WS-6265_23626_CA_MRP_20220413

SUBSEQUENT GROUNDWATER MONITORING
REPORT
M&P Grocery (Incident #23626)
7712 NC Highway 194
Lansing, Ashe County, North Carolina
April 13, 2022
Terracon Project No. 75207123

Prepared for:
North Carolina Department of Environmental Quality
Division of Waste Management
Raleigh, North Carolina

Prepared by:
Terracon Consultants, Inc.
Greensboro, North Carolina

Terracon Consultants, Inc. 7327-G West friendly Avenue Greensboro, NC 27410
P 336-3365-8135 F 336-365-7020 terracon.com
April 13, 2022

Mr. Herb Berger, L.G.
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Email: [e-mail]

Re: Groundwater Monitoring Report
M&P Grocery
7712 NC Highway 194
Lansing, Ashe County, North Carolina
UST Incident Number: 23626
Terracon Project No. 75207123

Dear Mr. Berger:

Terracon Consultants, Inc. (Terracon) is pleased to submit this Groundwater Monitoring Report for
the above referenced property. This report has been prepared in general accordance with North
Carolina Department of Environmental Quality (NCDEQ), UST Section Guidelines for Assessment
and Corrective Action for UST Releases, dated January 19, 2021 and Task Authorization No. TA-02,
approved on February 7, 2022.

If you have any questions regarding this report or the assessment activities, please contact us at
336-365-8135.

Sincerely,
Terracon Consultants, Inc.

F. Christopher Driscoll, P.G. M. Neal McElveen, P.E.
Project Geologist Principal

Enclosures

Table of Contents
A. SITE INFORMATION.............................................................................................. 1
B. EXECUTIVE SUMMARY .......................................................................................... 2
C. SITE HISTORY AND CHARACTERIZATION ........................................................... 4
C.1 Site Setting...................................................................................................................................... 4
C.2 Release Summary .......................................................................................................................... 4
C.3 Previous Investigations ................................................................................................................. 4
C.4 Water Supply Wells ........................................................................................................................ 6
C.5 Surface Water ................................................................................................................................. 7
C.6 Land Use Information .................................................................................................................... 7
D. ASSESSMENT INFORMATION ............................................................................... 7
D.1 Site Geology and Hydrogeology ................................................................................................... 7
D.2 Sampling Activities ........................................................................................................................ 8
D.2.1 Light Nonaqueous Phase Liquid (LNAPL) Evaluation ................................................................... 8
D.2.2 Groundwater Sampling Activities .................................................................................................. 8
D.3 Analytical Results .......................................................................................................................... 9
E. AQUIFER TESTING ............................................................................................... 10
F. GROUNDWATER MODELING ............................................................................... 11
G. CONCLUSIONS AND RECOMMENDATIONS ...................................................... 14

EXHIBITS
Exhibit 1: Topographic Map
Exhibit 2: Site Diagram
Exhibit 3: Water Supply Well Location Map
Exhibit 4: Groundwater Elevation Map (March 2022)
Exhibit 5: Groundwater Analytical Results Map (March 2022)
Exhibit 6: Mann Kendall Analysis – Benzene
Exhibit 7: Mann Kendall Analysis – Toluene
Exhibit 8: Mann Kendall Analysis – Ethylbenzene
Exhibit 9: Mann Kendall Analysis – Xylenes (Total)
Exhibit 10: Mann Kendall Analysis – Naphthalene
Exhibit 11: Mann Kendall Analysis – 1,2,4-Trimethylbenzene

TABLES
Table 1: Water Supply Well Information
Table 2: Monitoring Well Construction Information and Groundwater Elevations
Table 3: Summary of Groundwater Analytical Results

APPENDICES
Appendix A: Field Notes and Photograph Log
Appendix B: Laboratory Analytical Results and Chain of Custody Form
Appendix C: AQTESOLV Results
Appendix D: RBCA Toolkit Model Results
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

Responsive ■ Resourceful ■ Reliable 1

SUBSEQUENT GROUNDWATER MONITORING REPORT
A. SITE INFORMATION
Date of Report: April 13, 2022
NCDEQ Incident No: 23626
Facility ID: Unknown
Site Name: M&P Grocery
Site Location: 7712 NC Highway 194
Lansing, Ashe County, North Carolina 28643
Latitude: N 36.48274
Longitude: W -81.50241
UST Owner/Operator: Phillips 66/Colvard Oil Company (Bankrupt)
Current Property Owner: Mitchell Roark and Jessica Stuart
3681 Rich Hill Rd
Creston, NC 28615
Current Property
Occupant: Vacant

Consultant: Terracon Consultants, Inc. (Contact: Chris Driscoll)
7327-G W. Friendly Ave
Greensboro, North Carolina 27410
[phone]
Laboratory: Pace Analytical National Center for Testing and Innovation
12065 Lebanon Road
Mount Juliet, Tennessee 37122
[phone]
Release Information: Release Date: September 2001
Estimated Quantity: Unknown
Source: two USTs of unknown size and contents
Cause of Release: UST System
Currently Active Tanks: None

M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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I, F. Christopher Driscoll, a Licensed Geologist for Terracon Consultants, Inc., do certify that the
information contained in this report is correct and accurate to the best of my knowledge.

F. Christopher Driscoll
NC License No. 2695

Terracon Consultants, Inc. is licensed to practice geology/engineering in North Carolina. The
certification number of the corporation is F-0869.
B. EXECUTIVE SUMMARY
The purpose of this report is to evaluate the current status of the groundwater quality at the former
M&P Grocery site (Incident No. 23626) by sampling monitoring wells MW-1, MW-2, MW-3, MW-4
and WSW-1. Terracon completed this report to summarize the findings of assessment activities
performed on March 3, 2022. The release incident is situated on the property located at 7712 NC
Highway 194 in Lansing, Ashe County, North Carolina in an area developed with rural residences.
The site is currently occupied by a vacant corner store.

Terracon mobilized to the site on March 3, 2022, to conduct groundwater sampling activities.
Terracon gauged the groundwater elevations in monitoring wells MW-1 through MW-4. Depth to
groundwater in the monitoring wells ranged from approximately 3.30 feet below top of casing (btoc)
in well MW-1 to 6.90 feet btoc in well MW-4. Based on top of casing elevations, groundwater flow is
to the southwest.

The groundwater sample from MW-2 contained ethylbenzene, n-propylbenzene, 1,2,4-
trimethylbenzene, and total xylenes were reported at concentrations exceeding the 2L Standards,
with other constituents below the 2L Standards but above method detection limits (MDLs). The
groundwater sample from MW-3 contained n-propylbenzene and 1,2,4-trimethylbenzene were
reported at concentrations exceeding the 2L Standards, with other constituents below the 2L
Standards but above MDLs. Petroleum constituents were not reported at concentrations exceeding
the MDLs in wells MW-1 and MW-4.

While analytical results from this sampling event indicate an increase in contaminant levels in wells
MW-2 and MW-3 from the July 2021 sampling event. However, the Mann-Kendall statistical analysis
of benzene, toluene, ethylbenzene, xylene (BTEX), naphthalene, and 1,2,4-trimethylbenzene
historical concentrations at the site indicates that the long-term trends for these contaminants have
been stable, decreasing, or exhibiting no trend. Contaminant levels in wells MW-1 and MW-4 have
continued to remain below MDLs.
Based on information obtained during the completion of our assessment activities, Terracon
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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provides the following conclusions and findings.

LNAPL was not observed in the monitoring wells.
Petroleum constituents were not reported above Gross Contamination Levels (GCLs).
Ethylbenzene, n-propylbenzene, 1,2,4-trimethylbenznene, and total xylenes were reported in
well MW-2 above the 2L Standards.
N-propylbenzene and 1,2,4-trimethylbenznene were reported in well MW-3 above the 2L
Standards.
Various petroleum constituents were also reported in wells MW-2 and MW-3 at concentrations
below the 2L Standards, but above MDLs.
Petroleum constituents were not reported in the samples from monitoring wells MW-1 and
MW-4 above the method detection limits.
Based on water level measurements, groundwater flow is calculated to be towards the
southwest.
Seven private water-supply wells are reportedly located within 1,000 feet of the source area
that are currently utilized as sources of potable water. One private water supply well has been
previously reported as inactive and is located 50 feet east of the site. Municipal water is not
available to the site or the immediately surrounding properties.
Concentrations of petroleum constituents were reported to have remained stable or decreasing
in the on-site monitoring wells since 2016.
The biodegradation model appears to simulate contaminant transport and degradation
between MW-2 and MW-4 accurately.
It does not appear likely that on-site contaminant concentrations will impact water supply well
WSW-6, or other supply wells located further from the source, in the future.
The potential risk to the North Fork of the New River is similarly low and the calculated
concentrations of pollutants listed under the North Carolina 15A NCAC 02B Water Quality
Standards for Surface Waters (2B Standards) fall significantly under the limits.
Water supply well WSW-1, however, is located close enough to the source area to be
potentially at risk if it either still exists or is activated in the future. As such, the incident may be
eligible for risk-based closure with a deed restriction for groundwater.
Based on the data presented in this monitoring report, Terracon recommends the following activities
be completed at the site.
Determine the status of WSW-1 and abandon it if necessary.
Once water supply well WSW-1 is determined to be abandoned, the incident may be closed
with a Notice of Residual Petroleum (NORP) and a groundwater use restriction.
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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C. SITE HISTORY AND CHARACTERIZATION
The purpose of this report is to evaluate the current status of the groundwater quality at the former
M&P Grocery site. Terracon completed this report to summarize the findings of assessment
activities performed on March 3, 2022 at the former M&P Grocery located at 7712 NC Highway 194
in Lansing, Ashe County, North Carolina (Exhibit 1). This Groundwater Monitoring Report was
prepared for the site in response to a request by the Incident Manager, Mr. Herb Berger with the
NCDEQ Division of Waste Management, Trust Fund Branch.

The groundwater monitoring report was prepared in general accordance with 15A NCAC 2L .0115
regulations and the NCDEQ Underground Storage Tank (UST) Section Assessment Guidelines,
dated January 19, 2021, under the supervision of Mr. Chris Driscoll, a North Carolina licensed
geologist (North Carolina License No. 2695).

C.1 Site Setting

The M&P Grocery site is located at 7712 NC Highway 194 in Lansing, Ashe County. The site is
located in an area developed with rural residences and is developed with a corner store that is
currently unoccupied. The site is depicted in Exhibit 2.

C.2 Release Summary

According to historical assessment information, two USTs of unknown size and contents were
removed from the property in September 2001. According to a March 14, 2011, Initial Abatement
Report, the tanks were reportedly taken out of service sometime between 1971 and 1986. Upon
removal of the USTs, an NCDEQ representative visited the site and observed that the excavated
soil was discolored and contained a strong petroleum odor. It was also observed that clean soil was
used to backfill the UST excavation.

C.3 Previous Investigations

Force Environmental Service Company (Force) completed a UST Closure Assessment in July 2009,
which included the sampling of a water supply well adjacent to the former UST basin (WSW-1). Four
soil borings were advanced in and around the former UST basin. Soil from the investigation was
analyzed for petroleum constituents, with reported concentrations greater than the Soil-to-Water
Maximum Soil Contaminant Concentrations (MSCCs). Concentrations did not exceed Residential or
Industrial MSCCs. Petroleum constituents in the sample collected from well WSW-1 did not contain
analytes at concentrations exceeding 2L Standards. A Phase I Limited Site Assessment (LSA) was
recommended to identify the extent of the petroleum release in the area of the vicinity of the former
USTs.

A Phase I LSA was performed at the site on November 24, 2009. During the LSA, a soil boring was
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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advanced at the southwest part of the former UST basin. The boring was advanced to 12 feet
below ground surface (bgs) and was converted to a shallow monitoring well (MW-1). Initial sampling
of the monitoring well did not indicate petroleum impact, with the exception of a concentration of
lead, which was below 2L Standards.

On April 15, 2010, a soil investigation was performed at the site to assess the extent of
contamination, which included the advancement of 10 soil borings. Six borings were advanced
approximately five feet outside of the area of the former UST basin and dispenser island. Four
borings were advanced to the west of the UST basin, one boring was advanced southwest of the
former UST basin, and three borings were advanced northwest of the source area. Soils from the
investigation were analyzed for petroleum constituents. One soil sample from the area
approximately five feet beyond the UST basin and dispenser island contained petroleum
hydrocarbon concentrations greater than the Soil-to-Groundwater MSCCs. A groundwater sample
was collected from monitoring well MW-1, and a spring located southeast of the source area which
provides water to the site. The analytical results did not report petroleum constituents at
concentrations exceeding the method detection limits (MDLs) in either water sample.

In February 2011, 138.91 tons of petroleum impacted soil was removed from the area to the west of
the former UST basin, as reported in the previous soil investigation. The excavation area measured
approximately 25 feet by 25 feet, 15 feet deep, and was backfilled with clean sandy clay. The
northern, southern, and western walls of the excavation contained residual petroleum impacts
above Soil-to-Water MSCCs but below the residential and industrial/commercial MSCCs.

On August 25, 2011, monitoring well MW-2 was installed to the southwest of the former UST basin
to a depth of 15 ft bgs. Following the installation of the monitoring well, groundwater sampling of the
two on-site monitoring wells was performed. The groundwater sample collected from well MW-2
contained concentrations of benzene, naphthalene, n-propylbenzene, 1,2,4-trimethylbenzene, total
xylenes, C5-C8 aliphatics and C9-C10 aromatics were detected at concentrations exceeding 2L
Standards in monitoring well MW-2. Petroleum constituents were not detected in the groundwater
sample collected from monitoring well MW-1.

Groundwater monitoring was performed at the site in December 2011, and January 2013, with the
most recent results indicating impact to monitoring well MW-2 with concentrations of benzene,
ethylbenzene, naphthalene, n-propylbenzene, 1,2,4-trimethylbenzene, and total xylenes exceeding
2L Standards. A surface water sample (SW-1) was collected from a drainage feature to the south of
the site building, and a concentration of naphthalene was identified above 2L Standards.

On January 27, 2015, ATC Associates of North Carolina, P.C. (ATC) sampled monitoring wells MW-
1 and MW-2, and a surface water sample from the drainage feature directly behind M&P Grocery
(SW-1). The groundwater analytical results reported concentrations of ethylbenzene, naphthalene,
n-propylbenzene, toluene, 1,2,4-trimethylbenzene, and total xylenes above 2L Standards in
monitoring well MW-2. No additional impact was identified above 2L Standards.
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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On June 17, 2015, ATC installed monitoring well MW-3 to further delineate the groundwater plume.
On June 23, 2015, ATC sampled monitoring wells MW-1, MW-2, and MW-3, and water supply wells
WSW-3, WSW-6, WSW-7, and WSW-8. Laboratory analysis from the groundwater sampling
identified concentrations of petroleum constituents above 2L Standards in MW -2 and MW-3. No
concentrations of petroleum compounds were reported in monitoring well MW-1. Acetone was
detected in each of the water supply wells, which was later identified as an artifact of sample
preservation and not site impact, based on confirmation sampling that was conducted as part of TA-
3.

On March 29, 2016, groundwater samples were collected from monitoring wells MW-1, MW-3 and
MW-4. Monitoring well MW-2 was unable to be sampled due to the presence of an automobile
parked over the well. Concentrations of petroleum compounds were reported above 2L Standards in
monitoring wells MW-3 and MW-4. None of the reported concentrations in well MW-1 exceeded the
2L Standards. ATC also sampled water supply wells WSW-3, WW-5, WSW-6, WSW-7, and WSW-
8 during the March 2016 monitoring event. No petroleum constituents were reported in any of the
water supply wells.

On October 17, 2017, groundwater samples were collected from monitoring wells MW-1, MW-3 and
MW-4. Monitoring well MW-2 was unable to be sampled due to the presence of an automobile
parked over the well. Concentrations of petroleum compounds were reported above 2L Standards in
monitoring wells MW-3 and MW-4. None of the detected concentrations in well MW-1 exceeded the
2L Standards. ATC also sampled water supply wells WSW-3 and WSW-5. No petroleum
constituents were reported in the water supply well samples.

On July 12, 2021, Terracon returned to the site to sample monitoring wells MW-1 through MW-4.
Based on the laboratory analytical results, n-propylbenzene and 1,2,4-trimethylbenzene were
reported at concentrations exceeding the 2L Standards in well MW -3. Various petroleum
constituents were reported in wells MW-2 and MW-3 above the MDLs but below the 2L Standards.
Petroleum constituents were not reported at concentrations exceeding the MDLs in wells MW-1 and
MW-4.

C.4 Water Supply Wells

Based on receptor survey information provided by a previous consultant, eight water supply wells
are located within 1,000 feet of the site. The on-site water supply well (WSW-1) has been reported
as not operational, and the site obtains potable water from a spring (not depicted on the attached
figures) located approximately 600 feet southeast of the source area. The next two nearest wells
(WSW-5 and WSW-6) are located approximately 200 feet to the north and 450 feet to the northwest
of the source area, respectively, and are likely upgradient of the source area based on topography.
Water supply well WSW-3 is located approximately 700 feet west of the source area and is likely
crossgradient of the source based on topography. The other water supply wells are not likely at risk
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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due to the location and distance from the source area. The locations of the water supply wells are
shown on Exhibit 3 and water supply well information is provided in Table 1.

C.5 Surface Water

The site is located within the drainage basin for the North Fork of the New River, located
approximately 320 feet southwest of the source area. The North Fork of the New River is depicted
as Class C, High Quality Water. Surface runoff on the site is generally to southeast, toward a
drainage feature behind the on-site building. Surface waters are depicted on Exhibit 1.

C.6 Land Use Information

The site is bound to the north by NC Highway 194 and single-family residences, to the east by a
single-family residence, to the west by commercial development, and to the south by wooded land
and the North Fork of the New River.
D. ASSESSMENT INFORMATION

D.1 Site Geology and Hydrogeology

The following resources were reviewed to evaluate site-specific geological and hydrogeological
characteristics.

Park, Grassy Creek, Warrensville, and Jefferson Quadrangles, North Carolina, USGS 7.5-minute
series topographic maps, dated 1978, 1978, 1966, and 1998, respectively (Exhibit 1).
Geologic Map of North Carolina, dated 1985.
The Geology of the Carolinas, Carolina Geological Society Fiftieth Anniversary Volume, edited by
J. Wright Horton, Jr., and Victor A. Zullo, The University of Tennessee Press, dated 1991.
Soil Survey of Ashe County, North Carolina, US Department of Agriculture, Natural Resources
Conservation Service, Web Soil Survey via the Internet, http://websoilsurvey.nrcs.usda.gov/app/ .

The site is located within the Blue Ridge Physiographic Province which generally consists of tall,
high-relief topography and long northeast to southwest trending ridges with incised creeks and river
channels. According to the geologic map, the site is specifically underlain by bedrock consisting of
biotite granitic gneiss interlayered with amphibolite and calc-silicate rock.

In-place chemical and physical weathering of parent rocks typically form residual soils in the Blue
Ridge region. Weathering is facilitated by the presence of fractures, joints, and less resistant
minerals in the rock. Saprolite derived from the underlying bedrock is generally thinner in the Blue
Ridge than in the Piedmont. Furthermore, soils on mountain slopes are moved down-slope by water
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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and gravity more readily than in the more moderately sloped Piedmont Physiographic Province,
resulting in relatively thicker colluvial deposits in valleys. According to available excavation records
for the site, soils encountered consisted of sandy clay.

In much of the Blue Ridge, groundwater generally occurs in pore spaces within soils and in the
structural features present in the underlying rock (i.e. joints, fractures, and faults). Recharge to the
water table is primarily by precipitation infiltrating the surficial, unsaturated soils (vadose zone) and
percolating downward under the influence of gravity to the water table (saturated zone). Typically,
the water table is not a level surface, but a subdued reflection of the land surface. The depth to the
water table is not consistent and is dependent upon several factors that include the amount of
rainfall, permeability of the soil, the extent of fracturing in the underlying rock and the influences of
groundwater pumping. Groundwater typically flows in directions perpendicular to lines of equal head
and under the influence of gravity, migrates to discharge points such as surface water features, the
toes of slopes or natural springs.

Please note that fluctuations in the depth of the water table can be expected depending on
variations in precipitation, surface water run-off and other factors not evident at the time of our
subsurface exploration. Normally, the highest levels of the water table occur in late winter and spring
and the lowest levels occur in the late summer and fall. Based on groundwater elevation
measurements taken on March 3, 2022, groundwater is estimated to flow to the southwest.

D.2 Sampling Activities

Terracon mobilized to the site on March 3, 2022, to conduct groundwater sampling activities. Four
monitoring wells (MW-1, MW-2, MW-3 and MW-4) and one water supply well (WSW-1) were
scheduled for sampling. Prior to mobilizing to the site, an unsuccessful phone call attempt was
made to the site property owner and the owner of the property south of the site to determine to
status of water supply well WSW-1. An additional attempt was made on-site to contact each
property owner, which was unsuccessful. During the March 2022 site visit, a mound of dirt and grass
was observed in the location of water supply well WSW-1 and it was unclear whether the well had
been properly abandoned (Appendix A). After removing the well caps from each monitoring well,
three Provectus ORS Sleeves were removed from wells MW-1 through MW-3.

D.2.1 Light Nonaqueous Phase Liquid (LNAPL) Evaluation

Terracon gauged the wells for LNAPL using a decontaminated oil-water interface probe for the four
monitoring wells. LNAPL was not observed in the four monitoring wells during the March 3, 2022
sampling activities.

D.2.2 Groundwater Sampling Activities

After gauging the well for LNAPL, Terracon then gauged the monitoring wells using the electric
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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water level meter with accuracy of 1/100th of a foot to collect groundwater elevation data in
monitoring wells MW-1 through MW-4. Depth to groundwater in the monitoring wells ranged from
approximately 3.30 feet btoc in well MW-1 to 6.90 feet btoc in well MW-4. Based on top of casing
elevations, groundwater flow is to the southwest. The approximate locations of the wells are shown
on the Site Diagram (Exhibit 2). A groundwater elevation map depicting groundwater flow contours
and direction is shown on Exhibit 4. Current and historical groundwater elevation measurements
are provided in Table 3.

Prior to sampling, the wells were purged with disposable bailers. Approximately three well volumes
were purged prior to sampling. Field parameters consisting of pH, temperature, and conductivity
were measured at each of the well locations. The wells were then allowed to recharge to 90% of the
original volume, and a groundwater sample was collected from each well in general accordance with
NCDEQ sampling guidelines.

The groundwater samples and an equipment blank were placed in laboratory-supplied glassware,
labeled and stored in an ice-packed cooler. The samples, along with chain-of-custody
documentation, were delivered to Pace Analytical Services, Inc. in Mount Juliet, Tennessee for
analysis of volatile organic compounds (VOCs) by Standard Method 6200B, including methyl tert-
butyl ether (MTBE), ethylene dibromide (EDB), and isopropyl ether (IPE).

D.3 Analytical Results

The groundwater sample from MW-2 contained ethylbenzene (1,250 µg/L), n-propylbenzene (85.6
µg/L), 1,2,4-trimethylbenzene (649 µg/L), and total xylenes (4,257.8 µg/L) were reported at
concentrations exceeding the 2L Standards, with other constituents below the 2L Standards but
above MDLs.

The groundwater sample from MW-3 contained n-propylbenzene (108 µg/L) and 1,2,4-
trimethylbenzene (628 µg/L) were reported at concentrations exceeding the 2L Standards, with other
constituents below the 2L Standards but above MDLs.

Petroleum constituents were not reported at concentrations exceeding the MDLs in wells MW-1 and
MW-4.

While analytical results from this sampling event indicate an increase in contaminant levels in wells
MW-2 and MW-3 from the July 2021 sampling event, historically the contaminant concentrations at
the site are either stable, decreasing, or exhibit no trend. The long-term trends of contaminant levels
at the site are explained further by Mann Kendall Statistical analysis in Section F. Contaminant
levels in wells MW-1 and MW-4 have continued to remain below MDLs.

The groundwater analytical results from the monitoring wells are summarized in Table 2. The
analytical results are also depicted on Exhibit 5. Copies of the laboratory analytical reports are
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

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provided in Appendix A.

E. AQUIFER TESTING
To evaluate aquifer properties (i.e., aquifer permeability and the potential suitability of contaminant
migration), slug tests were conducted on March 3, 2022 at four on-site monitoring well locations
(MW-1 through MW-4) by introducing a solid slug of known volume into each well and measuring
the resulting change in head following the introduction (i.e., “slug-in”). A Level Troll 700 pressure
transducer was used to monitor the change in head within the wells. The tests continued until water
levels recovered to at least 95 percent of the initial static level within a reasonable time period. After
the water level had returned to the approximate static level, the slug was removed and the resulting
change in head was also monitored (i.e. “slug-out” test). Hydraulic conductivity was then estimated
from slug test results using AQTESOLV Pro software. Terracon’s field notes are provided in
Appendix A. Aquifer slug test summary reports and AQTESOLV data reports are provided in
Appendix C.

Time versus water displacement data collected from slug-in (falling head) and slug-out (rising head)
tests conducted at monitoring wells MW-1, MW-2, MW-3, and MW-4 were analyzed using the Bower
and Rice (1976) Slug Test Solution for unconfined aquifers. The falling and rising head slug tests
yielded the following hydraulic conductivities (K):

Slug Test K (feet/minute)
MW-1 (slug-in) 1.55 x 10-4
MW-1 (slug-out) 1.13 x 10-4
MW-2 (slug-in) 2.19 x 10-4
MW-2 (slug-out) 1.37 x 10-4
MW-3 (slug-in) 2.19 x 10-4
MW-3 (slug-out) 3.48 x 10-4
MW-4 (slug-in) 1.55 x 10-4
MW-4 (slug-out) 1.55 x 10-4

These K values correspond to a range of 59.4 feet per year (ft/yr) to 182.9 ft/yr with an average of
98.6 ft/yr. This range of hydraulic conductivity values falls within the low end of the published range
for fine sands in Domenico and Schwartz, 1990. Previous soil borings conducted at the site noted
the dominant soil lithology to be gray to bluish gray sandy clay. While it appears that the calculated
hydraulic conductivities are more consistent with a more dominantly sandy lithology than clayey
lithology, the calculated values are broadly consistent with mixed sand/clay lithologies. Given the
consistency seen in slug-in and slug-out tests performed at four separate wells, the shapes of the
displacement versus time curves (see Appendix C), and the agreement seen in fate and transport
results with real world concentration data using the average calculated hydraulic conductivity (see
below), the calculated hydraulic conductivities appear representative of on-site subsurface
conditions.
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

Responsive ■ Resourceful ■ Reliable 11

F. GROUNDWATER MODELING
Terracon conducted a fate and transport evaluation of petroleum constituents detected in the on-site
monitoring wells to determine the potential for the constituents to migrate toward nearby receptors.
The receptors analyzed were WSW-1 and WSW-6 which are located approximately 50 and 200 feet
from the source area, respectively. Well WSW-1 is located up-gradient of the source area, whereas
WSW-6 is located cross-gradient. The RBCA Tool Kit for Chemical Releases® Version 2.6 (RBCA
Toolkit) used to perform the fate and transport modeling does not have a directional input; as such,
the model results evaluating risk to WSW-1 are equally valid for WSW-6. Terracon utilized available
site-specific data (contaminant concentrations, hydraulic gradient, and hydraulic conductivity).

Site Specific Model Inputs (RBCA Tool Kit)
Terracon utilized site-specific hydraulic conductivity data from the slug testing performed by
Terracon in March 2022 to simulate natural attenuation and transport of the contaminant plume. The
model simulations to evaluate solute transport were completed using the RBCA Toolkit. The
average hydraulic conductivity was estimated at 98.6 ft/yr for the site. The average hydraulic
gradient, 0.0423 ft/ft, was estimated for the site based on the historic groundwater elevations of
MW-1 and MW-4 (average from the last five sampling events dating back to 2016). Using an
estimated porosity of 0.32, the seepage velocity used by the model was calculated as approximately
13 feet per year. Site specific data for soil bulk density, the partition coefficient, and fraction organic
carbon were not available so the default values were used in the model simulation.

The depth to water in the source area has historically ranged from approximately 3 to 7 feet bls. The
elevation difference between the site (2,680 ft) and the North Fork of the New River (2,640 ft) to the
southwest is approximately 40 ft. Based on the above, the plume thickness at the source area was
estimated to be approximately 47 feet by assuming that the aquifer extends an additional 10 feet
below the creek elevation (from 40 to 50 feet bls, consistent with the creek elevation) prior to the
occurrence of bedrock.

Based on Mann-Kendall statistical analysis of benzene, toluene, ethylbenzene, xylene (BTEX),
naphthalene, and 1,2,4-trimethylbenzene (see Exhibits 6 through 12), contaminant concentrations at
the site are either stable, decreasing, or exhibit no trend. As such, a model simulating
biodegradation for contaminants of concern was selected. According to the RBCA Tool Kit®,
biodegradation is simulated as a first-order decay process. For the biodegradation model, the most
conservative half-lives for each constituent published in The Handbook of Environmental
Degradation Rates (Howard et al., 1991) were utilized.

Initial Model Calibration (Modeling Transport from MW-2 to MW-4)
Prior to evaluating transport from the source area to the selected receptors, Terracon utilized site-
specific concentration data from MW-2 and MW-4 to calibrate the desired model inputs (see above)
and evaluate how well the model can reproduce real world data. Concentrations of benzene,
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

Responsive ■ Resourceful ■ Reliable 12
toluene, ethylbenzene, xylene (BTEX), naphthalene, and 1,2,4-trimethylbenzene detected within
MW-2 during the August 2011 sampling event were used as beginning concentrations.
Contaminant concentrations at MW-4, located 80 feet directly down-gradient from MW-2, were
calculated using the model. After 11 years, the calculated BTEX concentrations are consistent with
the concentrations detected within MW-4 during the March 2022 sampling event:

MW-4 Concentrations: Fate and Transport Model Results
vs. March 2022 Analytical Data
Constituent RBCA-Calculated
Concentrations
March 2022
Benzene 0.53 <1.00
Toluene 2.9 x 10-10 <1.00
Ethylbenzene 0.17 <1.00
Total Xylenes 3.3 <2.00
Naphthalene 1.5 x 10-7 <5.00
1,2,4 -Trimethylbenzene 1.2 x 10-13 <1.00
*Concentrations are given in μg/L

Based on this above-described calibration, the average hydraulic conductivity calculated from the
slug testing and the choice of a 1st order decay model appear appropriate. The site-specific
parameters used for the models and a discussion of the results are presented below.

Fate and Transport Model
Concentrations of toluene, ethylbenzene, total xylenes, and 1,2,4-trimethylbenzene identified within
MW-2 during the March 2022 sampling event were used as the contaminant concentrations in the
source area to populate the biodegradation model. Benzene and naphthalene were not included as
contaminants of concern in the model as concentrations during the March 2022 sampling event
were below the MDLs. The data and inputs used for the model are described above and are also
indicated on the input screen included in Appendix C.

Fate and Transport Model Results (Source Area to WSW-1)

Well WSW-1 is located approximately 50 feet up-gradient of the source area and has been reported
in a past receptor survey as being inactive. However, because it is unclear whether this well has
been abandoned, a biodegradation model was generated to evaluate contamination risk. The
biodegradation model indicates that the steady-state concentrations of the selected constituents
(toluene, ethylbenzene, total xylenes, and 1,2,4-trimethylbenzene) calculated to exist at the point of
exposure (POE) range from 30 µg/L (total xylenes) to 3.4 x 10-11 µg/L (1,2,4-trimethylbenzene). The
selected constituents of concern are not reported as carcinogenic and the hazard index (1.1 x 10-2)
for the point of exposure is lower than NCDEQ’s acceptable risk tolerance of 1 µg/L. In addition, the
calculated concentration of toluene is (1.2 x 10-7 μg/L) which is significantly below the 2B Standards
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

Responsive ■ Resourceful ■ Reliable 13
of 11 μg/L for Class C freshwater.

As the plume appears to be either stable or shrinking, the biodegradation model calculates the
following concentrations to exist at the point of exposure after 20 years:

Calculated Concentrations at WSW-1
Constituent Calculated
Concentrations
After 20 Years
Steady State
Concentrations
Calculated Years
to Reach Steady
State Conditions
Toluene 1.2 x 10-7 1.2 x 10-7 3
Ethylbenzene 1.9 1.9 8
Total Xylenes 30 30 12
1,2,4 -
Trimethylbenzene
3.4 x 10-11 3.4 x 10-11 22
*Concentrations are given in μg/L

Fate and Transport Model Results (Source Area to WSW-6)

Well WSW-6 is located 200 feet cross-gradient of the source area and is currently used for potable
water according the most recent receptor survey. The biodegradation model indicates that the
steady-state concentrations of the selected constituents (toluene, ethylbenzene, total xylenes, and
1,2,4-trimethylbenzene) are calculated to exist at the POE range from 1.3 x 10-2 µg/L (total xylenes)
to 1.9 x 10-24 µg/L (1,2,4-trimethylbenzene). The selected constituents of concern are not reported
as carcinogenic and the hazard index (8.0 x 10-6) for the point of exposure is many orders of
magnitude lower than NCDEQ’s acceptable risk tolerance of 1 µg/L. In addition, the calculated
concentration of toluene is (1.8 x 10-17 μg/L) is significantly below the 2B Standards of 11 μg/L for
Class C freshwater.

As the plume appears to be either stable or shrinking, the biodegradation model calculates the
following concentrations to exist at the point of exposure after 20 years:

Calculated Concentrations at WSW-6
Constituent Calculated
Concentrations
After 20 Years
Steady State
Concentrations
Calculated Years
to Reach Steady
State Conditions
Toluene 1.8 x 10-17 1.8 x 10-17 5
Ethylbenzene 3.4 x 10-4 3.4 x 10-4 14
Total Xylenes 2.4 x 10-2 2.4 x 10-2 17
1,2,4 -
Trimethylbenzene
5.1 x 10-24 5.1 x 10-24 10
*Concentrations are given in μg/L

M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

Responsive ■ Resourceful ■ Reliable 14

Fate and Transport Model Summary

Summaries of the model results are provided in Appendix D. Based on the biodegradation model,
which appears to simulate contaminant transport and degradation between MW -2 and MW-4
accurately, it does not appear likely that the on-site contaminant concentrations will impact water
supply well WSW-6 in the future. The potential risk to the North Fork of the New River (the only
other receptor located within 300 feet and down-gradient of the site) is similarly low as it is located
further from the source area than WSW-6 and the calculated concentrations of pollutants listed
under the NCAC 2B Standards fall significantly under the limits. Further, it can be extrapolated that
any other water supply wells located further from the source area than WSW-6 are at even lower
risk of future impact. Contaminants of concern appear to be either stable or decreasing and did not
exhibit GCL exceedances during this sampling event. Water supply well WSW-1, however, is
located close enough to the source area to be potentially at risk if it either still exists or is activated in
the future. As such, the incident may be eligible for risk-based closure with a deed restriction for
groundwater.
G. CONCLUSIONS AND RECOMMENDATIONS
Based on information obtained during the completion of our assessment activities, Terracon
provides the following conclusions and findings.

LNAPL was not observed in the monitoring wells.
Petroleum constituents were not reported above Gross Contamination Levels (GCLs).
Ethylbenzene, n-propylbenzene, 1,2,4-trimethylbenznene, and total xylenes were reported in
well MW-2 above the 2L Standards.
N-propylbenzene and 1,2,4-trimethylbenznene were reported in well MW-3 above the 2L
Standards.
Various petroleum constituents were also reported in wells MW-2 and MW-3 at concentrations
below the 2L Standards, but above MDLs.
Petroleum constituents were not reported in the samples from monitoring wells MW-1 and
MW-4 above the method detection limits.
Based on water level measurements, groundwater flow is calculated to be towards the
southwest.
Seven private water-supply wells are reportedly located within 1,000 feet of the source area
that are currently utilized as sources of potable water. One private water supply well has been
previously reported as inactive and is located 50 feet east of the site. Municipal water is not
available to the site or the immediately surrounding properties.
M&P Grocery
Lansing, North Carolina
Terracon Project No. 75207123
Incident No. 23626
April 13, 2022

Responsive ■ Resourceful ■ Reliable 15
Concentrations of petroleum constituents were reported to have remained stable or decreasing
in the on-site monitoring wells since 2016.
The biodegradation model appears to simulate contaminant transport and degradation
between MW-2 and MW-4 accurately.
It does not appear likely that on-site contaminant concentrations will impact water supply well
WSW-6, or other supply wells located further from the source, in the future.
The potential risk to the North Fork of the New River is similarly low and the calculated
concentrations of pollutants listed under the 2B Standards fall significantly under the limits.
Water supply well WSW-1, however, is located close enough to the source area to be
potentially at risk if it either still exists or is activated in the future. As such, the incident may be
eligible for risk-based closure with a deed restriction for groundwater.
Based on the data presented in this monitoring report, Terracon recommends the following activities
be completed at the site.
Determine the status of WSW-1 and abandon it if necessary.
Once water supply well WSW-1 is determined to be abandoned, the incident may be closed
with a Notice of Residual Petroleum (NORP) and a groundwater use restriction.

EXHIBITS
TOPOGRAPHIC MAP
M&P Grocery (Incident # 23626)
7712 NC HWY 194
Lansing, Ashe County, NC
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: PARK, NC (1/1/1978), GRASSY CREEK, NC (1/1/1978), WARRENSVILLE, NC (1/1/1966) and JEFFERSON, NC (1/1/1998).
7327 W Friendly Ave Ste G
Greensboro, NC 27410-6253
75207123Project Manager:
Drawn by:
Checked by:
Approved by:
FCD
NM
NM
1”=2,000’
M&P Grocery
2/7/2022
Project No.
Scale:
File Name:
Date:1
ExhibitFCD
APPROXIMATE
SITE BOUNDARY
ED
@A
@A
@A@A
Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,IGN, and the GIS User Community
Legend
@A Monitoring Well
ED Water supply wellSite BoundaryParcels
File Path:
Date:
Project No.
Scale:FCD
FCD
NM
NM
2
PM:
Drawn By:
Checked By:
Approved By:7327-G West Friendly Avenue Greensboro, NC 27410Phone: [phone] Fax: [phone]
75207123 EXHIBITNO.SITE DIAGRAM
3/11/2022
M&P Grocery (Incident No. 23626)7712 NC Highway 194Lansing, Ashe County, NC
FORMER M&P GROCERY
N C H IG H W A Y 1 9 4
MW-1
MW-3
0 40 8020Feet
FORMER UST BASIN
MW-4
SHED
RESIDENCE
WSW-1
1 in = 40 ft
MW-2
M&P Grocery
ED
EDED
ED
ED
ED
ED
ED
Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,IGN, and the GIS User Community
Legend
ED Water supply wellRadiusSite BoundaryParcels
File Path:
Date:
Project No.
Scale:FCD
FCD
NM
NM
3
PM:
Drawn By:
Checked By:
Approved By:7327-G West Friendly Avenue Greensboro, NC 27410Phone: [phone] Fax: [phone]
75207123 EXHIBITNO.WATER SUPPLY WELL LOCATION MAP
3/11/2022
M&P Grocery (Incident No. 23626)7712 NC Highway 194Lansing, Ashe County, NC
WSW-6
N C H IG H W A Y 1 9 4
WSW-3
WSW-5
0 400 800200Feet
WSW-7
WSW-9
WSW-1
1 in = 400 ft
WSW-8
WSW-11
1,000 FEET
500 FEET
M&P Grocery
ED
@A
@A
@A@A
Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,IGN, and the GIS User Community
Legend
@A Monitoring Well
ED Water supply wellFlow DirectionGroundwater CountoursSite BoundaryParcels
File Path:
Date:
Project No.
Scale:FCD
FCD
NM
NM
4
PM:
Drawn By:
Checked By:
Approved By:7327-G West Friendly Avenue Greensboro, NC 27410Phone: [phone] Fax: [phone]
75207123 EXHIBITNO.GROUNDWATER ELEVATION MAP (MARCH 2022)
3/11/2022
M&P Grocery (Incident No. 23626)7712 NC Highway 194Lansing, Ashe County, NC
FORMER M&P GROCERY
N C H IG H W A Y 1 9 4
MW-1(96.70)
MW-3(94.67)
0 40 8020Feet
FORMER UST BASIN
MW-4(88.70)
SHED
RESIDENCE
WSW-1
1 in = 40 ft
96
MW-2(91.54)
949290
M&P Grocery
ED
@A
@A
@A@A
Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID,IGN, and the GIS User Community
Legend
@A Monitoring Well
ED Water supply wellSite BoundaryParcels
File Path:
Date:
Project No.
Scale:FCD
FCD
NM
NM
5
PM:
Drawn By:
Checked By:
Approved By:7327-G West Friendly Avenue Greensboro, NC 27410Phone: [phone] Fax: [phone]
75207123 EXHIBITNO.GROUNDWATER ANALYTICAL RESULTS MAP (MARCH 2022)
3/11/2022
M&P Grocery (Incident No. 23626)7712 NC Highway 194Lansing, Ashe County, NC
FORMER M&P GROCERY
N C H IG H W A Y 1 9 4
MW-1
MW-3
0 40 8020Feet
FORMER UST BASIN
MW-4
SHED
RESIDENCE
WSW-1
1 in = 40 ft
MW-2VOCs by Method 6200Ethylbenzene = 1,250 µg/Ln-Propylbenzene = 85.6 µg/LToluene = 469 µg/L1,2,4-Trimethylbenzene = 649 µg/L1,3,5-Trimethylbenzene = 194 µg/LTotal Xylenes = 4,257.8 µg/L
MW-1VOCs by Method 6200All Constituents = ND
NotesBold indicates concentrations exceeding 2L Standardµg/L = micrograms per literND = Not Detected
MW-2
MW-3VOCs by Method 6200n-Butylbenzene = 16.9 µg/LEthylbenzene = 98.1 µg/LIsopropylbenzene = 28.7 µg/Ln-Propylbenzene = 108 µg/L1,2,4-Trimethylbenzene = 628 µg/L1,3,5-Trimethylbenzene = 201 µg/LXylenes (Total) = 203.2 µg/L
MW-4VOCs by Method 6200All Constituents = ND
M&P Grocery
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/L
Sampling Point ID:MW-2 MW-3 MW-4
Sampling Sampling
Event Date
1 25-Aug-11 6.1 0.5
2 15-Dec-11 11 0.5
3 8-Jan-13 5.8 0.5
4 23-Jun-15 3.8 0.5
5 29-Mar-16 0.5 0.5 0.61
6 17-Oct-17 0.5 0.5 2
7 5-Nov-19 0.5 0.5 0.5
8 12-Jul-21 0.5 0.5 0.5
9 3-Mar-22 0.5 0.5 0.5
10
11
12
13
14
15
16
17
18
19
20Coefficient of Variation:1.16 0.00 0.80
Mann-Kendall Statistic (S):-24 0 -5
Confidence Factor:99.4%46.0%82.1%
Concentration Trend:Decreasing Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend.Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
C. Driscoll
75207123
GSI Environmental Inc., www.gsi-net.com
BENZENE CONCENTRATION (ug/L)
3-Mar-22
M&P Grocery Benzene
0.1
1
10
100
11/10 04/12 08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23Concentration (ug/L)Sampling Date
MW-2
MW-3
MW-4
Exhibit 6: Mann-Kendall Analysis - Benzene
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/L
Sampling Point ID:MW-2 MW-3 MW-4
Sampling Sampling
Event Date
1 25-Aug-11 110
2 15-Dec-11 370
3 8-Jan-13 306
4 23-Jun-15 500 23
5 29-Mar-16 29 840
6 17-Oct-17 17 500
7 5-Nov-19 620 12 84.7
8 12-Jul-21 4.47 2.5 0.5
9 3-Mar-22 469 2.5 0.5
10
11
12
13
14
15
16
17
18
19
20Coefficient of Variation:0.64 0.75 1.31
Mann-Kendall Statistic (S):5 -12 -9
Confidence Factor:71.9%98.2%97.5%
Concentration Trend:No Trend Decreasing Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend.Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
TOLUENE CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
3-Mar-22 75207123
M&P Grocery Toluene
C. Driscoll
0.1
1
10
100
1000
11/10 04/12 08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23Concentration (ug/L)Sampling Date
MW-2
MW-3
MW-4
Exhibit 7: Mann-Kendall Analysis - Toluene
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/L
Sampling Point ID:MW-2 MW-3 MW-4
Sampling Sampling
Event Date
1 25-Aug-11 510
2 15-Dec-11 1300
3 8-Jan-13 644
4 23-Jun-15 620 180
5 29-Mar-16 220 350
6 17-Oct-17 150 240
7 5-Nov-19 999 139 33.8
8 12-Jul-21 11.7 92.4 0.5
9 3-Mar-22 1250 98.1 0.5
10
11
12
13
14
15
16
17
18
19
20Coefficient of Variation:0.60 0.33 1.29
Mann-Kendall Statistic (S):1 -11 -9
Confidence Factor:50.0%97.2%97.5%
Concentration Trend:No Trend Decreasing Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend.Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ETHYLBENZENE CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
3-Mar-22 75207123
M&P Grocery Ethylbenzene
C. Driscoll
0.1
1
10
100
1000
10000
11/10 04/12 08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23Concentration (ug/L)Sampling Date
MW-2
MW-3
MW-4
Exhibit 8: Mann-Kendall Analysis - Ethylbenzene
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/L
Sampling Point ID:MW-2 MW-3 MW-4
Sampling Sampling
Event Date
1 25-Aug-11 1600
2 15-Dec-11 3200
3 8-Jan-13 2134.3
4 23-Jun-15 1930 397
5 29-Mar-16 500 146
6 17-Oct-17 286 466
7 5-Nov-19 3177.9 253.4 36.6
8 12-Jul-21 32.2 61.94 1
9 3-Mar-22 4257.8 203.2 1
10
11
12
13
14
15
16
17
18
19
20Coefficient of Variation:0.59 0.54 1.51
Mann-Kendall Statistic (S):3 -11 -7
Confidence Factor:61.4%97.2%92.1%
Concentration Trend:No Trend Decreasing Prob. Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend.Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
XYLENES (TOTAL) CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
3-Mar-22 75207123
M&P Grocery Xylenes (Total)
C. Driscoll
1
10
100
1000
10000
11/10 04/12 08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23Concentration (ug/L)Sampling Date
MW-2
MW-3
MW-4
Exhibit 9: Mann-Kendall Analysis - Xylenes (Total)
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/L
Sampling Point ID:MW-2 MW-3 MW-4
Sampling Sampling
Event Date
1 25-Aug-11 83
2 15-Dec-11 220
3 8-Jan-13 117
4 23-Jun-15 210 120
5 29-Mar-16 59 160
6 17-Oct-17 69 98
7 5-Nov-19 155 45.4 9.3
8 12-Jul-21 2.5 12 2.5
9 3-Mar-22 12 2.5
10
11
12
13
14
15
16
17
18
19
20Coefficient of Variation:0.63 0.77 1.31
Mann-Kendall Statistic (S):-3 -12 -9
Confidence Factor:64.0%98.2%97.5%
Concentration Trend:Stable Decreasing Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend.Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
NAPHTHALENE CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
3-Mar-22 75207123
M&P Grocery Naphthalene
C. Driscoll
1
10
100
1000
11/10 04/12 08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23Concentration (ug/L)Sampling Date
MW-2
MW-3
MW-4
Exhibit 10: Mann-Kendall Analysis - Naphthalene
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/L
Sampling Point ID:MW-2 MW-3 MW-4
Sampling Sampling
Event Date
1 25-Aug-11 520
2 15-Dec-11 1000
3 8-Jan-13 539
4 23-Jun-15 410 620
5 29-Mar-16 870 840
6 17-Oct-17 740 500
7 5-Nov-19 527 688 84.7
8 12-Jul-21 5.96 426 0.5
9 3-Mar-22 649 628 0.5
10
11
12
13
14
15
16
17
18
19
20Coefficient of Variation:0.57 0.22 1.31
Mann-Kendall Statistic (S):-3 -5 -9
Confidence Factor:61.4%76.5%97.5%
Concentration Trend:Stable Stable Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend.Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
1,2,4-TRIMETHYLBENZENE CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
3-Mar-22 75207123
M&P Grocery 1,2,4-Trimethylbenzene
C. Driscoll
0.1
1
10
100
1000
11/10 04/12 08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23Concentration (ug/L)Sampling Date
MW-2
MW-3
MW-4
Exhibit 11: Mann-Kendall Analysis - 1,2,4-Trimethylbenzene

TABLES
TABLE 1
WATER SUPPLY WELL INFORMATION
M & P Grocery
7712 NC Highway 194
Lansing, Ashe County, North Carolina
NCDEQ Incident #23626
Terracon Project No. 75207123
Well Well Owners / Well Users Property Address Mailing Address
Distance From
Source Area
(ft)
Well Use
(P/I/N)
Ronnie and Audrey Brooks P.O. Box 1
Warrensville, NC 28693
Site
~50 E N
WSW-3 Christopher Edward Dollar 7597 NC Highway 194
Lansing, NC 28643
7607 NC Highway 194
Lansing, NC 28643 700 W P
WSW-5 Billy Joe Richardson 7653 NC Highway 194
Lansing, NC 28643
P.O. Box 34
West Jefferson, NC 28694 450 NW P
WSW-6 Ghanshyam & Vasanti Patel 7723 NC Highway 194
Lansing, NC 28643
P.O. Box 1222
West Jefferson, NC 28694 200 N P
WSW-7 Jimmy & Barbara Eldreth 7881 NC Highway 194
Lansing, NC 28643
7891 NC Highway 194
Lansing, NC 28643 830 NE P
WSW-8 Jimmy & Barbara Eldreth 7891 NC Highway 194
Lansing, NC 28643
7891 NC Highway 194
Lansing, NC 28643 940 NE P
WSW-9 Wanda Pless 7913 & 7915 NC Highway 194
Lansing, NC 28643
P.O. Box 176
Warrensville, NC 28693 1000 NE P
WSW-11 Thomas Allen Davis 7910 NC Highway 194
Lansing, NC 28643
3170 Big Horse Creek Road
Lansing, NC 28643 980 NE P
Notes:
P / I / N = Potable water supply / Irrigation / Not in use
The previous consultant identified 5 additional water supply wells within 1,000 to 1,500 feet of the site.
WSW-1 7712 NC Highway 194
Lansing, NC 28643
Table 2
Monitoring Well Construction Information and Water Level Measurements
M and P Grocery
7712 NC Highway 194
Lansing, Ashe County, North Carolina
NCDEQ Incident No. 23636
Terracon Project No. 75207123
Well ID
Well Casing
Depth (ft.
BGS)
Screen
Interval
(ft. BGS)
Depth of Well
(ft. BGS)
Top of
Casing
Elevation
Date Water
Level Measured
Depth to Water
from Top of
Casing (ft.)
LNAPL
Thickness
(ft.)
Groundwater
Elevation Comments
8/25/2011 5.32 -- 94.68
12/15/2011 4.25 -- 95.75
1/8/2013 4.69 -- 95.31
6/23/2015 5.56 -- 94.44
3/29/2016 3.90 -- 96.10
10/17/2017 5.28 -- 94.72
11/5/2019 3.27 -- 96.73
7/12/2021 3.25 -- 96.75
3/3/2022 3.30 -- 96.70
8/25/2011 12.50 -- 84.84
12/15/2011 7.41 -- 89.93
1/8/2013 7.43 -- 89.91
6/23/2015 7.38 -- 89.96
3/29/2016 NM -- --
10/17/2017 NM -- --
11/5/2019 5.75 -- 91.59
7/12/2021 5.62 -- 91.72
3/3/2022 5.80 -- 91.54
6/23/2015 5.81 -- 92.66
3/29/2016 4.28 -- 94.19
10/17/2017 5.88 -- 92.59
11/5/2019 3.64 -- 94.83
7/12/2021 3.68 -- 94.79
3/3/2022 3.80 -- 94.67
3/29/2016 6.3 -- 89.30
10/17/2017 8.38 -- 87.22
11/5/2019 6.84 -- 88.76
7/12/2021 6.73 -- 88.87
3/3/2022 6.90 -- 88.70
Notes:
BGS = below ground surface
LNAPL = Light Non-Aqueous Phase Liquid
NM = Not Measured
4-144
5-155
5 5-15 15
Type II
Type II
95.6014 Type II
Type II
97.3415
98.47
MW-4
MW-3
MW-2
MW-1 2 2-12 12 100.00
1 of 1
TABLE 3
Summary of Groundwater Analytical Results
M and P Grocery
7712 NC Highway 194
Lansing, Ashe County, North Carolina
NCDEQ Incident No. 23626
Terracon Project No. 75207123
Monitoring
Well
I.D.Date Collected
3/4/2010 NA <4.0 <0.39 <0.20 NA <5.2 <0.65 <0.20 <0.24 <0.25 NA <0.38 <0.39 <0.30 <0.26 <0.27 <0.20 <0.25 <0.40
6/14/2010 NA <5.4 <1.0 <0.50 NA NA <0.50 <0.50 <0.50 <0.50 NA <0.50 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <1.50
2/24/2012 NA BDL <0.50 <0.50 NA NA <0.50 <0.50 <0.50 <0.50 NA <1.0 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <1.50
6/7/2012 NA 22 <0.50 <0.50 NA NA <0.50 <0.50 <0.50 <0.50 NA <1.0 <1.0 <0.50 <0.50 <0.50 <0.50 <0.50 <1.50
1/8/2013 NA 4.5 <0.50 <0.50 NA <0.50 <0.50 <0.50 <0.50 <0.50 NA <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <0.50 <1.50
9/19/2014 21 J <0.50 <0.054 <0.084 NA <0.089 <0.19 <0.092 <0.11 <0.12 <2.4 <0.090 <0.12 <0.094 <0.12 <0.090 <0.18 <0.10 <0.29
10/16/2015 <4.9 <0.50 <0.15 <0.13 NA <0.12 <0.19 18 0.30 J <0.15 <2.4 <0.090 <0.12 0.35 J <0.15 3.8 3.6 1.1 <0.29
11/20/2016 <4.9 <0.50 <0.15 <0.13 <0.22 <0.15 <0.19 <0.13 <0.12 <0.15 <2.4 <0.090 <0.12 <0.13 <0.15 <0.17 <0.18 <0.13 42
1/2/2019 NA <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <0.50 <1.50
7/12/2021 <50.0 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <2.00
3/3/2022 <50.0 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <10.0 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <2.00
8/25/2011 NA 6.1 27 14 NA <0.0041 <5.0 510 25 12 NA <10.0 83 71 <5.0 110 520 160 1600
12/15/2011 NA 11 32 16 NA NS <5.0 1300 45 14 NA <10.0 220 130 <5.0 370 1000 300 3200
1/8/2013 NA 5.8 18 <0.50 NA <0.50 <0.50 644 27.4 <0.50 NA <0.50 117 83.9 <0.50 306 539 191 2134.3
6/23/2015 390 J 3.8 J 19 4.0 J NA <1.8 <3.9 620 18 2.6 J 75 J <1.8 210 66 <2.4 500 410 130 1930
3/29/2016
10/17/2017
11/5/2019 NA <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 999 21.5 NA NA <5.0 155 70.7 <5.0 620 527 159 3177.9
7/12/2021 <50.0 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 11.7 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 4.47 5.96 1.83 32.2
3/3/2022 <2500 <50.0 <50.0 <50.0 <250 <50.0 <50.0 1,250 <50.0 <50.0 <500 <50.0 <250 85.6 <50.0 469 649 194 4257.8
6,000 1 70 70 70 0.02 0.4 600 70 25 4,000 20 6 70 70 600 400 400 500
6,000,000 5,000 6,900 8,500 70,000 50 400 84,500 25,000 11,700 4,000,000 20,000 6,000 30,000 70,000 260,000 28,500 25,000 85,500
Notes:All measurements in micrograms per liter (μ/L)Bold indicates detection above Laboratory Reporting Limit
NE = Not Established indicates concentrations exceeding 2L
J = Detected below laboratory reporting limit indicates concentrations exceeding GCL
NR = Not Reported
BDL = Below Detection Limit
Analytical Method
Contaminant of Concern →EthylbenzeneChloroformBenzeneAcetonen-Butylbenzenesec-ButylbenzeneVOCs by Method 6200B
p-Isopropyltoluene1,2,4-TrimethylbenzeneTolueneEthylene DibromideMethyl Ethyl Ketone (2-Butanone)Not Sampled - Inaccessible
Not Sampled - Inaccessible NaphthaleneMethyl tert-Butyl EtherIsopropylbenzeneXylenes (Total)1,3,5-Trimethylbenzenen-PropylbenzeneStyrene1,2-DichloroethaneMW-1
MW-2
North Carolina Groundwater Quality
Standards (2L Standards)
Gross Contamination Levels for
Groundwater (GCL)
1 of 2
TABLE 3
Summary of Groundwater Analytical Results
M and P Grocery
7712 NC Highway 194
Lansing, Ashe County, North Carolina
NCDEQ Incident No. 23626
Terracon Project No. 75207123
Monitoring
Well
I.D.Date Collected
6/23/2015 120 J <0.79 40 6.7 NA <0.89 <1.9 180 29 4.0 J <24 <0.90 120 100 <1.2 23 620 260 397
3/29/2016 <97 <2.4 41 8.0 J <4.4 <2.4 <3.9 220 36 4.2 J <47 <1.8 59 140 <3.0 29 870 270 500
10/17/2017 <97 <2.4 20 8.0 J <4.4 <3.0 <3.9 150 34 3.8 J <47 <1.8 69 130 <3.0 17 740 250 286
11/5/2019 NA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 139 34.7 NA NA <2.5 45.4 145 <2.5 12 688 227 253.4
7/12/2021 <250 <5.00 13.8 6.73 <25.0 <5.00 <5.00 92.4 30.5 <5.00 <50.0 <5.00 <25.0 90.2 <5.00 <5.00 426 53.4 61.94
3/3/2022 <500 <10.0 16.9 <10.0 <50.0 <10.0 <10.0 98.1 28.7 <10.0 <100 <10.0 <50.0 108 <10.0 <10.0 628 201 203.2
3/29/2016 120 0.61 38 4.2 2 <0.12 <0.19 350 37 4.8 <2.4 <0.090 160 160 <0.15 41 840 40 146
10/17/2017 <49 2.0 J 12 6.2 <2.2 <1.5 <1.9 240 28 2.6 J <2.4 <0.090 98 97 <1.5 20 500 110 466
11/5/2019 NA <0.50 1.9 <0.50 <0.50 <0.50 <0.50 33.8 5.6 NA NA <0.50 9.3 22.8 <0.50 1.2 84.7 31.4 36.6
7/12/2021 <50.0 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <2.00
3/3/2022 <50.0 <1.00 <1.00 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <10.0 <1.00 <5.00 <1.00 <1.00 <1.00 <1.00 <1.00 <2.00
6,000 1 70 70 70 0.02 0.4 600 70 25 4,000 20 6 70 70 600 400 400 500
6,000,000 5,000 6,900 8,500 70,000 50 400 84,500 25,000 11,700 4,000,000 20,000 6,000 30,000 70,000 260,000 28,500 25,000 85,500
Notes:All measurements in micrograms per liter (μ/L)Bold indicates detection above Laboratory Reporting Limit
NE = Not Established indicates concentrations exceeding 2L
J = Detected below laboratory reporting limit indicates concentrations exceeding GCL
NR = Not Reported
BDL = Below Detection Limit
Gross Contamination Levels for
Groundwater (GCL)
North Carolina Groundwater Quality
Standards (2L Standards)
Analytical Method
Contaminant of Concern →AcetoneXylenes (Total)p-Isopropyltoluene1,2,4-TrimethylbenzeneMethyl tert-Butyl EtherNaphthalenen-PropylbenzeneStyreneTolueneBenzene1,2-DichloroethaneMethyl Ethyl Ketone (2-Butanone)1,3,5-TrimethylbenzeneVOCs by Method 6200B
ChloroformEthylbenzeneIsopropylbenzenen-Butylbenzenesec-ButylbenzeneMW-3
MW-4 Ethylene Dibromide2 of 2

APPENDIX A
FIELD NOTES AND
PHOTOGRAPH LOG
3.30 ft-TOC 2 inch
12.00 ft-TOC 1.4 Gal
8.70 feet 4.26 Gal
10 feet Stickup:0.4 ft-GRD 7.10 Gal
Start Time:14:05 End Time:
On (sec):Off (sec):Pressure:psi
ft-TOC
feet 200 mL
ft-TOC
Gallons
mL/min
(Yes/No)
Field Parameters (Taken at time intervals ≥ 5 minutes and purge volumes ≥ 1 flow-through cell volume)
Time
Volume
Purged Flow Rate
Depth to
Water Temp pH Spec. Cond.
Dissolved
Oxygen ORP*Turbidity
(gal)(mL/min)(ft)(°C)(s.u.)(µS/cm)(mg/L)(mV)(NTU)
14:05 0.0 ------------------------
14:10 11.0 7.3 476 10.1 37
14:20 10.5 8.0 498 30.4 13
14:30 10.5 8.5 428 10.9 -2
Final:14:30 10.5 8.5 428 10.9 -2
Sample Method:14:30 14:30
Qty Container Qty Container
Name Signature Date
(1)
Notes:
Revision 09SEP2021
Project Number:75207123 Purge Date:March 3, 2022
Source Well:MW-1 Purge Time: Minutes
LOW FLOW GROUNDWATER SAMPLING FORM
Project Name:M&P Grocery
Project Location:Ashe County, Lansing, NC
Weather:Sunny Air Temp:° F
Water Level & Well Data
Locked?:No Sample Date:March 3, 2022
Sampled By:Chris Driscoll Sample Time:14:30
Measuring Point:Top of Casing Well Volume
Total Well Depth:Water Volume
Height of Water Column:3 * Well Volume
Screen Length:5 * Well Volume
Well Purging Information
Depth to Water:Well Diameter
(If Used)Bladder Pump Control Settings:
Purge Method:14:30
Pump Intake Depth from Top of Casing:
Water Column Above Pump Intake:Flow Through Cell Vol:
Final Volume Purged:Used YSI Pro Plus
Final Volume Purge Rate:
Well Purged Dry?:
DTW-TOC at 25% Drawdown of WC Above Pump:Comments:
Comment
Start Purging
End of Purging
Bailer Sample Start Time:Sample End Time:
Analytical Data
Method Preservative Method Preservative
VOCs 6200 HCl
To convert ORP to Eh, add 205 mV to ORP.
5.91 ft-TOC 2 inch
15.00 ft-TOC 1.5 Gal
9.09 feet 4.45 Gal
10 feet Stickup:0.4 ft-GRD 7.42 Gal
Start Time:12:30 End Time:
On (sec):Off (sec):Pressure:psi
ft-TOC
feet 200 mL
ft-TOC
Gallons
mL/min
(Yes/No)
Field Parameters (Taken at time intervals ≥ 5 minutes and purge volumes ≥ 1 flow-through cell volume)
Time
Volume
Purged Flow Rate
Depth to
Water Temp pH Spec. Cond.
Dissolved
Oxygen ORP*Turbidity
(gal)(mL/min)(ft)(°C)(s.u.)(mS/cm)(mg/L)(mV)(NTU)
12:30 0.0 ------------------------
12:35 11.0 7.5 124.200 9.8 131
12:45 12.3 6.7 132.500 8.3 126
12:55 13.8 6.6 147.800 9.7 142
Final:12:55 13.8 6.6 147.800 9.7 142
Sample Method:12:55 12:55
Qty Container Qty Container
Name Signature Date
(1)
Notes:
Revision 09SEP2021
LOW FLOW GROUNDWATER SAMPLING FORM
Project Name:M&P Grocery
Source Well:MW-2 Purge Time:
Sunny
Locked?:No Sample Date:March 3, 2022
Project Location:Ashe County, Lansing, NC
Project Number:75207123 Purge Date:March 3, 2022
Minutes
Sampled By:Chris Driscoll Sample Time:
Weather:Air Temp:° F
12:55
Total Well Depth:Water Volume
Water Level & Well Data
Measuring Point:Top of Casing Well Volume
Height of Water Column:3 * Well Volume
Screen Length:5 * Well Volume
Well Purging Information
Depth to Water:Well Diameter
Purge Method:12:55
(If Used)Bladder Pump Control Settings:
Pump Intake Depth from Top of Casing:
Water Column Above Pump Intake:Flow Through Cell Vol:
DTW-TOC at 25% Drawdown of WC Above Pump:Comments:
Comment
Final Volume Purged:Used YSI Pro Plus
Final Volume Purge Rate:
Well Purged Dry?:
Start Purging
End of Purging
Bailer Sample Start Time:Sample End Time:
Analytical Data
Method Preservative Method Preservative
VOCs 6200 HCl
To convert ORP to Eh, add 205 mV to ORP.
3.80 ft-TOC 2 inch
15.00 ft-TOC 1.8 Gal
11.20 feet 5.48 Gal
10 feet Stickup:0.4 ft-GRD 9.14 Gal
Start Time:13:00 End Time:
On (sec):Off (sec):Pressure:psi
ft-TOC
feet 200 mL
ft-TOC
Gallons
mL/min
(Yes/No)
Field Parameters (Taken at time intervals ≥ 5 minutes and purge volumes ≥ 1 flow-through cell volume)
Time
Volume
Purged Flow Rate
Depth to
Water Temp pH Spec. Cond.
Dissolved
Oxygen ORP*Turbidity
(gal)(mL/min)(ft)(°C)(s.u.)(mS/cm)(mg/L)(mV)(NTU)
13:00 0.0 ------------------------
13:10 11.4 6.7 1125.000 10.0 -84
13:20 12.5 6.7 1138.000 9.3 -77
13:30 13.0 6.7 1090.000 17.8 -61
Final:13:30 13.0 6.7 1090.000 17.8 -61
Sample Method:13:30 13:30
Qty Container Qty Container
Name Signature Date
(1)
Notes:
Revision 09SEP2021
Project Number:75207123 Purge Date:March 3, 2022
Source Well:MW-3 Purge Time: Minutes
LOW FLOW GROUNDWATER SAMPLING FORM
Project Name:M&P Grocery
Project Location:Ashe County, Lansing, NC
Weather:Sunny Air Temp:° F
Water Level & Well Data
Locked?:No Sample Date:March 3, 2022
Sampled By:Chris Driscoll Sample Time:13:30
Measuring Point:Top of Casing Well Volume
Total Well Depth:Water Volume
Height of Water Column:3 * Well Volume
Screen Length:5 * Well Volume
Well Purging Information
Depth to Water:Well Diameter
(If Used)Bladder Pump Control Settings:
Purge Method:13:30
Pump Intake Depth from Top of Casing:
Water Column Above Pump Intake:Flow Through Cell Vol:
Final Volume Purged:Used YSI Pro Plus
Final Volume Purge Rate:
Well Purged Dry?:
DTW-TOC at 25% Drawdown of WC Above Pump:Comments:
Comment
Start Purging
End of Purging
Bailer Sample Start Time:Sample End Time:
Analytical Data
Method Preservative Method Preservative
VOCs 6200 HCl
To convert ORP to Eh, add 205 mV to ORP.
6.90 ft-TOC 2 inch
14.00 ft-TOC 1.2 Gal
7.10 feet 3.48 Gal
10 feet Stickup:0.4 ft-GRD 5.79 Gal
Start Time:13:35 End Time:
On (sec):Off (sec):Pressure:psi
ft-TOC
feet 200 mL
ft-TOC
Gallons
mL/min
(Yes/No)
Field Parameters (Taken at time intervals ≥ 5 minutes and purge volumes ≥ 1 flow-through cell volume)
Time
Volume
Purged Flow Rate
Depth to
Water Temp pH Spec. Cond.
Dissolved
Oxygen ORP*Turbidity
(gal)(mL/min)(ft)(°C)(s.u.)(mS/cm)(mg/L)(mV)(NTU)
13:35 0.0 ------------------------
13:45 11.5 7.2 149.100 -18
13:55 11.4 7.4 118.000 7
14:00 12.2 7.4 120.200 49
Final:14:00 12.2 7.4 120.200 49
Sample Method:14:00 14:00
Qty Container Qty Container
Name Signature Date
(1)
Notes:
Revision 09SEP2021
Project Number:75207123 Purge Date:March 3, 2022
Source Well:MW-4 Purge Time: Minutes
LOW FLOW GROUNDWATER SAMPLING FORM
Project Name:M&P Grocery
Project Location:Ashe County, Lansing, NC
Weather:Sunny Air Temp:° F
Water Level & Well Data
Locked?:No Sample Date:March 3, 2022
Sampled By:Chris Driscoll Sample Time:14:00
Measuring Point:Top of Casing Well Volume
Total Well Depth:Water Volume
Height of Water Column:3 * Well Volume
Screen Length:5 * Well Volume
Well Purging Information
Depth to Water:Well Diameter
(If Used)Bladder Pump Control Settings:
Purge Method:14:00
Pump Intake Depth from Top of Casing:
Water Column Above Pump Intake:Flow Through Cell Vol:
Final Volume Purged:Used YSI Pro Plus
Final Volume Purge Rate:
Well Purged Dry?:
DTW-TOC at 25% Drawdown of WC Above Pump:Comments:
Comment
Start Purging
End of Purging
Bailer Sample Start Time:Sample End Time:
Analytical Data
Method Preservative Method Preservative
VOCs 6200 HCl
To convert ORP to Eh, add 205 mV to ORP.
Groundwater Monitoring Report
M&P Grocery (Incident #23626) ■ Lansing, NC
Date Photos Taken: March 3, 2022 ■ Terracon Project No. 75207123

Responsive ■ Responsible ■ Reliable

Photo #1 View of former M&P Grocery looking
west.
Photo #2 View looking east from former M&P
Grocery building.

Photo #3 View of former tank pit area looking west. Photo #4 View of former location of WSW-1 east of
the former tank pit area.

APPENDIX B
LABORATORY ANALYTICAL RESULTS AND
CHAIN-OF-CUSTODY FORMS

ANALYTICAL REPORT
March 09, 2022
Terracon - Greensboro, NC
Sample Delivery Group:L1467957
Samples Received:03/04/2022
Project Number:75207123
Description:M&P Grocery
Report To:Chris Driscoll
7327-G, West Friendly Ave
Greensboro, NC 27410
Entire Report Reviewed By:
March 09, 2022
[Preliminary Report]
Heather J Wagner
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.
Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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March 10, 2022
Heather J Wagner
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Sr: Sample Results 5
MW-1 L1467957-01 5
MW-2 L1467957-02 7
MW-3 L1467957-03 9
MW-4 L1467957-04 11
FB-1 L1467957-05 13
Qc: Quality Control Summary 15
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 15
Gl: Glossary of Terms 25
Al: Accreditations & Locations 26
Sc: Sample Chain of Custody 27
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-1 L1467957-01 GW 03/03/22 14:30 03/04/22 09:30
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1828432 1 03/07/22 17:26 03/07/22 17:26 BMB Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1828778 1 03/08/22 19:58 03/08/22 19:58 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2 L1467957-02 GW 03/03/22 12:55 03/04/22 09:30
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1828778 50 03/08/22 21:03 03/08/22 21:03 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-3 L1467957-03 GW 03/03/22 13:30 03/04/22 09:30
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1828778 10 03/08/22 21:24 03/08/22 21:24 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1467957-04 GW 03/03/22 14:00 03/04/22 09:30
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1828432 1 03/07/22 18:09 03/07/22 18:09 BMB Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1828778 1 03/08/22 20:19 03/08/22 20:19 JAH Mt. Juliet, TN
Collected by Collected date/time Received date/time
FB-1 L1467957-05 GW 03/03/22 13:35 03/04/22 09:30
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 WG1828432 1 03/07/22 18:31 03/07/22 18:31 BMB Mt. Juliet, TN
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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CASE NARRATIVE
All sample aliquots were received at the correct temperature, in the proper containers, with the
appropriate preservatives, and within method specified holding times, unless qualified or notated within
the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples
have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control
are within established criteria except where addressed in this case narrative, a non-conformance form
or properly qualified within the sample results. By my digital signature below, I affirm to the best of my
knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the
quality of the data have been identified by the laboratory, and no information or data have been
knowingly withheld that would affect the quality of the data.
[Preliminary Report]
Heather J Wagner
Project Manager
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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Heather J Wagner
Project Manager
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SAMPLE RESULTS - 01
L1467957
MW-1
Collected date/time: 03/03/22 14:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 1 03/07/2022 17:26 WG1828432
Acrolein ND 50.0 1 03/07/2022 17:26 WG1828432
Acrylonitrile ND 10.0 1 03/07/2022 17:26 WG1828432
Benzene ND 1.00 1 03/07/2022 17:26 WG1828432
Bromobenzene ND 1.00 1 03/07/2022 17:26 WG1828432
Bromodichloromethane ND 1.00 1 03/07/2022 17:26 WG1828432
Bromoform ND 1.00 1 03/07/2022 17:26 WG1828432
Bromomethane ND 5.00 1 03/07/2022 17:26 WG1828432
n-Butylbenzene ND 1.00 1 03/07/2022 17:26 WG1828432
sec-Butylbenzene ND 1.00 1 03/07/2022 17:26 WG1828432
tert-Butylbenzene ND 1.00 1 03/07/2022 17:26 WG1828432
Carbon tetrachloride ND 1.00 1 03/07/2022 17:26 WG1828432
Chlorobenzene ND 1.00 1 03/07/2022 17:26 WG1828432
Chlorodibromomethane ND 1.00 1 03/07/2022 17:26 WG1828432
Chloroethane ND 5.00 1 03/07/2022 17:26 WG1828432
Chloroform ND 5.00 1 03/07/2022 17:26 WG1828432
Chloromethane ND 2.50 1 03/07/2022 17:26 WG1828432
2-Chlorotoluene ND 1.00 1 03/07/2022 17:26 WG1828432
4-Chlorotoluene ND 1.00 1 03/07/2022 17:26 WG1828432
1,2-Dibromo-3-Chloropropane ND 5.00 1 03/07/2022 17:26 WG1828432
1,2-Dibromoethane ND 1.00 1 03/07/2022 17:26 WG1828432
Dibromomethane ND 1.00 1 03/07/2022 17:26 WG1828432
1,2-Dichlorobenzene ND 1.00 1 03/07/2022 17:26 WG1828432
1,3-Dichlorobenzene ND 1.00 1 03/07/2022 17:26 WG1828432
1,4-Dichlorobenzene ND 1.00 1 03/07/2022 17:26 WG1828432
Dichlorodifluoromethane ND 5.00 1 03/07/2022 17:26 WG1828432
1,1-Dichloroethane ND 1.00 1 03/07/2022 17:26 WG1828432
1,2-Dichloroethane ND 1.00 1 03/07/2022 17:26 WG1828432
1,1-Dichloroethene ND 1.00 1 03/07/2022 17:26 WG1828432
cis-1,2-Dichloroethene ND 1.00 1 03/07/2022 17:26 WG1828432
trans-1,2-Dichloroethene ND 1.00 1 03/07/2022 17:26 WG1828432
1,2-Dichloropropane ND 1.00 1 03/07/2022 17:26 WG1828432
1,1-Dichloropropene ND 1.00 1 03/07/2022 17:26 WG1828432
1,3-Dichloropropane ND 1.00 1 03/07/2022 17:26 WG1828432
2,2-Dichloropropane ND 1.00 1 03/07/2022 17:26 WG1828432
Di-isopropyl ether ND 1.00 1 03/07/2022 17:26 WG1828432
Ethylbenzene ND 1.00 1 03/07/2022 17:26 WG1828432
Hexachloro-1,3-butadiene ND 1.00 1 03/07/2022 17:26 WG1828432
Isopropylbenzene ND 1.00 1 03/07/2022 17:26 WG1828432
p-Isopropyltoluene ND 1.00 1 03/07/2022 17:26 WG1828432
2-Butanone (MEK)ND 10.0 1 03/07/2022 17:26 WG1828432
Methylene Chloride ND 5.00 1 03/07/2022 17:26 WG1828432
4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/07/2022 17:26 WG1828432
Methyl tert-butyl ether ND 1.00 1 03/07/2022 17:26 WG1828432
Naphthalene ND 5.00 1 03/07/2022 17:26 WG1828432
n-Propylbenzene ND 1.00 1 03/07/2022 17:26 WG1828432
Styrene ND 1.00 1 03/07/2022 17:26 WG1828432
1,1,1,2-Tetrachloroethane ND 1.00 1 03/07/2022 17:26 WG1828432
1,1,2,2-Tetrachloroethane ND 1.00 1 03/07/2022 17:26 WG1828432
Tetrachloroethene ND 1.00 1 03/07/2022 17:26 WG1828432
Toluene ND 1.00 1 03/07/2022 17:26 WG1828432
1,2,3-Trichlorobenzene ND 1.00 1 03/07/2022 17:26 WG1828432
1,2,4-Trichlorobenzene ND 1.00 1 03/07/2022 17:26 WG1828432
1,1,1-Trichloroethane ND 1.00 1 03/07/2022 17:26 WG1828432
1,1,2-Trichloroethane ND 1.00 1 03/07/2022 17:26 WG1828432
Trichloroethene ND 1.00 1 03/07/2022 17:26 WG1828432
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 01
L1467957
MW-1
Collected date/time: 03/03/22 14:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 5.00 1 03/07/2022 17:26 WG1828432
1,2,3-Trichloropropane ND 2.50 1 03/07/2022 17:26 WG1828432
1,2,4-Trimethylbenzene ND 1.00 1 03/08/2022 19:58 WG1828778
1,3,5-Trimethylbenzene ND 1.00 1 03/08/2022 19:58 WG1828778
Vinyl chloride ND 1.00 1 03/07/2022 17:26 WG1828432
o-Xylene ND 1.00 1 03/07/2022 17:26 WG1828432
m&p-Xylenes ND 2.00 1 03/07/2022 17:26 WG1828432
(S) Toluene-d8 99.1 80.0-120 03/07/2022 17:26 WG1828432
(S) Toluene-d8 107 80.0-120 03/08/2022 19:58 WG1828778
(S) 4-Bromofluorobenzene 96.6 77.0-126 03/07/2022 17:26 WG1828432
(S) 4-Bromofluorobenzene 106 77.0-126 03/08/2022 19:58 WG1828778
(S) 1,2-Dichloroethane-d4 105 70.0-130 03/07/2022 17:26 WG1828432
(S) 1,2-Dichloroethane-d4 102 70.0-130 03/08/2022 19:58 WG1828778
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 02
L1467957
MW-2
Collected date/time: 03/03/22 12:55
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 2500 50 03/08/2022 21:03 WG1828778
Acrolein ND 2500 50 03/08/2022 21:03 WG1828778
Acrylonitrile ND 500 50 03/08/2022 21:03 WG1828778
Benzene ND 50.0 50 03/08/2022 21:03 WG1828778
Bromobenzene ND 50.0 50 03/08/2022 21:03 WG1828778
Bromodichloromethane ND 50.0 50 03/08/2022 21:03 WG1828778
Bromoform ND 50.0 50 03/08/2022 21:03 WG1828778
Bromomethane ND 250 50 03/08/2022 21:03 WG1828778
n-Butylbenzene ND 50.0 50 03/08/2022 21:03 WG1828778
sec-Butylbenzene ND 50.0 50 03/08/2022 21:03 WG1828778
tert-Butylbenzene ND 50.0 50 03/08/2022 21:03 WG1828778
Carbon tetrachloride ND 50.0 50 03/08/2022 21:03 WG1828778
Chlorobenzene ND 50.0 50 03/08/2022 21:03 WG1828778
Chlorodibromomethane ND 50.0 50 03/08/2022 21:03 WG1828778
Chloroethane ND 250 50 03/08/2022 21:03 WG1828778
Chloroform ND 250 50 03/08/2022 21:03 WG1828778
Chloromethane ND 125 50 03/08/2022 21:03 WG1828778
2-Chlorotoluene ND 50.0 50 03/08/2022 21:03 WG1828778
4-Chlorotoluene ND 50.0 50 03/08/2022 21:03 WG1828778
1,2-Dibromo-3-Chloropropane ND 250 50 03/08/2022 21:03 WG1828778
1,2-Dibromoethane ND 50.0 50 03/08/2022 21:03 WG1828778
Dibromomethane ND 50.0 50 03/08/2022 21:03 WG1828778
1,2-Dichlorobenzene ND 50.0 50 03/08/2022 21:03 WG1828778
1,3-Dichlorobenzene ND 50.0 50 03/08/2022 21:03 WG1828778
1,4-Dichlorobenzene ND 50.0 50 03/08/2022 21:03 WG1828778
Dichlorodifluoromethane ND 250 50 03/08/2022 21:03 WG1828778
1,1-Dichloroethane ND 50.0 50 03/08/2022 21:03 WG1828778
1,2-Dichloroethane ND 50.0 50 03/08/2022 21:03 WG1828778
1,1-Dichloroethene ND 50.0 50 03/08/2022 21:03 WG1828778
cis-1,2-Dichloroethene ND 50.0 50 03/08/2022 21:03 WG1828778
trans-1,2-Dichloroethene ND 50.0 50 03/08/2022 21:03 WG1828778
1,2-Dichloropropane ND 50.0 50 03/08/2022 21:03 WG1828778
1,1-Dichloropropene ND 50.0 50 03/08/2022 21:03 WG1828778
1,3-Dichloropropane ND 50.0 50 03/08/2022 21:03 WG1828778
2,2-Dichloropropane ND 50.0 50 03/08/2022 21:03 WG1828778
Di-isopropyl ether ND 50.0 50 03/08/2022 21:03 WG1828778
Ethylbenzene 1250 50.0 50 03/08/2022 21:03 WG1828778
Hexachloro-1,3-butadiene ND 50.0 50 03/08/2022 21:03 WG1828778
Isopropylbenzene ND 50.0 50 03/08/2022 21:03 WG1828778
p-Isopropyltoluene ND 50.0 50 03/08/2022 21:03 WG1828778
2-Butanone (MEK)ND 500 50 03/08/2022 21:03 WG1828778
Methylene Chloride ND 250 50 03/08/2022 21:03 WG1828778
4-Methyl-2-pentanone (MIBK)ND 500 50 03/08/2022 21:03 WG1828778
Methyl tert-butyl ether ND 50.0 50 03/08/2022 21:03 WG1828778
Naphthalene ND 250 50 03/08/2022 21:03 WG1828778
n-Propylbenzene 85.6 50.0 50 03/08/2022 21:03 WG1828778
Styrene ND 50.0 50 03/08/2022 21:03 WG1828778
1,1,1,2-Tetrachloroethane ND 50.0 50 03/08/2022 21:03 WG1828778
1,1,2,2-Tetrachloroethane ND 50.0 50 03/08/2022 21:03 WG1828778
Tetrachloroethene ND 50.0 50 03/08/2022 21:03 WG1828778
Toluene 469 50.0 50 03/08/2022 21:03 WG1828778
1,2,3-Trichlorobenzene ND 50.0 50 03/08/2022 21:03 WG1828778
1,2,4-Trichlorobenzene ND 50.0 50 03/08/2022 21:03 WG1828778
1,1,1-Trichloroethane ND 50.0 50 03/08/2022 21:03 WG1828778
1,1,2-Trichloroethane ND 50.0 50 03/08/2022 21:03 WG1828778
Trichloroethene ND 50.0 50 03/08/2022 21:03 WG1828778
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 02
L1467957
MW-2
Collected date/time: 03/03/22 12:55
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 250 50 03/08/2022 21:03 WG1828778
1,2,3-Trichloropropane ND 125 50 03/08/2022 21:03 WG1828778
1,2,4-Trimethylbenzene 649 50.0 50 03/08/2022 21:03 WG1828778
1,3,5-Trimethylbenzene 194 50.0 50 03/08/2022 21:03 WG1828778
Vinyl chloride ND 50.0 50 03/08/2022 21:03 WG1828778
o-Xylene 67.8 50.0 50 03/08/2022 21:03 WG1828778
m&p-Xylenes 4190 100 50 03/08/2022 21:03 WG1828778
(S) Toluene-d8 96.5 80.0-120 03/08/2022 21:03 WG1828778
(S) 4-Bromofluorobenzene 103 77.0-126 03/08/2022 21:03 WG1828778
(S) 1,2-Dichloroethane-d4 98.3 70.0-130 03/08/2022 21:03 WG1828778
Sample Narrative:
L1467957-02 WG1828778: Target compounds too high to run at a lower dilution.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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SAMPLE RESULTS - 03
L1467957
MW-3
Collected date/time: 03/03/22 13:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 500 10 03/08/2022 21:24 WG1828778
Acrolein ND 500 10 03/08/2022 21:24 WG1828778
Acrylonitrile ND 100 10 03/08/2022 21:24 WG1828778
Benzene ND 10.0 10 03/08/2022 21:24 WG1828778
Bromobenzene ND 10.0 10 03/08/2022 21:24 WG1828778
Bromodichloromethane ND 10.0 10 03/08/2022 21:24 WG1828778
Bromoform ND 10.0 10 03/08/2022 21:24 WG1828778
Bromomethane ND 50.0 10 03/08/2022 21:24 WG1828778
n-Butylbenzene 16.9 10.0 10 03/08/2022 21:24 WG1828778
sec-Butylbenzene ND 10.0 10 03/08/2022 21:24 WG1828778
tert-Butylbenzene ND 10.0 10 03/08/2022 21:24 WG1828778
Carbon tetrachloride ND 10.0 10 03/08/2022 21:24 WG1828778
Chlorobenzene ND 10.0 10 03/08/2022 21:24 WG1828778
Chlorodibromomethane ND 10.0 10 03/08/2022 21:24 WG1828778
Chloroethane ND 50.0 10 03/08/2022 21:24 WG1828778
Chloroform ND 50.0 10 03/08/2022 21:24 WG1828778
Chloromethane ND 25.0 10 03/08/2022 21:24 WG1828778
2-Chlorotoluene ND 10.0 10 03/08/2022 21:24 WG1828778
4-Chlorotoluene ND 10.0 10 03/08/2022 21:24 WG1828778
1,2-Dibromo-3-Chloropropane ND 50.0 10 03/08/2022 21:24 WG1828778
1,2-Dibromoethane ND 10.0 10 03/08/2022 21:24 WG1828778
Dibromomethane ND 10.0 10 03/08/2022 21:24 WG1828778
1,2-Dichlorobenzene ND 10.0 10 03/08/2022 21:24 WG1828778
1,3-Dichlorobenzene ND 10.0 10 03/08/2022 21:24 WG1828778
1,4-Dichlorobenzene ND 10.0 10 03/08/2022 21:24 WG1828778
Dichlorodifluoromethane ND 50.0 10 03/08/2022 21:24 WG1828778
1,1-Dichloroethane ND 10.0 10 03/08/2022 21:24 WG1828778
1,2-Dichloroethane ND 10.0 10 03/08/2022 21:24 WG1828778
1,1-Dichloroethene ND 10.0 10 03/08/2022 21:24 WG1828778
cis-1,2-Dichloroethene ND 10.0 10 03/08/2022 21:24 WG1828778
trans-1,2-Dichloroethene ND 10.0 10 03/08/2022 21:24 WG1828778
1,2-Dichloropropane ND 10.0 10 03/08/2022 21:24 WG1828778
1,1-Dichloropropene ND 10.0 10 03/08/2022 21:24 WG1828778
1,3-Dichloropropane ND 10.0 10 03/08/2022 21:24 WG1828778
2,2-Dichloropropane ND 10.0 10 03/08/2022 21:24 WG1828778
Di-isopropyl ether ND 10.0 10 03/08/2022 21:24 WG1828778
Ethylbenzene 98.1 10.0 10 03/08/2022 21:24 WG1828778
Hexachloro-1,3-butadiene ND 10.0 10 03/08/2022 21:24 WG1828778
Isopropylbenzene 28.7 10.0 10 03/08/2022 21:24 WG1828778
p-Isopropyltoluene ND 10.0 10 03/08/2022 21:24 WG1828778
2-Butanone (MEK)ND 100 10 03/08/2022 21:24 WG1828778
Methylene Chloride ND 50.0 10 03/08/2022 21:24 WG1828778
4-Methyl-2-pentanone (MIBK)ND 100 10 03/08/2022 21:24 WG1828778
Methyl tert-butyl ether ND 10.0 10 03/08/2022 21:24 WG1828778
Naphthalene ND 50.0 10 03/08/2022 21:24 WG1828778
n-Propylbenzene 108 10.0 10 03/08/2022 21:24 WG1828778
Styrene ND 10.0 10 03/08/2022 21:24 WG1828778
1,1,1,2-Tetrachloroethane ND 10.0 10 03/08/2022 21:24 WG1828778
1,1,2,2-Tetrachloroethane ND 10.0 10 03/08/2022 21:24 WG1828778
Tetrachloroethene ND 10.0 10 03/08/2022 21:24 WG1828778
Toluene ND 10.0 10 03/08/2022 21:24 WG1828778
1,2,3-Trichlorobenzene ND 10.0 10 03/08/2022 21:24 WG1828778
1,2,4-Trichlorobenzene ND 10.0 10 03/08/2022 21:24 WG1828778
1,1,1-Trichloroethane ND 10.0 10 03/08/2022 21:24 WG1828778
1,1,2-Trichloroethane ND 10.0 10 03/08/2022 21:24 WG1828778
Trichloroethene ND 10.0 10 03/08/2022 21:24 WG1828778
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 9 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 9 of 28
SAMPLE RESULTS - 03
L1467957
MW-3
Collected date/time: 03/03/22 13:30
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 50.0 10 03/08/2022 21:24 WG1828778
1,2,3-Trichloropropane ND 25.0 10 03/08/2022 21:24 WG1828778
1,2,4-Trimethylbenzene 628 10.0 10 03/08/2022 21:24 WG1828778
1,3,5-Trimethylbenzene 201 10.0 10 03/08/2022 21:24 WG1828778
Vinyl chloride ND 10.0 10 03/08/2022 21:24 WG1828778
o-Xylene 15.2 10.0 10 03/08/2022 21:24 WG1828778
m&p-Xylenes 188 20.0 10 03/08/2022 21:24 WG1828778
(S) Toluene-d8 96.5 80.0-120 03/08/2022 21:24 WG1828778
(S) 4-Bromofluorobenzene 100 77.0-126 03/08/2022 21:24 WG1828778
(S) 1,2-Dichloroethane-d4 106 70.0-130 03/08/2022 21:24 WG1828778
Sample Narrative:
L1467957-03 WG1828778: Target compounds too high to run at a lower dilution.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 10 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 10 of 28
SAMPLE RESULTS - 04
L1467957
MW-4
Collected date/time: 03/03/22 14:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 1 03/07/2022 18:09 WG1828432
Acrolein ND 50.0 1 03/07/2022 18:09 WG1828432
Acrylonitrile ND 10.0 1 03/07/2022 18:09 WG1828432
Benzene ND 1.00 1 03/07/2022 18:09 WG1828432
Bromobenzene ND 1.00 1 03/07/2022 18:09 WG1828432
Bromodichloromethane ND 1.00 1 03/07/2022 18:09 WG1828432
Bromoform ND 1.00 1 03/07/2022 18:09 WG1828432
Bromomethane ND 5.00 1 03/07/2022 18:09 WG1828432
n-Butylbenzene ND 1.00 1 03/07/2022 18:09 WG1828432
sec-Butylbenzene ND 1.00 1 03/07/2022 18:09 WG1828432
tert-Butylbenzene ND 1.00 1 03/07/2022 18:09 WG1828432
Carbon tetrachloride ND 1.00 1 03/07/2022 18:09 WG1828432
Chlorobenzene ND 1.00 1 03/07/2022 18:09 WG1828432
Chlorodibromomethane ND 1.00 1 03/07/2022 18:09 WG1828432
Chloroethane ND 5.00 1 03/07/2022 18:09 WG1828432
Chloroform ND 5.00 1 03/07/2022 18:09 WG1828432
Chloromethane ND 2.50 1 03/07/2022 18:09 WG1828432
2-Chlorotoluene ND 1.00 1 03/07/2022 18:09 WG1828432
4-Chlorotoluene ND 1.00 1 03/07/2022 18:09 WG1828432
1,2-Dibromo-3-Chloropropane ND 5.00 1 03/07/2022 18:09 WG1828432
1,2-Dibromoethane ND 1.00 1 03/07/2022 18:09 WG1828432
Dibromomethane ND 1.00 1 03/07/2022 18:09 WG1828432
1,2-Dichlorobenzene ND 1.00 1 03/07/2022 18:09 WG1828432
1,3-Dichlorobenzene ND 1.00 1 03/07/2022 18:09 WG1828432
1,4-Dichlorobenzene ND 1.00 1 03/07/2022 18:09 WG1828432
Dichlorodifluoromethane ND 5.00 1 03/07/2022 18:09 WG1828432
1,1-Dichloroethane ND 1.00 1 03/07/2022 18:09 WG1828432
1,2-Dichloroethane ND 1.00 1 03/07/2022 18:09 WG1828432
1,1-Dichloroethene ND 1.00 1 03/07/2022 18:09 WG1828432
cis-1,2-Dichloroethene ND 1.00 1 03/07/2022 18:09 WG1828432
trans-1,2-Dichloroethene ND 1.00 1 03/07/2022 18:09 WG1828432
1,2-Dichloropropane ND 1.00 1 03/07/2022 18:09 WG1828432
1,1-Dichloropropene ND 1.00 1 03/07/2022 18:09 WG1828432
1,3-Dichloropropane ND 1.00 1 03/07/2022 18:09 WG1828432
2,2-Dichloropropane ND 1.00 1 03/07/2022 18:09 WG1828432
Di-isopropyl ether ND 1.00 1 03/07/2022 18:09 WG1828432
Ethylbenzene ND 1.00 1 03/08/2022 20:19 WG1828778
Hexachloro-1,3-butadiene ND 1.00 1 03/07/2022 18:09 WG1828432
Isopropylbenzene ND 1.00 1 03/07/2022 18:09 WG1828432
p-Isopropyltoluene ND 1.00 1 03/07/2022 18:09 WG1828432
2-Butanone (MEK)ND 10.0 1 03/07/2022 18:09 WG1828432
Methylene Chloride ND 5.00 1 03/07/2022 18:09 WG1828432
4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/07/2022 18:09 WG1828432
Methyl tert-butyl ether ND 1.00 1 03/07/2022 18:09 WG1828432
Naphthalene ND 5.00 1 03/07/2022 18:09 WG1828432
n-Propylbenzene ND 1.00 1 03/07/2022 18:09 WG1828432
Styrene ND 1.00 1 03/07/2022 18:09 WG1828432
1,1,1,2-Tetrachloroethane ND 1.00 1 03/07/2022 18:09 WG1828432
1,1,2,2-Tetrachloroethane ND 1.00 1 03/07/2022 18:09 WG1828432
Tetrachloroethene ND 1.00 1 03/07/2022 18:09 WG1828432
Toluene ND 1.00 1 03/07/2022 18:09 WG1828432
1,2,3-Trichlorobenzene ND 1.00 1 03/07/2022 18:09 WG1828432
1,2,4-Trichlorobenzene ND 1.00 1 03/07/2022 18:09 WG1828432
1,1,1-Trichloroethane ND 1.00 1 03/07/2022 18:09 WG1828432
1,1,2-Trichloroethane ND 1.00 1 03/07/2022 18:09 WG1828432
Trichloroethene ND 1.00 1 03/07/2022 18:09 WG1828432
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 11 of 28
SAMPLE RESULTS - 04
L1467957
MW-4
Collected date/time: 03/03/22 14:00
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 5.00 1 03/07/2022 18:09 WG1828432
1,2,3-Trichloropropane ND 2.50 1 03/07/2022 18:09 WG1828432
1,2,4-Trimethylbenzene ND 1.00 1 03/08/2022 20:19 WG1828778
1,3,5-Trimethylbenzene ND 1.00 1 03/07/2022 18:09 WG1828432
Vinyl chloride ND 1.00 1 03/07/2022 18:09 WG1828432
o-Xylene ND 1.00 1 03/07/2022 18:09 WG1828432
m&p-Xylenes ND 2.00 1 03/08/2022 20:19 WG1828778
(S) Toluene-d8 91.0 80.0-120 03/07/2022 18:09 WG1828432
(S) Toluene-d8 91.4 80.0-120 03/08/2022 20:19 WG1828778
(S) 4-Bromofluorobenzene 104 77.0-126 03/07/2022 18:09 WG1828432
(S) 4-Bromofluorobenzene 102 77.0-126 03/08/2022 20:19 WG1828778
(S) 1,2-Dichloroethane-d4 96.5 70.0-130 03/07/2022 18:09 WG1828432
(S) 1,2-Dichloroethane-d4 98.6 70.0-130 03/08/2022 20:19 WG1828778
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 12 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 12 of 28
SAMPLE RESULTS - 05
L1467957
FB-1
Collected date/time: 03/03/22 13:35
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 1 03/07/2022 18:31 WG1828432
Acrolein ND 50.0 1 03/07/2022 18:31 WG1828432
Acrylonitrile ND 10.0 1 03/07/2022 18:31 WG1828432
Benzene ND 1.00 1 03/07/2022 18:31 WG1828432
Bromobenzene ND 1.00 1 03/07/2022 18:31 WG1828432
Bromodichloromethane ND 1.00 1 03/07/2022 18:31 WG1828432
Bromoform ND 1.00 1 03/07/2022 18:31 WG1828432
Bromomethane ND 5.00 1 03/07/2022 18:31 WG1828432
n-Butylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
sec-Butylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
tert-Butylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
Carbon tetrachloride ND 1.00 1 03/07/2022 18:31 WG1828432
Chlorobenzene ND 1.00 1 03/07/2022 18:31 WG1828432
Chlorodibromomethane ND 1.00 1 03/07/2022 18:31 WG1828432
Chloroethane ND 5.00 1 03/07/2022 18:31 WG1828432
Chloroform ND 5.00 1 03/07/2022 18:31 WG1828432
Chloromethane ND 2.50 1 03/07/2022 18:31 WG1828432
2-Chlorotoluene ND 1.00 1 03/07/2022 18:31 WG1828432
4-Chlorotoluene ND 1.00 1 03/07/2022 18:31 WG1828432
1,2-Dibromo-3-Chloropropane ND 5.00 1 03/07/2022 18:31 WG1828432
1,2-Dibromoethane ND 1.00 1 03/07/2022 18:31 WG1828432
Dibromomethane ND 1.00 1 03/07/2022 18:31 WG1828432
1,2-Dichlorobenzene ND 1.00 1 03/07/2022 18:31 WG1828432
1,3-Dichlorobenzene ND 1.00 1 03/07/2022 18:31 WG1828432
1,4-Dichlorobenzene ND 1.00 1 03/07/2022 18:31 WG1828432
Dichlorodifluoromethane ND 5.00 1 03/07/2022 18:31 WG1828432
1,1-Dichloroethane ND 1.00 1 03/07/2022 18:31 WG1828432
1,2-Dichloroethane ND 1.00 1 03/07/2022 18:31 WG1828432
1,1-Dichloroethene ND 1.00 1 03/07/2022 18:31 WG1828432
cis-1,2-Dichloroethene ND 1.00 1 03/07/2022 18:31 WG1828432
trans-1,2-Dichloroethene ND 1.00 1 03/07/2022 18:31 WG1828432
1,2-Dichloropropane ND 1.00 1 03/07/2022 18:31 WG1828432
1,1-Dichloropropene ND 1.00 1 03/07/2022 18:31 WG1828432
1,3-Dichloropropane ND 1.00 1 03/07/2022 18:31 WG1828432
2,2-Dichloropropane ND 1.00 1 03/07/2022 18:31 WG1828432
Di-isopropyl ether ND 1.00 1 03/07/2022 18:31 WG1828432
Ethylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
Hexachloro-1,3-butadiene ND 1.00 1 03/07/2022 18:31 WG1828432
Isopropylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
p-Isopropyltoluene ND 1.00 1 03/07/2022 18:31 WG1828432
2-Butanone (MEK)ND 10.0 1 03/07/2022 18:31 WG1828432
Methylene Chloride ND 5.00 1 03/07/2022 18:31 WG1828432
4-Methyl-2-pentanone (MIBK)ND 10.0 1 03/07/2022 18:31 WG1828432
Methyl tert-butyl ether ND 1.00 1 03/07/2022 18:31 WG1828432
Naphthalene ND 5.00 1 03/07/2022 18:31 WG1828432
n-Propylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
Styrene ND 1.00 1 03/07/2022 18:31 WG1828432
1,1,1,2-Tetrachloroethane ND 1.00 1 03/07/2022 18:31 WG1828432
1,1,2,2-Tetrachloroethane ND 1.00 1 03/07/2022 18:31 WG1828432
Tetrachloroethene ND 1.00 1 03/07/2022 18:31 WG1828432
Toluene ND 1.00 1 03/07/2022 18:31 WG1828432
1,2,3-Trichlorobenzene ND 1.00 1 03/07/2022 18:31 WG1828432
1,2,4-Trichlorobenzene ND 1.00 1 03/07/2022 18:31 WG1828432
1,1,1-Trichloroethane ND 1.00 1 03/07/2022 18:31 WG1828432
1,1,2-Trichloroethane ND 1.00 1 03/07/2022 18:31 WG1828432
Trichloroethene ND 1.00 1 03/07/2022 18:31 WG1828432
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 13 of 28
SAMPLE RESULTS - 05
L1467957
FB-1
Collected date/time: 03/03/22 13:35
Volatile Organic Compounds (GC/MS) by Method 6200B-2011
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Trichlorofluoromethane ND 5.00 1 03/07/2022 18:31 WG1828432
1,2,3-Trichloropropane ND 2.50 1 03/07/2022 18:31 WG1828432
1,2,4-Trimethylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
1,3,5-Trimethylbenzene ND 1.00 1 03/07/2022 18:31 WG1828432
Vinyl chloride ND 1.00 1 03/07/2022 18:31 WG1828432
o-Xylene ND 1.00 1 03/07/2022 18:31 WG1828432
m&p-Xylenes ND 2.00 1 03/07/2022 18:31 WG1828432
(S) Toluene-d8 93.3 80.0-120 03/07/2022 18:31 WG1828432
(S) 4-Bromofluorobenzene 93.6 77.0-126 03/07/2022 18:31 WG1828432
(S) 1,2-Dichloroethane-d4 97.6 70.0-130 03/07/2022 18:31 WG1828432
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 14 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 14 of 28
QUALITY CONTROL SUMMARYWG1828432
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,04,05
Method Blank (MB)
(MB) R3767283-3 03/07/22 09:55
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrolein U 2.54 50.0
Acrylonitrile U 0.671 10.0
Benzene U 0.0941 1.00
Bromobenzene U 0.118 1.00
Bromodichloromethane U 0.136 1.00
Bromoform U 0.129 1.00
Bromomethane U 0.605 5.00
n-Butylbenzene U 0.157 1.00
sec-Butylbenzene U 0.125 1.00
tert-Butylbenzene U 0.127 1.00
Carbon tetrachloride U 0.128 1.00
Chlorobenzene U 0.116 1.00
Chlorodibromomethane U 0.140 1.00
Chloroethane U 0.192 5.00
Chloroform U 0.111 5.00
Chloromethane U 0.960 2.50
2-Chlorotoluene U 0.106 1.00
4-Chlorotoluene U 0.114 1.00
1,2-Dibromo-3-Chloropropane U 0.276 5.00
1,2-Dibromoethane U 0.126 1.00
Dibromomethane U 0.122 1.00
1,2-Dichlorobenzene U 0.107 1.00
1,3-Dichlorobenzene U 0.110 1.00
1,4-Dichlorobenzene U 0.120 1.00
Dichlorodifluoromethane U 0.374 5.00
1,1-Dichloroethane U 0.100 1.00
1,2-Dichloroethane U 0.0819 1.00
1,1-Dichloroethene U 0.188 1.00
cis-1,2-Dichloroethene U 0.126 1.00
trans-1,2-Dichloroethene U 0.149 1.00
1,2-Dichloropropane U 0.149 1.00
1,1-Dichloropropene U 0.142 1.00
1,3-Dichloropropane U 0.110 1.00
2,2-Dichloropropane U 0.161 1.00
Di-isopropyl ether U 0.105 1.00
Ethylbenzene U 0.137 1.00
Hexachloro-1,3-butadiene U 0.337 1.00
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 15 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 15 of 28
QUALITY CONTROL SUMMARYWG1828432
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,04,05
Method Blank (MB)
(MB) R3767283-3 03/07/22 09:55
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
2-Butanone (MEK)U 1.19 10.0
Methylene Chloride U 0.430 5.00
4-Methyl-2-pentanone (MIBK)U 0.478 10.0
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
n-Propylbenzene U 0.0993 1.00
Styrene U 0.118 1.00
1,1,1,2-Tetrachloroethane U 0.147 1.00
1,1,2,2-Tetrachloroethane U 0.133 1.00
Tetrachloroethene U 0.300 1.00
Toluene U 0.278 1.00
1,2,3-Trichlorobenzene U 0.230 1.00
1,2,4-Trichlorobenzene U 0.481 1.00
1,1,1-Trichloroethane U 0.149 1.00
1,1,2-Trichloroethane U 0.158 1.00
Trichloroethene U 0.190 1.00
Trichlorofluoromethane U 0.160 5.00
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 1.00
1,3,5-Trimethylbenzene U 0.104 1.00
Vinyl chloride U 0.234 1.00
o-Xylene U 0.174 1.00
m&p-Xylenes U 0.430 2.00
(S) Toluene-d8 100 80.0-120
(S) 4-Bromofluorobenzene 104 77.0-126
(S) 1,2-Dichloroethane-d4 103 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3767283-1 03/07/22 08:50
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Acetone 25.0 33.0 132 19.0-160
Acrolein 25.0 38.6 154 10.0-160
Acrylonitrile 25.0 35.2 141 55.0-149
Benzene 5.00 4.85 97.0 70.0-123
Bromobenzene 5.00 4.75 95.0 73.0-121
Bromodichloromethane 5.00 5.14 103 75.0-120
Bromoform 5.00 4.34 86.8 68.0-132
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 16 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 16 of 28
QUALITY CONTROL SUMMARYWG1828432
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,04,05
Laboratory Control Sample (LCS)
(LCS) R3767283-1 03/07/22 08:50
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
Bromomethane 5.00 4.46 89.2 10.0-160
n-Butylbenzene 5.00 4.77 95.4 73.0-125
sec-Butylbenzene 5.00 4.94 98.8 75.0-125
tert-Butylbenzene 5.00 4.80 96.0 76.0-124
Carbon tetrachloride 5.00 5.47 109 68.0-126
Chlorobenzene 5.00 4.86 97.2 80.0-121
Chlorodibromomethane 5.00 4.96 99.2 77.0-125
Chloroethane 5.00 5.12 102 47.0-150
Chloroform 5.00 5.70 114 73.0-120
Chloromethane 5.00 6.19 124 41.0-142
2-Chlorotoluene 5.00 4.65 93.0 76.0-123
4-Chlorotoluene 5.00 4.68 93.6 75.0-122
1,2-Dibromo-3-Chloropropane 5.00 4.46 89.2 58.0-134
1,2-Dibromoethane 5.00 4.82 96.4 80.0-122
Dibromomethane 5.00 5.20 104 80.0-120
1,2-Dichlorobenzene 5.00 5.02 100 79.0-121
1,3-Dichlorobenzene 5.00 4.90 98.0 79.0-120
1,4-Dichlorobenzene 5.00 4.64 92.8 79.0-120
Dichlorodifluoromethane 5.00 5.89 118 51.0-149
1,1-Dichloroethane 5.00 5.85 117 70.0-126
1,2-Dichloroethane 5.00 5.16 103 70.0-128
1,1-Dichloroethene 5.00 5.69 114 71.0-124
cis-1,2-Dichloroethene 5.00 5.50 110 73.0-120
trans-1,2-Dichloroethene 5.00 6.00 120 73.0-120
1,2-Dichloropropane 5.00 5.51 110 77.0-125
1,1-Dichloropropene 5.00 5.22 104 74.0-126
1,3-Dichloropropane 5.00 4.79 95.8 80.0-120
2,2-Dichloropropane 5.00 5.93 119 58.0-130
Di-isopropyl ether 5.00 6.83 137 58.0-138
Ethylbenzene 5.00 4.88 97.6 79.0-123
Hexachloro-1,3-butadiene 5.00 5.04 101 54.0-138
Isopropylbenzene 5.00 4.80 96.0 76.0-127
p-Isopropyltoluene 5.00 4.81 96.2 76.0-125
2-Butanone (MEK)25.0 32.1 128 44.0-160
Methylene Chloride 5.00 5.47 109 67.0-120
4-Methyl-2-pentanone (MIBK)25.0 30.9 124 68.0-142
Methyl tert-butyl ether 5.00 5.64 113 68.0-125
Naphthalene 5.00 4.52 90.4 54.0-135
n-Propylbenzene 5.00 4.78 95.6 77.0-124
Styrene 5.00 4.28 85.6 73.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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QUALITY CONTROL SUMMARYWG1828432
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,04,05
Laboratory Control Sample (LCS)
(LCS) R3767283-1 03/07/22 08:50
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
1,1,1,2-Tetrachloroethane 5.00 4.86 97.2 75.0-125
1,1,2,2-Tetrachloroethane 5.00 5.12 102 65.0-130
Tetrachloroethene 5.00 5.07 101 72.0-132
Toluene 5.00 4.68 93.6 79.0-120
1,2,3-Trichlorobenzene 5.00 4.67 93.4 50.0-138
1,2,4-Trichlorobenzene 5.00 4.41 88.2 57.0-137
1,1,1-Trichloroethane 5.00 5.26 105 73.0-124
1,1,2-Trichloroethane 5.00 5.06 101 80.0-120
Trichloroethene 5.00 5.31 106 78.0-124
Trichlorofluoromethane 5.00 6.02 120 59.0-147
1,2,3-Trichloropropane 5.00 4.94 98.8 73.0-130
1,2,4-Trimethylbenzene 5.00 4.81 96.2 76.0-121
1,3,5-Trimethylbenzene 5.00 4.76 95.2 76.0-122
Vinyl chloride 5.00 5.42 108 67.0-131
o-Xylene 5.00 4.85 97.0 80.0-122
m&p-Xylenes 10.0 9.99 99.9 80.0-122
(S) Toluene-d8 96.9 80.0-120
(S) 4-Bromofluorobenzene 99.9 77.0-126
(S) 1,2-Dichloroethane-d4 106 70.0-130
L1467499-07 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)
(OS) L1467499-07 03/07/22 10:35 • (MS) R3767283-4 03/07/22 10:57 • (MSD) R3767283-5 03/07/22 11:18
Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l ug/l %%%%%
Acetone 25.0 ND ND ND 139 131 1 10.0-160 6.22 35
Acrolein 25.0 ND ND ND 174 168 1 10.0-160 J5 J5 3.74 39
Acrylonitrile 25.0 ND 33.8 33.1 135 132 1 21.0-160 2.09 32
Benzene 5.00 ND 5.03 4.74 101 94.8 1 17.0-158 5.94 27
Bromobenzene 5.00 ND 4.67 4.81 93.4 96.2 1 30.0-149 2.95 28
Bromodichloromethane 5.00 ND 5.24 5.05 105 101 1 31.0-150 3.69 27
Bromoform 5.00 ND 4.52 4.44 90.4 88.8 1 29.0-150 1.79 29
Bromomethane 5.00 ND ND ND 94.4 87.6 1 10.0-160 7.47 38
n-Butylbenzene 5.00 ND 5.41 4.96 108 99.2 1 31.0-150 8.68 30
sec-Butylbenzene 5.00 ND 5.31 4.93 106 98.6 1 33.0-155 7.42 29
tert-Butylbenzene 5.00 ND 5.20 4.95 104 99.0 1 34.0-153 4.93 28
Carbon tetrachloride 5.00 ND 5.97 5.36 119 107 1 23.0-159 10.8 28
Chlorobenzene 5.00 ND 5.15 4.82 103 96.4 1 33.0-152 6.62 27
Chlorodibromomethane 5.00 ND 4.88 4.83 97.6 96.6 1 37.0-149 1.03 27
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1828432
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,04,05
L1467499-07 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)
(OS) L1467499-07 03/07/22 10:35 • (MS) R3767283-4 03/07/22 10:57 • (MSD) R3767283-5 03/07/22 11:18
Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l ug/l %%%%%
Chloroethane 5.00 ND 5.22 5.05 104 101 1 10.0-160 3.31 30
Chloroform 5.00 ND 5.93 5.31 119 106 1 29.0-154 11.0 28
Chloromethane 5.00 ND 6.65 6.20 133 124 1 10.0-160 7.00 29
2-Chlorotoluene 5.00 ND 4.88 4.66 97.6 93.2 1 32.0-153 4.61 28
4-Chlorotoluene 5.00 ND 4.99 4.72 99.8 94.4 1 32.0-150 5.56 28
1,2-Dibromo-3-Chloropropane 5.00 ND ND ND 89.2 94.2 1 22.0-151 5.45 34
1,2-Dibromoethane 5.00 ND 4.82 4.78 96.4 95.6 1 34.0-147 0.833 27
Dibromomethane 5.00 ND 5.18 5.24 104 105 1 30.0-151 1.15 27
1,2-Dichlorobenzene 5.00 ND 4.93 4.91 98.6 98.2 1 34.0-149 0.406 28
1,3-Dichlorobenzene 5.00 ND 5.02 4.89 100 97.8 1 36.0-146 2.62 27
1,4-Dichlorobenzene 5.00 ND 4.82 4.65 96.4 93.0 1 35.0-142 3.59 27
Dichlorodifluoromethane 5.00 ND 7.06 6.32 141 126 1 10.0-160 11.1 29
1,1-Dichloroethane 5.00 ND 5.95 5.01 119 100 1 25.0-158 17.2 27
1,2-Dichloroethane 5.00 ND 5.18 5.23 104 105 1 29.0-151 0.961 27
1,1-Dichloroethene 5.00 ND 5.82 5.13 116 103 1 11.0-160 12.6 29
cis-1,2-Dichloroethene 5.00 ND 5.69 5.11 114 102 1 10.0-160 10.7 27
trans-1,2-Dichloroethene 5.00 ND 6.38 5.20 128 104 1 17.0-153 20.4 27
1,2-Dichloropropane 5.00 ND 5.64 5.45 113 109 1 30.0-156 3.43 27
1,1-Dichloropropene 5.00 ND 6.09 5.37 122 107 1 25.0-158 12.6 27
1,3-Dichloropropane 5.00 ND 4.97 4.97 99.4 99.4 1 38.0-147 0.000 27
2,2-Dichloropropane 5.00 ND 6.58 5.71 132 114 1 24.0-152 14.2 29
Di-isopropyl ether 5.00 ND 6.75 6.25 135 125 1 21.0-160 7.69 28
Ethylbenzene 5.00 ND 5.14 4.82 103 96.4 1 30.0-155 6.43 27
Hexachloro-1,3-butadiene 5.00 ND 5.71 5.35 114 107 1 20.0-154 6.51 34
Isopropylbenzene 5.00 ND 5.61 5.19 112 104 1 28.0-157 7.78 27
p-Isopropyltoluene 5.00 ND 5.35 4.94 107 98.8 1 30.0-154 7.97 29
2-Butanone (MEK)25.0 ND 35.1 34.0 140 136 1 10.0-160 3.18 32
Methylene Chloride 5.00 ND 5.61 ND 112 96.8 1 23.0-144 14.7 28
4-Methyl-2-pentanone (MIBK)25.0 ND 32.1 31.3 128 125 1 29.0-160 2.52 29
Methyl tert-butyl ether 5.00 ND 5.52 5.21 110 104 1 28.0-150 5.78 29
Naphthalene 5.00 ND ND ND 85.2 87.6 1 12.0-156 2.78 35
n-Propylbenzene 5.00 ND 5.09 4.81 102 96.2 1 31.0-154 5.66 28
Styrene 5.00 ND 4.68 4.39 93.6 87.8 1 33.0-155 6.39 28
1,1,1,2-Tetrachloroethane 5.00 ND 5.10 5.01 102 100 1 36.0-151 1.78 29
1,1,2,2-Tetrachloroethane 5.00 ND 5.25 5.29 105 106 1 33.0-150 0.759 28
Tetrachloroethene 5.00 ND 5.57 5.06 111 101 1 10.0-160 9.60 27
Toluene 5.00 ND 5.00 4.65 100 93.0 1 26.0-154 7.25 28
1,2,3-Trichlorobenzene 5.00 ND 4.53 4.77 90.6 95.4 1 17.0-150 5.16 36
1,2,4-Trichlorobenzene 5.00 ND 4.52 4.47 90.4 89.4 1 24.0-150 1.11 33
1,1,1-Trichloroethane 5.00 ND 6.04 5.38 121 108 1 23.0-160 11.6 28
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1828432
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,04,05
L1467499-07 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)
(OS) L1467499-07 03/07/22 10:35 • (MS) R3767283-4 03/07/22 10:57 • (MSD) R3767283-5 03/07/22 11:18
Spike Amount Original Result MS Result MSD Result MS Rec.MSD Rec.Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l ug/l %%%%%
1,1,2-Trichloroethane 5.00 ND 5.21 5.01 104 100 1 35.0-147 3.91 27
Trichloroethene 5.00 ND 5.51 5.19 110 104 1 10.0-160 5.98 25
Trichlorofluoromethane 5.00 ND 6.73 6.12 135 122 1 17.0-160 9.49 31
1,2,3-Trichloropropane 5.00 ND 5.10 5.13 102 103 1 34.0-151 0.587 29
1,2,4-Trimethylbenzene 5.00 ND 5.01 4.80 100 96.0 1 26.0-154 4.28 27
1,3,5-Trimethylbenzene 5.00 ND 5.02 4.72 100 94.4 1 28.0-153 6.16 27
Vinyl chloride 5.00 ND 5.99 5.59 120 112 1 10.0-160 6.91 27
o-Xylene 5.00 ND 5.24 4.89 105 97.8 1 45.0-144 6.91 26
m&p-Xylenes 10.0 ND 10.6 10.1 106 101 1 43.0-146 4.83 26
(S) Toluene-d8 96.1 97.0 80.0-120
(S) 4-Bromofluorobenzene 109 111 77.0-126
(S) 1,2-Dichloroethane-d4 105 106 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1828778
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,02,03,04
Method Blank (MB)
(MB) R3768080-4 03/08/22 17:59
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 50.0
Acrolein U 2.54 50.0
Acrylonitrile U 0.671 10.0
Benzene U 0.0941 1.00
Bromobenzene U 0.118 1.00
Bromodichloromethane U 0.136 1.00
Bromoform U 0.129 1.00
Bromomethane U 0.605 5.00
n-Butylbenzene U 0.157 1.00
sec-Butylbenzene U 0.125 1.00
tert-Butylbenzene U 0.127 1.00
Carbon tetrachloride U 0.128 1.00
Chlorobenzene U 0.116 1.00
Chlorodibromomethane U 0.140 1.00
Chloroethane U 0.192 5.00
Chloroform U 0.111 5.00
Chloromethane U 0.960 2.50
2-Chlorotoluene U 0.106 1.00
4-Chlorotoluene U 0.114 1.00
1,2-Dibromo-3-Chloropropane U 0.276 5.00
1,2-Dibromoethane U 0.126 1.00
Dibromomethane U 0.122 1.00
1,2-Dichlorobenzene U 0.107 1.00
1,3-Dichlorobenzene U 0.110 1.00
1,4-Dichlorobenzene U 0.120 1.00
Dichlorodifluoromethane U 0.374 5.00
1,1-Dichloroethane U 0.100 1.00
1,2-Dichloroethane U 0.0819 1.00
1,1-Dichloroethene U 0.188 1.00
cis-1,2-Dichloroethene U 0.126 1.00
trans-1,2-Dichloroethene U 0.149 1.00
1,2-Dichloropropane U 0.149 1.00
1,1-Dichloropropene U 0.142 1.00
1,3-Dichloropropane U 0.110 1.00
2,2-Dichloropropane U 0.161 1.00
Di-isopropyl ether U 0.105 1.00
Ethylbenzene U 0.137 1.00
Hexachloro-1,3-butadiene U 0.337 1.00
Isopropylbenzene U 0.105 1.00
p-Isopropyltoluene U 0.120 1.00
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1828778
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,02,03,04
Method Blank (MB)
(MB) R3768080-4 03/08/22 17:59
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
2-Butanone (MEK)U 1.19 10.0
Methylene Chloride U 0.430 5.00
4-Methyl-2-pentanone (MIBK)U 0.478 10.0
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
n-Propylbenzene U 0.0993 1.00
Styrene U 0.118 1.00
1,1,1,2-Tetrachloroethane U 0.147 1.00
1,1,2,2-Tetrachloroethane U 0.133 1.00
Tetrachloroethene U 0.300 1.00
Toluene U 0.278 1.00
1,2,3-Trichlorobenzene U 0.230 1.00
1,2,4-Trichlorobenzene U 0.481 1.00
1,1,1-Trichloroethane U 0.149 1.00
1,1,2-Trichloroethane U 0.158 1.00
Trichloroethene U 0.190 1.00
Trichlorofluoromethane U 0.160 5.00
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 1.00
1,3,5-Trimethylbenzene U 0.104 1.00
Vinyl chloride U 0.234 1.00
o-Xylene U 0.174 1.00
m&p-Xylenes U 0.430 2.00
(S) Toluene-d8 103 80.0-120
(S) 4-Bromofluorobenzene 102 77.0-126
(S) 1,2-Dichloroethane-d4 96.0 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3768080-1 03/08/22 16:33 • (LCSD) R3768080-2 03/08/22 16:54
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Acetone 25.0 30.1 30.4 120 122 19.0-160 0.992 27
Acrolein 25.0 31.1 32.2 124 129 10.0-160 3.48 26
Acrylonitrile 25.0 29.4 29.2 118 117 55.0-149 0.683 20
Benzene 5.00 4.69 4.62 93.8 92.4 70.0-123 1.50 20
Bromobenzene 5.00 4.68 4.49 93.6 89.8 73.0-121 4.14 20
Bromodichloromethane 5.00 4.78 5.06 95.6 101 75.0-120 5.69 20
Bromoform 5.00 3.85 4.23 77.0 84.6 68.0-132 9.41 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1828778
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,02,03,04
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3768080-1 03/08/22 16:33 • (LCSD) R3768080-2 03/08/22 16:54
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Bromomethane 5.00 3.80 4.12 76.0 82.4 10.0-160 8.08 25
n-Butylbenzene 5.00 4.94 4.84 98.8 96.8 73.0-125 2.04 20
sec-Butylbenzene 5.00 4.96 4.92 99.2 98.4 75.0-125 0.810 20
tert-Butylbenzene 5.00 4.83 4.85 96.6 97.0 76.0-124 0.413 20
Carbon tetrachloride 5.00 4.90 5.07 98.0 101 68.0-126 3.41 20
Chlorobenzene 5.00 4.80 4.78 96.0 95.6 80.0-121 0.418 20
Chlorodibromomethane 5.00 4.39 4.68 87.8 93.6 77.0-125 6.39 20
Chloroethane 5.00 4.77 4.91 95.4 98.2 47.0-150 2.89 20
Chloroform 5.00 5.05 5.00 101 100 73.0-120 0.995 20
Chloromethane 5.00 5.32 5.81 106 116 41.0-142 8.81 20
2-Chlorotoluene 5.00 4.69 4.45 93.8 89.0 76.0-123 5.25 20
4-Chlorotoluene 5.00 4.52 4.59 90.4 91.8 75.0-122 1.54 20
1,2-Dibromo-3-Chloropropane 5.00 4.42 4.05 88.4 81.0 58.0-134 8.74 20
1,2-Dibromoethane 5.00 4.80 4.89 96.0 97.8 80.0-122 1.86 20
Dibromomethane 5.00 4.85 5.19 97.0 104 80.0-120 6.77 20
1,2-Dichlorobenzene 5.00 5.05 4.76 101 95.2 79.0-121 5.91 20
1,3-Dichlorobenzene 5.00 4.88 4.72 97.6 94.4 79.0-120 3.33 20
1,4-Dichlorobenzene 5.00 4.73 4.61 94.6 92.2 79.0-120 2.57 20
Dichlorodifluoromethane 5.00 5.47 6.06 109 121 51.0-149 10.2 20
1,1-Dichloroethane 5.00 4.78 4.93 95.6 98.6 70.0-126 3.09 20
1,2-Dichloroethane 5.00 4.84 4.85 96.8 97.0 70.0-128 0.206 20
1,1-Dichloroethene 5.00 4.73 4.93 94.6 98.6 71.0-124 4.14 20
cis-1,2-Dichloroethene 5.00 4.85 4.83 97.0 96.6 73.0-120 0.413 20
trans-1,2-Dichloroethene 5.00 5.04 5.08 101 102 73.0-120 0.791 20
1,2-Dichloropropane 5.00 5.30 5.58 106 112 77.0-125 5.15 20
1,1-Dichloropropene 5.00 5.09 5.08 102 102 74.0-126 0.197 20
1,3-Dichloropropane 5.00 4.79 5.12 95.8 102 80.0-120 6.66 20
2,2-Dichloropropane 5.00 4.98 5.00 99.6 100 58.0-130 0.401 20
Di-isopropyl ether 5.00 5.51 5.63 110 113 58.0-138 2.15 20
Ethylbenzene 5.00 4.84 4.87 96.8 97.4 79.0-123 0.618 20
Hexachloro-1,3-butadiene 5.00 4.87 4.77 97.4 95.4 54.0-138 2.07 20
Isopropylbenzene 5.00 4.67 5.16 93.4 103 76.0-127 9.97 20
p-Isopropyltoluene 5.00 4.95 4.85 99.0 97.0 76.0-125 2.04 20
2-Butanone (MEK)25.0 31.9 31.5 128 126 44.0-160 1.26 20
Methylene Chloride 5.00 4.55 4.75 91.0 95.0 67.0-120 4.30 20
4-Methyl-2-pentanone (MIBK)25.0 28.4 31.1 114 124 68.0-142 9.08 20
Methyl tert-butyl ether 5.00 4.76 4.72 95.2 94.4 68.0-125 0.844 20
Naphthalene 5.00 4.51 4.26 90.2 85.2 54.0-135 5.70 20
n-Propylbenzene 5.00 4.84 4.65 96.8 93.0 77.0-124 4.00 20
Styrene 5.00 4.01 4.50 80.2 90.0 73.0-130 11.5 20
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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QUALITY CONTROL SUMMARYWG1828778
Volatile Organic Compounds (GC/MS) by Method 6200B-2011 L1467957-01,02,03,04
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R3768080-1 03/08/22 16:33 • (LCSD) R3768080-2 03/08/22 16:54
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
1,1,1,2-Tetrachloroethane 5.00 4.70 4.80 94.0 96.0 75.0-125 2.11 20
1,1,2,2-Tetrachloroethane 5.00 4.85 4.59 97.0 91.8 65.0-130 5.51 20
Tetrachloroethene 5.00 4.74 5.22 94.8 104 72.0-132 9.64 20
Toluene 5.00 4.42 5.08 88.4 102 79.0-120 13.9 20
1,2,3-Trichlorobenzene 5.00 4.68 4.41 93.6 88.2 50.0-138 5.94 20
1,2,4-Trichlorobenzene 5.00 4.46 4.11 89.2 82.2 57.0-137 8.17 20
1,1,1-Trichloroethane 5.00 5.19 5.17 104 103 73.0-124 0.386 20
1,1,2-Trichloroethane 5.00 4.80 5.29 96.0 106 80.0-120 9.71 20
Trichloroethene 5.00 5.24 5.38 105 108 78.0-124 2.64 20
Trichlorofluoromethane 5.00 5.14 5.47 103 109 59.0-147 6.22 20
1,2,3-Trichloropropane 5.00 5.12 4.80 102 96.0 73.0-130 6.45 20
1,2,4-Trimethylbenzene 5.00 4.93 4.84 98.6 96.8 76.0-121 1.84 20
1,3,5-Trimethylbenzene 5.00 4.73 4.54 94.6 90.8 76.0-122 4.10 20
Vinyl chloride 5.00 4.89 5.47 97.8 109 67.0-131 11.2 20
o-Xylene 5.00 4.50 5.00 90.0 100 80.0-122 10.5 20
m&p-Xylenes 10.0 9.82 10.1 98.2 101 80.0-122 2.81 20
(S) Toluene-d8 92.4 105 80.0-120
(S) 4-Bromofluorobenzene 96.7 106 77.0-126
(S) 1,2-Dichloroethane-d4 102 101 70.0-130
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report
The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not
intended as a comprehensive explanation, and if you have additional questions please contact your project representative.
Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name,
Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and
Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.
Abbreviations and Definitions
MDL Method Detection Limit.
ND Not detected at the Reporting Limit (or MDL where applicable).
RDL Reported Detection Limit.
Rec.Recovery.
RPD Relative Percent Difference.
SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and
Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be
detected in all environmental media.
U Not detected at the Reporting Limit (or MDL where applicable).
Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes
reported.
Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the
standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the
laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the
result reported has already been corrected for this factor.
Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal
for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or
duplicated within these ranges.
Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control
sample. The Original Sample may not be included within the reported SDG.
Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result
reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and
potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.
Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was
no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL”
(Below Detectable Levels). The information in the results column should always be accompanied by either an MDL
(Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect
or report for this analyte.
Uncertainty
(Radiochemistry)Confidence level of 2 sigma.
Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol
observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will
be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.
Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or
analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not
being performed on your samples typically, but on laboratory generated material.
Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and
date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This
chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the
samples from the time of collection until delivery to the laboratory for analysis.
Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided
by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for
each sample will provide the name and method number for the analysis reported.
Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and
times of preparation and/or analysis.
Qualifier Description
J5 The sample matrix interfered with the ability to make any accurate determination; spike value is high.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 25 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 25 of 28

Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122
Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
Georgia NELAP North Carolina ³41
Georgia ¹923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶KY90010 South Carolina 84004002
Kentucky ²16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003
ACCREDITATIONS & LOCATIONS

¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable
* Not all certifications held by the laboratory are applicable to the results reported in the attached report.
* Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical.
1 Cp
2Tc
3Ss
4Cn
5Sr
6Qc
7Gl
8Al
9Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/09/22 17:27 26 of 28
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Greensboro, NC 75207123 L1467957 03/10/22 09:20 26 of 28

APPENDIX C
AQTESOLV Results
0.400.800.1.2E+3 1.6E+3 2.0E+3
0.001
0.01
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW1 Slug In.aqt
Date:04/07/22 Time:19:18:53
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:46.7 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-1)
Initial Displacement:0.349 ft Static Water Column Height:8.7 ft
Total Well Penetration Depth:8.7 ft Screen Length:8.7 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0001555 ft/min y0 =0.4169 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW1 Slug In.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:23:33
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 46.7 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-1
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 0.349 ft
Static Water Column Height: 8.7 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 8.7 ft
Total Well Penetration Depth: 8.7 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 36
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
12.0.399.0.187
24.6 0.326 435.0.165
38.11 0.349 471.0.154
52.2 0.321 513.0.151
67.2 0.301 555.0.12
82.8 0.288 597.0.134
99.6 0.307 645.0.149
117.6 0.286 699.0.107
136.2 0.275 747.0.108
156.6 0.263 807.0.108
177.6 0.22 867.0.098
199.8 0.23 927.0.076
223.8 0.25 987.0.087
249.0.228 1047.0.057
04/07/22 1 19:23:33
AQTESOLV for Windows M&P Grocery
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
275.4 0.221 1107.0.036
303.6 0.214 1167.0.028
333.6 0.187 1227.0.034
365.4 0.191 1287.0.027
SOLUTION
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 3.105
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0001555 ft/min
y0 0.4169 ft
K = 7.898E-5 cm/sec
T = K*b = 0.007261 ft²/min (0.1124 sq. cm/sec)
04/07/22 2 19:23:33
0.120.240.360.480.600.
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW1 Slug Out.aqt
Date:04/07/22 Time:19:26:39
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:46.7 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-1)
Initial Displacement:0.922 ft Static Water Column Height:8.7 ft
Total Well Penetration Depth:8.7 ft Screen Length:8.7 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0001304 ft/min y0 =0.3189 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW1 Slug Out.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:27:08
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 46.7 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-1
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 0.922 ft
Static Water Column Height: 8.7 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 8.7 ft
Total Well Penetration Depth: 8.7 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 32
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
6.0.917 167.4 0.281
12.0.8 183.1 0.242
18.6 0.691 199.8 0.234
25.8 0.616 217.8 0.247
33.6 0.555 236.4 0.209
41.4 0.51 256.8 0.21
49.8 0.492 277.8 0.223
58.8 0.468 300.0.188
68.4 0.414 324.0.195
78.0.421 349.2 0.169
88.8 0.362 375.6 0.216
100.2 0.321 403.8 0.193
112.2 0.33 433.8 0.182
124.8 0.311 465.6 0.152
04/07/22 1 19:27:08
AQTESOLV for Windows M&P Grocery
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
138.0.272 499.2 0.19
152.4 0.306 535.2 0.173
SOLUTION
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 3.105
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0001304 ft/min
y0 0.3189 ft
K = 6.625E-5 cm/sec
T = K*b = 0.00609 ft²/min (0.0943 sq. cm/sec)
04/07/22 2 19:27:08
0.140.280.420.560.700.
0.001
0.01
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW2 Slug In.aqt
Date:04/07/22 Time:19:32:39
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:44.2 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-2)
Initial Displacement:0.977 ft Static Water Column Height:9.2 ft
Total Well Penetration Depth:9.2 ft Screen Length:9.2 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0002196 ft/min y0 =0.2754 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW2 Slug In.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:33:19
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 44.2 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-2
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 0.977 ft
Static Water Column Height: 9.2 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 9.2 ft
Total Well Penetration Depth: 9.2 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 22
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
15.6 0.266.4 0.148
32.4 0.114 298.2 0.119
50.4 0.977 331.8 0.084
69.19 0.291 367.8 0.101
89.4 0.241 403.8 0.119
110.4 0.162 445.8 0.136
132.6 0.239 487.8 0.118
156.6 0.193 529.8 0.099
181.8 0.146 577.8 0.078
208.2 0.149 631.8 0.054
236.4 0.171 679.8 0.089
SOLUTION
04/07/22 1 19:33:19
AQTESOLV for Windows M&P Grocery
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 3.152
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0002196 ft/min
y0 0.2754 ft
K = 0.0001116 cm/sec
T = K*b = 0.009707 ft²/min (0.1503 sq. cm/sec)
04/07/22 2 19:33:19
0.100.200.300.400.500.
0.001
0.01
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW2 Slug Out.aqt
Date:04/07/22 Time:19:37:19
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:44.2 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-2)
Initial Displacement:0.526 ft Static Water Column Height:9.2 ft
Total Well Penetration Depth:9.2 ft Screen Length:9.2 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0001386 ft/min y0 =0.2134 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW2 Slug Out.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:37:35
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 44.2 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-2
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 0.526 ft
Static Water Column Height: 9.2 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 9.2 ft
Total Well Penetration Depth: 9.2 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 31
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
6.131 0.001 158.4 0.176
12.0.148 173.4 0.185
18.0.527 189.0.168
24.6 0.332 205.8 0.19
31.8 0.261 223.8 0.185
39.6 0.217 242.4 0.184
47.4 0.197 262.8 0.191
55.8 0.174 283.8 0.159
64.8 0.177 306.0.173
74.4 0.152 330.0.126
84.0.201 355.2 0.146
94.8 0.189 381.9 0.128
106.3 0.155 409.8 0.145
118.2 0.187 439.8 0.168
04/07/22 1 19:37:36
AQTESOLV for Windows M&P Grocery
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
130.8 0.198 471.6 0.145
144.0.218
SOLUTION
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 3.152
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0001386 ft/min
y0 0.2134 ft
K = 7.039E-5 cm/sec
T = K*b = 0.006125 ft²/min (0.09483 sq. cm/sec)
04/07/22 2 19:37:36
0.140.280.420.560.700.
0.001
0.01
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW3 Slug In.aqt
Date:04/07/22 Time:19:40:40
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:46.2 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-3)
Initial Displacement:0.814 ft Static Water Column Height:11.2 ft
Total Well Penetration Depth:12.4 ft Screen Length:11.2 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0002196 ft/min y0 =0.4365 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW3 Slug In.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:41:00
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 46.2 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-3
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 0.814 ft
Static Water Column Height: 11.2 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 11.2 ft
Total Well Penetration Depth: 12.4 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 21
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
16.8 0.282.6 0.121
34.8 0.814 316.2 0.128
53.4 0.658 352.2 0.153
73.8 0.562 388.2 0.158
94.8 0.441 430.3 0.13
117.0.365 472.2 0.098
141.0.3 514.2 0.11
166.2 0.29 562.2 0.104
192.6 0.244 616.2 0.115
220.8 0.232 664.2 0.104
250.8 0.201
SOLUTION
04/07/22 1 19:41:00
AQTESOLV for Windows M&P Grocery
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 3.371
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0002196 ft/min
y0 0.4365 ft
K = 0.0001116 cm/sec
T = K*b = 0.01015 ft²/min (0.1571 sq. cm/sec)
04/07/22 2 19:41:00
0.100.200.300.400.500.
0.01
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW3 Slug Out.aqt
Date:04/07/22 Time:19:42:07
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:46.2 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-3)
Initial Displacement:0.62 ft Static Water Column Height:11.2 ft
Total Well Penetration Depth:12.4 ft Screen Length:11.2 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0003481 ft/min y0 =0.3467 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW3 Slug Out.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:42:34
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 46.2 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-3
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 0.62 ft
Static Water Column Height: 11.2 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 11.2 ft
Total Well Penetration Depth: 12.4 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 33
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
4.8 0.028 145.8 0.192
10.2 0.648 159.0.161
15.0.558 173.4 0.155
21.0.52 188.4 0.117
27.0.507 204.0.095
33.0.469 220.8 0.103
39.6 0.418 238.8 0.118
46.8 0.374 257.4 0.083
54.6 0.357 277.8 0.08
62.4 0.377 298.8 0.089
70.8 0.311 321.0.085
79.8 0.283 345.0.069
89.4 0.268 370.2 0.066
99.0.235 396.6 0.096
04/07/22 1 19:42:34
AQTESOLV for Windows M&P Grocery
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
109.8 0.222 424.8 0.083
121.2 0.223 454.8 0.069
133.2 0.189
SOLUTION
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 3.371
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0003481 ft/min
y0 0.3467 ft
K = 0.0001768 cm/sec
T = K*b = 0.01608 ft²/min (0.249 sq. cm/sec)
04/07/22 2 19:42:34
0.100.200.300.400.500.
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW4 Slug In.aqt
Date:04/07/22 Time:19:43:20
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:33.4 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-4)
Initial Displacement:0.771 ft Static Water Column Height:7.1 ft
Total Well Penetration Depth:7.1 ft Screen Length:7.1 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0001386 ft/min y0 =0.2884 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW4 Slug In.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:43:52
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 33.4 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-4
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 0.771 ft
Static Water Column Height: 7.1 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 7.1 ft
Total Well Penetration Depth: 7.1 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 55
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
1.141 0.565 81.92 0.244
2.341 0.771 87.84 0.276
3.601 0.35 93.84 0.283
4.92 0.309 100.4 0.296
6.361 0.085 107.6 0.298
7.861 0.289 115.4 0.257
9.42 0.275 123.2 0.274
11.1 0.299 131.6 0.418
12.9 0.23 140.6 0.288
14.76 0.283 150.2 0.246
16.82 0.263 159.8 0.286
18.9 0.278 170.6 0.29
21.12 0.25 182.0.309
23.52 0.292 194.0.279
04/07/22 1 19:43:52
AQTESOLV for Windows M&P Grocery
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
26.04 0.274 206.6 0.269
28.68 0.261 219.8 0.302
31.5 0.297 234.2 0.278
34.5 0.28 249.2 0.252
37.68 0.269 264.8 0.314
41.04 0.258 281.6 0.231
44.64 0.268 299.6 0.317
48.24 0.256 318.2 0.264
52.44 0.272 338.6 0.273
56.89 0.288 359.6 0.247
60.84 0.229 381.8 0.271
65.64 0.284 405.8 0.249
71.04 0.285 431.0.297
75.84 0.269
SOLUTION
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 2.951
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0001386 ft/min
y0 0.2884 ft
K = 7.039E-5 cm/sec
T = K*b = 0.004628 ft²/min (0.07166 sq. cm/sec)
04/07/22 2 19:43:52
0.40.80.120.160.200.
0.1
1.
Time (sec)Normalized Head (ft/ft)M&P GROCERY
Data Set:E:\...\MW4 Slug Out.aqt
Date:04/07/22 Time:19:52:49
PROJECT INFORMATION
Company:Terracon
Client:NCDEQ
Project:75207123
Location:Lansing, NC
Test Well:MW-1
Test Date:3/3/22
AQUIFER DATA
Saturated Thickness:43.4 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-4)
Initial Displacement:1.206 ft Static Water Column Height:7.127 ft
Total Well Penetration Depth:7.127 ft Screen Length:7.127 ft
Casing Radius:0.083 ft Well Radius:0.083 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =0.0001555 ft/min y0 =0.3311 ft
AQTESOLV for Windows M&P Grocery
Data Set: E:\Projects\2020\75207123\Working Files\Diagrams-Drawings-Figures\TA-02\Model\AQTESOLV\MW4 Slug Out.aqt
Title: M&P Grocery
Date: 04/07/22
Time: 19:53:04
PROJECT INFORMATION
Company: Terracon
Client: NCDEQ
Project: 75207123
Location: Lansing, NC
Test Date: 3/3/22
Test Well: MW-1
AQUIFER DATA
Saturated Thickness: 43.4 ft
Anisotropy Ratio (Kz/Kr): 1.
SLUG TEST WELL DATA
Test Well:MW-4
X Location: 0. ft
Y Location: 0. ft
Initial Displacement: 1.206 ft
Static Water Column Height: 7.127 ft
Casing Radius: 0.083 ft
Well Radius: 0.083 ft
Well Skin Radius: 0.083 ft
Screen Length: 7.127 ft
Total Well Penetration Depth: 7.127 ft
Corrected Casing Radius (Bouwer-Rice Method): 0.083 ft
Gravel Pack Porosity: 0.
No. of Observations: 38
Observation Data
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
1.353 1.261 48.84 0.288
2.76 0.884 53.14 0.291
4.26 0.696 57.24 0.256
5.819 0.476 62.04 0.278
7.5 0.422 67.44 0.262
9.299 0.386 72.24 0.267
11.16 0.33 78.24 0.282
13.2 0.333 84.24 0.261
15.3 0.388 90.24 0.317
17.52 0.3 96.84 0.308
19.92 0.321 104.0.221
22.44 0.324 111.8 0.29
25.08 0.324 119.6 0.294
28.11 0.3 128.3 0.295
04/07/22 1 19:53:04
AQTESOLV for Windows M&P Grocery
Time (sec)Displacement (ft)Time (sec)Displacement (ft)
30.9 0.299 137.0.268
34.08 0.33 146.6 0.282
37.44 0.307 156.2 0.28
41.04 0.346 167.0.252
44.64 0.263 178.4 0.267
SOLUTION
Slug Test
Aquifer Model: Unconfined
Solution Method: Bouwer-Rice
ln(Re/rw): 2.938
VISUAL ESTIMATION RESULTS
Estimated Parameters
Parameter Estimate
K 0.0001555 ft/min
y0 0.3311 ft
K = 7.898E-5 cm/sec
T = K*b = 0.006748 ft²/min (0.1045 sq. cm/sec)
04/07/22 2 19:53:04

APPENDIX D
RBCA Toolkit Model Results

RBCA Tool Kit for Chemical Releases, Version 2.6
##4. RBCA Evaluation Process
1. Project Information
Site Name:
Location:
Completed By:
Date:15-Mar-22 Job ID:75207123
2. Which Type of RBCA Analysis?
#####
#####
#####
3. Calculation Options
###
###
Individual Constituent Risk Goals Only
Individual and Cumulative Risk Goals 5. Commands and Options
Apply Source Depletion Algorithm
Time to Future Exposure 0 (yr)
Terracon Consultants, Inc.
Lansing, NC
MP Grocery
Baseline Risks (Forward mode)
RBCA Cleanup Levels (Backward mode)
Main Screen
Affects which input data are required
Prepare Input Data Review Output
Data Complete? ( = yes, = no)
Site-Specific
Target Levels
Risk-Based
Screening
Levels
Tier Tier 2/3
RBCA Tool Kit for Chemical Releases© 2011 GSI Environmental Inc.Version 2.6
User Chemical
Database
?
Print Sheet
New Site
QuitHelp
Sav e Data
?
Set Units Print
Load Data...
Exposure Pathways
Air ParametersAir Parameters
GW Parameters
Soil ParametersSoil Parameters
Transport Models
Constituents of Concern
(COCs)
Exposure Flowchart
COC Chem. Parameters
Input Data Summary
User-Spec. COC Data...
Transient Domenico Analysis...
Baseline Risks...
Cleanup Levels...
RBCA Tool Kit for Chemical Releases, Version 2.6
#Site Name: MP Grocery
Location: Lansing, NC
1. Groundwater Exposure Compl. By: Terracon Consultants, Inc.
Groundwater Ingestion/Job ID: 75207123 Date: 15-Mar-22
Surface Water Impact 3. Air Exposure
Receptor: to Outdoor Air Inhalation
On-site Off-site1 Off-site2 Receptor:
Distance:0 50 200 (ft)On-site Off-site1 Off-site2
Source Media:Distance:0 0 0 (ft)
Affected Groundwater Source Media:Construction worker
Affected Soils Leaching to Groundwater Affected Soils--Volatilization to Ambient Outdoor Air
Option:Affected Groundwater--Volatilization to Ambient Outdoor Air
Apply MCL value as ingestion RBEL (backward mode only)Affected Surface Soils--Particulates to Ambient Outdoor Air
GW Discharge to Surface Water Exposure Volatilization to Indoor Air Inhalation
Swimming Receptor:
Fish Consumption On-site Off-site1 Off-site2
Specified Water Quality Criteria Source Media:Distance:0 0 0 (ft)
Affected Soils--Volatilization to Enclosed Space
Affected Soils Leaching to GW--Volatilization to Enclosed Space
2. Surface Soil Exposure Affected Groundwater--Volatilization to Enclosed SpaceSource Media:
Receptor: Direct Ingestion 4. Commands and Options
On-site Dermal Contact
Construction Worker Inhalation (vol+part)
Option: Vegetable Ingestion
Apply UK (CLEA) SGV as soil concentration limit
Combined Exposure
Volatilization and Particulates
Exposure Pathway Identification
Main Print Sheet Help
?
?
?
Exposure Flowchart
Set Units
?
Veg OptionsVeg Options
Bldg OptionsBldg Options
Exposure Factors & Target Risks
Enter CriteriaEnter Criteria
RBCA Tool Kit for Chemical Releases, Version 2.6
Site Name: MP Grocery Job ID: 75207123 Commands and Options
Location: Lansing, NC Date: 15-Mar-22
Compl. By: Terracon Consultants, Inc.
Selected COCs Representative COC Concentration
Groundwater Source Zone Soil Source Zone Mole Fraction
o n in Source
n o Material
(mg/L)note (mg/kg)note (-)
Benzene 6.1E-3
Toluene 1.0E-1 Concentrations of COC in MW-2
Ethyl benzene 5.1E-1 during the 8/25/2011 sampling event
Xylenes (mixed isomers)1.6E+0
Naphthalene 8.3E-2
Trimethylbenzene, 1,2,4-5.2E-1
Apply
Raoul
t's
Source Media Constituents of Concern (COCs)
COC Sort List:
Top
Bottom
MoveUAdd/Ins
Delete MoveD
Main Screen Print Help
?
??
View Chemical Parameters
Enter Site DataEnter Site Data Enter Site DataEnter Site Data
RBCA Tool Kit for Chemical Releases, Version 2.6
##Site Name: MP Grocery Job ID: 75207123
Location: Lansing, NC Date: 15-Mar-22
1. Vertical Transport, Surface Soil Column Compl. By: Terracon Consultants, Inc.
Outdoor Air Volatilization Factors 3. Groundwater Dilution Attenuation Factor
Surface soil volatilization model only
Combination surface soil/Johnson & Ettinger models
Thickness of surface soil zone 3.28 (ft)Calculate DAF using Domenico Model
User-specified VF from other model Domenico equation with dispersion only (no biodegradation)
Indoor Air Volatilization Factors Domenico equation first-order decay
Johnson & Ettinger model for soil and groundwater volatilization Modified Domenico equation using
Johnson & Ettinger for soil, Mass Flux model for groundwater electron acceptor superposition
User-specified VF from other model Biodegradation Capacity NC (mg/L)
Soil-to-Groundwater Leaching Factor — or —
ASTM Model User-Specified DAF Values
Apply Soil Attenuation Model (SAM)DAF values from other model or site data
Allow first-order biodecay
User-specified LF from other model 4. Chemical Decay and Source Depletion
Modeling Options
Disable Mass Balance Limit
Apply Dual Equilibrium Desorption Model
2. Lateral Air Dispersion Factor 5. Commands and Options
3-D Gaussian dispersion model Off-site 1 Off-site 2
User-Specified ADF 1.00E+0 1.00E+0 (-)
Transport Modeling Options
C
Enter VF ValuesEnter VF Values
Print SheetMain Screen Help
?
?
ASTM ModelASTM Model
?
Enter Source MassEnter Source Mass
Enter Decay RatesEnter Decay Rates
Enter DAF ValuesEnter DAF Values
Enter Site DataEnter Site Data
Enter Decay Rates
Enter Decay RatesEnter Decay Rates
Enter LF ValuesEnter LF Values
Enter VF ValuesEnter VF Values
?
?
?
?
C
RBCA Tool Kit for Chemical Releases, Version 2.6
Site Name: MP Grocery Job ID: 75207123 Commands and Options
Location: Lansing, NC Date: 15-Mar-22
Compl. By: Terracon Consultants, Inc.
Saturated Zone Unsaturated Zone
First-Order Decay First-Order Decay
Constituent Half-Life Coefficient Half-Life Coefficient
(day)(1/day)(day)(1/day)
Benzene 7.2E+2 9.6E-4 7.2E+2 9.6E-4
Toluene 2.8E+1 2.5E-2 2.8E+1 2.5E-2
Ethyl benzene 2.3E+2 3.0E-3 2.3E+2 3.0E-3
Xylenes (mixed isomers)3.6E+2 1.9E-3 3.6E+2 1.9E-3
Naphthalene 2.6E+2 2.7E-3 2.6E+2 2.7E-3
Trimethylbenzene, 1,2,4-5.6E+1 1.2E-2 5.6E+1 1.2E-2
Constituent Decay Rates
Return Print Sheet
HelpPaste Default Values
RBCA Tool Kit for Chemical Releases, Version 2.6
#Site Name: MP Grocery Job ID: 75207123
Location: Lansing, NC Date: 15-Mar-22
1. Water-Bearing Unit Compl. By: Terracon Consultants, Inc.
Hydrogeology 3. Groundwater Dispersion
Groundwater Darcy velocity 4.2E+0 (ft/yr)Model:GW Ingestion
Groundwater seepage velocity 1.3E+1 (ft/yr)Off-site 1 Off-site 2 Off-site 1 Off-site 2
or Distance to GW receptors 80 200 0 0 (ft)
Hydraulic conductivity 9.9E+1 (ft/yr)
Hydraulic gradient 0.0423 (-)Longitudinal dispersivity 8 20 0 0 (ft)
Effective porosity 0.32 (-)Transverse dispersivity 2.64 6.6 0 0 (ft)
Sorption Vertical dispersivity 0.4 1 0 0 (ft)
Fraction organic carbon--saturated zone 0.001 (-) 4. Groundwater Discharge to Surface Water
Groundwater pH 6.6 (-)
2. Groundwater Source Zone Off-site 2
Groundwater plume width at source 80 (ft)Distance to GW/SW disharge point NA (ft)
Plume (mixing zone) thickness at source 40.2290841 (ft)
Plume width at GW/SW discharge (ft)
Saturated thickness 47 (ft)Plume thickness at GW/SW discharge (ft)
Length of source zone 147.637795 (ft)
Surface water flowrate at GW/SW discharge (ft^3/s)
5. Commands and Options
GW to Indoor Air
Site-Specific Groundwater Parameters
or
or
?
?
?
Main Screen Use/Set Default
ValuesSet Units
Print Sheet
Help
?
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 5 of 6
Constiuent:Benzene
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)11.0 FALSE 0 Off-site1 Off-site2
(for given time)0.001 ##Residential None
Distance (ft)0 8 16 24 32 40 48 56 64 72 80 ###80 NA
t = 11.0 yr 6.1E-3 4.6E-3 3.5E-3 2.7E-3 2.1E-3 1.7E-3 1.3E-3 1.1E-3 8.4E-4 6.7E-4 5.3E-4 ###5.3E-4 NA
Steady-state 6.1E-3 4.6E-3 3.5E-3 2.7E-3 2.1E-3 1.7E-3 1.3E-3 1.1E-3 8.5E-4 6.8E-4 5.5E-4 #####5.5E-4 NA
POE Concentration Limit (mg/L)4.5E-2 NA
t = 11.0 yr
Concentration vs. Time Distance (ft)80 0.0001
(for given distance from source)0 0 6.0E-4
Time (yr)0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11 11 Time to Reach
x = 80 ft 0.0E+0 2.1E-10 2.2E-6 3.9E-5 1.4E-4 2.6E-4 3.6E-4 4.4E-4 4.9E-4 5.1E-4 5.3E-4 #####Conc. Limit (yr)
Off-site1 (80 ft)0.0E+0 2.1E-10 2.2E-6 3.9E-5 1.4E-4 2.6E-4 3.6E-4 4.4E-4 4.9E-4 5.1E-4 5.3E-4 Off-site1 NA
Off-site2 (200 ft)0.0E+0 0.0E+0 7.2E-13 1.5E-9 6.0E-8 4.8E-7 1.8E-6 4.1E-6 7.2E-6 1.1E-5 1.4E-5 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+0
1.0E-3
2.0E-3
3.0E-3
4.0E-3
5.0E-3
6.0E-3
7.0E-3
0 10 20 30 40 50 60 70 80Conc. (mg/L)Distance
Steady-state
t = 11.0 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
1.0E-4
2.0E-4
3.0E-4
4.0E-4
5.0E-4
6.0E-4
0 2 4 6 8 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (80 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 1 of 6
Constiuent:Toluene
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)11.0 TRUE 0 Off-site1 Off-site2
(for given time)0.1 ##Residential None
Distance (ft)0 8 16 24 32 40 48 56 64 72 80 ###80 NA
t = 11.0 yr 1.0E-1 2.4E-4 5.6E-6 2.9E-7 2.3E-8 2.4E-9 3.0E-10 4.6E-11 7.7E-12 1.4E-12 2.9E-13 ###2.9E-13 NA
Steady-state 1.0E-1 2.4E-4 5.6E-6 2.9E-7 2.3E-8 2.4E-9 3.0E-10 4.6E-11 7.7E-12 1.4E-12 2.9E-13 #####2.9E-13 NA
POE Concentration Limit (mg/L)1.3E+0 NA
t = 11.0 yr
Concentration vs. Time Distance (ft)80 1E-13
(for given distance from source)0 0 3.0E-13
Time (yr)0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11 11 Time to Reach
x = 80 ft 0.0E+0 2.0E-15 2.7E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 #####Conc. Limit (yr)
Off-site1 (80 ft)0.0E+0 2.0E-15 2.7E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 2.9E-13 Off-site1 NA
Off-site2 (200 ft)0.0E+0 8.0E-32 2.0E-22 2.5E-21 2.7E-21 2.7E-21 2.7E-21 2.7E-21 2.7E-21 2.7E-21 2.7E-21 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+01.0E-2
2.0E-2
3.0E-2
4.0E-2
5.0E-2
6.0E-2
7.0E-2
8.0E-29.0E-2
1.0E-1
0 10 20 30 40 50 60 70 80Conc. (mg/L)Distance
Steady-state
t = 11.0 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
5.0E-14
1.0E-13
1.5E-13
2.0E-13
2.5E-13
3.0E-13
0 2 4 6 8 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (80 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 2 of 6
Constiuent:Ethyl benzene
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)11.0 FALSE 1 Off-site1 Off-site2
(for given time)0.1 ##Residential None
Distance (ft)0 8 16 24 32 40 48 56 64 72 80 ###80 NA
t = 11.0 yr 5.1E-1 1.4E-1 5.1E-2 2.0E-2 8.9E-3 4.2E-3 2.1E-3 1.1E-3 5.7E-4 3.1E-4 1.7E-4 ###1.7E-4 NA
Steady-state 5.1E-1 1.4E-1 5.1E-2 2.0E-2 8.9E-3 4.2E-3 2.1E-3 1.1E-3 5.7E-4 3.1E-4 1.8E-4 #####1.8E-4 NA
POE Concentration Limit (mg/L)1.6E+0 NA
t = 11.0 yr
Concentration vs. Time Distance (ft)80 0.0001
(for given distance from source)0 0 2.0E-4
Time (yr)0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11 11 Time to Reach
x = 80 ft 0.0E+0 2.7E-13 2.4E-7 1.2E-5 5.9E-5 1.1E-4 1.5E-4 1.7E-4 1.7E-4 1.7E-4 1.7E-4 #####Conc. Limit (yr)
Off-site1 (80 ft)0.0E+0 2.7E-13 2.4E-7 1.2E-5 5.9E-5 1.1E-4 1.5E-4 1.7E-4 1.7E-4 1.7E-4 1.7E-4 Off-site1 NA
Off-site2 (200 ft)0.0E+0 0.0E+0 3.1E-17 2.2E-12 3.6E-10 5.3E-9 2.3E-8 5.4E-8 8.7E-8 1.1E-7 1.3E-7 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+0
1.0E-1
2.0E-1
3.0E-1
4.0E-1
5.0E-1
6.0E-1
0 10 20 30 40 50 60 70 80Conc. (mg/L)Distance
Steady-state
t = 11.0 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
2.0E-54.0E-5
6.0E-5
8.0E-5
1.0E-4
1.2E-41.4E-4
1.6E-41.8E-4
2.0E-4
0 2 4 6 8 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (80 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 3 of 6
Constiuent:Xylenes (mixed isomers)
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)11.0 FALSE 2 Off-site1 Off-site2
(for given time)1 ##Residential None
Distance (ft)0 8 16 24 32 40 48 56 64 72 80 ###80 NA
t = 11.0 yr 1.6E+0 6.5E-1 3.0E-1 1.5E-1 7.8E-2 4.3E-2 2.5E-2 1.5E-2 8.8E-3 5.4E-3 3.3E-3 ###3.3E-3 NA
Steady-state 1.6E+0 6.5E-1 3.0E-1 1.5E-1 7.8E-2 4.3E-2 2.5E-2 1.5E-2 8.9E-3 5.5E-3 3.4E-3 #####3.4E-3 NA
POE Concentration Limit (mg/L)3.1E+0 NA
t = 11.0 yr
Concentration vs. Time Distance (ft)80 0.001
(for given distance from source)0 0 4.0E-3
Time (yr)0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11 11 Time to Reach
x = 80 ft 0.0E+0 8.4E-14 4.2E-7 4.9E-5 3.9E-4 1.1E-3 1.9E-3 2.6E-3 3.0E-3 3.2E-3 3.3E-3 #####Conc. Limit (yr)
Off-site1 (80 ft)0.0E+0 8.4E-14 4.2E-7 4.9E-5 3.9E-4 1.1E-3 1.9E-3 2.6E-3 3.0E-3 3.2E-3 3.3E-3 Off-site1 NA
Off-site2 (200 ft)0.0E+0 0.0E+0 7.6E-18 2.5E-12 1.0E-9 3.1E-8 2.4E-7 8.8E-7 2.1E-6 3.6E-6 5.1E-6 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+02.0E-1
4.0E-1
6.0E-1
8.0E-1
1.0E+0
1.2E+0
1.4E+0
1.6E+01.8E+0
2.0E+0
0 10 20 30 40 50 60 70 80Conc. (mg/L)Distance
Steady-state
t = 11.0 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
5.0E-4
1.0E-3
1.5E-3
2.0E-3
2.5E-3
3.0E-3
3.5E-3
4.0E-3
0 2 4 6 8 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (80 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 4 of 6
Constiuent:Trimethylbenzene, 1,2,4-
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)11.0 FALSE 1 Off-site1 Off-site2
(for given time)0.1 ##Residential None
Distance (ft)0 8 16 24 32 40 48 56 64 72 80 ###80 NA
t = 11.0 yr 5.2E-1 7.9E-5 5.0E-7 9.4E-9 3.2E-10 1.6E-11 1.1E-12 9.0E-14 8.7E-15 9.6E-16 1.2E-16 ###1.2E-16 NA
Steady-state 5.2E-1 7.9E-5 5.0E-7 9.4E-9 3.2E-10 1.6E-11 1.1E-12 9.0E-14 8.7E-15 9.6E-16 1.2E-16 #####1.2E-16 NA
POE Concentration Limit (mg/L)7.8E-1 NA
t = 11.0 yr
Concentration vs. Time Distance (ft)80 1E-16
(for given distance from source)0 0 2.0E-16
Time (yr)0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11 11 Time to Reach
x = 80 ft 0.0E+0 0.0E+0 2.2E-22 3.1E-18 5.5E-17 1.1E-16 1.2E-16 1.2E-16 1.2E-16 1.2E-16 1.2E-16 #####Conc. Limit (yr)
Off-site1 (80 ft)0.0E+0 0.0E+0 2.2E-22 3.1E-18 5.5E-17 1.1E-16 1.2E-16 1.2E-16 1.2E-16 1.2E-16 1.2E-16 Off-site1 NA
Off-site2 (200 ft)0.0E+0 0.0E+0 0.0E+0 6.5E-37 2.3E-31 8.4E-29 1.2E-27 3.1E-27 3.9E-27 4.1E-27 4.1E-27 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+0
1.0E-1
2.0E-1
3.0E-1
4.0E-1
5.0E-1
6.0E-1
0 10 20 30 40 50 60 70 80Conc. (mg/L)Distance
Steady-state
t = 11.0 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
2.0E-174.0E-17
6.0E-17
8.0E-17
1.0E-16
1.2E-161.4E-16
1.6E-161.8E-16
2.0E-16
0 2 4 6 8 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (80 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 6 of 6
Constiuent:Naphthalene
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)11.0 FALSE 0 Off-site1 Off-site2
(for given time)0.01 ##Residential None
Distance (ft)0 8 16 24 32 40 48 56 64 72 80 ###80 NA
t = 11.0 yr 8.3E-2 1.6E-3 1.1E-4 1.2E-5 1.7E-6 3.1E-7 6.0E-8 1.3E-8 2.8E-9 6.4E-10 1.5E-10 ###1.5E-10 NA
Steady-state 8.3E-2 1.6E-3 1.1E-4 1.2E-5 1.8E-6 3.4E-7 7.4E-8 1.8E-8 4.7E-9 1.3E-9 4.0E-10 #####4.0E-10 NA
POE Concentration Limit (mg/L)3.1E-1 NA
t = 11.0 yr
Concentration vs. Time Distance (ft)80 1E-10
(for given distance from source)0 0 2.0E-10
Time (yr)0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11 11 Time to Reach
x = 80 ft 0.0E+0 0.0E+0 0.0E+0 5.4E-21 1.0E-16 2.7E-14 8.2E-13 7.3E-12 3.1E-11 8.0E-11 1.5E-10 #####Conc. Limit (yr)
Off-site1 (80 ft)0.0E+0 0.0E+0 0.0E+0 5.4E-21 1.0E-16 2.7E-14 8.2E-13 7.3E-12 3.1E-11 8.0E-11 1.5E-10 Off-site1 NA
Off-site2 (200 ft)0.0E+0 0.0E+0 0.0E+0 0.0E+0 0.0E+0 1.5E-31 2.7E-27 2.2E-24 2.7E-22 9.4E-21 1.3E-19 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+0
1.0E-2
2.0E-2
3.0E-2
4.0E-2
5.0E-2
6.0E-2
7.0E-2
8.0E-2
9.0E-2
0 10 20 30 40 50 60 70 80Conc. (mg/L)Distance
Steady-state
t = 11.0 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
2.0E-114.0E-11
6.0E-11
8.0E-11
1.0E-10
1.2E-101.4E-10
1.6E-101.8E-10
2.0E-10
0 2 4 6 8 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (80 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
Site Name: MP Grocery Job ID: 75207123 Commands and Options
Location: Lansing, NC Date: 15-Mar-22
Compl. By: Terracon Consultants, Inc.
Selected COCs Representative COC Concentration
Groundwater Source Zone Soil Source Zone Mole Fraction
o n in Source
n o Material
(mg/L)note (mg/kg)note (-)
Toluene 6.5E-1 Concentrations of COC in MW-2
Ethyl benzene 1.3E+0 during the 3/3/2022 sampling event
Xylenes (mixed isomers)4.3E+0
Trimethylbenzene, 1,2,4-6.5E-1
Apply
Raoult's
Law
Source Media Constituents of Concern (COCs)
COC Select:Sort List:
Top
Bottom
MoveUpAdd/Insert
Delete MoveDown
Main Screen Print Sheet Help
?
??
View Chemical Parameters
Enter Site DataEnter Site Data Enter Site DataEnter Site Data
RBCA Tool Kit for Chemical Releases, Version 2.6
#Site Name: MP Grocery Job ID: 75207123
Location: Lansing, NC Date: 15-Mar-22
1. Water-Bearing Unit Compl. By: Terracon Consultants, Inc.
Hydrogeology 3. Groundwater Dispersion
Groundwater Darcy velocity 4.2E+0 (ft/yr)Model:GW Ingestion
Groundwater seepage velocity 1.3E+1 (ft/yr)Off-site 1 Off-site 2 Off-site 1 Off-site 2
or Distance to GW receptors 60 200 0 0 (ft)
Hydraulic conductivity 9.9E+1 (ft/yr)
Hydraulic gradient 0.0423 (-)Longitudinal dispersivity 6 20 0 0 (ft)
Effective porosity 0.32 (-)Transverse dispersivity 1.98 6.6 0 0 (ft)
Sorption Vertical dispersivity 0.3 1 0 0 (ft)
Fraction organic carbon--saturated zone 0.001 (-) 4. Groundwater Discharge to Surface Water
Groundwater pH 6.6 (-)
2. Groundwater Source Zone Off-site 2
Groundwater plume width at source 80 (ft)Distance to GW/SW disharge point NA (ft)
Plume (mixing zone) thickness at source 40.2290841 (ft)
Plume width at GW/SW discharge (ft)
Saturated thickness 47 (ft)Plume thickness at GW/SW discharge (ft)
Length of source zone 147.637795 (ft)
Surface water flowrate at GW/SW discharge (ft^3/s)
5. Commands and Options
GW to Indoor Air
Site-Specific Groundwater Parameters
or
or
?
?
?
Main Screen Use/Set Default
ValuesSet Units
Print Sheet
Help
?
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 1 of 4
Constiuent:Toluene
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)20.0 FALSE 1 Off-site1 Off-site2
(for given time)0.1 ##Residential Residential
Distance (ft)0 20 40 60 80 100 120 140 160 180 200 ###60 200
t = 20 yr 6.5E-1 7.7E-6 1.5E-8 1.2E-10 1.9E-12 4.7E-14 1.6E-15 7.0E-17 3.8E-18 2.4E-19 1.8E-20 ###1.2E-10 1.8E-20
Steady-state 6.5E-1 7.7E-6 1.5E-8 1.2E-10 1.9E-12 4.7E-14 1.6E-15 7.0E-17 3.8E-18 2.4E-19 1.8E-20 #####1.2E-10 1.8E-20
POE Concentration Limit (mg/L)1.3E+0 1.3E+0
t = 20 yr
Concentration vs. Time Distance (ft)80 1E-10
(for given distance from source)0 0 2.0E-10
Time (yr)0 1 2 3 4 5 6 7 8 9 10 10 Time to Reach
x = 80 ft 0.0E+0 2.5E-15 1.6E-12 1.9E-12 1.9E-12 1.9E-12 1.9E-12 1.9E-12 1.9E-12 1.9E-12 1.9E-12 #####Conc. Limit (yr)
Off-site1 (60 ft)0.0E+0 2.7E-12 1.1E-10 1.2E-10 1.2E-10 1.2E-10 1.2E-10 1.2E-10 1.2E-10 1.2E-10 1.2E-10 Off-site1 NA
Off-site2 (200 ft)0.0E+0 2.7E-33 2.9E-22 1.3E-20 1.7E-20 1.8E-20 1.8E-20 1.8E-20 1.8E-20 1.8E-20 1.8E-20 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+0
1.0E-1
2.0E-1
3.0E-1
4.0E-1
5.0E-1
6.0E-1
7.0E-1
0 20 40 60 80 100 120 140 160 180 200Conc. (mg/L)Distance
Steady-state
t = 20 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
2.0E-114.0E-11
6.0E-11
8.0E-11
1.0E-10
1.2E-101.4E-10
1.6E-101.8E-10
2.0E-10
0 1 2 3 4 5 6 7 8 9 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (60 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 2 of 4
Constiuent:Ethyl benzene
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)20.0 FALSE 2 Off-site1 Off-site2
(for given time)1 ##Residential Residential
Distance (ft)0 20 40 60 80 100 120 140 160 180 200 ###60 200
t = 20 yr 1.3E+0 7.8E-2 1.0E-2 1.9E-3 4.3E-4 1.1E-4 3.0E-5 8.9E-6 2.8E-6 9.6E-7 3.4E-7 ###1.9E-3 3.4E-7
Steady-state 1.3E+0 7.8E-2 1.0E-2 1.9E-3 4.3E-4 1.1E-4 3.0E-5 8.9E-6 2.8E-6 9.6E-7 3.4E-7 #####1.9E-3 3.4E-7
POE Concentration Limit (mg/L)1.6E+0 1.6E+0
t = 20 yr
Concentration vs. Time Distance (ft)80 0.001
(for given distance from source)0 0 2.0E-3
Time (yr)0 2 4 6 8 10 12 14 16 18 20 20 Time to Reach
x = 80 ft 0.0E+0 1.6E-7 9.5E-5 3.2E-4 4.1E-4 4.3E-4 4.3E-4 4.3E-4 4.3E-4 4.3E-4 4.3E-4 #####Conc. Limit (yr)
Off-site1 (60 ft)0.0E+0 1.0E-5 8.5E-4 1.7E-3 1.9E-3 1.9E-3 1.9E-3 1.9E-3 1.9E-3 1.9E-3 1.9E-3 Off-site1 NA
Off-site2 (200 ft)0.0E+0 2.4E-18 2.1E-10 2.8E-8 1.6E-7 2.8E-7 3.3E-7 3.4E-7 3.4E-7 3.4E-7 3.4E-7 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+02.0E-1
4.0E-1
6.0E-1
8.0E-1
1.0E+0
1.2E+0
1.4E+0
1.6E+01.8E+0
2.0E+0
0 20 40 60 80 100 120 140 160 180 200Conc. (mg/L)Distance
Steady-state
t = 20 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
2.0E-44.0E-4
6.0E-4
8.0E-4
1.0E-3
1.2E-31.4E-3
1.6E-31.8E-3
2.0E-3
0 2 4 6 8 10 12 14 16 18 20Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (60 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 3 of 4
Constiuent:Xylenes (mixed isomers)
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)20.0 FALSE 5 Off-site1 Off-site2
(for given time)1 ##Residential Residential
Distance (ft)0 20 40 60 80 100 120 140 160 180 200 ###60 200
t = 20 yr 4.3E+0 5.5E-1 1.2E-1 3.0E-2 9.1E-3 2.9E-3 1.0E-3 3.7E-4 1.4E-4 5.8E-5 2.4E-5 ###3.0E-2 2.4E-5
Steady-state 4.3E+0 5.5E-1 1.2E-1 3.0E-2 9.1E-3 2.9E-3 1.0E-3 3.7E-4 1.4E-4 5.8E-5 2.4E-5 #####3.0E-2 2.4E-5
POE Concentration Limit (mg/L)3.1E+0 3.1E+0
t = 20 yr
Concentration vs. Time Distance (ft)80 0.01
(for given distance from source)0 0 4.0E-2
Time (yr)0 1.9 3.8 5.7 7.6 9.5 11.4 13.3 15.2 17.1 19 19 Time to Reach
x = 80 ft 0.0E+0 1.1E-7 4.1E-4 3.4E-3 6.7E-3 8.3E-3 8.9E-3 9.0E-3 9.0E-3 9.1E-3 9.1E-3 #####Conc. Limit (yr)
Off-site1 (60 ft)0.0E+0 1.2E-5 4.6E-3 1.8E-2 2.7E-2 2.9E-2 3.0E-2 3.0E-2 3.0E-2 3.0E-2 3.0E-2 Off-site1 NA
Off-site2 (200 ft)0.0E+0 4.4E-20 1.7E-10 1.3E-7 2.1E-6 8.0E-6 1.5E-5 2.0E-5 2.3E-5 2.4E-5 2.4E-5 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+05.0E-1
1.0E+0
1.5E+0
2.0E+0
2.5E+0
3.0E+0
3.5E+0
4.0E+04.5E+0
5.0E+0
0 20 40 60 80 100 120 140 160 180 200Conc. (mg/L)Distance
Steady-state
t = 20 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
5.0E-3
1.0E-2
1.5E-2
2.0E-2
2.5E-2
3.0E-2
3.5E-2
4.0E-2
0 2 4 6 8 10 12 14 16 18Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (60 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT TIER 2 TRANSIENT DOMENICO ANALYSIS
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22 4 of 4
Constiuent:Trimethylbenzene, 1,2,4-
Source Medium:Affected Groundwater
Biodegredation:1st Order
Concentration vs. Distance from Source Time (yr)20.0 FALSE 1 Off-site1 Off-site2
(for given time)0.1 ##Residential Residential
Distance (ft)0 20 40 60 80 100 120 140 160 180 200 ###60 200
t = 20 yr 6.5E-1 7.8E-8 2.0E-11 3.4E-14 1.5E-16 1.2E-18 1.4E-20 2.4E-22 5.5E-24 1.5E-25 5.1E-27 ###3.4E-14 5.1E-27
Steady-state 6.5E-1 7.8E-8 2.0E-11 3.4E-14 1.5E-16 1.2E-18 1.4E-20 2.4E-22 5.5E-24 1.5E-25 5.1E-27 #####3.4E-14 5.1E-27
POE Concentration Limit (mg/L)7.8E-1 7.8E-1
t = 20 yr
Concentration vs. Time Distance (ft)80 1E-14
(for given distance from source)0 0 4.0E-14
Time (yr)0 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11 11 Time to Reach
x = 80 ft 0.0E+0 0.0E+0 2.8E-22 3.9E-18 6.8E-17 1.3E-16 1.5E-16 1.5E-16 1.5E-16 1.5E-16 1.5E-16 #####Conc. Limit (yr)
Off-site1 (60 ft)0.0E+0 2.5E-29 1.2E-17 6.0E-15 2.7E-14 3.4E-14 3.4E-14 3.4E-14 3.4E-14 3.4E-14 3.4E-14 Off-site1 NA
Off-site2 (200 ft)0.0E+0 0.0E+0 0.0E+0 8.1E-37 2.8E-31 1.1E-28 1.5E-27 3.8E-27 4.9E-27 5.1E-27 5.1E-27 Off-site2 NA
x = 80 ftConc.(mg/L)Conc.(mg/L)0.0E+0
1.0E-1
2.0E-1
3.0E-1
4.0E-1
5.0E-1
6.0E-1
7.0E-1
0 20 40 60 80 100 120 140 160 180 200Conc. (mg/L)Distance
Steady-state
t = 20 yr
Off-site1 Conc.Limit
Off-site2 Conc.Limit
0.0E+0
5.0E-15
1.0E-14
1.5E-14
2.0E-14
2.5E-14
3.0E-14
3.5E-14
4.0E-14
0 2 4 6 8 10Conc. (mg/L)Time (yr)
x = 80 ft
Off-site1 (60 ft)
Off-site2 (200 ft)
Off-site1 Conc.Limit
Off-site2 Conc.Limit
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT Tier 2 Domenico Groundwater Modeling Summary
Site Name: MP Grocery Site Location: Lansing, NC Completed By: Terracon Consultants, Inc.Date Completed: 15-Mar-22 1 OF 2
DOMENICO GROUNDWATER MODELING SUMMARY
OFF-SITE GROUNDWATER EXPOSURE PATHWAYS o (CHECKED IF PATHWAY IS ACTIVE)
SOILS LEACHING TO GROUNDWATER
1) Source Medium 2) Steady-state Exposure Concentration 3) POE Concentration Limit 4) Time to Reach POE Conc. Limit
Groundwater: POE Conc. (mg/L)Groundwater: POE Conc. (mg/L)Conc. limit reached? ("n" if yes) ; Time (yr)
Soil Conc.Off-site 1
(60 ft)
Off-site 2
(200 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)Constituents of Concern (mg/kg)None None None None None None
Toluene NA NA
Ethyl benzene NA NA
Xylenes (mixed isomers)NA NA
Trimethylbenzene, 1,2,4-NA NA
NOTE: POE = Point of exposure
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT Tier 2 Domenico Groundwater Modeling Summary
Site Name: MP Grocery Site Location: Lansing, NC Completed By: Terracon Consultants, Inc.Date Completed: 15-Mar-22 2 OF 2
DOMENICO GROUNDWATER MODELING SUMMARY
OFF-SITE GROUNDWATER EXPOSURE PATHWAYS n (CHECKED IF PATHWAY IS ACTIVE)
GROUNDWATER:
INGESTION 1) Source Medium 2) Steady-state Exposure Concentration 3) POE Concentration Limit 4) Time to Reach POE Conc. Limit
Groundwater: POE Conc. (mg/L)Groundwater: POE Conc. (mg/L)Conc reaches limit? ("n" If yes) ; Time (yr)
Groundwater Off-site 1
(60 ft)
Off-site 2
(200 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)Constituents of Concern Conc. (mg/L)Residential Residential Residential Residential Residential Residential
Toluene 6.5E-1 1.2E-10 1.8E-20 1.3E+0 1.3E+0 o NA o NA
Ethyl benzene 1.3E+0 1.9E-3 3.4E-7 1.6E+0 1.6E+0 o NA o NA
Xylenes (mixed isomers)4.3E+0 3.0E-2 2.4E-5 3.1E+0 3.1E+0 o NA o NA
Trimethylbenzene, 1,2,4-6.5E-1 3.4E-14 5.1E-27 7.8E-1 7.8E-1 o NA o NA
NOTE: POE = Point of exposure
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT
1 OF 7
TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION
GROUNDWATER EXPOSURE PATHWAYS o (Checked if Pathway is Complete)
SOILS : LEACHING TO
GROUNDWATER INGESTION 1) Source Medium 2) NAF Value (L/kg)3) Exposure Medium
Receptor Groundwater: POE Conc. (mg/L) (1)/(2)
Soil Conc.
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Constituents of Concern (mg/kg)None Residential Residential None Residential Residential
Toluene
Ethyl benzene
Xylenes (mixed isomers)
Trimethylbenzene, 1,2,4-
* = Chemical with user-specified data
NOTE: NAF = Natural attenuation factor POE = Point of exposure
Site Name: MP Grocery Date Completed: 15-Mar-22
Site Location: Lansing, NC Job ID: 75207123
Completed By: Terracon Consultants, Inc.
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT
2 OF 7
TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION
GROUNDWATER EXPOSURE PATHWAYS
SOILS : LEACHING TO
GROUNDWATER INGESTION (cont'd)4) Exposure Multiplier 5) Average Daily Intake Rate
(IRxEFxED)/(BWxAT) (L/kg-day)(mg/kg/day) (3) x (4)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Constituents of Concern None Residential Residential None Residential Residential
Toluene
Ethyl benzene
Xylenes (mixed isomers)
Trimethylbenzene, 1,2,4-
* = Chemical with user-specified data
NOTE: AT = Averaging time (days)ED = Exposure duration (yr)IR = Ingestion rate (mg/day)
BW = Body weight (kg)EF = Exposure frequency (days/yr)
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT
3 OF 7
TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION
GROUNDWATER EXPOSURE PATHWAYS n (Checked if Pathway is Complete)
GROUNDWATER: INGESTION
1) Source Medium 2) NAF Value (unitless)3) Exposure Medium
Receptor Groundwater: POE Conc. (mg/L) (1)/(2)
Groundwater
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Constituents of Concern Conc. (mg/L)None Residential Residential None Residential Residential
Toluene 6.5E-1 5.4E+9 3.7E+19 1.2E-10 1.8E-20
Ethyl benzene 1.3E+0 6.5E+2 3.7E+6 1.9E-3 3.4E-7
Xylenes (mixed isomers)4.3E+0 1.4E+2 1.7E+5 3.0E-2 2.4E-5
Trimethylbenzene, 1,2,4-6.5E-1 1.9E+13 1.3E+26 3.4E-14 5.1E-27
NOTE: NAF = Natural attenuation factor POE = Point of exposure
Site Name: MP Grocery Date Completed: 15-Mar-22
Site Location: Lansing, NC Job ID: 75207123
Completed By: Terracon Consultants, Inc.
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT
4 OF 7
TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION
GROUNDWATER EXPOSURE PATHWAYS
GROUNDWATER INGESTION (cont'd)
4) Exposure Multiplier 5) Average Daily Intake Rate
(IRxEFxED)/(BWxAT) (L/kg/day)(mg/kg/day) (3) x (4)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Constituents of Concern None Residential Residential None Residential Residential
Toluene 6.4E-2 6.4E-2 7.7E-12 1.1E-21
Ethyl benzene 6.4E-2 6.4E-2 1.2E-4 2.2E-8
Xylenes (mixed isomers)6.4E-2 6.4E-2 1.9E-3 1.6E-6
Trimethylbenzene, 1,2,4-6.4E-2 6.4E-2 2.2E-15 3.3E-28
* = Chemical with user-specified data
NOTE: AT = Averaging time (days)ED = Exposure duration (yr)IR = Ingestion rate (mg/day)
BW = Body weight (kg)EF = Exposure frequency (days/yr)
Site Name: MP Grocery Completed By: Terracon Consultants, Inc.Job ID: 75207123
Site Location: Lansing, NC Date Completed: 15-Mar-22
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT
5 OF 7
TIER 2 EXPOSURE CONCENTRATION AND INTAKE CALCULATION
GROUNDWATER EXPOSURE PATHWAYS
MAXIMUM PATHWAY INTAKE (mg/kg/day)
(Maximum intake of active pathways
soil leaching & groundwater routes.)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Constituents of Concern None Residential Residential
Toluene 7.7E-12 1.1E-21
Ethyl benzene 1.2E-4 2.2E-8
Xylenes (mixed isomers)1.9E-3 1.6E-6
Trimethylbenzene, 1,2,4-2.2E-15 3.3E-28
* = Chemical with user-specified data
Site Name: MP Grocery Date Completed: 15-Mar-22
Site Location: Lansing, NC Job ID: 75207123
Completed By: Terracon Consultants, Inc.
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT
6 OF 7
TIER 2 PATHWAY RISK CALCULATION
GROUNDWATER EXPOSURE PATHWAYS n (Checked if Pathway is Complete)
CARCINOGENIC RISK
(1) Is (2) Maximum Carcinogenic (3) Oral (4) Individual COC
Carcinogenic Intake Rate (mg/kg/day)Slope Factor Risk (2) x (3)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
(mg/kg-day)^-1 On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Constituents of Concern None Residential Residential None Residential Residential
Toluene FALSE -
Ethyl benzene FALSE -
Xylenes (mixed isomers)FALSE -
Trimethylbenzene, 1,2,4-FALSE -
Total Pathway Carcinogenic Risk =
Site Name: MP Grocery Date Completed: 15-Mar-22
Site Location: Lansing, NC Job ID: 75207123
Completed By: Terracon Consultants, Inc.
RBCA Tool Kit for Chemical Releases, Version 2.6
RBCA SITE ASSESSMENT
7 OF 7
TIER 2 PATHWAY RISK CALCULATION
GROUNDWATER EXPOSURE PATHWAYS n (Checked if Pathway is Complete)
TOXIC EFFECTS
(5) Maximum Toxicant (6) Oral (7) Individual COCIntake Rate (mg/kg/day)Reference Hazard Quotient (5) / (6)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Dose
(mg/kg/day)
On-site
(0 ft)
Off-site 1
(60 ft)
Off-site 2
(200 ft)
Constituents of Concern None Residential Residential None Residential Residential
Toluene 7.7E-12 1.1E-21 8.0E-2 9.6E-11 1.4E-20
Ethyl benzene 1.2E-4 2.2E-8 1.0E-1 1.2E-3 2.2E-7
Xylenes (mixed isomers)1.9E-3 1.6E-6 2.0E-1 9.7E-3 7.8E-6
Trimethylbenzene, 1,2,4-2.2E-15 3.3E-28 5.0E-2 4.4E-14 6.6E-27
Total Pathway Hazard Index =1.1E-2 8.0E-6
Site Name: MP Grocery Date Completed: 15-Mar-22
Site Location: Lansing, NC Job ID: 75207123
Completed By: Terracon Consultants, Inc.