24028_National Linen_VIRpt_20220623

RD (-
Environmental Consulting
June 23, 2022
Ms. Kathleen Markey — Environmental Specialist
Division of Waste Management — Brownfields Program
North Carolina Department of Environmental Quality
217 West Jones Street
Raleigh, NC 27603
Subject: ADDITIONAL VAPOR INTRUSION SAMPLING REPORT (REV 0)
NATIONAL LINEN SERVICE SITE
1315 SOUTH 5TH AVENUE
WILMINGTON, NEW HANOVER COUNTY, NORTH CAROLINA
NCBP PROJECT NO. 24028-20-065
RDHEC PROJECT NO. 2124.00
Dear Ms. Markey:
4012 Ridgebrook Bluffs Dr.
Raleigh, NC 27603
[phone]
[e-mail]
On behalf of Raleigh Restoration Group, LLC, RDH Environmental Consulting (RDHEC) is pleased
to provide the results of additional vapor intrusion (VI) sampling at the former National Linen
Service Site (parcel R05413-040-002-000). The sampling was performed in accordance with the
approved work plan (Revision 2) submitted on April 22, 2022. The testing took place on May 11
and 12, 2022, and was conducted to augment a prior VI assessment conducted by RDHEC in
September 2020.
In only one out of 10 sub -slab samples collected, the only detected analyte in soil gas to exceed
a non-residential screening level was Chloroform (presumably from chlorination of municipal
water and not VI). While Trichloroethylene (TCE) was detected above its residential screening
level in three of the soil gas samples, no TCE was detected in any of the four indoor or ambient
background air samples at a laboratory limit of detection (LOD) of 0.053 ug/m3 (7.9 times lower
than the residential screening level of 0.42 ug/m3).
The highest concentrations of each detected analyte were also modeled using the NCDEQ Risk
Calculator for the indoor air and soil gas to indoor air pathways. The cumulative risk for each was
found to be negligible/acceptable, except for the residential indoor air Hazard Index in the soil
gas (due to TCE presence). However, the lack of detectable TCE in the indoor air samples in a
building with multiple open trenches (VI pathways) in the Main Laundry area implies that:
• TCE presence under the building is limited, and confined to only a small area of impact
at the southeast quadrant of the Main Laundry area, and
• Based on the LOD for TCE in indoor air, the findings suggest that the building's concrete
slab is achieving an attenuation factor (AF) of 0.0006, which is at least 47 times lower
than the default residential soil gas to indoor air AF of 0.03 used by the risk calculator.

Additional Vapor Intrusion Sampling Report (Rev 0) June 23, 2022
National Linen Service Site (NCBP Project #24028-20-065) Page 2
Wilmington, North Carolina
Since the ratio of indoor air to sub -slab soil gas results was zero (i.e., no TCE was detected in the
indoor air samples), the results of this second VI assessment indicate, as did the initial assessment
in September 2020, that no further action is necessary for either residential or commercial use
per current NCBP guidelines.
If you should have any questions during your review, please feel free to contact me at (919-389-
7747) or John Gallagher with Aptus (919-522-7289) at your convenience.
Sincerely,
RDH ENVIRONMENTAL CONSULTING
A4;4, N
Robert D. Hill, P.E.
Principal Consultant
Enclosure
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RDH/�
Environmental Consulting
4012 Ridgekrrook Bluffs Dr. I Raleigh, NC 27603
[phone] 1 inf❑@rdhet.com
ADDITIONAL VAPOR INTRUSION SAMPLING REPORT (REV 0)
NATIONAL LINEN SERVICE SITE
1315 SOUTH STH AVENUE
WILMINGTON, NEW HANOVER COUNTY, NORTH CAROLINA
NCBP PROJECT NO. 24028-20-065
RDHEC PROJECT NO. 2124.00
CONTACT INFORMATION
Developer
Raleigh Restoration
Group, LLC
Jason queen
[phone]
[e-mail]
Project
Manager
NC Brownfields Program
Kathleen Markey
919 441 6537
[e-mail]
Prepared for:
Raleigh Restoration Group
207 Fayetteville Street
Suite 200
Raleigh, NC 27601
Prepared by:
RDH Environmental Consulting
4012 Ridgebrook Bluffs Drive
Raleigh, North Carolina 27603
[phone]
NC Firm Engineering License # F-1346
June 23, 2022
C' A � L 0r,�r .r

RD 4012 RidRaleig k Bluffs 03
Raleigh, NC 27603
[phone]
Environmental Consu inq [e-mail]
TABLE OF CONTENTS
1.0
EXECUTIVE SUMMARY.................................................................................................
1
2.0
INTRODUCTION............................................................................................................
2
3.0
SAMPLING SUMMARY..................................................................................................
3
4.0
SITE ACTIVITIES............................................................................................................
3
4.1 May 11, 2022...........................................................................................................
4
Placement of Indoor/Ambient Air Samples...........................................................................4
ChemicalSurvey....................................................................................................................4
4.2 May 12, 2022...........................................................................................................
5
Collection of Indoor/Ambient Air Samples............................................................................5
Temporary Sub -Slab Sampling Probes...................................................................................5
Sub -Slab Soil Gas Sampling....................................................................................................
5
Shut -In and Leak Check Tests................................................................................................
6
Sample Shipment and Analysis..............................................................................................
6
5.0
SUMMARY OF FINDINGS..............................................................................................
7
Sub -Slab Soil Gas...................................................................................................................
7
Ambient/Indoor Air...............................................................................................................
7
RiskAssessment Analysis......................................................................................................
7
Conclusions...........................................................................................................................
9
6.0
QUALITY ASSURANCE/QUALITY CONTROL (QA/QC).....................................................
9
7.0
INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT ............................................ 10
TABLES
Table 1 Property Summary
Table 2 Sampling Summary (VI Only)
Table 3 Vapor Intrusion Indoor Air Sampling Form (5/11/2022)
Table 4 Vapor Intrusion Soil Gas Sampling Form (5/12/2020)
Table 5 Comparison of Indoor Air Results to Residential and Non -Residential Screening Levels
(RIASLs & NRIASLs)
Table 6 Comparison of Soil Gas Results to Residential and Non -Residential Screening Levels
(RSGSLs & NRSGSLs)
FIGURES
Figure 1 Site Location Map
Figure 2 Proposed Development
Figure 3 Sample Location Map & VI Test Results
APPENDICES
Appendix A NCBP Indoor Air Building Survey and Sampling Form
Appendix B Lab Report and Chain of Custody Forms
Appendix C VI Risk Analysis — NCDEQ Risk Calculator Results

RD l
Environmental Consu inq
1.0 EXECUTIVE SUMMARY
4012 Ridgebrook Bluffs Dr.
Raleigh, NC 27603
[phone]
[e-mail]
RDH Environmental Consulting (RDHEC) performed additional vapor intrusion (VI) sampling
(indoor air and concurrent sub -slab soil gas testing) at the former National Linen Service site
located at 1315 South 51h Avenue in Wilmington, New Hanover County, North Carolina
(reference: NC Brownfields Program (NCBP) Project No: 24028-20-065). The work was requested
by the NCBP due to the presence of trichloroethylene (TCE) in soil gas samples in the Main
Laundry area during prior testing by RDHEC in September 2020.
Three (3) indoor air, one (1) ambient air, and 10 sub -slab soil gas samples were collected over a
two-day period on May 11 and 12, 2022, in accordance with the April 22, 2022, NCBP-approved
work plan. The samples were analyzed for a list of 20 site -specific chemicals of concern (i.e., the
detected soil gas analytes from the 2020 sampling').
The sub -slab soil gas sampling results indicated that Chloroform was the only compound to
exceed a Non -Residential Soil Gas Screening Level (NRSGSL). The location of the exceedance (SS-
5) was southeast of the TCE detection during the prior 2020 sampling. The presence of
Chloroform beneath the slab may be attributable to chlorinated municipal water, given site use
as a commercial laundry. The indoor air sampling results were reported as J-flagged estimated
concentrations of Chloroform ranging from 0.067 ug/m3 to 0.082 ug/m3, or only 13% to 15% of
the Non -Residential Indoor Air Screening Level (NRIASL) of 0.53 ug/m3. The outdoor ambient
sample similarly had a J-flagged estimated concentration of Chloroform of 0.071 ug/m3 (13% of
the NRIASL).
TCE was reported in sub -slab soil gas samples at concentrations ranging from nondetectable to a
maximum of 83 ug/m3 in sample SS-5 collected in the Main Laundry area, which is 47% of the
NRSGSL of 180 ug/m3. No TCE was detected in any indoor air samples.
Naphthalene was the only analyte in the indoor air samples detected at a concentration that
exceeded the NRIASL. The indoor levels of Naphthalene mirrored the concentration found in the
outdoor control sample and all were reported as J-flagged estimated concentrations. However,
no Naphthalene was detected in any of the sub -slab soil gas samples indicating the Naphthalene
in not attributable to VI sources.
The indoor air sampling results showed only low levels of up to 15 of the remaining site -specific
chemicals of concern. The concentrations of these ranged from 0% to 22% of the respective
NRIASLs (and they were essentially at the same levels as the outdoor air control sample).
1 24 compounds were detected during the 2020 sampling but four (4) of those analytes have since been delisted
from the current 2022 NCBP screening level tables —4-Ethyltoluene, Acetone, Ethanol, and Trichlorofluoromethane
(Freon 11).

Additional Vapor Intrusion Sampling Report (Rev 0)
National Linen Service Site (NCBP Project #24028-20-065)
Wilmington, North Carolina
June 23, 2022
Page 2
The two sub -slab soil gas sampling locations for further REC evaluation at the northwest and
southwest corners of the building resulted in only six negligible detections, ranging from 0% to
4% of the respective NRSGSLs. Hence, these RECs presented no VI concerns within the building.
To further evaluate VI risks from the sampling, the maximum concentrations of each detected
analyte were entered as exposure point concentrations in the NCDEQ Risk Calculator (January
2022 version). The indoor air sampling results showed negligible (acceptable) VI risks for both
residential and commercial end use of the building.
From a commercial endpoint basis (e.g., Non -Residential Worker Soil Gas to Indoor Air
pathway) the Risk Calculator also indicated only a negligible risk potential. However, for the
Residential Indoor Air pathway, while the target carcinogenic risk was acceptable, an
unacceptable hazard index greater than 1 was predicted. This was due to the elevated presence
of TCE in the soil gas at sample location SS-5 near the southeast corner of the Main Laundry
area.
Although the risk analysis predicted an unacceptable hazard index of 1.6 for residential indoor
air from TCE in soil gas, the actual indoor air sampling results showed no detections of TCE, with
a hazard index of only 0.13, based on the maximum detections of 15 other compounds. Since
the ratio of indoor air to sub -slab soil gas results was zero (i.e., no TCE was detected in the
indoor air samples), no further action is necessary for either residential or commercial use per
current NCBP guidelines.
In conclusion, multiple lines of evidence from this round of assessment, coupled with the
September 2020 sampling at the former National Linen Service site, show that the risk of VI is
negligible/acceptable for the planned commercial (non-residential) use of the building.
2.0 INTRODUCTION
The site is comprised of one parcel (1.87 acres) zoned for urban mixed -use redevelopment, which
is occupied by a vacant 43,000-square-foot building (a former industrial laundry) and paved
parking. A topographical site map is provided in Figure 1. Current plans are to repurpose the site
to commercial use as a music venue, brewery and restaurant. The proposed redevelopment plan
is provided in Figure 2.
The sampling was performed in accordance with the approved work plan (Revision 2) submitted
on April 22, 2022. The goal of the additional assessment was to further evaluate the indoor air
within the building. This was due to the presence of TCE in one soil gas sample in the Main
Laundry during the sub -slab soil gas sampling effort in September 2020. The scope of work also
included two additional soil gas sampling locations at the northwest and southwest corners of
the building (within the Ironing & Laundry Sorting area, and in the vicinity of the UST pit with
prior contaminated groundwater, respectively) to further evaluate identified RECs at the site.

Additional Vapor Intrusion Sampling Report (Rev 0)
National Linen Service Site (NCBP Project #24028-20-065)
Wilmington, North Carolina
June 23, 2022
Page 3
The sampling occurred over a 2-day period on May 11 and May 12, 2022. The indoor air sampling
and building inventory took place May 11, 2022. The soil gas probe installations and sampling
occurred the following day (on May 12t", immediately after collection of the indoor air samples).
Copies of the Table 1 Property Summary and the Table 2 Sampling Summary (VI Only) from the
work plan are included for your reference.
3.0 SAMPLING SUMMARY
The work involved with this assessment included:
• Site reconnaissance of building and surrounding property to photograph conditions and
complete the Indoor Air Building Survey and Sampling Form.
• Collection of four (4) 24-hour air samples using individually certified 6-L Summa canisters:
o Three (3) indoor air samples from within the National Linen building at locations
of Sept 2020 sub -slab exceedances greater than RSGSLs
o One (1) ambient air (control) sample obtained outside the building (upwind) and
within parcel R05413-040-002-000
0 24-hour flow regulators
o Total of four (4) EPA Method TO-15 SIM/Hi-Lo level lab analyses for site -specific
analyte list compounds
• Collection of 10 concurrent sub -slab soil gas samples from nine (9) locations using batch
certified 1-L Summa canisters:
o Three (3) sub -slab soil gas samples from within the building at same locations of
prior RSGSL exceedances in 2020
o Four (4) sub -slab soil gas samples in the vicinity of the prior RSGSL exceedance
for TCE in the Main Laundry area
o One (1) sub -slab soil gas sample within Ironing & Laundry Sorting area (at north
end of 5t" Avenue)
o One (1) sub -slab soil gas sample in the vicinity of the UST pit with contaminated
groundwater (at south end of 5t" Avenue)
0 10-minute flow regulators
o One (1) duplicate sample using a stainless -steel tee
o Total of 10 TO-15 standard lab analyses (site -specific analyte list)
Figure 3 summarizes the indoor air and soil gas sampling locations (including duplicate/control
samples), as well as building and parcel delineation.
4.0 SITE ACTIVITIES
The assessment activities detailed below were performed in general accordance with the VI
Guidance (NCDEQ DWM Vapor Intrusion Guidance dated March 2018 — Version 2) and the
approved work plan. The building was vacant at the time, so no occupant interference occurred

Additional Vapor Intrusion Sampling Report (Rev 0)
National Linen Service Site (NCBP Project #24028-20-065)
Wilmington, North Carolina
June 23, 2022
Page 4
during the testing. Also, there is no intact/operational heating, ventilation and air conditioning
(HVAC) system for the building.
4.1 May 11, 2022
Placement of Indoor/Ambient Air Samoles
Upon arrival to the site, the indoor air and ambient air (background/control) samples were
initiated at the locations noted on Figure 3. Each of the individually certified 6-L Summa canisters
were fitted with 24-hour flow regulators and tubing was attached to tripods so that the inlets
were at breathing zone height. Due to a 30% chance of rain overnight, the proposed location of
ambient sample A-4 was changed from the southeast open parking lot to beneath the building
awning at the exterior of the East Storage area (to protect the canister and collected sample).
This location change has been reflected on the attached drawing. The wind direction over the
sampling period was out of the NNEz, thus the sample was generally obtained upwind of the
building, per the work plan. Details of the air sampling are noted on the attached Table 3 — Vapor
Intrusion Indoor Air Sampling Form.
Chemical Survey
After the air samples were initiated, the NCBP Indoor Air Building Survey and Sampling Form
(Appendix A) was completed by performing a room -by -room walkthrough and photographing
current conditions. At the time of the previous testing (September 2020), the site had four tractor
trucks and three moving trailers parked at the northeast of the site outside the Ironing & Laundry
Sorting area, along with numerous stored items (culvert, piping, metal items, and debris) along
the northeast, east and southeast perimeter. During this sampling visit, however, nearly all those
items had been removed, leaving only a few reusable items (e.g., a stack of bricks, a section of
fencing, some window frames, and an awning roof) remaining outside the building.
Similarly, during 2020, the building interior contained various materials stored by a moving
company (wood panels, pallets, furniture, a piano, and cabinets), as well as multiple crates that
contained costumes, movie sets/materials, and furniture/furnishings that were warehoused at
the site by film production entities. During this visit, the entire building interior had been emptied
of those items. Except for some dilapidated ceiling tiles and miscellaneous trash/debris, no
potential indoor air contamination sources were identified. Photographs of the site on this date
are located online at this link (https://photos.app.goo.gl/YKzLDR7lKwiP5iGb7).
2 Based on meteorological data collected by the nearest personal weather station (Woodlawn - KNCWILM1231),
located less than 1 mile south of the site on Woodlawn Avenue.

Additional Vapor Intrusion Sampling Report (Rev 0) June 23, 2022
National Linen Service Site (NCBP Project #24028-20-065) Page 5
Wilmington, North Carolina
4.2 May 12, 2022
Collection of Indoor/Ambient Air Samples
RDHEC returned to the site the following day prior to the end of the 24-hour sampling period for
the indoor and ambient air samples. The gauges on each of the canisters were checked and found
to be nearing completion (approximately one hour remaining). While waiting, locations for the
sub -slab soil gas samples were identified per the work plan and sampling media was staged at
the probe sites.
The indoor air and ambient sample canisters were each stopped once the sample time had
reached 24 hours. The final pressure of each canister was -5 inches of mercury (-5" Hg) or greater.
Temporary Sub -Slab Sampling Probes
Once each of the air sample canisters had been collected and boxed, drilling and placement of
the temporary sub -slab probes (Vapor Pins) was begun. A portable generator provided power for
a hammer drill that was used to bore 5/8-inch holes in the concrete slab. Depths ranged from
11.5 to 15 inches beneath the slab surface. Vapor Pins fitted with silicone sleeves were secured
into each boring using a special tool and rubber hammer, then capped. The building has concrete
floor slabs throughout, ranging from 4 to 7 inches thick. Each of the probes were placed into the
concrete floor and compacted sands were found beneath each boring location. Details regarding
probe depth and slab thickness are provided on the Vapor Intrusion Soil Gas Sampling Form
(Table 4). The sample locations are shown to scale in Figure 3. By the time the last probe had
been installed, the first vapor pins had equilibrated for approximately 3 hours or more', thus
allowing collection of the soil gas samples to commence.
Sub -Slab Soil Gas Sampling
RDHEC collected 10 samples for soil gas analysis from nine (9) locations as outlined in the work
plan. Each of these were sub -slab soil gas samples (— 1-ft depths beneath the slab). Three of the
samples (SS-1, SS-6, and SS-7) were at locations where the only detections above screening levels
were obtained during the 2020 sampling. SS-6, where the prior TCE detection occurred, also
included a duplicate sample. Samples SS-2 through SS-5 were placed to surround the SS-6
location and evaluate the presence and/or migration of TCE. One sample was collected at the
northeast of the building along South 5t" Avenue within the Ironing & Laundry Sorting area (SS-
8). The final sample (SS-9) was collected at the southeast of the building, near the former UST pit
that had contaminated groundwater.
The soil gas samples were collected using 1/4" Teflon tubing and batch certified 1-L Summa
canisters per the laboratory protocol using quick connect and Swagelok fittings. Small 1- to 2-
3 Greater than the 20-minute stabilization time required in the Assessment Checklist for minimally invasive points.

Additional Vapor Intrusion Sampling Report (Rev 0)
National Linen Service Site (NCBP Project #24028-20-065)
Wilmington, North Carolina
June 23, 2022
Page 6
inch pieces of 1/4" and 3/8" Tygon or silicone tubing were used to make connections to various
3-way valves and fittings of the sampling trains. The individual canisters were fitted with 150
ml/min flow regulators that resulted in sample times of approximately 7 minutes. The duplicate
sample was collected using a stainless -steel tee and a single flow regulator that resulted in an 8-
min sample time across the two canisters. New tubing and supplies were used for each sampling
train, canister connection, etc. The various sample locations and lab results for detected analytes
(from the current and prior assessments) are noted Figure 3.
Shut -In and Leak Check Tests
The probe tubing was connected to the sampling train and a shut-in test was performed to ensure
connections exhibit airtight conditions over a period of 2 to 3 minutes for each location. A shroud
was placed over each probe and sampling train. Helium was introduced into the shroud to a
concentration of —20% or greater and documented using a portable MGD-2002 helium monitor.
The probe tubing was then purged of a minimum of three dead volumes using a 60-ml syringe.
Each probe location was purged into a 0.5-L Tedlar bag, which was removed from the sampling
train and its contents monitored for helium levels using the monitor. Successful leak checks were
obtained from each location (i.e., the purged soil gas contained less than 5% of the initial shroud
concentration of helium).
Following the leak checks, the samples of soil gas were then collected into a 1-L stainless steel
Summa canister at each location (location SS-6 employed an inline tee to collect a duplicate
sample for quality assurance purposes).
Following completion of the sampling at each location, post -sampling leak checks were
performed using helium, as described earlier. No helium leaks were noted during the post -leak
tests. Afterward, the probe tubing and Vapor Pins were removed from each location and the
borings were grouted flush to the slab foundation level with cement.
Sample Shipment and Analysis
Each of the collected samples were couriered to a certified laboratory (Eurofins) under proper
chain of custody for analysis using EPA Compendium Method TO-15 "Determination of Volatile
Organic Compounds (VOCs) in Air Collected in Specially -Prepared Canisters and Analyzed by Gas
Chromatography/Mass Spectrometry (GC/MS)". A "Site Specific COCs - SLs — RLs" list was
included with the samples confirming that the laboratory reporting limits met the latest
Residential Indoor and Sub -Slab Soil Gas Screening Levels when 6-L and 1-L Summas are used4.
The analyses were as stated in Table 2 (from the Work Plan) for both the indoor air and sub -slab
4 The lab reporting limit (RL) for the air samples was higher than the extremely low screening level for Naphthalene.
Therefore, a request was made to report any detections with J-Flags to the minimum detection limit (MDL) on all
analyses.

Additional Vapor Intrusion Sampling Report (Rev 0)
National Linen Service Site (NCBP Project #24028-20-065)
Wilmington, North Carolina
June 23, 2022
Page 7
analytical methods requested. Photographs of the sampling tasks at the site on this date are
located online at this link (https:Hphotos.app.goo.gl/PHgugBgriLR4TBz59).
5.0 SUMMARY OF FINDINGS
Sub -Slab Soil Gas
Sub -slab location (SS-5) had the only detected analyte in the soil gas that exceeded the NRSGSL.
The contaminant was Chloroform at a concentration of 280 ug/m3, which was approximately five-
fold greater than the NRSGSL of 53 ug/m3. TCE was also detected in six sub -slab samples (five
locations) under the building — in the Main Laundry and SW Storage areas. But only three sample
locations within the Main Laundry area had levels above the residential soil gas screening level
(RSGSL) of 4.1 ug/m3. Concentrations of TCE were found to be well below the NRSGSL of 180
ug/m3 (8% to 47%)
The two additionally requested soil gas sampling locations at the northwest and southwest
corners of the building for further REC evaluation resulted in only six negligible detections,
ranging from 0% to 4% of the respective NRSGSLs.
Ambient/Indoor Air
The air sample findings detected only Naphthalene at a concentration equal to or above either
the Residential or Non -Residential Indoor Air Screening Levels (RIASL or NRIASL) of 0.083 and
0.36 ug/m3, respectively. The levels of Naphthalene in the three (3) indoor air samples and
ambient control sample were essentially the same, ranging from 0.36 to 0.39 ug/m3.
The level of Chloroform in the ambient air control sample was 13% of the NRIASL and 58% of the
RIASL. The indoor air sample concentrations of Chloroform were largely the same, ranging from
13% to 15% of the NRIASL and 55% to 67% of the RIASL.
Risk Assessment Analysis
To further evaluate VI risks from the sampling, the maximum concentrations of each detected
analyte were entered as exposure point concentrations in the NCDEQ Risk Calculator (January
2022 version). The indoor air sampling results showed negligible (acceptable) VI risks for both
residential and commercial end use of the building, as summarized below:

Additional Vapor Intrusion Sampling Report (Rev 0)
National Linen Service Site (NCBP Project #24028-20-065)
Wilmington, North Carolina
NCDEQ Risk Calculator — Indoor Air Pathway Resultss
June 23, 2022
Page 8
(Note - Naphthalene was not in this pathway evaluation since it was only present in ambient and indoor air due to
off -site sources and Naphthalene was not detected in any of the 10 soil gas samples collected beneath the
building.)
RDHEC also ran the Risk Calculator using the highest levels of detected analytes in the sub -slab
soil gas samples. It was found that from a commercial endpoint basis (e.g., Non -Residential
Worker Soil Gas to Indoor Air pathway) the Risk Calculator indicated only a negligible risk
potential, with cumulative carcinogenic risk and a non -carcinogenic hazard quotient of 5.6E-6
and 1.2E-01, respectively.
For the Residential Indoor Air pathway, the target carcinogenic risk was acceptable, however, the
hazard index exceeded 1.0. This was due to the elevated presence of TCE in the soil gas at sample
location SS-5 near the southeast corner of the Main Laundry area. The VI risk calculations from
the soil gas samples are tabulated below:
NCDEQ Risk Calculator — Soil Gas to Indoor Air Pathway Results
Although the risk analysis predicted an unacceptable hazard index of 1.6 for residential indoor
air from TCE in soil gas, the actual indoor air sampling results showed no detections of TCE and
the indoor air hazard index was only 0.13, based on the maximum detections of 15 other
compounds. This suggests that the impacted area beneath the slab is relatively limited, and/or
the concrete slab is providing at least 47-fold more effective VI attenuation than the default
attenuation factor (AF) used in the risk model6.
Printouts of the data input sheets and NCDEQ Risk Calculator results of the risk assessment are
provided in Appendix C.
S Acceptable risk is defined by the DWM VI Guidance as target carcinogenic risk levels ranging from 1E10-4 to
1E10-6 and a Hazard Index of less than 1
6 Given the limit of detection (LOD) was less than 0.053 ug/m3 for TCE in the indoor air analyses (no TCE was
detected), and the maximum TCE concentration in the soil gas samples was 83 ug/m3, the AF would be 0.0006. This
is 47 times (— 5 orders of magnitude) lower attenuation through the slab than calculated by the default residential
soil gas to indoor air AF of 0.03.

Additional Vapor Intrusion Sampling Report (Rev 0) June 23, 2022
National Linen Service Site (NCBP Project #24028-20-065) Page 9
Wilmington, North Carolina
Conclusions
Considering the above findings, below is a summary of additional conclusions from this VI
sampling effort:
• There was no Naphthalene detected in any of the soil gas samples. Therefore, the
presence of this contaminant in indoor and outdoor air is from urban/off-site sources
rather than VI.
• The presence of Chloroform in the soil gas was discounted as the result of decades of
municipal water supply use at the laundry (i.e., from chlorination rather than a VI
contaminant).
• The locations and concentrations of the TCE detections suggest a small area of impact
that is limited to the southeast quadrant of the Main Laundry area of the building
(sample locations SS-4, SS-5 and SS-6).
• The indoor air sampling from the three indoor air locations showed acceptable
Chloroform levels for both residential and non-residential use and no detections of TCE
in the indoor air within the building.
• Per the guidelines, since the ratio of indoor air to sub -slab soil gas results was zero (i.e.,
no TCE was detected in the indoor air samples), no further action is necessary for either
residential or commercial use.
• Since there are existing floor trenches and pathways in the Main Laundry area, the lack
of TCE indoors suggests that:
o there is minimal TCE beneath the footprint of the building, and
o the existing slab is mitigating and/or attenuating levels to those found in the
ambient air background sample.
o It is RDHEC's opinion that a combination of both these factors resulted in no TCE
in the indoor air.
o The existing trenches will be sealed once final upfits to the building are
completed.
o A commercial -grade HVAC system will be installed and operational following
renovations. This will provide greater air changes than residential systems,
further mitigating the risk of VI.
Multiple lines of evidence from this round of assessment, coupled with the September 2020
sampling at the former National Linen Service site, show that the risk of VI is negligible for the
planned commercial (non-residential) use of the building. Consequently, no further assessment
or mitigation are warranted per current NCBP guidelines.
6.0 QUALITY ASSURANCE/QUALITY CONTROL (QA/QC)
RDHEC followed the NCBP Checklist guidance for duplicate sample collection frequency of one
duplicate per 20 samples, per media, per method, per day. For the three indoor air samples, the
ambient background sample was used as a control sample (i.e., duplicate). For the nine (9) sub-

Additional Vapor Intrusion Sampling Report (Rev 0) June 23, 2022
National Linen Service Site (NCBP Project #24028-20-065) Page 10
Wilmington, North Carolina
slab soil gas sample locations, one duplicate was obtained at SS-6 in the Main Laundry area where
TCE was found to be above the RSGSL from the September 2020 sampling event.
During the shut-in test for the sampling train, the initial canister pressures were noted and
logged. None of the initial canister vacuum readings were less than -29 inches mercury. The air
sample canisters were stopped when the internal vacuum reached -5" Hg (or when sample time
had reached approximately 24 hours). The sub -slab canisters were each stopped at -5" Hg to
ensure that sufficient residual vacuum was retained during shipment to the laboratory and that
a time -weighted sampling period concentration could be documented. (Sample SS-4 was stopped
at -5 "Hg but when the gauge was tapped, it went to - 4" Hg.)
Dedicated sampling trains comprised of new tubing, fittings, and syringes were used for each
sample location. To prevent possible cross -contamination, no probe/sampling train materials
were re -used between sampling locations.
With canister sampling, there are minimal QA/QC requirements other than ensuring the valve is
securely closed and a Swagelok cap fitting is placed on the inlet port. The canisters were labeled
with the date, site information, sample identification number, initial and final vacuum readings
and sampling times, and the requested analyses. They were then placed into laboratory -supplied
shipment containers for shipment back to the laboratory for EPA Method TO-15 analyses. The
laboratory analytical request form was completed and enclosed with the canister shipment to
the laboratory for the above -specified analyses under standard chain -of -custody protocol.
Due to the extremely low screening levels involved with residential indoor air sampling (RIASLs),
RDHEC requested individually certified 6-L Summa canisters and the TO-15 Hi/Lo analysis, which
includes TO-15 SIM with TO-15 Low Level analysis to achieve the lowest reporting levels (RLs).
Depending on the residual vacuum, or if dilutions were necessary, should an analyte exceed the
target screening level, the lab was requested to J-flag the result to the minimum detection limit
(MDL) to get closer to required level of detection (see earlier discussion regarding Naphthalene
detections).
7.0 INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT
The borings from the sub -slab placement of the Vapor Pin probes with the hammer drill created
a small quantity of waste (concrete dust). This material was collected using a dust broom and
placed in a trash bag, then disposed in a trash can. No hazardous levels were encountered that
required containerizing or further waste characterization/disposal.

RDFr \1
Environmental Consulting
4012 Ridgebrook Bluffs Dr. I Raleigh, NC 27603
[phone] 1 [e-mail]
TABLES

TABLE 1 -PROPERTY SUMMARY
ADDITIONAL VAPOR INTRUSION SAMPLING WORK PLAN (REV 2)
NATIONAL LINEN SERVICE - WILMINGTON, NC
NCBP PROJECT NO. 24028-20-065
RDHEC PROJECT NO. 2124.00
BF Project No.
Parcel No.
Address
SiteAs..
Former/ Current Use
�&
RECs from 6/3/2019 ECS Phase
d Use
I Report:
-Two 10,000-gallon heating oil
Redevelopment plans not finalized but
Former laundry service facility
ASTs, with subterraneous
revised BPA dated May 28, 2021
24028-20-065
R05413-040-002-000
1315 South 5th Ave
1.9
(43,043 sq ft building)
piping
includes proposed redevelopment as
Wilmington, NC
Currently dormant/used for storage
Former drum storage area
office, parking, retail, warehousing,
Leaking 2,000-gallon industrial
commercial, and/or multi -family
alkaline cleaner AST
residential.
Leaking hydraulic lift
remnants, and
Leaking compressor

TABLE 2 -SAMPLING SUMMARY (VI ONLY)
ADDITIONAL VAPOR INTRUSION SAMPLING WORK PLAN (REV 2)
NATIONAL LINEN SERVICE - WILMINGTON, NC
NCBP PROJECT NO. 24028-20-065
V
RDHEC PROJECT NO. 2124.00
Number of
Detection
Data
ff"
Objective Type of Sample Depth
Samples
24-hour air
TO-15 Hi/Lo analysis - includes TO-15
applicable)
3 indoor air
samples using 6-L
SIM (individually certified canisters) with
0.1 ug/m3
Sept 2020 baseline testing (soil, GW, and
1 ambient air
Summa canisters NA
TO-15 Low Level to achieve lowest
RIASL for TCE _
sub -slab soil gas) identified TCE in soil gas at
(control) Collect at breathingzone
( )
reporting levels RLs If anal to exceeds
p g ( )� Y
0.42 u m3
g/
acceptable risk.
Evaluate indoor air
target SL, they can J-flag result to the
R05413-040-002-000
risk from TCE in soil 10-minute air
MDL to get closer to required level of
NCBP wants indoor air testing to further
gas samples using 1-L
detection.
assess risk. This Work Plan addresses indoor
air sampling (+ ambient control sample) plus
Summa canisters
concurrent sub -slab soil gas sampling (+ 1
100- to 200- g concurrent sub-
2.7 ug/m3
ml/min flow 12 inches
TO-15 Std RL analysis
RSGSL for TCE _
duplicate)
regulators slab soil gas
(sub -slab)
Batch certified canisters
14 ug/m3
1 duplicate

TABLE 3 - VAPOR INTRUSION AIR SAMPLING FORM (5/11/2022)
NATIONAL LINEN - WILMINGTON, NC
NCBP PROJECT NO. 24028-20-065
RDHEC PROJECT NO. 2124.00
Flow
Sample
Initial
Sample
Final
Canister ID
Controller
Start Time
Canister
End Time
Canister
Sample ID
(BC)
ID
Pressure
Pressure
(FC)
Date
Time
(" Hg)
Date
Time
(" Hg)
A-1
61-2435
23888
5/11/2022
1519
-30
5/12/2022
1520
-5.1
SW Storage
A-2
61-1291
21923
5/11/2022
1518
-28
5/12/2022
1525
-7
Main Laundry
A-3
6L0992
24468
5/11/2022
1516
-30
5/12/2022
1527
-7.5
SE Storage
A-4
6L0837
22217
5/11/2022
1520
-30
5/12/2022
1505
-5
Ambient (E Storage)

TABLE 4 - VAPOR INTRUSION SOIL GAS SAMPLING FORM (5/12/2020)
NATIONAL LINEN - WILMINGTON, NC
NCBP PROJECT NO. 24028-20-065
RDHEC PROJECT NO. 2124.00
Flow
Initial
Final
Slab
Probe
Pre -Hood
Pre -He
Leak Check
Sample
Sample
Post Hood
Post He
Leak Check
Sample
Canister ID
Controller
Shut -In
Canister
Canister
Date
Sample ID
Thickness
Fill
Depth
Init He
Purge
Pass?
Start Time
End Time
Init He
Purge
Pass?
ID
(BC)
ID
Test (" Hg)
Pressure
Pressure
(inches)
(inches)
N
(ppm)
(<10%)*
N
(ppm)
(<10%)*
Date
Time
Date
Time
(FC)
( H8)
( Hg)
SS-1
5/12/2022
5.75
White Sand
11.5
SS-1
11-1950
23394
-24.5
21.5
0
Yes
5/12/2022
2242
-30
5/12/2022
2249
-5
27.2
0
Yes
SW Storage
5/12/2022
SS-2
5.25
Lt Brown
14
SS-2
1L 2838
23309
-25
39.5
0
Yes
5/12/2022
2020
-29
5/12/2022
2028
-5
31.4
0
Yes
Main Laundry
Sand
5/12/2022
SS-3
5
Lt Brown
13
SS-3
11-3070
23730
-23
28.5
0
Yes
5/12/2022
2124
-30
5/12/2022
2131
-5
27.6
0
Yes
Main Laundry
Sand
5/12/2022
SS-4
4.75
Lt Brown
12
SS-4
11-1912
23310
-23.5
28.8
0
Yes
5/12/2022
2052
-29.5
5/12/2022
2100
-4
29.8
100
Yes
Main Laundry
Sand
5/12/2022
SS-5
5
Dk Brown
12
SS-5
11-1560
25270
-24
35.6
125
Yes
5/12/2022
1909
-30
5/12/2022
1916
-5
47.1
0
Yes
Main Laundry
Sand
SS-6
5/12/2022
SS-6
11-3154
24527
-21.5
Main Laundry
6.5
White Sand
15
31.9
125
Yes
5/12/2022
1947
-30
5/12/2022
1954
-5
26.7
0
Yes
SS-6 Dup
5/12/2022
SS-6 DUP
11-2272
24255
-22
Main Laundry
5/12/2022
SS-7
6
Dk Brown
13
SS-7
11-1939
23930
-23.5
50.5
0
Yes
5/12/2022
1813
-30
5/12/2022
1823
-5
48.9
0
Yes
SE Storage
Sand
5/12/2022
7
DSandy
14
SS-8
1L 3320
24549
-26.5
27.9
0
Yes
5/12/2022
2147
-30
5/12/2022
2153
-5
25.8
0
Yes
Ironing/SS-fling (NW)
5/12/2022
SS-9
4
LtGray14.5
SS-9
1L 3877
24691
-23
19.9
0
Yes
5/12/2022
2212
-29
5/12/2022
2219
-5
27.5
0
Yes
SW Storage
NOTES:
* NCDEQ Guidance considers a leak at 10% of hood helium concentration.
1% = 10,000 ppm
Leak % = purge concentration (ppm)
hood concentration (%) x 10,000 (ppm / %)

TABLE 5 - COMPARISON OF RESULTS TO RESIDENTIAL AND NON-RESIDENTIAL SCREENING LEVELS (RIASLs & NRIASLs)
VAPOR INTRUSION INDOOR AIR SAMPLING (5/12/2022)
FORMER NATIONAL LINEN - WILMINGTON, NC
NCBP PROJECT NO. 24028-20-065
RDHEC PROJECT NO. 2124.00
L liDr
1.42
RIL
3.5
Results
1.1
jLabF11ag
1
DetectedNon-
F
2-Propanol
67630
Residential
Indoor Air SL
(ug/m,)
4.2E+01
Residential
(ug/m,)
1.8E+02
1.42
0.7
0.2
1
1,3,5-Trimethylbenzene
108678
1.3E+01
5.3E+01
1.42
2.1
0.76
1
2-Butanone (Methyl Ethyl Ketone)
78933
1.0E+03
4.4E+03
1.42
2.5
0.32
1
Hexane
110543
1.5E+02
6.1E+02
1.42
0.7
0.74
1,2,4-Trimethylbenzene
95636
1.3E+01
5.3E+01
1.42
0.14
0.082
1
Chloroform
67663
1.2E-01
5.3E-01
Storage
1.42
0.23
0.33
Benzene
71432
3.6E-01
1.6E+00
A-1 (SW)
1.42
0.35
2.2
Freon 12
75718
2.1E+01
8.8E+01
1.42
0.19
0.029
1
Tetrachloroethene
127184
8.3E+00
3.5E+01
1.42
0.25
1.8
m,p-Xylene
108383/106423
2.1E+01
8.8E+01
1.42
0.12
0.4
Ethyl Benzene
100414
1.1E+00
4.9E+00
1.42
1.42
0.3
0.27
0.25
2
1
Toluene
91203
108883
8.3E-02 X
1.0E+03
3.6E-01
4.4E+03
1.42
0.12
0.5
o-Xylene
95476
2.1E+01
8.8E+01
1.39
3.4
2.1
1
2-Propanol
67630
4.2E+01
1.8E+02
1.39
0.68
0.16
1
1,3,5-Trimethylbenzene
108678
1.3E+01
5.3E+01
1.39
2
0.47
1
2-Butanone (Methyl Ethyl Ketone)
78933
1.0E+03
4.4E+03
1.39
0.5
0.51
1,4-Dioxane
123911
5.6E-01
2.5E+00
1.39
2.4
0.37
1
Hexane
110543
1.5E+02
6.1E+02
1.39
0.68
0.96
1,2,4-Trimethylbenzene
95636
1.3E+01
5.3E+01
1.39
0.14
0.08
1
Chloroform
67663
1.2E-01
5.3E-01
A-2 Main Laundry
1.39
0.22
0.33
Benzene
71432
3.6E-01
1.6E+00
1.39
0.34
2.3
Freon 12
75718
2.1E+01
8.8E+01
1.39
0.19
0.033
1
Tetrachloroethene
127184
8.3E+00
3.5E+01
1.39
0.24
2.2
m,p-Xylene
108383/106423
2.1E+01
8.8E+01
1.39
0.12
0.44
Ethyl Benzene
100414
1.1E+00
4.9E+00
1.39
0.36
0.24
1
Naphthalene
91203
8.3E-02 X
3.6E-01
1.39
0.26
2.2
Toluene
108883
1.0E+03
4.4E+03
1.39
0.12
0.58
o-Xylene
95476
2.1E+01
8.8E+01
1.48
3.6
2.8
1
2-Propanol
67630
4.2E+01
1.8E+02
1.48
0.73
0.17
1
1,3,5-Trimethylbenzene
108678
1.3E+01
5.3E+01
1.48
2.2
0.81
1
2-Butanone (Methyl Ethyl Ketone)
78933
1.0E+03
4.4E+03
1.48
2.6
0.27
1
Hexane
110543
1.5E+02
6.1E+02
1.48
0.73
0.85
1,2,4-Trimethylbenzene
95636
1.3E+01
5.3E+01
1.48
0.14
0.067
1
Chloroform
67663
1.2E-01
5.3E-01
A-3 Storage
1.48
0.24
0.34
Benzene
71432
3.6E-01
1.6E+00
(SE)
1.48
0.36
2.2
Freon 12
75718
2.1E+01
8.8E+01
1.48
0.2
0.025
1
Tetrachloroethene
127184
8.3E+00
3.5E+01
1.48
0.26
2.2
m,p-Xylene
108383/106423
2.1E+01
8.8E+01
1.48
0.13
0.49
Ethyl Benzene
100414
1.1E+00
4.9E+00
1.48
0.26
1
Naphthalene
91203
8.3E-02 X
3.6E-01
1.48
0.28
2.2
Toluene
108883
1.0E+03
4.4E+03
1.48
0.13
0.59
o-Xylene
95476
2.1E+01
8.8E+01
1.36
3.3
3.3
1
2-Propanol
67630
4.2E+01
1.8E+02
1.36
2
0.55
1
2-Butanone (Methyl Ethyl Ketone)
78933
1.0E+03
4.4E+03
1.36
2.4
0.27
1
Hexane
110543
1.5E+02
6.1E+02
1.36
0.67
0.71
1,2,4-Trimethylbenzene
95636
1.3E+01
5.3E+01
1.36
0.13
0.071
J
Chloroform
67663
1.2E-01
5.3E-01
1.36
0.22
0.29
Benzene
71432
3.6E-01
1.6E+00
A-4 Ambient (SE)
1.36
0.34
2.3
Freon 12
75718
2.1E+01
8.8E+01
1.36
0.18
0.027
1
Tetrachloroethene
127184
8.3E+00
3.5E+01
1.36
0.24
1.6
m,p-Xylene
108383/106423
2.1E+01
8.8E+01
1.36
0.12
0.34
Ethyl Benzene
100414
1.1E+00
4.9E+00
1.36
0.36
0.22
1
Naphthalene
91203
8.3E-02 X
3.6E-01
1.36
0.26
1.7
Toluene
108883
1.0E+03
4.4E+03
1.36
0.12
0.43
o-Xylene
95476
2.1E+01
8.8E+01
Notes: J flag lab qualifier = estimated value. Analyte was detected at or below reporting limit (RL) & reported to the minimum detection limit (MDL).
0.39 Shading denotes concentration exceeds the residential indoor air screening level (RIASL)
0.37 Shading denotes concentration exceeds the non-residential indoor air screening level (RIASL)
The lab RL for chloroform exceeded the RIASL at the required dilutions. (Informational note, since the sample concentrations were above the RL
for each detection.)

TABLE 6 - COMPARISON OF RESULTS TO RESIDENTIAL AND NON-RESIDENTIAL SCREENING LEVELS (RSGSLs & NRSGSLs)
VAPOR INTRUSION SOIL GAS SAMPLING (5/12/2022)
FORMER NATIONAL LINEN - WILMINGTON, NC
NCBP PROJECT NO. 24028-20-065
RDHEC PROJECT NO. 2124.00
Dilution
1.98
RL
4.8
Results
33
Lab Flag
Detected11V
Chloroform
67663
Residential
4.1E+00 X
Non -Residential
5.3E+01
SS-1
1.98
9.7
20
2-Propanol
67630
1.4E+03
1.8E+04
Storage
1.98
5.3
7.4
Trichloroethene
79016
1.4E+01
1.8E+02
(SW)
1.98
4.9
21
Freon 12
75718
7.0E+02
8.8E+03
1.98
6.7
29
Tetrachloroethene
127184
2.8E+02
3.5E+03
1.95
4.8
8.9
Chloroform
67663
4.1E+00 X
5.3E+01
1.95
9.6
17
2-Propanol
67630
1.4E+03
1.8E+04
55-2 Main
1.95
4.8
20
Freon 12
75718
7.0E+02
8.8E+03
Laundry
1.95
6.6
11
Tetrachloroethene
127184
2.8E+02
3.5E+03
1.95
4.2
6
m,p-Xylene
108383/106423
7.0E+02
8.8E+03
1.95
3.7
6.4
Toluene
108883
3.5E+04
4.4E+05
2.02
9.9
17
2-Propanol
67630
1.4E+03
1.8E+04
SS-3 Main
2.02
5.4
8.7
Trichloroethene
79016
1.4E+01
1.8E+02
Laundry
2.02
5
13
Freon 12
75718
7.0E+02
8.8E+03
2.02
6.8
18
Tetrachloroethene
127184
2.8E+02
3.5E+03
1.82
4.4
13
Chloroform
67663
4.1E+00 X
5.3E+01
1.82
8.9
33
2-Propanol
67630
1.4E+03
1.8E+04
SS-4 Main
1.82
4.9
15
Trichloroethene
79016
1.4E+01 X
1.8E+02
Laundry
1.82
4.5
33
Freon 12
75718
7.0E+02
8.8E+03
1.82
4
3.9
J
m,p-Xylene
108383/106423
7.0E+02
8.8E+03
1.82
3.4
4.2
Toluene
108883
3.5E+04
4.4E+05
1.98
4.8
280
Chloroform
67663
4.1E+00 X
5.3E+01
1.98
9.7
19
2-Propanol
67630
1.4E+03
1.8E+04
1.98
5.3
83
Trichloroethene
79016
1.4E+01 X
1.8E+02
SS-5 Main
1.98
4.9
36
Freon 12
75718
7.0E+02
8.8E+03
Laundry
1.98
6.7
7
Tetrachloroethene
127184
2.8E+02
3.5E+03
1.98
4.3
5
m,p-Xylene
108383/106423
7.0E+02
8.8E+03
1.98
3.5
5.9
Hexane
110543
4.9E+03
6.1E+04
1.98
3.7
6.4
Toluene
108883
3.5E+04
4.4E+05
2.1
5.1
26
Chloroform
67663
4.1E+00 X
5.3E+01
2.1
10
30
2-Propanol
67630
1.4E+03
1.8E+04
SS-6 Main
2.1
5.6
14
Trichloroethene
79016
1.4E+01 X
1.8E+02
2.1
5.2
15
Freon 12
75718
7.0E+02
8.8E+03
Laundry
2.1
7.1
12
Tetrachloroethene
127184
2.8E+02
3.5E+03
2.1
12
22
2-Butanone (Methyl Ethyl Ketone)
78933
3.5E+04
4.4E+05
2.1
4
5.6
Toluene
108883
3.5E+04
4.4E+05
2.09
5.1
25
Chloroform
67663
4.1E+00 X
5.3E+01
2.09
10
26
2-Propanol
67630
1.4E+03
1.8E+04
SS-6 Dup
2.09
5.6
15
Trichloroethene
79016
1.4E+01 X
1.8E+02
Main
2.09
5.2
16
Freon 12
75718
7.0E+02
8.8E+03
Laundry
2.09
7.1
51
Tetrachloroethene
127184
2.8E+02
3.5E+03
2.09
12
22
2-Butanone (Methyl Ethyl Ketone)
78933
3.5E+04
4.4E+05
2.09
3.9
5.8
Toluene
108883
3.5E+04
4.4E+05
1.93
9.5
33
2-Propanol
67630
1.4E+03
1.8E+04
SS-7
1.93
4.8
550
Freon 12
75718
7.0E+02
8.8E+03
Storage
1.93
4
4.4
4-Methyl-2-pentanone
108101
2.1E+04
2.6E+05
(SE)
1.93
4.2
5.2
m,p-Xylene
108383/106423
7.0E+02
8.8E+03
1.93
3.6
6.7
Toluene
108883
3.5E+04
4.4E+05
SS-8
Ironing/
Sorting
(NW)
1.98
9.7
26
2-Propanol
67630
1.4E+03
1.8E+04
2.01
9.9
160
2-Propanol
67630
1.4E+03
1.8E+04
SS-9
2.01
4.9
7.7
1,3,5-Trimethylbenzene
108678
4.2E+02
5.3E+03
Storage
2.01
4.1
7.6
4-Methyl-2-pentanone
108101
2.1E+04
2.6E+05
2.01
6.8
140
Tetrachloroethene
127184
2.8E+02
3.5E+03
(SW)
2.01
12
36
2-Butanone (Methyl Ethyl Ketone)
78933
3.5E+04
4.4E+05
2.01
4.9
16
1,2,4-Trimethyl benzene
95636
4.2E+02
5.3E+03
Notes: J flag lab qualifier = estimated value. Analyte was detected at or below concentration below reporting limit (RL).
33 Shading denotes concentration exceeds the residential soil gas screening level (RSGSL)
280 Shading denotes concentration exceeds the non-residential soil gas screening level (RSGSL)
The lab RL for chloroform exceeded the RSGSL at the required dilutions. (however, the sample concentrations were each above the RSGSL
for those detected concentrations.)

RDFr \1
Environmental Consulting
4012 Ridgebrook Bluffs Dr. I Raleigh, NC 27603
[phone] 1 [e-mail]
FIGURES

DRAWN
BY:
DATE: J U N 2022
TOPOGRAPHICAL SITE MAP
DRAFTING CHECK F� r,+.
C�
JOB N0: 2124.00
RD F��y
FORMER NATIONAL LINEN SERVICE FACILITY
1315 SOUTH 5TH AVENUE
BY
BYGINEER CHECK
CAD # 22124-00-01
Environmental Consulting
WILMINGTON, NEW HANOVER COUNTY, NC 28401
4012 Ridgehrook Bluffs Dr. I Raleigh, NC 27603
NCBP PROJECT NO: 24028-20-065
APPROVED
(919)389-77471 [e-mail]
BY:
DWG NO: FIGURE 1
REFERENCE: IMAGERY SOURCE - USGS 7.5 Minute Wilmington NC Quadrangle 2019, 5-Foot Contours, North American Datum of 1983 (NAD83), World Geodetic System 1984 (WGS84)

4 M
INDICATED PARCEL DENOTES BROWNFIELDS PROPERTY BOUNDARY d Va
N
N
O
O
O
N
N
O
1
o
O
N
W
U
l - �!
rTHE CURRENT PRIMARY REDEVELOPMENT PLAN BY THE RALEIGH , t* i
RESTORATION GROUP IS TO REPURPOSE THE EXISTING BUILDING
N
O
AS BREWERY AND RETAIL FOOD HALL. � i
i
W
z
U
HIS PROJECT IS MODELED ON THE SUCCESSFUL REPURPOSING OF
HE STONE'S WAREHOUSE BROWNFIELDS PROPERTY (BPN 20044-16-�
092) IN DOWNTOWN RALEIGH, NC.
0
0
0
_
L
i
��i."'
U
W
U
Y
W
U
ch
Ld
—
1 f w
•• � � � �
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Q..
0}
c�m
W
C�..
Z}
WO]
�
d..
W}
QO]
-000
PARCEL R05413 040 002 ; i
1315 S 5TH STREET r
o
N
I �
Q z o
w
1
z w w CD
Lj U Z> N
` 7 _ 1
17
w Z N
Q W >
o
FORMER NATIONAL LINEN -
SERVICE FACILITY -
O
J z = ~
o
(42,949 GSF) '
1315 S 5TH STREET * *
` PLANNED FOR REUSE AS
0 o w o
0 z �, z a_
� CD z
BREWERY & RETAIL FOOD —
HALL
Am-
o
v
i _
i 1
T
J �
2 p
C d
o
Z
ITF
d L
ac
LU
W
1 (APPROXIMATE)
0 OIMATE) 100
* 1 N
"
a
,y
Z
Ld
SCALE: 1 = 100 FT
1
LLJ
fl�
W
LL-
W

915 SANBORN FIRE INSURANCE MAP & 1949 AERIAL PHOTOGRAPHY SHOW SITE WOODED/UNDEVELOPED LAND.
003 INTERVIEW OF FORMER FACILITY PERSONNEL STATE PHASE I CONSTRUCTION BEGAN IN 1950.
951 SANBORN FIRE INSURANCE MAP INDICATES SITE TO BE LAUNDRY & DRYCLEANING FACILITY.
UBSEQUENT SANBORN MAPS (1953, 1955, 1967, 1973) INDICATE LAUNDRY FACILITY ONLY.
1/1990 50-GAL #5 FUEL OIL SPILL IMPACTED SOIL/STORMWATER
2/1990 10,000-GAL #5 FUEL OIL UST FAILED TIGHTNESS TEST, DRAINED TO LOWER LEVEL TO AVOID LEAKAGE
/1991 SOIL TESTING REPORT SHOWED TPH > ACTION LEVELS, SITE SENSITIVITY EVALUATION (SSE)
/1991 NCDEHNR ADVISED SSE LOW ENOUGH, CAN CLOSE/FILL UST WITH SAND
1/1993 NCDEHNR ISSUES NOTICE OF INTENT TO REMOVE/CLOSE IN -PLACE 2 OTHER LISTS:
- 6,000 GAL GASOLINE UST J-NZ
- 10,000 GAL #5 FUEL OIL UST
b6 9L
2/1993 UST CLEAN CLOSURE DOCUMENTED IN REPORT (77.36 TONS SOIL DISPOSED)
A-1 I I 1 1 0.25
A 2 Naphthalene 8.3E-02 3.6E-01 0.24 •
A-3 0.26
A-4 0.22
do
..yk + a
PARCEL R05413-040-002-000
1315 S 5TH STREET
1,97 oCRES
SS-1
SS-2
Chloroform
Chloroform
4.1E+00
4.1E+00
5.3E+01
5.3E+01
33 }
8.9'
Chloroform
4.1E+00
5.3E+01
13.
SS-4
Trichloroethene
Chloroform
1.4E+01
4.1E+00
1.8E+02
5.3E+01
15
280
SS-5
,
Trichloroethene
Chloroform
1.4E+01
4.1E+00
1.8E+02
5.3E+01
83
26
`
LilaTrichloroethene
SS-6
Chloroform
1.4E+01
4.1E+00
1.8E+02
5.3E+01
14
25
SS-6 Dup
Trichloroethene
1.4E+01
1.8E+02
15
0.25
Level exceeds the
Level exceeds the
residential screening level
non-residential screening level
I,
280
SS-9
UST PIT WITH
16
CONTAMIINATED
GROUNDWATER
LEGEND Chloroform
SS-1 SUB -SLAB SOIL GAS DUPLICATE/CONTROL
SAMPLE LOCATION SAMPLE LOCATION -.
♦ INDOOR/AMBIENT AIR �lA-�
PARCELID IA-1 SAMPLE LOCATION Pp5,3°°"r
pP��E NUMBER
PARCEL
BOUNDARY
2 EXISTING 10,000 GAL FUEL OIL ASTS
& CLOSED -IN -PLACE UST LOCATION
4.1 50 '
'F
V
PROPOSED SUBSLAB AND INDOOR AIR SAMPLE LOCATIONS
WITHIN BUILDING ARE BASED ON 9/2020 SAMPLING (THE
ONLY LOCATIONS WITH DETECTIONS WITH SUB -SLAB
DETECTIONS ABOVE RSGSLs). INTENT IS TO DETERMINE
TCE EXTENT.
CHLOROFORM & FREON 12 NOT SUSPECTED SITE COCS
(PROBABLE LAB ARTIFACTS).
Chloroform 4.1 130
Trichloroethvlene 14 47
AT-
Dichlorodifluoromethane
(Freon 12) 700
- t
(APPROXIMATE)
0 35 70
SCALE: 1 " = 70 FT
1200
N
N
O
V)
P7
N
O
O
O
1
W
N
O
Z
N
I
N
N
O
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Z
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Z
CD
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w U U cc
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u~ LJ o
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� z z I
_ > w 00
> � Q o
cn = N
z � �
a- w Ln w
Q z O
� Z � 0 z
zo Q o =
z 3:
Of
<2Lnw0
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LLJ
ch� z
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in
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RDW;xq-L
Environmental Consulting
4012 Ridgebrook Bluffs Dr. I Raleigh, NC 27603
[phone] 1 [e-mail]
APPENDIX A
NCBP INDOOR AIR BUILDING SURVEY AND SAMPLING FORM

INDOOR AIR BUILDING SURVEY
and SAMPLING FORM
,f r
Site Flame: 4 K CA �✓t � � �7r-�
Preparer's name:
Preparer's affiliation:
Part I - occupants
ID#: z`f e;,Zr r �d
Date: 5Y�� 2-�—
Phone #: d 1q) 7 7q I
Building Address: r, [.t { VK r pj
Property Contact: 4 e,, q5PRenter 1 other:
Contact's Phone; home { } work { } cell
#= of Building occupants: Children under age 13 r-,,�—
Part II — Building Characteristics
Children age 13-18 N'` Adults -
VACAC,�+-
Building type: residential 1 multi -family residential 1 office 1 strip mall 1 rner 1 1 industrial
Describe building: Vm t5 . �v.1 Year constructed: 5
Sensitive population: day care 1 nursing home/ hospital/ school/ other (specify): Plor
Number of floors below grade: 4!7�)_ (frill basement 1 crawl space 1 o grade
Number of floors at or above grade: {
Depth of basement below grade surface: � ft. Basement size: ft'- r A "
Basement floor construction: concrete 1 dirt 1 floating 1 stone 1 other (specify):
Foundation walls: poured concrete 1 ender bloc 1 stone 1 other (specify)
Basement sump present? Yes 1 No Sump pu np? Yes 1 No Water in sump?
Type of heating system (circle all that apply):
hot air circulation hot air radiation wood
heat pump hot water radiati i] kerosene heater
other (specify):
Yes I No c1° sr�l a .•�i-rr
1K
steam radiation
electric baseboard
Type of ventilation system (circle all that apply):
central air conditioning mechanical fans bathroom ventilation fans
individual air conditionl'ng units kitchen range hood fan outside air intake
other (specify):
Type of fuel utilized (circle all that apply): �r_l 01�t* t
Natural gas 1 electric 1 fuel oil 1 wood 1 coal 1 solar 1 kerosene6
Are the basement walls or floor sealed with waterproof paint or epoxy coatings? Yes 1 No f L4l

q4
Is there a whole house fan? Yes 1 6)
Septic system? Yes 1 Yes (but not used) 1 MQV0 C
Irrigation/private well? Yes 1 Yes (but not used) I fivo ` t
Type of ground cover outside of building: ass 1 ceiie 1 zey other (specify)
Existing subsurface depressurization (radon) system in place? Yes I
Sub -slab vapor/moisture barrier in place?
Type of barrier:
Part III - Outside Contaminant Sources
Yes IeD
Other stationary sources nearby (gas stations, emission stacks, etc.):
IA/4
s'['--3 -r�
".4 fe.rl-
active 1 passive
Heavy vehicular traffic nearby (or other mobile sources): VCAr ] r Lt li- ��' (-4 L
Part IV — Indoor Contaminant Sources
Identify all potential indoor sources found in the building (including attached garages) and crawlspace (if
present), the location of the source (floor and room), and whether the item was removed from the building
48 hours prior to indoor air sampling event. Any ventilation implemented after removal of the items
should be completed at least 24 hours prior to the commencement of the indoor air sampling event.
Potential Sources
Location(s)
Removed
(Yes 1 No I NA)
Gasoline: storage cans
Gas -powered equipment
Kerosene storage cans
Paints / thinners 1 strippers
�—
Cleaning solvents
�-
Oven cleaners
Carpet 1 upholstery cleaners
Other house cleaning products
0
Moth balls
�-
Polishes 1 waxes
Insecticides
FLmiture 1 floor polish
Nail polish 1 polish remover
/.
Hairspray
Cologne 1 perfume
Air fresheners
Fuel tank (inside building)
-
NA
Wood stove or fireplace
NA
New furniture 1 upholstery
New carpeting/ flooring
r
NA
Hobbies - glues, paints, etc.

3i&�
Part V — Miscellaneous Items
Do any occupants of the building s3noke? Yes I No How often?
NA -
Last time someone smoked in the building? hours I days ago ISµ k4uWa -1/
Does the building have an attached garage directly connected to living space? Yew-fco CK&l
If so, is a car usually parked in the garage? Yes 16)
a IfC Itt�L
Are gas -powered equipment or cans of gasolinelfiiels stored in the garage? Yes No
Do the occupants of the building have their clothes dry cleaned?
If yes, how often? weekly 1 monthly 13-4 times a year
Do any of the occupants use solvents in work? Yes 1 No
If yes, what types of solvents are used?
If yes, are their clothes washed at work? Yes 1 No
Yes 1 No f `+ A
Have any pesticideAerbicides been applied around the building or in the yard?
If so, when and which chemicals?
Has there ever been a fire in the building? Fes I (g) If yes, wheal?
r
Has painting or staining been done in the building in the last 6 months?
If yes, when
Part VI — Samnlina Information
and where?
Yes 1No
U" �L� .-
Yes
Sample Technician: 41 I —14MCC Phone number: { ��� } 3$ - 7741
Sample Source =ndoorr Crawlspace Air 1 ub-Slab Near Slab Soil Gas 1 Exterior Soil Gas
Sampler Type: Tedlar bag 1 Sorbent 1 tainless Steel Caniste 1 Other (specify):
Analytical Meth . TO-15 TO-17 1 other:
� t
Sample locations (Haar, room}_tL f"} s
Field ID # q$r �'t� 04` Field I #
J *fA
Field ID # � -! �4—� -16 { 14;57 Field ID #
Were "Instructions for Occupants" followed?
If not, describe modifications:
� r
Cert. Laboratory:y r LAI'
-TA— 47 le �
Yes 1 No

Provide Draining ofSample Location(s) in Building
�t:c AAA -
Part VII -MeteorologitJci-�rf«tcal Conditions P 41
Was there significant precipitation within 12 hours prior to (or during) the sampling event? Yes
Describe the general weather conditions: C(�"jW)C
Q'
Part VIII — General Observations
Provide any information that may be pertinent to the sampling event and may assist in the data
interpretation process (e.g., observed that drycleaner operated with door or windows propped open for
ventilation).
V •t trt — vO 7 f u wl �d rC !�
(Adapted from the Nf DEP Vapor Intrusion Guidance, October 2005)

RDW;xq-L
Environmental Consulting
4012 Ridgebrook Bluffs Dr. I Raleigh, NC 27603
[phone] 1 [e-mail]
APPENDIX B
LAB REPORT AND CHAIN OF CUSTODY FORMS

DR AIR SAMPLE ANALYSES
urofins
Environment Testing
America
ANALYTICAL REPORT
Eurofins Savannah
5102 LaRoche Avenue
Savannah, GA 31404
Tel: [phone]
Laboratory Job ID- 680-215835-2
Client Project/Site: Aptus - National Linen (Wilmington)
For:
RDH Environmental Consulting
4012 Ridgebrook Bluffs Drive
Raleigh, North Carolina 27603
Attn: Robert D Hill
Authorized for release by.
512412022 1:34:20 PM
John Andros, Project Manager 1
[phone]
[e-mail]
The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI
requirements for accredited parameters, exceptions are noted in this report. This
report may not be reproduced except in full, and with written approval from the
laboratory. For questions please contact the Project Manager at the e-mail address or
telephone number listed on this page.
This report has been electronically signed and authorized by the signatory. Electronic
signature is intended to be the legally binding equivalent of a traditionally handwritten
signature.
Results relate only to the items tested and the sample(s) as received by the laboratory.

INDOOR AIR SAMPLE ANALYSES
Definitions/Glossary
Client: RDH Environmental Consulting
Project/Site: Aptus - National Linen (Wilmington)
Glossary
Abbreviation These commonly used abbreviations may or may not be present in this report.
tt Listed under the "D" column to designate that the result is reported on a dry weight basis
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level'
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRIES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Job ID: 680-215835-2
Eurofins Savannah
Page 2 of 26 5/24/2022

INDOOR AIR SAMPLE ANALYSES
Sample Summary
Client: RDH Environmental Consulting
Project/Site: Aptus - National Linen (Wilmington)
Lab Sample ID
Client Sample ID
Matrix
680-215835-1
A-1 Storage (SW)
Air
680-215835-2
A-2 Main Laundry
Air
680-215835-3
A-3 Storage (SE)
Air
680-215835-4
A-4 Ambient (SE)
Air
Collected Received
05/12/22 15:20
05/17/22 09:42
05/12/22 15:25
05/17/22 09:42
05/12/22 15:27
05/17/22 09:42
05/12/22 15:05
05/17/22 09:42
Job ID: 680-215835-2
Page 3 of 26
Eurofins Savannah
5/24/2022

INDOOR AIR SAMPLE ANALYSES
Case Narrative C
Client: RDH Environmental Consulting Job ID: 680-215835-2
Project/Site: Aptus - National Linen (Wilmington)
Job ID: 680-215835-2
Laboratory: Eurofins Savannah
Narrative
Job Narrative
680-215835-2
Comments
No additional comments.
Receipt
The samples were received on 5/17/2022 9:42 AM. Unless otherwise noted below, the samples arrived in good condition, and where
required, properly preserved and on ice.
No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.
Eurofins Savannah
Page 4 of 26 5/24/2022

INDOOR AIR SAMPLE ANALYSES
Method Summary
Client: RDH Environmental Consulting Job ID: 680-215835-2
Project/Site: Aptus - National Linen (Wilmington)
Method Method Description Protocol Laboratory
Subcontract General Subcontract Method None Eurofins
Protocol References:
None = None
Laboratory References:
Eurofins = Eurofins Air Toxics, 180 Blue Ravine Road, Suite B, Folsom, CA 95630
Eurofins Savannah
Page 5 of 26 5/24/2022

INDOOR AIR SAMPLE ANALYSES
tiff eurof ins C
Air Toxics
5/24/2022
Mr. John Andros
Eurofins Test America C
5102 LaRoche
Savannah GA 31404 •
Project Name: Aptus - National Linen Additional Sampli
Project #:
Workorder #: 2205433A
Dear Mr. John Andros
The following report includes the data for the above referenced project for sample(s)
received on 5/17/2022 at Eurofins Air Toxics LLC.
The data and associated QC analyzed by Modified 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
EuWiris Air Toxics, LLC
180 Blue Ravine Road, Suite B
Folsom, CA 95630
T 916-985.1000
F 916-351-8279
www, a i rtox ics.cam
Page 1 of 20
Page 6 of 26 5/24/2022

%% eurofins
INDOOR AIR SAMPLE ANALYSES
CLIENT:
PHONE:
FAX:
DATE RECEIVED:
DATE COMPLETED:
Air Toxics
WORK ORDER #: 2205433A
Work Order Summary
Mr. John Andros BILL TO:
Eurofins Environment Testing
5102 LaRoche
Savannah, GA 31404
Accounts Payable
Eurofins Environment Testing
4104 Shuffel St NW
North Canton, OH 44720
912-354-7858 P.O.# 2124.00
PROJECT # Aptus - National Linen Additional Sampli
05/17/2022 CONTACT: Brian Whittaker
05/24/2022
RECEIPT
FINAL
FRACTION #
NAME
TEST
VAC./PRES.
PRESSURE
01A
A-1 Storage (SW)
Modified TO-15
6.0 "Hg
2 psi
01B
A-1 Storage (SW)
Modified TO-15
6.0 "Hg
2 psi
02A
A-2 Main Laundry
Modified TO-15
5.5 "Hg
2 psi
02B
A-2 Main Laundry
Modified TO-15
5.5 "Hg
2 psi
03A
A-3 Storage (SE)
Modified TO-15
7.0 "Hg
2 psi
03B
A-3 Storage (SE)
Modified TO-15
7.0 "Hg
2 psi
04A
A-4 Ambient (SE)
Modified TO-15
5.0 "Hg
2 psi
04B
A-4 Ambient (SE)
Modified TO-15
5.0 "Hg
2 psi
05A
Lab Blank
Modified TO-15
NA
NA
05B
Lab Blank
Modified TO-15
NA
NA
06A
CCV
Modified TO-15
NA
NA
06B
CCV
Modified TO-15
NA
NA
07A
LCS
Modified TO-15
NA
NA
07AA
LCSD
Modified TO-15
NA
NA
07B
LCS
Modified TO-15
NA
NA
07BB
LCSD
Modified TO-15
NA
NA
CERTIFIED BY:
Technical Director
DATE: OS/24/22
Certification numbers: AZ Licensure AZ0775, FL NELAP — E87680, LA NELAP — 02089, NH NELAP - 209221, NJ NELAP - CA016,
NY NELAP - 11291, TX NELAP - T104704434-21-17, UT NELAP — CA009332021-13, VA NELAP - 10615, WA NELAP - C935
Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program)
Accreditation number: CA300005-015, Effective date: 10/18/2021, Expiration date: 10/17/2022.
Eurofins Air Toxics, LLC certifies that the test results contained in this report meet all requirements of the NELAC standards
This report shall not be reproduced, except in full, without the written approval ofEurofins Air Toxics, LLC.
180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630
[phone] . [phone] . FAX [phone]
Page 2 of 20
Page 7 of 26 5/24/2022

%% eurofins
INDOOR AIR SAMPLE ANALYSES
Air Toxics
LABORATORY NARRATIVE
Modified TO-15 Full Scan/SIM
Eurofins Test America
Workorder# 2205433A
Four 6 Liter Summa Canister (100% SIM Ambient) samples were received on May 17, 2022. The
laboratory performed analysis via modified EPA Method TO-15 using GUMS in the Full Scan and
SIM acquisition modes. The method involves concentrating up to 1.0 liters of air. The concentrated
aliquot is then flash vaporized and swept through a water management system to remove water vapor.
Following dehumidification, the sample passes directly into the GUMS for analysis.
Method modifications taken to run these samples are summarized in the table below. Specific project
requirements may over -ride the EATL modifications.
Requirement
TO-15
ATL Modifications
ICAL %RSD acceptance criteria
</=30% RSD with 2
For Full Scan:
compounds allowed out
30% RSD with 4 compounds allowed out to < 40% RSD
to < 40% RSD
For SIM:
Project specific; default criteria is </=30% RSD with 10%
of compounds allowed out to < 40% RSD
Daily Calibration
+- 30% Difference
For Full Scan:
</= 30% Difference with four allowed out up to </=40%.;
flag and narrate outliers
For SIM:
Project specific; default criteria is </= 30% Difference
with 10% of compounds allowed out up to </=40%.; flag
and narrate outliers
Blank and standards
Zero air
Nitrogen
Method Detection Limit
Follow 40CFR Pt.136
The MDL met all relevant requirements in Method TO-15
App. B
(statistical MDL less than the LOQ). The concentration of
the spiked replicate may have exceeded 1 OX the
calculated MDL in some cases
Receiving Notes
There were no receiving discrepancies.
Analytical Notes
The results for each sample in this report were acquired from two separate data files originating from
the same analytical run. The two data files have the same base file name and are differentiated with a
"sim" extension on the SIM data file.
As per client project requirements, the laboratory has reported estimated values for target compound
hits that are below the Reporting Limit but greater than the Method Detection Limit. Concentrations
that are below the level at which the canister was certified may be false positives.
Due to limitations with the LIM system, Method Detection Limit values for non-standard compounds
may be included in the final report. Results for the non-standard compounds however were not
C
0
Page 3 of 20
Page 8 of 26 5/24/2022

INDOOR AIR SAMPLE ANALYSES
ti% eurofins C
I Air Toxics
evaluated below the reporting limit per project requirement.
Definition of Data Qualifying Flags
Nine 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.
UJ- Non -detected compound associated with low bias in the CCV
N - The identification is based on presumptive evidence.
CN - See case narrative explanation
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
rl-File was requantified for the purpose of reissue
Page 4 of 20
Page 9 of 26 5/24/2022

INDOOR AIR SAMPLE ANALYSES
v
cn
m
0
o_
N
0)
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-1 Storage (SW)
Lab ID: 2205433A-01A Date/Time Analyzed: 5/21/22 01:02 PM
Date/Time Collected: 5/12/22 03:20 PM Dilution Factor: 1.42
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052107
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
1,2,4-Trimethyl benzene
95-63-6
0.096
0.56
0.70
0.74
1,3,5-Trimethyl benzene
108-67-8
0.11
0.56
0.70
0.20 J
1,4-Dioxane
123-91-1
0.13
0.41
0.51
Not Detected
2-Butanone (Methyl Ethyl Ketone)
78-93-3
0.43
1.2
2.1
0.76 J
2-Propanol
67-63-0
0.19
1.0
3.5
1.1 J
4-Methyl-2-pentanone
108-10-1
0.13
0.46
0.58
Not Detected
Ethyl Acetate
141-78-6
0.57
D
2.6
Not Detected
Heptane
142-82-5
0.31
1.7
2.9
Not Detected
Hexane
110-54-3
0.21
1.5
2.5
0.32 J
Styrene
100-42-5
0.19
0.48
0.60
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
104
4-Bromofluorobenzene
460-00-4
70-130
94
Toluene-d8
2037-26-5
70-130
94
Page 5 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
0
N
rn
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-1 Storage (SW)
Lab ID: 2205433A-01B Date/Time Analyzed: 5/21/22 01:02 PM
Date/Time Collected: 5/12/22 03:20 PM Dilution Factor: 1.42
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052107sim
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
Benzene
71-43-2
0.028
0.032
0.23
0.33
Chloroform
67-66-3
0.013
0.048
0.14
0.082 J
Ethyl Benzene
100-41-4
0.016
0.043
0.12
0.40
Freon 12
75-71-8
0.029
0.049
0.35
2.2
m, p-Xylene
108-38-3
0.016
0.043
0.25
1.8
Naphthalene
91-20-3
0.097
0.22
0.37
0.25 J
o-Xylene
95-47-6
0.014
0.043
0.12
0.50
Tetrachloroethene
127-18-4
0.014
0.067
0.19
0.029 J
Toluene
108-88-3
0.022
0.037
0.27
2.0
Trichloroethene
79-01-6
0.030
0.053
0.15
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
105
4-Bromofluorobenzene
460-00-4
70-130
87
Toluene-d8
2037-26-5
70-130
102
Page 6 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
N
O_
N
0)
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-2 Main Laundry
Lab ID: 2205433A-02A Date/Time Analyzed: 5/21/22 01:41 PM
Date/Time Collected: 5/12/22 03:25 PM Dilution Factor: 1.39
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052108
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
1,2,4-Trimethyl benzene
95-63-6
0.094
0.55
0.68
0.96
1,3,5-Trimethyl benzene
108-67-8
0.11
0.55
0.68
0.16 J
1,4-Dioxane
123-91-1
0.13
0.40
0.50
0.51
2-Butanone (Methyl Ethyl Ketone)
78-93-3
0.42
1.2
2.0
0.47 J
2-Propanol
67-63-0
0.18
1.0
3.4
2.1 J
4-Methyl-2-pentanone
108-10-1
0.13
0.46
0.57
Not Detected
Ethyl Acetate
141-78-6
0.56
D
2.5
Not Detected
Heptane
142-82-5
0.30
1.7
2.8
Not Detected
Hexane
110-54-3
0.21
1.5
2.4
0.37 J
Styrene
100-42-5
0.19
0.47
0.59
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
101
4-Bromofluorobenzene
460-00-4
70-130
95
Toluene-d8
2037-26-5
70-130
96
Page 7 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
w
0
N
rn
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-2 Main Laundry
Lab ID: 2205433A-02B Date/Time Analyzed: 5/21/22 01:41 PM
Date/Time Collected: 5/12/22 03:25 PM Dilution Factor: 1.39
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052108sim
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
Benzene
71-43-2
0.028
0.031
0.22
0.33
Chloroform
67-66-3
0.012
0.048
0.14
0.080 J
Ethyl Benzene
100-41-4
0.015
0.042
0.12
0.44
Freon 12
75-71-8
0.028
0.048
0.34
2.3
m, p-Xylene
108-38-3
0.016
0.042
0.24
2.2
Naphthalene
91-20-3
0.095
0.22
0.36
0.24 J
o-Xylene
95-47-6
0.014
0.042
0.12
0.58
Tetrachloroethene
127-18-4
0.013
0.066
0.19
0.033 J
Toluene
108-88-3
0.022
0.037
0.26
2.2
Trichloroethene
79-01-6
0.030
0.052
0.15
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
106
4-Bromofluorobenzene
460-00-4
70-130
88
Toluene-d8
2037-26-5
70-130
101
Page 8 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
o_
N
0)
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-3 Storage (SE)
Lab ID: 2205433A-03A Date/Time Analyzed: 5/21/22 02:21 PM
Date/Time Collected: 5/12/22 03:27 PM Dilution Factor: 1.48
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052109
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
1,2,4-Trimethyl benzene
95-63-6
0.10
0.58
0.73
0.85
1,3,5-Trimethyl benzene
108-67-8
0.11
0.58
0.73
0.17 J
1,4-Dioxane
123-91-1
0.14
0.43
0.53
Not Detected
2-Butanone (Methyl Ethyl Ketone)
78-93-3
0.45
1.3
2.2
0.81 J
2-Propanol
67-63-0
0.20
1.1
3.6
2.8 J
4-Methyl-2-pentanone
108-10-1
0.14
0.48
0.61
Not Detected
Ethyl Acetate
141-78-6
0.59
D
2.7
Not Detected
Heptane
142-82-5
0.32
1.8
3.0
Not Detected
Hexane
110-54-3
0.22
1.6
2.6
0.27 J
Styrene
100-42-5
0.20
0.50
0.63
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
106
4-Bromofluorobenzene
460-00-4
70-130
86
Toluene-d8
2037-26-5
70-130
91
Page 9 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
cn
o_
N
rn
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-3 Storage (SE)
Lab ID: 2205433A-03B Date/Time Analyzed: 5/21/22 02:21 PM
Date/Time Collected: 5/12/22 03:27 PM Dilution Factor: 1.48
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052109sim
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
Benzene
71-43-2
0.030
0.033
0.24
0.34
Chloroform
67-66-3
0.013
0.050
0.14
0.067 J
Ethyl Benzene
100-41-4
0.016
0.045
0.13
0.49
Freon 12
75-71-8
0.030
0.051
0.36
2.2
m, p-Xylene
108-38-3
0.017
0.045
0.26
2.2
Naphthalene
91-20-3
0.10
0.23
0.39
0.26 J
o-Xylene
95-47-6
0.014
0.045
0.13
0.59
Tetrachloroethene
127-18-4
0.014
0.070
0.20
0.025 J
Toluene
108-88-3
0.023
0.039
0.28
2.2
Trichloroethene
79-01-6
0.031
0.056
0.16
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
104
4-Bromofluorobenzene
460-00-4
70-130
89
Toluene-d8
2037-26-5
70-130
102
Page 10 of 20

INDOOR AIR SAMPLE ANALYSES
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-4 Ambient (SE)
Lab ID: 2205433A-04A Date/Time Analyzed: 5/21/22 03:01 PM
Date/Time Collected: 5/12/22 03:05 PM Dilution Factor: 1.36
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052110
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
1,2,4-Trimethyl benzene
95-63-6
0.092
0.53
0.67
0.71
1,3,5-Trimethyl benzene
108-67-8
0.10
0.53
0.67
Not Detected
1,4-Dioxane
123-91-1
0.13
0.39
0.49
Not Detected
2-Butanone (Methyl Ethyl Ketone)
78-93-3
0.41
1.2
2.0
0.55 J
2-Propanol
67-63-0
0.18
1.0
3.3
3.3 J
4-Methyl-2-pentanone
108-10-1
0.13
0.44
0.56
Not Detected
Ethyl Acetate
141-78-6
0.54
D
2.4
Not Detected
Heptane
142-82-5
0.30
1.7
2.8
Not Detected
Hexane
110-54-3
0.20
1.4
2.4
0.27 J
Styrene
100-42-5
0.18
0.46
0.58
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
108
4-Bromofluorobenzene
460-00-4
70-130
89
Toluene-d8
2037-26-5
70-130
96
Page 11 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
o_
N
rn
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Taxics
Client ID: A-4 Ambient (SE)
Lab ID: 2205433A-04B Date/Time Analyzed: 5/21/22 03:01 PM
Date/Time Collected: 5/12/22 03:05 PM Dilution Factor: 1.36
Media: 6 Liter Summa Canister (100% SIM Ambier Instrument/Filename: msdv.i / v052110sim
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
Benzene
71-43-2
0.027
0.030
0.22
0.29
Chloroform
67-66-3
0.012
0.046
0.13
0.071 J
Ethyl Benzene
100-41-4
0.015
0.041
0.12
0.34
Freon 12
75-71-8
0.028
0.047
0.34
2.3
m, p-Xylene
108-38-3
0.016
0.041
0.24
1.6
Naphthalene
91-20-3
0.093
0.21
0.36
0.22 J
o-Xylene
95-47-6
0.013
0.041
0.12
0.43
Tetrachloroethene
127-18-4
0.013
0.064
0.18
0.027 J
Toluene
108-88-3
0.021
0.036
0.26
1.7
Trichloroethene
79-01-6
0.029
0.051
0.15
Not Detected
= Estimated value.
u: Hnaiyte not witnin the uou scope of accreaitation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
108
4-Bromofluorobenzene
460-00-4
70-130
89
Toluene-d8
2037-26-5
70-130
102
Page 12 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
00
0
N
0)
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Toxic
Client ID: Lab Blank
Lab ID: 2205433A-05A Date/Time Analyzed: 5/21/22 11:31 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052106a
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
1,2,4-Trimethyl benzene
95-63-6
0.068
0.39
0.49
Not Detected
1,3,5-Trimethyl benzene
108-67-8
0.077
0.39
0.49
Not Detected
1,4-Dioxane
123-91-1
0.093
0.29
0.36
Not Detected
2-Butanone (Methyl Ethyl Ketone)
78-93-3
0.30
0.88
1.5
Not Detected
2-Propanol
67-63-0
0.13
0.74
2.4
0.45 J
4-Methyl-2-pentanone
108-10-1
0.094
0.33
0.41
Not Detected
Ethyl Acetate
141-78-6
0.40
D
1.8
Not Detected
Heptane
142-82-5
0.22
1.2
2.0
Not Detected
Hexane
110-54-3
0.15
1.0
1.8
Not Detected
Styrene
100-42-5
0.14
0.34
0.42
Not Detected
Estimated value.
u: Hnaiyte not witnin the uou scope of accrewtation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
105
4-Bromofluorobenzene
460-00-4
70-130
90
Toluene-d8
2037-26-5
70-130
96
Page 13 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
0
N
rn
z
N
N
O
N
N
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN
Aptus - National Linen Additional Sampli
,;% eurof ins
Air Toxic
Client ID: Lab Blank
Lab ID: 2205433A-05B Date/Time Analyzed: 5/21/22 11:31 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052106simc
Compound
CAS#
MDL
(ug/m3)
LOD
(ug/m3)
Rpt. Limit
(ug/m3)
Amount
(ug/m3)
Benzene
71-43-2
0.020
0.022
0.16
Not Detected
Chloroform
67-66-3
0.0089
0.034
0.098
0.014 J
Ethyl Benzene
100-41-4
0.011
0.030
0.087
0.019 J
Freon 12
75-71-8
0.020
0.035
0.25
Not Detected
m,p-Xylene
108-38-3
0.012
0.030
0.17
0.017 J
Naphthalene
91-20-3
0.068
0.16
0.26
Not Detected
o-Xylene
95-47-6
0.0097
0.030
0.087
0.013 J
Tetrachloroethene
127-18-4
0.0097
0.047
0.14
0.028 J
Toluene
108-88-3
0.016
0.026
0.19
Not Detected
Trichloroethene
79-01-6
0.021
0.038
0.11
0.022 J
Estimated value.
u: Hnaiyte not witnin the uou scope of accrewtation
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
109
4-Bromofluorobenzene
460-00-4
70-130
86
Toluene-d8
2037-26-5
70-130
100
Page 14 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
N
0
o_
N
0)
z
N
N
O
N
N
eur�fins
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN I Air Toxics
Aptus - National Linen Additional Sampli
Client ID: CCV
Lab ID: 2205433A-06A Date/Time Analyzed: 5/21/22 08:52 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052102
Compound
CAS#
%Recovery
1,2,4-Trimethyl benzene
95-63-6
106
1,3,5-Trimethyl benzene
108-67-8
105
1,4-Dioxane
123-91-1
92
2-Butanone (Methyl Ethyl Ketone)
78-93-3
86
2-Propanol
67-63-0
79
4-Methyl-2-pentanone
108-10-1
91
Ethyl Acetate
141-78-6
82
Heptane
142-82-5
92
Hexane
110-54-3
80
Styrene
100-42-5
100
D: Analyte not within the DoD scope of accreditation.
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
101
4-Bromofluorobenzene
460-00-4
70-130
91
Toluene-d8
2037-26-5
70-130
98
Page 15 of 20

INDOOR AIR SAMPLE ANALYSES
v
m
N
o_
N
0)
z
N
N
O
N
N
eur�fins
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN I Air Toxics
Aptus - National Linen Additional Sampli
Client ID: CCV
Lab ID: 2205433A-06B Date/Time Analyzed: 5/21/22 08:52 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052102sim
Compound
CAS#
%Recovery
Benzene
71-43-2
94
Chloroform
67-66-3
90
Ethyl Benzene
100-41-4
90
Freon 12
75-71-8
93
m,p-Xylene
108-38-3
83
Naphthalene
91-20-3
92
o-Xylene
95-47-6
80
Tetrachloroethene
127-18-4
94
Toluene
108-88-3
93
Trichloroethene
79-01-6
101
D: Analyte not within the DoD scope of accreditation.
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
103
4-Bromofluorobenzene
460-00-4
70-130
81
Toluene-d8
2037-26-5
70-130
106
Page 16 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
N
N
O_
N
0)
z
N
N
O
N
N
eur�fins
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN I Air Toxics
Aptus - National Linen Additional Sampli
Client ID: LCS
Lab ID: 2205433A-07A Date/Time Analyzed: 5/21/22 09:32 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052103
Compound
CAS#
%Recovery
1,2,4-Trimethyl benzene
95-63-6
110
1,3,5-Trimethyl benzene
108-67-8
106
1,4-Dioxane
123-91-1
92
2-Butanone (Methyl Ethyl Ketone)
78-93-3
89
2-Propanol
67-63-0
84
4-Methyl-2-pentanone
108-10-1
92
Ethyl Acetate
141-78-6
Not Spiked
Heptane
142-82-5
93
Hexane
110-54-3
79
Styrene
100-42-5
102
D: Analyte not within the DoD scope of accreditation.
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
96
4-Bromofluorobenzene
460-00-4
70-130
90
Toluene-d8
2037-26-5
70-130
96
. % Recovery is calculated using unrounded analytical results.
Page 17 of 20

INDOOR AIR SAMPLE ANALYSES
z
N
N
O
N
N
eur�fins
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN I Air Toxics
Aptus - National Linen Additional Sampli
Client ID: LCSD
Lab ID: 2205433A-07AA Date/Time Analyzed: 5/21/22 10:11 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052104
Compound
CAS#
%Recovery
1,2,4-Trimethyl benzene
95-63-6
107
1,3,5-Trimethyl benzene
108-67-8
107
1,4-Dioxane
123-91-1
97
2-Butanone (Methyl Ethyl Ketone)
78-93-3
86
2-Propanol
67-63-0
87
4-Methyl-2-pentanone
108-10-1
96
Ethyl Acetate
141-78-6
Not Spiked
Heptane
142-82-5
95
Hexane
110-54-3
83
Styrene
100-42-5
101
D: Analyte not within the DoD scope of accreditation.
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
96
4-Bromofluorobenzene
460-00-4
70-130
86
Toluene-d8
2037-26-5
70-130
100
. % Recovery is calculated using unrounded analytical results.
Page 18 of 20

INDOOR AIR SAMPLE ANALYSES
v
cn
m
N
o_
N
0)
eur�fins
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN I Air Toxics
Aptus - National Linen Additional Sampli
Client ID: LCS
Lab ID: 2205433A-07B Date/Time Analyzed: 5/21/22 09:32 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052103sim
Compound
CAS#
%Recovery
Benzene
71-43-2
96
Chloroform
67-66-3
91
Ethyl Benzene
100-41-4
96
Freon 12
75-71-8
98
m,p-Xylene
108-38-3
84
Naphthalene
91-20-3
108
o-Xylene
95-47-6
81
Tetrachloroethene
127-18-4
96
Toluene
108-88-3
94
Trichloroethene
79-01-6
105
D: Analyte not within the DoD scope of accreditation.
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
102
4-Bromofluorobenzene
460-00-4
70-130
84
Toluene-d8
2037-26-5
70-130
105
Cn N . % Recovery is calculated using unrounded analytical results.
CDPage 19 of 20
N
N

INDOOR AIR SAMPLE ANALYSES
v
cn
m
N
cn
o_
N
0)
eur�fins
MODIFIED EPA METHOD TO-15 GC/MS SIM/FULL SCAN I Air Toxics
Aptus - National Linen Additional Sampli
Client ID: LCSD
Lab ID: 2205433A-07BB Date/Time Analyzed: 5/21/22 10:11 AM
Date/Time Collected: NA - Not Applicable Dilution Factor: 1.00
Media: NA - Not Applicable Instrument/Filename: msdv.i / v052104sim
Compound
CAS#
%Recovery
Benzene
71-43-2
94
Chloroform
67-66-3
90
Ethyl Benzene
100-41-4
96
Freon 12
75-71-8
98
m,p-Xylene
108-38-3
88
Naphthalene
91-20-3
98
o-Xylene
95-47-6
85
Tetrachloroethene
127-18-4
97
Toluene
108-88-3
93
Trichloroethene
79-01-6
103
D: Analyte not within the DoD scope of accreditation.
Surrogates
CAS#
Limits
%Recovery
1,2-Dichloroethane-d4
17060-07-0
70-130
102
4-Bromofluorobenzene
460-00-4
70-130
85
Toluene-d8
2037-26-5
70-130
104
Cn N . % Recovery is calculated using unrounded analytical results.
CDPage 20 of 20
N
N

eurofins I
180 Blue Ravine Rd. Suite B, Folsom, CA 95630
Phone [phone]; Fax [phone]
For Laboratory Use Only
PID: Workorder #: 2205433
Click links below to view.
Carnster Samplfnp Guide
Meliumm- Shroud Video "
1 of 1
Client: RDHEC PID: 2124.00
Project Name: Aptus - National Linen Additional Sampling
Project Manager: Rob Hill P.O.# 2124.00
Sampler: Rob Hill
Site Name: Nat'l Linen - 1315 S 5th Ave Wilmington, NC
Special Instructions/Notes: ANALYZE ALL CANS FOR JUST SITE SPECIFIC
ANALYTE LIST (ATTACHED ).
All 6-L cans are air samples & expected to be minimal detections but require
individually -certified cans and TO-15 SIM/LO LEVEL analysis due to low
naphthalene SL. Report J-Flags & MDLs, if necessary.
All 1-L cans are sub -slab soil gas - TO-15 STANDARD LEVEL analysis is fine. Prior
sub -slab test results showed minimal detections. Please email results in PDF and
(with
Excel EDD format with units in u with NC IHSS I Brownflelds RESIDENTIAL &
g
Turnaround Time (Rush surcharges may apply)
------------ ------ --
5 day
Canister Vacuum/Pressure
Requested Analyses
�_
_
c
m
Lab Use Only
y
;�
o
�''
6,
g
o
t- z,; .
_
a.
(2)
a z
c
Lab
ID
Sample Identification
Can #
Flow
Controller #
Start Sampling
Information
Stop Sampling
Information
Date
Time
Date
Time
j
A-1" Storage (SW)
61-2435
23888
5/11/2022
1519
5/12/2022
1520
-30 "
-5.1
X
s7
A-2 Main Laundry'
6L1291
' 21923
5/11/2022
1518
5/12/2022
1525
-28 "
-7
11 ,
A-3 Storage (SE)
6LO992
24468
5/11/2022
1516"
5/12/2022
1527
-30
-7.5
X
L'
A-4 Ambient (SE)
6LO837
22217
5/11/2022
1520
5/12/2022
1505
-30
-5
X
SS-1 Storage (SW)
1 L1950
23394
5/12/2022
2242
5/12/2022
2249
-30
-5
X
SS-2 Main Laundry
1 L 2838
23309
5/12/2022
2020
5/12/2022
2028
-29
-5
X
SS-3 Main Laundry
1 L 3070
23730
5/12/2022
2124
5/12/2022
2131
-30
-5
X
SS-4 Main Laundry
I 1912
23310
5/12/2022
2052
5/12/2022
2100
-29.5
-4
X
SS-5 Main Laundry
1 L 1560
25270
5/12/2022
1909
5/12/2022
1916
-30
-5
X
SS-6 Main Laundry
1 L 3154
24527
5l1212022
1947
5l12l2022
1954
-30
-5
X
SS-6 Dup Main Laundry
1 L 2272
24255
X
SS-7 Storage (SE)
I 1939
23930
5/1212022
1813
5/12/2022
1823
-30
-5
X
SS-8 Ironing/Sorting (NW)
1L3320
24549
5/12/2022
2147
5/12/2022
2153
-30
-5
X
SS-9 Storage (SW)
1 L 3877
24691
5/12/2022
2212
5/12/2022
2219
-29
-5
X
Relinquishe Sign ure/ ili i )t'
Date
Time
edpived by: (Signature/Affiliation)
Date
Time
Relinquished by: (Signature/Affiliatio
Date
Time
Rec t
Ad by: (Signature/Affiliation)
Dat
Time
Relinquished by: (Signature/Affiliation)
Date
Time
Received by: (Signature/Affiliation)
Date
Time
Lab Use On
Shipper Name: FedEx
Custody Seals Intact?
Yes No No
Sample Transportation Notice: Relinquishing signature on this document indicates that samples are shi ompliance with all applicable local, State, Federal, and international laws, regulations, and
ordinances of any kind. Relinquishing signature also indicates agreement to hold harmless, defend, and indemnify Eurofins Air Toxics against any claim, demand, or action, of any kind, related to the collection,
handling, of shipping of samples. D.O.T Hotline [phone]
N
N
O
N
N
s

Site -Specific Chemicals
•CAS
of Concern L LM
1,2,4-Trimethyl benzene
95636
Residential
IndoorIndoor
(ug/m3) (ug/m3)
4.2E+02 1.3E+01
Non -Residential
(ug/m3) (ug/m3)
5.3E+03 5.3E+01
•
Eurofins
.D
2.4
•
(Sp)-Eurofins
.D
AM
0.49
1,3,5-Trimethylbenzene
108678
4.2E+02
1.3E+01
5.3E+03
5.3E+01
2.4
0.49
1,4-Dioxane
123911
1.9E+01
5.6E-01
2.5E+02
2.5E+00
7.2
0.36
2-Butanone (MEK)
78933
3.5E+04
1.0E+03
4.4E+05
4.4E+03
5.9
1.5
4-Ethyltoluene
622968
---
---
---
---
2.4
0.49
4-Methyl-2-pentanone (MIBK)
108101
2.1E+04
6.3E+02
2.6E+05
2.6E+03
2
0.41
Acetone
67641
---
---
---
---
12
2.4
Benzene
71432
1.2E+01
3.6E-01
1.6E+02
1.6E+00
1.6
0.16
Chloroform
67663
4.1E+00
1.2E-01
5.3E+01
5.3E-01
2.4
0.098
Dichlorodifluoromethane (Freon 12)
75718
7.0E+02
2.1E+01
8.8E+03
8.8E+01
2.5
0.25
Ethanol
64175
---
---
---
---
9.4
1.9
Ethyl Acetate
141786
4.9E+02
1.5E+01
6.1E+03
6.1E+03
7.2
1.8
Ethylbenzene
100414
3.7E+01
1.1E+00
4.9E+02
4.9E+00
2.2
0.087
Heptane
142825
2.8E+03
8.3E+01
3.5E+04
3.5E+02
2
2
Hexane
110543
4.9E+03
1.5E+02
6.1E+04
6.1E+02
1.8
1.8
Isopropanol
67630
1.4E+03
4.2E+01
1.8E+04
1.8E+02
4.9
2.4
Naphthalene
91203
2.8E+00
8.3E-02
3.6E+01
3.6E-01
5.2
0.26
Styrene
100425
7.0E+03
2.1E+02
8.8E+04
8.8E+02
2.1
0.42
Tetrachloroethylene
127184
2.8E+02
8.3E+00
3.5E+03
3.5E+01
3.4
0.14
Toluene
108883
3.5E+04
1.0E+03
4.4E+05
4.4E+03
1.9
0.19
Trichloroethylene
79016
1.4E+01
4.2E-01
1.8E+02
1.8E+00
2.7
0.11
Trichlorofluoromethane (Freon 11)
75694
---
---
---
---
2.8
0.56
Xylene, m&p
108383/106423
7.0E+02
2.1E+01
8.8E+03
8.8E+01
2.2
0.17
Xylene, o-
95476
7.0E+02
2.1E+01
8.8E+03
8.8E+01
2.2
0.087
Notes: 5.2 Shaded cells denote analytes that have screening levels that are below lab RLs.
PLEASE REPORT NAPHTHALENE RESULTS ON ALL ANALYSES WITH J-FLAG TO
THE MDL.
--- The NC screening level has been vacated for this compound since the initial sampling
was done in 2020. These analytes can be omitted from the site -specific compound
list for these analyses.

SLAB SOIL GAS ANALYSES
urofins
Environment Testing
America
ANALYTICAL REPORT
Eurofins Savannah
5102 LaRoche Avenue
Savannah, GA 31404
Tel: [phone]
Laboratory Job ID- 680-215835-1
Client Project/Site: Aptus - National Linen (Wilmington)
For:
RDH Environmental Consulting
4012 Ridgebrook Bluffs Drive
Raleigh, North Carolina 27603
Attn: Robert D Hill
Authorized for release by.
512412022 12:44:26 PM
John Andros, Project Manager 1
[phone]
[e-mail]
The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI
requirements for accredited parameters, exceptions are noted in this report. This
report may not be reproduced except in full, and with written approval from the
laboratory. For questions please contact the Project Manager at the e-mail address or
telephone number listed on this page.
This report has been electronically signed and authorized by the signatory. Electronic
signature is intended to be the legally binding equivalent of a traditionally handwritten
signature.
Results relate only to the items tested and the sample(s) as received by the laboratory.

SUB -SLAB SOIL GAS ANALYSES
Definitions/Glossary
Client: RDH Environmental Consulting
Project/Site: Aptus - National Linen (Wilmington)
Glossary
Abbreviation These commonly used abbreviations may or may not be present in this report.
tt Listed under the "D" column to designate that the result is reported on a dry weight basis
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level'
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRIES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Job ID: 680-215835-1
Eurofins Savannah
Page 2 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
Sample Summary
Client: RDH Environmental Consulting
Project/Site: Aptus - National Linen (Wilmington)
Lab Sample ID
Client Sample ID
Matrix
680-215835-5
SS-1 Storage (SW)
Air
680-215835-6
SS-2 Main Laundry
Air
680-215835-7
SS-3 Main Laundry
Air
680-215835-8
SS-4 Main Laundry
Air
680-215835-9
SS-5 Main Laundry
Air
680-215835-10
SS-6 Main Laundry
Air
680-215835-11
SS-6 Dup Main Laundry
Air
680-215835-12
SS-7 Storage (SE)
Air
680-215835-13
SS-8 Ironing/Sorting (NW)
Air
680-215835-14
SS-9 Storage (SW)
Air
Collected Received
05/12/22 22:49 05/17/22 09:42
05/12/22 20:28 05/17/22 09:42
05/12/22 21:31 05/17/22 09:42
05/12/22 21:00 05/17/22 09:42
05/12/22 19:16 05/17/22 09:42
05/12/22 19:54 05/17/22 09:42
05/12/22 19:54 05/17/22 09:42
05/12/22 18:23 05/17/22 09:42
05/12/22 21:53 05/17/22 09:42
05/12/22 22:19 05/17/22 09:42
Job ID: 680-215835-1
Page 3 of 27
Eurofins Savannah
5/24/2022

SUB -SLAB SOIL GAS ANALYSES
Case Narrative C
Client: RDH Environmental Consulting Job ID: 680-215835-1
Project/Site: Aptus - National Linen (Wilmington)
Job ID: 680-215835-1
Laboratory: Eurofins Savannah
Narrative
Job Narrative
680-215835-1
Comments
No additional comments.
Receipt
The samples were received on 5/17/2022 9:42 AM. Unless otherwise noted below, the samples arrived in good condition, and where
required, properly preserved and on ice.
No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.
Eurofins Savannah
Page 4 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
Method Summary
Client: RDH Environmental Consulting Job ID: 680-215835-1
Project/Site: Aptus - National Linen (Wilmington)
Method Method Description Protocol Laboratory
Subcontract General Subcontract Method None Eurofins
Protocol References:
None = None
Laboratory References:
Eurofins = Eurofins Air Toxics, 180 Blue Ravine Road, Suite B, Folsom, CA 95630
Eurofins Savannah
Page 5 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
tiff eurofins C
Air Toxics
5/24/2022
Mr. John Andros
Eurofins Test America C
5102 LaRoche
Savannah GA 31404 •
Project Name: Aptus - National Linen Additional Sampli
Project #:
Workorder #: 2205433B
Dear Mr. John Andros
The following report includes the data for the above referenced project for sample(s)
received on 5/17/2022 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
EuWiris Air Toxics, LLC
180 Blue Ravine Road, Suite B
Folsom, CA 95630
T 916-985.1000
F 916-351-8279
www, a i rtox ics.cam
Page 1 of 21
Page 6 of 27 5/24/2022

%% eurofins
SUB -SLAB SOIL GAS ANALYSES
CLIENT:
PHONE:
FAX:
DATE RECEIVED:
DATE COMPLETED:
Air Toxics
WORK ORDER #: 2205433B
Work Order Summary
Mr. John Andros BILL TO:
Eurofins Environment Testing
5102 LaRoche
Savannah, GA 31404
Accounts Payable
Eurofins Environment Testing
4104 Shuffel St NW
North Canton, OH 44720
912-354-7858 P.O.# 2124.00
PROJECT # Aptus - National Linen Additional Sampli
05/17/2022 CONTACT: Brian Whittaker
05/24/2022
RECEIPT
FINAL
FRACTION #
NAME
TEST
VAC./PRES.
PRESSURE
05A
SS-1 Storage (SW)
TO-15
4.5 "Hg
10 psi
06A
SS-2 Main Laundry
TO-15
4.3 "Hg
9.9 psi
07A
SS-3 Main Laundry
TO-15
5.1 "Hg
9.9 psi
08A
SS-4 Main Laundry
TO-15
2.2 "Hg
10.1 psi
09A
SS-5 Main Laundry
TO-15
4.7 "Hg
9.8 psi
10A
SS-6 Main Laundry
TO-15
5.9 "Hg
10.1 psi
11A
SS-6 Dup Main Laundry
TO-15
5.9 "Hg
10 psi
12A
SS-7 Storage (SE)
TO-15
4.1 "Hg
9.8 psi
13A
SS-8 Ironing/Sorting (NW)
TO-15
4.7 "Hg
9.8 psi
14A
SS-9 Storage (SW)
TO-15
4.9 "Hg
10 psi
15A
Lab Blank
TO-15
NA
NA
16A
CCV
TO-15
NA
NA
17A
LCS
TO-15
NA
NA
17AA
LCSD
TO-15
NA
NA
CERTIFIED BY:
Technical Director
DATE: OS/24/22
Certification numbers: AZ Licensure AZ0775, FL NELAP — E87680, LA NELAP — 02089, NH NELAP - 209221, NJ NELAP - CA016,
NY NELAP - 11291, TX NELAP - T104704434-21-17, UT NELAP — CA009332021-13, VA NELAP - 10615, WA NELAP - C935
Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program)
Accreditation number: CA300005-015, Effective date: 10/18/2021, Expiration date: 10/17/2022.
Eurofins Air Toxics, LLC certifies that the test results contained in this report meet all requirements of the NELAC standards
This report shall not be reproduced, except in full, without the written approval ofEurofins Air Toxics, LLC.
180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630
[phone] . [phone] . FAX [phone]
Page 2 of 21
Page 7 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
titi eurofins C
Air Tvxics
LABORATORY NARRATIVE
EPA Method TO-15
Eurofins Test America
Workorder# 2205433B
Ten 1 Liter Summa Canister samples were received on May 17, 2022. The laboratory performed analysis
via EPA Method TO-15 using GC/MS in the full scan mode.
Receiving Notes
There were no receiving discrepancies.
Analytical Notes
Non-standard compounds may have different acceptance criteria than the standard TO- 14A/TO-15
compound list as per contract or verbal agreement.
All Quality Control Limit exceedances and affected sample results are noted by flags. Each flag is defined
at the bottom of this Case Narrative and on each Sample Result Summary page. Target compound
non -detects in the samples that are associated with high bias in QC analyses have not been flagged.
Definition of Data Oualifyin2 Flags
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
rl-File was requantified for the purpose of reissue
Page 3 of 21
Page 8 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
eurof ins
Air Tv xics
Summary
of Detected Compounds
EPA METHOD TO-15 GC/MS FULL SCAN
Client Sample ID: SS-1 Storage (SW)
Lab ID#: 2205433B-05A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
Chloroform
0.99
6.7
4.8
33
2-Propanol
4.0
8.1
9.7
20
Trichloroethene
0.99
1.4
5.3
7.4
Freon 12
0.99
4.2
4.9
21
Tetrachloroethene
0.99
4.2
6.7
29
Client Sample ID: SS-2 Main Laundry
Lab ID#: 2205433B-06A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
Chloroform
0.98
1.8
4.8
8.9
2-Propanol
3.9
7.0
9.6
17
Freon 12
0.98
4.1
4.8
20
Tetrachloroethene
0.98
1.7
6.6
11
m,p-Xylene
0.98
1.4
4.2
6.0
Toluene
0.98
1.7
3.7
6.4
Client Sample ID: SS-3 Main Laundry
Lab ID#: 2205433B-07A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
2-Propanol
4.0
7.0
9.9
17
Trichloroethene
1.0
1.6
5.4
8.7
Freon 12
1.0
2.7
5.0
13
Tetrachloroethene
1.0
2.7
6.8
18
Client Sample ID: SS-4 Main Laundry
Lab ID#: 2205433B-08A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
Chloroform
0.91
2.7
4.4
13
2-Propanol
3.6
13
8.9
33
Page 4 of 21
Page 9 of 27
5/24/2022
C
0

SUB -SLAB SOIL GAS ANALYSES
� eurof ins
Air Toxics
Summary of Detected Compounds
EPA METHOD TO-15 GC/MS FULL SCAN
Client Sample ID: SS-4 Main Laundry
Lab ID#: 2205433B-08A
Trichloroethene 0.91 2.8
4.9
Freon 12 0.91 6.6
4.5
m,p-Xylene 0.91 0.91 J
4.0
Toluene 0.91 1.1
3.4
Client Sample ID: SS-5 Main Laundry
Lab ID#: 2205433B-09A
15
33
3.9 J
4.2
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.99
57
4.8
280
2-Propanol
4.0
7.8
9.7
19
Trichloroethene
0.99
16
5.3
83
Freon 12
0.99
7.3
4.9
36
Tetrachloroethene
0.99
1.0
6.7
7.0
m,p-Xylene
0.99
1.2
4.3
5.0
Hexane
0.99
1.7
3.5
5.9
Toluene
0.99
1.7
3.7
6.4
Client Sample ID: SS-6 Main Laundry
Lab ID#: 2205433B-10A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
Chloroform
1.0
5.4
5.1
26
2-Propanol
4.2
12
10
30
Trichloroethene
1.0
2.7
5.6
14
Freon 12
1.0
3.1
5.2
15
Tetrachloroethene
1.0
1.8
7.1
12
2-Butanone (Methyl Ethyl Ketone)
4.2
7.4
12
22
Toluene
1.0
1.5
4.0
5.6
Client Sample ID: SS-6 Dup Main Laundry
Lab ID#: 2205433B-11A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
C
0
Page 5 of 21
Page 10 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
eurof ins
Air Tv xics
Summary of Detected Compounds
EPA METHOD
TO-15 GC/MS FULL SCAN
Client Sample ID: SS-6 Dup Main Laundry
Lab ID#: 2205433B-11A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
Chloroform
1.0
5.0
5.1
25
2-Propanol
4.2
11
10
26
Trichloroethene
1.0
2.8
5.6
15
Freon 12
1.0
3.2
5.2
16
Tetrachloroethene
1.0
7.5
7.1
51
2-Butanone (Methyl Ethyl Ketone)
4.2
7.4
12
22
Toluene
1.0
1.5
3.9
5.8
Client Sample ID: SS-7 Storage (SE)
Lab ID#: 2205433B-12A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
2-Propanol
3.9
13
9.5
33
Freon 12
0.96
110
4.8
550
4-Methyl-2-pentanone
0.96
1.1
4.0
4.4
m,p-Xylene
0.96
1.2
4.2
5.2
Toluene
0.96
1.8
3.6
6.7
Client Sample ID: SS-8 Ironing/Sorting (NW)
Lab ID#: 2205433B-13A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
2-Propanol
4.0
11
9.7
26
Client Sample ID: SS-9 Storage (SW)
Lab ID#: 2205433B-14A
Rpt. Limit
Amount
Rpt. Limit
Amount
Compound
(ppbv)
(ppbv)
(ug/m3)
(ug/m3)
2-Propanol
4.0
64
9.9
160
1,3,5-Trimethyl benzene
1.0
1.6
4.9
7.7
4-Methyl-2-pentanone
1.0
1.9
4.1
7.6
Tetrachloroethene
1.0
21
6.8
140
Page 6 of 21
Page 11 of 27
5/24/2022
C
0

SUB -SLAB SOIL GAS ANALYSES
, % eurofins
Air Toxics
Summary of Detected Compounds
EPA METHOD TO-15 GC/MS FULL SCAN
Client Sample ID: SS-9 Storage (SW)
Lab ID#: 2205433B-14A
2-Butanone (Methyl Ethyl Ketone) 4.0 12 12 36
1,2,4-Trimethyl benzene 1.0 3.2 4.9 16
Page 7 of 21
Page 12 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Tvxics
Client Sample ID: SS-1 Storage (SW)
Lab ID#: 2205433B-05A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052108 Date of Collection: 5/12/22 10:49:00 PM
Dil. Factor: 1.98 Date of Analysis: 5/21/22 03:03 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.99
6.7
4.8
33
2-Propanol
4.0
8.1
9.7
20
Styrene
0.99
Not Detected
4.2
Not Detected
Trichloroethene
0.99
1.4
5.3
7.4
1,3,5-Trimethyl benzene
0.99
Not Detected
4.9
Not Detected
Benzene
0.99
Not Detected
3.2
Not Detected
Freon 12
0.99
4.2
4.9
21
Ethyl Acetate
4.0
Not Detected
14
Not Detected
Heptane
0.99
Not Detected
4.0
Not Detected
4-Methyl-2-pentanone
0.99
Not Detected
4.0
Not Detected
Tetrachloroethene
0.99
4.2
6.7
29
m,p-Xylene
0.99
Not Detected
4.3
Not Detected
2-Butanone (Methyl Ethyl Ketone)
4.0
Not Detected
12
Not Detected
1,4-Dioxane
4.0
Not Detected
14
Not Detected
Ethyl Benzene
0.99
Not Detected
4.3
Not Detected
Hexane
0.99
Not Detected
3.5
Not Detected
Naphthalene
2.0
Not Detected
10
Not Detected
Toluene
0.99
Not Detected
3.7
Not Detected
1,2,4-Trimethyl benzene
0.99
Not Detected
4.9
Not Detected
o-Xylene
0.99
Not Detected
4.3
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
98
70-130
1,2-Dichloroethane-d4
115
70-130
4-Bromofluorobenzene
96
70-130
C
0
Page 8 of 21
Page 13 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Toxics
Client Sample ID: SS-2 Main Laundry
Lab ID#: 2205433B-06A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052109 Date of Collection: 5/12/22 8:28:00 PM
Dil. Factor: 1.95 Date of Analysis: 5/21/22 03:36 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.98
1.8
4.8
8.9
2-Propanol
3.9
7.0
9.6
17
Styrene
0.98
Not Detected
4.2
Not Detected
Trichloroethene
0.98
Not Detected
5.2
Not Detected
1,3,5-Trimethyl benzene
0.98
Not Detected
4.8
Not Detected
Benzene
0.98
Not Detected
3.1
Not Detected
Freon 12
0.98
4.1
4.8
20
Ethyl Acetate
3.9
Not Detected
14
Not Detected
Heptane
0.98
Not Detected
4.0
Not Detected
4-Methyl-2-pentanone
0.98
Not Detected
4.0
Not Detected
Tetrachloroethene
0.98
1.7
6.6
11
m,p-Xylene
0.98
1.4
4.2
6.0
2-Butanone (Methyl Ethyl Ketone)
3.9
Not Detected
12
Not Detected
1,4-Dioxane
3.9
Not Detected
14
Not Detected
Ethyl Benzene
0.98
Not Detected
4.2
Not Detected
Hexane
0.98
Not Detected
3.4
Not Detected
Naphthalene
2.0
Not Detected
10
Not Detected
Toluene
0.98
1.7
3.7
6.4
1,2,4-Trimethyl benzene
0.98
Not Detected
4.8
Not Detected
o-Xylene
0.98
Not Detected
4.2
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
99
70-130
1,2-Dichloroethane-d4
ill
70-130
4-Bromofluorobenzene
96
70-130
C
0
Page 9 of 21
Page 14 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Toxics
Client Sample ID: SS-3 Main Laundry
Lab ID#: 2205433B-07A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052110 Date of Collection: 5/12/22 9:31:00 PM
Dil. Factor: 2.02 Date of Analysis: 5/21/22 04:10 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
1.0
Not Detected
4.9
Not Detected
2-Propanol
4.0
7.0
9.9
17
Styrene
1.0
Not Detected
4.3
Not Detected
Trichloroethene
1.0
1.6
5.4
8.7
1,3,5-Trimethyl benzene
1.0
Not Detected
5.0
Not Detected
Benzene
1.0
Not Detected
3.2
Not Detected
Freon 12
1.0
2.7
5.0
13
Ethyl Acetate
4.0
Not Detected
14
Not Detected
Heptane
1.0
Not Detected
4.1
Not Detected
4-Methyl-2-pentanone
1.0
Not Detected
4.1
Not Detected
Tetrachloroethene
1.0
2.7
6.8
18
m,p-Xylene
1.0
Not Detected
4.4
Not Detected
2-Butanone (Methyl Ethyl Ketone)
4.0
Not Detected
12
Not Detected
1,4-Dioxane
4.0
Not Detected
14
Not Detected
Ethyl Benzene
1.0
Not Detected
4.4
Not Detected
Hexane
1.0
Not Detected
3.6
Not Detected
Naphthalene
2.0
Not Detected
10
Not Detected
Toluene
1.0
Not Detected
3.8
Not Detected
1,2,4-Trimethyl benzene
1.0
Not Detected
5.0
Not Detected
o-Xylene
1.0
Not Detected
4.4
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
99
70-130
1,2-Dichloroethane-d4
109
70-130
4-Bromofluorobenzene
97
70-130
C
0
Page 10 of 21
Page 15 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Toxics
Client Sample ID: SS-4 Main Laundry
Lab ID#: 2205433B-08A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052111 Date of Collection: 5/12/22 9:00:00 PM
Dil. Factor: 1.82 Date of Analysis: 5/21/22 04:44 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.91
2.7
4.4
13
2-Propanol
3.6
13
8.9
33
Styrene
0.91
Not Detected
3.9
Not Detected
Trichloroethene
0.91
2.8
4.9
15
1,3,5-Trimethyl benzene
0.91
Not Detected
4.5
Not Detected
Benzene
0.91
Not Detected
2.9
Not Detected
Freon 12
0.91
6.6
4.5
33
Ethyl Acetate
3.6
Not Detected
13
Not Detected
Heptane
0.91
Not Detected
3.7
Not Detected
4-Methyl-2-pentanone
0.91
Not Detected
3.7
Not Detected
Tetrachloroethene
0.91
Not Detected
6.2
Not Detected
m,p-Xylene
0.91
0.91 J
4.0
3.9 J
2-Butanone (Methyl Ethyl Ketone)
3.6
Not Detected
11
Not Detected
1,4-Dioxane
3.6
Not Detected
13
Not Detected
Ethyl Benzene
0.91
Not Detected
4.0
Not Detected
Hexane
0.91
Not Detected
3.2
N of Detected
Naphthalene
1.8
Not Detected
9.5
Not Detected
Toluene
0.91
1.1
3.4
4.2
1,2,4-Trimethyl benzene
0.91
Not Detected
4.5
Not Detected
o-Xylene
0.91
Not Detected
4.0
Not Detected
J = Estimated value.
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8 99 70-130
1,2-Dichloroethane-d4 113 70-130
4-Bromofluorobenzene 95 70-130
C
0
Page 11 of 21
Page 16 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
eurof ins
Air Toxics
Client Sample ID: SS-5 Main Laundry
Lab ID#: 2205433B-09A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052112 Date of Collection: 5/12/22 7:16:00 PM
Dil. Factor: 1.98 Date of Analysis: 5/21/22 05:17 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.99
57
4.8
280
2-Propanol
4.0
7.8
9.7
19
Styrene
0.99
Not Detected
4.2
Not Detected
Trichloroethene
0.99
16
5.3
83
1,3,5-Trimethyl benzene
0.99
Not Detected
4.9
Not Detected
Benzene
0.99
Not Detected
3.2
Not Detected
Freon 12
0.99
7.3
4.9
36
Ethyl Acetate
4.0
Not Detected
14
Not Detected
Heptane
0.99
Not Detected
4.0
Not Detected
4-Methyl-2-pentanone
0.99
Not Detected
4.0
Not Detected
Tetrachloroethene
0.99
1.0
6.7
7.0
m,p-Xylene
0.99
1.2
4.3
5.0
2-Butanone (Methyl Ethyl Ketone)
4.0
Not Detected
12
Not Detected
1,4-Dioxane
4.0
Not Detected
14
Not Detected
Ethyl Benzene
0.99
Not Detected
4.3
Not Detected
Hexane
0.99
1.7
3.5
5.9
Naphthalene
2.0
Not Detected
10
Not Detected
Toluene
0.99
1.7
3.7
6.4
1,2,4-Trimethyl benzene
0.99
Not Detected
4.9
Not Detected
o-Xylene
0.99
Not Detected
4.3
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
100
70-130
1,2-Dichloroethane-d4
112
70-130
4-Bromofluorobenzene
96
70-130
C
0
Page 12 of 21
Page 17 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
eurof ins
Air Toxics
Client Sample ID: SS-6 Main Laundry
Lab ID#: 220543313-10A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052113 Date of Collection: 5/12/22 7:54:00 PM
Dil. Factor: 2.10 Date of Analysis: 5/21/22 05:51 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
1.0
5.4
5.1
26
2-Propanol
4.2
12
10
30
Styrene
1.0
Not Detected
4.5
Not Detected
Trichloroethene
1.0
2.7
5.6
14
1,3,5-Trimethyl benzene
1.0
Not Detected
5.2
Not Detected
Benzene
1.0
Not Detected
3.4
Not Detected
Freon 12
1.0
3.1
5.2
15
Ethyl Acetate
4.2
Not Detected
15
Not Detected
Heptane
1.0
Not Detected
4.3
Not Detected
4-Methyl-2-pentanone
1.0
Not Detected
4.3
Not Detected
Tetrachloroethene
1.0
1.8
7.1
12
m,p-Xylene
1.0
Not Detected
4.6
Not Detected
2-Butanone (Methyl Ethyl Ketone)
4.2
7.4
12
22
1,4-Dioxane
4.2
Not Detected
15
Not Detected
Ethyl Benzene
1.0
Not Detected
4.6
Not Detected
Hexane
1.0
Not Detected
3.7
Not Detected
Naphthalene
2.1
Not Detected
11
Not Detected
Toluene
1.0
1.5
4.0
5.6
1,2,4-Trimethyl benzene
1.0
Not Detected
5.2
Not Detected
o-Xylene
1.0
Not Detected
4.6
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
101
70-130
1,2-Dichloroethane-d4
112
70-130
4-Bromofluorobenzene
98
70-130
C
0
Page 13 of 21
Page 18 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
eurof ins
Air Tv xics
Client Sample ID: SS-6 Dup Main Laundry
Lab ID#: 220543313-11A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: j052114 Date of Collection: 5/12/22 7:54:00 PM
Dil. Factor: 2.09 Date of Analysis: 5/21/22 06:24 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
1.0
5.0
5.1
25
2-Propanol
4.2
11
10
26
Styrene
1.0
Not Detected
4.4
Not Detected
Trichloroethene
1.0
2.8
5.6
15
1,3,5-Trimethyl benzene
1.0
Not Detected
5.1
Not Detected
Benzene
1.0
Not Detected
3.3
Not Detected
Freon 12
1.0
3.2
5.2
16
Ethyl Acetate
4.2
Not Detected
15
Not Detected
Heptane
1.0
Not Detected
4.3
Not Detected
4-Methyl-2-pentanone
1.0
Not Detected
4.3
Not Detected
Tetrachloroethene
1.0
7.5
7.1
51
m,p-Xylene
1.0
Not Detected
4.5
Not Detected
2-Butanone (Methyl Ethyl Ketone)
4.2
7.4
12
22
1,4-Dioxane
4.2
Not Detected
15
Not Detected
Ethyl Benzene
1.0
Not Detected
4.5
Not Detected
Hexane
1.0
Not Detected
3.7
Not Detected
Naphthalene
2.1
Not Detected
11
Not Detected
Toluene
1.0
1.5
3.9
5.8
1,2,4-Trimethyl benzene
1.0
Not Detected
5.1
Not Detected
o-Xylene
1.0
Not Detected
4.5
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
100
70-130
1,2-Dichloroethane-d4
110
70-130
4-Bromofluorobenzene
99
70-130
C
0
Page 14 of 21
Page 19 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Tvxics
Client Sample ID: SS-7 Storage (SE)
Lab ID#: 220543313-12A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052115 Date of Collection: 5/12/22 6:23:00 PM
Dil. Factor: 1.93 Date of Analysis: 5/21/22 06:58 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.96
Not Detected
4.7
Not Detected
2-Propanol
3.9
13
9.5
33
Styrene
0.96
Not Detected
4.1
Not Detected
Trichloroethene
0.96
Not Detected
5.2
Not Detected
1,3,5-Trimethyl benzene
0.96
Not Detected
4.7
Not Detected
Benzene
0.96
Not Detected
3.1
Not Detected
Freon 12
0.96
110
4.8
550
Ethyl Acetate
3.9
Not Detected
14
Not Detected
Heptane
0.96
Not Detected
4.0
Not Detected
4-Methyl-2-pentanone
0.96
1.1
4.0
4.4
Tetrachloroethene
0.96
Not Detected
6.5
Not Detected
m,p-Xylene
0.96
1.2
4.2
5.2
2-Butanone (Methyl Ethyl Ketone)
3.9
Not Detected
11
Not Detected
1,4-Dioxane
3.9
Not Detected
14
Not Detected
Ethyl Benzene
0.96
Not Detected
4.2
Not Detected
Hexane
0.96
Not Detected
3.4
Not Detected
Naphthalene
1.9
Not Detected
10
Not Detected
Toluene
0.96
1.8
3.6
6.7
1,2,4-Trimethyl benzene
0.96
Not Detected
4.7
Not Detected
o-Xylene
0.96
Not Detected
4.2
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
98
70-130
1,2-Dichloroethane-d4
ill
70-130
4-Bromofluorobenzene
96
70-130
C
0
Page 15 of 21
Page 20 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Toxics
Client Sample ID: SS-8 Ironing/Sorting (NV)
Lab ID#: 2205433B-13A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052116 Date of Collection: 5/12/22 9:53:00 PM
Dil. Factor: 1.98 Date of Analysis: 5/21/22 07:31 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.99
Not Detected
4.8
Not Detected
2-Propanol
4.0
11
9.7
26
Styrene
0.99
Not Detected
4.2
Not Detected
Trichloroethene
0.99
Not Detected
5.3
Not Detected
1,3,5-Trimethyl benzene
0.99
Not Detected
4.9
Not Detected
Benzene
0.99
Not Detected
3.2
Not Detected
Freon 12
0.99
Not Detected
4.9
Not Detected
Ethyl Acetate
4.0
Not Detected
14
Not Detected
Heptane
0.99
Not Detected
4.0
Not Detected
4-Methyl-2-pentanone
0.99
Not Detected
4.0
Not Detected
Tetrachloroethene
0.99
Not Detected
6.7
Not Detected
m,p-Xylene
0.99
Not Detected
4.3
Not Detected
2-Butanone (Methyl Ethyl Ketone)
4.0
Not Detected
12
Not Detected
1,4-Dioxane
4.0
Not Detected
14
Not Detected
Ethyl Benzene
0.99
Not Detected
4.3
Not Detected
Hexane
0.99
Not Detected
3.5
Not Detected
Naphthalene
2.0
Not Detected
10
Not Detected
Toluene
0.99
Not Detected
3.7
Not Detected
1,2,4-Trimethyl benzene
0.99
Not Detected
4.9
Not Detected
o-Xylene
0.99
Not Detected
4.3
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
98
70-130
1,2-Dichloroethane-d4
ill
70-130
4-Bromofluorobenzene
96
70-130
C
0
Page 16 of 21
Page 21 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Tvxics
Client Sample ID: SS-9 Storage (SW)
Lab ID#: 2205433B-14A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052117 Date of Collection: 5/12/22 10:19:00 PM
Dil. Factor: 2.01 Date of Analysis: 5/21/22 08:05 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
1.0
Not Detected
4.9
Not Detected
2-Propanol
4.0
64
9.9
160
Styrene
1.0
Not Detected
4.3
Not Detected
Trichloroethene
1.0
Not Detected
5.4
Not Detected
1,3,5-Trimethyl benzene
1.0
1.6
4.9
7.7
Benzene
1.0
Not Detected
3.2
Not Detected
Freon 12
1.0
Not Detected
5.0
Not Detected
Ethyl Acetate
4.0
Not Detected
14
Not Detected
Heptane
1.0
Not Detected
4.1
Not Detected
4-Methyl-2-pentanone
1.0
1.9
4.1
7.6
Tetrachloroethene
1.0
21
6.8
140
m,p-Xylene
1.0
Not Detected
4.4
Not Detected
2-Butanone (Methyl Ethyl Ketone)
4.0
12
12
36
1,4-Dioxane
4.0
Not Detected
14
Not Detected
Ethyl Benzene
1.0
Not Detected
4.4
Not Detected
Hexane
1.0
Not Detected
3.5
Not Detected
Naphthalene
2.0
Not Detected
10
Not Detected
Toluene
1.0
Not Detected
3.8
Not Detected
1,2,4-Trimethyl benzene
1.0
3.2
4.9
16
o-Xylene
1.0
Not Detected
4.4
Not Detected
Container Type: 1 Liter Summa Canister
Method
Surrogates
%Recovery
Limits
Toluene-d8
99
70-130
1,2-Dichloroethane-d4
112
70-130
4-Bromofluorobenzene
99
70-130
C
0
Page 17 of 21
Page 22 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air Tvxics
Client Sample ID: Lab Blank
Lab ID#: 2205433B-15A
EPA METHOD TO45 GC/MS FULL SCAN
File Name: j052107 Date of Collection: NA
Dil. Factor: 1.00 Date of Analysis: 5/21/22 01:38 PM
Rpt. Limit Amount Rpt. Limit Amount
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Chloroform
0.50
Not Detected
2.4
Not Detected
2-Propanol
2.0
Not Detected
4.9
Not Detected
Styrene
0.50
Not Detected
2.1
Not Detected
Trichloroethene
0.50
Not Detected
2.7
Not Detected
1,3,5-Trimethyl benzene
0.50
Not Detected
2.4
Not Detected
Benzene
0.50
Not Detected
1.6
Not Detected
Freon 12
0.50
Not Detected
2.5
Not Detected
Ethyl Acetate
2.0
Not Detected
7.2
Not Detected
Heptane
0.50
Not Detected
2.0
Not Detected
4-Methyl-2-pentanone
0.50
Not Detected
2.0
Not Detected
Tetrachloroethene
0.50
Not Detected
3.4
Not Detected
m,p-Xylene
0.50
Not Detected
2.2
Not Detected
2-Butanone (Methyl Ethyl Ketone)
2.0
Not Detected
5.9
Not Detected
1,4-Dioxane
2.0
Not Detected
7.2
Not Detected
Ethyl Benzene
0.50
Not Detected
2.2
Not Detected
Hexane
0.50
Not Detected
1.8
Not Detected
Naphthalene
1.0
Not Detected
5.2
Not Detected
Toluene
0.50
Not Detected
1.9
Not Detected
1,2,4-Trimethyl benzene
0.50
Not Detected
2.4
Not Detected
o-Xylene
0.50
Not Detected
2.2
Not Detected
Container Type: NA - Not Applicable
Method
Surrogates
%Recovery
Limits
Toluene-d8
95
70-130
1,2-Dichloroethane-d4
108
70-130
4-Bromofluorobenzene
93
70-130
C
0
Page 18 of 21
Page 23 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
ti% eurofins
Air Tvxics
Client Sample ID: CCV
Lab ID#: 2205433B-16A
EPA METHOD TO-l5 GC/MS FULL SCAN
File Name: j052102 Date of Collection: NA
Dil. Factor: 1.00 Date of Analysis: 5/21/22 10:27 AM
Compound %Recovery
Chloroform
104
2-Propanol
ill
Styrene
131 Q
Trichloroethene
108
1,3,5-Trimethyl benzene
123
Benzene
104
Freon 12
100
Ethyl Acetate
97
Heptane
121
4-Methyl-2-pentanone
106
Tetrachloroethene
114
m,p-Xylene
124
2-Butanone (Methyl Ethyl Ketone)
103
1,4-Dioxane
106
Ethyl Benzene
119
Hexane
108
Naphthalene
86
Toluene
98
1,2,4-Trimethyl benzene
125
o-Xylene
125
Q = Exceeds Quality Control limits.
Container Type: NA - Not Applicable
Method
Surrogates
%Recovery Limits
Toluene-d8 95 70-130
1,2-Dichloroethane-d4 ill 70-130
4-Bromofluorobenzene 100 70-130
C
0
Page 19 of 21
Page 24 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
a eurof ins
Air T xic v s
Client Sample ID: LCS
Lab ID#: 2205433B-17A
EPA METHOD TO-l5 GC/MS FULL SCAN
File Name: j052105 Date of Collection: NA
Dil. Factor: 1.00 Date of Analysis: 5/21/22 12:22 PM
Method
Compound %Recovery Limits
Chloroform
100
70-130
2-Propanol
115
70-130
Styrene
130
70-130
Trichloroethene
102
70-130
1,3,5-Trimethyl benzene
117
70-130
Benzene
101
70-130
Freon 12
110
70-130
Ethyl Acetate
Not Spiked
Heptane
121
70-130
4-Methyl-2-pentanone
116
70-130
Tetrachloroethene
108
70-130
m,p-Xylene
124
70-130
2-Butanone (Methyl Ethyl Ketone)
107
70-130
1,4-Dioxane
ill
70-130
Ethyl Benzene
119
70-130
Hexane
113
70-130
Naphthalene
103
60-140
Toluene
100
70-130
1,2,4-Trimethyl benzene
120
70-130
o-Xylene
124
70-130
Container Type: NA - Not Applicable
Method
Surrogates
%Recovery
Limits
Toluene-d8
97
70-130
1,2-Dichloroethane-d4
104
70-130
4-Bromofluorobenzene
95
70-130
C
0
Page 20 of 21
Page 25 of 27 5/24/2022

SUB -SLAB SOIL GAS ANALYSES
eurof ins
Air T xic v s
Client Sample ID: LCSD
Lab ID#: 2205433B-17AA
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: j052106 Date of Collection: NA
Dil. Factor: 1.00 Date of Analysis: 5/21/22 12:52 PM
Method
Compound %Recovery Limits
Chloroform
96
70-130
2-Propanol
100
70-130
Styrene
131 Q
70-130
Trichloroethene
100
70-130
1,3,5-Trimethyl benzene
118
70-130
Benzene
107
70-130
Freon 12
89
70-130
Ethyl Acetate
Not Spiked
Heptane
124
70-130
4-Methyl-2-pentanone
104
70-130
Tetrachloroethene
ill
70-130
m,p-Xylene
124
70-130
2-Butanone (Methyl Ethyl Ketone)
114
70-130
1,4-Dioxane
106
70-130
Ethyl Benzene
120
70-130
Hexane
98
70-130
Naphthalene
119
60-140
Toluene
90
70-130
1,2,4-Trimethyl benzene
125
70-130
o-Xylene
125
70-130
Q = Exceeds Quality Control limits.
Container Type: NA - Not Applicable
Method
Surrogates
%Recovery
Limits
Toluene-d8 86 70-130
1,2-Dichloroethane-d4 96 70-130
4-Bromofluorobenzene 94 70-130
C
0
Page 21 of 21
Page 26 of 27 5/24/2022

':1 " SUB -SLAB SOIL GAS ANALYSES
%�.eurofins 1 alysis Request- ••
I Ali° TCIXICS For Laboratory Use Only PID: Workorder #: 2205433 Click links below to view:
180 Blue Ravine Rd. Suite B, Folsom, CA 95630 Canister Samplina Guide
Phone /8001 985-5955- Fax [phone] Helium Shroud Video
1 of 1
Client: RDHEC PID: 2124.00
Project Name: Aptus - National Linen Additional Sampling
Project Manager: Rob Hill P.O.# 2124.00
Sampler: Rob Hill
Site Name: Nat'l Linen -1315 S 5th Ave Wilmington, INC
Special Instructions/Notes: ANALYZE ALL CANS FOR JUST SITE SPECIFIC
ANALYZE LIST (ATTACHED).
All 6-L cans are air samples & expected to be minimal detections but require
individually -certified cans and TO-15 SIMILO LEVEL analysis due to low
naphthalene SL. Report J-Flags & MDLs, if necessary.
All 1-L cans are sub -slab soil gas - TO-15 STANDARD LEVEL analysis is fine. Prior
sub -slab test results showed minimal detections. Please email results in PDF and
Excel EDD format with units in ug/m' (with NC IHSB / Brownfields RESIDENTIAL &
Turnaround Time (Rush surcharges may apply)
5 day V
Canister Vacuum/Pressure
Requested Analyses
--
.E
_
-
Lab Use Only
y
+ -
o
n, a
d
z
+ z
SS..
Q-
af
ra a
Z
iT_ 0
Lab
ID
Sample Identification
Can #
Flow
Controller#
Start Sampling
Information
Stop Sampling
Information
Date
Time
Date
Time
A-1 Storage (SW)
61-2435
23888
5/11/2022
1519
5/12/2022
1520
-30
-5.1
X
A-2 Main Laundry
6L1291
21923
5/11/2022
1518
5/12/2022
1525
28
7
X
A-3 Storage (SE)
6LO992
24468
5/11/2022
1516
5/12/2022
1527
-30
-7.5
X
A-4 Ambient (SE)
6LO837
22217
5/11/2022
1520
5/12/2022
1505
-30
-5
X
SS-1 Storage (SW)
1 L1950
23394
5/12/2022
2242
5l12/2022
2249
30
-5
41,
SS-2 Main Laundry
1 L 2838
23309
5112/2022
2020
5/12/2022
2028
-29
-5
X
rlr
SS-3 Main Laundry
1 L 3070
23730
5/12/2022
2124
5/12/2022
2131
-30
-5
X
/a
SS-4 Main Laundry
1 L 1912
23310
5/12/2022
2052
5/1212022
2100
-29.5
-4
X
SS-5 Main Laundry
1 L 1560
25270
5/1212022
1909
5112/2022
1916
-30
-5
X
o
SS-6 Main Laundry
I 3154
24527
5112/2022
1947
5112/2022
1954
-30
-5
X
i.i ..
SS-6 Dup Main Laundry
1 L 2272
24255
X
\LIB
SS-7 St or a (SE)
1L 1939
23930
5/12/2022
1813
5/12/2022
1823
-30
-5
X
t il')
SS-8 Ironing/Sorting (NW)
I 3320
24549
5/12/2022
2147
5/12/2022
2153
-30
-5
X
SS-9 Storage (SW)
1L3877
24691
5/12/2022
2212
5 412�2022.-.'-
....-, 18
-29
-5
X
Relinquishe Sign ure/ ili i )r-
Date/
Time
fZeived
by: (Signature/Affiliation)
Date
Time
by: (SignaturAliatio
DateTimeRecaiv4d
by: (Sign ature/Affiliation)
D
TimeRelinquished
Relinquished by: (Signature/Affiliation)
Date
Time
Received by: (Signature/Affiliation)
Date
Time
Lab Use O
Shipper Name: FedEx
Custody Seals Intact?
Yes No No
Sample Transportation Notice: Relinquishing signature on this document indicates that samples are shi ompliance with all applicable local, State, Federal, and international laws, regulations, and
ordinances of any kind. Relinquishing signature also indicates agreement to hold harmless, defend, and indemnify Eurofins Air Toxics against any claim, demand, or action, of any kind, related to the collection,
handling, of shipping of samples. D.O.T Hotline [phone]
N
N
O
N
N
s
ti
N
O
rl-
(D
0)
to
a_

Site -Specific Chemicals
•CAS
of Concern L LM
1,2,4-Trimethyl benzene
95636
Residential
IndoorIndoor
(ug/m3) (ug/m3)
4.2E+02 1.3E+01
Non -Residential
(ug/m3) (ug/m3)
5.3E+03 5.3E+01
•
Eurofins
.D
2.4
•
(Sp)-Eurofins
.D
AM
0.49
1,3,5-Trimethylbenzene
108678
4.2E+02
1.3E+01
5.3E+03
5.3E+01
2.4
0.49
1,4-Dioxane
123911
1.9E+01
5.6E-01
2.5E+02
2.5E+00
7.2
0.36
2-Butanone (MEK)
78933
3.5E+04
1.0E+03
4.4E+05
4.4E+03
5.9
1.5
4-Ethyltoluene
622968
---
---
---
---
2.4
0.49
4-Methyl-2-pentanone (MIBK)
108101
2.1E+04
6.3E+02
2.6E+05
2.6E+03
2
0.41
Acetone
67641
---
---
---
---
12
2.4
Benzene
71432
1.2E+01
3.6E-01
1.6E+02
1.6E+00
1.6
0.16
Chloroform
67663
4.1E+00
1.2E-01
5.3E+01
5.3E-01
2.4
0.098
Dichlorodifluoromethane (Freon 12)
75718
7.0E+02
2.1E+01
8.8E+03
8.8E+01
2.5
0.25
Ethanol
64175
---
---
---
---
9.4
1.9
Ethyl Acetate
141786
4.9E+02
1.5E+01
6.1E+03
6.1E+03
7.2
1.8
Ethylbenzene
100414
3.7E+01
1.1E+00
4.9E+02
4.9E+00
2.2
0.087
Heptane
142825
2.8E+03
8.3E+01
3.5E+04
3.5E+02
2
2
Hexane
110543
4.9E+03
1.5E+02
6.1E+04
6.1E+02
1.8
1.8
Isopropanol
67630
1.4E+03
4.2E+01
1.8E+04
1.8E+02
4.9
2.4
Naphthalene
91203
2.8E+00
8.3E-02
3.6E+01
3.6E-01
5.2
0.26
Styrene
100425
7.0E+03
2.1E+02
8.8E+04
8.8E+02
2.1
0.42
Tetrachloroethylene
127184
2.8E+02
8.3E+00
3.5E+03
3.5E+01
3.4
0.14
Toluene
108883
3.5E+04
1.0E+03
4.4E+05
4.4E+03
1.9
0.19
Trichloroethylene
79016
1.4E+01
4.2E-01
1.8E+02
1.8E+00
2.7
0.11
Trichlorofluoromethane (Freon 11)
75694
---
---
---
---
2.8
0.56
Xylene, m&p
108383/106423
7.0E+02
2.1E+01
8.8E+03
8.8E+01
2.2
0.17
Xylene, o-
95476
7.0E+02
2.1E+01
8.8E+03
8.8E+01
2.2
0.087
Notes: 5.2 Shaded cells denote analytes that have screening levels that are below lab RLs.
PLEASE REPORT NAPHTHALENE RESULTS ON ALL ANALYSES WITH J-FLAG TO
THE MDL.
--- The NC screening level has been vacated for this compound since the initial sampling
was done in 2020. These analytes can be omitted from the site -specific compound
list for these analyses.

RDFr \1
Environmental Consulting
4012 Ridgebrook Bluffs Dr. I Raleigh, NC 27603
[phone] 1 [e-mail]
APPENDIX C
VI RISK ANALYSIS
NCDEQ RISK CALCULATOR RESULTS

North Carolina Department of Environmental Quality
Risk Calculator
Version Date:
January 2022
Basis:
November 2021 EPA RSL Table
Site Name:
National Linen Service Site (parcel R05413-040-002-000).
Site Address:
1315 South 5th Avenue in Wilmington, New Hanover County, NC
DEQ Section:
Brownfields Program
Site ID:
NCBP Project No: 24028-20-065
Exposure Unit ID:
Submittal Date:
6/17/2022
Prepared By:
Rob Hill
RDH Environmental Consulting
Reviewed B
North Carolina DEQ Risk Calculator

Table of Contents
Version Date: January 2022
Basis: November 2021 EPA RSL Table
Site ID: NCBP Project No: 24028-20-065
Exposure Unit ID:
Form No.
Description
Check box
if included
DATA INPUT SHEETS
Input Section 1 - Exposure Pathways & Parameters
Input Form I
Complete Exposure Pathways
121
Input Form I
Exposure Factors and Target Risks
❑
Input Form 1 C
Contaminant Migration Parameters
❑
Input Form I
Sample Statistics
❑
Input Section 2 - Exposure Point Concentrations
Input Form 2A
Soil Exposure Point Concentration Table
❑
Input Form 213
Groundwater Exposure Point Concentration Table
❑
Input Form 2C
Surface Water Exposure Point Concentration Table
❑
Input Form 21)
Soil Gas Exposure Point Concentration Table
ID
Input Form 2E
Indoor Air Exposure Point Concentration Table
El
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Form I
Risk for Individual Pathways
ID
Output Form 113
Sitewide Risk
121
Output Section 2 - Direct Contact Soil and Groundwater Calculators
Output Form 2A
Resident Soil
❑
Output Form 213
Resident Groundwater Use
❑
Output Form 2C
Non -Residential Worker Soil
❑
Output Form 21)
Non -Residential Worker Groundwater Use
❑
Output Form 2E
Construction Worker Soil
❑
Output Form 2F
Recreator/Trespasser Soil
❑
Output Form 2G
Recreator/Tres asser Surface Water
❑
Output Section 3 - Vapor Intrusion Calculators
Output Form 3A
Resident Groundwater to Indoor Air
❑
Output Form 313
Resident Soil Gas to Indoor Air
Output Form 3C
Resident Indoor Air
ID
Output Form 31)
Non -Residential Worker Groundwater to Indoor Air
❑
Output Form 3E
Non -Residential Worker Soil Gas to Indoor Air
O
Output Form 3F
Non -Residential Worker Indoor Air
ID
Output Section 4 - Contaminant Migration Worksheets
Output Form 4A
Soil to Groundwater - Forward Mode
❑
Output Form 413
Groundwater to Groundwater - Forward Mode
❑
Output Form 4C
Soil to Surface Water - Forward Mode
❑
Output Form 41)
Groundwater to Surface Water - Forward Mode
❑
Output Form 4E
Soil to Groundwater - Backward Mode
❑
Output Form 4F
Groundwater to Groundwater - Backward Mode
❑
Output Form 4G
Soil to Surface Water - Backward Mode
❑
Output Form 4H
Groundwater to Surface Water - Backward Mode
❑
North Carolina DEQ Risk Calculator

Version Date: January 2022
Basis: November 2021 EPA RSL Table
Site ID: NCBP Project No: 24028-20-065
Exposure Unit ID:
Description of Exposure Point Concentration Selection:
Collection of 10 concurrent sub -slab soil gas samples from nine (9) locations using batch certified 1-L Summa canisters:
-Three (3) sub -slab soil gas samples from within the building at same locations of prior RSGSL exceedances in 2020 -Four (4) sub -slab soil gas samples in the vicinity of the prior RSGSL exceedance for TCE in the Main Laundry area
-One (1) sub -slab soil gas sample within Ironing & Laundry Sorting area (at north end of 5th Avenue) -One (1) sub -slab soil gas sample in the vicinity of the UST pit with contaminated groundwater (at south end of 5th Avenue)
-10-minute flow regulators -One (1) duplicate sample using a stainless -steel tee
-Total of 10 TO-15 standard lab analyses (site -specific analyte list
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
If the chemical list is changed from a prior calculator run, remember to select "See Ali Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
Exposure Point
Minimum
Maximum
Location of
Range of
Concentration
Screening
Potential
Potential
Rationale for
Concentration
Notes:
CAS Number
Chemical
Concentration
Concentration
Units
Maximum
Detection
Detection
Used for
Background
Toxicity Value
ARAR/'I'BC
ARAR/'I'BC
COPC Flag
Selection or
3
(ug/m)
(Qualifier)
(Qualifier)
Concentration
Frequency
Limits
Screening
Value
(Screening
Value
Source
(Y/N)
Deletion
Level) (n/c)
280
67-66-3
Chloroform
8.9
280
ug/m3
SS-5
/9 locations + dul
4.4 - 5.1
550
75-71-8
Dichlorodifluoromethane
13
550
ug/m3
SS-7
/9 locations + dul
4.5 - 5.2
5.9
110-54-3
Hexane, N-
5.9
5.9
ug/m3
SS-5
1/9locations
3.5
160
67-63-0
Iso ro anol
17
160
ug/m3
SS-9
/9locations (+ du
8.9-10
36
78-93-3
Methyl Ethyl Ketone (2-Butanone)
22
36
ug/m3
SS-9
9 locations (met d
12
7.6
108-10-1
Methyl Isobutyl Ketone (4-meth 1-2- entanone)
4.4
7.6
ug/m3
SS-9
2/10 locations
4 - 4.1
140
127-18-4
Tetrachloroethylene
7
140
ug/m3
SS-9
/9 locations + dul
6.6 - 7.1
6.7
108-88-3
Toluene
4.2
6.7
ug/m3
SS-7
/9 locations + dul
3.4 - 4
83
79-01-6
Trichloroethylene
7.4
83
ug/m3
SS-5
/9 locations + dul
4.9 - 5.6
16
95-63-6
Trimeth lbenzene, 1,2,4-
16
16
ug/m3
SS-9
1/9locations
4.9
7.7
108-67-8
Trimethylbenzene, 1,3,5-
7.7
7.7
ug/m3
SS-9
1/9locations
4.9
6
108-38-3
X lene, m-
3.9 (.I)
6
ug/m3
SS-2
4/9 locations
4 - 4.3
6
106-42-3
Xylene, p-
3.9 (.n
6
ug/m3
SS-2
4/9 locations
4 - 4.3
North Carolina DEQ Risk Calmlalor

,ion Date: January 2022
s: November 2021 EPA RSL Table
ID: NCBP Project No: 24028-20-065
osure Unit ID:
Description of Exposure Point Concentration Selection:
Collection of four (4) 24-hour air samples using individually certified 6-L Summa canisters:
-Three (3) indoor air samples from within the National Linen building at locations of Sept 2020 sub -slab exceedances greater than RSGSLs
-One (1) ambient air (control) sample obtained outside the building (upwind) and within parcel R05413-040-002-000
•24-hour flow regulators
-Total of four (4) EPA Method TO-15 SIM/Hi-Lo level lab analyses for site -specific analyte list compounds
Note: Chemicals highlighted in orange are non-volatile chemicals. Risks are calculated for these chemicals if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are likely not associated with vapor intrusion.
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 calculations
Exposure Point
Minimum
Maximum
Location of
Range of
Concentration
Screening
Potential
Potential
Rationale for
Concentration
Notes:
CAS Number
Chemical
Concentration
Concentration
Units
Maximum
Detection
Detection
Used for
Background
Toxicity Value
ARAR/'I'BC
ARAR/'I'BC
COPC Flag
Selection or
3
(ug/m)
(Qualifier)
(Qualifier)
Concentration
Frequency
Limits
Screening
Value
(Screening
Value
Source
(Y/N)
Deletion
Level) (n/c)
0.34
71-43-2
Benzene
0.29
0.34
ug/m3
A-3 SE Storage
4/4 locations
0.22 - 0.24
0.082
J Flag, estimated
67-66-3
Chloroform
0.067
0.082
ug/m'
A-3 SE Storage
4/4 locations
0.13 - 0.14
2.3
75-71-8
Dichlorodifluoromethane
2.2
2.3
ug/m3
A-2, A-4
4/4 locations
0.34 - 0.36
0.51
123-91-1
Dioxane, 1,4-
0.51
0.51
ug/m3
-2 Main Laundry
1/4locations
0.5
0.49
100-41-4
Ethylbenzene
0.34
0.49
ug/m3
A-3 SE Storage
4/4 locations
0.12 - 0.13
0.37
J Flag, estimated
110-54-3
Hexane, N-
0.27
0.37
ug/m3
-2 Main Laundry
4/4 locations
2.4 - 2.6
3.3
J Flag, estimated
67-63-0
Isopropanol
1.1
3.3
ug/m3
A-4 Ambient
4/4 locations
3.3 - 3.6
0.81
J Flag, estimated
78-93-3
Methyl Ethyl Ketone (2-Butanone)
0.47
0.81
ug/m'
A-3 SE Storage
4/4 locations
2.0 - 2.2
0.26
J Flag, estimated
91-20-3
-Naphthalene
0.22
0.26
ug/m3
A-3 SE Storage
4/4 locations
0.36 - 0.39
0.033
J Flag, estimated
127-18-4
Tetrachloroeth lene
0.025
0.033
ug/m3
-2 Main Laundry
4/4 locations
0.18 - 0.20
2.2
108-88-3
Toluene
1.7
2.2
ug/m'
-2 Main Laundry
4/4 locations
0.26 - 0.28
0.96
95-63-6
Trimeth lbenzene, 1,2,4-
0.71
0.96
ug/m3
-2 Main Laundry
4/4 locations
0.67 - 0.73
0.2
J Flag, estimated
108-67-8
Trimethylbenzene, 1,3,5-
0.16
0.2
ug/m'
A-1 SW Storage
3/4 locations
0.67 - 0.73
2.2
108-38-3
X lene, m-
1.6
2.2
ug/m'
A-2, A-3
4/4 locations
0.24 - 0.26
0.59
95-47-6
Xylene, o-
0.43
0.59
ug/m'
A-3 SE Storage
4/4 locations
0.12 - 0.13
2.2
106-42-3
X lene, -
1.6
2.2
ug/m'
A-2, A-3
4/4 locations
0.24 - 0.26
North Carolina DEQ Risk Calmlalor

Complete Exposure Pathways
I a WITTriMMIN
Version Date: January 2022
Basis: November 2021 EPA RSL Table
Site ID: NCBP Project No: 24028-20-065
Exposure Unit ID:
Note: Risk output will only be calculated for complete exposure pathways.
Receptor
Pathway
Check box if
pathway
complete
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Soil
❑
Groundwater Use
❑
Non -Residential Worker
Soil
❑
Groundwater Use
❑
Construction Worker
Soil
❑
Recreator/Trespasser
Soil
❑
Surface Water
❑
VAPOR INTRUSION PATHWAYS
Resident
Groundwater to Indoor Air
❑
Soil Gas to Indoor Air
0
Indoor Air
0
Non -Residential Worker
Groundwater to Indoor Air
❑
Soil Gas to Indoor Air
0
Indoor Air
0
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Source Soil
❑
Source Groundwater
❑
Surface Water
Source Soil
❑
Source Groundwater
❑
North Carolina DEQ Risk Calculator

Risk for Individual Pathways
rim
Version Date: January 2022
Basis: November 2021 EPA RSL Table
7
Site ID: NCBP Project No: 24028-20-065
Exposure Unit ID:
DIRECT CONTACT SOIL AND WATER CALCULATORS
Receptor
Pathway
Risk Carcinogenic
Hazard Index
Risk exceeded`.,
Resident
Soil
NC
NC
NC
NC
Groundwater Use*
NC
NC
Non -Residential Worker
Soil
NC
NC
NC
Groundwater Use*
NC
NC
NC
Construction Worker
Soil
NC
NC
NC
Recreator/Trespasser
Soil
NC
NC
NC
Surface Water*
NC
NC
NC
VAPOR INTRUSION CALCULATORS
Receptor
Pathway
CarcinogenicRisk
Hazard Index
Risk exceeded?
Resident
Groundwater to Indoor Air
NC
NC
NC
Soil Gas to Indoor Air
7.4E-05
1.6E+00
YES
Indoor Air
3.0E-06
1.3E-01
NO
Non -Residential Worker
Groundwater to Indoor Air
NC
NC
NC
Soil Gas to Indoor Air
5.6E-06
1.2E-01
NO
Indoor Air
6.8E-07
3.2E-02
NO
CONTAMINANT MIGRATION CALCULATORS
Pathway
Source
Target Receptor Concentrations Exceeded?
Groundwater
Source Soil
Exceedence of 21, at Receptor?
NC
Source Groundwater
Exceedence of 21, at Receptor?
NC
Surface Water
Source Soil
Exceedence of 2B at Receptor?
NC
Source Groundwater
Exceedence of 2B at Receptor?
NC
Notes:
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.
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the NC
213 Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk -based
closure.
3. NM = Not Modeled
4. NC = Pathway not calculated
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2022
Basis: November 2021 EPA RSL Table
Site ID: NCBP Proiect No: 24028-20-065
Exposure Unit ID:
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
3
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
T'HQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-66-3
Chloroform
280
8.4
1.2E-01
2.0E+01
6.9E-05
8.2E-02
75-71-8
Dichlorodifluoromethane
550
16.5
2.1E+01
1.6E-01
110-54-3
Hexane, N-
5.9
0.177
1.5E+02
2.4E-04
67-63-0
Iso ro anol
160
4.8
4.2E+01
2.3E-02
78-93-3
Methyl Ethyl Ketone (2-Butanone)
36
1.08
1.0E+03
2.1E-04
108-10-1
Methyl Isobutyl Ketone (4-meth 1-2- entanone)
7.6
0.229
6.3E+02
7.3E-05
127-18-4
Tetrachloroeth lene
140
4.2
1.1E+01
8.3E+00
3.9E-07
1.0E-01
108-88-3
Toluene
6.7
0.201
1.0E+03
3.9E-05
79-01-6
Trichloroeth lene
83
2.49
4.8E-01
4.2E-01
5.2E-06
1.2E+00
95-63-6
Trimeth lbenzene, 1,2,4-
16
0.48
1.3E+01
7.7E-03
108-67-8
Trimeth lbenzene, 1,3,5-
7.7
0.231
1.3E+01
3.7E-03
108-38-3
X lene, m-
6
0.18
2.1E+01
1.7E-03
106-42-3
X lene, -
6
0.18
2.1E+01
1.7E-03
Cumulative: I 7.4E-05 I 1.6E+00
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Resident Indoor Air r
Version Date: January 2022
Basis: November 2021 EPA RSL Table ML
Site ID: NCBP Proiect No: 24028-20-065
Exposure Unit ID:
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate
carcinogenic risk or hazard quotient. Lead concentrations are compared to the National Ambient Air Quality Standard of 0.15 µg/m3.
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Risks are calculated for these values
if indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these
chemicals are likely not associated with vapor intrusion.
All concentrations are in ue/m3
CAS #
Chemical Name:
Indoor Air
Concentration
a
(ug/m)
Target Indoor
Air Cone. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Cone. for Non-
Carcinogens @
'THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
71-43-2
Benzene
0.34
3.6E-01
6.3E+00
9.4E-07
1.1E-02
67-66-3
Chloroform
0.082
1.2E-01
2.0E+01
6.7E-07
8.0E-04
75-71-8
Dichlorodifluoromethane
2.3
2.1E+01
2.2E-02
123-91-1
Dioxane, 1,4-
0.51
5.6E-01
6.3E+00
9.1E-07
1.6E-02
100-41-4
Ethylbenzene
0.49
1.1E+00
2.1E+02
4.4E-07
4.7E-04
110-54-3
Hexane, N-
0.37
1.5E+02
5.1E-04
67-63-0
Isopropanol
3.3
4.2E+01
1.6E-02
78-93-3
Methyl Ethyl Ketone (2-Butanone)
0.81
1.0E+03
1.6E-04
91-20-3
-Naphthalene
8.3E-02
6.3E-01
127-18-4
Tetrachloroethylene
0.033
1.1E+01
8.3E+00
3.1E-09
7.9E-04
108-88-3
Toluene
2.2
1.0E+03
4.2E-04
95-63-6
Trimethylbenzene, 1,2,4-
0.96
1.3E+01
1.5E-02
108-67-8
Trimethylbenzene, 1,3,5-
0.2
1.3E+01
3.2E-03
108-38-3
Xylene, m-
2.2
2.1E+01
2.1E-02
95-47-6
Xylene, o-
0.59
2.1E+01
5.7E-03
106-42-3
Xylene, p-
2.2
2.1E+01
2.1E-02
Cumulative: I 3.0E-06 I1.3E-0 l
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air Emma
Version Date: January 2022
Basis: November 2021 EPA RSL Table
Site ID: NCBP Project No: 24028-20-065
Exposure Unit ID:
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-66-3
Chloroform
280
2.8
5.3E-01
8.6E+01
5.3E-06
6.5E-03
75-71-8
Dichlorodifluoromethane
550
5.5
8.8E+01
1.3E-02
110-54-3
Hexane, N-
5.9
0.059
6.1E+02
1.9E-05
67-63-0
Iso ro anol
160
1.6
1.8E+02
1.8E-03
78-93-3
Methyl Ethyl Ketone 2-Butanone
36
0.36
4.4E+03
1.6E-05
108-10-1
Methyl Isobutyl Ketone 4-meth 1-2- entanone
7.6
0.076
2.6E+03
5.8E-06
127-18-4
Tetrachloroeth lene
140
1.4
4.7E+01
3.5E+01
3.0E-08
8.0E-03
108-88-3
Toluene
6.7
0.067
4.4E+03
3.1E-06
79-01-6
Trichloroeth lene
83
0.83
3.0E+00
1.8E+00
2.8E-07
9.5E-02
95-63-6
Trimeth lbenzene,1,2,4-
16
0.16
5.3E+01
6.1E-04
108-67-8
Trimeth lbenzene, 1,3,5-
7.7
0.077
5.3E+01
2.9E-04
108-38-3
X lene, m-
6
0.06
8.8E+01
1.4E-04
10642-3
X lene, -
6
0.06
8.8E+01
1.4E-04
Cumulative: I 5.6E-06 I 1.2E-0 l
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Indoor Air r
Version Date: January 2022
Basis: November 2021 EPA RSL Table
Site ID: NCBP Project No: 24028-20-065
EXDOSure Unit ID:
** - Note that the EPA has no consensus on reference dose or cancer slope factor values for lead, therefore it is not possible to calculate carcinogenic
risk or hazard quotient. Lead concentrations are compared to the National Ambient Air Quality Standard of 0.15 µg/m3.
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Risks are calculated for these values if
indoor air concentrations are entered and indoor air screening levels have been established, but it should be noted that detections of these chemicals are
likely not associated with vapor intrusion.
All concentration, are in nv/m3
CAS #
Chemical Name:
Indoor Air
Concentration
3
(ug/m)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
71-43-2
Benzene
0.34
1.6E+00
2.6E+01
2.2E-07
2.6E-03
67-66-3
Chloroform
0.082
5.3E-01
8.6E+01
1.5E-07
1.9E-04
75-71-8
Dichlorodifluoromethane
2.3
8.8E+01
5.3E-03
123-91-1
Dioxane, 1,4-
0.51
2.5E+00
2.6E+01
2.1E-07
3.9E-03
100-41-4
Eth lbenzene
0.49
4.9E+00
8.8E+02
1.0E-07
1.1E-04
110-54-3
Hexane, N-
0.37
6.1E+02
1.2E-04
67-63-0
Iso ro anol
3.3
1.8E+02
3.8E-03
78-93-3
Methyl Ethyl Ketone 2-Butanone
0.81
4.4E+03
3.7E-05
91-20-3
-Naphthalene
3.6E-01
2.6E+00
127-18-4
Tetrachloroeth lene
0.033
4.7E+01
3.5E+01
7.0E-10
1.9E-04
108-88-3
Toluene
2.2
4.4E+03
1.0E-04
95-63-6
Trimeth lbenzene, 1,2,4-
0.96
5.3E+01
3.7E-03
108-67-8
Trimeth lbenzene, 1,3,5-
0.2
5.3E+01
7.6E-04
108-38-3
X lene, m-
2.2
8.8E+01
5.0E-03
95-47-6
X lene, o-
0.59
8.8E+01
1.3E-03
10642-3
X lene, -
2.2
8.8E+01
5.0E-03
Cumulative: I 6.8E-07 3.2E-02
North Carolina DEQ Risk Calculator