 331 M4 41.8 1740 NA 1710 1500 <0.1 <0.2 NA <0.2 2300 2.3 5.6 2.95 NA 3.33
MW-22D 09/26/2016 146 <1 NA <1 2.59 NA 2.44 <0.01 2.18 26 NA 25.6 96.4 1620 NA 1680 1200 <0.1 <0.2 NA <0.2 2000 3.1 <5 2.15 NA 2.53
Prepared by: BER Checked by: CDE
Notes:
- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
Deg C = Degree Celsius mg-N/L = milligram nitrogen per liter pCi/L = picocures per liter
DIS = Dissolved mV = millivolts S.U. = Standard Unit
DO = Dissolved Oxygen NA = Not analyzed Spec Cond = Specific Conductance
DUP = Duplicate NE = Not established Temp = Temperature
Eh = Redox Potential NM = Not measured ug/L = microgram per liter
ft = Feet NTU = nephelometric turbidity unit ug/mL = micrograms per milliliter
mg/L = milligrams per liter ORP = Oxidation Reduction Potential umhos/cm = micro mhos per centimeter
< = concentration not detected at or above the reporting limit.
^ = NC DHHS Health Screening Level.
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
D4 = Sample was diluted due to the presence of high levels of target analytes.
M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
M2 = Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable.
M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level.
R1 = RPD value was outside control limits.
B1 = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10X the concentration in the method blank. Analyte concentration in sample is
not affected by blank contamination.
Analytical Results
Analytical Parameter
Reporting Units
15A NCAC 02L Standard
Methane Nitrate
+ Nitrite SulfideSulfate Total Suspended Solids
TotalOrganicCarbon
TotalDissolvedSolids
APPENDIX A
MW-3BR AND MW-22 CLUSTER ANALYTICAL RESULTS
ROXBORO STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, SEMORA, NC
P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep & Reporting (EHS)\Appendix A_MW-3BR and MW-22 Cluster Analytical Results.xlsx Page 4 of 4
Zinc Zinc Zinc
DIS DIS (0.1u)TOT
ug/L ug/L ug/L pCi/L pCi/L ug/mL ug/mL ug/mL ug/mL ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L
NE NE 1000 NE NE NE NE NE NE NE NE NE NE NE 0.07^NE NE NE NE NE NE NE NE NE NE
Sample ID SampleCollection Date
MW-3BR 05/29/2015 8 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR DUP 05/29/2015 <5 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR 06/30/2015 NA NA NA NA NA NA NA NA NA <0.036 <0.099 <0.06 <0.045 <0.06 0.769 25.8 <5 132 <0.39 0.435 3.76 <0.041 <0.071 <0.071 <0.071
MW-3BR 09/16/2015 <5 <5 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR 12/04/2015 12 <5 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR 01/06/2016 <5 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-3BR 09/23/2016 <5 NA <5 <1 <1 <0.00005 <0.00005 <0.00005 0.043 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-22BR 06/20/2016 <5 NA <5 <1 0.676 <0.00005 <0.00005 <0.00005 0.00331 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-22BR 07/27/2016 9 NA <5 0.605 0.465 <0.00005 <0.00005 <0.00005 0.00329 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-22BR 09/26/2016 <5 NA <5 0.734 <1 <0.00005 <0.00005 <0.00005 0.00297 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-22BRL 09/27/2016 <5 NA <5 1.93 0.881 <0.00005 <0.00005 <0.00005 <0.0002 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-22D 06/20/2016 <5 NA <5 <1 0.804 <0.00005 <0.00005 <0.00005 0.00297 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-22D 07/27/2016 <5 NA <5 1.02 0.485 <0.00005 <0.00005 <0.00005 0.00284 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW-22D 09/26/2016 <5 NA <5 <1 <1 <0.00005 <0.00005 <0.00005 0.000964 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Prepared by: BER Checked by: CDE
Notes:
- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013.
Deg C = Degree Celsius mg-N/L = milligram nitrogen per liter pCi/L = picocures per liter
DIS = Dissolved mV = millivolts S.U. = Standard Unit
DO = Dissolved Oxygen NA = Not analyzed Spec Cond = Specific Conductance
DUP = Duplicate NE = Not established Temp = Temperature
Eh = Redox Potential NM = Not measured ug/L = microgram per liter
ft = Feet NTU = nephelometric turbidity unit ug/mL = micrograms per milliliter
mg/L = milligrams per liter ORP = Oxidation Reduction Potential umhos/cm = micro mhos per centimeter
< = concentration not detected at or above the reporting limit.
^ = NC DHHS Health Screening Level.
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013.
D4 = Sample was diluted due to the presence of high levels of target analytes.
M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
M2 = Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable.
M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level.
R1 = RPD value was outside control limits.
Analytical Results
B1 = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10X the concentration in the method blank.
Analyte concentration in sample is not affected by blank contamination.
Analytical Parameter
Reporting Units
15A NCAC 02L Standard
DMAsMMAsAs(V)As(III)Uranium-238Uranium-236Uranium-234Uranium-233Radium-228Radium-226 As (UK)Se (UK)SeMeMeSe(IV)SeCNSe(VI)Se(IV)Mn(IV)Mn(II)Fe(III)Fe(II)Cr(VI)
Gypsum Storage Area Assessment Work Plan November 2016
Roxboro Steam Electric Plant SynTerra

P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\32.Gypsum Assessment Work Plan Prep &
Reporting (EHS)\Gypsum Storage Area Assessment Work Plan, Roxboro Steam Electric Plant, Roxboro, NC.docx
APPENDIX B
LOW FLOW SAMPLING PLAN DUKE ENERGY
FACILITIES ASH BASIN GROUNDWATER
ASSESSMENT PROGRAM

Low Flow Sampling Plan
Duke Energy
Facilities
Ash Basin Groundwater Assessment Program
North Carolina
May 1, 2015

Duke Energy | Low Flow Groundwater Sampling Plan
Appendices

TABLE OF CONTENTS
Low Flow Sampling Plan ....................................................................................................... 1
1.0 PURPOSE ............................................................................................................................... 1
2.0 GENERAL CONSIDERATIONS ............................................................................................. 1
3.0 PROCEDURES ....................................................................................................................... 2
3.1 Pre-Job Preparation ............................................................................................................. 2
3.2 Water-Level Measurements ................................................................................................. 3
3.3 Well Purging ........................................................................................................................ 4
3.3.1 Low-Flow Well Purging ............................................................................................ 4
3.3.2 Volume-Averaging Well Purging .............................................................................. 7
3.4 Sampling ......................................................................................................................... 9
3.4.1 Low-Flow Sampling ................................................................................................. 9
3.4.2 Sampling after Volume-Averaging Purge ............................................................... 10
3.5 Sample Handling, Packing, and Shipping ..................................................................... 10
3.5.1 Handling ................................................................................................................ 10
3.5.2 Sample Labels ....................................................................................................... 10
3.5.3 Sample Seals .......................................................... Error! Bookmark not defined.
3.5.4 Chain-of-Custody Record ...................................................................................... 11
3.6 Field Quality Control Samples ....................................................................................... 11
3.7 Field Logbook Documentation....................................................................................... 12
3.8 Decontamination and Waste Management ................................................................... 13
4.0 REFERENCES ..................................................................................................................... 13
Decontamination of Equipment SOP .......................................................................................... 14
1.0 1.0 Purpose & Application ................................................................................................ 15
2.0 Equipment & Materials .......................................................................................................... 15
3.0 Procedure ............................................................................................................................. 15
3.1 Decontamination of Non-disposable Sampling Equipment .......................................... 15
3.2 Decontamination of Field Instrumentation .................................................................... 15
3.3 Decontamination of Groundwater Sampling Equipment ............................................... 16
3.4 Materials from Decontamination Activities .................................................................... 16
Sampling Equipment Check List – Table 1 ................................................................................. 17
Field Logbook/Data Sheets ......................................................................................................... 19
Duke Energy | Low Flow Groundwater Sampling Plan
Appendices

Appendices
Appendix A – Decontamination of Equipment SOP

Appendix B – Sampling Equipment Check List – Table 1

Appendix C – Field Logbook/Data Sheets

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1.0 PURPOSE

1

1.0 PURPOSE
The purpose of this low flow sampling plan is to establish a standard operating
procedure (SOP) to describe collection procedures for groundwater samples from
monitoring wells using low-flow purging and sampling techniques or by the volume-
averaged purging and sampling method at Duke Energy Ash Basin Groundwater
Assessment Program facilities.

2.0 GENERAL CONSIDERATIONS
Potential hazards associated with the planned tasks shall be thoroughly evaluated prior
to conducting field activities. The Ready-To-Work Plan developed for each facility
provides, among other items, a description of potential hazards and associated safety
and control measures.
Sampling personnel must wear powder-free nitrile gloves or equivalent while
performing the procedures described in this SOP. Specifically, gloves must be worn
while preparing sample bottles, preparing and decontaminating sampling equipment,
collecting samples, and packing samples. At a minimum, gloves must be changed
prior to the collection of each sample, or as necessary to prevent the possibility of
cross-contamination with the sample, the sample bottles, or the sampling equipment.
Field sampling equipment shall be decontaminated in accordance with the
Decontamination of Equipment SOP (Appendix A) prior to use. Although sampling
should typically be conducted from least to most impacted location, field logistics may
necessitate other sample collection priorities. When sampling does not proceed from
least to most impacted location, precautions must be taken to ensure that appropriate
levels of decontamination are achieved.
An example of equipment needed to properly conduct low-flow purging and sampling or
volume- averaged groundwater purging and sampling is listed on the example checklist
in Table 1 (Appendix B).
If a portable generator is used to power the purge pump, it shall be attempted to be
located downwind of the well being sampling to avoid cross-contamination of the sample
with exhaust from the generator motor.

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3.0 PROCEDURES

The following sections describe the general operating procedures and methods
associated with groundwater sampling. Any variation in these procedures must be
approved by the Project Manager (PM) and Quality Assurance/Quality Control (QA/QC)
Lead and must be fully documented. Field work cannot progress until deviations are
approved or resolved.
3.1 Pre-Job Preparation
The information listed below may be reviewed prior to sampling activities, if available,
and can be beneficial on-site for reference in the field as necessary:
• A list of the monitoring wells to be sampled;
• Information describing well location, using site-specific or topographic maps or
Global Positioning System (GPS) coordinates and descriptions tied directly to
prominent field markers;
• A list of the analytical requirements for each sampling location;
• Boring logs and well construction details, if available;
• Survey data that identify the documented point of reference (V-notch or other
mark on well casing) for the collection of depth-to-groundwater and total well
depth measurements;
• Previous depth-to-groundwater measurements;
• Previous pump placement depths (dedicated pumps as well as portable pumps)
for each sampling location, if available;
• Previous pump settings and pumping and drawdown rates, if available; and
• Previous analytical results for each monitoring well, if known.
The information above is useful when determining the sampling order, pump intake
depth, and purge and recharge rates, and can facilitate troubleshooting.
The following activities should be completed prior to mobilizing to the site:
• Obtain equipment necessary for completing the sampling activities (see the
example checklist in Table 1).
• Ensure appropriate laboratory-provided bottles are available for both the required
analyses and for QC samples and that there has been thorough coordination with
the analytical laboratory.

• Obtain site-specific maps or GPS coordinates showing clearly marked
monitoring well locations or groundwater sample points.
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• Review the project work control documents such as the Ready-To-Work Plan,
and appropriate SOPs in an effort to determine project-specific sampling
requirements, procedures, and goals.
• Verify that legal right-of-entry has been obtained and site access has been
granted, where required.
• Instruct the field team to avoid discussing project data with the public and to refer
questions to the Project Manager.
3.2 Water-Level Measurements

Prior to pump placement, an initial depth-to-water level and total well depth should be
measured. For monitoring wells screened across the water table, this measurement
shall be used to determine the required depth to the pump intake (typically, approximately
the mid-point of the saturated screen length for low-flow purging and sampling). The
procedure for measuring water levels may include the following:
1) Inspect the well head area for evidence of damage or disturbance. Record
notable observations in the field logbook.
2) Carefully open the protective outer cover of the monitoring well noting the
presence of bee hives and/or spiders, as these animals are frequently found
inside well covers. Remove any debris that has accumulated around the riser
near the well plug. If water is present above the top of the riser and well plug,
remove the water prior to opening the well plug. Do not open the well until the
water above the well head has been removed.
3) If practical, well plugs shall be left open for approximately five minutes to allow
the static water level to equilibrate before measuring the water level (if well plugs
are vented, then a waiting period is not applicable).
4) Using an electronic water-level indicator accurate to 0.01 feet, determine the
distance between the established point of reference (usually a V-notch or
indelible mark on the well riser) and the surface of the standing water present in
the well. Record these data in the field logbook. Repeat this measurement until
two successive readings agree to within 0.01 feet.
5) Using an electronic water-level indicator accurate to 0.01 feet, determine the
distance between the established point of reference (usually a V-notch or
indelible mark on the well riser) and the bottom of the well. Note that there
should not be considerable slack in the water-level indicator cable. Record
these data in the field logbook. Repeat this measurement until two successive
readings agree to within 0.01 feet.
6) If the monitoring well has the potential to contain non-aqueous phase liquids
(NAPLs), probe the well for these materials using an optical interface probe.
These wells will be attempted to be identified by the Project Manager prior to
mobilizing to the well. If NAPL is present, consult the Project Manager for
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direction on collecting samples for analysis. In general, do not collect
groundwater samples from monitoring wells containing NAPL.
7) Decontaminate the water-level indicator (and interface probe, if applicable)
and return the indicator to its clean protective casing.
3.3 Well Purging

Wells must be purged prior to sampling to ensure that representative groundwater is
obtained from the water-bearing unit. If the well has been previously sampled in
accordance with this sampling plan, then the depth to the pump intake and the pumping
rates should be duplicated to the extent possible during subsequent sampling events.

Section 3.3.1 provides a description of low-flow well purging, and Section 3.3.2 provides
a description of volume-averaging well purging (in the case it’s needed).

3.3.1 Low-Flow Well Purging

Adjustable-rate peristaltic, bladder and electric submersible pumps are preferred for use
during low-flow purging and sampling activities. Note that a ball valve (or similar valve
constructed of polyethylene or brass) may need to be installed to reduce the flow rate to
the required level. The low-flow purging and sampling guidance is provided below:
1) Using the specific details of well construction and current water-level
measurement, determine the pump intake set depth (typically the approximate
mid-point of the saturated well screen or other target sample collection depth
adjacent to specific high-yield zones).
2) Attach tubing and supporting rope to the pump and very slowly lower the unit until
the pump intake depth is reached. Measure the length of supporting rope
required, taking into account the pump length, to attain the required depth.
Record the depth to the pump intake in the field logbook.
Notes: 1) Sampling shall use new certified-clean disposable tubing. 2)
Rope shall be clean, unused, dedicated nylon rope. If a pump is to remain
in a well as part of a separate monitoring program, then the rope shall be
suspended within the well above the water column for future use. If the
pump is removed after sample collection, the rope shall be disposed.
3) After allowing time for the water level to equilibrate, slowly lower the electronic
water-level probe into the well until the probe contacts the groundwater. Record
the water level in the field logbook.

4) If the well has been previously sampled using low-flow purging and sampling
methods, begin purging at the rate known to induce minimal drawdown.
Frequently check the drawdown rate to verify that minimum drawdown is being
maintained. If results from the previous sampling event are not known, begin
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purging the well at the minimum pumping rate of approximately 100 milliliters per
minute (mL/min) (EPA, July 1996). Slowly increase the pumping rate to a level
that does not cause the well to drawdown more than about 0.3 feet, if possible.
Never increase the pumping rate to a level in excess of 500 mL/min
(approximately 0.13 gallon per minute [gpm]). Record the stabilized flow rate,
drawdown, and time on the field data sheets.
5) If the drawdown does not stabilize at 100 mL/min (0.026 gpm), continue pumping.
However, in general, do not draw down the water level more than approximately
25% of the distance between the static water level and pump intake depth
(American Society for Testing and Materials [ASTM], 2011). If the recharge rate
of the well is lower than the minimum pumping rate, then collect samples at this
point even though indicator field parameters have not stabilized (EPA, July 1996).
Commence sampling as soon as the water level has recovered sufficiently to
collect the required sample volumes. Allow the pump to remain undisturbed in the
well during this recovery period to minimize the turbidity of the water samples.
Fully document the pump settings, pumping rate, drawdown, and field parameter
readings on the Well Sampling / MicroPurge (Low Flow) Log in the field logbook.
Note: For wells that either have very slow recharge rates, that draw down
excessively (more than 25% of the distance between the static water level and
pump intake depth) at the minimum pumping rate (100 mL/min or 0.026 gpm), or
require a higher pumping rate (greater than 500 mL/min or 0.13 gpm) to maintain
purging, the procedures described above may not apply. For these “special case”
wells, the Field Team Leader shall seek guidance from the Project Manager about
the appropriate purging and sampling methodologies to be employed (such as
volume-averaged purging and sampling described in Section 3.3.2).
6) Once an acceptable flow rate has been established, begin monitoring designated
indicator field parameters. Indicator parameters are pH, specific conductance,
dissolved oxygen (DO), and turbidity. Although not considered purge stabilization
parameters, temperature and oxidation reduction potential (ORP) will be
recorded during purging. Base the frequency of the measurements on the time
required to completely evacuate one volume of the flow through the cell to ensure
that independent measurements are made. For example, a 500-mL cell in a
system pumped at a rate of 100 mL/min is evacuated in five minutes; accordingly,
measurements are made and recorded on the field data form (Appendix C)
approximately five minutes apart.
Indicator parameters have stabilized when three consecutive readings, taken
at three to five-minute intervals, meet the following criteria (EPA, March
2013):
• pH ± 0.1 standard unit
• Specific Conductance ± 5% in µS/cm • DO ± 0.2 mg/L or 10% saturation • Turbidity less than 10 NTUs
The target for monitoring turbidity is readings less than ten nephelometric
turbidity units (NTUs). In some instances, turbidity levels may exceed the
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desired turbidity level due to natural aquifer conditions (EPA, April 1996).
When these conditions are encountered, the following guidelines shall be
considered.
• If turbidity readings are slightly above 10 NTU, but trending downward,
purging and monitoring shall continue.
• If turbidity readings are greater than 10 NTU and have stabilized to within
10% during three successive readings, attempt to contact the Project
Manager prior to collecting the groundwater sample.
• If turbidity readings are greater than 10 NTU and are not stable, well sampling
shall be based upon stabilization of more critical indicator parameters (such as
dissolved oxygen) without attainment of the targeted turbidity. Attempt to
contact the Project Manger if this condition is encountered prior to collecting
the groundwater sample.
• If after 5 well volumes or two hours of purging (whichever is achieved first),
critical indicator field parameters have not stabilized, discontinue purging and
collect samples. Fully document efforts used to stabilize the parameters
(such as modified pumping rates).

Note: While every effort should be taken to ensure that indicator parameters
stabilize, some indicator parameters are more critical with respect to certain
contaminant types. It is important to identify which indicator parameters are most
important to the project prior to commencement of field activities so that
unnecessarily protracted purge times can be avoided. For example, the critical
indicator parameter associated with metals is turbidity.
Note: If purging of a well does not result in turbidity measurements of 10 NTU or
less, the field sampler shall alert the Project Manager. The sampling team will
assess options to reduce the turbidity as soon as possible.
There are a variety of water-quality meters available that measure the water
quality parameters identified above. A multi-parameter meter capable of
measuring each of the water quality parameters referenced previously (except for
turbidity) in one flow-through cell is required. Turbidity shall be measured using
a separate turbidity meter or prior to flow into the flow through cell using an
inline T-valve, if using one multi-meter during purging. The water quality meter
(and turbidity meter) shall be calibrated as per manufacturer’s instructions.
Calibration procedures shall be documented in the project field logbook including
calibration solutions used, expiration date(s), lot numbers, and calibration results.

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3.3.2 Volume-Averaging Well Purging

For wells that either have very slow recharge rates, that draw down excessively at the
minimum pumping rate (100 mL/min or 0.026 gpm), or require a higher pumping rate
(greater than 500 mL/min or 0.13 gpm) to maintain purging (i.e., low-flow well purging
and sampling is not appropriate), the volume-averaging well purging and sampling
method may be used. The Field Team Leader shall seek approval from the Project
Manager before utilizing the volume-averaging method instead of the low-flow method.
3.3.2.1 CALCULATE PURGE VOLUMES

Based on the depth-to-water (DTW) and total depth (TD) measurements, the volume
of standing water in the well must be calculated using the following procedures.
1) Subtract DTW from TD to calculate the length of the standing water column (Lwc)
in the well.
ܶܦ െ ܦܹܶ ൌ ܮ௪௖

2) Multiply the length of the standing water column by the volume calculation
(gallon per linear foot of depth) based on the inner casing diameter (see
example list below) to determine the total standing water volume; this represents
one well volume.
ܸ௪ = ܮ௪௖ ൈ2ߨݎଶ

1-inch well = 0.041 gallon per linear foot
2-inch well = 0.163 gallon per linear foot
4-inch well = 0.653 gallon per linear foot
6-inch well = 1.469 gallons per linear foot
8-inch well = 2.611 gallons per linear foot

3) Multiply the well volume calculated in the previous step by three and five to obtain
the approximate respective total purge volume (the target purge volume is
between three and five standing well volumes). For wells with multiple casing
diameters (such as open bedrock holes), calculate the volume for each segment.
Take the sum of the values and multiply by three and five to determine the
minimum and maximum purge volumes, respectively.
4) Fully document the volume calculation in the field logbook or on the Groundwater
Sampling Field Sheets.

3.3.2.2 PURGE THE MONITORING WELL

Determine the appropriate pump to be used for purging—the preferred and most
commonly used methods involve the use of a surface centrifugal or peristaltic pump
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whenever the head difference between the sampling location and the water level is less
than the limit of suction and the volume to be removed is reasonably small. Where the
water level is below the limit of suction or there is a large volume of water to be purged,
use the variable speed electric submersible pump as the pump of choice (EPA, 2013).
In some cases (shallow wells with small purge volumes), purging with a bladder pump
may be appropriate. Once the proper pump has been selected:
1) Set the pump immediately above the top of the well screen or approximately three
to five feet below the top of the water table (EPA, 2013).
2) Lower the pump if the water level drops during purging.
Note: Use new certified-clean disposable tubing for purging and sampling.

Note: Although volume-averaged sampling involves purging a specified volume of
water (such as three to five well volumes) rather than basing purge completion on
the stabilization of water quality indicator parameters, measuring and recording
water-quality indicator parameters during purging provides information that can be
used for assessment and remedial decision-making purposes. Indicator
parameters are pH, specific conductance, DO, and turbidity as described in
Section 3.3.1. Temperature and ORP will also be recorded during purging.

3) During well purging, monitor the discharge rate using a graduated cylinder or
other measuring device, water-quality indicator parameters (if desired), and DTW
as follows:
• Initially, within approximately three minutes of startup,
• Approximately after each well volume is purged, and then
• Before purge completion.

4) Record pump discharge rates (mL/ min or gpm) and pump settings in the field
logbook. Also, record any changes in the pump settings and the time at which
the changes were made.
5) Maintain low pumping rates to avoid overpumping or pumping the well to dryness,
if possible. If necessary, adjust pumping rates, pump set depth, or extend
pumping times to remove the desired volume of water.
6) Upon reaching the desired purge water volume, turn off the purge pump. Do not
allow the water contained in the pump tubing to drain back into the well when the
pump is turned off. Use an inline check valve or similar device, or if using a
peristaltic pump, remove the tubing from the well prior to turning off the pump. It is
preferred to collect samples within two hours of purging, but acceptable for
collection up to 24 hours of purging. Do not collect samples after 24 hours of
purging.

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Note: The removal of three to five well volumes may not be practical in wells
with slow recovery rates. If a well is pumped to near dryness at a rate less than
1.9 L/min (0.5 gpm), the well shall be allowed to completely recover prior to
sampling. If necessary, the two-hour limit may be exceeded to allow for sufficient
recovery, but samples should be collected within 24 hours of purge completion.

3.4 Sampling

3.4.1 Low-Flow Sampling

Following are the procedures for the collection of low-flow groundwater samples.
These procedures apply to sample collection for unfiltered and filtered samples
using a 0.45 micron filter. See Appendix A for use of 0.1 micron filtered samples.
1) Record the final pump settings in the field logbook prior to sample collection.
2) Measure and record the indicator parameter readings prior to sample collection
on both the stabilization form and in the field logbook.
3) Record comments pertinent to the appearance (color, floc, turbid) and obvious
odors (such as sulfur odor or petroleum hydrocarbons odor) associated with the
water.
4) Arrange and label necessary sample bottles and ensure that preservatives are
added, as required. Include a unique sample number, time and date of sampling,
the initials of the sampler, and the requested analysis on the label. Additionally,
provide information pertinent to the preservation materials or chemicals used in
the sample.
5) Collect samples directly from pump tubing prior to the flow-through cell or via the
in-line T-valve used for turbidity measurements (as described Section 3.3.1 (6)
above). Ensure that the sampling tubing remains filled during sampling and
attempt to prevent water from descending back into the well. Minimize turbulence
when filling sample containers, by allowing the liquid to run gently down the inside
of the bottle. Fill the labeled sample bottles in the following order:
• Metals and Radionuclides, • Filtered Metals and Radionuclides, if required, and then • Other water-quality parameters.
6) Seal each sample and place the sample on ice in a cooler to maintain sample
temperature preservation requirements.
7) Note the sample identification and sample collection time in field logbook and on
Chain-of-Custody form.
8) Once sampling is complete, retrieve the sample pump and associated sampling
equipment and decontaminate in accordance with procedures outlined in the
Decontamination of Equipment SOP (Appendix A).
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9) Close and secure the well. Clean up and remove debris left from the sampling
event. Be sure that investigation-derived wastes are properly containerized and
labeled, if applicable.
10) Review sampling records for completeness. Add additional notes as necessary.

3.4.2 Sampling after Volume-Averaging Purge

The procedures described below are for the collection of groundwater samples after a
volume-averaged purge has been conducted. Volume- averaging purge methods are
described in Section 3.3.2.
1) If sampling with a pump, care shall be taken to minimize purge water
descending back into the well through the pump tubing. Minimize turbulence
when filling sample containers by allowing the liquid to run gently down the
inside of the bottle. Fill the labeled sample bottles in the following order:
• Metals and Radionuclides,
• Filtered Metals and Radionuclides, if required, and then
• Other water-quality parameters.
2) If sampling with a bailer, slowly lower a clean, disposable bailer through the
fluid surface. Retrieve the bailer and fill the sample bottles as described
above. Care shall be taken to minimize disturbing the sample during
collection.
3.5 Sample Handling, Packing, and Shipping

Samples shall be marked, labeled, packaged, and shipped in accordance with the sections
outline below.
3.5.1 Handling
The samples will be stored in coolers for transport to the site. Collected samples will be
placed on ice in the sampling coolers for pickup or transport to the laboratory for
analysis.
3.5.2 Sample Labels
All sample containers will be new, laboratory cleaned and certified bottles. The bottles
will be properly labeled for identification and will include the following information:
• Project Site/ID
• Sample identifier (Well ID)
• Name or initials of sampler(s)
• Date and time of collection
• Analysis parameter(s)/method
• Preservative
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3.5.3 Chain-of-Custody Record
Sample transport and handling will be strictly controlled to prevent sample
contamination. Chain-of-Custody control for all samples will consist of the following:
• Sample containers will be securely placed in coolers (iced) and will remain
under the supervision of project personnel until transfer of the samples to the
laboratory for analysis has occurred.
• Upon delivery to the laboratory, the laboratory director or his designee will sign
the Chain-of-Custody control forms and formally receive the samples. The
laboratory will ensure that proper refrigeration of the samples is maintained.
The Chain-of-Custody document contains information which may include:
• Client name
• Client project name
• Client contact
• Client address
• Client phone/fax number
• Sampler(s) name and signature
• Signature of person involved in the chain of possession
• Inclusive dates of possession
• Sample identification
• Sample number
• Date & time of collection
• Matrix
• Type of container and preservative
• Number of containers
• Sample type - grab or composite
• Analysis parameter(s)/ method
• Internal temperature of shipping container upon opening in the laboratory
3.6 Field Quality Control Samples
Field quality control involves the routine collection and analysis of QC blanks to verify that
the sample collection and handling processes have not impaired the quality of the
samples.
• Equipment Blank – The equipment blank is a sample of deionized water, which
is taken to the field and used as rinse water for sampling equipment. The
equipment blank is prepared like the actual samples and returned to the
laboratory for identical analysis. An equipment blank is used to determine if
certain field sampling or cleaning procedures result in cross-contamination of site
samples or if atmospheric contamination has occurred. One equipment blank
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sample will be prepared per day or per 20 groundwater samples, whichever is
more frequent.
Field and laboratory QA/QC also involves the routine collection and analysis of
duplicate field samples. These samples are collected at a minimum rate of
approximately one per 20 groundwater samples per sample event. A field duplicate is a
replicate sample prepared at the sampling locations from equal portions of all sample
aliquots combined to make the sample. Both the field duplicate and the sample are
collected at the same time, in the same container type, preserved in the same way, and
analyzed by the same laboratory as a measure of sampling and analytical precision.
3.7 Field Logbook Documentation

Field logbooks shall be maintained by the Field Team Leader to record daily activities.
The field logbook may include the following information for each well:
• Well identification number
• Well depth
• Static water level depth
• Presence of immiscible layers (yes – no)
• Estimated well yield, if known
• Purge volume and purge pumping rate
• Time well purge began and ended
• Well evacuation procedure and equipment
• Field analysis data
• Climatic conditions including air temperature
• Field observations on sampling event
• Well location
• Name of collector(s)
• Date and time of sample collection
• Sampling procedure
• Sampling equipment
• Types of sample containers used and sample identification numbers
• Preservative used

The Field Team Leader shall review the field logbook entries for completeness and
accuracy. The Field Team Leader is responsible for completion of the required data
collection forms. Example field logs are in Appendix C.
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3.8 Decontamination and Waste Management

Sampling equipment decontamination shall be performed in a manner consistent with
the Decontamination of Equipment SOP (Appendix A). Decontamination procedures
shall be documented in the field logbook. Investigation-derived wastes produced
during sampling or decontamination shall be managed in accordance with State and
Station-specific rules for disposal of wastes.
4.0 REFERENCES

American Society for Testing and Materials (ASTM). Standard Practice for Low-Flow
Purging and Sampling for Wells and Devices Used for Ground-Water Quality
Investigations, D 6771-02. 2011.
Test Methods for Evaluating Solid Waste - Physical/Chemical Methods (SW-846), Third
Edition. U.S. Environmental Protection Agency. Update I, II, IIA, IIB, III, IIIA, IVA and
IVB.
United States Environmental Protection Agency (EPA), Office of Research and
Development, Office of Solid Waste and Emergency Response. Ground Water Issue,
“Low-Flow (Minimal Drawdown Sampling Procedures). Document Number EPA/540/S-
95/504,” April 1996.
U.S. EPA. Region 4, Groundwater Sampling Operating Procedure. Document Number
SESDPROC-301-R3, November 2013.
U.S. EPA. Region I, Low Stress (Low Flow) Purging and Sampling Procedure for the
Collection of Ground Water Samples from Monitoring Wells, Revision 2, July 1996.
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Decontamination of Equipment SOP

A
Decontamination of
Equipment SOP

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1.0 Purpose & Application

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1.0 1.0 Purpose & Application
This procedure describes techniques meant to produce acceptable decontamination of
equipment used in field investigation and sampling activities. Variations from this SOP
should be approved by the Project Manager prior to implementation and a description of
the variance documented in the field logbook.
2.0 Equipment & Materials
• Decontamination water,
• Alconox detergent or equivalent non-phosphate detergent
• Test tube brush or equivalent
• 5-gallon bucket(s)
• Aluminum foil
• Pump
3.0 Procedure
3.1 Decontamination of Non-disposable Sampling Equipment
Decontamination of non-disposable sampling equipment used to collect samples for
chemical analyses will be conducted prior to each sampling as described below. Larger
items may be decontaminated at the decontamination pad. Smaller items may be
decontaminated over 5-gallon buckets. Wastewater will be disposed in accordance with
applicable State and Station-specific requirements.
1. Alconox detergent or equivalent and water will be used to scrub the equipment.
2. Equipment will be first rinsed with water and then rinsed with distilled/deionized
water.
3. Equipment will be air dried on plastic sheeting.
4. After drying, exposed ends of equipment will be wrapped or covered with
aluminum foil for transport and handling.
3.2 Decontamination of Field Instrumentation
Field instrumentation (such as interface probes, water quality meters, etc.) will be
decontaminated between sample locations by rinsing with deionized or distilled water. If
visible contamination still exists on the equipment after the rinse, an Alconox (or
equivalent) detergent scrub will be added and the probe thoroughly rinsed again.
Decontamination of probes and meters will take place in a 5-gallon bucket. The
decontamination water will be handled and disposed in accordance with applicable
State and Station-specific requirements.
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3.3 Decontamination of Groundwater Sampling Equipment
Non-disposable groundwater sampling equipment, including the pump, support cable
and electrical wires in contact with the sample will be thoroughly decontaminated as
described below:
1. As a pre-rinse, the pump will be operated in a deep basin containing 8 to 10
gallons of water. Other equipment will be flushed with water.
2. The pump will be washed by operating it in a deep basin containing phosphate-
free detergent solution, such as Alconox, and other equipment will be flushed
with a fresh detergent solution. Detergent will be used sparingly, as needed.
3. Afterwards, the pump will be rinsed by operating it in a deep basin of water and
other equipment will be flushed with water.
4. The pump will then be disassembled and washed in a deep basin containing
non-phosphate detergent solution. All pump parts will be scrubbed with a test
tube brush or equivalent.
5. Pump parts will be first rinsed with water and then rinsed with distilled/deionized
water.
6. For a bladder pump, the disposable bladder will be replaced with a new one for
each well and the pump reassembled.
7. The decontamination water will be disposed of properly.
3.4 Materials from Decontamination Activities
All wastewater and PPE generated from decontamination activities will be handled and
disposed in accordance with applicable State and Station-specific requirements.

Duke Energy | Low Flow Groundwater Sampling Plar
Sampling Equipment Check List – Table 1

B
Sampling Equipment
Check List – Table 1

Duke Energy | Low Flow Groundwater Sampling Plar
Sampling Equipment Check List – Table 1

Table 1: Suggested Groundwater Sampling Equipment & Material Checklist
Item Description Check
Health & Safety
Nitrile gloves
Hard hat
Steel-toed boots
Hearing protection
Field first-aid kit
Fire Extinguisher
Eyewash
Safety glasses
Respirator and cartridges (if necessary)
Saranex™/Tyvek® suits and booties (if necessary)
Paperwork
Health and Safety Plan
Project work control documents
Well construction data, location map, field data from previous sampling events
Chain-of-custody forms and custody seals
Field logbook
Measuring Equipment
Flow measurement supplies (for example, graduated cylinder and stop watch)
Electronic water-level indicator capable of detecting non-aqueous phase liquid
Sampling Equipment
GPS device
Monitoring well keys
Tools for well access (for example, socket set, wrench, screw driver, T-wrench)
Laboratory-supplied certified-clean bottles, preserved by laboratory (if necessary)
Appropriate trip blanks and high-quality blank water
Sample filtration device and filters
Submersible pump, peristaltic pump, or other appropriate pump
Appropriate sample and air line tubing (Silastic®, Teflon®, Tygon®, or equivalent)
Stainless steel clamps to attach sample lines to pump
Pump controller and power supply
Oil-less air compressor, air line leads, and end fittings (if using bladder pump)
In-line groundwater parameter monitoring device (for example, YSI-556 Multi-
Parameter or Horiba U-52 water quality meter)

Turbidity meter
Bailer
Calibration standards for monitoring devices

Duke Energy | Low Flow Groundwater Sampling Plar
Field Logbook/Data Sheets

C
Field Logbook/Data
Sheets

Duke Energy | Low Flow Groundwater Sampling Plar
Field Logbook/Data Sheets

Groundwater Potentiometric Level Measurement Log

Well Number Time Depth to
Water
(ft)*
Depth to
Bottom
(ft)*
Water
Column
Thickness
(ft)
Reference
Point
Elevation
(ft, MSL)
Potentiometric
Elevation (ft,
MSL)
Remarks

Field Personnel: Checked By:
* - Measurements are referenced from the top of the PVC inner casing (TOC) for each respective monitoring well. TOCs shall be surveyed by a Professional Land Surveyor and referenced to NAVD88.

Duke Energy | Low Flow Groundwater Sampling Plar
Field Logbook/Data Sheets

Well Sampling / MicroPurge Log
Project Name: Sheet: of
Well Number: Date:
Well Diameter:
Top of Casing Elevation (ft, MSL): Pump Intake Depth (ft):
Total Well Depth (ft): Recharge Rate (sec):
Initial Depth to Water (ft): Discharge Rate (sec):
Water Column Thickness (ft): Controller Settings:
Water Column Elevation (ft, MSL): Purging Time Initiated:
1 Well Volume (gal): Purging Time Completed:
3 Well Volumes (gal): Total Gallons Purged:
WELL PURGING RECORD
Time Volume
Purged
(gallons)
Flow Rate
(mL/min)
Depth to
Water (ft)
Temperature
(°C)
pH
(s.u.)
Specific
Conductance
(mS/cm)
Dissolved
Oxygen
(mg/L)
ORP
(mV)
Turbidity
(NTU) Comments

Stabilization
Criteria
Min. 1 Well
Volume + 3°C + 0.1 + 3% + 10% + 10 mV
< 5 NTU or + 10
% if > 5 NTU

GROUNDWATER SAMPLING RECORD
Sample
Number
Collection
Time Parameter Container Preservative

Duke Energy | Low Flow Groundwater Sampling Plar
Field Logbook/Data Sheets

DAILY FIELD REPORT

Project Name:
Field Manager: Field Personnel: Date:
Weather:
Labor Hours Equipment Materials

Field Observations:

Submitted by: Reviewedby: