24050_Vernon Packaging_Subslab Soil Vapor Sampling Report July 2023_20230811

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August 11, 2023

Mr. Peter Doorn
Project Manager
Division of Waste Management – Brownfields Program
NC Department of Environmental Quality
1646 Mail Service Center
Raleigh, NC 27699-1646

P: [phone]
E: [e-mail]

Re: Sub-Slab Soil Vapor Sampling Report (July 2023)
Vernon Packaging
850 N. Trade Street
Winston-Salem, Forsyth County, North Carolina
NCBP #24050-20-034
Terracon Project No. 75217006

Dear Mr. Doorn:

On behalf of DPJ Residential, LLC, the Prospective Developer (PD), Terracon Consultants, Inc.
(Terracon) hereby submits this Sub-Slab Soil Vapor Sampling Report to evaluate volatile organic
compounds (VOCs) in sub-slab soil gas at the above-referenced site.

Objective
As described in Terracon’s Sub-Slab Soil Vapor Sampling Work Plan dated September 20, 2022,
nine permanent sub-slab soil vapor monitoring probes were to be installed at the site and sampled
following installation and re-sampled approximately 6 months following the initial sampling event.
Terracon’s Soil Vapor Sampling Report dated June 23, 2021, indicated that soil vapor samples
previously collected at the site contained the following concentrations of VOCs and/or SVOCs:

 Multiple VOCs were detected at concentrations below their respective North Carolina
Department of Environmental Quality (NCDEQ) Division of Waste Management
Residential Vapor Intrusion Screening Levels.
 Chloroform was detected in four of the eight sub-slab vapor samples at concentrations
ranging from 4.12 to 97.3 micrograms per cubic meter (µg/m3), as compared to the
Residential Vapor Intrusion Screening Level of 4.1 µg/m3.

Because the planned use of the site includes residential development and based on the emerging
use and interpretation of soil vapor survey data, the North Carolina Brownfields Program
Sub-Slab Soil Vapor Sampling Report (July 2023) Vernon
Vernon Packaging ■ Winston-Salem, NC
August 11, 2023 ■ Terracon Project No. 75217006

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subsequently requested that sub-slab soil vapor sampling activities be completed at the site, prior
to occupancy.

Standard of Care
Terracon’s services were performed in a manner consistent with generally accepted practices of
the profession undertaken in similar studies in the same geographical area during the same time.
Terracon makes no warranties, either expressed or implied, regarding the findings, conclusions,
or recommendations. Please note that Terracon does not warrant the work of laboratories,
regulatory agencies, or other third parties supplying information used in the preparation of the
report. These investigative services were performed in accordance with the workplan approved
by the Brownfields Program.

Project Background
The site currently consists of one parcel of land (Forsyth County PIN 6835-19-5678) located at
850 N. Trade Street in Winston-Salem, Forsyth County, North Carolina (Exhibit 1). The parcel
is under construction for the multi-unit residential structure shown on the plan layout (Exhibit 2).

Terracon’s Sub-Slab Soil Vapor Sampling Work Plan dated September 20, 2022 described the
procedures for installing sub-slab soil vapor sampling probes at the site. A total of nine sub-slab
soil vapor sampling probes were installed at the site in accordance with the Work Plan procedures
on October 13 and 14, 2022. The sub-slab vapor pins were installed on the bottom floors of the
two residential building structures that were actively under construction at the site at that time.
The soil vapor sampling probes were installed as follows:

 Advancement of nine (9) sub-slab soil vapor sampling points at the site. Vapor sampling
points were constructed by drilling 3/8-inch diameter holes through the existing slab
foundation with a hammer drill approximately 6 inches into the underlying soils/gravel.
 Vapor Pins were then installed into each drilled hole, secured per the Vapor Pin operating
procedure, and capped.

Terracon returned to the site on October 17, 2022, to collect the initial sub-slab soil vapor samples.
The results of the sub-slab soil sampling activities were presented in Terracon’s Sub-Slab Soil
Vapor Sampling Report dated February 20, 2023. Total VOCs detected by the photoionization
detector (PID) in the field were all between 0-0.5 parts per million on October 17, 2022. The report
noted that the sub-slab soil vapor samples contained a variety of VOC constituents that were
detected above laboratory method detection limits. The detected VOC concentrations in eight (8)
of the samples did not exceed the NCDEQ Residential Vapor Intrusion Screening Levels.
Trichloroethylene (TCE) was detected in the duplicate soil vapor point sample, SV-2D, at a
concentration of 38 micrograms per cubic meter (µg/m3), which is above the Residential Vapor
Intrusion Screening Level of 14 µg/m3 for TCE. TCE was not detected above method detection
limits in the record sample collected from soil vapor point SV-2. Chloroform was detected in the
Sub-Slab Soil Vapor Sampling Report (July 2023) Vernon
Vernon Packaging ■ Winston-Salem, NC
August 11, 2023 ■ Terracon Project No. 75217006

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vapor point sample, SV-5, at a concentration of 5.1 micrograms per cubic meter (µg/m3), which is
above the Residential Vapor Intrusion Screening Level of 4.1 µg/m3 for chloroform.

The soil vapor sample analytical results were input into the NCDEQ Risk Calculator, which was
set to default values. The Risk Calculator indicated that the carcinogenic and hazard index risk
values for the soil-gas to indoor air pathway were not exceeded for site residents or non-
residential workers.

Terracon again mobilized to the site on March 2, 2023 to collect sub-slab soil vapor samples. The
results of the sub-slab soil sampling activities were presented in Terracon’s Sub-Slab Soil Vapor
Sampling Report dated March 11, 2023. Total VOCs detected by the PID in the field were all
between 0.2-0.7 parts per million on March 2, 2023. The report noted that the sub-slab soil vapor
samples contained a contained a variety of VOC constituents detected above laboratory method
detection limits. The detected VOC concentrations in six (6) of the samples did not exceed the
NCDEQ Sub-Slab and Exterior Soil Gas Screening Levels (Screening Levels). TCE was not
detected in any samples collected during this event. In accordance with the NCDEQ Division of
Waste Management Vapor Intrusion Guidance document, because the screening levels were
exceeded in three (3) of the samples and because more than five (5) compounds with a non-
cancerous effect were present, the risk was further evaluated using the NCDEQ Risk Calculator.
The Risk Calculator indicated that the carcinogenic and hazard index risk values for the soil-gas
to indoor air pathway were not exceeded for site residents or non-residential workers.

Soil Gas Sampling
Terracon returned to the site for a third sampling event on July 5, 2023, to collect sub-slab soil
vapor samples from soil vapor probes SVP-2 and SVP-4. The samples were collected with
laboratory-provided flow controllers at a rate of 150 mL/minute into 1-liter Summa canisters, in
general accordance with the following protocols:

Shut-In Test: At each sub-slab soil vapor point, prior to connection of the sampling train to the
implant, a shut-in (dead-head) test was conducted to check for leaks in the above-ground
purge/sampling manifold. The sample canister and a sacrificial canister (which was not submitted
for laboratory analysis) were connected to the sampling train. The sampling train influent was
capped, the sampling canister remained closed, and a hand pump was used to create a negative
pressure environment. If there was an observable loss of vacuum, the fittings were adjusted until
the vacuum in the sample train did not noticeably dissipate.

Helium Tracer Test: For each soil vapor implant sample, following the shut-in test, the
purge/sampling train was connected to the soil vapor sampling implant and a helium tracer gas
leak test was conducted. The tracer gas serves as a QA/QC method to verify the integrity of the
seal of the sampling train to the sample implant. A helium detector was used to verify the
presence and concentration of tracer gas.
Sub-Slab Soil Vapor Sampling Report (July 2023) Vernon
Vernon Packaging ■ Winston-Salem, NC
August 11, 2023 ■ Terracon Project No. 75217006

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The protocol for using a tracer gas was to enclose the tubing and ground interface within a shroud
and enrich the shroud atmosphere to at least 10 percent helium. The purging device (i.e., syringe
or peristaltic pump) was situated inside the shroud and connected to the sampling train by Teflon®
lined tubing running through the shroud. A minimum of three volumes of the vapor implant annulus
and attached Teflon® lined tubing were purged. The helium concentrations in the shroud and the
purged soil vapor were documented after each purge volume.

Sample collection commenced after the tracer testing indicated helium concentrations in the vapor
implant were less than or equal to 10 percent of the helium concentration in the shroud, indicating
a sufficiently sealed Vapor Pin implant annulus.

Sample Collection
After completion of the helium tracer test, the valve of the purge device was closed, and the
sample canister valve was opened to collect soil vapor for laboratory analysis. Each sample was
collected in a laboratory-supplied, individually-certified 1.0-liter Summa canister connected to
sample tubing using Swagelok® fittings at the Vapor Pin implant. Each sample canister was filled
using a dedicated laboratory-provided flow controller and set to a sample rate of less than or equal
to 200 milliliters per minute.

An in-line vacuum gauge was connected to the sample flow controller to verify initial vacuum
levels within the canister and as an indicator that final equalization had been reached (i.e.,
sampling was complete). The sample canister valve was closed when the gauge measured less
than 7 inches of mercury (Hg) vacuum (i.e., sampling was complete). The final vacuum was not
allowed to reach 0 inches Hg vacuum.

Two samples were collected from soil vapor sampling points SV-2 through SV-4. A calibrated
PID was also used to collect total VOC concentrations just after each summa canister sample
was collected.

Sample Analyses
The two samples were labeled, packaged, and shipped along with a chain-of-custody form to
Eurofins in Folsom, CA, for analysis of VOCs using U.S. Environmental Protection Agency (EPA)
Method TO-15.

Analytical Results
The July 2023 sub-slab soil vapor samples contained a variety of VOC constituents detected
above laboratory method detection limits. None of the detected VOC concentrations in the two
samples exceeded the NCDEQ Sub-Slab and Exterior Soil Gas Screening Levels (Screening
Levels). TCE was not detected in any samples collected during this event. In accordance with the
NCDEQ Division of Waste Management Vapor Intrusion Guidance document, because more than
five (5) compounds with a non-cancerous effect were present, the risk was further evaluated using
the NCDEQ Risk Calculator.
Sub-Slab Soil Vapor Sampling Report (July 2023) Vernon
Vernon Packaging ■ Winston-Salem, NC
August 11, 2023 ■ Terracon Project No. 75217006

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Total VOCs detected by the PID in the field were all 0.0 parts per million on July 5, 2023. The
sub-slab soil vapor sample analytical results from the soil vapor probes SV-2 and SV-4 in October
2022, March 2023, and July 2023 sampling events are presented on Table 1. A summary of the
analytical results for each record sample location that exceeded detection levels is shown on
Exhibit 3. The laboratory analytical report is included in Appendix A.

Risk Calculator
The highest soil vapor sample analytical results for the July 2023 sampling event were entered
into the NCDEQ Risk Calculator, which was set to default values. The Risk Calculator’s results
indicated that the carcinogenic and hazard index risk values for the soil-gas to indoor air pathway
were not exceeded for site residents or non-residential workers. Copies of selected input and
output sheets associated with the Risk Calculator are presented in Appendix B.

Terracon appreciates the opportunity to present this report to the NC Brownfields Program.
Terracon recommends discontinuing soil vapor sampling at this time.

Terracon is licensed to practice geology in North Carolina. The certification number of the
corporation is F-0869. Should you have any questions or require additional information, please
do not hesitate to contact us at [phone].

Sincerely,
Terracon Consultants, Inc.

Laura Elliott, P.G. Edmund Woloszyn Jr., R.E.M.
Group Manager Department Manager II
NC License No. 2271 Environmental Services

Attachments:
Exhibit 1 – Topographic Map
Exhibit 2 – Site Plan with Sampling Locations
Exhibit 3 – Soil Vapor Analytical Map (July 2023)
Table 1 – Soil Gas Analytical Results Summary
Table 2 – Historical Soil Gas Analytical Results Summary
Appendix A – Laboratory Analytical Results and Chain of Custody
Appendix B – NCDEQ Risk Calculator Results

Cc: Mr. Porter Jones, DPJ Residential, LLC

EXHIBITS

TOPOGRAPHIC MAP
Vernon Packaging
848, 850 and 860 N. Trade Street
Winston-Salem, NC
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: RURAL HALL, NC (1/1/1994), WALKERTOWN, NC (1/1/1997), WINSTON-SALEM WEST, NC (1/1/1997) and WINSTON-SALEM EAST, NC (1/1/1997).
7327 -G W Friendly Avenue
Greensboro, NC
75217006
Project Manager:
Drawn by:
Checked by:
Approved by:
MIM
EW
EW
1”=2,000’
Vernon Pkg
Feb 2021
2020
Project No.
Scale:
File Name:
Date: 1
Exhibit MIM
APPROXIMATE
SITE BOUNDARY
>
>
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Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS,USDA, USGS, AeroGRID, IGN, and the GIS User Community
0 10050 Feet
75217006
Service Layer Credits: NC Statewide Orthoimagery, Site Boundaryapproximated from Forsyth County GIS and NCDEQ BrownfieldsProgram Site Plan.
Legend
>Soil Vapor Sampling Point
Approx. Building Outline
Approximate Parcel Boundary
Approximate Site BoundaryOAK STREETWEST TENTH STREET
Site Map
Vernon Packaging
848, 850, and 860 N. Trade StreetWinston-Salem, North CarolinaNORTH TRADE STREETSV-1
2
EXHIBITNO.Project No.:
Scale: 1" = 100'
File Name:
Date:January 2023
Vernon Pkg.
Project Manager.: MIM
Drawn by:
Reviewed by:
Approved by:EW
AAF
EW
SV-2 SV-3 SV-4
SV-6SV-5
SV-7
SV-8
SV-9
>
>
>>
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>
Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community
0 10050 Feet
75217006
Service Layer Credits: NC Statewide Orthoimagery, Site Boundaryapproximated from Forsyth County GIS and NCDEQ BrownfieldsProgram Site Plan.
Legend
>Soil Vapor Sampling Point
Approx. Building Outline
Approximate Parcel Boundary
Approximate Site BoundaryOAK STREETWEST TENTH STREET
Soil Vapor Analytical Map (July 5, 2023)
Vernon Packaging
850 Trade Street
Winston-Salem, North CarolinaNORTH TRADE STREETSV-1
3
EXHIBITNO.Project No.:
Scale: 1" = 100'
File Name:
Date:July 2023
Vernon Pkg.
Project Manager.:MIM
Drawn by:
Reviewed by:
Approved by:EW
AAF
EW
SV-2 SV-3 SV-4
SV-6SV-5
SV-7
SV-8
SV-9
SV-2 VOCs by TO-15Acetone = 300 ug/m3 Ethanol = 170 ug/m3 Ethylbenzene = 5.5 ug/m3 2-Butanone = 18 ug/m3 2-Propanol = 29 ug/m3 Styrene = 6.3 ug/m3 Tetrahydrofuran = 34 ug/m3 Toluene = 22 ug/m3m+p Xylenes = 10 ug/m3
SV-4 VOCs by TO-15 Acetone = 56 ug/m3Freon 11 = 580 ug/m3Freon 12 = 73 ug/m3
BOLD indicates concentrations above The NCDEQ ResidentialVapor Intrusion Screening Levels, Updated February 2018
7327-G West Friendly AvenueGreensboro, NC 27410

TABLES

Table 1Soil Gas Analytical Results SummaryVernon PackagingWinston-Salem, North CarolinaTerracon Project No. 75217006SV-2D10/17/2022 3/2/2023 7/5/2023 10/17/2022 10/17/2022 3/2/2023 7/5/2023Method Analyte Result Result Result Result Result Result ResultPID TOTAL VOCs* 0.1 0.4 0.0 -- 0.2 0.5 0.0 --ACETONE <244.02 300 34 59 35.9 56220000BENZENE <3.2 <0.639 <3.5 <3.2 <3.41.21<3.4 12CHLOROFORM <4.9 <0.973 <5.4 <4.9 <5.140.5<5.3 4.1CHLOROMETHANE <21 <0.413 <23 <21 <221.13<22 630CYCLOHEXANE <3.5 <0.689 <3.8 <3.5 <3.6 <0.689 <3.7 42000ETHANOL25 15.3 170 31 21 30.7<20 NEETHYLBENZENE <4.4 <0.8675.5<4.4 <4.61.20<4.7 374-ETHYL TOLUENE <5.0 <0.982 <5.4 <5.0 <5.2 <0.982 <5.3 NEFREON 11 / TRICHLOROFLUOROMETHANE 87 35.6<6.284<5.91.75 580NEFREON 12 / DICHLORODIFLUOROMETHANE <5.02.37<5.55.0<5.22.04 73700HEPTANE <4.1 <0.818 <4.5 <4.1 <4.31.00<4.4 2800N-HEXANE <3.6 <2.22 <3.9 <3.6 <3.7 <2.22 <3.8 49004-METHYL-2-PENTANONE / METHYL ISOBUTYL KETONE5.3<5.12 <4.56.2<4.3 <5.12 <4.4 21000METHYLENE CHLORIDE <35 <0.694 <38 <35 <361.74<38 34002-BUTANONE (MEK) <12 <3.6918<12 <128.17<13 350002-PROPANOL / ISOPROPANOL <9.98.33 29<9.9 <107.42<11 1400STYRENE <4.3 <0.8516.3<4.3 <4.51.17<4.6 7000TETRACHLOROETHYLENE21<1.36 <7.5100<7.1451<7.3 280TETRAHYDROFURAN <3.0 <0.59034<3.07.4<0.590 <3.2 14000TOLUENE <3.82.72 22<3.8 <4.06.89<8.1 350001,1,1-TRICHLOROETHANE <5.5 <1.09 <6.0 <5.5 <5.7 <1.09 <5.9 35000TRICHLOROETHYLENE <5.4 <1.07 <6.038<5.6 <1.07 <5.8 141,2,4-TRIMETHYLBENZENE <5.0 <0.982 <5.4 <5.0 <5.21.05<5.3 4201,3,5-TRIMETHYLBENZENE <5.0 <0.982 <5.4 <5.0 <5.2 <0.982 <5.3 3202,2,4-TRIMETHYLPENTANE <4.7 <0.934 <5.2 <4.7 <4.9 <0.934 <5.0 NEM&P-XYLENE <4.42.06 10<4.4 <4.62.8<9.4 700O-XYLENE <4.4 <0.867 <4.8 <4.4 <4.61.06<4.7 700Notes:VOCs - volatile organic compoundsPID - Photo Ionization Detector Compounds detected in one or more samples shownE - The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).*PID Concentrations listed in parts per million (ppm) Concentrations of analytes are reported in micrograms per cubic meter (µg/m3)Bold indicates concentration above the Reported Detection Limit TO-15Date CollectedSample IDSub-slab and Exterior Soil Gas Screening Level SV-2 SV-4
Table 2 Historical Soil Gas Analytical Results SummaryVernon PackagingWinston-Salem, North CarolinaTerracon Project No. 75217006SV-2D DUP-110/17/2022 3/2/2023 10/17/2022 3/2/2023 7/5/2023 10/17/2022 3/2/2023 10/17/2022 3/2/2023 10/17/2022 3/2/2023 7/5/2023 10/17/2022 3/2/2023 10/17/2022 3/2/2023 10/17/2022 3/2/2023 10/17/2022 3/2/2023 10/17/2022 3/2/2023Method Analyte Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result ResultResult Result ResultPID TOTAL VOCs* 0.2 0.3 0.1 0.4 0.0 -- -- 0.1 0.4 0.2 0.5 0.0 0.2 0.2 0.5 0.7 <0.1 0.3 <0.1 0.2 0.2 0.3 0.7 --ACETONE45 5.30<244.02 300 34 20.9 32 5.54 59 35.9 56 100 13.6 30 168 32 12.5 60 9.43 74 44.0300 220000BENZENE <3.2 <0.639 <3.2 <0.639 <3.5 <3.2 <0.639 <3.2 <0.639 <3.41.21<3.4 <3.3 <0.639 <3.21.04<3.4 <0.639 <3.326.0<3.3 <0.639 26 12CHLOROFORM <4.9 <0.973 <4.9 <0.973 <5.4 <4.9 <0.973 <4.83.15<5.140.5<5.35.1<0.973 <4.9 <0.973 <4.968.6<4.9 <0.973 <4.9 <0.973 68.6 4.1CHLOROMETHANE <21 <0.413 <21 <0.413 <23 <21 <0.413 <20 <0.413 <221.13<22 <21 <0.413 <211.39<22 <0.413 <21 <0.413 <210.7251.39 630CYCLOHEXANE <3.5 <0.689 <3.5 <0.689 <3.8 <3.5 <0.689 <3.4 <0.689 <3.6 <0.689 <3.7 <3.5 <0.689 <3.53.05<3.7 <0.689 <3.51.95<3.50.9263.05 42000ETHANOL45 11.1 25 15.3 170 31 23.4 23 10.3 21 30.7<2075 50.9<19266 E 67 40.7 38 25.8 38 46.6170 NEETHYLBENZENE <4.4 <0.867 <4.4 <0.8675.5<4.41.00<4.3 <0.867 <4.61.20<4.7 <4.51.49<4.41.19<4.60.910<4.577.2<4.5 <0.867 77.2 374-ETHYL TOLUENE <5.0 <0.982 <5.0 <0.982 <5.4 <5.0 <0.982 <4.9 <0.982 <5.2 <0.982 <5.3 <5.1<0.982<5.0 <0.982 <5.3 <0.982 <5.166.7<5.1 <0.982 66.7 NEFREON 11 / TRICHLOROFLUOROMETHANE 56 35.2 87 35.6<6.284 33.0 20 388<5.91.75 580 160 120<5.71.53 310 142 550 123 29 27.2580 NEFREON 12 / DICHLORODIFLUOROMETHANE <5.02.39<5.02.37<5.55.0 2.66<4.918.9<5.22.04 73 10 6.73<5.01.48<5.035.2 54 6.53<5.02.7273 700HEPTANE <4.1 <0.818 <4.1 <0.818 <4.5 <4.1 <0.818 <4.0 <0.818 <4.31.00<4.4 <4.2 <0.818 <4.11.87<4.4 <0.818 <4.2 <0.818 <4.2 <0.818 1.87 2800N-HEXANE <3.6 <2.22 <3.6 <2.22 <3.9 <3.6 <2.22 <3.5 <2.22 <3.7 <2.22 <3.8 <3.6 <2.22 <3.62.57<3.8 <2.22 <3.65.22<3.6 <2.22 5.22 49004-METHYL-2-PENTANONE / METHYL ISOBUTYL KETONE <4.1 <5.125.3<5.12 <4.56.2<5.128.7<5.12 <4.3 <5.12 <4.47.3<5.12 <4.15.57 13<5.12 <4.1 <5.12 <4.1 <5.12 13 21000METHYLENE CHLORIDE <35 <0.694 <35 <0.694 <38 <35 <0.694 <34 <0.694 <361.74<38 <36 <0.694 <35 <0.694 <372.36<362.06<362.502.36 34002-BUTANONE (MEK) <12 <3.69 <12 <3.6918<12 <3.69 <12 <3.69 <128.17<13 <12 <3.69 <1210.3<13 <3.69 <12 <3.69 <1217.618 350002-PROPANOL / ISOPROPANOL <9.970.5<9.98.33 29<9.917.5<9.73.44<107.42<11 <1025.3<9.954.8<9.912.0 10 J 8.41<9.916.670.5 1400STYRENE <4.3 <0.851 <4.3 <0.8516.3<4.3 <0.851 <4.2 <0.851 <4.51.17<4.6 <4.4 <0.851 <4.3 <0.851 <4.6 <0.851 <4.4 <0.851 <4.4 <0.851 6.3 7000TETRACHLOROETHYLENE <6.8 <1.3621<1.36 <7.5100<1.36 <6.74.47<7.1451<7.3 <7.01.85<6.82.23<6.8 <1.36 <6.8 <1.36 <6.87.74451 280TETRAHYDROFURAN <3.0 <0.590 <3.0 <0.59034<3.0 <0.590 <2.9 <0.5907.4<0.590 <3.29.5<0.5903.3<0.5903.8<0.5903.3<0.5906.3 11034 14000TOLUENE <3.8 <1.88 <3.82.72 22<3.83.99<3.72.07<4.06.89<8.1 <3.95.95<3.8 <1.88 <4.08.85<3.92.50<3.96.2922 350001,1,1-TRICHLOROETHANE <5.5 <1.09 <5.5 <1.09 <6.0 <5.5 <1.09 <5.4 <1.09 <5.7 <1.09 <5.9 <5.6 <1.09 <5.5 <1.09 <5.5 <1.09 <5.53.64 8.1 1.968.1 35000TRICHLOROETHYLENE <5.4 <1.07 <5.4 <1.07 <6.038<1.07 <5.3 <1.07 <5.6 <1.07 <5.8 <5.5 <1.07 <5.4 <1.07 <5.4 <1.07 <5.4 <1.07 <5.4 <1.07 38 141,2,4-TRIMETHYLBENZENE <5.0 <0.982 <5.0 <0.982 <5.4 <5.0 <0.982 <4.9 <0.982 <5.21.05<5.3 <5.11.58<5.01.97<0.982 <0.982 <5.1172<5.1 <0.982 172 4201,3,5-TRIMETHYLBENZENE <5.0 <0.982 <5.0 <0.982 <5.4 <5.0 <0.982 <4.9 <0.982 <5.2 <0.982 <5.3 <5.1 <0.982 <5.0 <0.982 <0.982 <0.982 <5.147.1<5.1 <0.982 47.1 3202,2,4-TRIMETHYLPENTANE <4.7 <0.934 <4.7 <0.934 <5.2 <4.7 <0.934 <4.6 <0.934 <4.9 <0.934 <5.0 <4.8 <0.934 <4.728.6<0.934 <0.934 <4.88.50<4.8 <0.934 28.6 NEM&P-XYLENE <4.4 <1.73 <4.42.06 10<4.42.96<4.32.46<4.62.8<9.4 <4.54.42<4.44.08<4.62.26<4.5122<4.51.90122 700O-XYLENE <4.4 <0.867 <4.4 <0.867 <4.8 <4.40.928<4.3 <0.867 <4.61.06<4.7 <4.51.68<4.41.77<4.6 <0.867 <4.52.99<4.5 <0.867 2.99 700Notes:VOCs - volatile organic compoundsPID - Photo Ionization Detector Compounds detected in one or more samples shownE - The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).*PID Concentrations listed in parts per million (ppm) Concentrations of analytes are reported in micrograms per cubic meter (µg/m3)Bold indicates concentration above the Reported Detection Limit Maximum Concentration Reported (All Dates)Sub-slab and Exterior Soil Gas Screening Level Date CollectedTO-15SV-5 SV-6 SV-7 SV-8 SV-9Sample IDSV-1 SV-2 SV-3 SV-4

APPENDIX A
LABORATORY ANALYTICAL RESULTS AND CHAIN OF CUSTODY

7/19/2023
Laura Elliott
Terracon Consulting Engineers
7327-G West Friendly Avenue
Greensboro NC 27410
Project Name: Vernon Packaging
Project #:
Dear Laura Elliott
The following report includes the data for the above referenced project for sample(s)
received on 7/6/2023 at Eurofins Air Toxics LLC.
The data and associated QC analyzed by TO-15 are compliant with the project
requirements or laboratory criteria with the exception of the deviations noted in the
attached case narrative.
Thank you for choosing Eurofins Air Toxics LLC. for your air analysis needs. Eurofins Air
Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free
to contact the Project Manager: Brian Whittaker at 916-985-1000 if you have any
questions regarding the data in this report.
Regards,
Brian Whittaker
Project Manager
Workorder #: 2307103
Page 1 of 16
Laura Elliott
Terracon Consulting Engineers
7327-G West Friendly Avenue
Greensboro, NC 27410
WORK ORDER #: 2307103
CLIENT:BILL TO:
PHONE:
Laura Elliott
Terracon Consulting Engineers
7327-G West Friendly Avenue
Greensboro, NC 27410
336-854-8135
07/06/2023
DATE COMPLETED:07/19/2023
P.O. #75217006
PROJECT #Vernon Packaging
Work Order Summary
FAX:
DATE RECEIVED:CONTACT:Brian Whittaker
NAMEFRACTION #TEST VAC./PRES.
RECEIPT
PRESSURE
FINAL
01A SVP-2 TO-15 7.3 "Hg 10 psi
02A SVP-4 TO-15 6.9 "Hg 9.8 psi
03A Lab Blank TO-15 NA NA
04A CCV TO-15 NA NA
05A LCS TO-15 NA NA
05AA LCSD TO-15 NA NA
CERTIFIED BY:
Technical Director
DATE: 07/19/23
Page 2 of 16
Certification numbers: AZ Licensure AZ0775, FL NELAP – E87680, LA NELAP – 02089, NH NELAP – 209222, NJ NELAP - CA016,
NY NELAP - 11291, TX NELAP – T104704434-22-18, UT NELAP – CA009332022-14, VA NELAP - 12240, WA ELAP - C935
Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) CA300005-017
Eurofins Environment Testing Northern California, LLC certifies that the test results contained in this report meet
all requirements of the 2016 TNI Standard.
This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, LLC.
180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630
[phone] . [phone] . FAX [phone]
LABORATORY NARRATIVE
EPA Method TO-15
Terracon Consulting Engineers
Workorder# 2307103
Two 1 Liter Summa Canister (100% Certified) samples were received on July 06, 2023. The laboratory
performed analysis via EPA Method TO-15 using GC/MS in the full scan mode.
There were no receiving discrepancies.
Receiving Notes
There were no analytical discrepancies.
Analytical Notes
Ten qualifiers may have been used on the data analysis sheets and indicates as follows:
B - Compound present in laboratory blank greater than reporting limit (background subtraction not
performed).
J - Estimated value.
E - Exceeds instrument calibration range.
S - Saturated peak.
Q - Exceeds quality control limits.
U - Compound analyzed for but not detected above the reporting limit, LOD, or MDL value. See
data page for project specific U-flag definition.
UJ- Non-detected compound associated with low bias in the CCV
N - The identification is based on presumptive evidence.
M - Reported value may be biased due to apparent matrix interferences.
CN - See Case Narrative.
File extensions may have been used on the data analysis sheets and indicates
as follows:
a-File was requantified
b-File was quantified by a second column and detector
r1-File was requantified for the purpose of reissue
Definition of Data Qualifying Flags
Page 3 of 16
EPA METHOD TO-15 GC/MS FULL SCAN
Summary of Detected Compounds
Client Sample ID: SVP-2
Lab ID#: 2307103-01A
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
11 93 21 170Ethanol
11 120 26 300Acetone
4.4 12 11 292-Propanol
4.4 6.1 13 182-Butanone (Methyl Ethyl Ketone)
1.1 12 3.3 34Tetrahydrofuran
2.2 5.9 8.4 22Toluene
1.1 1.3 4.8 5.5Ethyl Benzene
2.2 2.4 9.6 10m,p-Xylene
1.1 1.5 4.7 6.3Styrene
Client Sample ID: SVP-4
Lab ID#: 2307103-02A
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
1.1 15 5.3 73Freon 12
1.1 100 6.1 580Freon 11
11 24 26 56Acetone
Page 4 of 16
Client Sample ID: SVP-2
Lab ID#: 2307103-01A
EPA METHOD TO-15 GC/MS FULL SCAN
91071415File Name:
Dil. Factor:2.22
Date of Collection: 7/5/23 2:03:00 PM
Date of Analysis: 7/14/23 04:26 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
1.1 Not Detected 5.5 Not DetectedFreon 12
1.1 Not Detected 7.8 Not DetectedFreon 114
11 Not Detected 23 Not DetectedChloromethane
1.1 Not Detected 2.8 Not DetectedVinyl Chloride
1.1 Not Detected 2.4 Not Detected1,3-Butadiene
11 Not Detected 43 Not DetectedBromomethane
4.4 Not Detected 12 Not DetectedChloroethane
1.1 Not Detected 6.2 Not DetectedFreon 11
11 93 21 170Ethanol
1.1 Not Detected 8.5 Not DetectedFreon 113
1.1 Not Detected 4.4 Not Detected1,1-Dichloroethene
11 120 26 300Acetone
4.4 12 11 292-Propanol
4.4 Not Detected 14 Not DetectedCarbon Disulfide
4.4 Not Detected 14 Not Detected3-Chloropropene
11 Not Detected 38 Not DetectedMethylene Chloride
4.4 Not Detected 16 Not DetectedMethyl tert-butyl ether
1.1 Not Detected 4.4 Not Detectedtrans-1,2-Dichloroethene
1.1 Not Detected 3.9 Not DetectedHexane
1.1 Not Detected 4.5 Not Detected1,1-Dichloroethane
4.4 6.1 13 182-Butanone (Methyl Ethyl Ketone)
1.1 Not Detected 4.4 Not Detectedcis-1,2-Dichloroethene
1.1 12 3.3 34Tetrahydrofuran
1.1 Not Detected 5.4 Not DetectedChloroform
1.1 Not Detected 6.0 Not Detected1,1,1-Trichloroethane
1.1 Not Detected 3.8 Not DetectedCyclohexane
1.1 Not Detected 7.0 Not DetectedCarbon Tetrachloride
1.1 Not Detected 5.2 Not Detected2,2,4-Trimethylpentane
1.1 Not Detected 3.5 Not DetectedBenzene
1.1 Not Detected 4.5 Not Detected1,2-Dichloroethane
1.1 Not Detected 4.5 Not DetectedHeptane
1.1 Not Detected 6.0 Not DetectedTrichloroethene
1.1 Not Detected 5.1 Not Detected1,2-Dichloropropane
4.4 Not Detected 16 Not Detected1,4-Dioxane
1.1 Not Detected 7.4 Not DetectedBromodichloromethane
1.1 Not Detected 5.0 Not Detectedcis-1,3-Dichloropropene
1.1 Not Detected 4.5 Not Detected4-Methyl-2-pentanone
2.2 5.9 8.4 22Toluene
1.1 Not Detected 5.0 Not Detectedtrans-1,3-Dichloropropene
1.1 Not Detected 6.0 Not Detected1,1,2-Trichloroethane
1.1 Not Detected 7.5 Not DetectedTetrachloroethene
4.4 Not Detected 18 Not Detected2-Hexanone
Page 5 of 16
Client Sample ID: SVP-2
Lab ID#: 2307103-01A
EPA METHOD TO-15 GC/MS FULL SCAN
91071415File Name:
Dil. Factor:2.22
Date of Collection: 7/5/23 2:03:00 PM
Date of Analysis: 7/14/23 04:26 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
1.1 Not Detected 9.4 Not DetectedDibromochloromethane
1.1 Not Detected 8.5 Not Detected1,2-Dibromoethane (EDB)
1.1 Not Detected 5.1 Not DetectedChlorobenzene
1.1 1.3 4.8 5.5Ethyl Benzene
2.2 2.4 9.6 10m,p-Xylene
1.1 Not Detected 4.8 Not Detectedo-Xylene
1.1 1.5 4.7 6.3Styrene
1.1 Not Detected 11 Not DetectedBromoform
1.1 Not Detected 5.4 Not DetectedCumene
1.1 Not Detected 7.6 Not Detected1,1,2,2-Tetrachloroethane
1.1 Not Detected 5.4 Not DetectedPropylbenzene
1.1 Not Detected 5.4 Not Detected4-Ethyltoluene
1.1 Not Detected 5.4 Not Detected1,3,5-Trimethylbenzene
1.1 Not Detected 5.4 Not Detected1,2,4-Trimethylbenzene
1.1 Not Detected 6.7 Not Detected1,3-Dichlorobenzene
1.1 Not Detected 6.7 Not Detected1,4-Dichlorobenzene
1.1 Not Detected 5.7 Not Detectedalpha-Chlorotoluene
1.1 Not Detected 6.7 Not Detected1,2-Dichlorobenzene
4.4 Not Detected 33 Not Detected1,2,4-Trichlorobenzene
4.4 Not Detected 47 Not DetectedHexachlorobutadiene
2.2 Not Detected 12 Not DetectedNaphthalene
Container Type: 1 Liter Summa Canister (100% Certified)
Limits%RecoverySurrogates
Method
96 70-130Toluene-d8
107 70-1301,2-Dichloroethane-d4
99 70-1304-Bromofluorobenzene
Page 6 of 16
Client Sample ID: SVP-4
Lab ID#: 2307103-02A
EPA METHOD TO-15 GC/MS FULL SCAN
91071414File Name:
Dil. Factor:2.16
Date of Collection: 7/5/23 12:02:00 PM
Date of Analysis: 7/14/23 03:59 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
1.1 15 5.3 73Freon 12
1.1 Not Detected 7.6 Not DetectedFreon 114
11 Not Detected 22 Not DetectedChloromethane
1.1 Not Detected 2.8 Not DetectedVinyl Chloride
1.1 Not Detected 2.4 Not Detected1,3-Butadiene
11 Not Detected 42 Not DetectedBromomethane
4.3 Not Detected 11 Not DetectedChloroethane
1.1 100 6.1 580Freon 11
11 Not Detected 20 Not DetectedEthanol
1.1 Not Detected 8.3 Not DetectedFreon 113
1.1 Not Detected 4.3 Not Detected1,1-Dichloroethene
11 24 26 56Acetone
4.3 Not Detected 11 Not Detected2-Propanol
4.3 Not Detected 13 Not DetectedCarbon Disulfide
4.3 Not Detected 14 Not Detected3-Chloropropene
11 Not Detected 38 Not DetectedMethylene Chloride
4.3 Not Detected 16 Not DetectedMethyl tert-butyl ether
1.1 Not Detected 4.3 Not Detectedtrans-1,2-Dichloroethene
1.1 Not Detected 3.8 Not DetectedHexane
1.1 Not Detected 4.4 Not Detected1,1-Dichloroethane
4.3 Not Detected 13 Not Detected2-Butanone (Methyl Ethyl Ketone)
1.1 Not Detected 4.3 Not Detectedcis-1,2-Dichloroethene
1.1 Not Detected 3.2 Not DetectedTetrahydrofuran
1.1 Not Detected 5.3 Not DetectedChloroform
1.1 Not Detected 5.9 Not Detected1,1,1-Trichloroethane
1.1 Not Detected 3.7 Not DetectedCyclohexane
1.1 Not Detected 6.8 Not DetectedCarbon Tetrachloride
1.1 Not Detected 5.0 Not Detected2,2,4-Trimethylpentane
1.1 Not Detected 3.4 Not DetectedBenzene
1.1 Not Detected 4.4 Not Detected1,2-Dichloroethane
1.1 Not Detected 4.4 Not DetectedHeptane
1.1 Not Detected 5.8 Not DetectedTrichloroethene
1.1 Not Detected 5.0 Not Detected1,2-Dichloropropane
4.3 Not Detected 16 Not Detected1,4-Dioxane
1.1 Not Detected 7.2 Not DetectedBromodichloromethane
1.1 Not Detected 4.9 Not Detectedcis-1,3-Dichloropropene
1.1 Not Detected 4.4 Not Detected4-Methyl-2-pentanone
2.2 Not Detected 8.1 Not DetectedToluene
1.1 Not Detected 4.9 Not Detectedtrans-1,3-Dichloropropene
1.1 Not Detected 5.9 Not Detected1,1,2-Trichloroethane
1.1 Not Detected 7.3 Not DetectedTetrachloroethene
4.3 Not Detected 18 Not Detected2-Hexanone
Page 7 of 16
Client Sample ID: SVP-4
Lab ID#: 2307103-02A
EPA METHOD TO-15 GC/MS FULL SCAN
91071414File Name:
Dil. Factor:2.16
Date of Collection: 7/5/23 12:02:00 PM
Date of Analysis: 7/14/23 03:59 PM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
1.1 Not Detected 9.2 Not DetectedDibromochloromethane
1.1 Not Detected 8.3 Not Detected1,2-Dibromoethane (EDB)
1.1 Not Detected 5.0 Not DetectedChlorobenzene
1.1 Not Detected 4.7 Not DetectedEthyl Benzene
2.2 Not Detected 9.4 Not Detectedm,p-Xylene
1.1 Not Detected 4.7 Not Detectedo-Xylene
1.1 Not Detected 4.6 Not DetectedStyrene
1.1 Not Detected 11 Not DetectedBromoform
1.1 Not Detected 5.3 Not DetectedCumene
1.1 Not Detected 7.4 Not Detected1,1,2,2-Tetrachloroethane
1.1 Not Detected 5.3 Not DetectedPropylbenzene
1.1 Not Detected 5.3 Not Detected4-Ethyltoluene
1.1 Not Detected 5.3 Not Detected1,3,5-Trimethylbenzene
1.1 Not Detected 5.3 Not Detected1,2,4-Trimethylbenzene
1.1 Not Detected 6.5 Not Detected1,3-Dichlorobenzene
1.1 Not Detected 6.5 Not Detected1,4-Dichlorobenzene
1.1 Not Detected 5.6 Not Detectedalpha-Chlorotoluene
1.1 Not Detected 6.5 Not Detected1,2-Dichlorobenzene
4.3 Not Detected 32 Not Detected1,2,4-Trichlorobenzene
4.3 Not Detected 46 Not DetectedHexachlorobutadiene
2.2 Not Detected 11 Not DetectedNaphthalene
Container Type: 1 Liter Summa Canister (100% Certified)
Limits%RecoverySurrogates
Method
96 70-130Toluene-d8
106 70-1301,2-Dichloroethane-d4
106 70-1304-Bromofluorobenzene
Page 8 of 16
Client Sample ID: Lab Blank
Lab ID#: 2307103-03A
EPA METHOD TO-15 GC/MS FULL SCAN
91071406cFile Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 11:34 AM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.50 Not Detected 2.5 Not DetectedFreon 12
0.50 Not Detected 3.5 Not DetectedFreon 114
5.0 Not Detected 10 Not DetectedChloromethane
0.50 Not Detected 1.3 Not DetectedVinyl Chloride
0.50 Not Detected 1.1 Not Detected1,3-Butadiene
5.0 Not Detected 19 Not DetectedBromomethane
2.0 Not Detected 5.3 Not DetectedChloroethane
0.50 Not Detected 2.8 Not DetectedFreon 11
5.0 Not Detected 9.4 Not DetectedEthanol
0.50 Not Detected 3.8 Not DetectedFreon 113
0.50 Not Detected 2.0 Not Detected1,1-Dichloroethene
5.0 Not Detected 12 Not DetectedAcetone
2.0 Not Detected 4.9 Not Detected2-Propanol
2.0 Not Detected 6.2 Not DetectedCarbon Disulfide
2.0 Not Detected 6.3 Not Detected3-Chloropropene
5.0 Not Detected 17 Not DetectedMethylene Chloride
2.0 Not Detected 7.2 Not DetectedMethyl tert-butyl ether
0.50 Not Detected 2.0 Not Detectedtrans-1,2-Dichloroethene
0.50 Not Detected 1.8 Not DetectedHexane
0.50 Not Detected 2.0 Not Detected1,1-Dichloroethane
2.0 Not Detected 5.9 Not Detected2-Butanone (Methyl Ethyl Ketone)
0.50 Not Detected 2.0 Not Detectedcis-1,2-Dichloroethene
0.50 Not Detected 1.5 Not DetectedTetrahydrofuran
0.50 Not Detected 2.4 Not DetectedChloroform
0.50 Not Detected 2.7 Not Detected1,1,1-Trichloroethane
0.50 Not Detected 1.7 Not DetectedCyclohexane
0.50 Not Detected 3.1 Not DetectedCarbon Tetrachloride
0.50 Not Detected 2.3 Not Detected2,2,4-Trimethylpentane
0.50 Not Detected 1.6 Not DetectedBenzene
0.50 Not Detected 2.0 Not Detected1,2-Dichloroethane
0.50 Not Detected 2.0 Not DetectedHeptane
0.50 Not Detected 2.7 Not DetectedTrichloroethene
0.50 Not Detected 2.3 Not Detected1,2-Dichloropropane
2.0 Not Detected 7.2 Not Detected1,4-Dioxane
0.50 Not Detected 3.4 Not DetectedBromodichloromethane
0.50 Not Detected 2.3 Not Detectedcis-1,3-Dichloropropene
0.50 Not Detected 2.0 Not Detected4-Methyl-2-pentanone
1.0 Not Detected 3.8 Not DetectedToluene
0.50 Not Detected 2.3 Not Detectedtrans-1,3-Dichloropropene
0.50 Not Detected 2.7 Not Detected1,1,2-Trichloroethane
0.50 Not Detected 3.4 Not DetectedTetrachloroethene
2.0 Not Detected 8.2 Not Detected2-Hexanone
Page 9 of 16
Client Sample ID: Lab Blank
Lab ID#: 2307103-03A
EPA METHOD TO-15 GC/MS FULL SCAN
91071406cFile Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 11:34 AM
(ug/m3)(ug/m3)(ppbv)(ppbv)Compound
AmountRpt. LimitAmountRpt. Limit
0.50 Not Detected 4.2 Not DetectedDibromochloromethane
0.50 Not Detected 3.8 Not Detected1,2-Dibromoethane (EDB)
0.50 Not Detected 2.3 Not DetectedChlorobenzene
0.50 Not Detected 2.2 Not DetectedEthyl Benzene
1.0 Not Detected 4.3 Not Detectedm,p-Xylene
0.50 Not Detected 2.2 Not Detectedo-Xylene
0.50 Not Detected 2.1 Not DetectedStyrene
0.50 Not Detected 5.2 Not DetectedBromoform
0.50 Not Detected 2.4 Not DetectedCumene
0.50 Not Detected 3.4 Not Detected1,1,2,2-Tetrachloroethane
0.50 Not Detected 2.4 Not DetectedPropylbenzene
0.50 Not Detected 2.4 Not Detected4-Ethyltoluene
0.50 Not Detected 2.4 Not Detected1,3,5-Trimethylbenzene
0.50 Not Detected 2.4 Not Detected1,2,4-Trimethylbenzene
0.50 Not Detected 3.0 Not Detected1,3-Dichlorobenzene
0.50 Not Detected 3.0 Not Detected1,4-Dichlorobenzene
0.50 Not Detected 2.6 Not Detectedalpha-Chlorotoluene
0.50 Not Detected 3.0 Not Detected1,2-Dichlorobenzene
2.0 Not Detected 15 Not Detected1,2,4-Trichlorobenzene
2.0 Not Detected 21 Not DetectedHexachlorobutadiene
1.0 Not Detected 5.2 Not DetectedNaphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
97 70-130Toluene-d8
111 70-1301,2-Dichloroethane-d4
100 70-1304-Bromofluorobenzene
Page 10 of 16
Client Sample ID: CCV
Lab ID#: 2307103-04A
EPA METHOD TO-15 GC/MS FULL SCAN
91071403File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 09:50 AM
%RecoveryCompound
102Freon 12
100Freon 114
97Chloromethane
103Vinyl Chloride
1011,3-Butadiene
94Bromomethane
96Chloroethane
100Freon 11
93Ethanol
106Freon 113
1021,1-Dichloroethene
94Acetone
972-Propanol
100Carbon Disulfide
983-Chloropropene
101Methylene Chloride
106Methyl tert-butyl ether
101trans-1,2-Dichloroethene
99Hexane
981,1-Dichloroethane
982-Butanone (Methyl Ethyl Ketone)
106cis-1,2-Dichloroethene
94Tetrahydrofuran
99Chloroform
1041,1,1-Trichloroethane
102Cyclohexane
100Carbon Tetrachloride
952,2,4-Trimethylpentane
109Benzene
1011,2-Dichloroethane
117Heptane
97Trichloroethene
951,2-Dichloropropane
981,4-Dioxane
95Bromodichloromethane
97cis-1,3-Dichloropropene
944-Methyl-2-pentanone
100Toluene
97trans-1,3-Dichloropropene
941,1,2-Trichloroethane
107Tetrachloroethene
982-Hexanone
Page 11 of 16
Client Sample ID: CCV
Lab ID#: 2307103-04A
EPA METHOD TO-15 GC/MS FULL SCAN
91071403File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 09:50 AM
%RecoveryCompound
100Dibromochloromethane
901,2-Dibromoethane (EDB)
98Chlorobenzene
104Ethyl Benzene
100m,p-Xylene
100o-Xylene
94Styrene
94Bromoform
99Cumene
941,1,2,2-Tetrachloroethane
105Propylbenzene
1124-Ethyltoluene
1001,3,5-Trimethylbenzene
1001,2,4-Trimethylbenzene
1081,3-Dichlorobenzene
1001,4-Dichlorobenzene
93alpha-Chlorotoluene
1061,2-Dichlorobenzene
1031,2,4-Trichlorobenzene
101Hexachlorobutadiene
103Naphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
100 70-130Toluene-d8
98 70-1301,2-Dichloroethane-d4
94 70-1304-Bromofluorobenzene
Page 12 of 16
Client Sample ID: LCS
Lab ID#: 2307103-05A
EPA METHOD TO-15 GC/MS FULL SCAN
91071404File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 10:40 AM
Limits%RecoveryCompound
Method
99 70-130Freon 12
102 70-130Freon 114
93 70-130Chloromethane
98 70-130Vinyl Chloride
96 70-1301,3-Butadiene
94 70-130Bromomethane
96 70-130Chloroethane
95 70-130Freon 11
122 70-130Ethanol
103 70-130Freon 113
105 70-1301,1-Dichloroethene
98 70-130Acetone
108 70-1302-Propanol
105 70-130Carbon Disulfide
102 70-1303-Chloropropene
94 70-130Methylene Chloride
105 70-130Methyl tert-butyl ether
104 70-130trans-1,2-Dichloroethene
101 70-130Hexane
100 70-1301,1-Dichloroethane
99 70-1302-Butanone (Methyl Ethyl Ketone)
105 70-130cis-1,2-Dichloroethene
102 70-130Tetrahydrofuran
96 70-130Chloroform
106 70-1301,1,1-Trichloroethane
110 70-130Cyclohexane
98 70-130Carbon Tetrachloride
96 70-1302,2,4-Trimethylpentane
103 70-130Benzene
93 70-1301,2-Dichloroethane
107 70-130Heptane
94 70-130Trichloroethene
91 70-1301,2-Dichloropropane
106 70-1301,4-Dioxane
99 70-130Bromodichloromethane
96 70-130cis-1,3-Dichloropropene
87 70-1304-Methyl-2-pentanone
96 70-130Toluene
97 70-130trans-1,3-Dichloropropene
94 70-1301,1,2-Trichloroethane
110 70-130Tetrachloroethene
95 70-1302-Hexanone
Page 13 of 16
Client Sample ID: LCS
Lab ID#: 2307103-05A
EPA METHOD TO-15 GC/MS FULL SCAN
91071404File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 10:40 AM
Limits%RecoveryCompound
Method
98 70-130Dibromochloromethane
94 70-1301,2-Dibromoethane (EDB)
101 70-130Chlorobenzene
103 70-130Ethyl Benzene
98 70-130m,p-Xylene
100 70-130o-Xylene
96 70-130Styrene
99 70-130Bromoform
98 70-130Cumene
93 70-1301,1,2,2-Tetrachloroethane
102 70-130Propylbenzene
104 70-1304-Ethyltoluene
99 70-1301,3,5-Trimethylbenzene
100 70-1301,2,4-Trimethylbenzene
104 70-1301,3-Dichlorobenzene
98 70-1301,4-Dichlorobenzene
93 70-130alpha-Chlorotoluene
102 70-1301,2-Dichlorobenzene
105 70-1301,2,4-Trichlorobenzene
102 70-130Hexachlorobutadiene
102 60-140Naphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
98 70-130Toluene-d8
97 70-1301,2-Dichloroethane-d4
101 70-1304-Bromofluorobenzene
Page 14 of 16
Client Sample ID: LCSD
Lab ID#: 2307103-05AA
EPA METHOD TO-15 GC/MS FULL SCAN
91071405File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 11:07 AM
Limits%RecoveryCompound
Method
97 70-130Freon 12
96 70-130Freon 114
93 70-130Chloromethane
98 70-130Vinyl Chloride
96 70-1301,3-Butadiene
94 70-130Bromomethane
94 70-130Chloroethane
97 70-130Freon 11
117 70-130Ethanol
99 70-130Freon 113
94 70-1301,1-Dichloroethene
93 70-130Acetone
107 70-1302-Propanol
98 70-130Carbon Disulfide
96 70-1303-Chloropropene
95 70-130Methylene Chloride
102 70-130Methyl tert-butyl ether
97 70-130trans-1,2-Dichloroethene
97 70-130Hexane
95 70-1301,1-Dichloroethane
97 70-1302-Butanone (Methyl Ethyl Ketone)
106 70-130cis-1,2-Dichloroethene
100 70-130Tetrahydrofuran
96 70-130Chloroform
105 70-1301,1,1-Trichloroethane
107 70-130Cyclohexane
98 70-130Carbon Tetrachloride
96 70-1302,2,4-Trimethylpentane
101 70-130Benzene
93 70-1301,2-Dichloroethane
108 70-130Heptane
96 70-130Trichloroethene
91 70-1301,2-Dichloropropane
105 70-1301,4-Dioxane
95 70-130Bromodichloromethane
95 70-130cis-1,3-Dichloropropene
89 70-1304-Methyl-2-pentanone
96 70-130Toluene
96 70-130trans-1,3-Dichloropropene
92 70-1301,1,2-Trichloroethane
108 70-130Tetrachloroethene
94 70-1302-Hexanone
Page 15 of 16
Client Sample ID: LCSD
Lab ID#: 2307103-05AA
EPA METHOD TO-15 GC/MS FULL SCAN
91071405File Name:
Dil. Factor:1.00
Date of Collection: NA
Date of Analysis: 7/14/23 11:07 AM
Limits%RecoveryCompound
Method
98 70-130Dibromochloromethane
93 70-1301,2-Dibromoethane (EDB)
100 70-130Chlorobenzene
103 70-130Ethyl Benzene
99 70-130m,p-Xylene
100 70-130o-Xylene
96 70-130Styrene
96 70-130Bromoform
98 70-130Cumene
94 70-1301,1,2,2-Tetrachloroethane
102 70-130Propylbenzene
104 70-1304-Ethyltoluene
99 70-1301,3,5-Trimethylbenzene
101 70-1301,2,4-Trimethylbenzene
105 70-1301,3-Dichlorobenzene
98 70-1301,4-Dichlorobenzene
93 70-130alpha-Chlorotoluene
102 70-1301,2-Dichlorobenzene
105 70-1301,2,4-Trichlorobenzene
103 70-130Hexachlorobutadiene
104 60-140Naphthalene
Container Type: NA - Not Applicable
Limits%RecoverySurrogates
Method
100 70-130Toluene-d8
100 70-1301,2-Dichloroethane-d4
99 70-1304-Bromofluorobenzene
Page 16 of 16

APPENDIX B
RISK CALCULATOR RESULTS
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
8/2/2023
Prepared By:Laura Elliott, PG
Ed Woloszyn, Jr.
North Carolina Department of Environmental Quality
Risk Calculator
Vernon Packaging
Winston-Salem, NC
Brownfields
July 2022
May 2022 EPA RSL Table
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: July 2022Basis: May 2022 EPA RSL TableSite ID: Exposure Unit ID: Description of Exposure Point Concentration Selection:Exposure Point Concentration (ug/m3)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion300 67-64-1 Acetoneug/m373 75-71-8 Dichlorodifluoromethaneug/m35.5 100-41-4 Ethylbenzeneug/m334 109-99-9 ~Tetrahydrofuranug/m329 67-63-0 Isopropanolug/m318 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m36.3 100-42-5 Styreneug/m322 108-88-3 Tolueneug/m3580 75-69-4 Trichlorofluoromethaneug/m310 108-38-3 Xylene, m-ug/m3Input Form 2DSoil Gas Exposure Point Concentration TableNote: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculationsNorth Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2022
Basis: May 2022 EPA RSL Table
Site ID:
Exposure Unit ID:
Receptor Pathway
Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use* NC NC NC
Soil NC NC NC
Groundwater Use* NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water* NC NC NC
Receptor Pathway
Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.5E-07 2.9E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.1E-08 2.3E-03 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator