NC0003468_SW and Receptor Survey Report_FINAL_20140930

DAN RIVER COMBINED CYCLE STATION
ASH BASIN
Drinking Water Supply Well
and Receptor Survey
NPDES Permit NC0003468

September 30, 2014

Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
TABLE OF CONTENTS

ii
Table of Contents
Page
Report Verification ....................................................................................................................... i
Table of Contents ........................................................................................................................ ii
Section 1 - Introduction .............................................................................................................. 1
Section 2 - Background .............................................................................................................. 3
2.1 Plant and Ash Basin Description .................................................................................. 3
2.2 Description of Surrounding Properties .......................................................................... 4
Section 3 – Drinking Water Supply Well and Receptor Survey Activities and Findings ............... 5
3.1 NCDENR Records Review ........................................................................................... 5
3.2 Local/Regional Water Agency Records Review ........................................................... 5
3.3 Rockingham County Records Review .......................................................................... 6
3.4 Public Water Supplier Records Review ........................................................................ 6
3.5 HDR Field Survey ........................................................................................................ 6
3.6 Additional Survey Activities .......................................................................................... 7
3.7 USGS Hydrography Review ......................................................................................... 7
Section 4 - Site Geology and Hydrogeology ............................................................................... 8
4.1 Generalized Site Hydrogeologic Conceptual Model ..................................................... 8
4.2 Site Geology and Hydrogeology ................................................................................... 9
4.3 Groundwater Flow Directions ......................................................................................10
Section 5 - Summary of Findings ..............................................................................................13
Section 6 - References ..............................................................................................................14

Figures
Figure 1 Site Location Map
Figure 2 Site Layout
Figure 3 Drinking Water Supply Well and Receptor Survey Map

Tables
Table 1 Water Supply Well Information

Appendices
Appendix A EDR GeoCheck Report
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 1 - INTRODUCTION

1

Section 1 - Introduction
Duke Energy Carolinas, LLC (Duke Energy), owns and formerly operated the Dan River Steam
Station (DRSS), located on the Dan River in Rockingham County near Eden, North Carolina
(see Figure 1). DRSS began operation in 1949 as a coal-fired generating station and was
retired from service in 2012. Subsequently, the Dan River Combined Cycle Station (DRCCS)
natural gas generating facility was constructed at the Dan River site and began operations in
2012. Historically, coal ash residue from DRSS’s coal combustion process was disposed of in
two ash basins located northeast of the station and adjacent to the Dan River. The discharge
from the ash basin is permitted by the North Carolina Department of Environment and Natural
Resources (NCDENR) Division of Water Resources (DWR) under the National Pollutant
Discharge Elimination System (NPDES) Permit NC0003468.
The Coal Ash Management Act 2014 – General Assembly of North Carolina Senate Bill 729
Ratified Bill (Session 2013) (SB 729) revised North Carolina General Statute 130A-309.209(c)
to require:
No later than October 1, 2014, the owner of a coal residuals surface
impoundment shall conduct a Drinking Water Supply Well Survey that identifies
all drinking water supply wells within one-half mile down-gradient from the
established compliance boundary of the impoundment and submit the Survey to
the Department.
On August 13, 2014, Duke Energy received a Notice of Regulatory Requirements (NORR) for
the 14 Coal Ash Facilities owned by Duke Energy in North Carolina. The NORR states:
No later than October 14th, 2014 as authorized pursuant to 15A NCAC 02L
.0106(g), the DWR is requesting that Duke perform a receptor survey at each of
the subject facilities and submitted to the DWR. The receptor survey is required
by 15A NCAC 02L .0106(g) and shall include identification of all receptors within
a radius of 2,640 feet (one-half mile) from the established compliance boundary
identified in the respective National Pollutant Discharge Elimination System
(NPDES) permits. Receptors shall include, but shall not be limited to, public and
private water supply wells (including irrigation wells and unused or abandoned
wells) and surface water features within one-half mile of the facility compliance
boundary. For those facilities for which Duke has already submitted a receptor
survey, please update your submittals to ensure they meet the requirements
stated in this letter and referenced attachments and submit them with the others.
If they do not meet these requirements, you must modify and resubmit the plans.
The results of the receptor survey shall be presented on a sufficiently scaled
map. The map shall show the coal ash facility location, the facility property
boundary, the waste and compliance boundaries, and all monitoring wells listed
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 1 - INTRODUCTION

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in the respective NPDES permits. Any identified water supply wells shall be
located on the map and shall have the well owner's name and location address
listed on a separate table that can be matched to its location on the map.
HDR has completed this Drinking Water Supply Well and Receptor Survey (Survey) to satisfy
the requirements outlined in SB 729 and the NORR. The scope of this Survey consists of
identification of all receptors within a 0.5-mile radius (2,640 feet) of the Dan River ash basin
compliance boundary based on the requirements set forth in 15A NCAC 02L .0106(g). The
receptors include public and private water supply wells (including irrigation wells and unused or
abandoned wells) and surface water features (see Section 3.6) within a 0.5-mile radius of the
ash basin compliance boundary. HDR also identified public water supplies and wellhead
protection areas (if present) within a 0.5-mile radius of the ash basin compliance boundary. The
compliance boundary for groundwater quality in relation to the ash basin is defined in
accordance with 15A NCAC 02L .0107(a) as being established either 500 feet from the waste
boundary or at the property boundary, whichever is closer to the source. The Survey activities
performed and the findings of those activities are presented in Section 3 and on Figure 3. Table
1 includes the well owner’s name and well location address with an identifier which corresponds
to the water supply well identifier on Figure 3. A potential area of interest with respect to the
Dan River ash basin groundwater flow has been delineated on Figure 3. This area is
considered to be potentially downgradient of the Dan River ash basin, based on available
information.

Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 2 - BACKGROUND

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Section 2 - Background
2.1 Plant and Ash Basin Description
DRSS was a coal-fired generating facility located near the town of Eden in Rockingham County,
North Carolina. The three-unit station began commercial operation in 1949. All three coal-fired
units, along with three oil-fired combustion turbine units, were retired in 2012 and are currently
being decommissioned. Simultaneously, the DRCCS, a 620-megawatt natural gas facility,
began commercial operations on-site on December 10, 2012. The Dan River site is located on
the north bank of the Dan River, and the surrounding area generally consists of undeveloped
and agricultural land, the Dan River, and a small number of residential properties (Figure 1).
The ash basin system is located adjacent to the Dan River and consists of a Primary Cell, a
Secondary Cell, and associated embankments and outlet works, as shown on Figure 2. The
ash basin is impounded by earthen dikes and an earthen/ash divider dike separates the Primary
Cell from the Secondary Cell. The Primary Cell lies at an elevation of approximately 535 feet
and has a surface area of approximately 21.8 acres. The Secondary Cell lies at an elevation of
approximately 527 feet and has a surface area of approximately 12.2 acres. The elevation of
the Dan River adjacent to monitoring well MW -22 is approximately 482 feet.
The original ash basin was constructed in 1956 with an approximate crest elevation of 525 feet.
In 1968 and 1969, the ash storage basin was expanded to cover the area occupied today. At
that time, the dikes were raised to an approximate elevation of 530 feet.
In 1976 and 1977, the intermediate dike was constructed to stage sluicing by subdividing the
basin into a Primary Cell and Secondary Cell. The intermediate dike and new Primary Cell
dikes were vertically expanded through inward dike construction, where the outward dike slope
was maintained and extended upward to the dike crest. Through inward dike construction,
portions of the main dike were constructed over ash. The intermediate dike was also
constructed over ash.
In 1980, newer dikes, referenced as the dredge dikes, were constructed north of the Primary
and Secondary Ponds, creating a dredge pond and two dry storage areas. Ash was dredged to
the southernmost portion of the northern ash fill and free liquids were allowed to gravity dr ain to
the topographically lower dredge pond located between the dry storage areas. Once
dewatered, ash was hauled and placed dry in the two dry storage areas known as Ash Fill 1 and
Ash Fill 2. The placement of ash in the ash storage areas occurred during multiple projects.
The ash basin was operated as an integral part of the site’s wastewater treatment system.
During operation of the coal-fired units, the ash basin received variable inflows from the ash
removal system, station yard drain sump, stormwater flows, and other permitted discharges.
The coal ash was sluiced to the southwest corner of the Primary Cell on a variable basis (i.e.,
dependent on DRSS operations) via sluice pipes.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 2 - BACKGROUND

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Flow is routed from the Primary Cell to the Secondary Cell through a concrete discharge tower.
Effluent from the Secondary Cell is routed to the Dan River via a concrete discharge tower
located in the Secondary Cell. The water surface in both the Primary and Secondary Cells is
controlled by the use of stop logs.
2.2 Description of Surrounding Properties
Properties located within a 0.5-mile radius of the DRCSS ash basin compliance boundary are
located in and southeast of Eden, Rockingham County, North Carolina. The majority of the land
is undeveloped property. Residential properties are located north and northwest of the ash
basin compliance boundary within the 0.5-mile radius. One residence is located south of
DRCCS across the Dan River within the 0.5-mile radius. Two industrial properties are located
northeast of DRCCS; one of these properties has a wastewater treatment plant discharging into
the Dan River. Farm land is located southeast of the station across the Dan River.
Figure 3 depicts these properties surrounding the Dan River site.

Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 3 – DRINKING WATER SUPPLY WELL AND RECEPTOR SURVEY ACTIVITIES AND FINDINGS

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Section 3 – Drinking Water Supply Well and
Receptor Survey Activities and Findings
3.1 NCDENR Records Review
HDR reviewed the NCDENR Department of Environmental Health (DEH) Public Water Supply
Section’s (PWSS) Public Water Supply Water Sources Geographic Information System (GIS)
point data set (pwsws.shp) obtained from the NC OneMap GeoSpatial Portal
(http://data.nconemap.com/geoportal/catalog/main/home.page) to identify public water supply
sources within a 0.5-mile radius of the Dan River ash basin compliance boundary.
On July 8, 2014, HDR reviewed the NCDENR DWR Source Water Assessment Program
(SWAP) online database for public water supply sources to identify any wells located within a
0.5-mile radius of the ash basin compliance boundary, confirm the location of wells included in
the Public Water Supply Water Sources GIS point data set, and identify any wellhead protection
areas located within a 0.5-mile radius of the compliance boundary. The NCDENR SWAP
database provides detailed assessments of all public drinking water intakes and wellhead
protection areas in North Carolina. The website address is:
(http://swap.ncwater.org/website/swap/viewer.htm).
On July 10, 2014, Mr. Justin Schumacher with HDR contacted Mr. Sean McGuire, GIS
Specialist with the NCDENR PWSS, by telephone. Mr. McGuire stated that as of July 10, 2014,
the data contained in the Public Water Supply Water Sources GIS point data set obtained from
the NC OneMap GeoSpatial Portal was current through November 18, 2009. The most current
GIS data set of public water supply locations available from North Carolina state agencies was
available by request since the report update is in process. The GIS point data for the public
water supply wells includes, but is not limited to information such as public water supply (PWS)
system identification numbers, ownership information, PWS source type, well depth, and well
yield. Mr. McGuire indicated the Public Water Supply Water Sources GIS point data set and the
SWAP online database was in the process of being updated.
No public water supply wells were identified in the Public Water Supply Water Sources GIS
point data set or on the NCDENR SWAP online database within a 0.5-mile radius of the Dan
River ash basin compliance boundary.
No wellhead protection areas were identified on the NCDENR SWAP online database within a
0.5-mile radius of the Dan River ash basin compliance boundary.
3.2 Local/Regional Water Agency Records Review
HDR contracted Environmental Data Resources, Inc. (EDR) to conduct a local/regional water
agency records review for water supply wells within a 1-mile radius of the Dan River ash basin.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 3 – DRINKING WATER SUPPLY WELL AND RECEPTOR SURVEY ACTIVITIES AND FINDINGS

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A copy of the EDR Geocheck Report (Inquiry Number 4074638.1s) dated September 22, 2014
is provided in Appendix A.
No wells were identified in within the 0.5-mile radius of the Dan River ash basin compliance
boundary in the EDR report.
3.3 Rockingham County Records Review
On July 8, 2014, Mr. Justin Schumacher with HDR met with Ms. Angel Wyatt, with the
Rockingham County Environmental Health Department to inquire about the location and details
(if available) for registered water supply wells located in Rockingham County within a 0.5-mile
radius of the ash basin compliance boundary.
The Rockingham County Environmental Health Department has no records of private or public
water supply wells located within a 0.5-mile radius of the ash basin compliance boundary. Ms.
Wyatt retrieved record files for the property owners south of the Dan River and within the 0.5-
mile radius of the ash basin compliance boundary but did not find record of water supply well
information. Ms. Wyatt informed Mr. Schumacher that Rockingham County’s records for wells
only date back to 2000 for private and/or public water supply wells.
3.4 Public Water Supplier Records Review
HDR contacted the City of Eden to inquire about municipal water supply to properties located in
their service area within a 0.5-mile radius of the ash basin compliance boundary. On July 7,
2014, Mr. Justin Schumacher with HDR spoke with Mr. Terry Shelton, Director of Environmental
Services, regarding the extent of the municipal water service. Mr. Shelton confirmed that the
City of Eden provides municipal water service to the DRCCS site and properties located north of
the Dan River in Rockingham County within the 0.5-mile radius of the ash basin compliance
boundary.
HDR contacted Dan River Water Inc., a private water utility company, to inquire about municipal
water supply to properties located in their service area of Rockingham County south of the Dan
River and within a 0.5-mile radius of the ash basin compliance boundary. On July 8, 2014, Mr.
Schumacher with HDR spoke with Ms. Linda Carter of Dan River Water Inc. Ms. Carter
confirmed that water service was provided along Town Creek Road south of the Dan River in
Rockingham County.
3.5 HDR Field Survey
HDR personnel performed a field reconnaissance on June 18, 2014 and July 9, 2014, to attempt
to identify public and private water supply wells (including irrigation wells and unused or
abandoned wells) and surface water features located within a 0.5-mile radius of the Dan River
ash basin compliance boundary. A windshield survey was conducted from public roadways to
identify water meters, fire hydrants, valves, and any potential well heads/well houses. Prior to
conducting the field reconnaissance, HDR personnel reviewed orthophotography obtained from
NC OneMap GeoSpatial portal (dated 2010) to identify any potential well heads/well houses and
surface waters within a 0.5-mile radius of the ash basin compliance boundary.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 3 – DRINKING WATER SUPPLY WELL AND RECEPTOR SURVEY ACTIVITIES AND FINDINGS

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In addition, HDR personnel contacted Duke Energy site personnel to identify water supply wells
potentially located on Duke Energy property.
HDR field personnel identified two private water supply wells located outside of Duke Energy’s
property within a 0.5-mile radius of the ash basin compliance boundary during the field
reconnaissance. The wells are included on Figure 3 as “field identified” private water supply
wells. No records of the private water supply wells identified were on file with the Rockingham
County Environmental Health Department. One well is located beside a house along Town
Creek Road south of the Dan River and one well is located on the property to the east of the
DRCCS property boundary near the Dan River. HDR personnel observed the property to the
east of DRCCS and Duke Energy personnel familiar with DRCCS reported that the well has
been potentially abandoned. Duke Energy personnel also reported that no water supply wells
are present on Duke Energy’s property. All drinking water is supplied by the City of Eden for the
DRCCS site.
Water meters, fire hydrants, and valve markings were identified at properties with structures
located in Rockingham County within a 0.5-mile radius of the ash basin compliance boundary
and north of the Dan River.
From the public roadway, HDR personnel did not identify indications of municipal water supply
for the properties located in Rockingham County within a 0.5-mile radius of the ash basin
compliance boundary and south of Dan River. No other wells were identified within a 0.5-mile
radius of the ash basin compliance boundary. No wellhead protection areas were identified
within a 0.5-mile radius of the ash basin compliance boundary.
Several surface water bodies were identified and/or confirmed during HDR’s field
reconnaissance. The surface water bodies located within a 0.5-mile radius of the ash basin
compliance boundary generally flow toward the Dan River.
3.6 Additional Survey Activities
HDR is in the process of mailing water supply well survey questionnaires to property owners
within a 0.5-mile radius of the Dan River ash basin compliance boundary requesting information
on the presence of water supply wells and well usage for the properties. The results of the well
survey questionnaires will be submitted to NCDENR by November 7, 2014.
3.7 USGS Hydrography Review
HDR reviewed the United States Geological Survey (USGS) National Hydrography Dataset
(NHD) obtained from the USGS National Map Viewer (http://viewer.nationalmap.gov/viewer/) to
identify any surface waters features within a 0.5-mile radius of the ash basin compliance
boundary. Hydrography data obtained from the USGS NHD is included on Figure 3.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 4 - SITE GEOLOGY AND HYDROGEOLOGY

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Section 4 - Site Geology and Hydrogeology
4.1 Generalized Site Hydrogeologic Conceptual Model
North Carolina is divided into distinct regions by portions of three physiographic provinces: the
Atlantic Coastal Plain, Piedmont, and Blue Ridge (Fenneman, 1938). The Dan River site is
located within the Piedmont province. The Piedmont is bounded to the east and southeast by
the Atlantic Coastal Plain and to the west by the escarpment of the Blue Ridge Mountains,
covering a distance of 150 to 225 miles (LeGrand, 2004).
The topography of the Piedmont region is characterized by low, rounded hills and long, rolling,
northeast-southwest trending ridges (Heath, 1984). Stream valley to ridge relief in most areas
ranges from 75 to 200 feet. Along the Coastal Plain boundary, the Piedmont region rises from
an elevation of 300 feet msl, to the base of the Blue Ridge Mountains at an elevation of 1,500
feet msl (LeGrand, 2004).
The Piedmont region is underlain by bedrock of Precambrian and Paleozoic age comprised of
igneous and metamorphosed igneous and sedimentary rocks (Heath, 1984). The predominant
rock types are gneisses, schists, and metamorphosed granitic rocks (LeGrand, 2004) with
undeformed, unmetamorphosed plutonic rocks also present throughout the Piedmont. These
formations are oriented with the regional geologic structure in parallel belts trending northeast-
southwest. Throughout the Piedmont, the bedrock is overlain by a variably thick regolith that can
consist of any or all of the following horizons: the residual soil, in-situ, clay-rich weathered rock
referred to as saprolite, and alluvial deposits (Heath, 1984).
The Dan River site is located in the Triassic Dan River Basin located just north of the contact of
the Milton Terrane and the Basin. Locally, the Milton terrane is represented by a Precambrian
metasedimentary unit consisting of metagraywacke and muscovite-biotite schist. The rocks of
the Dan River Basin were deposited within a graben formed between the Piedmont terrane and
the Milton terrane (LeGrand, 1988). Stratigraphy within the basin consists of a lower sequence
of mainly arkosic, coarse-grained sandstone and conglomerate passing upward into siltstone
(Pine Hall Formation), a middle sequence of fossiliferrous sandstone, carbonaceous shale, and
thin coal beds (Cow Branch Formation), and an upper sequence of siltstone, arkosic sandstone,
pebbly sandstone, mudstone, and conglomerate (Stoneville Formation; Carpenter, 1982; Olsen
and others, 1991; Thayer and Robbins, 1992). Alluvial deposits consisting of unconsolidated
sand, silt, and clay with occasional sub-rounded to well-rounded pebbles occur along the Dan
River and major tributaries.
Groundwater occurs within the basin in a system of two interconnected layers: residuum and
weathered rock overlying fractured bedrock. Underlying sandstone layers with the Triassic
sequence likely have some porosity capable of water storage but are generally not used for
water supply. Typically, the residuum is saturated and the water table fluctuates in response to
varying recharge and discharge within it. Lateral movement of groundwater typically occurs in
the weathered rock and fractured bedrock.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 4 - SITE GEOLOGY AND HYDROGEOLOGY

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4.2 Site Geology and Hydrogeology
Based on lithological data obtained from soil borings completed by AMEC Environment &
Infrastructure (AMEC) during ash basin closure assessment activities (AMEC, 2013),
subsurface stratigraphy consists of the following material types: fill, ash, residuum, saprolite,
alluvium, partially weathered rock (PWR), and bedrock. In general, fill, residuum, saprolite and
PWR were encountered on most areas of the site. Ash was encountered within ash ponds and
storage areas, while alluvium was encountered within and adjacent to historical drainage
features and the Dan River. Bedrock was not encountered during AMEC’s activities but is
known to underlie PWR at depth. The general hydrostratigraphic units, in sequence from the
ground surface down to boring termination are defined as follows:
 Fill – Fill material generally consisted of re-worked silts and clays that were borrowed
from one area of the site and re-distributed to other areas. Fill was used in the
construction of dikes and as cover for ash storage areas.
 Ash – Ash was encountered in borings advanced within the ash ponds and ash storage
areas, as well as in some borings advanced through the pond perimeter and
intermediate dikes. Ash several inches thick was encountered in one location within the
ash dredge area located between Ash Fills 1 and 2. Ash was generally described as
gray to dark bluish gray with a silty to sandy texture, consistent with fly ash and bottom
ash.
 Alluvium – Alluvium is unconsolidated soil and sediment that has been eroded and
redeposited by streams and rivers. Alluvium may consist of a variety of materials
ranging from silts and clays to sands and gravels. During site construction and plant
operation, alluvial deposits have been removed or covered. Alluvium was encountered
in borings along the Dan River during the project subsurface exploration activities.
Designations between alluvium and fill are approximate and were challenging to
distinguish due to the similarities in material.
 Residuum – Residuum is the in-place weathered soil that consists of red, brown, yellow,
and gray clayey silt to silty clay. This unit was encountered in various thicknesses
across the site. It is believed that substantial thicknesses of residuum were removed to
practical excavation depths and used for fill. Designations between residuum and fill are
approximate and were challenging to distinguish due to the similarities in material.
 Saprolite – Saprolite is soil developed by in-place weathering of rock similar to the
bedrock that consists of red, brown, yellow, and gray clayey silt to silty clay with traces of
sand and rock fragments. The primary distinction from residuum is that saprolite typically
retains some structure (e.g., mineral banding) from the parent rock. This unit was found
across the site as a generally thin (e.g., less than 5 feet thick) stratigraphic unit. It is
assumed that historical earthwork on-site may have been carried vertically downward
through the residuum to or near the PWR, thus removing much of the saprolite.
 Partially Weathered Rock (PWR) – PWR occurs between the saprolite and bedrock
and contains saprolite and rock remnants. This unit consists of gray to brown sandy silt
and silty sand with sandstone and mudstone rock fragments with relict rock structure. In
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 4 - SITE GEOLOGY AND HYDROGEOLOGY

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general, borings were not advanced more than several feet into PWR. As such, PWR
thickness is not defined beneath the site.
 Bedrock – Bedrock was not encountered during the current exploration activities.
However, based on historical borings and review of published literature, bedrock
beneath the site consists of gray to red to green to brown conglomerate, sandstone and
mudstone of the Dan River Group of Triassic Basin rocks.
4.3 Groundwater Flow Directions
In 2011, Duke Energy provided Altamont Environmental, Inc. (Altamont) information on the
groundwater monitoring wells installed at the ash basin and information on the water levels in
the ash basin. Altamont utilized this information along with consideration of adjacent bodies of
water and site topography to develop generalized groundwater direction flow arrows for the
areas adjacent to the ash basins. This information was presented in the report titled
Generalized Groundwater Flow Direction Maps for Ash Basins, Duke Energy Carolinas, LLC,
Fossil Stations, December 12, 2011. The report contained figures with similar generalized
groundwater flow arrows for all seven of the Duke Energy Carolinas fossil stations. The
information from that report is used with the permission of Duke Energy.
As stated in Section 3.0 of the Altamont report:
The purpose of the Generalized Ash Basin Groundwater Flow Direction Maps,
Figures 1 through 7, is to provide Duke with an interpretation of the generalized
groundwater flow directions in the areas surrounding the ash basins. The maps
were developed utilizing existing data that were readily available and with data
collected as part of on-going monitoring at the ash basins. No additional field
investigation was conducted as part of the development of the maps.
The maps are not intended to provide absolute groundwater flow direction data at
a specific location. Rather, they are an interpretation of the generalized
groundwater flow direction for the shallow water table based on readily available
data.
As described in the following sections (Section 4.0, Section 5.0, and Section 6.0),
there may be hydrogeologic conditions present at the ash basins that cause
groundwater flow conditions to differ from the generalized groundwater flow
directions shown on Figures 1 through 7.
The generalized groundwater flow directions were determined based on a consideration of the
information described above, most notably that the sites are located in the Piedmont
physiographic province. In addition, the generalizations of typical Piedmont hydrogeology found
in A Master Conceptual Model for Hydrogeological Site Characterization in the Piedmont and
Mountain Region of North Carolina (LeGrand 2004) apply to these sites.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 4 - SITE GEOLOGY AND HYDROGEOLOGY

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As stated in Section 5.0 of the Altamont report, the possible effects of pumping from adjacent
water supply wells were not considered in the development of the generalized groundwater flow
direction arrows.
The groundwater elevations used in development of the generalized groundwater direction flow
arrows were from the compliance groundwater monitoring wells (compliance wells) monitored in
association with the NPDES permits and from groundwater monitoring wells voluntarily installed
by Duke Energy (voluntary wells). No routine groundwater elevation data readings were
performed on the voluntary wells after January 2012. The compliance wells were installed in
2010 and 2011.
Section 7.0 of the Altamont report discusses the development of the generalized groundwater
flow direction arrows and the relative level of confidence in the interpretation of the generalized
flow direction as follows:
Groundwater flow direction arrows are used to depict the interpreted direction of
generalized groundwater flow. Three different colors of arrows were used to
indicate the relative level of confidence in the interpretation of the generalized
groundwater flow direction.
The relative level of confidence in the interpretation of flow direction was
determined by:
 The distance from groundwater monitoring wells or surface water elevation
data
 The number of groundwater data elevation points utilized
 Consideration of the surface topography
Descriptions of the relative confidence levels indicated by groundwater flow
direction arrow colors are as follows:
 Black arrows represent high confidence in the groundwater flow direction
interpretation. The black arrows were used in areas in which there were
several known groundwater or surface water elevation data points and the
surface topography supported the interpretation of groundwater flow
characteristic of typical Piedmont groundwater flow.
 Gray arrows represent moderate confidence in the groundwater flow direction
interpretation. The gray arrows were used in areas where at least one
groundwater or surface water elevation point was known or in areas where
there was strong surface topographic data to support the groundwater flow
direction interpretation.
 White arrows represent estimated groundwater flow direction interpretation.
The white arrows were used in areas where there was little or no
groundwater or surface water elevation data and there was not conclusive
surface topographic data to support a gray arrow.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 4 - SITE GEOLOGY AND HYDROGEOLOGY

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Since limited groundwater elevation data readings were performed on the voluntary wells after
January 2012, HDR reviewed the historic groundwater level data available from the compliance
groundwater monitoring wells in conjunction with the current approximate ash basin pond
elevation data.
HDR found the generalized groundwater flow direction arrows presented in the Altamont report
to generally represent the probable direction of groundwater flow for the shallow water table
aquifer based on available data. As stated in the Altamont report, the generalized groundwater
flow direction arrows present an interpretation of flow direction based on data from the shallow
water table aquifer and do not consider the possible effects of pumping from adjacent water
supply wells.
The generalized groundwater flow directions for the area adjacent to the Dan River ash basin
are found on Figure 3.
Based on the site generalized hydrogeological conceptual model by LeGrand, groundwater
levels measured in the site monitoring wells and the generalized groundwater flow direction
arrows, a potential area of interest with respect to the Dan River ash basin groundwater flow
has been delineated on Figure 3. This area is considered to be potentially downgradient of the
Dan River ash basin, based on available information. The Dan River is expected to be the
groundwater discharge region for groundwater flow from the ash basin and is considered to be a
hydrologic boundary for groundwater flow between the ash basin and the properties to the south
of the Dan River. The majority of property within the potential area of interest is owned by Duke
Energy. A small portion of the adjacent property located immediately north and east of the
northern ash storage area has been included within the potential area of interest, based on an
anticipated northerly component of local groundwater flow.
Duke Energy will be installing additional groundwater monitoring wells onsite as part of a Dan
River ash basin comprehensive site assessment. The groundwater flow across the site will be
reviewed after the new groundwater elevation data from these monitoring wells are available.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 5 - SUMMARY OF FINDINGS

13
Section 5 - Summary of Findings
A summary of the receptor Survey findings is provided below. The identified water supply wells
(including irrigation wells and unused or abandoned wells) are shown on Figure 3. Available
property and well information for the identified wells is provided in Table 1.
 Two private water supply wells were identified within a 0.5-mile radius of the ash basin
compliance boundary.
 No public water supply wells were identified within a 0.5-mile radius of the ash basin
compliance boundary.
 Several tributaries of the Dan River were identified within a 0.5-mile radius of the ash
basin.
 No water supply wells (including irrigation wells and unused or abandoned wells) were
identified within the ash basin potential area of interest.
 No wellhead protection areas were identified within a 0.5-mile radius of the ash basin
compliance boundary.
 A report with the results from the water supply well questionnaire mailings will be sent to
NCDENR by November 7, 2014.
Duke Energy Carolinas, LLC | Dan River Combined Cycle Station Ash Basin
Drinking Water Supply Well and Receptor Survey
SECTION 6 - REFERENCES

14
Section 6 - References
Altamont Environmental, Inc. Generalized Groundwater Flow Direction Maps for Ash Basins,
Duke Energy Carolinas, LLC, Fossil Stations, December 12, 2011.
Carpenter, P. A., III, 1982, Geologic map of Region G, North Carolina. North Carolina
Department of Natural Resources and Community Development, Geological Survey
Section. Regional Geology Series 2, scale 1:125,000.
Fenneman, Nevin Melancthon. Physiography of eastern United States. McGraw-Hill. 1938.
Heath, R.C., 1984. Ground-water regions of the United States. U.S. Geological Survey W ater-
Supply Paper 2242, 78p.
LeGrand, H.E. 1988. Region 21, Piedmont and Blue Ridge, p.201-208, in Black, W.,
Rosenhein, J. S., and Seaber, P. R., eds., Hydrogeology: Geological Society of
America, The Geology of North America, v. O-2, Boulder, Colorado, 524p.
LeGrand, Harry, Sr. 2004. A Master Conceptual Model for Hydrogeological Site
Characterization in the Piedmont and Mountain Region of North Carolina, North Carolina
Department of Environment and Natural Resources.
AMEC Environment & Infrastructure, 2013. Interpretation and Analysis Report: Ash Basin
Closure – Conceptual Design for Dan River Station, AMEC Project No. 6226-13-0002.
September 2013.
Olsen, P. E., Froelich, A. J., Daniels, D. L., Smoot, J. P., and Gore, P. J. W. 1991. Rift basins of
early Mesozoic age, p. 142- 170, in Horton, J. W., Jr. and Zullo, V A., eds. The Geology
of the Carolinas. The University of Tennessee Press: Knoxville, 406 pp.
Thayer, P.A. and Robbins, E.I. 1992. Sedimentology of Triassic Dan River Group, North
Carolina and Virginia: University of North Carolina Geologic Guidebook 1, p.189-200.

Figures

Tables
\

Table 1
Public and Private Water Supply Wells
Within 0.5 Mile Radius of Cliffside Ash Basin Compliance Boundary
Duke Energy Carolinas, LLC/Riverbend Steam Station
Well ID
(shown on Figure 3)
Public Water
System Name Well Owner Property Address
(well location)Parcel ID Number Reported
Well Use
Approximate
Distance from
Ash Basin
Compliance
Boundary (ft)
Direction from
Ash Basin
Well
Depth
(ft-bgs)
Well
Casing
Depth
(ft-bgs)
Well
Yield
(gpm)
1 N/A 329 Partners, LLC 880 Town Creek Road
Eden, NC 27288
798916947057
(Rockingham County)Assumed Domestic 2,225 Southeast of Ash
Basin Primary Cell N/A N/A N/A
2 N/A Hopkins, LLC New Street
Eden, NC 27288
709000014426
(Rockingham County)Unknown 50 East of Ash Basin
Secondary Cell N/A N/A N/A
Notes:
1. Well locations are shown on Figure 3.
2. Owner and property address information for water supply wells obtained from Rockingham County's online database.
3. Distances between water supply wells and the ash basin compliance boundary are approximate.
4. N/A indicates not available.
5. (ft-bgs) indicates feet below ground surface.
6. (gpm) indicates gallons per minute.
Field Identified Private Supply Wells
Page 1 of 1

Appendix A
EDR GeoCheck Report
Dan River Combined Cycle Station
900 South Edgewood Road, Eden, NC
Inquiry Number: 4074638.1s
September 22, 2014

FORM-NULL-SPM
tropeR ®kcehCoeG RDE ehT
6 Armstrong Road, 4th floor
Shelton, CT 06484
Toll Free: 800.352.0050
www.edrnet.com
Dan Combined Cycle Station
900 South Edgewood Road
Eden, NC 27288
Inquiry Number: 4074638.1s
September 22, 2014
SECTION PAGE
GEOCHECK ADDENDUM
Physical Setting Source Addendum A-1
Physical Setting Source Summary A-2
Physical Setting Source Map A-8
Physical Setting Source Map Findings A-9
Physical Setting Source Records Searched PSGR-1
TC4074638.1s Page 1
Thank you for your business.
Please contact EDR at 1-800-352-0050
with any questions or comments.
Disclaimer - Copyright and Trademark Notice
This Report contains certain information obtained from a variety of public and other sources reasonably available to Environmental Data
Resources, Inc. It cannot be concluded from this Report that coverage information for the target and surrounding properties does not exist from
other sources. NO WARRANTY EXPRESSED OR IMPLIED, IS MADE WHATSOEVER IN CONNECTION WITH THIS REPORT. ENVIRONMENTAL
DATA RESOURCES, INC. SPECIFICALLY DISCLAIMS THE MAKING OF ANY SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION,
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LIMITED TO A REFUND OF THE AMOUNT PAID FOR THIS REPORT. Purchaser accepts this Report "AS IS". Any analyses, estimates, ratings,
environmental risk levels or risk codes provided in this Report are provided for illustrative purposes only, and are not intended to provide, nor
should they be interpreted as providing any facts regarding, or prediction or forecast of, any environmental risk for any property. Only a Phase I
Environmental Site Assessment performed by an environmental professional can provide information regarding the environmental risk for any
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Copyright 2014 by Environmental Data Resources, Inc. All rights reserved. Reproduction in any media or format, in whole
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trademarks used herein are the property of their respective owners.
TABLE OF CONTENTS
TC4074638.1s Page 1
geologic strata.
of the soil, and nearby wells. Groundwater flow velocity is generally impacted by the nature of the
Groundwater flow direction may be impacted by surface topography, hydrology, hydrogeology, characteristics
2. Groundwater flow velocity.
1. Groundwater flow direction, and
Assessment of the impact of contaminant migration generally has two principal investigative components:
forming an opinion about the impact of potential contaminant migration.
EDR’s GeoCheck Physical Setting Source Addendum is provided to assist the environmental professional in
1997Most Recent Revision:
36079-E6 NORTHEAST EDEN, NC VANorth Map:
1994Most Recent Revision:
36079-D6 SOUTHEAST EDEN, NCTarget Property Map:
USGS TOPOGRAPHIC MAP
536 ft. above sea levelElevation:
4039062.8UTM Y (Meters):
614970.9UTM X (Meters):
Zone 17Universal Tranverse Mercator:
79.7164 - 79˚ 42’ 59.04’’Longitude (West):
36.4918 - 36˚ 29’ 30.48’’Latitude (North):
TARGET PROPERTY COORDINATES
EDEN, NC 27288
900 SOUTH EDGEWOOD ROAD
DAN COMBINED CYCLE STATION
TARGET PROPERTY ADDRESS
®GEOCHECK - PHYSICAL SETTING SOURCE REPORT ®
TC4074638.1s Page 2
should be field verified.
on a relative (not an absolute) basis. Relative elevation information between sites of close proximity
Source: Topography has been determined from the USGS 7.5’ Digital Elevation Model and should be evaluated
SURROUNDING TOPOGRAPHY: ELEVATION PROFILES
Elevation (ft)Elevation (ft)TP
TP
0 1/2 1 Miles✩Target Property Elevation: 536 ft.
North South
West East585589569571561501508527526536552573587567602583610616600592561545541555575575559547536518499482483501489481480477General SEGeneral Topographic Gradient:
TARGET PROPERTY TOPOGRAPHY
should contamination exist on the target property, what downgradient sites might be impacted.
assist the environmental professional in forming an opinion about the impact of nearby contaminated properties or,
Surface topography may be indicative of the direction of surficial groundwater flow. This information can be used to
TOPOGRAPHIC INFORMATION
collected on nearby properties, and regional groundwater flow information (from deep aquifers).
sources of information, such as surface topographic information, hydrologic information, hydrogeologic data
using site-specific well data. If such data is not reasonably ascertainable, it may be necessary to rely on other
Groundwater flow direction for a particular site is best determined by a qualified environmental professional
GROUNDWATER FLOW DIRECTION INFORMATION
®GEOCHECK - PHYSICAL SETTING SOURCE SUMMARY®
TC4074638.1s Page 3
Not Reported
GENERAL DIRECTIONLOCATION
GROUNDWATER FLOWFROM TPMAP ID
hydrogeologically, and the depth to water table.
authorities at select sites and has extracted the date of the report, groundwater flow direction as determined
flow at specific points. EDR has reviewed reports submitted by environmental professionals to regulatory
EDR has developed the AQUIFLOW Information System to provide data on the general direction of groundwater
AQUIFLOW®
Search Radius: 1.000 Mile.
contamination exist on the target property, what downgradient sites might be impacted.
environmental professional in forming an opinion about the impact of nearby contaminated properties or, should
of groundwater flow direction in the immediate area. Such hydrogeologic information can be used to assist the
Hydrogeologic information obtained by installation of wells on a specific site can often be an indicator
HYDROGEOLOGIC INFORMATION
YES - refer to the Overview Map and Detail MapSOUTHEAST EDEN
NATIONAL WETLAND INVENTORY
NWI Electronic
Data CoverageNWI Quad at Target Property
Not ReportedAdditional Panels in search area:
37157C - FEMA DFIRM Flood dataFlood Plain Panel at Target Property:
YES - refer to the Overview Map and Detail MapROCKINGHAM, NC
FEMA FLOOD ZONE
FEMA Flood
Electronic DataTarget Property County
and bodies of water).
Refer to the Physical Setting Source Map following this summary for hydrologic information (major waterways
contamination exist on the target property, what downgradient sites might be impacted.
the environmental professional in forming an opinion about the impact of nearby contaminated properties or, should
Surface water can act as a hydrologic barrier to groundwater flow. Such hydrologic information can be used to assist
HYDROLOGIC INFORMATION
®GEOCHECK - PHYSICAL SETTING SOURCE SUMMARY®
TC4074638.1s Page 4

> 60 inchesDepth to Bedrock Max:
> 60 inchesDepth to Bedrock Min:
HIGH Corrosion Potential - Uncoated Steel:
Hydric Status: Soil does not meet the requirements for a hydric soil.
water table is more than 6 feet.
Well drained. Soils have intermediate water holding capacity. Depth toSoil Drainage Class:
textures.
moderately well and well drained soils with moderately coarse
Class B - Moderate infiltration rates. Deep and moderately deep,Hydrologic Group:
sandy loamSoil Surface Texture:
MAYODAN Soil Component Name:
The following information is based on Soil Conservation Service STATSGO data.
in a landscape. Soil maps for STATSGO are compiled by generalizing more detailed (SSURGO) soil survey maps.
for privately owned lands in the United States. A soil map in a soil survey is a representation of soil patterns
Survey (NCSS) and is responsible for collecting, storing, maintaining and distributing soil survey information
The U.S. Department of Agriculture’s (USDA) Soil Conservation Service (SCS) leads the National Cooperative Soil
DOMINANT SOIL COMPOSITION IN GENERAL AREA OF TARGET PROPERTY
Map, USGS Digital Data Series DDS - 11 (1994).
of the Conterminous U.S. at 1:2,500,000 Scale - a digital representation of the 1974 P.B. King and H.M. Beikman
Geologic Age and Rock Stratigraphic Unit Source: P.G. Schruben, R.E. Arndt and W.J. Bawiec, Geology
ROCK STRATIGRAPHIC UNIT GEOLOGIC AGE IDENTIFICATION
Metamorphic RocksCategory:PaleozoicEra:
PennsylvanianSystem:
Felsic paragneiss and schistSeries:
mm1Code: (decoded above as Era, System & Series)
at which contaminant migration may be occurring.
Geologic information can be used by the environmental professional in forming an opinion about the relative speed
GEOLOGIC INFORMATION IN GENERAL AREA OF TARGET PROPERTY
move more quickly through sandy-gravelly types of soils than silty-clayey types of soils.
characteristics data collected on nearby properties and regional soil information. In general, contaminant plumes
to rely on other sources of information, including geologic age identification, rock stratigraphic unit and soil
using site specific geologic and soil strata data. If such data are not reasonably ascertainable, it may be necessary
Groundwater flow velocity information for a particular site is best determined by a qualified environmental professional
GROUNDWATER FLOW VELOCITY INFORMATION
®GEOCHECK - PHYSICAL SETTING SOURCE SUMMARY®
TC4074638.1s Page 5
loamy sand
weathered bedrock
unweathered bedrockDeeper Soil Types:
silt loam
very channery - silt loam
clay
sandy clay loam
loamShallow Soil Types:
loam
channery - silt loam
clay loam
fine sandy loam
silt loamSurficial Soil Types:
loam
channery - silt loam
clay loam
fine sandy loam
silt loamSoil Surface Textures:
appear within the general area of target property.
Based on Soil Conservation Service STATSGO data, the following additional subordinant soil types may
OTHER SOIL TYPES IN AREA
Min: 0.00
Max: 0.00
Min: 0.00
Max: 0.00Not reportedNot reportedvariable60 inches47 inches 4
Min: 4.50
Max: 5.50
Min: 0.60
Max: 2.00
silt.
more), Elastic
limit 50% or
Clays (liquid
SOILS, Silts and
FINE-GRAINED
Soils.
200), Clayey
passing No.
than 35 pct.
Materials (more
Silt-Clayclay47 inches18 inches 3
Min: 4.50
Max: 6.00
Min: 0.60
Max: 2.00
50%), Lean Clay
limit less than
Clays (liquid
SOILS, Silts and
FINE-GRAINED
Soils.
200), Silty
passing No.
than 35 pct.
Materials (more
Silt-Claysilty clay loam18 inches12 inches 2
Min: 4.50
Max: 6.00
Min: 2.00
Max: 6.00
Silty Sand.
Sands with fines,
SOILS, Sands,
COARSE-GRAINED
and Sand.
Clayey Gravel
200), Silty, or
passing No.
pct. or less
materials (35
Granularsandy loam12 inches 0 inches 1
Soil Layer Information
Boundary Classification
Permeability
Rate (in/hr)
Layer Upper Lower Soil Texture Class AASHTO Group Unified Soil Soil Reaction
(pH)
®GEOCHECK - PHYSICAL SETTING SOURCE SUMMARY®
TC4074638.1s Page 6
VIRGINIA AVENUE BASIC FOREST NC10001972
_________ ___
Name ID
NORTH CAROLINA SIGNIFICANT NATURAL HERITAGE AREAS DATABASE:
Invertebrate NC50019159
Animal NC50005752
Animal NC50004183
_________ ___
Class ID
NORTH CAROLINA NATURAL HERITAGE ELEMENT OCCURRENCES
OTHER STATE DATABASE INFORMATION
No Wells Found
STATE DATABASE WELL INFORMATION
LOCATION
FROM TPWELL IDMAP ID
Note: PWS System location is not always the same as well location.
1/2 - 1 Mile EastNC0279404 1
FEDERAL FRDS PUBLIC WATER SUPPLY SYSTEM INFORMATION
LOCATION
FROM TPWELL IDMAP ID
No Wells Found
FEDERAL USGS WELL INFORMATION
LOCATION
FROM TPWELL IDMAP ID
1.000State Database
1.000Federal FRDS PWS
1.000Federal USGS
WELL SEARCH DISTANCE INFORMATION
SEARCH DISTANCE (miles)DATABASE
opinion about the impact of contaminant migration on nearby drinking water wells.
professional in assessing sources that may impact ground water flow direction, and in forming an
EDR Local/Regional Water Agency records provide water well information to assist the environmental
LOCAL / REGIONAL WATER AGENCY RECORDS
®GEOCHECK - PHYSICAL SETTING SOURCE SUMMARY®
TC4074638.1s Page 7
DAN RIVER (ROCKINGHAM) AQUATIC HABITAT NC10003356
MEBANE BRIDGE SLOPE NC10001976
_________ ___
Name ID
NORTH CAROLINA SIGNIFICANT NATURAL HERITAGE AREAS DATABASE:
GEOCHECK - PHYSICAL SETTING SOURCE SUMMARY
EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.60068064064068064
0 6006406 00600680
6 00
6 4064 0 600600560600600
56 0640
640
640
6 4 0
6 00600
60 0 6005 6 0600 6
006 0 0
6
0060056056
6 0 0600 56
0
0600
5 6 0
5 6 05605 60
5 20600600
4 80520520520
6 0 0
6
0
0 48 0 48 0
4 8 0480
4805206 006006004806406 0 0
60 0
6 405605 6 0560
56
0 5605605 6 0
5 20 640
5 2 05 2 0
5 2 0
5 2 0
5 2 0 525206402
0
6005 2 0
5205 2 0
520
5205205205 6 0
5 6 0
56056056055605 605605605606 0 0
6 0 0
6 0 0600
6 0 0
6006 006 0 0
NC
TC4074638.1s Page 9
Violations information not reported.
00000025Population:UntreatedTreatment Class:
EDENCity Served:
079 42 10Facility Longitude:36 29 30Facility Latitude:
EDEN, NC
RT 3 B 224
HAIRFIELD APTS
System Owner/Responsible PartyAddressee / Facility:
EDEN, NC 27288
RT 3 B 224
HAIRFIELD APTS
System Owner/Responsible PartyAddressee / Facility:
EDEN, NC 27288
HAIRFIELD APTSPWS Name:
Not ReportedDate Deactivated:7706Date Initiated:
NC0279404PWS ID:
1
East
1/2 - 1 Mile
Lower
NC0279404FRDS PWS
Map ID
Direction
Distance
Elevation EDR ID NumberDatabase
®GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS®
TC4074638.1s Page 10
587.71Acres per Polygon:
Not ReportedQuality:
DAN RIVER (ROCKINGHAM) AQUATIC HABITATSite Name:
NC10003356NC_SNHA
18.63Acres per Polygon:
Not ReportedQuality:
MEBANE BRIDGE SLOPESite Name:
NC10001976NC_SNHA
24.96Acres per Polygon:
Not ReportedQuality:
VIRGINIA AVENUE BASIC FORESTSite Name:
NC10001972NC_SNHA
ExtantOccurrence Status:
InvertebrateClassification by Type:
173229GIS ID:
NC50019159NC_NHEO
ExtantOccurrence Status:
AnimalClassification by Type:
93296GIS ID:
NC50005752NC_NHEO
ExtantOccurrence Status:
AnimalClassification by Type:
162410GIS ID:
NC50004183NC_NHEO
Map ID
Direction
Distance EDR ID NumberDatabase
®GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS®
TC4074638.1s Page 11
0%0%100%2.450 pCi/LBasement
Not ReportedNot ReportedNot ReportedNot ReportedLiving Area - 2nd Floor
0%0%100%1.350 pCi/LLiving Area - 1st Floor
% >20 pCi/L% 4-20 pCi/L% <4 pCi/LAverage ActivityArea
Number of sites tested: 2
Federal Area Radon Information for Zip Code: 27288
: Zone 3 indoor average level < 2 pCi/L.
: Zone 2 indoor average level >= 2 pCi/L and <= 4 pCi/L.
Note: Zone 1 indoor average level > 4 pCi/L.
Federal EPA Radon Zone for ROCKINGHAM County: 1
4.60.62.4727
__________________________________
Max pCi/LMin pCi/LAvg pCi/LNum Results
Radon Test Results
State Database: NC Radon
AREA RADON INFORMATION
®GEOCHECK - PHYSICAL SETTING SOURCE MAP FINDINGS
RADON
®
TOPOGRAPHIC INFORMATION
USGS 7.5’ Digital Elevation Model (DEM)
Source: United States Geologic Survey
EDR acquired the USGS 7.5’ Digital Elevation Model in 2002 and updated it in 2006. The 7.5 minute DEM corresponds
to the USGS 1:24,000- and 1:25,000-scale topographic quadrangle maps. The DEM provides elevation data
with consistent elevation units and projection.
HYDROLOGIC INFORMATION
Flood Zone Data: This data, available in select counties across the country, was obtained by EDR in 2003 & 2011 from the Federal
Emergency Management Agency (FEMA). Data depicts 100-year and 500-year flood zones as defined by FEMA.
NWI: National Wetlands Inventory. This data, available in select counties across the country, was obtained by EDR
in 2002, 2005 and 2010 from the U.S. Fish and Wildlife Service.
State Wetlands Data: Wetlands Inventory
Source: Department of Environment & Natural Resources
Telephone: [phone]
HYDROGEOLOGIC INFORMATION
AQUIFLOW Information SystemR
Source: EDR proprietary database of groundwater flow information
EDR has developed the AQUIFLOW Information System (AIS) to provide data on the general direction of groundwater
flow at specific points. EDR has reviewed reports submitted to regulatory authorities at select sites and has
extracted the date of the report, hydrogeologically determined groundwater flow direction and depth to water table
information.
GEOLOGIC INFORMATION
Geologic Age and Rock Stratigraphic Unit
Source: P.G. Schruben, R.E. Arndt and W.J. Bawiec, Geology of the Conterminous U.S. at 1:2,500,000 Scale - A digital
representation of the 1974 P.B. King and H.M. Beikman Map, USGS Digital Data Series DDS - 11 (1994).
STATSGO: State Soil Geographic Database
Source: Department of Agriculture, Natural Resources Conservation Services
The U.S. Department of Agriculture’s (USDA) Natural Resources Conservation Service (NRCS) leads the national
Conservation Soil Survey (NCSS) and is responsible for collecting, storing, maintaining and distributing soil
survey information for privately owned lands in the United States. A soil map in a soil survey is a representation
of soil patterns in a landscape. Soil maps for STATSGO are compiled by generalizing more detailed (SSURGO)
soil survey maps.
SSURGO: Soil Survey Geographic Database
Source: Department of Agriculture, Natural Resources Conservation Services (NRCS)
Telephone: [phone]
SSURGO is the most detailed level of mapping done by the Natural Resources Conservation Services, mapping
scales generally range from 1:12,000 to 1:63,360. Field mapping methods using national standards are used to
construct the soil maps in the Soil Survey Geographic (SSURGO) database. SSURGO digitizing duplicates the
original soil survey maps. This level of mapping is designed for use by landowners, townships and county
natural resource planning and management.
TC4074638.1s Page PSGR-1
PHYSICAL SETTING SOURCE RECORDS SEARCHED
LOCAL / REGIONAL WATER AGENCY RECORDS
FEDERAL WATER WELLS
PWS: Public Water Systems
Source: EPA/Office of Drinking Water
Telephone: [phone]
Public Water System data from the Federal Reporting Data System. A PWS is any water system which provides water to at
least 25 people for at least 60 days annually. PWSs provide water from wells, rivers and other sources.
PWS ENF: Public Water Systems Violation and Enforcement Data
Source: EPA/Office of Drinking Water
Telephone: [phone]
Violation and Enforcement data for Public Water Systems from the Safe Drinking Water Information System (SDWIS) after
August 1995. Prior to August 1995, the data came from the Federal Reporting Data System (FRDS).
USGS Water Wells: USGS National Water Inventory System (NWIS)
This database contains descriptive information on sites where the USGS collects or has collected data on surface
water and/or groundwater. The groundwater data includes information on wells, springs, and other sources of groundwater.
STATE RECORDS
North Carolina Public Water Supply Wells
Source: Department of Environmental Health
Telephone: [phone]
OTHER STATE DATABASE INFORMATION
NC Natural Areas: Significant Natural Heritage Areas
Source: Center for Geographic Information and Analysis
Telephone: [phone]
A polygon converage identifying sites (terrestrial or aquatic that have particular biodiversity significance.
A site’s significance may be due to the presenceof rare species, rare or hight quality natural communities, or
other important ecological features.
NC Game Lands: Wildlife Resources Commission Game Lands
Source: Center for Geographic Information and Analysis
Telephone: [phone]
All publicly owned game lands managed by the North Carolina Wildlife Resources Commission and as listed in Hunting
and Fishing Maps.
NC Natural Heritage Sites: Natural Heritage Element Occurrence Sites
Source: Center for Geographic Information and Analysis
Telephone: [phone]
A point coverage identifying locations of rare and endangered species, occurrences of exemplary or unique natural
ecosystems (terrestrial or aquatic), and special animal habitats (e.g., colonial waterbird nesting sites).
RADON
State Database: NC Radon
Source: Department of Environment & Natural Resources
Telephone: [phone]
Radon Statistical and Non Statiscal Data
Area Radon Information
Source: USGS
Telephone: [phone]
The National Radon Database has been developed by the U.S. Environmental Protection Agency
(USEPA) and is a compilation of the EPA/State Residential Radon Survey and the National Residential Radon Survey.
The study covers the years 1986 - 1992. Where necessary data has been supplemented by information collected at
private sources such as universities and research institutions.
TC4074638.1s Page PSGR-2
PHYSICAL SETTING SOURCE RECORDS SEARCHED
EPA Radon Zones
Source: EPA
Telephone: [phone]
Sections 307 & 309 of IRAA directed EPA to list and identify areas of U.S. with the potential for elevated indoor
radon levels.
OTHER
Airport Landing Facilities: Private and public use landing facilities
Source: Federal Aviation Administration, 800-457-6656
Epicenters: World earthquake epicenters, Richter 5 or greater
Source: Department of Commerce, National Oceanic and Atmospheric Administration
Earthquake Fault Lines: The fault lines displayed on EDR’s Topographic map are digitized quaternary faultlines, prepared
in 1975 by the United State Geological Survey
STREET AND ADDRESS INFORMATION
© 2010 Tele Atlas North America, Inc. All rights reserved. This material is proprietary and the subject of copyright protection
and other intellectual property rights owned by or licensed to Tele Atlas North America, Inc. The use of this material is subject
to the terms of a license agreement. You will be held liable for any unauthorized copying or disclosure of this material.
TC4074638.1s Page PSGR-3
PHYSICAL SETTING SOURCE RECORDS SEARCHED