PRLF594_20240723_RI Summary Report_SUM-A

REMEDIAL INVESTIGATION SUMMARY REPORT
Old Richmond County Landfill
Rockingham, Richmond County, North Carolina
Site ID No. NONCD0000594
State Contract No. 017012
Task Order 594SUM-A

Prepared By: Submitted To:

North Carolina Department of
Environmental Quality
Division of Waste Management
______________________________ Inactive Hazardous Sites Branch
Laura I. de Sosua Superfund Section
Staff Scientist Pre-Regulatory Landfill Unit
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

______________________________
Timothy D. Grant, P.G.
Project Manager
N.C. Professional Geologist #1412

Prepared By:

ATC Associates of North Carolina, P.C.
2725 East Millbrook Road, Suite 121
Raleigh, North Carolina 27604
Phone: [phone]
Fax: [phone]

July 23, 2024
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TABLE OF CONTENTS
Contents
1.0 INTRODUCTION ....................................................................................................... 4
2.0 SENSITIVE ENVIRONMENTS ................................................................................ 5
3.0 GEOPHYSICAL SURVEY ........................................................................................ 5
4.0 SITE GEOLOGY AND HYDROGEOLGY ............................................................. 6
5.0 NATURAL AND ANTHROPOGENIC BACKGROUND ...................................... 6
6.0 WASTE DISPOSAL AREA........................................................................................ 8
7.0 MEDIA CHARACTERIZATION ............................................................................. 8
7.1 Above Ground Vapor Survey ............................................................................... 8
7.2 Waste Characterization......................................................................................... 9
7.2.1 Surface Waste ................................................................................................ 9
7.2.2 Waste Characterization Borings ............................................................... 10
7.2.3 Waste and Soil Analytical Results ............................................................. 10
7.3 Evaluation of Existing Soil Cover for use as the Permanent Cover System 111
7.4 Surface Water/Sediment/Seep Investigation ................................................... 122
7.5 Groundwater Investigation ................................................................................. 13
7.5.1 Temporary Monitoring Well Installation ................................................. 13
7.5.2 Groundwater Sampling ............................................................................ 133
7.5.3 Comparison of Background Concentrations to Groundwater Results 133
7.6 Potable Water Supply Well Sampling ............................................................... 14
7.6.1 Potable Water Supply Well Analytical Results ....................................... 14
7.7 Landfill Gas Probe Installation and Monitoring ............................................ 144
7.7.1 Landfill Gas Survey .................................................................................. 144
7.7.2 Landfill Gas Probe Sampling .................................................................... 15
7.7.3 Landfill Gas Probe Analytical Results ...................................................... 15
8.0 EVALUATION OF PRELIMINARY SOIL REMEDIATION
GOALS (PSRGS) .............................................................................................. 155
9.0 DEQ RISK CALCULATOR RESULTS ............................................................... 155
10.0 SOLE USE STATEMENT AND CERTIFICATION .......................................... 16
11.0 REFERENCES ........................................................................................................ 16

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FIGURES

Figure 1 Site Map
Figure 2 Waste Disposal Area Delineation Borings
Figure 3 Above Ground Vapor Survey
Figure 4 Waste and Soil Boring Exceedances
Figure 5 Soil Cover Thickness
Figure 6 Waste Thickness
Figure 7 Evaluation of Existing Soil Cover
Figure 8 Surface Water/Sediment/Spring Investigation
Figure 9 Groundwater Investigation – Potentiometric Contour Map
Figure 10 Groundwater Investigation - Exceedance Map
Figure 11 Potable Water Supply Well Map
Figure 12 Landfill Gas Probe Results

TABLES

Table 1 Waste Disposal Area Delineation Borings
Table 2 Above Ground Vapor Survey
Table 3 Waste and Soil Characterization Borings
Table 4 Evaluation of Existing Soil Cover
Table 5 Surface Water – Natural Attenuation Parameters
Table 6 Surface Water Investigation
Table 7 Sediment Investigation
Table 8 Well Construction
Table 9 Groundwater Investigation
Table 10 Potable Water Supply Well Sampling
Table 11 Landfill Gas Survey Results
Table 12 Soil Gas Probe Results

APPENDICES

Appendix A Risk Calculator
Appendix B Certification

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ACRONYMS
ATC ATC Associates of North Carolina, P.C.
bgs below ground surface
ft feet
IHSB Inactive Hazardous Sites Branch
NCDEQ North Carolina Department of Environmental Quality
NCDOT North Carolina Department of Transportation
DPH Division of Public Health
DPT Direct Push Technology
DWR Division of Water Resources
IDW Investigative Derived Waste
NURE National Uranium Reconnaissance Evaluation
NWI National Wetland Inventory
PCBs Polychlorinated Biphenyls
PID Photoionization Detector
PIN Parcel Identification Number
PSRG Preliminary Soil Remediation Goal
RI Remedial Investigation
SVOC Semivolatile Organic Compound
TCE Trichloroethylene
TICs Tentatively Identified Compounds
TMW Temporary Monitoring Well
μg/m3 micrograms per cubic meter
Unit Pre-Regulatory Landfill Unit
USDA United States Department of Agriculture
USEPA United States Environmental Protection Agency
USGS United States Geological Survey
VOC Volatile Organic Compound
WDA Waste Disposal Area
WSW Water Supply Well
2B Standard Title 15A NCAC 2B .0200 Surface Water Standard
2L Standard Title 15A NCAC 2L .0202 Groundwater Standard

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1.0 INTRODUCTION
ATC Associates of North Carolina, P.C. (ATC) has prepared this Remedial Investigation (RI)
Summary Report for the Old Richmond County Landfill in Rockingham, Richmond County,
North Carolina (ID No. NONCD0000594). This report provides an executive summary of
remedial investigation activities performed to delineate areas of concern at the subject site to
date. For the purposes of this report, the waste disposal area (WDA) as defined by the results
of the previous delineation phase will be referred to collectively as the "Site." The property
under investigation that the site contains will be referred to as the "subject property."
The site is located in Rockingham, North Carolina to the east of Poppyseed Drive. The waste
disposal area lies entirely within one parcel (Richmond County Parcel Identification Number
[PIN] 746502854954). A topographic and a site map are included as Figure 1, respectively.
ATC performed the field activities at the site between April 2019 and January 2021. All work
was performed at the subject property located at 166 Poppy Seed Drive. The field activities
included the following tasks, itemized by Task Order:
 594DP-1–Waste Disposal Area Delineation.
 594DP-2–Above-Ground Vapor Survey.
 594DP-3–Waste Characterization.
 594DP-4–Groundwater Investigation.
 594DP-5–Landfill Gas Probe Installation and Sampling.
 594DP-6–Soil Cover Investigation.
 594DP-7–Surveying.
 594DP-8– Included site mapping for surface debris and tree coverage, additional waste
and 1,4-dioxane delineation, additional landfill gas probe installation and sampling,
review of background data, and preparation of risk calculators.
 594DP-10 – Additional landfill gas probe sampling, gas probe field screening, and gas
probe abandonment.
 594DP-11 - Remaining gas probe abandonment.
 594FP-3 – Sensitive environment, water supply well, and surface water survey.
 594WS-1 – Water supply well sampling.
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2.0 SENSITIVE ENVIRONMENTS
ATC performed a review of potential sensitive environments within 500 feet of the
approximated waste disposal boundary. The review was initiated after additional soil borings
to further define the waste boundary from the 2012 geophysical investigation delineation
boundary. This allowed for the waste delineation boundary to define the boundary conditions
of the 500-foot radius. The survey was performed in accordance with guidelines provided by
the Inactive Hazardous Sites Branch (IHSB) Guidelines for Addressing Pre-Regulatory
Landfills and Dumps, November 2015.
Wetlands were identified within 500 feet of the approximated waste disposal boundary.
According to the National Wetlands Inventory (NWI) map shows wetlands both northeast and
southeast of the Site as shown on Figure 1. The one to the northeast is identified as freshwater
forested/shrub wetland while the one to the southeast is classified as a riverine wetland. This
is also shown as a perennial stream on the United States Geologic Survey (USGS) topographic
map. A small spring, shown on Figure 1, is located southeast of WDA-A, drains into this
feature. The spring channel is shallow (2-3 inches) and is not well defined, ranging from 1 to
3 feet in width. No other sensitive environments were identified within 500 feet of the waste
disposal boundary.
3.0 GEOPHYSICAL SURVEY
ATC conducted a file review of the 2012 Geophysical Report prepared by Geo Solutions
Ltd. (GeoSolutions, 2012). The 2012 geophysical report was associated with investigations
for the former NCDOT facility, located east of the Old Richmond County Landfill. Findings
from the geophysical survey identified two areas of waste, Area A and Area B. Area A
represents the more significant portion of the existing waste and covers approximately 5.5
acres. Area B has a linear structure less than one acre in size and lies just south of Area A.
Based on the GPR data of the survey, the waste is detected at a minimum depth of 8 feet
below ground surface.

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4.0 SITE GEOLOGY AND HYDROGEOLGY
According to the North Carolina Geologic Map (1985), the site is located within the
Middendorf Formation of the Inner Coastal Plain Physiographic Province. The Cretaceous
Middendorf Formation is comprised commonly of cross-bedded, very coarse- to fine-
grained gray to pale gray feldspathic quartz sands and sandstone with kaolinitic clay and
sandy clay lenses. This formation is fluvial in origin. The United States Department of
Agriculture (USDA) indicates the site is predominantly Walkulla and Candor soils. These
soils are comprised of sand, loamy sand, and sandy clay loam (USDA, 2019).
The Black Creek Aquifer is a regional aquifer that extends through the area of the subject
property. The regional hydrogeological framework of the subject site is consistent with that
of the North Carolina Sandhills. The Sand Hills and consists of gently rolling topography.
The Black Creek confining unit is thinnest in the Sand Hills area; approximately 10 feet
thickness (CLP Services, 2012). Based on data collected from monitoring wells,
groundwater at the site is encountered at depths ranging from approximately 8.83 to 31.39
feet (ft) below ground surface (bgs). Groundwater at the site flows towards the southeast,
towards the wetlands thar lie southeast of the site.
5.0 NATURAL AND ANTHROPOGENIC BACKGROUND
Because of limited space on the site property to obtain background samples without the
influence of the landfill, ATC reviewed the available public records to determine natural
inorganic background levels for the area. The following sources were used for determining
natural background concentrations:
 United States Geological Survey (USGS) National Uranium Reconnaissance
Evaluation (NURE) database for surface water and sediment,
 North Carolina Department of Health and Human Services, Division of Public Health
(DPH) well water data for groundwater in Richmond County,
 Analytical results from TMW-4 (groundwater) and from soil samples collected from
soil borings outside of the waste Disposal Area (WDA),
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 Reports from the assessment at North Carolina Department of Transportation
(NCDOT) Asphalt Site #3/Brown Paving (NONCD0002164).
Background sediment concentrations were obtained from nearby sample locations in the
NURE database. This data indicates that arsenic concentrations in sediment ranged from 1 to
3 mg/kg and iron concentrations ranged from 10,000 to 20,000 mg/kg. For background soil
concentrations, analytical data from the 10 soil borings (SB-11 to SB-15 and SB-17 to SB-21)
advanced outside of the WDA was used. Borings SB-10 and SB-16 were advanced within
the WDA. Arsenic concentrations in these samples ranged from 0.442 milligrams/kilograms
(mg/kg) to 9.21 mg/kg, iron concentrations ranged from 2,030 to 14,600 mg/kg, and total
chromium ranged from 2.75 to 18.5 mg/kg. Thallium was not detected in any of the samples
nor were background concentrations available from public records.
Groundwater data from the remedial investigation conducted at the former NCDOT site
located west of the Site shows arsenic concentrations ranged from non-detect to 900 ug/L;
iron ranged from 74 to 1,250,000 ug/L, and manganese ranged from 4.0 to 313 ug/L. A report
(Report of Findings, CLP Services, P.C., October 2012) does indicate that groundwater flow
from the NCDOT is radial with flow towards the southwest and southeast towards the Site. A
trichloroethylene (TCE) plume is shown extending under Highway 220 which is located west
of the Site. TCE was not detected in the monitoring wells installed between the highway and
the Site and TCE was not detected in any groundwater samples collected from the Site or any
of the water supply wells sampled.
TMW-4 was located upgradient from the WDA and therefore could be considered
representative of background. The following constituents were detected in the well: iron –
141 ug/L, manganese – 51.2 ug/L. The DPH well database Richmond County shows iron
concentrations ranging from 25 to 12,350 ug/L and manganese ranging from 15 to 2,260 ug/L.
The samples from this database were likely collected from various depths and may not
represent the surficial aquifer.
There was no resource available to determine background air concentrations.

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6.0 WASTE DISPOSAL AREA
Fifty-three soil borings were advanced at eighteen locations (B-1 through B-18) at the site
using hollow-stem auger drilling methods to delineate the waste boundary. Borings were
advanced to 10 or 15 feet below ground surface (bgs) or until waste or refusal was
encountered. At locations around the residential structure not accessible to a drill rig, eleven
hand auger borings (HA-1 through HA-11) were advanced to a depth of 6 feet or until waste
or refusal was encountered. If waste was encountered, then another boring or borings were
advanced away from the suspected waste boundary until no waste was encountered.
Conversely, if no waste was found, then the borings were advanced in direction of the waste
boundary until waste was encountered. Drill cuttings were screened for volatile organic
compounds (VOCs) using a photoionization detector (PID). No elevated PID readings were
recorded in any of the delineation borings.
Borings indicate that two separate waste disposal areas are on the site property (PIN
746502854954). Waste Disposal Area A (WDA-A) is the larger of the two and covers an area
of approximately 4.7 acres with a maximum thickness of 6.5 feet and an average thickness of
3.4 feet (approximately 26,000 cubic yards of waste); Waste Disposal Area B (WDA-B)
covers approximately 0.2 acres with a maximum thickness of 10 feet and an average of 5.6
feet (approximately 1,900 cubic yards of waste). Soil and waste descriptions for the
delineation borings are included in Table 1, and waste delineation boring locations are shown
on Figure 2.
7.0 MEDIA CHARACTERIZATION
7.1 Above Ground Vapor Survey
An above-ground vapor survey was conducted across the waste disposal area as identified
during waste disposal boundary delineation, and around the adjacent house. To perform the
survey, ATC used field instruments to measure target landfill gases and other parameters at
38 locations on 100-foot centers. The target parameters included methane, oxygen, carbon
dioxide, hydrogen sulfide, volatile organic compounds (VOCs), temperature, humidity, and
barometric pressure. Each instrument was calibrated per the manufacturer’s specifications and
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bump tests were conducted to ensure proper calibration. No elevated concentrations were
detected with the exception of a small VOC detection (0.2 ppm) at AGV-35. The sample
locations are shown in Figure 3. Field readings are summarized on Table 2.
7.2 Waste Characterization
7.2.1 Surface Waste
A site walkover was conducted to document the volume and type of surface waste, assess
the composition of a berm noted in a previous report, and determine the number of mature
trees to address during the remedy.
One small area of exposed waste, identified as Surface Waste-1 on Figure 1, was noted during
the site walkover. The waste was located in some depressions and consisted of metal scraps
and broken glass. Due to the small volume, it is not likely to be sufficient enough to be
considered for recovery and recycling.
The berm, identified as Berm-1 on Figure 1, was approximately 30 ft x 30 ft and slightly
elevated above the surrounding ground. Hand augers were advanced along the berm and
encountered refusal, likely on some debris, at a depth of one foot. The abandoned cars seen
in Figure 1, in the northeast corner of WDA-A, have been removed as of August 2020.
The site walkover performed in August 2020 also included an assessment of the existing
ground cover of the WDA. The majority of WDA-A is wooded with approximately 1.5 acres
of yard or pasture. There are approximately 250 mature trees in WDA-A. Mature tree is
defined as a tree that is greater than six inches in diameter. WDA-B is approximately 0.2
acres and contains a mix of trees and grass and is located in the front yard. There are
approximately 20 mature trees in this area. The wooded areas can be seen in Figure 1.
As shown in Figure 1, a residential structure is partially located on WDA-B. The structure is
a mobile home which rest on a foundation of cinder blocks and has a wooden porch on both
the north and east sides. The foundation is enclosed by aluminum siding. Behind the house
and to the east, there are two storage sheds that rest directly on the ground and have dirt floors.
There is a third smaller shed constructed of aluminum, at the southeast corner of the house
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that is on a wood floor and foundation. The house is on County water and has a septic field
southeast of the structure.
7.2.2 Waste Characterization Borings
Nine soil borings (SB-1 through SB-21) were advanced within WDA-A and two soil borings
(SB-10 and SB-16) were advanced within WDA-B using solid-stem auger and direct-push
drilling methods to characterize the waste. Once results were received from the initial
delineation, further sampling was conducted to delineate the extent of contamination outside
of the known WDA. Eleven soil borings (SB-11 through SB-15, SB-17 though SB-21) were
advanced using direct push technology. Waste consisted of mainly cloth, glass, metal, plastic,
and various other debris. A summary of the lithologic descriptions is included in Table 1 and
boring locations are shown on Figure 2.
For each of the borings noted above, a photoionization detector (PID) was used to screen the
zone within each sample core. Only the location of the first sample collected in each boring
was based on the PID readings. The PID readings are included in Table 3.
Samples were submitted to a North Carolina certified laboratory for the following analysis:
 Volatile Organic Compounds (VOCs) by EPA Method 8260
 1,4 Dioxane by Method 8260 SIM.
 Semi-volatile organic compounds (SVOCs) by EPA Method 8270
 Inorganic hazardous substances by EPA Method 6020 (antimony, arsenic,
 beryllium, cadmium, chromium, copper, iron, lead, manganese, nickel, selenium,
 silver, thallium, and zinc)
 Mercury by Method 7470/7471
7.2.3 Waste and Soil Analytical Results
2-Butanone was detected in one of the trip blanks that accompanied the second phase of
sampling. It was also detected in one of the laboratory method blanks indicating that it is a
laboratory contaminant. It was also detected in some of the samples, but all concentrations
were below the Residential PSRG. Concentrations of lead, zinc, and toluene were detected in
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one field blank. Acetophenone was detected in both a field blank and equipment blank and
one of the soil samples but at concentrations well below the Residential PSRG.
The following were detected in one or more samples above the Residential Preliminary Soil
Remediation Goal (PSRGs) and natural background levels discussed in Section 2.0:
Parameter Sample ID
Iron SB-3(6-8), SB-3(9-10), SB-6(4.5-5.5), SB-6(5.5-6.5),
SB-16(6-7), SB-16 (9-10), SB-20(7-8). SB-21(5-6), SB-21(7-8)

Hexavalent Chromium SB-1(6-7), SB-1(7-8), SB-2(6.5-8.5), SB-3(6-8), SB-3(9-10),
SB-4(4-5), SB-4(5-8), SB-5(3-4), SB-6(4.5-5.5), SB-7(6-7),
SB-7(7-8)

PAHs SB-2(4.5-5.5), SB-2 (6.5-8.5), SB-4(4-5), SB-5(3-4), SB-5(6-8),
SB-5(8-9)
Waste and soil laboratory analytical results are summarized in Table 3 and exceedances above
background are shown in Figure 4.
Data from these borings and the soil cover borings, discussed in Section 7.2.2, was used to
create the soil cover thickness figure presented in Figure 5 and the waste thickness figure
shown in Figure 6. This figure was also used to determine the volume of waste for each WDA
which is presented below:
 Area A – 26,000 cubic yards
 Area B – 1,900 cubic yards
7.3 Evaluation of Existing Soil Cover for use as the Permanent Cover System
To evaluate the use of the existing cover soils, 25 hand auger borings were advanced across
the WDA. The borings were advanced to a depth of three feet or until waste was encountered.
If the soil cover thickness was greater than two feet, samples were collected at 6 and 18 inches.
Samples were submitted to a North Carolina certified laboratory for the same methods
mentioned in Section 7.2.2, except the following was additionally included:
 Hexavalent Chromium by Method 218.1/7199
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 Ammonia by EPA Method SM 4500.
 Nitrate and Sulfate by EPA Methods 300
 Polychlorinated Biphenyls (PCBs) by Method 8082
Arsenic was detected in all samples, except for SC-3 (1.5), at a concentration above the
Residential PSRG. The concentrations range from 0.595 mg/kg to 3.84 mg/kg, which is
within the range for background discussed in Section 2.0. Thallium was detected in six
samples at concentrations above the Residential PSRG. Background concentrations for
Thallium were not available. The four samples with the highest total chromium concentration
were also analyzed for hexavalent chromium. Hexavalent chromium was detected in one
sample (SC-8 0.5’) at a concentration of 0.547 mg/kg which is above Residential PSRG. The
analytical results are summarized in Table 4 and are shown on Figure 7.
All borings that were advanced within the waste boundary were used to determine soil cover
thickness and are included in Table 1. Soil cover ranged from 12 inches to over 36 inches
and the distribution of the soil cover thickness is shown in Figure 5.
7.4 Surface Water/Sediment/Seep Investigation
Surface water and sediment samples were collected from the two locations shown in Figure
8. To reduce turbidity, surface water samples for metals analysis were initially placed in an
unpreserved container and allowed to settle. Field parameters are provided in Table 5. Field
instruments were calibrated in field each day prior to sample collection. Surface
water/sediment samples were submitted to the laboratory for analyses by the methods outlined
in Section 7.2.2.
Iron was the only constituent detected in concentrations in both surface water samples above
the 2B Standard. The concentration was below the background concentration for iron in the
NURE database. Given the shallow depth of the spring, it is applicable to use the NURE
database as representative of background.
The sediment analytical results were compared to the Inactive Hazardous Sites Branch (IHSB)
Residential PSRG. Arsenic was detected in both samples at a concentration above the
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residential PSRG Standard but below the naturally occurring background concentrations from
the NURE database. Surface water and sediment locations are shown in Figure 8. A summary
of the detected constituents are provided in Tables 6 and 7.
7.5 Groundwater Investigation
7.5.1 Temporary Monitoring Well Installation
Seven temporary monitoring wells (TMW-1 through TMW-7) were installed at the site. Depth
to groundwater ranged from 8 to 31 feet below ground surface and groundwater flow is to the
southeast towards the stream discussed in Section 4.0. Groundwater elevation data and well
construction details are summarized in Table 8. Well locations and the potentiometric contour
map are shown on Figure 9. After sample collection, the wells were properly abandoned by
the North Carolina licensed drilling contractor.
7.5.2 Groundwater Sampling
Groundwater samples were collected from the each of the temporary monitoring wells for
analysis of VOCs plus tentatively identified compounds (TICs), SVOCs plus TICs, metals
including mercury, 1,4-Dioxane, PCBs, ammonia, nitrate, and sulfate. Samples were also
collected for hexavalent chromium analysis but were placed on hold until the total chromium
results were known. Laboratory data is summarized in Table 9 and exceedances above 2L
and/or background concentrations are presented in Figure 10.
7.5.3 Comparison of Background Concentrations to Groundwater Results
Manganese and iron were detected in one or more samples in concentrations above the 2L
Standard. Manganese was detected above the 2L Standard in the background well (TMW-4),
but since this well is located approximately 100 feet upgradient of the WDA, concentrations
in this well are considered background. TMW-1 and TMW-2 concentrations were above the
TMW-4 concentration. Chromium was detected in two wells but at concentrations below the
2L Standard so hexavalent chromium samples were not analyzed.

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7.6 Potable Water Supply Well Sampling
A groundwater sample was collected from the water supply well located at 183 Northside
Drive (WSW-4). The location is shown in Figure 11. The sample was analyzed for the same
methods mentioned in Section 7.3, except the Polychlorinated Biphenyls (PCBs) by Method
8082 was not included in the analysis.
7.6.1 Potable Water Supply Well Analytical Results
ATC has compared the results of the sampling to the United States Environmental Protection
Agency (EPA) Maximum Contaminant Levels (MCLs) and the Title 15A NCAC 2L .0202
Groundwater Standards (2L Standards). The results of the sampling indicated that
concentrations of manganese were detected above the 2L Standard in both the parent and
duplicate samples collected from the 183 Northside Drive well. The concentrations of iron
and sulfate detected in this sample were below the EPA MCL and the 2L Standards. Water
supply well laboratory data is summarized in Table 12.
7.7 Landfill Gas Probe Installation and Monitoring
Eighteen landfill gas probes (GP-1 through GP-18) were installed by a North Carolina
licensed drilling contractor using DPT methods. The locations of gas probes are shown on
Figure 12.
7.7.1 Landfill Gas Survey
A landfill gas survey was conducted on the existing gas probes and the newly installed gas
probe. Methane was not detected during either phase of the investigation. VOC
concentrations ranged from 0.0 to 2.2 ppm. Landfill gas survey data are summarized in Table
11 and are included on Figure 12
ATC attempted to sample gas probes GP-10, GP-15, GP 18, and GP-17 in January 2022,
however these gas probes were either removed by the property owner or damaged. All other
gas probes were property abandoned at the site (14 total).

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7.7.2 Landfill Gas Probe Sampling
ATC collected soil gas samples from the 13 landfill gas probes (GP-1 through GP-4 and GP-
10 through GP-18). The samples were analyzed for VOCs by EPA Method TO-15.
7.7.3 Landfill Gas Probe Analytical Results
Only bromodichloromethane and chloroform were detected in concentrations above the IHSB
Residential Soil Gas Screening Levels (SGSLs) in GP-17 sample. GP-17 is located near the
sheds in the backyard and is well outside of the WDA. Since these constituents are also found
in treated potable water, their presence is likely from use of county water for irrigation. Also,
a small above-ground pool was previously located in the backyard. The former location of
the pool is shown in Figure 12. Other constituents were detected above laboratory detection
limits, but concentrations were below their respective SGSL. Soil gas analytical results are
summarized in Table 12 and are shown in Figure 12.
8.0 EVALUATION OF PRELIMINARY SOIL REMEDIATION GOALS (PSRGS)
Soil and sediment analytical results for this RI summary report were initially compared to
unrestricted-use Preliminary Soil Remediation Goals (PSRGs) established by the North
Carolina Inactive Hazardous Sites Branch (IHSB).
9.0 DEQ RISK CALCULATOR RESULTS
Based on the conceptual site model for this site, ATC concluded there is sufficient data to
evaluate risk to specific exposure pathways identified for the site. ATC has completed a risk
assessment utilizing the NCDEQ’s Risk Calculator. The entire site was designated as
Exposure Unit #1. The risk calculator assessed risks for soil combined pathways for a
resident, non-residential worker, construction worker, recreator, and trespasser, groundwater
use for a resident and non-residential worker, surface water exposure for a recreator or
trespasser, and indoor inhalation for a resident or non-residential worker.
For each pathway, the exposure point concentrations were the maximum concentration for
each detected compound for the most conservative scenario. Furthermore, the indoor
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inhalation pathway was assessed using soil gas data collected at the site. Risk exceedances
were identified for a resident for the soil combined pathway. Risk exceedances were not
identified for the remaining pathways. The risk calculator is included in Appendix A.
10.0 SOLE USE STATEMENT AND CERTIFICATION
The report was prepared solely for the intended use of NCDEQ Pre-Regulatory Landfill Unit
performed in the scope of work for Task Order 594SUM-A. Use of this document for other
purposes is at the sole risk of the user. The certification is included in Appendix B.
11.0 REFERENCES
ATC Associates of North Carolina, P.C. Remedial Investigation-Water Supply Well
Sampling- Letter Report–594WS-1. August 24, 2020.

ATC Associates of North Carolina, P.C. Remedial Investigation-Additional Media
Sampling–594DP-9. November 26, 2021.

ATC Associates of North Carolina, P.C. Letter Report for Task–594DP-10. February 23,
2022.

CLP Services, P.C. (CLP) Report of Findings In Situ Biorememdiation Pilot Testing UIC
Permit No. WI0600032 & Underground Injection Control Permit Application for Full-Scale
Treatment & Corrective Action Plan. NCDOT Priority Site No. 3, Richmond County, North
Carolina, October 2012.

Geo Solutions Limited, Inc. Geophysical Evaluation of a NCDOT site near Rockingham,
North Carolina. September 17, 2012.

North Carolina Geological Survey, 1985, Geologic Map of North Carolina: Raleigh, North
Carolina Department of Natural Resources and Community Development, Geological
Survey Section, scale 1:500,000, in color.

United States Department of Agriculture (USDA), 2019, Web Soil Survey (WSS).

TABLES

TABLE 1
WASTE DISPOSAL AREA DELINEATION BORINGS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
BORING
ID
SOIL COVER
THICKNESS
(FEET BGS)
WASTE
THICKNESS
(FEET)
WASTE TYPE LITHOLOGIC DESCRIPTION
DATE OF
BOREHOLE
ADVANCEMENT
BOREHOLE
DEPTH (FEET
BGS)
LATITUDE LONGITUDE
B-1A ≥10 0 NONE Tan and reddish tan SAND 4/22/2019 10 34.9999117 -79.7750471
B-1B ≥10 0 NONE Organic topsoil, brownish tan, tan, and reddish tan SAND, reddish
tan CLAYEY SAND 4/22/2019 10 34.9999077 -79.7750137
B-1C 2 Refusal Cloth, Glass, Metal, Plastic Organic topsoil, reddish tan SAND, brownish tan CLAYEY SAND 4/22/2019 2 34.9998915 -79.7749340
B-2A ≥10 0 NONE Reddish tan, tan, and tannish brown SAND 4/22/2019 10 34.9995103 -79.7749962
B-2B ≥10 0 NONE Tannish brown and tan SAND, reddish brown CLAYEY SAND 4/22/2019 10 34.9995473 -79.7749452
B-2C 2.5 Refusal Plastic, Glass Reddish tan SAND, reddish tan CLAYEY SAND 4/22/2019 2.5 34.9995745 -79.7749115
B-3A ≥10 0 NONE Reddish brown and tannish brown SAND, reddishtan CLAYEY
SAND 4/22/2019 10 34.9996603 -79.7743691
B-3B 3 Refusal Metal, Aluminum Can, Rubber, Yarn,
Plastic
Brown organic topsoil, tannish brown SAND, reddish tan CLAYEY
SAND 4/22/2019 3 34.9996084 -79.7743536
B-3C ≥15 0 NONE Brown and brownish Tan SILTY SAND, tan SAND, brownish red
CLAYEY SAND 5/9/2019 15 34.9995359 -79.7743277
B-3D 4 8 Metal, Plastic, Glass, Fabric Brown SILTY SAND, reddish brown SAND, red and light brown
CLAYEY SAND 5/9/2019 20 34.9994895 -79.7743043
B-3E ≥15 0 NONE Brown, tannish brown, and reddish brown SILTY SAND, tan SAND 5/15/2019 15 34.9994170 -79.7742411
B-4A ≥10 0 NONE Reddish tan and tan SAND, reddish brown CLAYEY SAND 4/22/2019 10 34.9997949 -79.7737628
B-4B 1.25 Refusal Glass, Rusted Metal, Plastic Brown organic topsoil, tannish brown SAND 4/22/2019 1.25 34.9998358 -79.7737622
B-5A 1.5 Refusal Rubber, Plastic, Tile Tannish brown SAND 4/22/2019 1.5 34.9999711 -79.7732864
B-5B 1 Refusal Plastic, Cloth Tannish brown SAND 4/22/2019 1.5 34.9999097 -79.7732426
B-5C ≥10 0 NONE Tannish brown and tan SAND, reddish tan CLAYEY SAND 4/22/2019 10 34.9998547 -79.7731614
B-6A ≥10 0 NONE Brown organic topsoil, tan and tannish brown SAND 4/22/2019 10 34.9999571 -79.7725490
B-6B 1 Refusal Yarn Reddish tan SAND 4/22/2019 1 35.0000292 -79.7726133
B-7A 1 Refusal Cloth, Yarn Brown organic topsoil, reddish tan SAND 4/22/2019 1 35.0002147 -79.7723644
B-7B ≥10 0 NONE Brown organic topsoil, reddish tan SAND 4/22/2019 10 35.0001731 -79.7722829
B-8A ≥10 0 NONE Brown organic topsoil, reddish brown CLAYEY SAND, reddish
brown SAND, light brown Tan SILTY SAND 4/23/2019 10 35.0005106 -79.7725290
B-8B 5.5 1.5*Insulation, Yarn, Cloth, Tile Brown organic topsoil, reddish brown CLAYEY SAND, reddish
brown and tannish brown SAND 4/23/2019 7 35.0005088 -79.7726271
B-9A ≥10 0 NONE Reddish brown and tannish brown SAND 4/23/2019 10 35.0007788 -79.7727000
B-9B 1 2*Plastic, Glass, Metal, Yarn or
Insulation, Plastic Straws Tannish brown and brown SAND 4/23/2019 3 35.0007193 -79.7727235
B-10A ≥10 0 NONE Brown SAND, reddish brown CLAYEY SAND, pink to reddish
brown CLAYEY SILTY SAND 4/23/2019 10 35.0006027 -79.7731421
B-10B ≥5 0 NONE Brown SAND, tannish brown SAND, reddish brown CLAYEY
SAND 4/23/2019 5 35.0006531 -79.7731241
B-10C 3 1.5*Rusted Metal Brown SAND, reddish brown CLAYEY SAND 4/23/2019 4.5 35.0007207 -79.7731683
B-11A 1.25 Refusal Plastic, Glass, Metal, Insulation Tannish brown SAND 4/23/2019 1.25 35.0005197 -79.7737975
B-11B ≥10 0 NONE Tannish brown and tan SAND, reddish brown CLAYEY SAND 4/23/2019 10 35.0005941 -79.7737628
B-12A 2.5 Refusal Plastic, Rusted Metal, Concrete Dark brown organic topsoil, tannish brown and brown SAND 4/23/2019 2.5 35.0004684 -79.7740105
B-12B ≥10 0 NONE Light brown organic topsoil, tannish brown, tan, and reddish brown
SAND, reddish brown CLAYEY SAND 4/23/2019 10 35.0005392 -79.7740036
B-13A 1.5 Refusal Rubber Tannish brown and brown SAND 4/23/2019 1.5 35.0003231 -79.7745956
B-13B ≥10 0 NONE Tan and tannish brown SAND 4/23/2019 10 35.0003887 -79.7746111
B-14A 1.5 0.5*Plastic, Rusted Metal, Brick, Glass Brown SAND 4/23/2019 2 35.0002359 -79.7748378
B-14B ≥10 0 NONE Brown organic topsoil, tan and tannish brown SAND 4/23/2019 10 35.0002950 -79.7748678
B-15A 2 10 Plastic, Glass, Fabric, Metal, Yarn Brown SILTY SAND, tan and reddish tan SAND, brownish red
CLAYEY SAND 5/9/2019 15 34.9993367 -79.7744977
B-15B ≥15 0 NONE Dark brownand brown SILTY SAND, tan and reddish tan SAND 5/9/2019 15 34.9994761 -79.7745365
B-16A ≥10 0 NONE Brown, tannish brown, reddish brown SILTY SAND 5/13/2019 10 34.9992651 -79.7749610
B-16B 6 10 Plastic, Fabric, Metal, Yarn, Rock
Fragments
Brown, tannish brown, reddish brown SILTY SAND, pinkish brown
SILTY SAND 5/13/2019 20 34.9993370 -79.7747265
B-16C ≥15 0 NONE Brown, tannish brown, reddish brown SILTY SAND, tan SAND 5/13/2019 15 34.9992483 -79.7747123
B-16D ≥10 0 NONE Brown and tannish brown SILTY SAND, tan SAND 5/15/2019 10 34.9995154 -79.7746849
B-17A 4 4 Glass, Metal, Burnt Wood Brown and tanish brown SAND, reddish brown SILTY SAND 7/20/2020 15 34.9994990 -79.7741292
B-17B ≥15 0 NONE Brown, tannish brown, tan SAND, reddish brown SILTY SAND 7/20/2020 15 34.9995129 -79.7740291
B-17C 4 4 Plastic, Glass, Metal Tannish brown SAND, reddish brown SILTY SAND 7/20/2020 15 34.9995745 -79.7740419
B-17D 3 4 Plastic, Metal, Yarn, Cloth Brown SAND 7/20/2020 7 34.9996244 -79.7739648
B-17E 2.5 5.5 Metal, Glass, Plastic, Yarn Brown SAND 7/20/2020 8 34.9996667 -79.7739038
B-17F ≥15 0 NONE Brown and tan SAND 7/20/2020 15 34.9996749 -79.7739807
B-17G ≥15 0 NONE Brown and tan SAND 7/20/2020 15 34.9997724 -79.7738017
B-17H ≥15 0 NONE Brown and tan SAND 7/21/2020 15 34.9996417 -79.7740993
B-17I 4 2*Metal, Glass, Burnt Wood Brown and dark brown SAND 7/21/2020 6 34.9995878 -79.7739506
B-17J ≥15 0 NONE Brown and tan SAND 7/21/2020 15 34.9995412 -79.7739426
B-18A ≥10 0 NONE Brown SAND, reddish brown CLAYEY SAND 7/24/2020 10 35.0008036 -79.7730047
TABLE 1
WASTE DISPOSAL AREA DELINEATION BORINGS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
BORING
ID
SOIL COVER
THICKNESS
(FEET BGS)
WASTE
THICKNESS
(FEET)
WASTE TYPE LITHOLOGIC DESCRIPTION
DATE OF
BOREHOLE
ADVANCEMENT
BOREHOLE
DEPTH (FEET
BGS)
LATITUDE LONGITUDE
B-18B 4 1*Plastic, Metal, Glass Brown SAND, dark brown SILTY SAND 7/24/2020 5 35.0007880 -79.7729987
HA-1 2.5 Refusal Metal, Glass Brown SAND 7/20/2020 2.5 34.9996672 -79.7738665
HA-2 2 0.5*Metal, Glass Brown SAND 7/20/2020 2.5 34.9996373 -79.7738662
HA-3 ≥2.5 0 NONE Brown, tan, and gray SAND, reddish brown CLAYEY SAND, white
and reddish white SANDY SILT 7/20/2020 2.5 34.9996036 -79.7738662
HA-4 ≥6 0 NONE Brown and tan SAND 7/20/2020 6 34.9995619 -79.7738634
HA-5 ≥6 0 NONE Tannish brown and tan SAND 7/20/2020 6 34.9995251 -79.7738937
HA-6 ≥6 0 NONE Brown and tan SAND 7/20/2020 6 34.9994944 -79.7738598
HA-7 1.5 0.5*Glass, Styrofoam, Metal Brown SAND 7/20/2020 2 34.9996899 -79.7738417
HA-8 6 0 NONE Tannish brown and tan SAND 7/20/2020 6 34.9997145 -79.7738010
HA-9 ≥6 0 NONE Brown and tan SAND 7/20/2020 6 34.9997011 -79.7737351
HA-10 ≥6 0 NONE Brown and tan SAND 7/20/2020 6 34.9996344 -79.7737499
HA-11 ≥6 0 NONE Brown and tan SAND 7/20/2020 6 34.9996907 -79.7737923
SB-1 4 4 Plastic, Glass, Metal Brownish and reddish tan SAND, reddish tan, brown, and gray
SILTY SAND 5/6/2019 15 34.9996619 -79.7747945
SB-2 2.5 6.5 Metal, Glass, Plastic, Cloth Brown SAND, Brown and reddish tan CLAYEY SAND 5/6/2019 15 35.0001860 -79.7748127
SB-3 5 5 Metal, Glass, Plastic
Brown and tan SAND, reddish tan, white, and pink CLAYEY
SAND, dark brown and black SILTY SAND, reddish brown
SANDY CLAY
5/6/2019 15 35.0003501 -79.7742016
SB-4 2 6 Metal, Glass, Plastic, Yarn, Cloth,
Rubber
Brown and reddish tan SAND, reddish tan and brown CLAYEY
SAND 5/6/2019 15 34.9998971 -79.7738348
SB-5 3 5 Metal, Plastic, Tile, Rubber Brownish tan and tan SAND, Reddish tan, brown, dark brown
SILTY SAND, white, pink, and tan CLAYEY SAND 5/7/2019 15 35.0001794 -79.7735926
SB-6 2.5 4 Metal, Plastic, Cloth Brown SAND, Reddish tan, brown, and white SILTY SAND, tan,
white, and pink CLAYEY SAND 5/7/2019 15 35.0004915 -79.7734991
SB-7 5 2.5 Metal, Plastic, Cloth, Yarn Brown and reddish tan SAND, grayish brown SILTY SAND 5/7/2019 15 35.0006331 -79.7728195
SB-8 2 3 Aluminum, Plastic, Yarn Brown, reddish tan, and tan SAND, reddish tan and brown SILTY
SAND 5/8/2018 15 35.0001331 -79.7726894
SB-9 1.5 5.5 Metal, Plastic, Fabric, Yarn, Glass Brown, tan, and light brown SAND, reddish tan SILTY SAND 5/8/2019 25 35.0000023 -79.7732490
SB-10 4 4 Burnt paper, Plastic Brown, dark brown, and black SAND 7/21/2020 8 34.9995932 -79.7739564
SB-11 ≥10 0 NONE Brown, reddish brown, and tan SAND 7/22/2020 10 34.9995811 -79.7750917
SB-12 ≥11 0 NONE Brown and tan SAND 7/22/2020 11 34.9999581 -79.7749990
SB-13 ≥11 0 NONE Brown and tan SAND 7/22/2020 11 35.0002501 -79.7749584
SB-14 ≥11 0 NONE Brown and tan SAND 7/22/2020 11 35.0003525 -79.7747540
SB-15 ≥11 0 NONE Brown and tan SAND 7/22/2020 11 35.0006700 -79.7740353
SB-16 5 3 Glass, Plastic, Burnt wood Brown SAND, dark brown and black SILTY SAND, brown
CLAYEY SAND 7/23/2020 10 34.9994227 -79.7744081
SB-17 ≥10 0 NONE Brown and tan SAND 7/23/2020 10 34.9995381 -79.7733536
SB-18 2 3 Glass, Plastic, Burnt wood Brown and tan SAND, dark brown and black SILTY SAND 7/23/2020 10 34.9997145 -79.7737922
SB-19 ≥10 0 NONE Tan SAND, brown CLAYEY SAND 7/23/2020 10 34.9999664 -79.7722003
SB-20 ≥12 0 NONE Brown SAND, reddish brown CLAYEY SAND 7/23/2020 12 35.0005709 -79.7722033
SB-21 ≥12 0 NONE Brown and tan SAND, reddish brown CLAYEY SAND 7/23/2020 12 35.0008169 -79.7730091
Notes
1.) bgs = below ground surface
2.) * - unable to determine total waste thickness due to refusal
PID CO2 O2 H2S Barometric
Pressure Temp Relative
Humidity
(ppm)(%Vol)(%LEL)(%Vol)(%Vol)(ppm)(inches Hg)(°F)(%)
AGV-1 4/25/2019 14:08 0.0 0.0 0 0.0 20.2 0 29.34 81.5 21.3
AGV-2 4/25/2019 14:10 0.0 0.0 0 0.0 20.1 0 ---
AGV-3 4/25/2019 14:13 0.0 0.0 0 0.0 20.1 0 ---
AGV-4 4/25/2019 14:16 0.0 0.0 0 0.0 20.1 0 ---
AGV-5 4/25/2019 14:18 0.0 0.0 0 0.0 20.1 0 ---
AGV-6 4/25/2019 14:20 0.0 0.0 0 0.0 20.1 0 ---
AGV-7 4/25/2019 14:22 0.0 0.0 0 0.0 20.1 0 ---
AGV-8 4/25/2019 14:24 0.0 0.0 0 0.0 20.3 0 ---
AGV-9 4/25/2019 14:25 0.0 0.0 0 0.0 20.2 0 ---
AGV-10 4/25/2019 14:27 0.0 0.0 0 0.0 20.4 0 ---
AGV-11 4/25/2019 14:33 0.0 0.0 0 0.0 20.3 0 ---
AGV-12 4/25/2019 14:36 0.0 0.0 0 0.0 20.3 0 ---
AGV-13 4/25/2019 14:38 0.0 0.0 0 0.0 20.4 0 ---
AGV-14 4/25/2019 14:42 0.0 0.0 0 0.0 20.4 0 ---
AGV-15 4/25/2019 14:44 0.0 0.0 0 0.0 20.4 0 ---
AGV-16 4/25/2019 14:47 0.0 0.0 0 0.0 20.5 0 ---
AGV-17 4/25/2019 14:49 0.0 0.0 0 0.0 20.5 0 ---
AGV-18 4/25/2019 14:52 0.0 0.0 0 0.0 20.5 0 ---
AGV-19 4/25/2019 14:54 0.0 0.0 0 0.0 20.4 0 ---
AGV-20 4/25/2019 14:56 0.0 0.0 0 0.0 20.5 0 ---
AGV-21 4/25/2019 15:00 0.0 0.0 0 0.0 20.6 0 ---
AGV-22 4/25/2019 15:02 0.0 0.0 0 0.0 20.6 0 ---
AGV-23 4/25/2019 15:05 0.0 0.0 0 0.0 20.6 0 29.34 73.8 31.6
AGV-24 4/25/2019 15:07 0.0 0.0 0 0.0 20.6 0 ---
AGV-25 4/25/2019 15:10 0.0 0.0 0 0.0 20.6 0 ---
AGV-26 4/25/2019 15:13 0.0 0.0 0 0.0 20.7 0 ---
AGV-27 4/25/2019 15:15 0.0 0.0 0 0.0 20.7 0 ---
AGV-28 4/25/2019 15:18 0.0 0.0 0 0.0 20.7 0 ---
AGV-29 4/25/2019 15:22 0.0 0.0 0 0.0 20.6 0 ---
AGV-30 4/25/2019 15:24 0.0 0.0 0 0.0 20.6 0 ---
AGV-31 4/25/2019 15:27 0.0 0.0 0 0.0 20.5 0 ---
AGV-32 4/25/2019 15:29 0.0 0.0 0 0.0 20.3 0 ---
AGV-33 4/25/2019 15:33 0.0 0.0 0 0.0 20.4 0 ---
AGV-34 4/25/2019 15:36 0.0 0.0 0 0.0 20.5 0 ---
AGV-35 4/25/2019 15:38 0.2 0.0 0 0.0 20.5 0 ---
AGV-36 4/25/2019 15:41 0.0 0.0 0 0.0 20.5 0 ---
AGV-37 4/25/2019 15:45 0.0 0.0 0 0.0 20.6 0 ---
AGV-38 4/25/2019 15:47 0.0 0.0 0 0.0 20.5 0 ---
Notes:
1.) LEL = Lower Explosive Limit. Readings which exceeded the LEL of 5% for Methane are recorded as ">."
2.) Hg = Mercury.
3.) ppm = Parts Per Million.
SAMPLE ID DATE TIME
CH4
Page 1 of 1
Rockingham, Richmond County, North Carolina NONCD0000594
Old Richmond County LF
ABOVE GROUND VAPOR SURVEY
TABLE 2
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID SB-1
(6-7)P
SB-1
(7-8)B
SB-1
(8-9)N
SB-2
(4.5-5.5)P
SB-2
(6.5-8.5)B DUP-1 SB-2
(9.5-10.5)N
SB-3
(6-8)P
SB-3
(9-10)B
SB-3
(10-11)N
SB-4
(4-5)P
SB-4
(5-8)B
SB-4
(8-9)N
Latitude
Longitude
PID Readings 0.5 0.1 0.0 4.7 2.2 2.2 1.2 30.7 16.9 3.5 20.6 35.1 3.9
Sample Date 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/07/19 05/07/19 05/07/19
Antimony 6.3 0.262 J 0.245 J 0.201 J 0.959 0.399 J 0.709 BDL 0.395 J 0.202 J BDL 0.971 2.12 BDL
Arsenic 0.68 1.38 1.64 2.00 2.79 2.17 2.37 1.48 4.55 4.59 3.63 1.50 1.34 1.30
Beryllium 31 0.241 J 0.237 J 0.127 J 0.207 J 0.172 J 0.187 J 0.154 J 0.171 J 0.164 J 0.146 J 0.0933 J 0.0798 J BDL
Cadmium 14 0.177 J 0.273 J 0.0881 J 0.607 0.245 J 0.265 J BDL 0.153 J BDL BDL 0.205 J 0.862 BDL
Total Chromium 23,000 12.2 18.0 8.13 11.1 8.78 9.21 5.60 21.2 22.5 12.9 5.66 6.61 3.56
Copper 630 10.6 8.19 6.14 25.5 8.34 8.27 3.66 9.70 11.0 3.72 14.9 15.0 1.42
Iron 11,000 5190 5790 7970 14300 8610 9150 5160 15700 16200 8530 9060 6340 2480
Lead 400 42.2 58.4 10.5 42.1 30.5 26.4 4.01 10.1 9.44 4.36 8.76 24.8 1.32
Manganese 380 25.6 20.5 25.2 77.2 36.4 42.9 16.3 21.7 18.0 6.25 31.7 30.8 1.60
Nickel 310 2.72 2.21 2.28 6.32 3.64 3.86 2.23 4.02 3.75 1.72 3.44 3.40 0.477 J
Selenium 78 0.441 J 0.475 J 0.326 J 0.385 J 0.287 J 0.405 J 0.452 J 0.520 J 0.471 J 0.267 J 0.338 J BDL 0.489 J
Silver 78 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Thallium 0.16 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Zinc 4,700 45.4 36.3 24.3 98.0 40.0 56.5 9.72 55.3 56.5 8.16 26.1 105 2.45 J
Mercury by Method 7471 (mg/kg)
Mercury 2.3 0.0247J 0.0244 0.0222 BDL 0.0294 0.0375 0.0279 0.0617 0.0409 0.0248 0.0258 0.0274 0.0136
Hexavalent Chromium by Method 7199 (mg/kg)
Hexavalent Chromium 0.31 0.367J 0.384J BDL BDL 0.403J 0.830J 0.272J 1.02J 0.405J BDL 0.412J 0.543J BDL
Volatile Organic Compounds by Method 8260D (mg/kg)
Acetone 12,000 0.0169J 0.0128J BDL 0.0402J 0.0402J 0.0229J 0.0115J 0.017J 0.098J 0.0146J BDL BDL BDL
Benzene 1.2 BDL BDL BDL 0.013 0.023J 0.007 BDL BDL BDL BDL BDL BDL BDL
Carbon Disulfide 160 BDL BDL BDL 0.063J BDL 0.0268 BDL BDL BDL BDL BDL BDL BDL
Chlorobenzene 58 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,3-Dichlorobenzene NE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,4-Dichlorobenzene 2.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
cis-1,2-Dichloroethylene 31 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Ethylbenzene 6.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Butanone (MEK)5,500 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Hexanone 42 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
4-Methyl-2-pentanone (MIBK)7,000 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Naphthalene 2.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Styrene 1,200 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Tetrachloroethylene 17 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Trichloroethylene 0.87 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Toluene 990 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Xylenes (total)120 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,2,3-Trimethylbenzene 70 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
35.000186 35.0003501
Metals by Method 6020B (mg/kg)
-79.7747945 -79.7748127 -79.7742016 -79.7738348
Residential Health Based
PSRG (mg/kg)
34.9996619 34.9998971
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID SB-1
(6-7)P
SB-1
(7-8)B
SB-1
(8-9)N
SB-2
(4.5-5.5)P
SB-2
(6.5-8.5)B DUP-1 SB-2
(9.5-10.5)N
SB-3
(6-8)P
SB-3
(9-10)B
SB-3
(10-11)N
SB-4
(4-5)P
SB-4
(5-8)B
SB-4
(8-9)N
Latitude
Longitude
PID Readings 0.5 0.1 0.0 4.7 2.2 2.2 1.2 30.7 16.9 3.5 20.6 35.1 3.9
Sample Date 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/06/19 05/07/19 05/07/19 05/07/19
35.000186 35.0003501
-79.7747945 -79.7748127 -79.7742016 -79.7738348
Residential Health Based
PSRG (mg/kg)
34.9996619 34.9998971
Volatile Organic Compounds by Method 8260D-SIM (mg/kg)
1,4-Dioxane 5.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Semi Volatile Organic Compounds by Method 8270E (mg/kg)
Acenaphthene 720 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Acetophenone 1,600 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Acenaphthylene NE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Anthracene 3,600 BDL BDL BDL 1.3J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzo(a)anthracene 1.1 BDL BDL BDL 5.15 BDL 1.85 BDL BDL BDL BDL 1.7J BDL BDL
Benzo(b)fluoranthene 1.1 BDL BDL BDL 7.90 BDL 2.82 BDL BDL BDL BDL BDL BDL BDL
Benzo(g,h,i)perylene NE BDL BDL BDL 4.69 BDL 1.71J BDL BDL BDL BDL BDL BDL BDL
Benzo(a)pyrene 0.11 BDL BDL BDL 5.03 BDL 1.92 BDL BDL BDL BDL BDL BDL BDL
Benzo(k)Fluoranthene 1.1 BDL BDL BDL 2.44J BDL 1.14J BDL BDL BDL BDL 2.13J BDL BDL
Biphenyl NE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Carbazole NE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Caprolactam 6,300 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Chrysene 110 BDL BDL BDL 5.34 BDL 1.94 BDL BDL BDL BDL 1.82J BDL BDL
Dibenz(a,h)Anthracene 11 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Dibenzofuran 15 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Fluoranthene 480 BDL BDL BDL 9.36 BDL 3.21 BDL BDL BDL BDL 2.71J BDL BDL
Fluorene 480 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Indeno(1,2,3-cd)pyrene 1.1 BDL BDL BDL 3.82 BDL 1.48J BDL BDL BDL BDL BDL BDL BDL
2-Methylnaphthalene 48 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Naphthalene 4.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Phenanthrene NE BDL BDL BDL 5.29 BDL 1.78 BDL BDL BDL BDL 0.946J BDL BDL
Bis(2-ethylhexyl)phthalate 450 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Di-n-butyl phthalate 1,300 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Pyrene 360 BDL BDL BDL 7.32 BDL 2.43 BDL BDL BDL BDL 2.06J BDL BDL
2-Methylphenol 630 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
3&4-Methyl Phenol 630 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2,4-Dimethylphenol 250 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Phenol 3,800 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Wet Chemistry by Method 350.1 and 9056A (mg/kg)
Ammonia NE BDL 10.1 10.4 10.1 10.9 9.7 9.7 10.2 10.8 11.0 9.8 10.4 10.7
Nitrate as (N)25,000 BDL 4.3 4.2 4.2 4.3 4.2 4.2 4.4 4.7 4.7 4.3 4.4 4.2
Sulfate NE 73.2 29.1J 37.0J 78.8 63.4 62.3 34.9J 43.9J 52.5J 39.4J 31.0J 30.9J BDL
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Antimony 6.3
Arsenic 0.68
Beryllium 31
Cadmium 14
Total Chromium 23,000
Copper 630
Iron 11,000
Lead 400
Manganese 380
Nickel 310
Selenium 78
Silver 78
Thallium 0.16
Zinc 4,700
Mercury by Method 7471 (mg/kg)
Mercury 2.3
Hexavalent Chromium by Method 7199 (mg/kg)
Hexavalent Chromium 0.31
Volatile Organic Compounds by Method 8260D (mg/kg)
Acetone 12,000
Benzene 1.2
Carbon Disulfide 160
Chlorobenzene 58
1,3-Dichlorobenzene NE
1,4-Dichlorobenzene 2.8
cis-1,2-Dichloroethylene 31
Ethylbenzene 6.1
2-Butanone (MEK)5,500
2-Hexanone 42
4-Methyl-2-pentanone (MIBK)7,000
Naphthalene 2.1
Styrene 1,200
Tetrachloroethylene 17
Trichloroethylene 0.87
Toluene 990
Xylenes (total)120
1,2,3-Trimethylbenzene 70
Metals by Method 6020B (mg/kg)
Residential Health Based
PSRG (mg/kg)
SB-5
(3-4)P DUP-2 SB-5
(6-8)B
SB-5
(8-9)N
SB-6
(4.5-5.5)P
SB-6
(5.5-6.5)B
SB-6
(8.5-10.5)N
SB-7
(6-7)P
SB-7
(7-8)B
SB-7
(11-12)N
SB-8
(2-3)P
SB-8
(4-5)B
SB-8
(8-10)N
SB-9
(3.5-4.5)P
SB-9
(6.5-7.5)B
SB-9
(8.5-10)N
21.1 21.1 8.2 5.3 8 12.1 16.5 4.1 19.2 11.8 42 8.6 9.7 5.7 2.7 2.3
05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/08/19 05/08/19 05/08/19 05/08/19 05/08/19 05/08/19
0.468 J 0.239 J 1.00 0.657 BDL BDL BDL 0.839 0.553 J BDL 0.445J 0.213J BDL 0.52 BDL BDL
3.78 3.52 2.76 2.56 5.32 5.30 2.37 3.50 3.51 4.88 2.76 3.56 1.48 1.64 0.466J 0.542J
0.125 J 0.127 J 0.166 J 0.179 J 0.134 J 0.141 J 0.0806 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL 0.0904 J 0.295 J 0.338 J BDL BDL BDL 0.797 0.565 J BDL BDL BDL BDL 0.398J BDL BDL
15.6 13.2 11.6 11.7 22.8 25.6 17.6 12.3 11.4 14.7 9.18 41.9 5.88 12.3 2.51 1.6
7.11 6.06 11.4 6.58 8.00 7.55 3.90 45.1 27.0 4.97 5.44 2.92 1.88 5.96 1.31 1.15J
12300 11200 9440 8880 16100 17200 6730 11,200 10,300 7,880 6,040 7,200 3,510 6,180 1,020 1,220
7.10 6.27 11.8 15.9 5.22 5.02 2.77 14.0 9.50 2.13 13.60 7.97 2.13 6.12 1.23 1.4
13.3 11.2 15.9 13.6 14.2 10.3 6.87 37.7 30.2 6.02 15.4 11.2 5.25 27.3 2.76 3.06
3.90 2.31 2.75 5.55 3.53 2.94 1.63 3.26 2.80 0.774 1.13 2.81 0.971 3.58 0.39 .506J
0.484 J 0.261 J 0.568 0.425 J 0.294 J 0.222 J BDL 0.523 J 0.353 J 0.880 0.372J 1.21 0.256J 0.353J 0.37 BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
20.1 17.0 28.7 27.9 12.6 7.10 3.04 J 173 125 4.64 J 22 28.8 2.91 248 3.82 6.77
0.0389 0.0358 0.0244 0.0273 0.0442 0.0420 0.0244 0.0532 0.0469 0.0173J 0.0328 0.0204J 0.0109J 0.18 .00767J 0.0134J
0.642J BDL BDL BDL 0.514J BDL BDL 0.574J 0.421J BDL BDL BDL BDL BDL BDL BDL
0.091J BDL BDL BDL 0.0666J 0.0124J 0.0364J BDL BDL 0.022J BDL 0.0136J 0.0136J 0.0501J 0.002J 0.0121J
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL 0.025J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
-79.7735926 -79.7734991 -79.7728195 -79.7726894 -79.773249
35.0001794 35.0004915 35.0006331 35.0001331 35.0000023
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Residential Health Based
PSRG (mg/kg)
Volatile Organic Compounds by Method 8260D-SIM (mg/kg)
1,4-Dioxane 5.4
Semi Volatile Organic Compounds by Method 8270E (mg/kg)
Acenaphthene 720
Acetophenone 1,600
Acenaphthylene NE
Anthracene 3,600
Benzo(a)anthracene 1.1
Benzo(b)fluoranthene 1.1
Benzo(g,h,i)perylene NE
Benzo(a)pyrene 0.11
Benzo(k)Fluoranthene 1.1
Biphenyl NE
Carbazole NE
Caprolactam 6,300
Chrysene 110
Dibenz(a,h)Anthracene 11
Dibenzofuran 15
Fluoranthene 480
Fluorene 480
Indeno(1,2,3-cd)pyrene 1.1
2-Methylnaphthalene 48
Naphthalene 4.1
Phenanthrene NE
Bis(2-ethylhexyl)phthalate 450
Di-n-butyl phthalate 1,300
Pyrene 360
2-Methylphenol 630
3&4-Methyl Phenol 630
2,4-Dimethylphenol 250
Phenol 3,800
Wet Chemistry by Method 350.1 and 9056A (mg/kg)
Ammonia NE
Nitrate as (N)25,000
Sulfate NE
SB-5
(3-4)P DUP-2 SB-5
(6-8)B
SB-5
(8-9)N
SB-6
(4.5-5.5)P
SB-6
(5.5-6.5)B
SB-6
(8.5-10.5)N
SB-7
(6-7)P
SB-7
(7-8)B
SB-7
(11-12)N
SB-8
(2-3)P
SB-8
(4-5)B
SB-8
(8-10)N
SB-9
(3.5-4.5)P
SB-9
(6.5-7.5)B
SB-9
(8.5-10)N
21.1 21.1 8.2 5.3 8 12.1 16.5 4.1 19.2 11.8 42 8.6 9.7 5.7 2.7 2.3
05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/07/19 05/08/19 05/08/19 05/08/19 05/08/19 05/08/19 05/08/19
-79.7735926 -79.7734991 -79.7728195 -79.7726894 -79.773249
35.0001794 35.0004915 35.0006331 35.0001331 35.0000023
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL 0.179J 52.8 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL 1.96J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.3850 BDL 19.9 509J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.8 0.830J 35.9 1.07J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL 46.3 1.34J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.477 BDL 0.791J 0.791J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.731 BDL 37.5 1.05J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
3.57J 0.934J 16.5 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL 23.2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.158J BDL 3.21J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.768 0.8J 34.5 1.12J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL 5.48 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL 2.62J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1.59 1.67J 108 2.52 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.169J BDL 7.58 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.46 BDL 21.7 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL 11.5J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL 9.19J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1.35 1.38J 7.47 1.95 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL 1.26J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1.18 1.32J 74.40 2.11 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
9.7 10.9 11.3 10.6 9.0 11.4 10.1 9.3 9.6 7.2 10.2 10.3 10.4 9.9 8.7 7.40
4.3 4.3 4.4 4.5 4.3 4.6 4.3 4.1 4.2 4.3 4.2 4.2 4.2 4.1 3.9 3.60
46.2J 56 113 133 BDL BDL BDL 71.4 84.4 35.7J 30.3J BDL 44.3J 30.2J BDL BDL
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Antimony 6.3
Arsenic 0.68
Beryllium 31
Cadmium 14
Total Chromium 23,000
Copper 630
Iron 11,000
Lead 400
Manganese 380
Nickel 310
Selenium 78
Silver 78
Thallium 0.16
Zinc 4,700
Mercury by Method 7471 (mg/kg)
Mercury 2.3
Hexavalent Chromium by Method 7199 (mg/kg)
Hexavalent Chromium 0.31
Volatile Organic Compounds by Method 8260D (mg/kg)
Acetone 12,000
Benzene 1.2
Carbon Disulfide 160
Chlorobenzene 58
1,3-Dichlorobenzene NE
1,4-Dichlorobenzene 2.8
cis-1,2-Dichloroethylene 31
Ethylbenzene 6.1
2-Butanone (MEK)5,500
2-Hexanone 42
4-Methyl-2-pentanone (MIBK)7,000
Naphthalene 2.1
Styrene 1,200
Tetrachloroethylene 17
Trichloroethylene 0.87
Toluene 990
Xylenes (total)120
1,2,3-Trimethylbenzene 70
Metals by Method 6020B (mg/kg)
Residential Health Based
PSRG (mg/kg)
SB-10
(5-6)P
SB-11
(6-7)P
SB-11
(7-8)B
SB-11
(8-9)N DUP-B SB-12
(2.5-3.5)P
SB-12
(6.5-8.5)B
SB-12
(9.5-10.5)N
SB-13
(4.5-5.5)P
SB-13
(6.5-8.5)B
SB-13
(9.5-10.5)N
34.99959318
-79.77395642
9.8 0.5 0.5 0.5 36.1 2.6 2.5 3.9 3.6 3.7
07/21/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020
2.90J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1.86 1.88 2.65 2.48 2.42 1.26 3.43 2.22 1.04 1.74 1.09
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
7.97 6.43 10.6 9.32 9.33 4.44J 13.3 9.10 3.87J 5.60 3.79J
12.1 5.41 7.43 6.17 6.86 2.77J 8.31 6.34 2.73J 4.80J 3.07J
7,420 4,240 6,840 6,040 6,170 3,380 9,100 6,530 3,040 4,470 2,970
26.0 2.43 2.37 1.78J 2.18J 2.34 3.24 1.51J 1.43J 1.85J 1.27J
33.9 8.00 10.1 9.19 9.68 10.5 14.7 10.3 17.0 11.9 8.95
3.37 1.54J 2.06J 1.99J 2.15J 1.68J 3.02 2.21J 1.43J 2.09J 1.27J
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
75.6 BDL BDL BDL BDL BDL 10.7J BDL BDL BDL BDL
NA NA NA NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA NA NA NA
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.115 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.00831 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.124BJ 0.0868BJ 0.0888BJ 0.102BJ 0.122BJ 0.101BJ 0.0967BJ 0.104BJ 0.0936BJ 0.0892BJ 0.0931BJ
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.00652J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0191 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0540 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0195 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
34.99995809 35.0002501
-79.77495837-79.77509169 -79.77499903
34.99958108
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Residential Health Based
PSRG (mg/kg)
Volatile Organic Compounds by Method 8260D-SIM (mg/kg)
1,4-Dioxane 5.4
Semi Volatile Organic Compounds by Method 8270E (mg/kg)
Acenaphthene 720
Acetophenone 1,600
Acenaphthylene NE
Anthracene 3,600
Benzo(a)anthracene 1.1
Benzo(b)fluoranthene 1.1
Benzo(g,h,i)perylene NE
Benzo(a)pyrene 0.11
Benzo(k)Fluoranthene 1.1
Biphenyl NE
Carbazole NE
Caprolactam 6,300
Chrysene 110
Dibenz(a,h)Anthracene 11
Dibenzofuran 15
Fluoranthene 480
Fluorene 480
Indeno(1,2,3-cd)pyrene 1.1
2-Methylnaphthalene 48
Naphthalene 4.1
Phenanthrene NE
Bis(2-ethylhexyl)phthalate 450
Di-n-butyl phthalate 1,300
Pyrene 360
2-Methylphenol 630
3&4-Methyl Phenol 630
2,4-Dimethylphenol 250
Phenol 3,800
Wet Chemistry by Method 350.1 and 9056A (mg/kg)
Ammonia NE
Nitrate as (N)25,000
Sulfate NE
SB-10
(5-6)P
SB-11
(6-7)P
SB-11
(7-8)B
SB-11
(8-9)N DUP-B SB-12
(2.5-3.5)P
SB-12
(6.5-8.5)B
SB-12
(9.5-10.5)N
SB-13
(4.5-5.5)P
SB-13
(6.5-8.5)B
SB-13
(9.5-10.5)N
34.99959318
-79.77395642
9.8 0.5 0.5 0.5 36.1 2.6 2.5 3.9 3.6 3.7
07/21/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020
34.99995809 35.0002501
-79.77495837-79.77509169 -79.77499903
34.99958108
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL 0.0333J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL NA NA NA NA NA NA NA NA NA NA
0.699J NA NA NA NA NA NA NA NA NA NA
42.4J NA NA NA NA NA NA NA NA NA NA
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Antimony 6.3
Arsenic 0.68
Beryllium 31
Cadmium 14
Total Chromium 23,000
Copper 630
Iron 11,000
Lead 400
Manganese 380
Nickel 310
Selenium 78
Silver 78
Thallium 0.16
Zinc 4,700
Mercury by Method 7471 (mg/kg)
Mercury 2.3
Hexavalent Chromium by Method 7199 (mg/kg)
Hexavalent Chromium 0.31
Volatile Organic Compounds by Method 8260D (mg/kg)
Acetone 12,000
Benzene 1.2
Carbon Disulfide 160
Chlorobenzene 58
1,3-Dichlorobenzene NE
1,4-Dichlorobenzene 2.8
cis-1,2-Dichloroethylene 31
Ethylbenzene 6.1
2-Butanone (MEK)5,500
2-Hexanone 42
4-Methyl-2-pentanone (MIBK)7,000
Naphthalene 2.1
Styrene 1,200
Tetrachloroethylene 17
Trichloroethylene 0.87
Toluene 990
Xylenes (total)120
1,2,3-Trimethylbenzene 70
Metals by Method 6020B (mg/kg)
Residential Health Based
PSRG (mg/kg)
SB-14
(2.5-3.5)P
SB-14
(6.5-8.5)B
SB-14
(9.5-10.5)N
SB-15
(6-7)P
SB-15
(9-10)B
SB-15
(10-11)N
SB-16
(6-7)P
SB-16
(7-8)B
SB-16
(9-10)N DUP-C SB-17
(3.5-4.5)P
SB-17
(6.5-7.5)B
SB-17
(8.5-10)N
25.7 2.8 3.3 7.8 3.3 3.8 1.7 2.0 1.8 3.8 3.1 3.4
07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 7/23/2020 7/23/2020 7/23/2020
BDL BDL BDL BDL BDL BDL 5.26 BDL BDL 4.71 BDL BDL BDL
1.08 1.39 0.918J 0.884J 2.67 0.572J 3.81 4.75 3.94 3.17 0.882J 0.442J 1.00J
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 2.72 BDL BDL 2.36 BDL BDL BDL
4.43J 5.81 4.07J 4.53J 9.23 2.34J 21.9 14.4 11.9 20.6 3.10J BDL 2.91J
BDL 3.89J BDL 2.95J 6.81 BDL 121 9.86 4.82J 85.8 BDL BDL BDL
3,180 3,710 2,070 2,030 6,990 1,190 39,600 8,520 7,240 44,500 2,640 898 2,070
2.36 1.48J 1.10J 1.71J 4.30 1.27J 154 3.96 3.51 64.7 2.28 BDL 1.33J
11.6 8.05 5.78 7.39 18.1 3.64 304 10.0 9.19 270 8.99 2.72 3.51
1.88J 1.72J BDL BDL 3.95 BDL 36.6 2.31J 1.64J 36.5 1.38J BDL BDL
BDL BDL BDL BDL BDL BDL BDL 3.59 2.74 BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL 12.8J BDL 502 9.28J BDL 387 BDL BDL BDL
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
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.534 0.000865J BDL 0.583 BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.00315J 0.000401J BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.00357J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0372 BDL BDL 0.0107 BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 2.06 0.00239J BDL 0.719 BDL BDL BDL
BDL BDL BDL 0.0746J 0.0820J BDL BDL BDL BDL 0.120J BDL 0.0945J 0.0934J
BDL BDL BDL BDL BDL BDL 0.0287J BDL BDL 0.0140J BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.120 BDL BDL 0.0417 BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.187 BDL BDL 0.0199J BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0147J 0.000443J BDL 0.0103J 0.00107J BDL BDL
BDL BDL BDL BDL BDL BDL 0.0791 BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.00165J BDL BDL 0.048 BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.993 0.00164J BDL 0.471 BDL BDL BDL
0.00101J BDL BDL BDL BDL BDL 0.853 BDL BDL 0.264 BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.129 BDL BDL 0.0549 BDL BDL BDL
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
35.00035249 35.00067002 34.99942272 34.99953812
-79.77440811 -79.77335356-79.77475405 -79.77403529
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Residential Health Based
PSRG (mg/kg)
Volatile Organic Compounds by Method 8260D-SIM (mg/kg)
1,4-Dioxane 5.4
Semi Volatile Organic Compounds by Method 8270E (mg/kg)
Acenaphthene 720
Acetophenone 1,600
Acenaphthylene NE
Anthracene 3,600
Benzo(a)anthracene 1.1
Benzo(b)fluoranthene 1.1
Benzo(g,h,i)perylene NE
Benzo(a)pyrene 0.11
Benzo(k)Fluoranthene 1.1
Biphenyl NE
Carbazole NE
Caprolactam 6,300
Chrysene 110
Dibenz(a,h)Anthracene 11
Dibenzofuran 15
Fluoranthene 480
Fluorene 480
Indeno(1,2,3-cd)pyrene 1.1
2-Methylnaphthalene 48
Naphthalene 4.1
Phenanthrene NE
Bis(2-ethylhexyl)phthalate 450
Di-n-butyl phthalate 1,300
Pyrene 360
2-Methylphenol 630
3&4-Methyl Phenol 630
2,4-Dimethylphenol 250
Phenol 3,800
Wet Chemistry by Method 350.1 and 9056A (mg/kg)
Ammonia NE
Nitrate as (N)25,000
Sulfate NE
SB-14
(2.5-3.5)P
SB-14
(6.5-8.5)B
SB-14
(9.5-10.5)N
SB-15
(6-7)P
SB-15
(9-10)B
SB-15
(10-11)N
SB-16
(6-7)P
SB-16
(7-8)B
SB-16
(9-10)N DUP-C SB-17
(3.5-4.5)P
SB-17
(6.5-7.5)B
SB-17
(8.5-10)N
25.7 2.8 3.3 7.8 3.3 3.8 1.7 2.0 1.8 3.8 3.1 3.4
07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/22/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 7/23/2020 7/23/2020 7/23/2020
35.00035249 35.00067002 34.99942272 34.99953812
-79.77440811 -79.77335356-79.77475405 -79.77403529
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.910 BDL BDL 1.89J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0190J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0282J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0127J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0177J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.118J BDL BDL 0.317J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0400J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0424J BDL BDL 0.0863J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0819J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0433J BDL BDL 0.181J BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.154 BDL BDL 0.477 BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.114 BDL BDL 0.260J BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.269J BDL BDL 3.54J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL 0.0346J BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.151J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.409J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.106J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.08J BDL BDL BDL
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 NA NA NA NA NA NA NA NA NA NA
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Antimony 6.3
Arsenic 0.68
Beryllium 31
Cadmium 14
Total Chromium 23,000
Copper 630
Iron 11,000
Lead 400
Manganese 380
Nickel 310
Selenium 78
Silver 78
Thallium 0.16
Zinc 4,700
Mercury by Method 7471 (mg/kg)
Mercury 2.3
Hexavalent Chromium by Method 7199 (mg/kg)
Hexavalent Chromium 0.31
Volatile Organic Compounds by Method 8260D (mg/kg)
Acetone 12,000
Benzene 1.2
Carbon Disulfide 160
Chlorobenzene 58
1,3-Dichlorobenzene NE
1,4-Dichlorobenzene 2.8
cis-1,2-Dichloroethylene 31
Ethylbenzene 6.1
2-Butanone (MEK)5,500
2-Hexanone 42
4-Methyl-2-pentanone (MIBK)7,000
Naphthalene 2.1
Styrene 1,200
Tetrachloroethylene 17
Trichloroethylene 0.87
Toluene 990
Xylenes (total)120
1,2,3-Trimethylbenzene 70
Metals by Method 6020B (mg/kg)
Residential Health Based
PSRG (mg/kg)
SB-18
(2-3)P
SB-18
(5-6)B
SB-18
(8-9)N DUP-D SB-19
(2-3)P
SB-19
(4-5)B
SB-19
(8-10)N
SB-20
(6-7)P
SB-20
(7-8)B
SB-20
(10-12)N
SB-21
(5-6)P
SB-21
(7-8)B
SB-21
(11-12)N
56.9 8.6 2.7 3.2 2.6 0.7 2.8 1.9 1.6 1,270 191.7 106.9
7/23/2020 7/23/2020 7/23/2020 07/29/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/22/2020
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1.06 1.04 1.31 0.894J 0.944J 0.958J 3.45 3.22 9.21 3.13 6.22 7.70 5.21
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
7.00 7.65 3.54J 2.75J 4.10J 3.39J 8.63 12.8 18.5 10.3 27.0 17.8 10.7
BDL 2.87J BDL BDL 2.84J BDL 4.98J 4.93J 6.10 4.24J 9.76 6.29 4.03J
1,850 1,940 3,090 2,640 2,360 1,990 5,790 7,140 14,600 6,950 16,100 20,500 11,800
BDL 1.57J BDL 1.76J 2.71 1.38J 2.39 3.52 4.41 4.01 7.00 4.86 3.25
6.93 7.37 6.24 9.66 7.16 3.94 8.76 7.61 7.91 7.16 13.3 9.54 4.87
2.43J 3.06 BDL BDL BDL BDL 2.02J 2.08J 2.29J 2.15J 4.33 1.91J BDL
BDL BDL BDL BDL BDL BDL BDL BDL 14.4 BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 16.7J BDL BDL
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
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0576 BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0963J 0.0895J 0.0963J 0.101J BDL 0.0700J BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.00411J BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.00178J BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
-79.7730091-79.77379224 -79.77220029 -79.77220327
35.0008168734.99971451 34.99996645 35.00057092
TABLE 3
WASTE and SOIL CHARACTERIZATION ANALYTICAL RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
SAMPLE ID
Latitude
Longitude
PID Readings
Sample Date
Residential Health Based
PSRG (mg/kg)
Volatile Organic Compounds by Method 8260D-SIM (mg/kg)
1,4-Dioxane 5.4
Semi Volatile Organic Compounds by Method 8270E (mg/kg)
Acenaphthene 720
Acetophenone 1,600
Acenaphthylene NE
Anthracene 3,600
Benzo(a)anthracene 1.1
Benzo(b)fluoranthene 1.1
Benzo(g,h,i)perylene NE
Benzo(a)pyrene 0.11
Benzo(k)Fluoranthene 1.1
Biphenyl NE
Carbazole NE
Caprolactam 6,300
Chrysene 110
Dibenz(a,h)Anthracene 11
Dibenzofuran 15
Fluoranthene 480
Fluorene 480
Indeno(1,2,3-cd)pyrene 1.1
2-Methylnaphthalene 48
Naphthalene 4.1
Phenanthrene NE
Bis(2-ethylhexyl)phthalate 450
Di-n-butyl phthalate 1,300
Pyrene 360
2-Methylphenol 630
3&4-Methyl Phenol 630
2,4-Dimethylphenol 250
Phenol 3,800
Wet Chemistry by Method 350.1 and 9056A (mg/kg)
Ammonia NE
Nitrate as (N)25,000
Sulfate NE
SB-18
(2-3)P
SB-18
(5-6)B
SB-18
(8-9)N DUP-D SB-19
(2-3)P
SB-19
(4-5)B
SB-19
(8-10)N
SB-20
(6-7)P
SB-20
(7-8)B
SB-20
(10-12)N
SB-21
(5-6)P
SB-21
(7-8)B
SB-21
(11-12)N
56.9 8.6 2.7 3.2 2.6 0.7 2.8 1.9 1.6 1,270 191.7 106.9
7/23/2020 7/23/2020 7/23/2020 07/29/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/23/2020 07/22/2020
-79.7730091-79.77379224 -79.77220029 -79.77220327
35.0008168734.99971451 34.99996645 35.00057092
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL 0.00982J BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL 0.00737J BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.246J BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
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 NA NA NA NA NA NA NA NA NA NA
Notes:
1. mg/kg = Milligrams per kilogram.7. NA - Not analyzed
2. (6-7) indicates depth below ground surface. 8. NE - Residential PSRG not established.
3. Rationale for selected sampling interval - P = highest PID reading; 9. North Carolina Department of Environmental Quality Preliminary
B = bottom of waste; N = native soil Soil Remediation Goals (June 2021)
4. BDL = Below Detection Limit 10. PID = Photoionization detector readings in parts per million.
5. B = The same analyte is found in the associated blank.11. BOLD = exceedances of the Residential Health Based PSRGs
6. J = The identificaion of the analyte is acceptable; the reported value standards and background
is an estimate.
PARAMETER
SAMPLE DATE
Method 6020B / Method 7471B
Antimony 6.3 BDL 0.178 J 0.283 J BDL 0.354 J 0.222 J BDL BDL 0.482 J BDL BDL 0.363 J BDL BDL
Arsenic 0.68 1.41 1.72 1.26 1.19 1.12 1.68 0.995 0.595 2.45 1.24 1.71 1.15 0.917 1.17
Beryllium 31 0.0982 J 0.0745 J 0.408 J 0.126 J 0.141 J 0.691 0.0733 J 0.0628 J 0.637 0.214 J 0.133 J 0.110 J 0.0970 J 0.116 J
Cadmium 14 BDL 1.69 0.422 J BDL 0.171 J 0.629 BDL BDL 0.630 0.160 J BDL BDL BDL BDL
Total Chromium 23,000 5.57 20.1 3.99 4.80 3.98 5.32 4.23 2.89 9.06 5.32 6.44 5.11 3.56 7.04
Hexavalent Chromium 0.31 NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Copper 630 2.80 5.23 2.46 2.35 3.38 3.10 3.01 1.61 7.84 2.29 3.56 2.52 2.72 3.06
Iron 11,000 3,540 4,950 2,340 3,100 3,060 3,160 2,930 1,710 5,850 3,680 4,510 3,780 2,350 3,720
Lead 400 3.94 68.5 3.80 3.94 3.69 4.02 2.96 2.39 27.5 3.38 4.25 3.22 2.08 22.0
Manganese 380 8.83 16.8 11.1 11.0 39.1 15.1 9.51 9.31 15.8 8.93 19.7 11.7 7.88 13.7
Mercury 2.3 0.0206 B J 0.304 0.0217 B 0.0218 B 0.0275 B J 0.0203 B J 0.0311 B 0.0174 B J 0.0263 B 0.0289 B 0.0201 B J 0.0198 B J 0.0118 B J 0.0209 B J
Nickel 310 2.01 2.53 2.44 2.50 2.72 3.48 3.63 2.03 4.83 2.94 2.33 2.58 1.50 2.81
Selenium 78 0.319 J 0.218 J 0.450 J 0.245 J BDL 0.793 BDL BDL 0.518 J 0.333 J 0.303 J 0.216 J BDL 0.279 J
Silver 78 BDL BDL 0.238 J BDL BDL 0.323 J BDL BDL 0.354 J BDL BDL BDL BDL BDL
Thallium 0.16 BDL BDL 0.480 J BDL BDL 0.658 BDL BDL 0.677 0.195 J BDL BDL BDL BDL
Zinc 4,700 9.96 67.2 10.9 10.4 32.7 12.9 8.80 6.46 32.5 9.13 14.8 8.02 5.46 11.5
EPA 350.1 / EPA 353.2 / EPA 9056
Nitrogen, Ammonia 6,200,000,000 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Nitrogen, Nitrate 25,000 BDL BDL BDL BDL 0.0114 BDL BDL BDL BDL BDL 0.0058 BDL BDL BDL
Sulfate NE 0.0301 J BDL BDL 0.0284 J BDL BDL BDL 0.0828 0.0527 J BDL BDL BDL 0.0599 BDL
EPA 8082A
PCB-1248 (Aroclor 1248)0.23 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
PCB-1254 (Aroclor 1254)0.23 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0721 BDL BDL BDL
EPA 8260D
2-Butanone (MEK)5,500 BDL BDL BDL BDL 0.0072 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Acetone 12,000 BDL 0.0115 J BDL BDL 0.201 0.0383 J 0.0110 J BDL 0.0118 J BDL BDL BDL BDL BDL
Methyl acetate 16,000 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Methylene Chloride 58 0.0041 J BDL 0.0042 J 0.0036 J 0.0057 J 0.0043 J 0.0040 J BDL 0.0045 J 0.0041 J BDL BDL BDL BDL
EPA 8270E No Analytes Detected
3.) Values reported in mg/kg (milligrams per kilogram).
6.) B = The same analyte is found in the associated blank.
7.) BDL = Below Detection Limit
9) Background concentration of Arsenic ranges from 0.442 to 9.21 mg/kg.
8.) Chromium PSRG value based on Chromium (III).
5/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/20195/20/2019 5/21/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019
SC-2 (1.5)SC-3 (0.5)SC-3 (1.5)SC-4 (0.5)SC-5 (0.5)SC-6 (0.5)SC-6 (1.5)SC-7 (0.5)SC-7 (1.5)
2.) Bold = Indicates concentrations above the corresponding PSRG.
SC-2 (0.5)
1.) PSRG = North Carolina Department of Environmental
Quality Preliminary Soil Remediation (June 2021).
5.) J = The identification of the analyte is acceptable;
the reported value is an estimate.
Residential Preliminary PSRG
(mg/kg)
DUP-3 DUP-4 SC-1 (0.5)SC-1 (1.5)
Page 1 of 3
Rockingham, Richmond County, North Carolina NONCD0000594 Old Richmond County LF
EVALUATION OF WDA EXISTING SOIL COVER FOR USE AS THE PERMANENT COVER SYSTEM
TABLE 4
PARAMETER
SAMPLE DATE
Method 6020B / Method 7471B
Antimony 6.3
Arsenic 0.68
Beryllium 31
Cadmium 14
Total Chromium 23,000
Hexavalent Chromium 0.31
Copper 630
Iron 11,000
Lead 400
Manganese 380
Mercury 2.3
Nickel 310
Selenium 78
Silver 78
Thallium 0.16
Zinc 4,700
EPA 350.1 / EPA 353.2 / EPA 9056
Nitrogen, Ammonia 6,200,000,000
Nitrogen, Nitrate 25,000
Sulfate NE
EPA 8082A
PCB-1248 (Aroclor 1248)0.23
PCB-1254 (Aroclor 1254)0.23
EPA 8260D
2-Butanone (MEK)5,500
Acetone 12,000
Methyl acetate 16,000
Methylene Chloride 58
EPA 8270E No Analytes Detected
3.) Values reported in mg/kg (milligrams per kilogram).
6.) B = The same analyte is found in the associated blank.
7.) BDL = Below Detection Limit
9) Background concentration of Arsenic ranges from 0.442 to 9.21 mg/kg.
8.) Chromium PSRG value based on Chromium (III).
2.) Bold = Indicates concentrations above the corresponding PSRG.
1.) PSRG = North Carolina Department of Environmental
Quality Preliminary Soil Remediation (June 2021).
5.) J = The identification of the analyte is acceptable;
the reported value is an estimate.
Residential Preliminary PSRG
(mg/kg)
BDL BDL BDL 0.225 J BDL BDL BDL BDL BDL BDL 0.231 J BDL BDL BDL
3.27 1.44 1.20 1.31 2.21 2.48 3.84 1.51 2.91 3.49 2.75 2.10 0.772 0.829
0.164 J BDL BDL BDL 0.0770 J 0.106 J 0.106 J BDL 0.0910 J 0.355 J 0.516 J 0.0764 J 0.112 J 0.0838 J
BDL 0.515 J BDL BDL BDL BDL BDL BDL BDL 0.338 J 0.502 J BDL BDL BDL
10.5 6.56 4.41 5.80 7.57 9.87 15.6 6.32 12.4 13.9 9.16 6.24 3.99 3.57
0.547 J NA NA NA NA NA BDL NA BDL BDL NA NA NA NA
3.61 2.91 2.54 2.31 5.55 5.15 5.79 1.94 4.64 5.28 3.71 3.17 1.60 2.01
7,120 3,260 2,980 3,660 4,190 6,530 9,530 3,750 7,480 8,290 5,040 4,380 2,350 2,120
2.36 19.7 6.21 2.70 3.87 3.33 3.91 2.45 3.83 4.08 4.54 2.57 2.21 2.74
5.69 6.79 6.24 4.73 7.63 7.48 8.54 5.36 8.61 9.05 5.34 7.21 5.86 30.1
0.0174 B J 0.144 0.0335 B 0.0119 B J 0.0484 0.0254 B 0.0267 B 0.0168 B J 0.0272 B 0.0458 0.0233 B 0.0142 B J 0.0427 0.0135 B J
2.08 1.60 1.41 1.49 2.31 2.62 3.14 2.22 2.66 3.29 2.76 1.27 1.88 1.66
0.358 J 0.252 J 0.333 J BDL 0.259 J 0.275 J 0.560 BDL 0.328 J 0.504 J 0.868 0.409 J BDL 0.226 J
BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.182 J 0.303 J BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.396 J 0.508 J BDL BDL BDL
5.42 23.0 5.70 4.04 J 11.4 8.50 13.8 5.65 8.25 8.29 7.74 5.77 6.57 15.5
BDL BDL BDL BDL 0.0440 BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0347 J BDL BDL BDL 0.0612 0.0336 J 0.0673 0.0443 J 0.0483 J 0.0388 J BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0293 J BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL 0.0657 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL 0.0123 J BDL BDL 0.249 BDL BDL BDL 0.0123 J BDL BDL 0.0183 J 0.0377 J BDL
BDL BDL BDL BDL 0.0084 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0043 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/20195/20/2019 5/21/2019 5/21/2019
SC-10 (1.5)SC-11 (0.5)SC-11 (1.5)SC-12 (0.5)SC-12 (1.5)SC-13 (0.5)SC-13 (1.5)SC-14 (0.5)SC-15 (0.5)SC-16 (0.5)SC-17 (0.5)SC-10 (0.5)SC-8 (0.5)SC-9 (0.5)
Page 2 of 3
Rockingham, Richmond County, North Carolina NONCD0000594 Old Richmond County LF
EVALUATION OF WDA EXISTING SOIL COVER FOR USE AS THE PERMANENT COVER SYSTEM
TABLE 4
PARAMETER
SAMPLE DATE
Method 6020B / Method 7471B
Antimony 6.3
Arsenic 0.68
Beryllium 31
Cadmium 14
Total Chromium 23,000
Hexavalent Chromium 0.31
Copper 630
Iron 11,000
Lead 400
Manganese 380
Mercury 2.3
Nickel 310
Selenium 78
Silver 78
Thallium 0.16
Zinc 4,700
EPA 350.1 / EPA 353.2 / EPA 9056
Nitrogen, Ammonia 6,200,000,000
Nitrogen, Nitrate 25,000
Sulfate NE
EPA 8082A
PCB-1248 (Aroclor 1248)0.23
PCB-1254 (Aroclor 1254)0.23
EPA 8260D
2-Butanone (MEK)5,500
Acetone 12,000
Methyl acetate 16,000
Methylene Chloride 58
EPA 8270E No Analytes Detected
3.) Values reported in mg/kg (milligrams per kilogram).
6.) B = The same analyte is found in the associated blank.
7.) BDL = Below Detection Limit
9) Background concentration of Arsenic ranges from 0.442 to 9.21 mg/kg.
8.) Chromium PSRG value based on Chromium (III).
2.) Bold = Indicates concentrations above the corresponding PSRG.
1.) PSRG = North Carolina Department of Environmental
Quality Preliminary Soil Remediation (June 2021).
5.) J = The identification of the analyte is acceptable;
the reported value is an estimate.
Residential Preliminary PSRG
(mg/kg)
BDL BDL BDL 0.105 BDL BDL 0.274 J BDL BDL BDL BDL
1.47 1.06 1.36 1.37 1.29 0.901 1.17 0.558 J 1.20 1.09 1.62
0.158 J 0.120 J 0.108 J 0.137 0.140 J 0.0846 J 0.0711 J BDL 0.0705 J BDL BDL
BDL BDL BDL 0.0382 BDL BDL BDL BDL BDL BDL BDL
6.81 4.74 5.76 4.53 4.06 3.05 3.60 1.91 3.72 2.97 4.87
NA NA NA NA NA NA NA NA NA NA NA
2.87 2.45 2.84 2.27 2.46 1.53 1.95 0.866 J 2.35 1.58 2.51
5,330 3,700 4,740 4,040 3,670 2,630 2,830 1,420 3,630 2,740 3,470
4.20 7.87 4.31 3.22 3.44 2.04 2.15 0.722 2.17 4.40 1.71
18.2 20.5 26.1 18.7 17.1 10.0 7.01 4.18 10.4 13.0 2.97
0.0353 B 0.0253 B 0.0225 B 0.0227 0.0188 J 0.0148 J 0.0162 J 0.00617 J 0.0274 0.0204 J 0.530
3.46 2.36 3.36 1.68 1.56 1.16 1.12 0.525 J 1.35 1.11 0.687
0.256 J 0.250 J 0.365 J 0.272 0.251 J BDL BDL BDL BDL 0.233 J BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL 0.0907 BDL BDL BDL BDL BDL BDL BDL
10.7 14.8 14.0 5.34 7.20 3.70 J 4.56 J 1.80 J 10.6 7.79 6.31
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL 0.0691 0.0698 0.0939
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0340 J 0.0745 J 0.0415 J 0.0375 J 0.0667 J BDL 0.0309 J BDL 0.0855 J 0.0540 J 0.0701 J
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0078 J
BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019
SC-23 (1.5)SC-24 (0.5)SC-24 (1.5)SC-25 (0.5)SC-19 (0.5)SC-20 (0.5)SC-21 (0.5)SC-22 (0.5)SC-22 (1.5)SC-23 (0.5)SC-18 (0.5)
Page 3 of 3
Rockingham, Richmond County, North Carolina NONCD0000594 Old Richmond County LF
EVALUATION OF WDA EXISTING SOIL COVER FOR USE AS THE PERMANENT COVER SYSTEM
TABLE 4
PARAMETER SW-1 SW-2
SAMPLE DATE 4/4/2019 4/4/2019
SAMPLE TIME 10:10 13:30
Temperature ° C 13.6 23.7
Conductivity μs/cm2 175.2 NR
Specific Conductance μs/cm2 223.7 222.2
pH std unit 6.53 6.54
Oxidation Reduction Potential (ORP)mV 118.5 4.9
Dissolved Oxygen (DO)mg/L 6.79 4.90
Turbidity (no decant)NTU 6.77 16.9
Turbidity (post decant)NTU NA 12.4
Notes:
1.) NR = Not Recorded
2.) NA = Not Applicable
Unit
YSI Multiparameter Meter: Professional Plus
2100Q Portable Turbidimeter
Page 1 of 1
Rockingham, Richmond County, North Carolina NONCD0000594
Old Richmond County LF
NATURAL ATTENUATION PARAMETERS
SURFACE WATER
TABLE 5
TABLE 6
SURFACE WATER INVESTIGATION
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER SW-1 SW-DUP
(SW-1 DUP)SW-2 EB-1
SAMPLE DATE 4/4/2019 4/4/2019 4/4/2019 4/4/2019
Nitrogen, Ammonia 1900a BDL 0.062 J 0.066 J BDL
Arsenic 150b 0.25 0.24 0.35 BDL
Copper 1.96c 0.26 J 0.27 J 0.47 J BDL
Iron 1,000d 1,180 1,170 2,120 27.6 J
Lead 0.35c 0.17 0.092 J 0.16 BDL
Manganese 100e 74.9 74.6 132 1.2
Nickel 11.57c 0.29 J 0.29 J 0.30 J 0.32 J
Selenium 5 0.088 J 0.080 J 0.089 J BDL
Zinc 26.21c BDL BDL 1.6 J 82.4
1,4-Dichlorobenzene 900e 2.7 J 2.9 J 2.7 J 2.4 J
Nitrate as N NE 260 260 150 NA
Sulfate NE 34,400 34,700 43,100 NA
Hexavalent Chromium-Low Level 11b 0.0545 J NA BDL NA
Carcinogenic 1.70E-06
Non Carcinogenic 5.20E-02
Notes:
1.) Values reported in µg/L (micrograms per liter).
2.) NC 2B Standard = Title 15A NCAC 2B Surface Water Standard, unless otherwise noted.
9.) Bold = Indicates concentrations above the corresponding standard.
10.) NE = Not Established.
11.) J = The identification of the analyte is acceptable; the reported value is an estimate.
12.) BDL = Below Detection Limit.
13.) NA = Not Analyzed.
8.) e = EPA Nationally Recommended Water Quality Criteria for Aquatic Life & Human Health Class C Fish Consumption
Standards.
NC 2B
Standards
(µg/L)
Analytical Method EPA 9056A
Analytical Method EPA 8270E
Metals (ICPMS) by Analytical Method 6020B
Ammonia by Analytical Method EPA 350.1
Wet Chemistry by Method 218.6
3.) The sampled surface water body is not classified by the NCDEQ’s Department of Water Resources. However, the surface
water body is a tributary which drains into the Hitchcock Creek which is a Class C surface water body. Therefore, Class C
standards are used in this table.
4.) a = NC 2B Standard not listed for constituent. Standard used from the EPA document titled "Final Aquatic Life Ambient
Water Quality Criteria For Ammonia-Freshwater 2013." The EPA's national recommended final acute ambient water quality
criteria (AWQC) for protecting freshwater organisms from potential effects of ammonia is 17,000 µg/L total ammonia nitrogen
(TAN) and the final chronic AWQC for ammonia is 1,900 µg/L TAN at pH 7.0 and temperature 20 °C.
5.) b = Chronic NC 2B Standard for Class C waters.
6.) c = Calculated Chronic NC 2B Standard based on the Equations for Hardness-Dependent Metals. An average hardness value
of 16.914 is used based on data collected from 3/22/1983 to 12/19/1996 at the NCDEQ’s Ambient Monitoring (AM) Station
Q9660000. This AM station is located on Hitchcock Creek, downgradient from sampled surface water body.
7.) d = EPA Nationally Recommended Water Quality Criteria for Aquatic Life & Human Health Class C Aquatic Life
Standards.
NCDEQ Risk Calculator Direct Contact - Recreator
Page 1 of 1
PARAMETER SED-1 SED-DUP
(SED-1 DUP)SED-2
SAMPLE DATE 4/4/2019 4/4/2019 4/4/2019
2-Butanone (MEK)5,500 0.0076 J 0.0086 J BDL
Acetone 12,000 0.0855 J 0.0450 J BDL
Methylene Chloride 58 0.0266 0.0150 J 0.399 J
2-Furanmethanol, 5-ethen NE NR NR 0.637 J
4,4,8-Trimethyltricyclo NE 0.270 J NR 0.882 J
Unknown NE 0.274 J 1.520 J 0.830 J
Unknown NE 0.441 J NR 0.481 J
Unknown NE NR NR 2.080 J
Sulfate NE 0.0446 J 0.0476 J 0.220
Mercury 2.3 0.0415 0.0472 0.0669
Arsenic (BG - 1-3 mg/kg)0.68 1.15 1.61 1.79
Beryllium 31 0.128 J BDL 0.148 J
Chromium 23,000 5.55 4.62 5.03
Copper 630 3.15 3.51 2.94
Iron 11,000 2,810 3,270 5,720
Lead 250 9.30 8.70 6.30
Manganese 380 21.6 29.6 34.6
Nickel 310 1.65 1.44 1.88
Selenium 78 0.844 J 0.384 J 1.10
Zinc 4,700 8.45 J 5.02 J 5.27 J
Hexavalent Chromium 0.31 BDL NA BDL
Notes:
1.) Values reported in mg/kg (milligrams per kilogram).
2.) PSRG = North Carolina Department of Environmental Quality Preliminary Soil Remediation Goal (June 2021 2021).
3.) Bold = Indicates concentrations above the respective Residential Health Based PSRG.
4.) BG - Naturally occuring arsenic concentrations in the area range from 1 to 3 mg/kg (USGS NURE database)
5.) J = The identification of the analyte is acceptable; the reported value is an estimate.
6.) BDL = Below Detection Limit.
7.) NE = Not Established.
8.) NR = Not Reported.
9.) Chromium PSRG value based on Chromium (III).
10.) Background concentration for Aresenic ranged from 1 to 3 mg/kg.
IC Anions by Analytical Method EPA 9056
Mercury by Method 7471B
Metals (ICPMS) by Method 6020B
Wet Chemistry by Method 7199
Residential Health
Based PSRG
(mg/kg)
Volatile Organics by Analytical Method EPA 8260D
Tentatively Identified Compounds by Analytical Method EPA 8270E
Page 1 of 1
Rockingham, Richmond County, North Carolina NONCD0000594
Old Richmond County LF
SEDIMENT INVESTIGATION
TABLE 7
TM-1 5/8/2019 5/13/2019 35.0005927 -79.7723234 2 10-20 20.00 386.51 11.75 374.76
TM-2 5/8/2019 5/13/2019 34.9999201 -79.7723514 2 5-15 15.00 375.93 8.83 367.10
TM-3 5/8/2019 5/13/2019 34.9996910 -79.7730492 2 16-26 26.00 388.12 19.24 368.88
TM-4 5/8/2019 5/13/2019 34.9995567 79.7753909 2 24-34 34.00 415.51 31.39 384.12
TM-5 5/8/2019 5/13/2019 34.9993056 79.7744184 2 20-30 30.00 401.55 20.34 381.21
TM-6 5/8/2019 5/13/2019 35.0006693 79.7734874 2 25-35 35.00 409.53 26.62 382.91
TM-7 5/8/2019 5/13/2019 35.0004366 79.7744934 2 15-25 25.00 395.74 16.94 378.80
Notes:
1.) GPS coordinates tied to the World Geodectic System (WGS84).
2.) Groundwater elevations and contours tied to WGS 84 Datum.
Groundwater Elevation
(feet)
Monitoring Well
ID Date Installed Date Measured Latitude Longitude
Well Casing
Diameter
(inches)
Screen
Interval
(feet)
Well Depth
(feet)
Top of Casing
Elevation (feet)Depth to Water (feet)
Rockingham, Richmond County, North Carolina NONCD0000594
Old Richmond County LF
GROUNDWATER INVESTIGATION - WELL CONSTRUCTION
TABLE 8
TABLE 9
GROUNDWATER ANALYTICAL DATA
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER TMW-1 TMW-2 TMW-3 TMW-4 TMW-5 DUP-B
(Dup to TW-5)TMW-6 TMW-7 DUP-C
(Dup to TW-7)
SAMPLE DATE 5/14/2019 5/14/2019 5/14/2019 5/13/2019 5/13/2019 5/13/2019 5/13/2019 5/14/2019 5/14/2019
PCBs Aroclor’s via USEPA Method 8082A (Unit-specified change from PCBs and congeners by EPA Method 1668) in μg/L
No analytes detected above laboratory detection limits.
METALS (ICPMS) by Method 6020B in μg/L
Arsenic 10 0.27 0.16 BDL 0.16 0.82 0.14 0.19 0.26 0.36
Cadmium 2 0.57 BDL BDL BDL BDL BDL BDL BDL BDL
Chromium 10 BDL BDL BDL BDL 2.3 BDL BDL 0.51 0.87
Copper 1,000 29.5 40.4 BDL 32.5 2.2 39.0 38.4 61.9 115
Iron 300 58.3 251 27.7 J 141 1,090 202 298 145 355
Lead 15 0.20 0.22 BDL 0.11 2.2 0.10 0.13 0.23 0.74
Manganese 50 91.7 74.4 0.55 51.2 35.9 16.4 16.2 43.2 7.2
Nickel 100 4.9 1.4 BDL 4.2 2.0 1.1 1.1 3.0 0.91
Selenium 20 0.18 J 0.084 J BDL 0.17 J 0.22 J 0.095 J 0.088 J 0.80 0.11 J
Zinc 1,000 135 30.2 BDL 31.3 6.3 26.6 26.4 30.8 55.1
MERCURY by Method 7470A in μg/L
No analytes detected above laboratory detection limits.
SEMI-VOLATILE ORGANIC COMPOUNDS (GC/MS) by EPA 8270E by SIM in μg/L
2-Methylnaphthalene 30 BDL BDL 0.010 J BDL 0.011 J BDL 0.0084 J BDL 0.0098 J
Fluoranthene 300 BDL BDL 0.020 J BDL BDL BDL BDL BDL BDL
TENTATIVELY IDENTIFIED COMPOUNDS - SVOCS (GC/MS) by Method 8270E in μg/L
1,2:4,5-Dibenzopyrene NE NA NA NA 6.1 J 9.0 J NA NA NA NA
Hexadecanoic acid NE NA NA NA NA NA NA 6.2 J 6.7 J NA
Undecane NE NA NA NA 6.1 J 5.7 J NA 6.4 J NA NA
Unknown NE NA NA NA NA 7.2 J 5.3 J 6.3 J 8.5 J NA
Unknown NE NA NA NA NA 5.6 J NA 5.0 J NA NA
VOLATILE ORGANIC COMPOUNDS (GC/MS) by Method 8260D in μg/L
1,4-Dioxane (p-Dioxane)3 BDL BDL BDL 1.4 J BDL BDL BDL BDL BDL
Acetone 6,000 10.6 J BDL 27.8 BDL BDL BDL BDL BDL BDL
Toluene 600 BDL BDL BDL BDL 0.54 J 0.51 J BDL BDL BDL
TENTATIVELY IDENTIFIED COMPOUNDS - VOCS (GC/MS) by Method 8260D in μg/L
Isopropyl Alcohol NE 18.4 J NA 66.5 J NA 6.6 J NA NA NA NA
Unknown NE 38.0 J 44.4 J 39.2 J 17.2 J 29.5 J 30.1 J 49.3 J 17.8 J 16.8 J
Unknown NE NA 19.6 J NA NA NA 8.0 J 18.3 J 114 J 142 J
Unknown NE NA 16.0 J NA NA NA NA NA NA NA
NITRATE & SULFATE in μg/L by Method 9056A in μg/L
Nitrate as N 10,000 5,000 8,500 3,500 72 J 2,200 2,200 4,800 850 850
Sulfate 250,000 600 J 68,300 12,200 800 J 10,200 10,600 880 J BDL BDL
ADDITIONAL ANALYTES by EPA 350.1 Rev 2.0 1993 in μg/L
Nitrogen, Ammonia 1,500 BDL 54 J 200 BDL BDL BDL BDL BDL BDL
Carcinogenic 1.90E-05
Non Carcinogenic 9.20E-01
Carcinogenic 3.80E-06
Non Carcinogenic 1.50E-01
Notes:
1.) Values reported in µg/L (micrograms per liter).
2.) NC 2L Standards = 15A NCAC 02L .0202 Groundwater Quality Standards established by North Carolina Department of Environmental Quality in 2013.
3.) Bold = Indicates concentrations above the corresponding 2L Standard.
4.) J = Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
5.) NE = Not Established
6.) BDL = Not Detected at or above adjusted reporting limit.
7.) NA = Not Applicable
NC 2L
STANDARDS
(μg/L)
NCDEQ Risk Calculator
Direct Contact - Residential
Groundwater Use
Direct Contact - Non Residential
Groundwater Use
Page 1 of 1
TABLE 10
POTABLE WATER SUPPLY WELL SAMPLING
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
WSW-4 DUP-A
34.9972141 34.9972141
-79.7721421 -79.7721421
7/15/2020 7/15/2020
µg/L µg/L
300 300 113 ND
50 50 90.4 88.6
250,000 250,000 4,970 J 5,000
Notes:
1. μg/L = Micrograms per liter.
2. ND = Below Laboratory Reporting Limit.
3. J = Concentration estimate above method detection limit, but below reporting limit.
4. BOLD = Values above MCLs for drinking water or NC 2L Standard for groundwater.
15A NCAC 02L
Groundwater
Standards (µg/L)
Sulfate
SAMPLE ID
Latitude
Longitude
Sample Date
Constituents
Iron
Manganese
Metals by Method 6020B
Method 9056A
Maximum
Contaminant
Levels for
Drinking Water
(µg/L)
VOCs Carbon
Dioxide Oxygen Hydrogen
Sulfide
Barometric
Pressure
Relative
Humidity Temperature
(ppm)(%Vol)(%LEL)(µg/m³)(%Vol)(%Vol)(ppm)(inches Hg)(%)(°F)
BG-1 7/29/2020 12:49 0.1 0.0 0.0 0.00 0.0 20.7 0 29.58 52.4 98
5/16/2019 8:43 0.1 0.0 0.0 0.00 5.4 15.6 1 29.62 55.6 58.1
7/29/2020 12:52 0.2 0.0 0.0 0.00 4.6 16.5 0
5/16/2019 8:49 1.1 0.0 0.0 0.00 1.9 19.1 0
7/29/2020 12:56 0.1 0.0 0.0 0.00 1.4 19.4 0
5/16/2019 8:55 0.9 0.0 0.0 0.00 3.5 17.5 0
7/29/2020 13:00 0.1 0.0 0.0 0.00 2.6 18.7 0
5/16/2019 9:00 0.6 0.0 0.0 0.00 11.9 9.4 0
7/29/2020 13:04 0.1 0.0 0.0 0.00 11.6 10.3 0
5/16/2019 9:04 0.7 0.0 0.0 0.00 13.1 6.6 0
7/29/2020 13:08 0.3 0.0 0.0 0.00 12.3 9.1 0
5/16/2019 9:07 0.7 0.0 0.0 0.00 0.6 20.7 0
7/29/2020 13:12 0.0 0.0 0.0 0.00 0.6 20.1 0
5/16/2019 9:12 0.2 0.0 0.0 0.00 9.3 11.0 0
7/29/2020 13:16 0.1 0.0 0.0 0.00 3.6 17.3 0
5/16/2019 9:15 0.4 0.0 0.0 0.00 3.9 17.3 0
7/29/2020 13:20 0.0 0.0 0.0 0.00 2.3 18.7 0
5/16/2019 9:21 2.2 0.0 0.0 0.00 4.5 17.1 0
7/29/2020 13:24 0.0 0.0 0.0 0.00 4.0 17.3 0
5/16/2019 9:27 1.0 0.0 0.0 0.00 1.5 20.2 0
7/29/2020 13:27 0.1 0.0 0.0 0.00 1.0 20.1 0
GP-11 7/29/2020 13:33 0.2 0.0 0.0 0.00 0.4 20.6 0
GP-12 7/29/2020 13:36 0.1 0.0 0.0 0.00 0.8 20.3 0
GP-13 7/29/2020 13:38 0.1 0.0 0.0 0.00 0.4 20.7 0
GP-14 7/29/2020 13:42 0.1 0.0 0.0 0.00 0.5 20.6 0
GP-15 7/29/2020 13:46 0.2 0.0 0.0 0.00 1.4 19.8 0 29.58 64.4 92
GP-16 7/29/2020 13:49 0.1 0.0 0.0 0.00 7.9 13.6 0
GP-17 7/29/2020 13:54 0.2 0.0 0.0 0.00 0.4 20.8 0
GP-18 7/29/2020 13:57 0.2 0.0 0.0 0.00 0.2 21.1 0
DUP-D 7/29/2020 14:00 0.3 0.0 0.0 0.00 1.4 19.9 0
Notes:
1.) VOCs = Volatile Organic Compounds.
2.) LEL = Lower Explosive Limit. Readings which exceeded the LEL of 5% for Methane are recorded as ">100."
3.) µg/m³ = Micrograms per cubic meter.
4.) Hg = Mercury.
5.) ppm = Parts Per Million.
6.) Methane (µg/m³) calculated using the following forumla: = [(% by volume)*10,000*16.04 / 24.45]*1000, where 16.04 grams/mol is the molecular weight of Methane and 24.45 is a
conversion factor that represents the volume of one mole of gas in liters.
SAMPLE ID DATE TIME Methane
GP-1
GP-2
GP-3
GP-4
GP-5
GP-10
GP-9
GP-6
GP-7
GP-8
Rockingham, Richmond County, North Carolina NONCD0000594
Old Richmond County LF
LANDFILL GAS SURVEY RESULTS
TABLE 11
TABLE 12
SOIL GAS PROBE RESULTS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
GP-1 GP-2 GP-3 GP-4 GP-10 DUP-C
(GP-10)GP-11 GP-12 GP-13 GP-14 GP-15 GP-16 GP-17 GP-18
34.9996710 35.0002161 35.0003549 34.9999160 34.9996020 34.9996020 34.9995681 34.9999680 35.0002408 35.0003574 34.9996765 34.9994157 34.9995341 34.9996601
-79.7747728 -79.7748066 -79.7742352 -79.7738618 -79.7738855 -79.7738855 -79.7750967 -79.7749930 -79.7749779 -79.7747336 -79.7738622 -79.7744226 -79.7733378 -79.7737415
7/28/2020 7/28/2020 7/28/2020 7/28/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/28/2020 7/28/2020 7/28/2020
µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3 µg/m3
35,000 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.93 BDL BDL
NE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 5.80 BDL BDL
420 6.97 21.0 36.6 3.75 21.4 25.3 13.4 3.06 9.72 5.40 2.83 2.89 6.82 7.51
NE 51.0 3.57 9.44 70.6 BDL BDL 7.20 6.41 BDL 2.38 2.75 14.0 BDL BDL
420 1.59 4.29 7.56 BDL 4.23 5.06 2.77 BDL 2.14 1.04 BDL BDL 1.63 1.51
NE BDL BDL BDL BDL 10.5 12.5 BDL BDL 2.00 BDL BDL BDL BDL BDL
19 1.02 BDL BDL BDL BDL BDL 1.07 BDL 2.40 BDL BDL BDL BDL BDL
35,000 7.25 3.75 BDL BDL BDL BDL 7.7 BDL 7.61 4.28 BDL BDL BDL 5.54
1,400 12.8 13.3 12.3 12.9 3.12 BDL 34.9 21.5 12.0 8.78 6.61 31.5 25.1 27.3
NE 5.06 8.98 14.5 2.29 10.1 11.8 7.56 2.12 6.38 3.94 2.03 1.89 4.73 3.74
220,000 49.0 18.0 8.13 9.67 18.2 14.4 39.2 16.0 34.2 15.7 22.5 12.4 28.5 27.1
12 BDL BDL BDL BDL BDL BDL BDL BDL 0.920 BDL BDL BDL BDL BDL
2.5 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 10.8 BDL
4,900 8.43 8.93 BDL 9.00 3.17 3.67 20.6 12.7 8.06 6.88 8.03 6.75 11.3 4.42
350 BDL 1.48 2.07 1.90 BDL BDL BDL 1.52 BDL BDL BDL BDL 1.9 2.05
4.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 243 BDL
630 0.832 0.744 0.777 BDL 1.10 1.77 0.787 BDL 1.16 1.01 BDL 1.81 0.494 1.47
NE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 4.84 0.860
700 239 5.19 16.1 43.6 5.34 5.49 9.69 6.78 3.4 3.35 7.27 33.6 2.86 3.16
NE 39.8 35.1 28.3 29.4 25.3 17.0 40.0 40.7 35.3 15.4 104 45.3 42.8 120
37 BDL BDL BDL BDL 0.897 0.897 1.47 BDL 1.28 0.889 1.45 BDL 0.932 BDL
2,800 BDL BDL BDL BDL BDL BDL 1.10 BDL 1.1 BDL BDL BDL BDL BDL
700 3.23 BDL BDL 2.38 3.56 3.42 5.07 3.07 4.94 2.78 3.20 1.96 3.46 2.63
3,400 BDL 4.48 1.74 1.00 12.3 BDL BDL BDL BDL BDL BDL 0.944 4.97 BDL
4,900 13.0 2.30 3.30 BDL 26.0 8.74 9.52 BDL 29.9 17.0 3.39 BDL 5.22 BDL
700 1.45 0.915 0.889 1.32 1.59 1.57 3.70 1.80 3.11 2.75 1.76 1.27 1.72 1.55
21,000 3.27 B 1.54 B 1.72 B 1.81 B 1.96 B 1.98 B 2.19 B 1.37 B 1.86 B 2.19 B 2.41 B 2.03 B 1.54 B 1.70 B
7,000 1.17 BDL 1.09 1.11 BDL 0.923 5.19 1.11 1.89 1.26 1.55 1.01 1.16 1.23
280 21.8 19.5 50.2 15.1 3.16 4.64 2.51 21.7 1.91 BDL 5.09 46.2 132 8.96
NE 3.83 BDL BDL BDL BDL BDL BDL BDL 6.55 BDL BDL BDL BDL BDL
35,000 3.43 1.90 1.52 2.28 4.52 3.02 3.64 2.52 4.11 2.61 3.62 2.23 3.68 2.88
NE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.03 BDL BDL
14 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.32 7.13 BDL
Trichlorofluoromethane NE 142 10.3 95.5 127 4.13 4.34 7.53 5.00 2.37 3.47 9.33 26.2 1.68 1.92
6.50E-05
3.70E-01
5.00E-06
3.00E-02
Notes:
1. μg/m3 - Micrograms per Cubic Meter.
2. B - The same analyte is found in the associated blank.
3. BDL - Below detection limit
4. SGSL - North Carolina Department of Environmental Quality Residential Soil Gas Screening Levels (updated July 2020).
5. - Bold - concentration exceeds Residential SGSL
6. NE - Residential SGSL Not Established.
Carcinogenic
Non Carcinogenic
Vapor Intrusion -
Non Residential
Soil Gas to Indoor
Air
Carcinogenic
Non Carcinogenic
Toluene
trans-1,2-Dichloroethene
Trichloroethylene
Vapor Intrusion -
Residential Soil
Gas to Indoor Air
n-Hexane
o-Xylene
Propene
Styrene
Tetrachloroethylene
Tetrahydrofuran
NCDEQ Risk Calculator
Methylene Chloride
Bromodichloromethane
Carbon disulfide
Chlorobenzene
Chloroform
Chloromethane
cis-1,2-Dichloroethene
Dichlorodifluoromethane
Ethanol
Ethylbenzene
Heptane
m&p-Xylene
Benzene
1,1,1-Trichloroethane
1,1,2-Trichlorotrifluoroethane
1,2,4-Trimethylbenzene
1,2-Dichlorotetrafluoroethane
1,3,5-Trimethylbenzene
1,3-Dichlorobenzene
1,4-Dioxane
2-Butanone (MEK)
2-Propanol
4-Ethyltoluene
Acetone
SAMPLE ID
Residential
SGSLs
(µg/m3)
Latitude
Longitude
Sample Date
Constituents

FIGURES

PO
P
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Y
S
E
E
D

D
R
I
V
E
WASTE DISPOSAL
AREA A (4.683 ACRES)
WOODED TREE AREA (2.95 ACRES)
X
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SUBJECT PROPERTY
N/FDAVID M. TARLTON & WIFE,
TAMMIE J. TARLTON
PIN # 746502854954
DB 1368 PG 124
DB 1733 PG 360
PLAT 783 PAGE Q
14.158 ACRES
(616,711 SF)
THIS PORTION OF
THE SUBJECT PROPERTY
DESCRIBED IN
DB 1733 PG 360
PROPERTY NOTE:
RICHMOND COUNTY GIS SHOWS THIS AREA BEING
A PORTION OF THE SUBJECT PROPERTY, BUT THE
SURVEYOR FOUND NO LEGAL REFERENCE FOR A
RECOMBINATION OF THE LEGAL LOTS. THIS AREA
WAS ACQUIRED BY THE TARLTON'S BY WAY OF THE
SAME DEED THAT IS REFERENCED FOR THE PROPERTY
LYING SOUTH OF THE SUBJECT PROPERTY.
GIS LINE ONLY - SHOWN APPROXIMATE
410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
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NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
T T
E E
TELEPHONE LINE
ELECTRICAL UNDERGROUND
OHU OVERHEAD UTILITY
W W WATER LINE
X X FENCE/ELECTRIC FENCE
UTILITY POLEP
410
WASTE DISPOSAL
AREA B (0.210 ACRES)
WOODED TREE AREA
(0.19 ACRES)
S
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LEACH FIELD
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380
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362
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418
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HA-5
HA-6
HA-4
HA-3HA-2HA-1
HA-7
HA-11
HA-8
HA-9
HA-10
X
X
X
X
X
X
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X
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X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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GIS LINE ONLY - SHOWN APPROXIMATE
410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
4
41
6
408
406
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402
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394
392 388 386 384
382
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B-18B
B-18A
B-17G
B-17A B-17B
B-17JB-17C
B-17H
B-17F
B-17D
B-17I
B-17E
B-10A
B-10B
B-10C
B-9A
B-9B
B-8B
B-8A
B-7B
B-6B
B-6A
B-5A
B-5B
B-5C
B-4A
B-4B
B-3B
B-3A
B-2A
B-2B
B-2C
B-1CB-1A B-1B
B-14A
B-14B B-13A
B-13B
B-12A
B-11A
B-11BB-12B
B-3C
B-3D
B-3E
B-15B
B-15A
B-16D
B-16B
B-16C
B-16A
WASTE DISPOSAL
AREA A
WASTE DISPOSAL
AREA B
SCALE: 1" = 100'
100 0 25 1005075
N
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
HA-1 HAND AUGER
Boring Identification
B-13B SOIL BORING
Boring Identification
WETLAND/STREAM BOUNDARY
STRUCTURES
ROADS
B-7A
BERM-1
Figure:
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07/15/2021
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410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
4
41
6
408
406
404
402
398
396
394
392 388 386 384
382
408
406
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394
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394
392
392
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382
384
38638
2
38
4
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2
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384
384
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38
8
402
396
398
398
386
WASTE DISPOSAL
AREA B
AGV-7
AGV-8
AGV-9
AGV-10
AGV-13
AGV-12 AGV-11
AGV-26
AGV-25
AGV-29
AGV-32
AGV-33
AGV-30AGV-31
AGV-34
AGV-28
AGV-27
AGV-35
AGV-36
AGV-24
AGV-23
AGV-14
AGV-4
AGV-15
AGV-22
AGV-21
AGV-6
AGV-5
AGV-2AGV-1
AGV-17AGV-18
AGV-16
AGV-20
AGV-19
AGV-37
AGV-38
AGV-3
WASTE DISPOSAL
AREA A
360
360
37
0
370
370
380
380
380
380
380
39
0
39
0400410420 362
362
364
364
366
366
366
366
36
8
368
368
37
2
372
372
37
4
374
374
37
6
376
376
378
378
37
8
37
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38
2
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38
4
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38
6
38
8
38
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39
2
39
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39
4
396
39
6
398402404406408412
41
4
414416
416
418
418
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
AGV-1 ABOVE GROUND VAPOR POINT
Point Identification
WETLAND/STREAM BOUNDARY
SCALE: 1" = 100'
100 0 25 1005075
N
STRUCTURES
ROADS
PID -0.2 ppm
Figure:
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H:
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THIS PORTION OF
THE SUBJECT PROPERTY
DESCRIBED IN
DB 1733 PG 360
GIS LINE ONLY - SHOWN APPROXIMATE
410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
4
41
6
408
406
404
402
398
396
394
392 388 386 384
382
408
406
404 402
400
394
398402
39
6
394
392
392
394
396
38
8
378
382
384
38638
2
38
4
388
39
2
384
384
384
386
38
8
402
396
398
398
386
WASTE DISPOSAL
AREA B
X
X
X
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
X
X
X
X
X
X
XXXXXXXXXXXXXXXXXXXXXXX
SB-17
SB-16
SB-11
SB-12
SB-13
SB-14
SB-15
B-18B
B-18A
SB-21
SB-20
SB-19
SB-18
B-17G
B-17A
B-17B
B-17J
B-17C
B-17H
B-17F
B-17D
B-17ISB-10
B-17E
B-10A
B-10B
B-10C
B-9A
B-9B
B-8B
B-8A
B-7B
B-6B
B-6AB-5A
B-5B
B-5C
B-4A
B-4B
B-3B
B-3A
B-2A
B-2B B-2C
B-1CB-1A B-1B
B-14A
B-14B B-13A
B-13B
SB-3
B-12A
B-11A
B-11B
B-12B
SB-2
SB-6
SB-7
SB-8
SB-9
SB-5
SB-4
SB-1
B-7A
BERM-1
B-15A
B-15B
B-16D
B-16B
B-16CB-16A
B-3C
B-3D
B-3E
WASTE DISPOSAL
AREA A
SCALE: 1" = 100'
100 0 25 1005075
N
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
SOIL BORING LOCATION
Boring Identification
SB-11
X X FENCE
WETLAND/STREAM BOUNDARY
STRUCTURES
ROADS
Figure:
Dra
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SB-16
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SB-3
SB-2
SB-6
SB-7
SB-8
SB-9
SB-5
SB-1
GIS LINE ONLY - SHOWN APPROXIMATE
B-18B
B-17A
B-17C
B-17D
B-17I
SB-10
B-17E
B-10B
B-10C
B-9B
B-8B
B-6B
B-5A B-5B
B-4B
B-3B
B-2C
B-1C
B-14A
B-13A
B-12A
B-11A
SB-4
B-3DB-15A
B-16B
WASTE DISPOSAL
AREA A
WASTE DISPOSAL
AREA B
B-7A
SC-1
SC-2
SC-3
SC-4
SC-5
SC-6
SC-7
SC-8
SC-9
SC-10
SC-11
SC-12
SC-13
SC-14
SC-15
SC-16
SC-17
SC-18
SC-19
SC-20
SC-21
SC-22
SC-23 SC-24
SC-25
15"
15"
12"
12"
18"
21"
36"
18"36"
12"36"
18"
36"
21"
12"
12"
18"
15"
24"
36"
12"
15"
36"
36"
36"
18"
30"
24"
BERM-112"
48"48"
48"
36"
15"
18"
36"
48"
48"
24"
72"
30"
48"
24"
18"30"
18"
60"
30"
15"
36"
18"
18"
12"
12"
24"
12"
66"
12"
60"
48"
60"
36"
30"
60"
18"0"-18"
SCALE: 1" = 100'
100 0 25 1005075
N
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
HA-1 HAND AUGER
Boring Identification
SOIL COVER POINTSSC-22
Well Identification
Soil Cover Thickness
36"
18" < 36" SOIL COVER THICKNESS
0" < 18" SOIL COVER THICKNESS
WETLAND/STREAM BOUNDARY
STRUCTURES
ROADS
Figure:
Dra
w
i
n
g

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i
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e
:
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.

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:
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B
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:
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D
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:
Scale:
Date:
H:
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2
0
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O
F
F
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L
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7
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07/01/2021
SE
E

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AS SHOWN
DH SL
5
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:
1.
Fe
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2.
Fig
u
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e

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d
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1
9
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3

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3
2
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S
E
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D

D
R
I
V
E
HO
U
S
E
TR
A
I
L
E
R
GIS LINE ONLY - SHOWN APPROXIMATE WASTE DISPOSAL
AREA B (0.210 ACRES)
(WASTE VOLUME = 1,900 yd^³)
WASTE DISPOSAL
AREA A (4.683 ACRES)
(WASTE VOLUME = 29,900 yd^³)
BERM-1
SB-17
SB-16
B-18B
B-17A
B-17C
B-17D
B-17I
SB-10
B-17E
B-10C
B-9B
B-8B
B-14A
SB-3
SB-2
SB-6
SB-7
SB-8
SB-9
SB-5
SB-4
SB-1
B-15A
B-16B
B-3D
5.0
0.5
6.5
4.0
10
10
8.0
3.0
4.0
4.0
2.0
4.0
5.5
6.0
4.0
5.5
3.0
1.5
2.5
2.0
1.0
5.0
2.0
1.5
SCALE: 1" = 100'
100 0 25 1005075
N
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
SOIL BORING LOCATIONSB-7
Boring Identification
Soil Cover Thickness
7.5' < 10 WASTE THICKNESS
5' < 7.5' WASTE THICKNESS
2.5' < 5' WASTE THICKNESS
0' < 2.5' WASTE THICKNESS
NOTE: ALL LOCATIONS ARE APPROXIMATE
2.5
WETLAND/STREAM BOUNDARY
STRUCTURES
ROADS
Figure:
Dra
w
i
n
g

F
i
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e
:
Pr
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e
c
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b
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:
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:
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B
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:
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D
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:
Scale:
Date:
H:
\
2
0
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0
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6
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D

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HA-2
HA-1
HA-7
GIS LINE ONLY - SHOWN APPROXIMATE
410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
4
41
6
408
406
404
402
398
396
394
392 388 386 384
382
408
406
404 402
400
394
398402
39
6
394
392
392
394
396
38
8
378
382
384
38638
2
38
4
388
39
2
384
384
384
386
38
8
402
396
398
398
386
WASTE DISPOSAL
AREA A
WASTE DISPOSAL
AREA B
SC-1
SC-2
SC-3
SC-4
SC-5
SC-6
SC-7 SC-8
SC-9
SC-10
SC-11
SC-12
SC-13
SC-14
SC-15
SC-16
SC-17
SC-18
SC-19
SC-20
SC-21
SC-22
SC-23 SC-24
SC-25
1.25
1.25
1.0
1.0
1.5
1.75
>3.0
2.5 >3.0
1.0
>3.0
2.5
>3.0
1.75
1.0
1.0
2.5
1.25
2.5
>3.0 1.0
1.25
>3.0
>3.0
>3.0
1.5
2.5
2.0
SCALE: 1" = 100'
100 0 25 1005075
N
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
HA-1 HAND AUGER
Boring Identification
SOIL COVER POINTSSC-22
Well Identification
Soil Cover Thickness
>3.0
WETLAND/STREAM BOUNDARY
STRUCTURES
ROADS
Figure:
Dra
w
i
n
g

F
i
l
e
:
Pr
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c
t

N
u
m
b
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:
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:
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.

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:
Ap
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B
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:
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D
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:
Scale:
Date:
H:
\
2
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0
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F
F
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S
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07/01/2021
SE
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7
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:
1.
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a
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2.
Fig
u
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(
0
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7
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2
0
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)

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SW/
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HO
U
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TR
A
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L
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GIS LINE ONLY - SHOWN APPROXIMATE
410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
4
41
6
408
406
404
402
398
396
394
392 388 386 384
382
408
406
404 402
400
394
398402
39
6
394
392
392
394
396
38
8
378
382
384
38638
2
38
4
388
392
384
384
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38
8
402
396
398
398
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360
360
37
0
370
370
380
380
380
380
380
39
0
39
0400410420 362
362
364
364
366
366
366
366
36
8
368
368
37
2
372
372
37
4
374
374
37
6
376
376
378
378
37
8
37
8
378
38
2
382
38
4
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38
6
38
8
38
8
39
2
39
2394
39
4
396
39
6
398402404406408412
41
4
414416
416
418
418
SPRING
SCALE: 1" = 100'
100 0 25 1005075
N
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
WETLAND/STREAM BOUNDARY
SW/SED-2 SURFACE WATER / SEDIMENT SAMPLE
Sample Identification
STRUCTURES
ROADS
WASTE DISPOSAL
AREA B
WASTE DISPOSAL
AREA A
Figure:
Dra
w
i
n
g

F
i
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e
:
Pr
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u
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:
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:
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.

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:
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:
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:
Scale:
Date:
H:
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07/08/2021
SE
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410
410
410
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390
380
390
380
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390
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41
4
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374
372 370 368
360
360
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370
380
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39
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362
364
364
366
366
366
366
36
8
368
368
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372
372
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4
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374
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6
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376
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38
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39
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39
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39
4
396
39
6
398402404406408412
41
4
414416
416
418
418
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
370 GROUNDWATER ELEVATION CONTOUR
(DASHED WHERE INFERRED)
GROUNDWATER FLOW DIRECTION
TMW-2
367.10 MONITORING WELL
Well Identification
Relative Groundwater Elevation (ft)
WETLAND/STREAM BOUNDARY
STRUCTURES
ROADS
SCALE: 1" = 100'
100 0 25 1005075
N
WASTE DISPOSAL
AREA B
WASTE DISPOSAL
AREA A
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410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
4
41
6
408
406
404
402
398
396
394
392 388 386 384
382
408
406
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400
394
398402
39
6
394
392
392
394
396
38
8
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382
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38638
2
38
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39
2
384
384
384
386
38
8
402
396
398
398
386
P
WASTE DISPOSAL
AREA B
TMW-4
TMW-3
TMW-2
TMW-1
TMW-7
TMW-6
TMW-5
WASTE DISPOSAL
AREA A
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
TMW-1 MONITORING WELL
Well Identification
WETLAND/STREAM BOUNDARY
STRUCTURES
ROADS
SCALE: 1" = 100'
100 0 25 1005075
N
Figure:
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420
42
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420
42042
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43043
0
430
440440
440LEGEND:
RICHMOND COUNTY PARCELS
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
WASTE DISPOSAL AREA
Well Identification
WSW-5
FIRE HYDRANT
WSW-4
WSW-3
WSW-6
WSW-5
WSW-1
WSW-2
WSW-7
430
WASTE
DISPOSAL
AREA A
(4.683
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WASTE DISPOSAL
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1,000 FT.
OFFSET
NOT SAMPLED
WATER SUPPLY WELL
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WSW-4 SAMPLED
WATER SUPPLY WELL
Figure:
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410
410
410
400
400
390
390
380
390
380
390
390
390
412
41
4
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360
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370
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380
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380
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0
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0400410420 362
362
364
364
366
366
366
366
36
8
368
368
37
2
372
372
37
4
374
374
37
6
376
376
378
378
37
8
37
8
378
38
2
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38
4
384386
38
6
38
8
38
8
39
2
39
2394
39
4
396
39
6
398402404406408412
41
4
414416
416
418
418
NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
410
LANDFILL GAS MONITORING POINTGP-1
Point Identification
WETLAND/STREAM BOUNDARY
SCALE: 1" = 100'
100 0 25 1005075
N
STRUCTURES
ROADS
DISPOSAL
WASTE AREA A
DISPOSAL
WASTE AREA B
Figure:
Dra
w
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n
g

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:
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Scale:
Date:
H:
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12
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APPENDIX A
Risk Calculator

TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE
Antimony 0.283 J BDL BDL 0.354 J 0.222 J BDL BDL 0.482 J BDL BDL 0.363 J BDL BDL
Arsenic 1.26 1.41 1.19 1.12 1.68 0.995 0.595 2.45 1.24 1.71 1.15 0.917 1.17
Beryllium 0.408 J 0.0982 J 0.126 J 0.141 J 0.691 0.0733 J 0.0628 J 0.637 0.214 J 0.133 J 0.110 J 0.0970 J 0.116 J
Cadmium 0.422 J BDL BDL 0.171 J 0.629 BDL BDL 0.630 0.160 J BDL BDL BDL BDL
Chromium 3.99 5.57 4.80 3.98 5.32 4.23 2.89 9.06 5.32 6.44 5.11 3.56 7.04
Hexavalent Chromium NA NA NA NA NA NA NA NA NA NA NA NA NA
Copper 2.46 2.80 2.35 3.38 3.10 3.01 1.61 7.84 2.29 3.56 2.52 2.72 3.06
Iron 2,340 3,540 3,100 3,060 3,160 2,930 1,710 5,850 3,680 4,510 3,780 2,350 3,720
Lead 3.80 3.94 3.94 3.69 4.02 2.96 2.39 27.5 3.38 4.25 3.22 2.08 22.0
Manganese 11.1 8.83 11.0 39.1 15.1 9.51 9.31 15.8 8.93 19.7 11.7 7.88 13.7
Mercury 0.0217 B 0.0206 B J 0.0218 B 0.0275 B J 0.0203 B J 0.0311 B 0.0174 B J 0.0263 B 0.0289 B 0.0201 B J 0.0198 B J 0.0118 B J 0.0209 B J
Nickel 2.44 2.01 2.50 2.72 3.48 3.63 2.03 4.83 2.94 2.33 2.58 1.50 2.81
Selenium 0.450 J 0.319 J 0.245 J BDL 0.793 BDL BDL 0.518 J 0.333 J 0.303 J 0.216 J BDL 0.279 J
Silver 0.238 J BDL BDL BDL 0.323 J BDL BDL 0.354 J BDL BDL BDL BDL BDL
Thallium 0.480 J BDL BDL BDL 0.658 BDL BDL 0.677 0.195 J BDL BDL BDL BDL
Zinc 10.9 9.96 10.4 32.7 12.9 8.80 6.46 32.5 9.13 14.8 8.02 5.46 11.5
Nitrogen, Ammonia BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Nitrogen, Nitrate BDL BDL BDL 0.0114 BDL BDL BDL BDL BDL 0.0058 BDL BDL BDL
Sulfate BDL 0.0301 J 0.0284 J BDL BDL BDL 0.0828 0.0527 J BDL BDL BDL 0.0599 BDL
PCB-1248 (Aroclor 1248)BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
PCB-1254 (Aroclor 1254)BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0721 BDL BDL BDL
2-Butanone (MEK)BDL BDL BDL 0.0072 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Acetone BDL BDL BDL 0.201 0.0383 J 0.0110 J BDL 0.0118 J BDL BDL BDL BDL BDL
Methyl acetate BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Methylene Chloride 0.0042 J 0.0041 J 0.0036 J 0.0057 J 0.0043 J 0.0040 J BDL 0.0045 J 0.0041 J BDL BDL BDL BDL
Method 6020B / Method 7471B / Method 7199
EPA 350.1 / EPA 353.2 / EPA 9056
EPA 8082A
EPA 8260D
DUP-3
(SC-1 (0.5))
5/20/2019 5/20/20195/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019
SC-2 (1.5)SC-3 (0.5)SC-3 (1.5)SC-4 (0.5)SC-5 (0.5)SC-6 (0.5)SC-1 (0.5)SC-1 (1.5)SC-2 (0.5)
5/20/2019 5/20/2019 5/20/2019 5/20/2019
SC-6 (1.5)SC-7 (0.5)SC-7 (1.5)
5/20/2019
Page 1 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE
Antimony BDL BDL 0.178 J BDL 0.225 J BDL BDL BDL BDL BDL BDL 0.231 J BDL BDL BDL
Arsenic 3.27 1.44 1.72 1.20 1.31 2.21 2.48 3.84 1.51 2.91 3.49 2.75 2.10 0.772 0.829
Beryllium 0.164 J BDL 0.0745 J BDL BDL 0.0770 J 0.106 J 0.106 J BDL 0.0910 J 0.355 J 0.516 J 0.0764 J 0.112 J 0.0838 J
Cadmium BDL 0.515 J 1.69 BDL BDL BDL BDL BDL BDL BDL 0.338 J 0.502 J BDL BDL BDL
Chromium 10.5 6.56 20.1 4.41 5.80 7.57 9.87 15.6 6.32 12.4 13.9 9.16 6.24 3.99 3.57
Hexavalent Chromium 0.547 J T8 NA NA NA NA NA NA BDL T8 NA BDL T8 BDL T8 NA NA NA NA
Copper 3.61 2.91 5.23 2.54 2.31 5.55 5.15 5.79 1.94 4.64 5.28 3.71 3.17 1.60 2.01
Iron 7,120 3,260 4,950 2,980 3,660 4,190 6,530 9,530 3,750 7,480 8,290 5,040 4,380 2,350 2,120
Lead 2.36 19.7 68.5 6.21 2.70 3.87 3.33 3.91 2.45 3.83 4.08 4.54 2.57 2.21 2.74
Manganese 5.69 6.79 16.8 6.24 4.73 7.63 7.48 8.54 5.36 8.61 9.05 5.34 7.21 5.86 30.1
Mercury 0.0174 B J 0.144 0.304 0.0335 B 0.0119 B J 0.0484 0.0254 B 0.0267 B 0.0168 B J 0.0272 B 0.0458 0.0233 B 0.0142 B J 0.0427 0.0135 B J
Nickel 2.08 1.60 2.53 1.41 1.49 2.31 2.62 3.14 2.22 2.66 3.29 2.76 1.27 1.88 1.66
Selenium 0.358 J 0.252 J 0.218 J 0.333 J BDL 0.259 J 0.275 J 0.560 BDL 0.328 J 0.504 J 0.868 0.409 J BDL 0.226 J
Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.182 J 0.303 J BDL BDL BDL
Thallium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.396 J 0.508 J BDL BDL BDL
Zinc 5.42 23.0 67.2 5.70 4.04 J 11.4 8.50 13.8 5.65 8.25 8.29 7.74 5.77 6.57 15.5
Nitrogen, Ammonia BDL BDL BDL BDL BDL 0.0440 BDL BDL BDL BDL BDL BDL BDL BDL BDL
Nitrogen, Nitrate BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Sulfate 0.0347 J BDL BDL BDL BDL 0.0612 0.0336 J 0.0673 0.0443 J 0.0483 J 0.0388 J BDL BDL BDL BDL
PCB-1248 (Aroclor 1248)BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0293 J BDL BDL BDL BDL
PCB-1254 (Aroclor 1254)BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Butanone (MEK)BDL BDL BDL BDL BDL 0.0657 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Acetone BDL 0.0123 J 0.0115 J BDL BDL 0.249 BDL BDL BDL 0.0123 J BDL BDL 0.0183 J 0.0377 J BDL
Methyl acetate BDL BDL BDL BDL BDL 0.0084 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Methylene Chloride 0.0043 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
5/21/2019 5/21/2019 5/21/2019 5/21/2019
SC-8 (0.5)SC-9 (0.5)
Method 6020B / Method 7471B / Method 7199
EPA 350.1 / EPA 353.2 / EPA 9056
EPA 8082A
EPA 8260D
DUP-4
(SC-9 (0.5))
5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/20195/20/2019 5/21/2019 5/21/2019 5/21/2019
SC-13 (1.5)SC-14 (0.5)SC-15 (0.5)SC-16 (0.5)SC-17 (0.5)SC-10 (1.5)SC-11 (0.5)SC-11 (1.5)SC-12 (0.5)SC-12 (1.5)SC-13 (0.5)SC-10 (0.5)
Page 2 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE
Antimony BDL BDL BDL 0.105 BDL BDL 0.274 J BDL BDL BDL BDL NR NR NR 0.482
Arsenic 1.47 1.06 1.36 1.37 1.29 0.901 1.17 0.558 J 1.20 1.09 1.62 1.15 1.61 1.79 3.84
Beryllium 0.158 J 0.120 J 0.108 J 0.137 0.140 J 0.0846 J 0.0711 J BDL 0.0705 J BDL BDL 0.128 J BDL 0.148 J 0.691
Cadmium BDL BDL BDL 0.0382 BDL BDL BDL BDL BDL BDL BDL NR NR NR 1.69
Chromium 6.81 4.74 5.76 4.53 4.06 3.05 3.60 1.91 3.72 2.97 4.87 5.55 4.62 5.03 20.1
Hexavalent Chromium NA NA NA NA NA NA NA NA NA NA NA BDL NA BDL 0.547
Copper 2.87 2.45 2.84 2.27 2.46 1.53 1.95 0.866 J 2.35 1.58 2.51 3.15 3.51 2.94 7.84
Iron 5,330 3,700 4,740 4,040 3,670 2,630 2,830 1,420 3,630 2,740 3,470 2,810 3,270 5,720 9,350
Lead 4.20 7.87 4.31 3.22 3.44 2.04 2.15 0.722 2.17 4.40 1.71 9.30 8.70 6.30 68.5
Manganese 18.2 20.5 26.1 18.7 17.1 10.0 7.01 4.18 10.4 13.0 2.97 21.6 29.6 34.6 39.1
Mercury 0.0353 B 0.0253 B 0.0225 B 0.0227 0.0188 J 0.0148 J 0.0162 J 0.00617 J 0.0274 0.0204 J 0.530 0.0415 0.0472 0.0669 0.53
Nickel 3.46 2.36 3.36 1.68 1.56 1.16 1.12 0.525 J 1.35 1.11 0.687 1.65 1.44 1.88 4.83
Selenium 0.256 J 0.250 J 0.365 J 0.272 0.251 J BDL BDL BDL BDL 0.233 J BDL 0.844 J 0.384 J 1.10 1.1
Silver BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.354
Thallium BDL BDL BDL 0.0907 BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.677
Zinc 10.7 14.8 14.0 5.34 7.20 3.70 J 4.56 J 1.80 J 10.6 7.79 6.31 8.45 J 5.02 J 5.27 J 67.2
Nitrogen, Ammonia BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.044
Nitrogen, Nitrate BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0114
Sulfate BDL BDL BDL BDL BDL BDL BDL BDL 0.0691 0.0698 0.0939 0.0446 J 0.0476 J 0.220 0.22
PCB-1248 (Aroclor 1248)BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0293
PCB-1254 (Aroclor 1254)BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0721
2-Butanone (MEK)BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0076 J 0.0086 J BDL 0.0657
Acetone 0.0340 J 0.0745 J 0.0415 J 0.0375 J 0.0667 J BDL 0.0309 J BDL 0.0855 J 0.0540 J 0.0701 J 0.0855 J 0.0450 J BDL 0.249
Methyl acetate BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0078 J NR NR NR 0.0084
Methylene Chloride BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0266 0.0150 J 0.399 J 0.399
4/4/2019 4/4/2019 4/4/2019
Exposure Point
Concentration
SC-23 (1.5)SC-24 (0.5)SC-24 (1.5)SC-25 (0.5)SC-23 (0.5)
Method 6020B / Method 7471B / Method 7199
EPA 350.1 / EPA 353.2 / EPA 9056
EPA 8082A
EPA 8260D
SED-1 SED-DUP
(SED-1 SUP)SED-2
5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019
SC-22 (0.5)SC-22 (1.5)SC-18 (0.5)SC-19 (0.5)SC-20 (0.5)SC-21 (0.5)
Page 3 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE
Method 6020B / Method 7471B / Method 7199
DUP-3
(SC-1 (0.5))
5/20/2019 5/20/20195/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019
SC-2 (1.5)SC-3 (0.5)SC-3 (1.5)SC-4 (0.5)SC-5 (0.5)SC-6 (0.5)SC-1 (0.5)SC-1 (1.5)SC-2 (0.5)
5/20/2019 5/20/2019 5/20/2019 5/20/2019
SC-6 (1.5)SC-7 (0.5)SC-7 (1.5)
5/20/2019
.alpha.-Pinene BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.234 J BDL BDL BDL
11H-Dibenzo[b,e][1,4]dia BDL BDL 0.0057 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Octen-3-ol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1R-.alpha.-Pinene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Furanmethanol, 5-ethen NR NR NR NR NR NR NR NR NR NR NR NR NR
2,5-Dimethoxy-4-(methylsu BDL 0.0282 J BDL BDL 0.0230 J BDL BDL BDL BDL BDL BDL BDL BDL
2-Pentene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Pentene, (E)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Pentene, (Z)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
3-Hydroxymandelic acid, BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
4,4,8-Trimethyltricyclo NR NR NR NR NR NR NR NR NR NR NR NR NR
4-Hydroxymandelic acid, BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
4-Iodo-3-methoxyamphetami BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzaldehyde, 2,4-bis(tr 0.0087 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzeneethanamine, N-[(p BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzoic acid, 2-[(trimet BDL BDL BDL BDL 0.0074 J BDL BDL BDL BDL BDL BDL BDL BDL
Butanal, 3-methyl-BDL BDL BDL 0.0143 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Butane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Butane, 2-methyl-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclopropane, 1,2-dimeth BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclotrisiloxane, hexame BDL 0.0084 J 0.011 J 0.0142 J 0.0140 J BDL BDL 0.0065 J BDL BDL BDL BDL BDL
Dodecanoic acid, 11-amino BDL BDL BDL 0.0621 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Fluoxetine BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Isobutane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Pentane BDL BDL BDL 0.0064 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
p-Trimethylsilyloxypheny BDL 0.0054 J BDL 0.0072 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Silane, 1,4-phenylenebis 0.0175 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
.beta.-Sitosterol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
.gamma.-Sitosterol BDL BDL BDL 30.200 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,2:4,5-Dibenzopyrene 1.260 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
14-Pentadecenoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Heneicosyl formate BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Heptadecene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Phenanthrenecarboxyli BDL BDL BDL 8.29 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
3-Eicosene, (E)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
4-Tetradecanol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
9-Octadecenamide, (Z)-BDL BDL BDL BDL BDL 0.242 J BDL 0.205 J 0.225 J BDL BDL BDL BDL
a'-Neogammacer-22(29)-e BDL BDL BDL 11.200 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclohexane, 1-(1,5-dim BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclononasiloxane, octa BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclotetracosane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclotetradecane BDL BDL BDL 0.594 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Friedelan-3-one BDL BDL BDL BDL 1.250 J BDL BDL BDL BDL BDL BDL BDL BDL
EPA 8260D TICs
Page 4 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE 5/21/2019 5/21/2019 5/21/2019 5/21/2019
SC-8 (0.5)SC-9 (0.5)
Method 6020B / Method 7471B / Method 7199
DUP-4
(SC-9 (0.5))
5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/20195/20/2019 5/21/2019 5/21/2019 5/21/2019
SC-13 (1.5)SC-14 (0.5)SC-15 (0.5)SC-16 (0.5)SC-17 (0.5)SC-10 (1.5)SC-11 (0.5)SC-11 (1.5)SC-12 (0.5)SC-12 (1.5)SC-13 (0.5)SC-10 (0.5)
.alpha.-Pinene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
11H-Dibenzo[b,e][1,4]dia BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Octen-3-ol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1R-.alpha.-Pinene BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0259 J BDL BDL BDL BDL BDL
2-Furanmethanol, 5-ethen NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR
2,5-Dimethoxy-4-(methylsu 0.0298 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Pentene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Pentene, (E)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
2-Pentene, (Z)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
3-Hydroxymandelic acid, BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0064 J BDL
4,4,8-Trimethyltricyclo NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR
4-Hydroxymandelic acid, BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
4-Iodo-3-methoxyamphetami BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzaldehyde, 2,4-bis(tr BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzeneethanamine, N-[(p BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Benzoic acid, 2-[(trimet BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Butanal, 3-methyl-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Butane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Butane, 2-methyl-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclopropane, 1,2-dimeth BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclotrisiloxane, hexame BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0149 J 0.0175 J
Dodecanoic acid, 11-amino BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Fluoxetine BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Isobutane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Pentane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
p-Trimethylsilyloxypheny BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.0075 J
Silane, 1,4-phenylenebis BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
.beta.-Sitosterol BDL BDL BDL 1.020 J BDL 0.386 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
.gamma.-Sitosterol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1,2:4,5-Dibenzopyrene BDL BDL 3.680 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
14-Pentadecenoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Heneicosyl formate BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Heptadecene BDL BDL BDL BDL 0.221 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
1-Phenanthrenecarboxyli BDL BDL BDL BDL 0.767 J 0.551 J BDL BDL BDL 0.269 J BDL BDL BDL 0.200 J BDL
3-Eicosene, (E)-BDL BDL BDL 0.482 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
4-Tetradecanol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
9-Octadecenamide, (Z)-BDL BDL BDL BDL BDL BDL BDL 0.239 J BDL BDL 0.913 J 0.187 J BDL BDL BDL
a'-Neogammacer-22(29)-e BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclohexane, 1-(1,5-dim BDL BDL BDL BDL BDL 0.373 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclononasiloxane, octa BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclotetracosane BDL BDL BDL 1.10 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Cyclotetradecane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Friedelan-3-one BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
EPA 8260D TICs
Page 5 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE 4/4/2019 4/4/2019 4/4/2019
Exposure Point
Concentration
SC-23 (1.5)SC-24 (0.5)SC-24 (1.5)SC-25 (0.5)SC-23 (0.5)
Method 6020B / Method 7471B / Method 7199
SED-1 SED-DUP
(SED-1 SUP)SED-2
5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019
SC-22 (0.5)SC-22 (1.5)SC-18 (0.5)SC-19 (0.5)SC-20 (0.5)SC-21 (0.5)
.alpha.-Pinene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.234
11H-Dibenzo[b,e][1,4]dia BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0057
1-Octen-3-ol BDL BDL BDL BDL BDL BDL BDL BDL 0.0094 J BDL 0.0049 J NR NR NR 0.0094
1R-.alpha.-Pinene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0259
2-Furanmethanol, 5-ethen NR NR NR NR NR NR NR NR NR NR NR NR NR 0.637 J 0.637
2,5-Dimethoxy-4-(methylsu BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0298
2-Pentene BDL BDL BDL BDL BDL BDL 0.0085 J BDL BDL BDL BDL NR NR NR 0.0085
2-Pentene, (E)-BDL BDL BDL BDL BDL BDL 0.0101 J BDL BDL BDL BDL NR NR NR 0.0101
2-Pentene, (Z)-BDL BDL BDL BDL BDL BDL BDL BDL 0.0062 J BDL BDL NR NR NR 0.0062
3-Hydroxymandelic acid, BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0064
4,4,8-Trimethyltricyclo NR NR NR NR NR NR NR NR NR NR NR 0.270 J NR 0.882 J 0.882
4-Hydroxymandelic acid, BDL BDL BDL BDL BDL BDL 0.0057 J BDL BDL BDL BDL NR NR NR 0.0057
4-Iodo-3-methoxyamphetami BDL BDL BDL BDL BDL BDL BDL BDL 0.0293 J BDL BDL NR NR NR 0.0293
Benzaldehyde, 2,4-bis(tr BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0087
Benzeneethanamine, N-[(p BDL 0.0067 J BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0067
Benzoic acid, 2-[(trimet 0.0057 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0074
Butanal, 3-methyl-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0143
Butane BDL BDL BDL 0.0116 J BDL 0.0081 J BDL 0.0062 J 0.0176 J BDL BDL NR NR NR 0.0176
Butane, 2-methyl-BDL BDL BDL 0.0053 J 0.0224 J 0.0334 J 0.0899 J 0.0190 J 0.0628 J 0.0120 J 0.0065 J NR NR NR 0.0899
Cyclopropane, 1,2-dimeth BDL BDL BDL BDL BDL BDL BDL BDL 0.0084 J BDL BDL NR NR NR 0.0084
Cyclotrisiloxane, hexame 0.0110 J 0.0121 J 0.0076 J BDL BDL BDL 0.0109 J 0.0065 J 0.0157 J 0.0071 J 0.0050 J NR NR NR 0.0175
Dodecanoic acid, 11-amino BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0621
Fluoxetine BDL BDL BDL BDL BDL 0.026 J BDL BDL BDL BDL BDL NR NR NR 0.026
Isobutane BDL BDL BDL BDL BDL BDL 0.0069 J BDL BDL BDL BDL NR NR NR 0.0069
Pentane BDL BDL BDL BDL 0.0097 J 0.0136 J 0.0549 J 0.0117 J 0.0394 J 0.0073 J BDL NR NR NR 0.0549
p-Trimethylsilyloxypheny BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0075
Silane, 1,4-phenylenebis BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.0175
.beta.-Sitosterol BDL 0.417 J BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 1.02
.gamma.-Sitosterol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.268 J NR NR NR 30.2
1,2:4,5-Dibenzopyrene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 3.68
14-Pentadecenoic acid BDL 0.298 J BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.298
1-Heneicosyl formate BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.189 J BDL NR NR NR 0.189
1-Heptadecene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.221
1-Phenanthrenecarboxyli BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 8.29
3-Eicosene, (E)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.482
4-Tetradecanol BDL 0.190 J BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.19
9-Octadecenamide, (Z)-BDL 0.306 J BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.913
a'-Neogammacer-22(29)-e BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 11.2
Cyclohexane, 1-(1,5-dim BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.373
Cyclononasiloxane, octa BDL BDL BDL BDL BDL BDL BDL BDL 0.202 J BDL BDL NR NR NR 0.202
Cyclotetracosane BDL 0.173 J BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 1.1
Cyclotetradecane BDL 0.321 J BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.594
Friedelan-3-one BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 1.25
EPA 8260D TICs
Page 6 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE
Method 6020B / Method 7471B / Method 7199
DUP-3
(SC-1 (0.5))
5/20/2019 5/20/20195/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019 5/20/2019
SC-2 (1.5)SC-3 (0.5)SC-3 (1.5)SC-4 (0.5)SC-5 (0.5)SC-6 (0.5)SC-1 (0.5)SC-1 (1.5)SC-2 (0.5)
5/20/2019 5/20/2019 5/20/2019 5/20/2019
SC-6 (1.5)SC-7 (0.5)SC-7 (1.5)
5/20/2019
Hexadecanoic acid BDL 0.258 J BDL BDL 0.258 J BDL BDL BDL BDL BDL BDL BDL BDL
Hexadecanol BDL BDL BDL 0.304 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Hop-22(29)-en-3.beta.-o BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Isoheptadecanol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Longipinane, (E)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
n-Hexadecanoic acid 0.354 J BDL 0.238 J 0.891 J BDL BDL BDL BDL BDL 0.255 J 0.323 J 0.184 J 0.370 J
Octadecanoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.298 J
Oleic Acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Stigmast-4-en-3-one BDL BDL BDL 4.740 J BDL BDL BDL BDL BDL BDL BDL BDL BDL
Stigmasterol, 22,23-dih BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Tetradecanoic acid BDL BDL BDL BDL BDL 0.243 J BDL BDL BDL BDL BDL BDL BDL
Tridecanoic acid BDL BDL BDL BDL BDL BDL 0.180 J BDL 0.260 J BDL BDL BDL BDL
8.) Exposure Point Concentration is the maximum concentration for each detected compound
12.) Total chromium is to only be entered as Cr III in the risk calculator if the total is within natural background levels. The NURE database indicates background levels ranging from 5-168 mg/kg and the highest concentration is 20.1 mg/kg.
13.) The DUP-4 sample indicated the highest chromium concentration. Because it is a duplicate, it was not analyzed for hexavalent chromium. ATC recognizes this as a data gap.
9.) NR = Not analyzed or not detected
10.) =Maximum concentration detected
1.) PSRG = North Carolina Department of Environmental Quality Preliminary Soil Remediation (Feb. 2018).
2.) Bold = Indicates concentrations above the corresponding PSRG.
3.) Values reported in mg/kg (milligrams per kilogram).
5.) J = The identification of the analyte is acceptable; the reported value is an estimate.
6.) B = The same analyte is found in the associated blank.
7.) BDL = Below Detection Limit
EPA 8260D TICs (continued)
11.) =Compound not listed in risk calculator
Page 7 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE 5/21/2019 5/21/2019 5/21/2019 5/21/2019
SC-8 (0.5)SC-9 (0.5)
Method 6020B / Method 7471B / Method 7199
DUP-4
(SC-9 (0.5))
5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/20195/20/2019 5/21/2019 5/21/2019 5/21/2019
SC-13 (1.5)SC-14 (0.5)SC-15 (0.5)SC-16 (0.5)SC-17 (0.5)SC-10 (1.5)SC-11 (0.5)SC-11 (1.5)SC-12 (0.5)SC-12 (1.5)SC-13 (0.5)SC-10 (0.5)
Hexadecanoic acid BDL 2.560 J BDL BDL BDL 0.373 J BDL BDL BDL BDL BDL 0.251 J BDL BDL BDL
Hexadecanol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Hop-22(29)-en-3.beta.-o BDL BDL BDL 0.775 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Isoheptadecanol BDL BDL BDL BDL 0.207 J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Longipinane, (E)-BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
n-Hexadecanoic acid BDL BDL BDL 0.405 J 0.303 J BDL 0.242 J 0.196 J BDL BDL 0.230 J BDL 0.271 J BDL 0.189 J
Octadecanoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Oleic Acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Stigmast-4-en-3-one BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Stigmasterol, 22,23-dih BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.625 J BDL BDL BDL BDL BDL
Tetradecanoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
Tridecanoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
8.) Exposure Point Concentration is the maximum concentration for each detected compound
12.) Total chromium is to only be entered as Cr III in the risk calculator if the total is within natural background levels. The NURE database indicates background levels ranging from 5-168 mg/kg and the highest concentration is 20.1 mg/kg.
13.) The DUP-4 sample indicated the highest chromium concentration. Because it is a duplicate, it was not analyzed for hexavalent chromium. ATC recognizes this as a data gap.
9.) NR = Not analyzed or not detected
10.) =Maximum concentration detected
1.) PSRG = North Carolina Department of Environmental Quality Preliminary Soil Remediation (Feb. 2018).
2.) Bold = Indicates concentrations above the corresponding PSRG.
3.) Values reported in mg/kg (milligrams per kilogram).
5.) J = The identification of the analyte is acceptable; the reported value is an estimate.
6.) B = The same analyte is found in the associated blank.
7.) BDL = Below Detection Limit
EPA 8260D TICs (continued)
11.) =Compound not listed in risk calculator
Page 8 of 9
TABLE 1
SOIL EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER
SAMPLE DATE 4/4/2019 4/4/2019 4/4/2019
Exposure Point
Concentration
SC-23 (1.5)SC-24 (0.5)SC-24 (1.5)SC-25 (0.5)SC-23 (0.5)
Method 6020B / Method 7471B / Method 7199
SED-1 SED-DUP
(SED-1 SUP)SED-2
5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/2019 5/21/20195/21/2019 5/21/2019
SC-22 (0.5)SC-22 (1.5)SC-18 (0.5)SC-19 (0.5)SC-20 (0.5)SC-21 (0.5)
Hexadecanoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.186 J BDL NR NR NR 2.56
Hexadecanol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.304
Hop-22(29)-en-3.beta.-o BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.775
Isoheptadecanol BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.207
Longipinane, (E)-BDL BDL BDL BDL 0.846 J BDL BDL BDL BDL BDL BDL NR NR NR 0.846
n-Hexadecanoic acid BDL 0.371 J 0.180 J 0.198 J BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.891
Octadecanoic acid BDL BDL BDL BDL 0.478 J BDL BDL BDL BDL BDL 0.229 J NR NR NR 0.478
Oleic Acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.184 J NR NR NR 0.184
Stigmast-4-en-3-one BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 4.74
Stigmasterol, 22,23-dih BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.625
Tetradecanoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.243
Tridecanoic acid BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NR NR NR 0.26
8.) Exposure Point Concentration is the maximum concentration for each detected compound
12.) Total chromium is to only be entered as Cr III in the risk calculator if the total is within natural background levels. The NURE database indicates background levels ranging from 5-168 mg/kg and the highest concentration is 20.1 mg/kg.
13.) The DUP-4 sample indicated the highest chromium concentration. Because it is a duplicate, it was not analyzed for hexavalent chromium. ATC recognizes this as a data gap.
1.) PSRG = North Carolina Department of Environmental Quality Preliminary Soil Remediation (Feb. 2018).
2.) Bold = Indicates concentrations above the corresponding PSRG.
3.) Values reported in mg/kg (milligrams per kilogram).
5.) J = The identification of the analyte is acceptable; the reported value is an estimate.
6.) B = The same analyte is found in the associated blank.
7.) BDL = Below Detection Limit
9.) NR = Not analyzed or not detected
10.) =Maximum concentration detected
EPA 8260D TICs (continued)
11.) =Compound not listed in risk calculator
Page 9 of 9
TABLE 2
GROUNDWATER EXPOSURE POINT CONCENTRATIONS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER TMW-1 TMW-2 TMW-3 TMW-4 TMW-5
DUP-B
(Dup to TW-
5)
TMW-6 TMW-7
DUP-C
(Dup to TW-
7)
SAMPLE DATE 5/14/2019 5/14/2019 5/14/2019 5/13/2019 5/13/2019 5/13/2019 5/13/2019 5/14/2019 5/14/2019
Arsenic 0.27 0.16 BDL 0.16 0.82 0.14 0.19 0.26 0.36 0.82
Cadmium 0.57 BDL BDL BDL BDL BDL BDL BDL BDL 0.57
Chromium BDL BDL BDL BDL 2.3 BDL BDL 0.51 0.87 2.3
Copper 29.5 40.4 BDL 32.5 2.2 39 38.4 61.9 115 115
Iron 58.3 251 27.7 J 141 1,090 202 298 145 355 1,090
Lead 0.2 0.22 BDL 0.11 2.2 0.1 0.13 0.23 0.74 2.2
Manganese 91.7 74.4 0.55 51.2 35.9 16.4 16.2 43.2 7.2 91.7
Nickel 4.9 1.4 BDL 4.2 2 1.1 1.1 3 0.91 4.9
Selenium 0.18 J 0.084 J BDL 0.17 J 0.22 J 0.095 J 0.088 J 0.8 0.11 J 0.8
Zinc 135 30.2 BDL 31.3 6.3 26.6 26.4 30.8 55.1 135
2-Methylnaphthalene BDL BDL 0.010 J BDL 0.011 J BDL 0.0084 J BDL 0.0098 J 0.011
Fluoranthene BDL BDL 0.020 J BDL BDL BDL BDL BDL BDL 0.02
1,2:4,5-Dibenzopyrene NA NA NA 6.1 J 9.0 J NA NA NA NA 9
Hexadecanoic acid NA NA NA NA NA NA 6.2 J 6.7 J NA 6.7
Undecane NA NA NA 6.1 J 5.7 J NA 6.4 J NA NA 6.4
1,4-Dioxane (p-Dioxane)BDL BDL BDL 1.4 J BDL BDL BDL BDL BDL 1.4
Acetone 10.6 J BDL 27.8 BDL BDL BDL BDL BDL BDL 27.8
Toluene BDL BDL BDL BDL 0.54 J 0.51 J BDL BDL BDL 0.54
Isopropyl Alcohol 18.4 J NA 66.5 J NA 6.6 J NA NA NA NA 66.5
Nitrate as N 5,000 8,500 3,500 72 J 2,200 2,200 4,800 850 850 8,500
Sulfate 600 J 68,300 12,200 800 J 10,200 10,600 880 J BDL BDL 68,300
Nitrogen, Ammonia BDL 54 J 200 BDL BDL BDL BDL BDL BDL 200
Notes:
1.) Values reported in µg/L (micrograms per liter).
2.) 2L Standards = 15A NCAC 02L .0202 Groundwater Quality Standards established by North Carolina Department of Environmental Quality in 2013.
3.) Bold = Indicates concentrations above the corresponding 2L Standard.
4.) J = Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
5.) NE = Not Established
6.) BDL = Not Detected at or above adjusted reporting limit.
7.) NA = Not Analyzed
8.) Exposure Point Concentration is the maximum concentration for each detected compound
9.) =Maximum concentration detected
10.) =Compound not listed in risk calculator
Exposure Point
Concentration
ADDITIONAL ANALYTES by EPA 350.1 Rev 2.0 1993 in μg/L
NITRATE & SULFATE in μg/L by Method 9056A in μg/L
TENTATIVELY IDENTIFIED COMPOUNDS - VOCS (GC/MS) by Method 8260D in μg/L
VOLATILE ORGANIC COMPOUNDS (GC/MS) by Method 8260D in μg/L
TENTATIVELY IDENTIFIED COMPOUNDS - SVOCS (GC/MS) by Method 8270E in μg/L
SEMI-VOLATILE ORGANIC COMPOUNDS (GC/MS) by EPA 8270E by SIM in μg/L
METALS (ICPMS) by Method 6020B in μg/L
Page 1 of 1
TABLE 3
SURFACE WATER EXPOSURE POINT CONCENTRATIONS
Old Richmond County Landfill
NONCD0000594
Rockingham, Richmond County, North Carolina
PARAMETER SW-1 SW-DUP
(SW-1 DUP)SW-2
SAMPLE DATE 4/4/2019 4/4/2019 4/4/2019
Nitrogen, Ammonia BDL 0.062 J 0.066 J 0.066
Arsenic 0.25 0.24 0.35 0.35
Copper 0.26 J 0.27 J 0.47 J 0.47
Iron 1,180 1,170 2,120 2,120
Lead 0.17 0.092 J 0.16 0.17
Manganese 74.9 74.6 132 132
Nickel 0.29 J 0.29 J 0.30 J 0.3
Selenium 0.088 J 0.080 J 0.089 J 0.089
Zinc BDL BDL 1.6 J 1.6
1,4-Dichlorobenzene 2.7 J 2.9 J 2.7 J 2.9
Nitrate as N 260 260 150 260
Sulfate 34,400 34,700 43,100 43,100
Hexavalent Chromium-Low Level 0.0545 J NA BDL 0.0545
Notes:
1.) Values reported in µg/L (micrograms per liter).
2.) Bold = Indicates concentrations above the corresponding standard.
3.) J = The identification of the analyte is acceptable; the reported value is an estimate.
4.) BDL = Below Detection Limit.
5.) NA = Not Analyzed.
6.) Exposure Point Concentration is the maximum concentration for each detected compound
7.) =Maximum concentration detected
8.) =Compound not listed in risk calculator
Exposure Point
Concentration
Metals (ICPMS) by Analytical Method 6020B
Ammonia by Analytical Method EPA 350.1
Analytical Method EPA 8270E
Analytical Method EPA 9056A
Wet Chemistry by Method 218.6
Page 1 of 1
TABLE 4
LANDFILL GAS EXPOSURE POINT CONCENTRATIONS
Old Richmond County LF
NONCD0000594
Rockingham, Richmond County, North Carolina
GP-1 GP-2 GP-3 GP-4 GP-10 DUP-C
(GP-10 DUP)GP-11 GP-12 GP-13 GP-14 GP-15 GP-16 GP-17 GP-18
7/28/2020 7/28/2020 7/28/2020 7/28/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/27/2020 7/28/2020 7/28/2020 7/28/2020
ND ND ND ND ND ND ND ND ND ND ND 2.93 ND ND 2.93
ND ND ND ND ND ND ND ND ND ND ND 5.80 ND ND 5.8
6.97 21.0 36.6 3.75 21.4 25.3 13.4 3.06 9.72 5.40 2.83 2.89 6.82 7.51 36.6
51.0 3.57 9.44 70.6 ND ND 7.20 6.41 ND 2.38 2.75 14.0 ND ND 70.6
1.59 4.29 7.56 ND 4.23 5.06 2.77 ND 2.14 1.04 ND ND 1.63 1.51 7.56
ND ND ND ND 10.5 12.5 ND ND 2.00 ND ND ND ND ND 12.5
1.02 ND ND ND ND ND 1.07 ND 2.40 ND ND ND ND ND 2.4
7.25 3.75 ND ND ND ND 7.7 ND 7.61 4.28 ND ND ND 5.54 7.7
12.8 13.3 12.3 12.9 3.12 ND 34.9 21.5 12.0 8.78 6.61 31.5 25.1 27.3 34.9
5.06 8.98 14.5 2.29 10.1 11.8 7.56 2.12 6.38 3.94 2.03 1.89 4.73 3.74 14.5
49.0 18.0 8.13 9.67 18.2 14.4 39.2 16.0 34.2 15.7 22.5 12.4 28.5 27.1 49
ND ND ND ND ND ND ND ND 0.920 ND ND ND ND ND 0.92
ND ND ND ND ND ND ND ND ND ND ND ND 10.8 ND 10.8
8.43 8.93 ND 9.00 3.17 3.67 20.6 12.7 8.06 6.88 8.03 6.75 11.3 4.42 20.6
ND 1.48 2.07 1.90 ND ND ND 1.52 ND ND ND ND 1.9 2.05 2.07
ND ND ND ND ND ND ND ND ND ND ND ND 243 ND 243
0.832 0.744 0.777 ND 1.10 1.77 0.787 ND 1.16 1.01 ND 1.81 0.494 1.47 1.81
ND ND ND ND ND ND ND ND ND ND ND ND 4.84 0.860 4.84
239 5.19 16.1 43.6 5.34 5.49 9.69 6.78 3.4 3.35 7.27 33.6 2.86 3.16 239
39.8 35.1 28.3 29.4 25.3 17.0 40.0 40.7 35.3 15.4 104 45.3 42.8 120 120
ND ND ND ND 0.897 0.897 1.47 ND 1.28 0.889 1.45 ND 0.932 ND 1.47
ND ND ND ND ND ND 1.10 ND 1.1 ND ND ND ND ND 1.1
3.23 ND ND 2.38 3.56 3.42 5.07 3.07 4.94 2.78 3.20 1.96 3.46 2.63 5.07
1.45 0.915 0.889 1.32 1.59 1.57 3.70 1.80 3.11 2.75 1.76 1.27 1.72 1.55 3.7
ND 4.48 1.74 1.00 12.3 ND ND ND ND ND ND 0.944 4.97 ND 12.3
13.0 2.30 3.30 ND 26.0 8.74 9.52 ND 29.9 17.0 3.39 ND 5.22 ND 29.9
3.27 B 1.54 B 1.72 B 1.81 B 1.96 B 1.98 B 2.19 B 1.37 B 1.86 B 2.19 B 2.41 B 2.03 B 1.54 B 1.70 B 3.27
1.17 ND 1.09 1.11 ND 0.923 5.19 1.11 1.89 1.26 1.55 1.01 1.16 1.23 5.19
21.8 19.5 50.2 15.1 3.16 4.64 2.51 21.7 1.91 ND 5.09 46.2 132 8.96 132
3.83 ND ND ND ND ND ND ND 6.55 ND ND ND ND ND 6.55
3.43 1.90 1.52 2.28 4.52 3.02 3.64 2.52 4.11 2.61 3.62 2.23 3.68 2.88 4.52
ND ND ND ND ND ND ND ND ND ND ND 2.03 ND ND 2.03
ND ND ND ND ND ND ND ND ND ND ND 1.32 7.13 ND 7.13
Trichlorofluoromethane 142 10.3 95.5 127 4.13 4.34 7.53 5.00 2.37 3.47 9.33 26.2 1.68 1.92 142
Notes:
1.) ND = Not Detected
2.) B = The same analyte is found in the associated blank.
3.) Bold values exceed North Carolina Department of Environmental Quality Residential Soil Gas Screening Levels (updated July 2020).
4.) Exposure Point Concentration is the maximum concentration for each detected compound
5.) Concentrations reported in micrograms per cubic meter (µg/m3)
6.) =Maximum concentration detected
7.) =Compound not listed in risk calculator
8.77
PARAMETER
Sample Date
1,1,1-Trichloroethane
1,1,2-Trichlorotrifluoroethane
1,2,4-Trimethylbenzene
Dichlorodifluoromethane
Ethanol
Ethylbenzene
Heptane
1,2-Dichlorotetrafluoroethane
cis-1,2-Dichloroethene
1,4-Dioxane
2-Butanone (MEK)
2-Propanol
4-Ethyltoluene
Acetone
Benzene
Bromodichloromethane
Carbon disulfide
1,3,5-Trimethylbenzene
1,3-Dichlorobenzene
m&p-Xylene
Methylene Chloride
Exposure Point
Concentration
Volatile Organic Compounds by Method TO-15
Trichloroethylene
n-Hexane
o-Xylene
Propene
Styrene
Tetrachloroethylene
Tetrahydrofuran
Chlorobenzene
Chloroform
Chloromethane
Toluene
trans-1,2-Dichloroethene
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SCALE: 1" = 100'
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N
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GP-2
GP-11
GP-4
GP-8
GP-7
GP-6
GP-5
GP-10
DISPOSAL
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CANOPY
SUBJECT PROPERTY
N/FDAVID M. TARLTON & WIFE,
TAMMIE J. TARLTON
PIN # 746502854954
DB 1368 PG 124
DB 1733 PG 360
PLAT 783 PAGE Q
14.158 ACRES
(616,711 SF)
THIS PORTION OF
THE SUBJECT PROPERTY
DESCRIBED IN
DB 1733 PG 360
N/FDAVID M. TARLTON & WIFE,
TAMMIE J. TARLTON
DB 1712 PG 411
PLAT SLIDE 3 MAP "B"
(LOTS 5 & 6, BLOCK A)
PROPERTY NOTE:
RICHMOND COUNTY GIS SHOWS THIS AREA BEING
A PORTION OF THE SUBJECT PROPERTY, BUT THE
SURVEYOR FOUND NO LEGAL REFERENCE FOR A
RECOMBINATION OF THE LEGAL LOTS. THIS AREA
WAS ACQUIRED BY THE TARLTON'S BY WAY OF THE
SAME DEED THAT IS REFERENCED FOR THE PROPERTY
LYING SOUTH OF THE SUBJECT PROPERTY.
GIS LINE ONLY - SHOWN APPROXIMATE
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398
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NOTE: ALL LOCATIONS ARE APPROXIMATE
TOPOGRAPHIC CONTOUR
LEGEND:
RICHMOND COUNTY PARCELS
SITE PROPERTY LINE
X X
410
DISPOSAL
WASTE AREA B
0.210 ACRES
LANDFILL GAS MONITORING POINTGP-1
Point Identification
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SURFACE
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Sample Identification
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Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Exposure Unit #1 - Resident, Non-Residential, & Recreator
North Carolina Department of Environmental Quality
Risk Calculator
Old Richmond County Landfill
Rockingham, Richmond County, North Carolina
Pre-Regulatory Landfill Unit
NONCD0000594
July 2020
May 2020 EPA RSL Table
12/7/2020
Prepared By:ATC Associates of North Carolina, P.C.
2727 E. Millbrook Road, Ste 121, Raleigh, NC 27604
Pre-Regulatory Landfill Unit
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Contaminant Migration Parameters

Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Parameter Default Value Site Specific
Value Justification
Distance to Protection of
Groundwater Point of
Exposure (POEgw) (feet)
0 0
Distance to Protection of
Surface Water Point of
Exposure (POEsw) (feet)
0 0
Depth to Base of Affected
Soils (ds) (cm)1244 183 ATC used the maximum soil cover depth within the landfill unit (6
feet, 182.88 cm) as the depth of the affected soils.
Length of Affected Soil
Parallel to Assumed GW
Flow Direction (L) (cm)
Site-specific
value required
Areal extent of soil
contamination
range 0.5-500 (As) (acres)
0.5 4.9 ATC used the entire waste disposal unit as the areal extent of soil
contamination
Fraction of vegetative cover
(V) (unitless)0.5 1.0 The entire waste disposal unit is covered with vegetation.
0.15 (soil to
outdoor air
pathway)
0.07 This value is based on the average of all laboratory reported moisture
content values for soil samples collected at the site.
0.3 (soil to
groundwater
pathway)
0.3
0.28 (soil to
outdoor air
pathway)
0.36 This value is based on the total soil porosity minus the water filled soil
porosity.
0.13 (soil to
groundwater
pathway)
0.13
Provide justification for the contaminant migration parameters used.
Water Filled Soil Porosity
(θw) (unitless)
Air Filled Soil Porosity (θa)
(unitless)
Input Form 1C
North Carolina DEQ Risk Calculator
Contaminant Migration Parameters

Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Parameter Default Value Site Specific
Value Justification
Provide justification for the contaminant migration parameters used.
Input Form 1C
Total Soil Porosity (n)
(unitless)0.43 0.43
Total porosity has not been measured at this site. The soil is
predominantly classified as a silty sand. Therefore, ATC used a
published value of fine-grained sand (McWorter and Sunada, 1997.)
Dry Soil Bulk Density (ρb)
(g/cm3)1.5 1.66
Dry bulk density has not been measured at this site. The soil is
predominantly classified as a silty sand. Therefore, ATC used a
published value sand (US EPA, 2004).
Net Infiltration Rate (I)
(cm/yr)66 66
0.006 (soil to
outdoor air
pathway)
0.006 The default value was used as fraction organic carbon has not been
measured at the site.
0.002 (soil
leaching to
groundwater
pathway)
0.002
Aquifer Hydraulic
Conductivity (K) (cm/d)
Site-specific
value required
Hydraulic Gradient (i)
(unitless)
Site-specific
value required
Average Groundwater
Temperature (Tgw) (°C)25 25
Aquifer Thickness (da) (cm)Site-specific
value required
Groundwater Source
Thickness (Sd) (cm)
Site-specific
value required
Groundwater Source Width
(Sw) (cm)
Site-specific
value required
Fraction Organic Carbon
(foc) (unitless)
North Carolina DEQ Risk Calculator
Contaminant Migration Parameters

Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Parameter Default Value Site Specific
Value Justification
Provide justification for the contaminant migration parameters used.
Input Form 1C
Plume Thickness at GW/SW
Discharge (δsw) (cm)
Site-specific
value required
Plume Width at GW/SW
Discharge (Wgwsw) (cm)
Site-specific
value required
Surface Water Flowrate at
GW/SW Discharge (Qsw)
(cm3/d)
Site-specific
value required
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Exposure Point
Concentration
(mg/kg)
Notes:CAS Number Chemical Units
0.249 See Table 1 67-64-1 Acetone mg/kg
0.482 See Table 1 7440-36-0 Antimony (metallic)mg/kg
3.84 See Table 1 7440-38-2 Arsenic, Inorganic mg/kg
0.691 See Table 1 7440-41-7 Beryllium and compounds mg/kg
1.69 See Table 1 7440-43-9 Cadmium (Diet)mg/kg
20.1 See Table 1 16065-83-1 Chromium(III), Insoluble Salts mg/kg
0.547 See Table 1 18540-29-9 Chromium(VI)mg/kg
7.84 See Table 1 7440-50-8 Copper mg/kg
9350 See Table 1 7439-89-6 Iron mg/kg
68.5 See Table 1 7439-92-1 ~Lead and Compounds mg/kg
39.1 See Table 1 7439-96-5 Manganese (Non-diet)mg/kg
0.53 See Table 1 7439-97-6 ~Mercury (elemental)mg/kg
0.0084 See Table 1 79-20-9 Methyl Acetate mg/kg
0.0657 See Table 1 78-93-3 Methyl Ethyl Ketone (2-Butanone)mg/kg
0.399 See Table 1 75-09-2 Methylene Chloride mg/kg
4.83 See Table 1 7440-02-0 Nickel Soluble Salts mg/kg
0.0549 See Table 1 109-66-0 Pentane, n-mg/kg
0.0293 See Table 1 12672-29-6 ~Aroclor 1248 mg/kg
0.0721 See Table 1 11097-69-1 ~Aroclor 1254 mg/kg
1.1 See Table 1 7782-49-2 Selenium mg/kg
0.354 See Table 1 7440-22-4 Silver mg/kg
0.677 See Table 1 7440-28-0 Thallium (Soluble Salts)mg/kg
67.2 See Table 1 7440-66-6 Zinc and Compounds mg/kg
Input Form 2A
Soil Exposure Point Concentration Table
Description of Exposure Point Concentration Selection:
Exposure point concentrations are the maximum concentration for each detected compound listed in the risk calculator.
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Description of Exposure Point Concentration Selection:
Exposure Point
Concentration (ug/L)Notes:CAS Number Chemical Units
27.8 See Table 2 67-64-1 Acetone ug/L
0.82 See Table 2 7440-38-2 Arsenic, Inorganic ug/L
0.57 See Table 2 7440-43-9 Cadmium (Diet)ug/L
2.3 See Table 2 16065-83-1 Chromium(III), Insoluble Salts ug/L
115 See Table 2 7440-50-8 Copper ug/L
1.4 See Table 2 123-91-1 Dioxane, 1,4-ug/L
6.7 See Table 2 124-04-9 Hexanedioic Acid ug/L
1090 See Table 2 7439-89-6 Iron ug/L
66.5 See Table 2 67-63-0 Isopropanol ug/L
2.2 See Table 2 7439-92-1 ~Lead and Compounds ug/L
91.7 See Table 2 7439-96-5 Manganese (Diet)ug/L
4.9 See Table 2 7440-02-0 Nickel Soluble Salts ug/L
8500 See Table 2 14797-55-8 Nitrate ug/L
0.02 See Table 2 206-44-0 ~Fluoranthene ug/L
0.011 See Table 2 91-57-6 ~Methylnaphthalene, 2-ug/L
0.8 See Table 2 7782-49-2 Selenium ug/L
0.54 See Table 2 108-88-3 Toluene ug/L
135 See Table 2 7440-66-6 Zinc and Compounds ug/L
Input Form 2B
Groundwater Exposure Point Concentration Table
Exposure point concentrations are the maximum concentration for each detected compound listed in the risk calculator.
North Carolina DEQ Risk Calculator
Exposure Point Concentrations Input Form 2C
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Surface Water Exposure Point Concentration Table
Description of Exposure Point Concentration Selection:
Exposure Point
Concentration
(ug/L)
Notes:CAS Number Chemical Units
0.35 See Table 3 7440-38-2 Arsenic, Inorganic ug/L
0.0545 See Table 3 18540-29-9 Chromium(VI)ug/L
0.47 See Table 3 7440-50-8 Copper ug/L
2.9 See Table 3 106-46-7 Dichlorobenzene, 1,4-ug/L
2120 See Table 3 7439-89-6 Iron ug/L
0.17 See Table 3 7439-92-1 ~Lead and Compounds ug/L
132 See Table 3 7439-96-5 Manganese (Diet)ug/L
0.3 See Table 3 7440-02-0 Nickel Soluble Salts ug/L
260 See Table 3 14797-55-8 Nitrate ug/L
0.089 See Table 3 7782-49-2 Selenium ug/L
1.6 See Table 3 7440-66-6 Zinc and Compounds ug/L
Exposure point concentrations are the maximum concentration for each detected compound listed in the risk calculator.
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Description of Exposure Point Concentration Selection:
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Exposure Point
Concentration
(ug/m3)
Notes:CAS Number Chemical Units
49 See Table 4 67-64-1 Acetone ug/m3
0.92 See Table 4 71-43-2 Benzene ug/m3
10.8 See Table 4 75-27-4 Bromodichloromethane ug/m3
20.6 See Table 4 75-15-0 Carbon Disulfide ug/m3
2.07 See Table 4 108-90-7 Chlorobenzene ug/m3
243 See Table 4 67-66-3 Chloroform ug/m3
1.81 See Table 4 74-87-3 Chloromethane ug/m3
239 See Table 4 75-71-8 Dichlorodifluoromethane ug/m3
4.84 See Table 4 156-59-2 Dichloroethylene, 1,2-cis-ug/m3
2.03 See Table 4 156-60-5 Dichloroethylene, 1,2-trans-ug/m3
2.4 See Table 4 123-91-1 Dioxane, 1,4-ug/m3
1.47 See Table 4 100-41-4 Ethylbenzene ug/m3
6.55 See Table 4 109-99-9 ~Tetrahydrofuran ug/m3
1.1 See Table 4 142-82-5 Heptane, N-ug/m3
29.9 See Table 4 110-54-3 Hexane, N-ug/m3
34.9 See Table 4 67-63-0 Isopropanol ug/m3
7.7 See Table 4 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
12.3 See Table 4 75-09-2 Methylene Chloride ug/m3
3.27 See Table 4 115-07-1 Propylene ug/m3
5.19 See Table 4 100-42-5 Styrene ug/m3
132 See Table 4 127-18-4 Tetrachloroethylene ug/m3
4.52 See Table 4 108-88-3 Toluene ug/m3
5.8 See Table 4 76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-ug/m3
2.93 See Table 4 71-55-6 Trichloroethane, 1,1,1-ug/m3
7.13 See Table 4 79-01-6 Trichloroethylene ug/m3
142 See Table 4 75-69-4 Trichlorofluoromethane ug/m3
36.6 See Table 4 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
7.56 See Table 4 108-67-8 Trimethylbenzene, 1,3,5-ug/m3
8.77 See Table 4 1330-20-7 Xylenes ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Exposure point concentrations are the maximum concentration for each detected compound listed in the risk calculator.
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil 7.9E-06 1.4E+00 YES
Groundwater Use*1.9E-05 9.2E-01 NO
Soil 1.5E-06 1.1E-01 NO
Groundwater Use*3.8E-06 1.5E-01 NO
Construction Worker Soil 4.0E-07 5.7E-01 NO
Soil 4.4E-06 7.2E-01 NO
Surface Water*1.7E-06 5.2E-02 NO
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 6.5E-05 3.7E-01 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 5.0E-06 3.0E-02 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not complete
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Resident Soil
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
* - Note that inhalation on this calculator refers to outdoor inhalation of volatiles and particulates, not indoor inhalation associated with vapor intrusion.
CAS #Chemical Name:
Ingestion
Concentration
(mg/kg)
Dermal
Concentration
(mg/kg)
Inhalation
Concentration
(mg/kg)*
Ingestion
Carcinogenic
Risk
Dermal
Carcinogenic
Risk
Inhalation
Carcinogenic
Risk*
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Hazard
Quotient
Inhalation
Hazard
Quotient*
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 0.249 0.249 0.249 3.5E-06 5.9E-07 4.1E-06
7440-36-0 Antimony (metallic)0.482 0.482 0.482 1.5E-02 7.7E-11 1.5E-02
7440-38-2 Arsenic, Inorganic 3.84 3.84 3.84 5.0E-06 7.0E-07 2.9E-13 5.7E-06 9.8E-02 1.2E-02 1.2E-08 1.1E-01
7440-41-7 Beryllium and compounds 0.691 0.691 0.691 2.9E-14 2.9E-14 4.4E-03 1.6E-09 4.4E-03
7440-43-9 Cadmium (Diet)1.69 1.69 1.69 5.4E-14 5.4E-14 2.2E-02 2.1E-03 8.1E-09 2.4E-02
16065-83-1 Chromium(III), Insoluble Salts 20.1 20.1 20.1 1.7E-04 1.7E-04
18540-29-9 Chromium(VI)0.547 0.547 0.547 1.8E-06 2.3E-12 1.8E-06 2.3E-03 2.6E-10 2.3E-03
7440-50-8 Copper 7.84 7.84 7.84 2.5E-03 2.5E-03
7439-89-6 Iron 9350 9350 9350 1.7E-01 1.7E-01
7439-92-1 ~Lead and Compounds 68.5 68.5 68.5 <SL**<SL**<SL**
7439-96-5 Manganese (Non-diet)39.1 39.1 39.1 2.1E-02 3.7E-08 2.1E-02
7439-97-6 ~Mercury (elemental)0.53 0.53 0.53 1.1E-01 1.1E-01
79-20-9 Methyl Acetate 0.0084 0.0084 0.0084 1.1E-07 1.1E-07
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.0657 0.0657 0.0657 1.4E-06 9.6E-07 2.4E-06
75-09-2 Methylene Chloride 0.399 0.399 0.399 5.2E-09 3.0E-10 5.5E-09 8.5E-04 4.9E-05 9.0E-04
7440-02-0 Nickel Soluble Salts 4.83 4.83 4.83 2.2E-14 2.2E-14 3.1E-03 2.6E-09 3.1E-03
109-66-0 Pentane, n-0.0549 0.0549 0.0549 4.0E-06 4.0E-06
12672-29-6 ~Aroclor 1248 0.0293 0.0293 0.0293 8.4E-08 3.3E-08 2.6E-08 1.4E-07
11097-69-1 ~Aroclor 1254 0.0721 0.0721 0.0721 2.1E-07 8.2E-08 3.8E-08 3.3E-07 4.6E-02 1.5E-02 6.1E-02
7782-49-2 Selenium 1.1 1.1 1.1 2.8E-03 2.6E-12 2.8E-03
7440-22-4 Silver 0.354 0.354 0.354 9.1E-04 9.1E-04
7440-28-0 Thallium (Soluble Salts)0.677 0.677 0.677 8.7E-01 8.7E-01
7440-66-6 Zinc and Compounds 67.2 67.2 67.2 2.9E-03 2.9E-03
Cumulative:7.9E-06 1.4E+00
Output Form 2A
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate cancer risk or hazard quotient. Lead concentrations are compared to the EPA screening level
of 400 mg/kg for residential soil.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Resident Groundwater Use
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
* - Note that inhalation on this calculator refers to inhalation associated with tapwater use, not inhalation associated with vapor intrusion from subsurface groundwater sources.
CAS #Chemical Name:
Ingestion
Concentration
(ug/L)
Dermal
Concentration
(ug/L)
Inhalation
Concentration
(ug/L)*
Ingestion
Carcinogenic
Risk
Dermal
Carcinogenic
Risk
Inhalation
Carcinogenic
Risk*
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Hazard
Quotient
Inhalation
Hazard
Quotient*
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 27.8 27.8 27.8 1.5E-03 6.3E-06 4.3E-04 2.0E-03
7440-38-2 Arsenic, Inorganic 0.82 0.82 0.82 1.6E-05 8.4E-08 1.6E-05 1.4E-01 6.0E-04 1.4E-01
7440-43-9 Cadmium (Diet)0.57 0.57 0.57 2.8E-02 2.8E-02
16065-83-1 Chromium(III), Insoluble Salts 2.3 2.3 2.3 7.6E-05 2.6E-05 1.0E-04
7440-50-8 Copper 115 115 115 1.4E-01 6.3E-04 1.4E-01
123-91-1 Dioxane, 1,4-1.4 1.4 1.4 1.8E-06 6.2E-09 1.2E-06 3.0E-06 2.3E-03 7.3E-06 2.2E-02 2.5E-02
124-04-9 Hexanedioic Acid 6.7 6.7 6.7 1.7E-04 6.2E-07 1.7E-04
7439-89-6 Iron 1090 1090 1090 7.8E-02 3.4E-04 7.8E-02
67-63-0 Isopropanol 66.5 66.5 66.5 1.7E-03 1.0E-05 1.6E-01 1.6E-01
7439-92-1 ~Lead and Compounds 2.2 2.2 2.2 <SL**<SL**<SL**
7439-96-5 Manganese (Diet)91.7 91.7 91.7 3.3E-02 3.3E-02
7440-02-0 Nickel Soluble Salts 4.9 4.9 4.9 1.2E-02 2.7E-04 1.2E-02
14797-55-8 Nitrate 8500 8500 8500 2.6E-01 1.2E-03 2.7E-01
206-44-0 ~Fluoranthene 0.02 0.02 0.02 2.5E-05 2.5E-05
91-57-6 ~Methylnaphthalene, 2-0.011 0.011 0.011 1.4E-04 1.7E-04 3.1E-04
7782-49-2 Selenium 0.8 0.8 0.8 8.0E-03 3.5E-05 8.0E-03
108-88-3 Toluene 0.54 0.54 0.54 3.4E-04 1.0E-04 5.2E-05 4.9E-04
7440-66-6 Zinc and Compounds 135 135 135 2.2E-02 5.9E-05 2.2E-02
Cumulative:1.9E-05 9.2E-01
Output Form 2B
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate cancer risk or hazard quotient. Lead concentrations are compared to the EPA Action Level of
15 μg/L.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Non-Residential Worker Soil
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
* - Note that inhalation on this calculator refers to outdoor inhalation of volatiles and particulates, not indoor inhalation associated with vapor intrusion.
CAS #Chemical Name:
Ingestion
Concentration
(mg/kg)
Dermal
Concentration
(mg/kg)
Inhalation
Concentration
(mg/kg)*
Ingestion
Carcinogenic
Risk
Dermal
Carcinogenic
Risk
Inhalation
Carcinogenic
Risk
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Hazard
Quotient
Inhalation
Hazard
Quotient
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 0.249 0.249 0.249 2.4E-07 1.4E-07 3.8E-07
7440-36-0 Antimony (metallic)0.482 0.482 0.482 1.0E-03 1.8E-11 1.0E-03
7440-38-2 Arsenic, Inorganic 3.84 3.84 3.84 1.1E-06 2.2E-07 6.7E-14 1.3E-06 6.6E-03 1.4E-03 2.9E-09 8.0E-03
7440-41-7 Beryllium and compounds 0.691 0.691 0.691 6.7E-15 6.7E-15 3.0E-04 3.9E-10 3.0E-04
7440-43-9 Cadmium (Diet)1.69 1.69 1.69 1.2E-14 1.2E-14 1.4E-03 2.4E-04 1.9E-09 1.7E-03
16065-83-1 Chromium(III), Insoluble Salts 20.1 20.1 20.1 1.1E-05 1.1E-05
18540-29-9 Chromium(VI)0.547 0.547 0.547 8.4E-08 1.9E-13 8.4E-08 1.6E-04 6.2E-11 1.6E-04
7440-50-8 Copper 7.84 7.84 7.84 1.7E-04 1.7E-04
7439-89-6 Iron 9350 9350 9350 1.1E-02 1.1E-02
7439-92-1 ~Lead and Compounds 68.5 68.5 68.5 <SL**<SL**<SL**
7439-96-5 Manganese (Non-diet)39.1 39.1 39.1 1.4E-03 8.9E-09 1.4E-03
7439-97-6 ~Mercury (elemental)0.53 0.53 0.53 2.6E-02 2.6E-02
79-20-9 Methyl Acetate 0.0084 0.0084 0.0084 7.2E-09 7.2E-09
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.0657 0.0657 0.0657 9.4E-08 2.3E-07 3.2E-07
75-09-2 Methylene Chloride 0.399 0.399 0.399 2.4E-10 2.5E-11 2.7E-10 5.7E-05 1.2E-05 6.9E-05
7440-02-0 Nickel Soluble Salts 4.83 4.83 4.83 5.1E-15 5.1E-15 2.1E-04 6.1E-10 2.1E-04
109-66-0 Pentane, n-0.0549 0.0549 0.0549 9.6E-07 9.6E-07
12672-29-6 ~Aroclor 1248 0.0293 0.0293 0.0293 1.8E-08 1.1E-08 5.9E-09 3.4E-08
11097-69-1 ~Aroclor 1254 0.0721 0.0721 0.0721 4.4E-08 2.6E-08 8.8E-09 7.9E-08 3.1E-03 1.8E-03 4.9E-03
7782-49-2 Selenium 1.1 1.1 1.1 1.9E-04 6.3E-13 1.9E-04
7440-22-4 Silver 0.354 0.354 0.354 6.1E-05 6.1E-05
7440-28-0 Thallium (Soluble Salts)0.677 0.677 0.677 5.8E-02 5.8E-02
7440-66-6 Zinc and Compounds 67.2 67.2 67.2 1.9E-04 1.9E-04
Cumulative:1.5E-06 1.1E-01
Output Form 2C
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate cancer risk or hazard quotient. Lead concentrations are compared to the EPA screening level of 800
mg/kg for commercial/industrial soil.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Non-Residential Worker Groundwater Use
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
* - Note that inhalation on this calculator refers to inhalation associated with tapwater use, not inhalation associated with vapor intrusion from subsurface groundwater sources.
CAS #Chemical Name:
Ingestion
Concentration
(ug/L)
Dermal
Concentration
(ug/L)
Inhalation
Concentration
(ug/L)*
Ingestion
Carcinogenic
Risk
Dermal
Carcinogenic
Risk
Inhalation
Carcinogenic
Risk
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Hazard
Quotient
Inhalation
Hazard
Quotient
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 27.8 27.8 27.8 2.2E-04 3.0E-06 1.0E-04 3.2E-04
7440-38-2 Arsenic, Inorganic 0.82 0.82 0.82 3.1E-06 5.0E-08 3.2E-06 1.9E-02 3.1E-04 2.0E-02
7440-43-9 Cadmium (Diet)0.57 0.57 0.57 4.1E-03 4.1E-03
16065-83-1 Chromium(III), Insoluble Salts 2.3 2.3 2.3 1.1E-05 1.3E-05 2.4E-05
7440-50-8 Copper 115 115 115 2.0E-02 3.2E-04 2.1E-02
123-91-1 Dioxane, 1,4-1.4 1.4 1.4 3.6E-07 3.6E-09 2.9E-07 6.4E-07 3.3E-04 3.4E-06 5.3E-03 5.7E-03
124-04-9 Hexanedioic Acid 6.7 6.7 6.7 2.4E-05 2.8E-07 2.4E-05
7439-89-6 Iron 1090 1090 1090 1.1E-02 1.8E-04 1.1E-02
67-63-0 Isopropanol 66.5 66.5 66.5 2.4E-04 4.9E-06 3.8E-02 3.8E-02
7439-92-1 ~Lead and Compounds 2.2 2.2 2.2 <SL**<SL**<SL**
7439-96-5 Manganese (Diet)91.7 91.7 91.7 4.7E-03 4.7E-03
7440-02-0 Nickel Soluble Salts 4.9 4.9 4.9 1.7E-03 1.4E-04 1.9E-03
14797-55-8 Nitrate 8500 8500 8500 3.8E-02 6.0E-04 3.8E-02
206-44-0 ~Fluoranthene 0.02 0.02 0.02 3.6E-06 3.6E-06
91-57-6 ~Methylnaphthalene, 2-0.011 0.011 0.011 2.0E-05 7.8E-05 9.7E-05
7782-49-2 Selenium 0.8 0.8 0.8 1.1E-03 1.8E-05 1.2E-03
108-88-3 Toluene 0.54 0.54 0.54 4.8E-05 4.7E-05 1.2E-05 1.1E-04
7440-66-6 Zinc and Compounds 135 135 135 3.2E-03 3.0E-05 3.2E-03
Cumulative:3.8E-06 1.5E-01
Output Form 2D
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate cancer risk or hazard quotient. Lead concentrations are compared to the EPA Action Level of 15 μg/L.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Construction Worker Soil
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
* - Note that inhalation on this calculator refers to outdoor inhalation of volatiles and particulates, not indoor inhalation associated with vapor intrusion.
CAS #Chemical Name:
Ingestion
Concentration
(mg/kg)
Dermal
Concentration
(mg/kg)
Inhalation
Concentration
(mg/kg)*
Ingestion
Carcinogenic
Risk
Dermal
Carcinogenic
Risk
Inhalation
Carcinogenic
Risk
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Hazard
Quotient
Inhalation
Hazard
Quotient
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 0.249 0.249 0.249 3.7E-07 2.1E-06 2.5E-06
7440-36-0 Antimony (metallic)0.482 0.482 0.482 3.6E-03 1.1E-04 3.7E-03
7440-38-2 Arsenic, Inorganic 3.84 3.84 3.84 1.4E-07 2.2E-08 5.1E-08 2.1E-07 2.3E-02 3.6E-03 5.8E-02 8.4E-02
7440-41-7 Beryllium and compounds 0.691 0.691 0.691 5.1E-09 5.1E-09 4.1E-04 7.8E-03 8.2E-03
7440-43-9 Cadmium (Diet)1.69 1.69 1.69 9.4E-09 9.4E-09 1.0E-02 1.3E-03 3.8E-02 4.9E-02
16065-83-1 Chromium(III), Insoluble Salts 20.1 20.1 20.1 3.9E-05 9.0E-04 9.4E-04
18540-29-9 Chromium(VI)0.547 0.547 0.547 1.1E-08 1.4E-07 1.5E-07 3.2E-04 4.1E-04 7.3E-04
7440-50-8 Copper 7.84 7.84 7.84 2.3E-03 2.3E-03
7439-89-6 Iron 9350 9350 9350 3.9E-02 3.9E-02
7439-92-1 ~Lead and Compounds 68.5 68.5 68.5 <SL**<SL**<SL**
7439-96-5 Manganese (Non-diet)39.1 39.1 39.1 4.8E-03 1.8E-01 1.8E-01
7439-97-6 ~Mercury (elemental)0.53 0.53 0.53 1.3E-01 1.3E-01
79-20-9 Methyl Acetate 0.0084 0.0084 0.0084 2.5E-08 3.7E-05 3.7E-05
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.0657 0.0657 0.0657 9.7E-08 1.9E-05 1.9E-05
75-09-2 Methylene Chloride 0.399 0.399 0.399 3.2E-11 2.6E-11 5.8E-11 2.0E-05 1.8E-04 2.0E-04
7440-02-0 Nickel Soluble Salts 4.83 4.83 4.83 3.9E-09 3.9E-09 7.1E-04 5.4E-03 6.1E-03
109-66-0 Pentane, n-0.0549 0.0549 0.0549 2.6E-06 2.6E-06
12672-29-6 ~Aroclor 1248 0.0293 0.0293 0.0293 2.4E-09 1.1E-09 1.2E-09 4.6E-09
11097-69-1 ~Aroclor 1254 0.0721 0.0721 0.0721 5.8E-09 2.6E-09 1.8E-09 1.0E-08 7.1E-03 3.2E-03 1.0E-02
7782-49-2 Selenium 1.1 1.1 1.1 6.5E-04 1.2E-05 6.6E-04
7440-22-4 Silver 0.354 0.354 0.354 2.1E-04 2.1E-04
7440-28-0 Thallium (Soluble Salts)0.677 0.677 0.677 5.0E-02 5.0E-02
7440-66-6 Zinc and Compounds 67.2 67.2 67.2 6.6E-04 6.6E-04
Cumulative:4.0E-07 5.7E-01
Output Form 2E
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate cancer risk or hazard quotient. Lead concentrations are compared to the EPA screening level of 800 mg/kg
for commercial/industrial soil.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Recreator/Trespasser Soil Output Form 2F
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
* - Note that inhalation on this calculator refers to outdoor inhalation of volatiles and particulates, not indoor inhalation associated with vapor intrusion.
Receptor Type:Recreator
CAS #Chemical Name:
Ingestion
Concentration
(mg/kg)
Dermal
Concentration
(mg/kg)
Inhalation
Concentration
(mg/kg)*
Ingestion
Carcinogenic
Risk
Dermal
Carcinogenic
Risk
Inhalation
Carcinogenic
Risk
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Hazard
Quotient
Inhalation
Hazard
Quotient
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 0.249 0.249 0.249 2.0E-06 2.7E-08 2.0E-06
7440-36-0 Antimony (metallic)0.482 0.482 0.482 8.6E-03 3.6E-12 8.6E-03
7440-38-2 Arsenic, Inorganic 3.84 3.84 3.84 2.8E-06 3.9E-07 1.4E-14 3.2E-06 5.5E-02 6.5E-03 5.7E-10 6.1E-02
7440-41-7 Beryllium and compounds 0.691 0.691 0.691 1.4E-15 1.4E-15 2.5E-03 7.7E-11 2.5E-03
7440-43-9 Cadmium (Diet)1.69 1.69 1.69 2.5E-15 2.5E-15 1.2E-02 1.1E-03 3.7E-10 1.3E-02
16065-83-1 Chromium(III), Insoluble Salts 20.1 20.1 20.1 9.5E-05 9.5E-05
18540-29-9 Chromium(VI)0.547 0.547 0.547 9.9E-07 1.0E-13 9.9E-07 1.3E-03 1.2E-11 1.3E-03
7440-50-8 Copper 7.84 7.84 7.84 1.4E-03 1.4E-03
7439-89-6 Iron 9350 9350 9350 9.5E-02 9.5E-02
7439-92-1 ~Lead and Compounds 68.5 68.5 68.5 <SL**<SL**<SL**
7439-96-5 Manganese (Non-diet)39.1 39.1 39.1 1.2E-02 1.7E-09 1.2E-02
7439-97-6 ~Mercury (elemental)0.53 0.53 0.53 5.0E-03 5.0E-03
79-20-9 Methyl Acetate 0.0084 0.0084 0.0084 6.0E-08 6.0E-08
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.0657 0.0657 0.0657 7.8E-07 4.5E-08 8.2E-07
75-09-2 Methylene Chloride 0.399 0.399 0.399 2.9E-09 1.4E-11 2.9E-09 4.7E-04 2.3E-06 4.8E-04
7440-02-0 Nickel Soluble Salts 4.83 4.83 4.83 1.0E-15 1.0E-15 1.7E-03 1.2E-10 1.7E-03
109-66-0 Pentane, n-0.0549 0.0549 0.0549 1.9E-07 1.9E-07
12672-29-6 ~Aroclor 1248 0.0293 0.0293 0.0293 4.7E-08 1.8E-08 1.2E-09 6.7E-08
11097-69-1 ~Aroclor 1254 0.0721 0.0721 0.0721 1.2E-07 4.6E-08 1.8E-09 1.6E-07 2.6E-02 8.5E-03 3.4E-02
7782-49-2 Selenium 1.1 1.1 1.1 1.6E-03 1.2E-13 1.6E-03
7440-22-4 Silver 0.354 0.354 0.354 5.0E-04 5.0E-04
7440-28-0 Thallium (Soluble Salts)0.677 0.677 0.677 4.8E-01 4.8E-01
7440-66-6 Zinc and Compounds 67.2 67.2 67.2 1.6E-03 1.6E-03
Cumulative:4.4E-06 7.2E-01
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate cancer risk or hazard quotient. Lead concentrations are compared to the EPA screening level of 400
mg/kg for residential soil.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Recreator/Trespasser Surface Water
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
Receptor Type:Recreator
CAS #Chemical Name:
Ingestion
Concentration
(ug/L)
Dermal
Concentration
(ug/L)
Ingestion
Carcinogenic
Risk
Dermal Contact
Carcinogenic
Risk
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Contact
Hazard
Quotient
Calculated
Non-
Carcinogenic
Hazard
Quotient
7440-38-2 Arsenic, Inorganic 0.35 0.35 5.9E-07 6.0E-08 6.5E-07 1.0E-02 5.3E-04 1.1E-02
18540-29-9 Chromium(VI)0.0545 0.0545 1.3E-07 7.8E-07 9.1E-07 1.6E-04 6.6E-04 8.2E-04
7440-50-8 Copper 0.47 0.47 1.0E-04 5.3E-06 1.1E-04
106-46-7 Dichlorobenzene, 1,4-2.9 2.9 1.8E-08 1.3E-07 1.5E-07 3.7E-04 1.4E-03 1.8E-03
7439-89-6 Iron 2120 2120 2.7E-02 1.4E-03 2.8E-02
7439-92-1 ~Lead and Compounds 0.17 0.17
7439-96-5 Manganese (Diet)132 132 8.3E-03 8.3E-03
7440-02-0 Nickel Soluble Salts 0.3 0.3 1.3E-04 3.4E-05 1.7E-04
14797-55-8 Nitrate 260 260 1.4E-03 7.4E-05 1.5E-03
7782-49-2 Selenium 0.089 0.089 1.6E-04 8.1E-06 1.7E-04
7440-66-6 Zinc and Compounds 1.6 1.6 4.7E-05 1.5E-06 4.9E-05
Cumulative:1.7E-06 5.2E-02
Output Form 2G
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 49 1.47 -6.5E+03 4.5E-05
71-43-2 Benzene 0.92 0.0276 3.6E-01 6.3E+00 7.7E-08 8.8E-04
75-27-4 Bromodichloromethane 10.8 0.324 7.6E-02 -4.3E-06
75-15-0 Carbon Disulfide 20.6 0.618 -1.5E+02 8.5E-04
108-90-7 Chlorobenzene 2.07 0.0621 -1.0E+01 1.2E-03
67-66-3 Chloroform 243 7.29 1.2E-01 2.0E+01 6.0E-05 7.1E-02
74-87-3 Chloromethane 1.81 0.0543 -1.9E+01 5.8E-04
75-71-8 Dichlorodifluoromethane 239 7.17 -2.1E+01 6.9E-02
156-59-2 Dichloroethylene, 1,2-cis-4.84 0.1452 --
156-60-5 Dichloroethylene, 1,2-trans-2.03 0.0609 --
123-91-1 Dioxane, 1,4-2.4 0.072 5.6E-01 6.3E+00 1.3E-07 2.3E-03
100-41-4 Ethylbenzene 1.47 0.0441 1.1E+00 2.1E+02 3.9E-08 4.2E-05
109-99-9 ~Tetrahydrofuran 6.55 0.1965 -4.2E+02 9.4E-05
142-82-5 Heptane, N-1.1 0.033 -8.3E+01 7.9E-05
110-54-3 Hexane, N-29.9 0.897 -1.5E+02 1.2E-03
67-63-0 Isopropanol 34.9 1.047 -4.2E+01 5.0E-03
78-93-3 Methyl Ethyl Ketone (2-Butanone)7.7 0.231 -1.0E+03 4.4E-05
75-09-2 Methylene Chloride 12.3 0.369 1.0E+02 1.3E+02 3.6E-09 5.9E-04
115-07-1 Propylene 3.27 0.0981 -6.3E+02 3.1E-05
100-42-5 Styrene 5.19 0.1557 -2.1E+02 1.5E-04
127-18-4 Tetrachloroethylene 132 3.96 1.1E+01 8.3E+00 3.7E-07 9.5E-02
108-88-3 Toluene 4.52 0.1356 -1.0E+03 2.6E-05
76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-5.8 0.174 -1.0E+03 3.3E-05
71-55-6 Trichloroethane, 1,1,1-2.93 0.0879 -1.0E+03 1.7E-05
79-01-6 Trichloroethylene 7.13 0.2139 4.8E-01 4.2E-01 4.5E-07 1.0E-01
75-69-4 Trichlorofluoromethane 142 4.26 --
95-63-6 Trimethylbenzene, 1,2,4-36.6 1.098 -1.3E+01 1.8E-02
108-67-8 Trimethylbenzene, 1,3,5-7.56 0.2268 -1.3E+01 3.6E-03
1330-20-7 Xylenes 8.77 0.2631 -2.1E+01 2.5E-03
Cumulative:6.5E-05 3.7E-01
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Resident, Non-Residential, & Recreator
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 49 0.49 -2.7E+04 3.6E-06
71-43-2 Benzene 0.92 0.0092 1.6E+00 2.6E+01 5.9E-09 7.0E-05
75-27-4 Bromodichloromethane 10.8 0.108 3.3E-01 -3.3E-07
75-15-0 Carbon Disulfide 20.6 0.206 -6.1E+02 6.7E-05
108-90-7 Chlorobenzene 2.07 0.0207 -4.4E+01 9.5E-05
67-66-3 Chloroform 243 2.43 5.3E-01 8.6E+01 4.6E-06 5.7E-03
74-87-3 Chloromethane 1.81 0.0181 -7.9E+01 4.6E-05
75-71-8 Dichlorodifluoromethane 239 2.39 -8.8E+01 5.5E-03
156-59-2 Dichloroethylene, 1,2-cis-4.84 0.0484 --
156-60-5 Dichloroethylene, 1,2-trans-2.03 0.0203 --
123-91-1 Dioxane, 1,4-2.4 0.024 2.5E+00 2.6E+01 9.8E-09 1.8E-04
100-41-4 Ethylbenzene 1.47 0.0147 4.9E+00 8.8E+02 3.0E-09 3.4E-06
109-99-9 ~Tetrahydrofuran 6.55 0.0655 -1.8E+03 7.5E-06
142-82-5 Heptane, N-1.1 0.011 -3.5E+02 6.3E-06
110-54-3 Hexane, N-29.9 0.299 -6.1E+02 9.8E-05
67-63-0 Isopropanol 34.9 0.349 -1.8E+02 4.0E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)7.7 0.077 -4.4E+03 3.5E-06
75-09-2 Methylene Chloride 12.3 0.123 1.2E+03 5.3E+02 1.0E-10 4.7E-05
115-07-1 Propylene 3.27 0.0327 -2.6E+03 2.5E-06
100-42-5 Styrene 5.19 0.0519 -8.8E+02 1.2E-05
127-18-4 Tetrachloroethylene 132 1.32 4.7E+01 3.5E+01 2.8E-08 7.5E-03
108-88-3 Toluene 4.52 0.0452 -4.4E+03 2.1E-06
76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-5.8 0.058 -4.4E+03 2.6E-06
71-55-6 Trichloroethane, 1,1,1-2.93 0.0293 -4.4E+03 1.3E-06
79-01-6 Trichloroethylene 7.13 0.0713 3.0E+00 1.8E+00 2.4E-08 8.1E-03
75-69-4 Trichlorofluoromethane 142 1.42 --
95-63-6 Trimethylbenzene, 1,2,4-36.6 0.366 -5.3E+01 1.4E-03
108-67-8 Trimethylbenzene, 1,3,5-7.56 0.0756 -5.3E+01 2.9E-04
1330-20-7 Xylenes 8.77 0.0877 -8.8E+01 2.0E-04
Cumulative:5.0E-06 3.0E-02
All concentrations are in ug/m3
Output Form 3E
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Exposure Unit #1 - Trespasser
North Carolina Department of Environmental Quality
Risk Calculator
Old Richmond County Landfill
Rockingham, Richmond County, North Carolina
Pre-Regulatory Landfill Unit
NONCD0000594
July 2020
May 2020 EPA RSL Table
12/7/2020
Prepared By:ATC Associates of North Carolina, P.C.
2727 E. Millbrook Road, Ste 121, Raleigh, NC 27604
Pre-Regulatory Landfill Unit
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration to Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: Exposure Unit #1 - Trespasser
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: Exposure Unit #1 - Trespasser
Default Value
Recreator Trespasser
Lifetime (LT) (years)70 NA NA
Averaging Time (AT) (days/yr)365 NA NA
Body Weight (BW) (kg)15 NA NA
Exposure Duration 0-2 (ED) (yr)2 NA NA
Exposure Duration 2-6 (ED) (yr)4 NA NA
Exposure Frequency (EF) (d/yr)195 NA NA
Exposure Time (ET) (hr)2 NA NA
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA NA
Soil Adherence Factor (AF) (mg/cm2)0.2 NA NA
Soil Ingestion Rate (IRS) (mg/day)200 NA NA
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA NA
Water Ingestion Rate (IRW) (L/hr)0.124 NA NA
Water Exposure Time (ETevent) (hr/event)2 NA NA
Water Event Frequency (EV) (events/day)1 NA NA
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 45
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 0
Exposure Frequency (EF) (d/yr)195 90 90
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.2
Soil Ingestion Rate (IRS) (mg/day)100 200 200
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.071
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Child
User Defined Adult
North Carolina DEQ Risk Calculator
Contaminant Migration Parameters

Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Parameter Default Value Site Specific
Value Justification
Distance to Protection of
Groundwater Point of
Exposure (POEgw) (feet)
0 0
Distance to Protection of
Surface Water Point of
Exposure (POEsw) (feet)
0 0
Depth to Base of Affected
Soils (ds) (cm)1244 183 ATC used the maximum soil cover depth within the landfill unit (6
feet, 182.88 cm) as the depth of the affected soils.
Length of Affected Soil
Parallel to Assumed GW
Flow Direction (L) (cm)
Site-specific
value required
Areal extent of soil
contamination
range 0.5-500 (As) (acres)
0.5 4.9 ATC used the entire waste disposal unit as the areal extent of soil
contamination
Fraction of vegetative cover
(V) (unitless)0.5 1.0 The entire waste disposal unit is covered with vegetation.
0.15 (soil to
outdoor air
pathway)
0.07 This value is based on the average of all laboratory reported moisture
content values for soil samples collected at the site.
0.3 (soil to
groundwater
pathway)
0.3
0.28 (soil to
outdoor air
pathway)
0.36 This value is based on the total soil porosity minus the water filled soil
porosity.
0.13 (soil to
groundwater
pathway)
0.13
Provide justification for the contaminant migration parameters used.
Water Filled Soil Porosity
(θw) (unitless)
Air Filled Soil Porosity (θa)
(unitless)
Input Form 1C
North Carolina DEQ Risk Calculator
Contaminant Migration Parameters

Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Parameter Default Value Site Specific
Value Justification
Provide justification for the contaminant migration parameters used.
Input Form 1C
Total Soil Porosity (n)
(unitless)0.43 0.43
Total porosity has not been measured at this site. The soil is
predominantly classified as a silty sand. Therefore, ATC used a
published value of fine-grained sand (McWorter and Sunada, 1997.)
Dry Soil Bulk Density (ρb)
(g/cm3)1.5 1.66
Dry bulk density has not been measured at this site. The soil is
predominantly classified as a silty sand. Therefore, ATC used a
published value sand (US EPA, 2004).
Net Infiltration Rate (I)
(cm/yr)66 66
0.006 (soil to
outdoor air
pathway)
0.006 The default value was used as fraction organic carbon has not been
measured at the site.
0.002 (soil
leaching to
groundwater
pathway)
0.002
Aquifer Hydraulic
Conductivity (K) (cm/d)
Site-specific
value required
Hydraulic Gradient (i)
(unitless)
Site-specific
value required
Average Groundwater
Temperature (Tgw) (°C)25 25
Aquifer Thickness (da) (cm)Site-specific
value required
Groundwater Source
Thickness (Sd) (cm)
Site-specific
value required
Groundwater Source Width
(Sw) (cm)
Site-specific
value required
Fraction Organic Carbon
(foc) (unitless)
North Carolina DEQ Risk Calculator
Contaminant Migration Parameters

Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Parameter Default Value Site Specific
Value Justification
Provide justification for the contaminant migration parameters used.
Input Form 1C
Plume Thickness at GW/SW
Discharge (δsw) (cm)
Site-specific
value required
Plume Width at GW/SW
Discharge (Wgwsw) (cm)
Site-specific
value required
Surface Water Flowrate at
GW/SW Discharge (Qsw)
(cm3/d)
Site-specific
value required
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Exposure Point
Concentration
(mg/kg)
Notes:CAS Number Chemical Units
0.249 See Table 1 67-64-1 Acetone mg/kg
0.482 See Table 1 7440-36-0 Antimony (metallic)mg/kg
3.84 See Table 1 7440-38-2 Arsenic, Inorganic mg/kg
0.691 See Table 1 7440-41-7 Beryllium and compounds mg/kg
1.69 See Table 1 7440-43-9 Cadmium (Diet)mg/kg
20.1 See Table 1 16065-83-1 Chromium(III), Insoluble Salts mg/kg
0.547 See Table 1 18540-29-9 Chromium(VI)mg/kg
7.84 See Table 1 7440-50-8 Copper mg/kg
9350 See Table 1 7439-89-6 Iron mg/kg
68.5 See Table 1 7439-92-1 ~Lead and Compounds mg/kg
39.1 See Table 1 7439-96-5 Manganese (Non-diet)mg/kg
0.53 See Table 1 7439-97-6 ~Mercury (elemental)mg/kg
0.0084 See Table 1 79-20-9 Methyl Acetate mg/kg
0.0657 See Table 1 78-93-3 Methyl Ethyl Ketone (2-Butanone)mg/kg
0.399 See Table 1 75-09-2 Methylene Chloride mg/kg
4.83 See Table 1 7440-02-0 Nickel Soluble Salts mg/kg
0.0549 See Table 1 109-66-0 Pentane, n-mg/kg
0.0293 See Table 1 12672-29-6 ~Aroclor 1248 mg/kg
0.0721 See Table 1 11097-69-1 ~Aroclor 1254 mg/kg
1.1 See Table 1 7782-49-2 Selenium mg/kg
0.354 See Table 1 7440-22-4 Silver mg/kg
0.677 See Table 1 7440-28-0 Thallium (Soluble Salts)mg/kg
67.2 See Table 1 7440-66-6 Zinc and Compounds mg/kg
Input Form 2A
Soil Exposure Point Concentration Table
Description of Exposure Point Concentration Selection:
Exposure point concentrations are the maximum concentration for each detected compound listed in the risk calculator.
North Carolina DEQ Risk Calculator
Exposure Point Concentrations Input Form 2C
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Surface Water Exposure Point Concentration Table
Description of Exposure Point Concentration Selection:
Exposure Point
Concentration
(ug/L)
Notes:CAS Number Chemical Units
0.35 See Table 3 7440-38-2 Arsenic, Inorganic ug/L
0.0545 See Table 3 18540-29-9 Chromium(VI)ug/L
0.47 See Table 3 7440-50-8 Copper ug/L
2.9 See Table 3 106-46-7 Dichlorobenzene, 1,4-ug/L
2120 See Table 3 7439-89-6 Iron ug/L
0.17 See Table 3 7439-92-1 ~Lead and Compounds ug/L
132 See Table 3 7439-96-5 Manganese (Diet)ug/L
0.3 See Table 3 7440-02-0 Nickel Soluble Salts ug/L
260 See Table 3 14797-55-8 Nitrate ug/L
0.089 See Table 3 7782-49-2 Selenium ug/L
1.6 See Table 3 7440-66-6 Zinc and Compounds ug/L
Exposure point concentrations are the maximum concentration for each detected compound listed in the risk calculator.
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil 8.9E-07 1.2E-01 NO
Surface Water*3.2E-07 6.2E-03 NO
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not complete
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Recreator/Trespasser Soil Output Form 2F
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
* - Note that inhalation on this calculator refers to outdoor inhalation of volatiles and particulates, not indoor inhalation associated with vapor intrusion.
Receptor Type:Trespasser
CAS #Chemical Name:
Ingestion
Concentration
(mg/kg)
Dermal
Concentration
(mg/kg)
Inhalation
Concentration
(mg/kg)*
Ingestion
Carcinogenic
Risk
Dermal
Carcinogenic
Risk
Inhalation
Carcinogenic
Risk
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Hazard
Quotient
Inhalation
Hazard
Quotient
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 0.249 0.249 0.249 3.0E-07 1.3E-08 3.2E-07
7440-36-0 Antimony (metallic)0.482 0.482 0.482 1.3E-03 1.6E-12 1.3E-03
7440-38-2 Arsenic, Inorganic 3.84 3.84 3.84 5.4E-07 1.6E-07 2.4E-15 7.0E-07 8.4E-03 2.5E-03 2.6E-10 1.1E-02
7440-41-7 Beryllium and compounds 0.691 0.691 0.691 2.4E-16 2.4E-16 3.8E-04 3.5E-11 3.8E-04
7440-43-9 Cadmium (Diet)1.69 1.69 1.69 4.4E-16 4.4E-16 1.9E-03 4.5E-04 1.7E-10 2.3E-03
16065-83-1 Chromium(III), Insoluble Salts 20.1 20.1 20.1 1.5E-05 1.5E-05
18540-29-9 Chromium(VI)0.547 0.547 0.547 1.3E-07 2.0E-14 1.3E-07 2.0E-04 5.6E-12 2.0E-04
7440-50-8 Copper 7.84 7.84 7.84 2.1E-04 2.1E-04
7439-89-6 Iron 9350 9350 9350 1.5E-02 1.5E-02
7439-92-1 ~Lead and Compounds 68.5 68.5 68.5 <SL**<SL**<SL**
7439-96-5 Manganese (Non-diet)39.1 39.1 39.1 1.8E-03 8.0E-10 1.8E-03
7439-97-6 ~Mercury (elemental)0.53 0.53 0.53 2.3E-03 2.3E-03
79-20-9 Methyl Acetate 0.0084 0.0084 0.0084 9.2E-09 9.2E-09
78-93-3 Methyl Ethyl Ketone (2-Butanone)0.0657 0.0657 0.0657 1.2E-07 2.1E-08 1.4E-07
75-09-2 Methylene Chloride 0.399 0.399 0.399 3.7E-10 2.7E-12 3.8E-10 7.3E-05 1.0E-06 7.4E-05
7440-02-0 Nickel Soluble Salts 4.83 4.83 4.83 1.8E-16 1.8E-16 2.6E-04 5.5E-11 2.6E-04
109-66-0 Pentane, n-0.0549 0.0549 0.0549 8.6E-08 8.6E-08
12672-29-6 ~Aroclor 1248 0.0293 0.0293 0.0293 9.2E-09 7.7E-09 2.1E-10 1.7E-08
11097-69-1 ~Aroclor 1254 0.0721 0.0721 0.0721 2.3E-08 1.9E-08 3.2E-10 4.2E-08 4.0E-03 3.3E-03 7.3E-03
7782-49-2 Selenium 1.1 1.1 1.1 2.4E-04 5.6E-14 2.4E-04
7440-22-4 Silver 0.354 0.354 0.354 7.8E-05 7.8E-05
7440-28-0 Thallium (Soluble Salts)0.677 0.677 0.677 7.4E-02 7.4E-02
7440-66-6 Zinc and Compounds 67.2 67.2 67.2 2.5E-04 2.5E-04
Cumulative:8.9E-07 1.2E-01
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate cancer risk or hazard quotient. Lead concentrations are compared to the EPA screening level of 400
mg/kg for residential soil.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Direct Contact - Recreator/Trespasser Surface Water
Version Date: July 2020
Basis: May 2020 EPA RSL Table
Site ID: NONCD0000594
Exposure Unit ID: Exposure Unit #1 - Trespasser
Receptor Type:Trespasser
CAS #Chemical Name:
Ingestion
Concentration
(ug/L)
Dermal
Concentration
(ug/L)
Ingestion
Carcinogenic
Risk
Dermal Contact
Carcinogenic
Risk
Calculated
Carcinogenic
Risk
Ingestion
Hazard
Quotient
Dermal
Contact
Hazard
Quotient
Calculated
Non-
Carcinogenic
Hazard
Quotient
7440-38-2 Arsenic, Inorganic 0.35 0.35 5.8E-08 1.6E-08 7.5E-08 9.1E-04 2.5E-04 1.2E-03
18540-29-9 Chromium(VI)0.0545 0.0545 9.1E-09 2.0E-07 2.1E-07 1.4E-05 3.1E-04 3.3E-04
7440-50-8 Copper 0.47 0.47 9.1E-06 2.5E-06 1.2E-05
106-46-7 Dichlorobenzene, 1,4-2.9 2.9 1.7E-09 3.6E-08 3.8E-08 3.2E-05 6.7E-04 7.1E-04
7439-89-6 Iron 2120 2120 2.4E-03 6.5E-04 3.0E-03
7439-92-1 ~Lead and Compounds 0.17 0.17
7439-96-5 Manganese (Diet)132 132 7.3E-04 7.3E-04
7440-02-0 Nickel Soluble Salts 0.3 0.3 1.2E-05 1.6E-05 2.8E-05
14797-55-8 Nitrate 260 260 1.3E-04 3.5E-05 1.6E-04
7782-49-2 Selenium 0.089 0.089 1.4E-05 3.8E-06 1.8E-05
7440-66-6 Zinc and Compounds 1.6 1.6 4.1E-06 6.9E-07 4.8E-06
Cumulative:3.2E-07 6.2E-03
Output Form 2G
North Carolina DEQ Risk Calculator

APPENDIX B
Certification