17046_WLewisSt_AWP_20211027

Pyramid Environmental & Engineering, P.C. Project #2021-132
Model Linen — W. Lewis Street
SUB -SLAB VAPOR (SSV) ASSESSMENT WORK PLAN
MODEL LINEN & WEST LEWIS STREET BROWNFIELDS PROJECTS
109, 111, 117-B1, & 120 W. LEWIS STREET
GREENSBORO, NC (GUILFORD COUNTY)
Brownfields Site Name : # 17046-13-041 : West Lewis Street BFA
Brownfields Site Name: # 08007-04-041 : Model Linen BFA
Work Plan Prepared for: Az Development, LLC
Andy Zimmerman
111 W. Lewis Street, Greensboro, NC 27401
Email : [e-mail]
azdev.biz
Phone : [phone]
Jr I INS _- ---
PYRAMID
ENIARQNMENTAL & ENGINEERING, P.C.
Work Plan Version: Version 2.3
Date Prepared : 10-27-2021
Work Plan Submitted to: BP Project Manager : Ms. Sharon Poissant Eckard, PG
NCDEQ-DWM - Brownfields Program
1646 Mail Service Center, Raleigh, NC 27699-1646
Email: Sharon. Eckard@ncdenr_gov
Phone : [phone]
Work Plan Prepared By:
qr),r�'J.C,
Michael G. Jones, PG
License #1168
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G A OINt '
PYRAMID ENVIRONMENTAL & ENGINEERING, P.C. rfrrltti��
503 INDUSTRIAL AVE., GREENSBORO, NC 27406
Email: [e-mail]
Phone: [phone]
IL NC Geology License C-257 NC Engineering License C-125
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 1
Pyramid Environmental & Engineering, PC-202I-132 10-27-2021

Table of Contents
1.0 Introduction
1
1.1 NCDEQ Requested Work 3
1.2 Brownfields Receptor Survey 6
1.3 Soil Assessment 6
1.4 Groundwater Assessment 6
1.5 Sub -Slab Vapor Sampling 6
1.6 Data
7
2.0 Scope of Work 8
3.0 Sampling Methodology 9
3.1 SSV Sampling Methodology 10
3.2 Indoor Air Sampling Methodology 11
3.3 Crawlspace Sampling Methodology 12
4.0 Laboratory Analyses 12
5.0 Quality Assurance / Quality Control Procedures 13
6.0 Investigation Derived Waste 14
7.0 Reporting 14
8.0 Work Plan Closing 15
Figure 1 - Topographic Map
Figure 2 - Property Location Aerial Map
Figure 3 - Site Aerial Showing 2014 Assessment Results
Figure 4 - Estimated Groundwater Flow Direction
Figure 5 - Aerial Map with Proposed Sample Locations
Figure 6 - Locations of CS Samples at 109 — 111 W. Lewis Street
Figure 7 - Locations of SSV Samples at 115 — 117 W. Lewis Street
Figure 8 - Locations of CS Samples at 117 B-1 W. Lewis Street
Figure 9 - Locations of SSV Samples at 120 W. Lewis Street
Table 1 through 4 (in Text)
Attachment A : NCDEQ Brownfields Letter (03-26-2021)
Attachment B : Site History, Phase II ESA, and 2014 Assessment Results
Attachment C : Site Photos, Sanborn Map 1950, map of Foundation Types
Attachment D : Vapor PinTI Product Brochure, Installation instructions, and leak check procedure
Attachment E : TO-15 Method Reporting Limits for Pace Analytical
Attachment F : Pace TO-15 Air Sampling Procedures
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 2
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

1.0 Introduction
On behalf of AZ Development, Pyramid Environmental & Engineering, PC (Pyramid) reviewed the
NCDEQ letter date March 26, 2021, requesting additional vapor assessment at the referenced
Brownfield site addresses. The NCDEQ letter is presented in Attachment A for your reference.
The NC Brownfields Program (NCBP) requested a Work Plan to provide the NCDEQ with details
of the proposed sub -slab vapor (SSV) and crawl space (CS) vapor assessment requested by the
Department. The site assessment history is summarized in this work plan with applicable
sampling details. This SSV Assessment Work Plan is being submitted while efforts are underway
to merge the Brownfield agreements for the following two Brownfields sites :
• # 17046-13-041 : The West Lewis Street BFA is being written to combine the West Lewis
Street site with the Model Linen Brownfields Site.
• # 08007-04-041 : The Model Linen BFA was previously recorded, and review of the
document showed that changes were necessary to the Brownfields Plat.
The combination of the two sites into one Brownfields Agreement (BFA) is proposed. As far as
was reported, there has not been involvement of the DSCA program. The SSV Assessment Work
Plan will address the NC Brownfields Program concerns about possible vapor intrusion from
solvent or volatile organic contamination. The SSV/CS analytical results will provide additional
information for evaluation, will fill a "data gap" , and will allow completion of the BFA. The
following table presents the property information for the two sites.
Table 1— Property Use Summary
NCBP Project #
Address
Parcel #
Acreage
Former Use
REC
Current Use
17046-13-041
109-111 W. Lewis
7864-63-1801
0.24
Furniture Store
PCE & TCE in GW
Pub & Office Spaces
(W. Lewis BF)
115-117 W. Lewis
7864-53-9880
0.48
Dry Cleaners
PCE & TCE in GW
Pub, Brewery, distillery
08007-04-041
120 W. Lewis St.
7864-64-0041
0.50
Former Laundry
PCE & TCE in GW
Arcade, Pub, Storage
(Model Linen)
As requested by the NC Brownfield Program (NCBP), this brief summary of the site history was
completed as part of the SSV Work Plan. Pyramid met with the building owner at the properties
to access each building areas and review what is known about the foundations. The buildings
have differing foundation types that will affect the collection of vapor samples.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 3
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

1.1 NCDEQ Requested Work
The NC Brownfields Program requested additional sub -slab vapor data for both the Model Linen
and West Lewis Street properties based on the detection of Benzene, Naphthalene, PCE, TCE,
and 1-Methyl naphthalene in groundwater at 120 Lewis Street (MW-3). There was a detection of
Trichloroethylene (TCE) in the groundwater at MW-3 (1.2 µg/L) on the Model Linen site. Based
on these VOC detections, the NCDEQ determined that there was a "data gap" for sub -slab vapor
data. The historical data from one sub -slab sample collected in 2014 in the southeast area of 109
W. Lewis indicated a low concentration of TCE and other volatile organic compounds (VOCs),
including the daughter products of TCE, which were present in the 2014 SSV sample. The VOCs
include chlorinated compounds that are considered contaminants of concern (COCs).
Brownfields requested SSV/CS sampling in the buildings to assess vapor intrusion risk. The NCDEQ
Brownfields Program letter requesting the work is presented in Attachment A. The detailed site
history prepared in 2014 during a Phase II ESA is included in Attachment B.
At this time, no new structures or foundation changes are planned. The current property uses
include several pubs with food service, a craft brewery, a distillery, offices, storage, and a video
game arcade. The property uses will remain consistent with the current use for the foreseeable
future, and no new construction or residential uses are planned.
Planning for the SSV sampling began with a site visit and interview with the building owner and
a few of the current occupants. The buildings have structural walls separating the building areas,
and differing foundation types. In preparing the SSV and crawl space sampling work plan, the
foundation type and wall separations were taken into consideration. The owner's information,
photographs, and maps were helpful in understanding the foundations, and are included in
Attachment C. The following Figures are provided as further explanation of the work.
Figure 1 - Topographic Map
Figure 2 - Property Location Aerial Map
Figure 3 - Site Aerial Showing 2014 Assessment Results
Figure 4 - Estimated Groundwater Flow Direction
Figure 5 - Aerial Map with Proposed Sample Locations
Figure 6 - Locations of CS Samples at 109 —111 W. Lewis Street
Figure 7 - Locations of SSV Samples at 115 —117 W. Lewis Street
Figure 8 - Locations of CS Samples at 117 B-1 W. Lewis Street
Figure 9 - Locations of SSV Samples at 120 W. Lewis Street
Table 2 describes the sampling strategy for each sample location, and the locations of the
proposed samples and sample names are described on Table 3.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 4
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

Table 2 - Address - Building Size & Foundation Descriptions
SCOPE of
During Work Plan review and discussions, the NCDEQ requested more SSV/CS locations for the SSV Study.
WORK
The NCDEQ general guidance refers to one sample per 1,000 square feet. Pyramid discussed locations
with the DEQ and the agreed upon SSV sample locations are presented on Figure 5.
The 109 W. Lewis pub is 2,697square feet of renovated space, constructed in a foundation wall with post
109 W.
and beam construction. The current floor is a thick wooden plank floor which was built using joists, a
Lewis
plywood deck, and then the 3.5 inch thick wooden plank floor. The wooden floor was constructed over a
former concrete floor, and therefore will be considered as crawlspace samples. The DEQ requested (2 )
samples which are considered crawlspace samples (CS-1 and CS-2) which are shown on Figure 6.
This area is 5,828 square feet of office space, constructed inside a foundation wall with post & beam. The
111 W.
current floor is a thick wooden floor which was built using joists, a plywood deck, and then the 3.5 inch
Lewis
thick wooden plank floor. The wooden floor was constructed over a former concrete floor and therefore
will be considered crawlspace samples. For this area, the (4 ) crawlspace vapor samples will be collected
(CS-3, CS-4, CS-5, and CS-6) at the locations shown on Figure 6.
115 W.
This area is currently the Fainting Goat Distillery which has a new concrete floor. The distillery is separated
Lewis
by a concrete block wall from the brewery to the west. The distillery is 3,666 sq. ft., and is the eastern half
Distillery
of the area the Sanborn Map indicated as "Dry Cleaner". The DEQ requires (2) SSV samples (SSV-7 and
SSV-8) as shown on Figure 7. It is possible that the new concrete slab may have been poured over the
older slab in this area; a crawlspace is not expected.
117 W.
This area is currently the South End Brewery which was also has a new concrete floor. The brewery is the
Lewis
western % of the building, and is separated from the distillery to the east by a concrete block wall. The
Brewery
brewery is 3,564 sq. ft. of the building, and is the west half of the area the Sanborn Map indicated as "Dry
Cleaner". The DEQ requires (3) SSV samples (SSV-9, SSV-10, & SSV-11) as shown on Figure 7.
117 B-1
The entire pub (3,737 sq. ft.) is constructed over a crawlspace area below the wooden floor. The DEQ
Crawlspace
requested (2) crawlspace samples (CS-11 and CS-12) as shown on Figure 8. The samples will be collected
at least 5 feet from the exterior walls and will be compared with the Indoor Air Quality VISLs.
120 W.
The Boxcar has an event space, 2 bars, and a game room covering 70 % of the area. The building is slab
Lewis Street
on grade with plumbing on the east side. The SSV points (SSV-18 through SSV-23) are shown on Figure 9,
BOXCAR
and cover the Boxcar area of 9,900 square feet with (6) SSV samples to evaluate this area.
120 Lewis
This area was not open for our inspection, and will be inspected at the start of work. The owner designated
Street
the area for office use. The area is slab -on grade construction with a NE courtyard. The 4,475 sq. ft. area
has (4) proposed SSV samples (SSV-14 through SSV-16) to evaluate the area ( see Figure 9). The small
Offices
"Courtyard" in the NE corner of the property will be investigated with SSV-15.
The SSV locations are shown on Figure 5 and described on Table 3 below.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 5
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

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Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 6
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

1.2 Brownfields Receptor Survey
The site location is in downtown Greensboro at an approximate elevation of 835 feet above mean
sea level (msl). The area is near the topographic high along West Lewis Street, and surface water
from the site appears to move to the south and southeast toward a nearby surface water stream.
The closest surface water stream is located about 1,400 feet south of the site, and flows to the
south. Although no receptor survey has been completed for the site, the site is in the center of
Greensboro and no water supply wells are expected in this area. A Brownfields Receptor Survey
will be conducted as part of this scope of work. The City of Greensboro supplies municipal water
to the properties within 1,500 feet of the site. There are no known water supply wells located on
the Brownfields properties.
1.3 Soil Assessment
Petroleum USTs were reportedly removed from south of 111 W. Lewis although no exact
location was given. In addition, a petroleum UST was reportedly removed from the southwest
corner of 120 Lewis Street. The 2014 soil assessment summarizing the previous investigations is
presented as Attachment B, and showed that the results were below IHSB PSRG levels. This
Work Plan includes no soil sampling, but rather sampling of SSV to evaluate volatile organic
compounds (VOCs) beneath the buildings.
1.4 Groundwater Assessment Summary
Previous groundwater assessment was reported and identified benzene, naphthalene, PCE, TCE,
and 1-methyl naphthalene above groundwater standards. A typical conceptual site model for the
site includes shallow groundwater between 12 to 16 below land surface (BLS), within the surficial
aquifer. The saprolite generally persists to a depth or approximately 45-55 feet and is followed by
weathered granitic rock. The bedrock in the Greensboro area is generally encountered between
65 to 85 feet below land surface, depending on differential weathering. Dissolved Constituents
of Concern (COCs) were present in the shallow aquifer zone. The potentiometric surface map is
presented as Figure 4, and the Constituents of Concern map is presented as Figure 3. These
groundwater detections prompted the NCDEQ to request the SSV sampling work plan.
1.5 Sub -Slab Vapor Sampling
The former Model Linen operated on both the north and south sides of Lewis Street at 120 Lewis
Street (north side) and 117 Lewis Street (south side). The NC Brownfields Program requested
SSV data for both the Model Linen and West Lewis Street properties. The Program requirements
are based on the detection of TCE in the groundwater at the Model Linen Site and the lack of
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 7
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

sufficient sub -slab vapor assessment data. The historical data from one sub -slab sample collected
in 2014 in the southeast area of 109 W. Lewis Street indicated a low concentration of TCE and
other VOCs, including the daughter products of TCE present in that sample. The NC Brownfields
Program requested additional SSV sampling in each of the buildings to assess vapor intrusion risk.
Future development includes no new builds on the properties, no planned residential use, nor
removal of buildings or foundations; although residential use was requested as a potential future
use in the Brownfields Agreement. Each building is connected to public utilities.
1.6 Data Gaps
The NCDEQ Brownfields Program has identified the lack of vapor data as a data gap and requires
additional SSV assessment data to be collected for the buildings at the site. The following Work
Plan summarizes the methods, procedures, and quality assurance which will be used in the
upcoming SSV assessment. After discussion with the NCDEQ, Pyramid reviewed the preliminary
NCDEQ Brownfields Program Guidance for Vapor Intrusion Assessment Work Plan and Report
Checklist (July 2021) in preparing this document. Although not all of the checklist items apply to
this site, the guidance was adhered to where appropriate.
• The property use has been established and is reported in Table 1.
• Redevelopment plans will not include new structures on the properties
• No foundation changes are proposed, and each building is connected to public utilities
• There are no basements in the buildings
• There are no elevators or enclosed stairwells in the buildings
• Parking is outside on paved surfaces and along the street
• Building square footage is report on Table 2 and is not changing
• Figure 1 - Topographic Map
• Figure 2 -
Property Aerial Location Map showing all parcels
• Figure 3 -
Site Aerial Map showing 2014 assessment results
• Figure 4 -
Estimated Groundwater Flow Direction
• Figure 5 -
Aerial Map with Proposed Sample Locations
• Figure 6 -
Locations of CS Samples at 109 —111 W. Lewis Street
• Figure 7 -
Locations of SSV Samples at 115 —117 W. Lewis Street
• Figure 8 -
Locations of CS Samples at 117 B-1 W. Lewis Street
• Figure 9 -
Locations of SSV Samples at 120 W. Lewis Street
The subsurface and crawl space sampling locations and rationale are described in Table 2 and in
Table 3 of this work plan.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 8
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

2.0 SCOPE of WORK
The work required by the Brownfields Program is to provide SSV/CS sample collection and
analysis from the structures on the sites. The locations proposed are shown on Figure 5 and Table
3 indicates the planned sampling technique. The primary tool in the sampling is the Vapor Pin TM
which is a stainless steel device which allows penetration of the concrete slab/overlying floor,
and seals to the penetration allowing a vapor sample to be collected from the air -space below
the slab. The air space below the concrete or wooden flooring systems can be accessed in this
way, and the sample locations can be left in place if repeated sampling is desired.
Additional vapor sampling procedures are listed in the following sections for each building
location and the QA/QC details are also summarized in this SSV Work Plan. No sealants or glues
will be applied to the SSV installations or leak check. The materials used will be consistent with
the planned VI sampling and observations of the site conditions at each SSV Installation will be
recorded during installation.
The proposed SSV/CS sample locations are shown on Figure 5. The SSV sampling will be
completed using Vapor PinTm devices in each sample location. The Vapor PinTm description,
installation procedures, and leak check for the device are summarized in Attachment D. The SSV
samples require penetration through the concrete or wood flooring to access the vapor space
below. Table 2 describes the building location, address, foundation type, and Table 3 describes
the sample numbers and strategy for each sample location.
These SSV / CS sample locations are shown on the site map presented as Figure 5. These samples
are to determine whether there are vapor intrusion concerns at the Brownfields Properties.
Vapor sampling will be arranged with the property owner and each tenant after NCDEQ approval
of the work plan. The business operations will make it necessary to schedule the work so that it
does not interfere with normal business. The installation work for the SSV VaporPinsTM is
expected to take two field days, and the installations will be developed, sealed, and covered with
stainless steel covers.
The sample collection will require 25 cylinders from the laboratory which may take time to
acquire. The field collection of air samples will document the conditions at each sample location,
and a duplicate sample will be collected for each field day. The work will be scheduled to be
completed in two field days and Duplicate samples are proposed at location SSV-10 (SSV-10 Dup)
and SSV-23 (SSV-23 Dup). These are the most likely areas for detections of chlorinated solvents
at the two Brownfields sites.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 9
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

3.0 SAMPLING METHODOLOGY
3.1 SSV Sampling Methodology
The SSV sampling will be completed using separate Vapor PinTm devices in each area of the site.
The timing of the SSV sampling will be scheduled within 2 weeks of SSV Work Plan Approval.
The Vapor PinTm description, general installation procedures, and leak check for the device use
are presented in Attachment D. The proposed assessment activities will be performed in general
accordance with DEQ's Inactive Hazardous Sites Branch (IHSB) Guidelines for Assessment and
Cleanup of Contaminated Sites (Guidelines) dated January 2020, the DEQ DWM Vapor Intrusion
Guidance (VI Guidance) dated March 2018, and most recent versions of the U.S. Environmental
Protection Agency (EPA) Region IV Science and Ecosystem Support Division (SESD) Field Branches
Quality System and Technical Procedures guidance. The Vapor Intrusion Assessment Checklist
will be used in preparation of the final report and is presented in Attachment E.
The SSV samples require penetration through the concrete or wood flooring to access the vapor
space below. Preparation for the VaporPinT"' installations includes:
• Procurement of the Vapor Pins & Installation Kit
• Confirm access to the sample areas with building owner and occupants
• Schedule Vapor PinT"' Installation and purging
• For thick wooden floor install, VaporPinT"I agreed the device use was appropriate
• Receive TO-15 6-Liter canisters & Teflon Tubing & Confirm condition for sampling
Pyramid plans to complete the coring and installation of the Vapor Pin TM installations prior to the
final arrangements for SSV/CS sample collection. The procedures for installation are outlined in
detail in Attachment D. Pyramid consulted VaporPinT^° about the use of the device, provided
photos of the flooring , and received and Email confirming the device is appropriate for this use.
Once the SSV sample points are installed, Pyramid will purge the entire sample train (Vapor Pin
and tubing) by extracting 5 volumes from the vapor point using the syringe and three-way valve.
After stabilization, the purge/leak check will be completed prior to sampling. The installation will
be secured with a cap and stainless steel threaded lid fastened to the top and allowed to rest for
20 minutes before sampling. No sealants will be used in the installations. Preparations for the
soil -gas sampling and analyses included the following elements:
• Arrange for volatile organic TO-15 BATCH -certified 6-liter summa canisters
• Helium gas will be used (fully Hooded) for Leak checking of all connections
• Slab / floor thickness will be recorded for each location
• The Buildings have HVAC systems that will be operated normally during sampling.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 10
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

• Samples will be completed when the buildings are unoccupied or lightly occupied.
• Soil -gas sample collection in laboratory prepared vacuum cylinders
• Connecting laboratory prepared cylinders & 200 ml/min flow control device
• Duplicate soil -gas samples will be collected concurrently with primary samples
• Packaging and FeclEx shipment of air samples in lab packaging to Pace
• Evaluation of laboratory results relative to commercial and residential VISLs
• A report of sampling, analytical data, and evaluation of data will be sent to the NCDEQ
Prior to sample collection, a leak test will be performed on each SSV/CS point by placing a shroud
around the point and sampling train including the summa cannister, saturating the air inside the
shroud with helium gas, then purging approximately three volumes from the sampling point and
tubing using a syringe and three-way valve. The 6-liter summa canister will be connected to in -
line flow controllers with the laboratory calibrated vacuum gauge. The flow controller will be
connected to the sample tubing at the soil vapor monitoring point using a brass nut and ferrule
to form an air -tight seal.
Vapor from the monitoring point sample tubing will be purged and sampled outside the shroud
into a Tedlar® Bag . A helium gas detector will be used to measure helium concentrations in the
shroud and bag. The leak test will be considered successful if the helium concentration measured
in the soil gas purged from the sampling point is less than 10% of the concentration measured in
the shroud. If the leak test is unsuccessful, measure will be taken to identify and address the
source of the leak and additional leak testing will be performed. In total, a minimum of 5 volumes
will be purged from the point prior to and during the leak test utilizing a syringe and 3-way valve.
After a successful field leak check, the vapor samples will be collected in the laboratory supplied
Summa Canisters. The Summa canisters will be batch certified for quality assurance. The vacuum
will be checked for appropriate negative pressure. If the initial vacuum prior to sampling is in
excess of 10 % lower than the vacuum recorded at sample receiving, the canister will not be used,
and a replacement will be obtained. For the 6-liter canisters, the flow regulatory will be set at
200 milliliters per minute (ml/min).
For this site, the Duplicate (SSV-10 Dup and SSV-23 Dup) will be collected concurrently with the
primary sample using a "Tee" connection within the helium hooded area. The intake valve on
each canister will be fully opened to begin sample collection. Vacuum readings will be recorded
before, during, and at the end of the sample collection. The sample collection start and ending
times will also be recorded. A vacuum of between -5 and -8 inches of vacuum will be maintained
at the end of the sample collection.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 11
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

After the sample is collected, the intake valve will be closed, and the tubing disconnected from
the canister. The starting and ending vacuum will be recorded on the Chain -of -Custody form and
submitted to the laboratory with the canisters. The canisters will be shipped in the lab provided
shipping containers under standards COC protocols to Pace Analytical Services. The sample
location will be secured and maintained in working order until the analytical results are received,
and a decision is made about additional sampling or indoor air analyses. After evaluation, a
decision will be made to remove or leave the vapor sampling point in the future.
3.2 Indoor Air Sampling Methodology
The initial sampling plans do not include any indoor air sampling locations. The crawl space
samples collected will be considered indoor air samples for comparison with the appropriate
VISLs. It is possible that indoor air samples will be necessary in the future. This work plan lists the
additional details that may be needed in the future should indoor air sample be needed.
• An inventory of chemicals within each building will be conducted if indoor air quality
samples are to be collected. The NCDEQ Indoor Air Building Survey and Sampling Form
will be completed should IAQ samples be collected.
• If compounds that are perceived to be potential interference compounds are found in
the building survey, these compounds will be removed at least 48-72 hours before the
sampling is completed.
• The schedule for IAQ sampling will be planned to minimize potential interference from
construction or renovations which may bring in new materials.
• The HVAC system will be operated normally before and during the sampling.
• IAQ samples will be collected with individually certified 6-liter Summa Cannisters
equipped with 200-ml/minute flow controller devices.
• The air intake will be elevated on a stand and the intake will be at breathing height ,
about 5 feet above the floor.
• All IAQ Samples will be collected on the ground floor in building work or public areas.
• The work will be scheduled with the building owners to limit the access of other people
to the work areas while sampling.
Since no IAQ samples are indicated, these sampling methods are proposed for future use.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 12
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

3.3 Crawl Space Sampling Methodology
This sampling work plan includes crawl space sample locations designated CS-12 and CS-13.
Samples CS-1 through CS-6 will be collected below a substantial 4 inch thick wooden floor, and
are considered crawl space samples. Sampling procedures will include :
• Under 117 B-1 Lewis Street, the crawl space has a dirt floor and no moisture barrier
• The ceiling of the crawl space is wooden joists and a wooden floor below a Pub
• The crawl space has 4 foundation vents and a small access door on the western wall
• Crawl space height varying from 30 inches to less than 10 inches for CS-12 and CS-13.
• There is a perimeter concrete wall and foundation piers in the crawl space area
• For CS-1 through CS-6, the thick wooden floor will be penetrated with VaporPinsT"^
The timing of the SSV and crawl space sampling will be scheduled to begin within 2 weeks of SSV
Work Plan Approval.
4.0 Laboratory Analyses
The analytical laboratory selected for the project is Pace Analytical Services. The air sample
analytical method selected is TO-15 for Volatile Organic Compounds (VOCs) with the full list of
compounds (excluding Acrolein) and including naphthalene reported for the initial analyses.
Pyramid reviewed the method Reporting Limits (RLs) and method detection limits (MDLs) for TO-
15 for the target paramete rs/COCs. The RLS are within the range required to determine the VISLs
for each of the target parameters. The detection and reporting limits were well below the
regulatory residential VISL levels. The analytical method TO-15 RLs for the method are presented
in Attachment F.
Pace Analytical Services will prepare the sample containers and batch certify the evacuated
cylinders with flow control devices installed limiting flow to 200 ml/min. The cylinders will be
inspected before use, and if the vacuum prior to sampling is 10% lower than the vacuum
documented by the laboratory upon shipment, then the cannister is considered compromised
and will not be used. The sample collection methods used in the field will comply with the
instructions given by the analytical laboratory. The personnel performing the sampling and
collecting data at the site are qualified by education, training, and experience. The sample start
and end time will be recorded on the Chain -of -Custody for the site. The starting and ending
vacuum in each canister will be recorded on the chain -of -custody and submitted to the laboratory
along with the samples.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 13
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

5.0 Quality Assurance / Quality Control Procedures
Pyramid plans to collect 23 primary vapor samples and two duplicate SSV/CS space samples.
The primary and duplicate samples (SSV-10 & SSV-10 Dup) and (SSV-23 and SSV-23 Dup) will be
collected using a brass "Tee" connection between the two samples. These two samples will be
collected concurrently, and the analyses used for comparative purposes. Pyramid will review the
Laboratory Level II report from Pace Analytical for quality assurance. The laboratory QA/QC
procedures will be used to ensure appropriate sample handling and analysis and help with the
review of the analytical data and data validation. QA/QC Procedures will be conducted in
accordance with the method protocols and will include regular equipment maintenance,
equipment calibrations, and adherence to specific sample custody and data management
procedures. Samples will be analyzed in conjunction with appropriate blanks, lab duplicates,
continued calibration standards, surrogate standards, and matrix spike standards in accordance
with approved methodologies to monitor both instrument and analyst performance. Laboratory
reporting limits for each analyte will be at or below appropriate screening criteria, where
possible.
The Summa canisters be packaged and shipped to the laboratory under standard chain of custody
protocols for analysis of VOCs by EPA Method TO-15. The sample cylinders will be checked when
received by Pace Analytical Services and inspected. The cylinders vacuum readings will be
recorded by Pace and compared to the vacuum remaining at the end of the test. The cylinders
will be analyzed using TO-15 Method for VOCs and naphthalene, and the results will be checked
for accuracy.
The NC Brownfields Program requests that the laboratory review the data and report values that
are above the Method Detection Limits (MDLs) and below the Reporting Limits (RLs) for TO-15 as
'T' flag for estimated concentrations. The TO-15 data will be reviewed for comparative results
between the primary and duplicate samples to determine if the comparative results are
acceptable. The laboratory report of the SSV air samples will be compared with the IHSB VISL
standards, and the results presented in the report with QA/QC results, and chain -of -custody
documentation.
Laboratory QA data consistent with Level II documentation will be requested for this project.
Pace Analytical Services was selected for the Lewis Street/Model Linen Site and the laboratory
contact is Ryan Brumfield [phone]. The SSV analytical data will be reviewed and compared
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 14
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

to the Residential and Non -Residential Vapor Intrusion Screening Levels (VISLs) for Sub -Slab and
Exterior Soil Gas Vapor Screening Levels (SGSLs). A final report will be prepared with the data and
submitted to the NC Brownfields Program for review within 30 days of data receipt from the
laboratory.
6.0 Investigation Derived Waste
Based on the prior data, investigation derived waste (IDW) generated during the assessment will
be minimal and should not encounter contaminated materials. If these activities encounter any
contaminated materials, they should be minimal and would be spread near the point of
generation in a thin layer. However, if significant impacts are suspected, the materials will be
containerized in 55-gallon drum and staged on -site pending analytical results of a composite IDW
sample. Based on laboratory analytical results of IDW samples, the drums will be transported off -
site to a permitted facility for disposal, if needed.
7.0 Reporting
Following completion of the assessment activities and receipt of the analytical data, Pyramid will
prepare a report documenting the vapor sampling activities, Figures showing sample locations,
laboratory data and QA/QC, a discussion of the data in comparison to regulatory screening levels,
and conclusions and recommendations based on the site history and current SG data. The report
will include applicable tables, figures, and appendices. The leak check data will be included in
the Report as a table to confirm the leak check data :
Sample
Time
Helium - Shroud
(ppm)
Helium — Tedlar
(ppm)
% Helium in
Tedlar
< 10 % helium ?
Initial
5,000 ppm
??
%
Yes / No
Middle
5,000 ppm
??
%
Yes / No
Ending
5,000 ppm
??
%
Yes / No
ppm = parts per million
Analytical data will be compared against the applicable NCDEQ screening levels. Figures will
include a north arrow, graphic scale, map legend, and other reference information. The report
will include the Pyramid Corporate license information and the individual license information,
and appropriate professional seal. The final report will be submitted to the NC Brownfields
Project Manager for review and approval, and for use in evaluating vapor intrusion risk and
developing a revised Brownfields Agreement for both properties.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 15
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

8.0 Work Plan Closing
The schedule for the work is outlined in the following table based on Work Plan Approval.
Table 4 — Proposed Schedule
Date
Activity
Description
DEQ Work Plan Approval
Schedule work
Arrange work with property owner, tenants, and legal counsel
Week 2
Install Pins
Procure & Install VaporPins'", schedule sampling, order cylinders
Weeks 3
Collect Samples
Collect primary & duplicate SSV/CS samples & ship to Laboratory
Weeks 4 & 5
Reporting
Prepare sampling report and add SSV/CS data when received
Week 6
Report to DEQ
After Review the report will be sent to NCDEQ / Brownfields
The proposed schedule will be altered if there are delays in receiving the sampling supplies from
Vapor Pin, or if the Laboratory has delays with TO-15 sample cylinders availability. These are
outside our control and will be mitigated by requesting the materials as soon as the work is
approved.
Please review this work plan and send any comments, which will be addressed quickly so that we
can move forward. Please review this work plan and provide your comments or approval to
Pyramid at email : mike@ pyramidenvironmentaLcom. If you have any questions or if you need
additional information, please call Michael G. Jones, LG at [phone], ext. 124.
Model Linen & West Lewis St. NCBP Sites - Brownfields Soil -Gas Work Plan (Version 2.3) Page 16
Pyramid Environmental & Engineering, PC-2021-132 10-27-2021

FIGURES

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PRIMARY HIGHWAY, HARD SURFACE FEET: 1• = 2000'
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Benzene: 4.7
_.* Ethylbenzene: 65.8
Naphthalene: 53.9
PCE: 13.1
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Total Xylenes: 49.8
Naphthalene: 99.9
�MEK: 30.0
MIBK: 13.2
p-Isoptopyltoluene: 23.4
* `VP-1
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■ Concentrations exceeded
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7.
LEGEND FD — Floor Drain
Soil Concentrations Are Reported in Milligrams Per Kilogram (mg/kg).
O Soil Sample Location Groundwater Concentrations Are Reported in Micrograms Per Liter (ug/L).
Soil Sample and Temporary Monitoring Sub -Slab Vapor Concentrations Are Reported in Micrograms Per Cubic Meter (ug/m3)
® Well/Groundwater Sample Location BOLD Concentrations Exceed Soil PSRGs, NCAC 2L Groundwater Standards,
or DWM Non -Residential Vapor Intrusion Screening Levels.
Sub -Slab Vapor Sample Location PSRG - Preliminary Soil Remediation Goal NS — Nest Samnleri
•Off -site Groundwater Monitoring =-Exceeds DWM Non -Residential Vapor Intrusion Groundwater Screening Level (GWSL)
Well MEK = 2-Butanone PCE = Tetrachloroethene
MIBK = 4-Meth I-2-Pentanone TCE = Trichloroethene
FIGURE 2 — SITE PLAN Source: Google Earth Scale: 1 Inch = 40 feet
N
9111 Monroe Road, Suite 175
Charlotte, North Carolina 28270 Site Name: 109 - 111 West Lewis Street
T 704.846.8853 F 704.846.3271
109 and 111 West Lewis Street
enviroassessments.com Greensboro, North Carolina
enviroassessments EA Project Number: 14-9927.2

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FIGURE 3 — POTENTIOMETRIC CONTOUR MAP Source: Google Earth Scale: 1 Inch = 40 feet
N
9111 Monroe Road, Suite 175
Charlotte, North Carolina 28270 Site Name: 109 — 111 West Lewis Street
T 704.846.8853 F 704.846.3271
109 and 111 West Lewis Street
enviroassessments.com Greensboro, North Carolina
enviroassessments EA Project Number: 14-9927.2

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14`

Attachment A

ROY COOPER
Governor
DIONNE DELLI-GATTI
Secretary
MICHAEL SCOTT
Director
Sent Via USPS and Email
Andrew Zimmerman
3412 Old Onslow Road
Greensboro, NC 27407
andyz(cr�,azdev.biz
NORTH CAROLINA
Environmental Quality
March 26, 2021
Subject: Request for Additional Assessment
Model Linen & West Lewis Street Brownfields Projects
109/111, 117-B1, and 120 West Lewis Street
Greensboro, Guilford County
Brownfields Project Numbers 08007-04-041 & 17046-13-041
Dear Mr. Zimmerman:
Thank you for your interest in the North Carolina Brownfields Program (the Program). We
understand that you are a follow-on owner of the Brownfields Property located at 120 West Lewis Street,
Greensboro, which is referred to as the Model Linen Brownfields site, and that you are the Prospective
Developer for the Brownfields Property located south of the Model Linen site at 109/111 and 117-B1
West Lewis Street, Greensboro. As you know, there was a discrepancy identified with regards to the land
use restrictions on the Model Linen site stemming from its original recordation in 2006. On March 25,
2021, I and Bruce Nicholson, our Program Manager, discussed this and other related issues with your
attorney, George House of Brooks Pierce. As a result of that discussion, we have developed the following
course of action to not only resolve the outstanding Model Linen issues, but also to efficiently and cost-
effectively move forward with the remainder of the brownfields process on the West Lewis Street
Brownfields project.
Additional Assessment
The Program is requesting additional assessment data for both the Model Linen and West Lewis
Street properties. This is based on the detection of trichloroethylene (TCE) in the groundwater at the
Model Linen site and the lack of sub -slab vapor data at each of these properties with the exception of only
one sample collected in the southeastern area of the 109/111 West Lewis Street location.
This data request is for representative sub -slab vapor data only from 1) the former Model Linen
building, 2) the 109/111 West Lewis Street building, and 3) the 117-B 1 building to evaluate the risk of
vapor intrusion into each of these buildings. The basis for the request is that the former Model Linen
building may be the source of TCE to groundwater and it is reportedly located upgradient of the 109/111
and 117-B 1 West Lewis Street buildings. Further, drycleaning was reported to have occurred in the 117-
B 1 West Lewis Street building (EnviroAssessments, August 8, 2013), but the available data does not
include sample points from that area in the building. Only one sub -slab vapor sample was collected from
the 109 West Lewis Street building in 2014, and the results indicated that low concentrations of TCE and
other volatile organic compounds (VOCs), including the daughter products of TCE were present in that
sample. This sample was collected in the southeastern area of this building, which is farther away from
the former Model Linen site, the potential source. Additional locations should be sampled therefore to
EQ2�
North Carolina Department of Environmental Quality I Division of Waste Management
217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
racy Sri cn�ac��rvu�
dePmvnbn m Eavi­wl Ouallh 919.707.8200

Model Linen & West Lewis Street
March 26, 2021
Page 2
identify current conditions under the slab and to evaluate the risk of vapor intrusion into each of these
buildings.
The assessment should be conducted in accordance with a DEQ-approved work plan and the most
current DWM vapor intrusion guidance. Please provide a work plan for my review and approval before
proceeding with the scope of work. We are also providing the attached Preliminary Vapor Intrusion Work
Plan & Report Checklist for your use in preparing this work plan and subsequent report. Please note that
this document is under review and may undergo further modification. Sample locations should target
known or suspected historical sources of TCE or other VOCs at each of these properties, including
drains/utility lines, and if historically present, subgrade structures. The data from this assessment will be
evaluated with the DEQ risk calculator; depending on the results, additional sub -slab or indoor air
assessment may be required. The sub -slab data collected for this assessment along with the data already
submitted to the Program will be used to document site conditions in the brownfields agreement and to
develop appropriate land use restrictions.
Brownfields Agreements
West Lewis Street Brownfields Agreement — We can begin the drafting process on the West Lewis
Street Brownfields Agreement (BFA) with the information we have now, but upon receipt will update the
draft BFA with the assessment data requested above. To be more efficient and cost-effective, we propose
to incorporate the Model Linen property into the West Lewis Street BFA. Upon recordation of this
agreement, the existing land use restrictions in the Model Linen BFA would be superseded and all of
these properties would be under one agreement and on one survey plat. This will save you transactional
costs and make complying with the annual Land Use Restriction Update reporting simpler.
Model Linen Brownfields Agreement — the Model Linen BFA was previously recorded, but it has
been determined that the land use restrictions of the agreement and those on the accompanying
Brownfields survey plat do not match. As discussed above, rather than amend this agreement, we propose
that we supersede the recorded Model Linen BFA with the new West Lewis Street BFA that will be
written to include the former Model Linen site.
Lastly, as you know the Brownfields Project Manager formerly assigned to address the Model
Linen plat discrepancy and to the West Lewis Street project has retired from the State. Going forward, I
will be handling the project management of this project. For at least the next couple of months, I will be
solely teleworking; therefore, the fastest way to reach me is via email at sharon.eckardAncdenr.gov or by
my State mobile number 919.609.2617.
I look forward to receiving the work plan for this scope of work. Please feel free to contact me if
you have any questions.
Sincerely,
Sharon Poissant Eckard, PG
Eastern District Supervisor
Brownfields Program
Division of Waste Management
Enclosure
ec: Central Files, DEQ
Bruce Nicholson, DEQ
George House, Brooks Pierce
D Q
� North Carolina Department of Environmental Quality I Division of Waste Management
217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
NORM CAROLiNA
DWffhrafft Q„a„ry 919.707.8200

Attachment B

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E, Skvarla, III
Governor Secretary
October 23, 2014
Mr. Andrew Zimmerman
AZ Development, LLC
3412 Old Onslow Road
Greensboro, NC 27407
Subject: REVISED LETTER OF ELIGIBILITY — WEST LEWIS STREET PROJECT
109/111 West Lewis Street
Greensboro, Guilford County
N.C. Brownfields Program Project No. 17046-13-041
Dear Mr. Zimmerman:
The North Carolina Department of Environment and Natural Resources (DENR) received,
on October 10, 2014, and has reviewed an Updated/Amended Brownfields Property Application
(U/ABPA) prepared and submitted by Michael P. McDermott Jr. of EnviroAssessments, PLLC
(EA) on behalf of AZ Development, LLC as the applicant Prospective Developer (PD) seeking
entry into the N.C. Brownfields Program (NCBP) and a brownfields agreement regarding a 0.24-
acre parcels located at 109/111 West Lewis Street, Greensboro, Guilford County (subject property).
On October 25, 2013, AZ Development, LLC was granted eligibility for entry into the
NCBP for its "West Lewis Street" redevelopment project, consisting of a single 0.48-acre parcel
located at 117-B1 West Lewis Street, immediately east of and contiguous to the subject property.
We understand that AZ Development, LLC desires to increase the acreage of its West Lewis Street
project by adding the subject property to the original 0.48-acre parcel already deemed eligible. We
understand further that AZ Development, LLC desires to purchase the subject property for
redevelopment in commercial retail, office and flex space. Upon review of the U/ABPA with
respect to the requirements of the Brownfields Property Reuse Act of 1997, DENR has determined
that this additional acreage is eligible for entry into the NCBP and for continued evaluation for a
Brownfields Agreement (BFA) as part of the West Lewis Street project.
The next step in the process will involve a detailed review of available environmental and
other relevant data to determine what is currently known about contamination at the site. We are in
receipt of a Phase I Environmental Site Assessment (ESA) for the 117-B1 parcel and a Phase I ESA
for the 109/111 parcel, both prepared by EA, dated June 12, 2013 and July 30, 2014, respectively,
and a Phase II ESA for the 109/111 parcel, dated September 8, 2014 and also prepared by EA.
These reports were submitted with the U/ABPA. Any existing historical site information from the
files of DENR's Division of Waste Management will also be utilized during the evaluation process.
Please forward to your brownfields Project Manager any additional environmental reports, data or
site information you may have or can acquire to assist in our evaluation. This should include reports
from other DENR agencies or regional offices, if available.
1646 Mail Service Center, Raleigh, North Carolina 27699-1646
Phone: [phone]Internet: http://portal.ncdenr.org/web/wm
An Equal Opportunity 1 Affirmative Action Employer — Made in part by recycled paper

Mr. Andrew Zimmerman
October 23, 2014
Page 2
We agree that the increased footprint of your West Lewis Street project will bring additional
public benefits to this emerging part of Greensboro. And, as mentioned in the Letter of Eligibility
for the 117-131 parcel, your West Lewis Street project will further advance the redevelopment
potential in an area that already has a brownfields agreement - the Model Linen project on property
located across the street from the West Lewis Street site.
We look forward to working with you to advance this now expanded second brownfields
redevelopment project you have brought to the Program, your first being the Burlington
Distribution site. Tony Duque will continue to be the brownfields Project Manager for the West
Lewis Street project. If you have questions about this correspondence or require additional
information, please feel free to contact Tony by phone at 919-707-8380 or by e-mail at
[e-mail].
Sincerely,
�G
Michael E. Jott
Deputy Director
Division of Waste Management
cc: Project File
ec: Bruce Nicholson, DENR
Tony Duque, DENR

9111 Monroe Road, Suite 175
Charlotte, North Carolina 28270
T 704.846.8853 F 704.846.3271
enviroassessments. com
enviroassessments
109 -111 WEST LEWIS STREET
September 8, 2014
Mr. George House, Attorney -At -Law
Brooks Pierce
2000 Renaissance Plaza
230 N. Elm Street
Greensboro, North Carolina 27401
[phone]
Attention: Mr. George House, Attorney -At -law
Reference: Phase II Environmental Site Assessment
109-111 West Lewis Street
109 and 111 West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
Dear Mr. House:
EnviroAssessments (EA) has completed a Phase II Environmental Site Assessment (ESA) of the 109-111
West Lewis Street property (the "Site"), located in Greensboro, Guilford County, North Carolina. A Site
Location Map is attached as Figure 1. EA conducted a Phase I Environmental Site Assessment of the Site
and a report was submitted to High Point Bank on July 17, 2014 under separate cover. The purpose of the
Phase II ESA was to evaluate the Site with respect to potential contamination issues associated with the on -
site historic painting operations and auto repair operations and to evaluate the Site for the presence of
chlorinated solvents in groundwater which have been identified at the off -site western adjacent property (117
BI West Lewis Street) and the off -site northern Model Linen-B site.
1.0 SITE HISTORY
The Site consists of one approximately 0.24 acre rectangular -shaped parcel of land identified as Parcel
Identification Number 7864631801 according to the Guilford County Tax Assessor's Office. The Site is
improved with one approximately 9,269 square foot vacant commercial building which was constructed in
1910. The Site building is currently unoccupied and was formerly occupied by various tenants including
Farmers Horse and Mule Company, Carolina Service Corporation Auto Repairs, and Kindley's Warehouse
Storage. The office/warehouse facility was most recently occupied by Kindley's Office Supply, 109 West
Lewis Street and Rhyne Warehouse, 111 West Lewis Street.
To summarize the Site history, the Site has been improved with the present building since around 1910.
Sanborn maps and/or city directories indicate the Site has been improved since at least 1885. The Site
formerly existed as a wagon/carriage company from at least 1885 through 1913; as an auto garage and/or auto

Phase II Environmental Site Assessment
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
2
repair shop and Pepsi Cola Bottling Company in 1919 through at least 1925; as a furniture warehouse from at
least 1950 through 1971; also as an auto repair shop from 1962 through 1965; and as a warehouse and/or
office supply company from 1969 through 1989. The building is presently vacant.
The ESA revealed no evidence of recognized environmental conditions in connection with the Site,
except for the following:
• The Site contained operations involving painting from at least 1885 through at least 1919 and auto
repair shops in 1919 and from at least 1962 through 1965. Historically, auto repair shops have been
known to utilize quantities of petroleum products and solvents, and painting operations have used
petroleum -based paints and solvents. These activities typically generate wastes associated with the
same substances, the disposal and management of which have not been closely regulated in the past.
Based on the length of time the Site historically operated with one or more of these uses
(intermittently from at least 1885 through the 1960s), a potential exists that undocumented releases of
petroleum products and/or solvents have caused an impact to the Site's soil and/or groundwater
quality.
• West Lewis Street Property, located adjacent to the west and topographically cross -gradient of the
Site at 117 West Lewis Street, is listed as a Brownfields Management System/Brownfield Sites,
Pending Eligibility property. EA completed a prior Phase I Environmental Site Assessment; West
Lewis Street Property prepared by EnviroAssessments and dated June 12, 2013 on this property.
According to the report, historical resources indicated the property operated as Greensboro Laundry
& Cleaners with suspected on -site "dry cleaning" operations from as early as 1950 through 1971.
Additionally, the report identified potential off -site sources of chlorinated solvent contaminants in the
area. EA completed a subsequent Phase II assessment of the adjacent property, dated August 8, 2013
which identified Tetrachloroethene (PCE) in soil and groundwater at this property, within 30 feet of
the Site's western property boundary. The lateral extent of the contamination has not been defined,
including in the direction of the 109-111 West Lewis Street subject Site, and the source(s) of the
contamination have not been definitively identified. Therefore, a significant potential exists that
similar contamination may also be present in groundwater at the 109-111 West Lewis Street Site.
• The property formerly known as Model Linen-B at 120 West Lewis Street, along the north side of
West Lewis Street, approximately 40 feet north of the Site property, is listed on the state's (North
Carolina Department of Environment and Natural Resources or NCDENR) Incident Management
Database (IMD) and Leaking Underground Storage Tanks (LUST) database with two open incident
case numbers: Inc. No. 16349 and Inc. No. 86606. The site has contaminants identified in the
groundwater which exceed the NCDENR NCAC 2L Ground Water Quality Standards (NCAC 2L
Standards). Some of the contaminants which exceed the NCAC 2L Standards include Benzene,
Vinyl Chloride, Trichloroethene, and Tetrachloroethene. A Brownfields plat indicates MW-3 is one
of the monitoring wells with concentrations of Benzene and Tetrachloroethene which exceed the
NCAC 2L Standards. MW-3 is located approximately 40 feet north of the 109-111 West Lewis
Street Site property. Available information does not specify groundwater flow direction and does not
indicate if the contamination has migrated off -site to the south toward the Site. Considering the
proximity of the contamination at the Model Linen site to the Site property (within 40 feet) and the

Phase II Environmental Site Assessment
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
absence of data detailing contaminant distribution patterns or groundwater flow direction, the Model
Linen site is a potential off -site source of contaminants to the 109-111 West Lewis Street subject Site.
We note that the recently revised ASTM E-1527-13 Phase I ESA guidance process requires that
Phase I ESAs now consider the potential for vapor encroachment onto a Site property from
contamination associated with on -site and nearby off -site sources. The possible presence of volatile
hydrocarbons from the on -site and off -site concerns noted above are potential sources of vapor
encroachment for the Site property and may pose a potential for vapor intrusion into the Site building
which could be considered to be a potential health concern in some situations.
In addition, the following BERs (Business Environmental Risks) were identified:
EA personnel noted evidence of water/moisture intrusions and substantial water damaged ceiling
finishes on the wood framing and roof supports throughout the Site building. The moisture issues
appear to be the result of roof leaks and/or faulty water piping. A potential exists that substantial
water/moisture intrusion has proliferated, damaging the building's interior finishes and potentially its
structural materials. No areas of suspect mold growth were observed during EAs physical inspection
of the Site building. EA personnel did not observe any areas which were not readily accessible such
as attics, crawl spaces, and ventilation systems. Significant damage of the building and the presence
of mold are conditions which normally detract from the value and "marketability" of a property. In
order to confirm the presence of absence of mold or excessive moisture conditions, particularly in
areas that are not readily accessible or visible (i.e.; attics, ventilation systems, etc.), a formal mold
and moisture inspection would be necessary.
• Considering the age of the Site building (constructed in 1910) a potential exists that asbestos -
containing materials (ACMs) could be present in some of the building's construction materials. EA
personnel observed no obvious evidence of damaged suspect ACMs. However, in order to confirm
the presence or absence of ACMs in any structure, a formal ACM survey would be required.
• Based on the age of the Site building (constructed in 1910) a potential exists that lead based paint
(LBP) could be present on some of the building's painted surfaces. EA personnel observed no
significant amounts of damaged paint at the Site. However, in order to confirm the presence or
absence of lead -based paint in any structure, a formal lead -based paint survey would be required.
The Client (Brooks Pierce) authorized EA to complete a Phase II ESA to evaluate the Site in order to
determine potential on -site impacts from the concerns noted above, the details of which are provided in the
following sections of this report.

Phase II Environmental Site Assessment 4
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
2.0 FIELD ACTIVITIES
2.1 Subsurface Utility Locating
EA personnel contacted the North Carolina One Call Center and requested that the local utility services
conduct an Electromagnetic (EM) Survey in the area of concern at the Site to determine the orientation and
location of underground utility lines for optimal sampling locations. At the time of the assessment,
underground utility lines appeared to be marked up to the Site boundaries. However, public utilities are not
authorized to locate underground lines on private property.
On August 22, 2014, EA and its subcontractor, Sweetwater Utility Exploration (Sweetwater), conducted an
on -site ground -penetrating radar (GPR) survey and EM survey at the Site to determine the orientation and
location of on -site subsurface utilities (including building interior) in order to determine optimal sampling
locations. All items located were marked directly on the surface using paint.
2.2 Soil Assessment
On August 22, 2014, EA and its subcontractor utilized a Geoprobe® sampling device to advance soil sample
points in six (6) locations (S-1 through S-6) of the Site, as depicted on the attached Figure 2. A total of six
(6) on -site soil samples (5-1-2, 5-2-2, 5-3-2, 5-4-2, 5-5-2 and S-6-2) were collected from the six (6) soil
boring locations. EA personnel screened the soil columns for Volatile Organic Compounds (VOCs) from
each boring at two -foot intervals using a Photo Ionization Detector (PID), and visual and olfactory indicators.
Phase II Site Photos are included as Appendix 1. Boring logs are included in Appendix 2 which detail soil
descriptions, sampling depths and field screening results.
Soil boring S-1 was advanced to a depth of 18 feet below grade (BG) near the western interior wall of the 109
West Lewis Street building. Soils encountered in the boring consisted of concrete at depths of 0-2 inches
underlain by tan/red stiff clay and dark browniblack silt at depths of 2 inches to 4 feet BG, tan/red clayey silt
at depths of 4-16 feet BG and brown/gray micaceous clayey silt at depths of 16-18 feet BG. Soils were
observed to be moist at depths of 8-16 feet BG and saturated at depths of 16-18 feet BG. Petroleum odors
were noted in the soil at depths of 8-18 feet BG. Field screening of the soils did not indicate detectable VOC
concentrations in the soils at depths of 2-6 feet BG; however, detectable VOC concentrations ranged from 0.5
parts per million (ppm) at a depth of 8 feet BG to 162 ppm at a depth of 18 feet BG. One (1) soil sample (S-
1-2) was collected at a depth of two (2) feet BG from soil boring S-1.
Soil boring S-2 was advanced to a depth of 20 feet below grade (BG) near the western interior wall of the 109
West Lewis Street building and to the north of soil boring S-1. Soils encountered in the boring consisted of
concrete at depths of 0-2 inches underlain by tan/red clayey silt at depths of 2 inches to 12 feet BG and
brown/gray micaceous clayey silt at depths of 12-20 feet BG. Soils were observed to be moist at depths of 12-
14 feet BG and saturated at depths of 14-20 feet BG. Petroleum odors were noted in the soil at depths of 12-
20 feet BG. Field screening of the soils did not indicate detectable VOC concentrations in the soils at depths
of 2-6 feet BG. One (1) soil sample (5-2-2) was collected at a depth of two (2) feet BG from soil boring S-2.

Phase II Environmental Site Assessment
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
5
Soil boring S-3 was advanced to probe refusal, which was encountered at a depth of 18 feet below grade
(BG), near the northwestern exterior portion of the 109 West Lewis Street building. Soils encountered in the
boring consisted of concrete at depths of 0-2 inches underlain by tan stiff clay at depths of 2 inches to 4 feet
BG, tan/red clayey silt at depths of 4-12 feet BG, tan/gray clayey silt at depths of 12-16 feet BG and tan sandy
silt at depths of 16-18 feet BG. Soils were observed to be moist at depths of 16-18 feet BG. Petroleum odors
were noted in the soil at depths of 12-18 feet BG. Field screening did not indicate detectable VOC
concentrations at depths of 2-6 feet BG. One (1) soil sample (5-3-2) was collected at a depth of two (2) feet
BG from soil boring S-3.
Soil boring S-4 was advanced to a depth of 8 feet below grade (BG) near the southern exterior of the 109
West Lewis Street building. Soils encountered in the boring consisted of tan stiff clay at depths of 0-4 feet
BG underlain by tan clayey silt at depths of 4-8 feet BG. The soils were observed to be dry and no solvent or
petroleum odors were noted in soil boring S-4. Field screening did not indicate detectable VOC
concentrations in the soils at depths of 2-8 feet BG. One (1) soil sample (S-4-2) was collected at a depth of
two (2) feet BG from soil boring S-4.
Soil boring S-5 was advanced to a depth of 8 feet below grade (BG) near the southern exterior of the 111
West Lewis Street building and to the west of soil boring S-4. Soils encountered in the boring consisted of
dark brown stiff clay at depths of 0-2 feet BG underlain by tan/red clayey silt at depths of 2-8 feet BG. The
soils were observed to be dry and no solvent or petroleum odors were noted in soil boring S-5. Field
screening did not indicate detectable VOC concentrations in the soils at depths of 2-8 feet BG. One (1) soil
sample (5-5-2) was collected at a depth of two (2) feet BG from soil boring S-5.
Soil boring S-6 was advanced to a depth of 20 feet below grade (BG), near the southwestern exterior portion
of the I I I West Lewis Street building and to the west of soil boring S-5. Soils encountered in the boring
consisted of dark brown clayey silt at depths of 0-2 feet BG underlain by brown clayey silt at depths of 2-12
feet BG and gray/tan silty sand at depths of 12-20 feet BG. Soils were observed to be moist at depths of 8-16
feet BG and saturated at depths of 16-20 feet BG. Solvent odors were noted in the soils at depths of 12-20
feet BG. Field screening did not indicate detectable VOC concentrations at depths of 2-6 feet BG. One (1)
soil sample (5-6-2) was collected at a depth of two (2) feet BG from soil boring S-6.
The soil samples were placed into appropriate sample containers and labeled with the Site name, time and
date of collection, and analysis to be performed. The filled sample containers were placed in a cooler
containing ice and transported to Pace Analytical Services, Inc. in Huntersville, North Carolina (a North
Carolina -certified laboratory). A chain -of -custody form was maintained with the samples. All soil samples were
submitted and analyzed for volatile organic compounds (VOCs) by EPA Method 8260 and semi -volatile
Polynuclear Aromatic Hydrocarbons (PAHs) by EPA Method 8270. A copy of the laboratory analytical
report is attached as Appendix 3. The laboratory results are discussed in Section 3.0 of this report.

Phase II Environmental Site Assessment 6
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
2.3 Groundwater Assessment
On August 22, 2013, EA and its subcontractor utilized the Geoprobe sampling device to install a total of four
(4) temporary groundwater piezometer wells at the Site (TMW-1 through TMW-4) in the locations of the Site
depicted on the attached Figure 2. All groundwater piezometer wells were constructed of 1-inch diameter
PVC screen and casing and completed approximately 1-2 feet above grade. Detailed well construction
information is included in Table 4.
Piezometer well TMW-1 was installed to the termination depth (18 feet BG) in soil boring S-1 and the well
was constructed with 10 feet of screen (8-18 feet BG). Piezometer well TMW-2 was installed to the
termination depth of soil boring S-2 (20 feet BG) and the well was constructed with 10 feet of screen (10-20
feet BG). Piezometer well TMW-3 was installed to the termination depth of soil boring S-3 (18 feet BG) and
the well was constructed with 10 feet of screen (8-18 feet BG). Piezometer well TMW-4 was installed to the
termination depth of soil boring S-6 (20 feet BG) and the well was constructed with 10 feet of screen (10-20
feet BG). Upon installation, the piezometer wells were developed/purged and allowed to equilibrate for
approximately 1-6 hours prior to collecting groundwater samples. Temporary piezometer well boring/well
construction logs are included in Appendix 2.
On August 22, 2013, EA personnel collected groundwater samples (TMW-1 through TMW-4) from each of
the four (4) piezometer wells using clean, dedicated polypropylene tubing and a peristaltic pump. In addition,
EA personnel collected one (1) groundwater sample from an existing off -site groundwater monitoring well
(MW-3) located to the northwest of the Site at 120 West Lewis Street (currently Lotus Lounge). Prior to
collecting the groundwater sample from MW-3, EA personnel purged the monitoring well of approximately 3
well volumes of water.
The groundwater samples were placed into appropriate sample containers and labeled with the Site name,
time and date of collection, and analysis to be performed. The filled sample containers were placed in a
cooler containing ice and transported to PACE Analytical in Huntersville, North Carolina (a North Carolina -
certified laboratory). A chain -of -custody form was maintained with the sample. The groundwater samples were
submitted and analyzed for VOCs by EPA Method 8260 and PAHs by EPA Method 8270. A copy of the
laboratory analytical report is attached as Appendix 3. The laboratory results are discussed in Section 3.0 of
this report.
On August 25, 2014, EA personnel returned to the Site to gauge groundwater levels in the temporary
piezometer wells and off -site existing groundwater monitoring well MW-3. EA gauged the depth to the
groundwater table (from the top of well casings) for each of the on -site groundwater piezometer wells. Using
a SpectraVision Laser Level, EA personnel surveyed the elevations of the tops of each well casing. Using an
assumed benchmark elevation, EA calculated relative well casing elevations. Using the water table depths,
EA then calculated the relative water table elevations at each well point. The well casing and water table data
are provided on Table 4. All of the piezometer wells appear to be hydraulically connected as part of the same
surficial water table aquifer. The relative water table elevations and groundwater -flow direction are presented
on Figure 3. Based on the groundwater elevation measurements taken at the Site, the shallow groundwater
flow direction is interpreted to be generally to the southeast across the site.

Phase II Environmental Site Assessment 7
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
2.4 Sub -Slab Assessment
On August 22, 2014, EA and its subcontractor utilized a Geoprobe® sampling device to install one (1)
temporary sub -slab vapor probe (VP-1) in the location depicted on the attached Figure 2. The boring was
advanced to a depth of 4 feet BG to the north of a floor drain located near the center of the 109 West Lewis
Street building. A temporary sub -slab vapor probe constructed of a stainless steel mesh sampling point
connected to'/4 inch diameter Teflon tubing was inserted into the boring to a depth of 3 feet BG. Sand was
placed around the sampling point at depths of 2.5-4 feet BG and bentonite was utilized to seal the boring to
the floor surface. Once a proper seal had been established, at least five (5) volumes of air were purged from
the tubing and sand pack interval prior to sample collection.
One (1) sub -slab vapor sample (VP-1) was collected by attaching the tubing to a dedicated one -liter Summa
vacuum canister and a pre -calibrated ten-minute flow controller with vacuum gauge. The Summa canister
was then opened and a sub -slab vapor sample was collected at an approximate flow rate of 70 milliliters per
minute for approximately 14 minutes, until the vacuum remaining in the canister measured approximately 3
inches inches of Mercury (Hg).
The Summa canister was labeled with the Site name, time and date of collection, canister ID, flow control
number and analysis to be performed. The filled canister was transported to Pace Analytical in Huntersville,
North Carolina (a North Carolina -certified laboratory). A chain -of -custody form was maintained with the
sample. The sub -slab vapor sample was submitted and analyzed for VOCs by EPA Method TO-15. A copy of
the laboratory analytical report is attached as Appendix 3. A Field Data Sheet containing detailed sub -slab
vapor sampling information is attached as Appendix 4. The laboratory results are discussed in Section 5.0 of
this report.
3.0 LABORATORY ANALYTICAL RESULTS
3.1 Soil Assessment
EA collected a total of six (6) soil samples (S-1-2, S-2-2, S-3-2, S-4-2, S-5-2 and S-6-2) in the locations
shown on Figure 2. A copy of the laboratory analytical report is attached as Appendix 3 and a summary of
the soil sampling results is presented in Table 1. In Summary, laboratory analysis did not reveal
concentrations of target analytes exceeding North Carolina Department of Environment and Natural
Resources (NCDENR), Inactive Hazardous Sites Branch (IHSB) Industrial Health -Based Preliminary Soil
Remediation Goals (PSRGs) or Protection of Groundwater PSRGs.
Laboratory analysis of soil sample S-1-2 revealed an Acetone concentration of 0.230 milligrams per kilogram
(mg/kg), which does not exceed the Protection of Groundwater PSRG of 24 mg/kg of the Industrial Health -
Based PSRG of 100,000 mg/kg for Acetone. No target analytes were detected above laboratory reporting
limits in the remaining soil samples (S-2-2, S-3-2, S-4-2, S-5-2 and S-6-2).
Refer to Sections 4.0 and 5.0 for EA's conclusions and recommendations.

Phase II Environmental Site Assessment 8
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
3.2 Groundwater Assessment
EA collected a total of five (5) groundwater samples (TMW-1, TMW-2, TMW-3, TMW-4 and MW-3) at the
locations shown on Figure 2. A copy of the laboratory analytical report is attached as Appendix 3 and a
summary of the groundwater sampling results is presented in Table 2. In Summary, four (4) of the five (5)
groundwater samples (TMW-1, TMW-2, TMW-4 and MW-3) revealed concentrations of the target analytes
exceeding NCAC 2L Groundwater Quality Standards (2L Standards). None of the groundwater samples
revealed concentrations of target analytes exceeding Gross Contamination Levels (GCLs).
Laboratory analysis of on -site groundwater sample TMW-1 revealed a Benzene concentration of 59.8
micrograms per liter (ug/L), which exceeds the 2L Standard of 1 ug/L for Benzene. Groundwater sample
TMW-1 revealed concentrations of Naphthalene (316 ug/L), and 2-Methylnaphthalene (33.0 ug/L) which
exceed the 2L Standards of 6 ug/L for Naphthalene and 30 ug/L for 2-Methylnaphthalene. In addition,
groundwater sample TMW-1 revealed a 1-Methylnaphthalene concentration of 14.9 ug/L which exceeds the
Interim Maximum Allowable Concentration (IMAC) of 1 ug/L for 1-Methylnaphthalene (effective April 1,
2011). No other target analytes were detected in groundwater sample TMW-1 at concentrations exceeding 2L
Standards or IMACs. However, several additional target analytes were detected in groundwater sample
TMW-1 at concentrations below their respective 2L Standards.
Laboratory analysis of on -site groundwater sample TMW-2 revealed a Naphthalene concentration of 99.9
ug/L, which exceeds the 2L Standard of 6 ug/L for Naphthalene. No other target analytes were detected in
groundwater sample TMW-2 at concentrations exceeding 2L Standards or IMACs. However, several
additional target analytes were detected in groundwater sample TMW-2 at concentrations below their
respective 2L Standards.
Laboratory analysis of on -site groundwater sample TMW-3 did not reveal any target analyte concentrations
exceeding 2L Standards. Groundwater sample TMW-3 revealed a Naphthalene concentration of 4.0 ug/L,
which is below the 2L Standard of 6 ug/L for Naphthalene. No other target analytes were detected in
groundwater sample TMW-3 at concentrations exceeding laboratory reporting limits.
Laboratory analysis of on -site groundwater sample TMW-4 revealed concentrations of Naphthalene (420
ug/L), Ethylbenzene (668 ug/L), Total Xylenes (1,030 ug/L) and 2-Methylnaphthalene (33.7 ug/L), which
exceed the 2L Standards of 6 ug/L for Naphthalene, 600 ug/L for Ethylbenzene, 500 ug/L for Total Xylenes
and 30 ug/L for 2-Methylnaphthalene. Groundwater sample TMW-4 also revealed a 1-Methylnaphthalene
concentration of 16.7 ug/L, which exceeds the IMAC of 1 ug/L for 1-Methylnaphthalene. No other target
analytes were detected in groundwater sample TMW-4 at concentrations exceeding 2L Standards or IMACs.
However, several additional target analytes were detected in groundwater sample TMW-4 at concentrations
below their respective 2L Standards.
Laboratory analysis of off -site groundwater sample MW-3 revealed concentrations of Benzene (4.7 ug/L),
Naphthalene (53.9 ug/L) and Tetrachloroethene (PCE; 13.1 ug/L), which exceed the 2L Standards of 1 ug/L
for Benzene, 6 ug/L for Naphthalene and 0.7 ug/L for PCE. Groundwater sample MW-3 also revealed a 1-
Methylnaphthalene concentration of 13.7 ug/L, which exceeds the IMAC of 1 ug/L for 1-Methylnaphthalene.
No other target analytes were detected in groundwater sample MW-3 at concentrations exceeding 2L

Phase II Environmental Site Assessment
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
0
Standards or IMACs. However, several additional target analytes were detected in groundwater sample MW-
3 at concentrations below their respective 2L Standards.
Refer to Sections 4.0 and 5.0 for EA's conclusions and recommendations.
3.3 Sub -Slab Assessment
EA collected a total of one (1) sub -slab vapor sample (VP-1) for laboratory analysis, the location of which is
depicted on Figure 2. The sub -slab vapor sampling analytical results are presented in Table 3 and Figure 2.
A copy of the laboratory analytical report is attached as Appendix 3. A Field Data Sheet containing detailed
sub -slab vapor sampling information is attached as Appendix 4. In summary, laboratory analysis of sub -slab
vapor sample VP-1 did not reveal concentrations of target analytes exceeding NCDENR, Division of Waste
Management (DWM), Non -Residential Sub Slab and Exterior Soil Gas Screening Levels (SGSLs), recently
updated for June 2014 and used by the IHSB.
Laboratory analysis of sub -slab vapor sample VP-1 revealed detectable concentrations of several target
analytes; however, none of the detected concentrations exceed DWM Non -Residential SGSLs.
Refer to Sections 4.0 and 5.0 for EA's conclusions and recommendations.
4.0 CONCLUSIONS
4.1 Soil Assessment
EA collected a total of six (6) soil samples (5-1-2, S-2-2, 5-3-2, 5-4-2, S-5-2 and S-6-2) in the locations
shown on Figure 2. In summary, none of the soil samples revealed concentrations of target analytes
exceeding IHSB Industrial Health -Based PSRGs or Protection of Groundwater PSRGs.
Based on the laboratory analytical results, no significant petroleum or solvent contamination was identified in
shallow on -site soils in the areas of the site investigated during this Phase II ESA.
However, three (3) of the four (4) on -site groundwater samples (TMW-1, TMW-2 and TMW-4) revealed
concentrations of petroleum constituents exceeding 2L Standards. The source area of the identified on -site
petroleum -contaminated groundwater plume is currently unknown; however, considering the Site's former
automotive repair activities, a potential exists that an on -site source area is associated with the identified on -
site petroleum -contaminated groundwater.
4.2 Groundwater Assessment
EA collected a total of five (5) groundwater samples (TMW-1 through TMW-4 and MW-3) in the locations
shown on Figure 2. In summary, four (4) of the five (5) groundwater samples (TMW-1, TMW-2, TMW-4
and MW-3) revealed concentrations of target analytes exceeding 2L Standards.

Phase II Environmental Site Assessment
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
10
Groundwater samples TMW-1, TMW-2 and TMW-4 revealed concentrations of petroleum constituents
exceeding 2L Standards in on -site groundwater. Groundwater sample TMW-4, collected near the
southwestern exterior corner of the Ill West Lewis Street building, generally revealed the highest
concentrations of petroleum constituents in on -site groundwater during this Phase II ESA. None of the six (6)
soil samples collected during this Phase II ESA revealed detectable concentrations of petroleum constituents
in on -site shallow soil and the source area for the identified petroleum -contaminated groundwater is currently
unknown. However, considering the Site's former painting and automotive repair activities, a potential exists
that an on -site source area is associated with the petroleum -contaminated groundwater.
Groundwater sample MW-3, collected from an existing groundwater monitoring well located off -site and
approximately 40 feet to the northeast of the Site at 120 West Lewis Street (currently Lotus Lounge), revealed
concentrations of petroleum and solvent constituents exceeding 2L Standards. The elevated petroleum and
solvent constituent concentrations detected in MW-3 appear to be associated with previously identified and
documented release incident numbers 16349 and 86606 at the Model Linen-B site formerly located at 120
West Lewis Street. Based on the groundwater elevation measurements taken at the Site and from off -site
groundwater monitoring well MW-3, the shallow groundwater flow direction is interpreted to be generally to
the southeast and towards the Site. Therefore, the potential exists that the petroleum contamination identified
in on -site groundwater may be associated with the previously documented release incidents associated with
the Model -Linen B site. However, based on the lack of solvent constituents detected in the on -site
groundwater samples (TMW-1, TMW-2, TMW-3 and TMW-4) and considering the highest concentrations of
petroleum constituents were detected in the groundwater sample (TMW-4) located the farthest distance from
MW-3, it does not appear likely that the on -site petroleum -contaminated groundwater has been significantly
impacted as a result of the release incidents associated with the Model Linen-B site.
Two of the groundwater samples (TMW-1 and TMW-4) revealed concentrations of petroleum constituents
exceeding NCDENR, DWM Non -Residential Vapor Intrusion Groundwater Screening Levels (GWSLs).
Groundwater samples TWM-1 and TMW-4 revealed concentrations of Ethylbenzene and Naphthalene which
exceed the DWM Vapor Intrusion GWSLs of 152 ug/L for Ethylbenzene and 146 ug/L for Naphthalene. In
addition, groundwater sample TWM-4 revealed a Total Xylenes concentration of 1,030 ug/L, which exceeds
the DWM GWSL of 414 ug/L for Total Xylenes. DWM GWSLs are detailed in the Groundwater Sampling
Analytical Table (Table 2). Refer to section 4.3 for additional information regarding on -site structural
vapor intrusion potential at the Site.
4.3 Sub -Slab Vapor Intrusion Assessment
EA collected a total of one (1) sub -slab vapor sample (VP-1) for laboratory analysis, the location of which is
depicted on Figure 2. The sub -slab vapor sampling analytical results are presented in Table 3 and Figure 2.
A copy of the laboratory analytical report is attached as Appendix 3. In Summary, laboratory analysis of
sub -slab vapor sample VP-1 did not reveal concentrations of target analytes exceeding NCDENR, DWM,
Non -Residential Sub Slab and Exterior Soil Gas and Screening Levels (SGSLs), recently updated for June
2014.
Laboratory analysis of soil -slab vapor sample VP-1 revealed detectable concentrations of several target
analytes; however, none of the detected concentrations exceed DWM Non -Residential SGSLs.

Phase II Environmental Site Assessment
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
11
Based on the laboratory analytical results of sub -slab vapor sample VP-1, no evidence of significant adverse
impact associated with potential vapor encroachment/migration from the off -site northwestern Model Linen-B
release incidents and/or from the western adjacent 117 B West Main Street property was identified at the Site
during this Phase II ESA. However, two (2) of the groundwater samples (TMW-1 and TMW-4) collected at
the Site revealed concentrations of target analytes exceeding NCDENR, DWM Non -Residential Vapor
Intrusion Groundwater Screening Levels (GWSL). Based on the presence of on -site groundwater exceeding
DWM GWSLs and the limited sub -slab vapor sampling conducted during this Phase II ESA, the potential
exists for structural vapor intrusion potential to have adversely impacted portions of the Site not investigated
during this Phase II ESA. Sub -slab sampling results can vary significantly according to seasonal and
temporal weather conditions (rain, snow, barometric pressure changes) along with changes to potential
migration pathways such as utilities and surficial cover (impervious surfaces such as pavement, buildings,
clay fill).
�XI 71[4117u 101111eI 7r Y [Qe1f1
We recommend that this report be forwarded to the Guilford County Department of Public Health (GCDPH)
for guidance on whether additional site assessment will be required under State guidelines. The GCDPH will
consider the findings with regard to potential on -site and off -site sources and potentially responsible parties.
The GCDPH could require additional soil and groundwater assessment at the Site to further evaluate the
following:
1. the lateral and vertical extents of potential on -site source areas of petroleum contamination identified
in on -site groundwater;
2. more definitive evaluation of potential off -site sources of contamination;
3. potential "worst case" conditions for sub -slab vapors as a function of colder temperatures and
various temporal weather conditions.
We also recommend that the Client consider determination of eligibility into the Brownfield Program by
preparing Brownfields Property Application for the Site and/or inclusion with the adjacent property to the
west (117 B1 West Lewis Street).

Phase II Environmental Site Assessment 12
109-111 West Lewis Street
109 and I I I West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project No. 14-9927.2
September 8, 2014
6.0 CLOSURE
EA appreciates the opportunity to be of service to you on this Site. Please call the undersigned at (704) 846-
8853 if you desire additional information.
Sincerely,
EnviroAssessments, PLLC
Michael P. McDermott Jr.
Project Manager
Attachments
Gary K. Sawyer, PG, RSM
Principal
Cliff R. Lundgren, P.G.
Senior Project Manager

FIGURES

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1 —Site Location Ma p
Source: USGS 7.5 Minute Topographic Map Greensboro,
North Carolina Quadrangle 1951 (photorevised 1994)
Scale: 1:24,000
9111 Monroe Road, Suite 175
Charlotte, North Carolina 28270
T 704.846.8853 F 704.846.3271
Y
Site Name:
109 - 111
West Lewis Street
109 and 111 West Lewis Street
+
enviroassessments.com
Greensboro, North Carolina
enviroassessments
EA Project Number: 14-9927.2

'.:it
su t i
04
Benzene: 4.7
_.* Ethylbenzene: 65.8
Naphthalene: 53.9
PCE: 13.1
J TCE: 1.2
(NS) MEK:17.5
Cis-1,2-Dichloroethene:
�1
F 4�syrrt �• � 1
S-1-2 I
Acetone:0.230 -JI'
r' • •
' TMW-1 +
" I J "a Acetone:40.7
Benzene:59.8
I Toluene: 4.4
Ethylbenzene:
w•I otal Xylenes: 325
Naphthalene:316� `
Styrene: 9.8 D
-JJfEK: 29.2 •
f MIBK:31.3.. _
(ND) S-4-2
�• T I n : 14.
Eth Ibenzene:668
Total Xylenes: 1,030
Na hthalene:420 A
2-Chlorotoluene: 58.3
rl
S-3-2 (ND) `
TMW-3
Naphthalene: 4.0
S-2-2 (ND)
TMW-2
Acetone: 46.8
Ethylbenzene: 77.5
Total Xylenes: 49.8
Naphthalene: 99.9
�MEK: 30.0
MIBK: 13.2
p-Isoptopyltoluene: 23.4
* `VP-1
No Target Analyte
■ Concentrations exceeded
the DMW Non -Residential
Sub Slab and Exterior Soil
Gas Vapor Intrusion
Screening Level.
7.
LEGEND FD — Floor Drain
Soil Concentrations Are Reported in Milligrams Per Kilogram (mg/kg).
O Soil Sample Location Groundwater Concentrations Are Reported in Micrograms Per Liter (ug/L).
Soil Sample and Temporary Monitoring Sub -Slab Vapor Concentrations Are Reported in Micrograms Per Cubic Meter (ug/m3)
® Well/Groundwater Sample Location BOLD Concentrations Exceed Soil PSRGs, NCAC 2L Groundwater Standards,
or DWM Non -Residential Vapor Intrusion Screening Levels.
Sub -Slab Vapor Sample Location PSRG - Preliminary Soil Remediation Goal NS — Nest Samnleri
•Off -site Groundwater Monitoring =-Exceeds DWM Non -Residential Vapor Intrusion Groundwater Screening Level (GWSL)
Well MEK = 2-Butanone PCE = Tetrachloroethene
MIBK = 4-Meth I-2-Pentanone TCE = Trichloroethene
FIGURE 2 — SITE PLAN Source: Google Earth Scale: 1 Inch = 40 feet
N
9111 Monroe Road, Suite 175
Charlotte, North Carolina 28270 Site Name: 109 - 111 West Lewis Street
T 704.846.8853 F 704.846.3271
109 and 111 West Lewis Street
enviroassessments.com Greensboro, North Carolina
enviroassessments EA Project Number: 14-9927.2

r �
II'
r
;;;u5 , uul;-� (90.00)
120 "J'Ve ;t wis
46
MW y (89.50)
(90.18) L
T _
# (88.50
TM-3
Ll ;" LI (88.86) -
+ 76'i
I
r lullu�3 � 1
�• ICJ �
TMW-2
(88.22)
I F &� r 1
jr
F -
�I_ TMW-'
" MW-4 tFl
(88.23)
LEGEND (89.00) Potentiometric Contour Line
®Temporary Monitoring Well Location (88.86) Groundwater Elevation (Ft.)
Off -site Groundwater Monitoring Well
Interpreted Groundwater Flow Direction
FD — Floor Drain
FIGURE 3 — POTENTIOMETRIC CONTOUR MAP Source: Google Earth Scale: 1 Inch = 40 feet
N
9111 Monroe Road, Suite 175
Charlotte, North Carolina 28270 Site Name: 109 — 111 West Lewis Street
T 704.846.8853 F 704.846.3271
109 and 111 West Lewis Street
enviroassessments.com Greensboro, North Carolina
enviroassessments EA Project Number: 14-9927.2

TABLES

TABLE 1
SOIL SAMPLING ANALYTICAL RESULTS
109-111 WEST LEWIS STREET
109 AND III WEST LEWIS STREET
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
ENVIROASSESSMENTS PROJECT NO. 14-9927.2
Sample ID
Analytical
Method
S-1-2
S-2-2
S-3-2
S-4-2
S-5-8
S-6-2
Preliminary
Industrial Health-
Based PSRG
Protection of
Groundwater
PSRG
Sample Depth (ft, bgs)
2
2
2
2
2
2
Collection Date
Ed
8/22/2014
8/22/2014
8/22/2014
8/22/2014
8/22/2014
8/22/2014
Volatile Organic Compounds by EPA Method 8260B
Acetone I 8260B
0.230
ND
ND
ND
ND
ND
100000
24
Polynuclear Aromatic Hydrocarbons (PAH) by EPA Method 8270C
All Target Analytes I 8270C
I ND
ND
ND
ND
ND
ND
NA
NA
Notes:
All concentrations are reported in milligrams per kilogram (mg/kg).
BOLD results exceed their respective Preliminary Health -Based PSRG and/or Protection of Groundwater PSRG
PSRG - Preliminary Soil Remediation
ft, bgs - feet below ground surface
ND - Not Detected NA - Not Applicable

TABLE 2
GROUNDWATER SAMPLING ANALYTICAL RESULTS
109 - 111 WEST LEWIS STREET
109 AND 111 WEST LEWIS STREET
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
ENVIROASSESSMENTS PROJECT NO. 14-9927.2
Sample ID
Analytical
Method
TMW-1
TMW-2
TMW-3
TMW-4
MW-3*
NCAC 2L Groundwater
Standard
Gross Contamiantion
Level (GCL)
DWM Non -Residential Vapor Intrusion
Groundwater Screening Level (GWSL)
Collection Date
1 8/22/2014
8/22/2014
8/22/2014
8/22/2014
8/22/2014
Volatile Organic Compounds by EPA Method 8260B
Acetone
8260B
40.7
46.8
ND
ND
ND
6000
6000000
19000000
Benzene
8260B
59.8
ND
ND
ND
4.7
1
5000
69.3
Toluene
8260B
4.4
ND
ND
14.8
ND
600
260000
16100
Ethylbenzene
8260B
352
77.5
ND
668
65.8
600
84500
152
Xylenes, total
8260B
325
49.8
ND
1030
ND
500
85500
414
Naphthalene
8260B
316
99.9
4.0
420
53.9
6
6000
146
Tetrachloroethene (PCE)
8260B
ND
ND
ND
ND
13.1
0.7
700
48.4
Trichloroethene (TCE)
8260B
ND
ND
ND
ND
1.2
3
3000
4.35
Styrene
8260B
9.8
ND
ND
ND
ND
70
70000
7790
2-Butanone (MEK)
8260B
29.2
30.0
ND
ND
17.5
4000
4000000
1880000
Cis-1,2-Dichloroethene
8260B
ND
ND
ND
ND
2.8
70
70000
NE
p-Isopropyltoluene
8260B
ND
23.4
ND
ND
ND
25
11700
NE
2-Chlorotoluene
8260B
ND
ND
ND
58.3
ND
100
NE
NE
4-Methyl-2-Pentanone (MIBK)
8260B
31.3
13.2
ND
ND
ND
100
100000
466000
Polycyclic Aromatic Hydrocarbons (PAH) by EPA Method 8270C
Naphthalene
8270C
102
ND
ND
187
24.6
6
6000
146
1-Methylnaphthalene
8270C
14.9
ND
ND
16.7
13.7
1**
NE
NE
2-Methylnaphthalene
I 8270C
33.0
ND
ND
33.7
ND
30
NE
NE
Notes:
*MW-3 is located off -site to the northwest of the Site at 120 West Lewis Street (currently the Lotus Lounge).
**Interim Maximum Allowable Concentration (IMAC) Effective April 1, 2011.
All concentrations are reported in micrograms per liter(ug/L).
BOLD results exceed their respective NCAC 2L Groundwater Standard or IMAC
ND - Not Detected
NE - Not Established = Concentration exceeds the NCDENR, DWM Non -Residential Vapor Intrusion Groundwater Screening Level (GWSL).
NA - Not Applicable NCDENR - North Carolina Department of Environment and Natural Resources
NT - Not Tested DWM - Disvision of Waste Management

TABLE 3
SOIL -GAS ANALYTICAL RESULTS
109 - III WEST LEWIS STREET
109 AND III WEST LEWIS STREET
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
ENVIROASSESSMENTS, PLLC PROJECT NO. 14-9900.2
Sample ID
Analytical
Method
VP-1
Non -Residential Sub Slab and Exterior
Soil Gas Screening Level (SGSL)
Sample Date
8/22/2014
Volatile Organic Compounds by EPA Method T015
Acetone
T015
50.4
2720000
Benzene
T015
16.5
1570
Bromoform
T015
44.4
NE
Bromomethane
T015
2.3
438
2-Butanone (MEK)
T015
16.4
438000
Carbon Disulfide
T015
27.3
61300
Chlorobenzene
T015
3.2
4380
Chloroethane
T015
2.7
876000
Chloromethane
T015
4.3
7880
Cyclohexane
T015
14.4
526000
Dichlorodifluoromethane
T015
2.6
8760
Ethylbenzene
T015
12.1
4910
4-Ethyltoluene
T015
9.1
NE
n-Heptane
T015
16.2
NE
n-Hexane
T015
37.9
6130
2-Hexanone
T015
4.6
2630
Methylene Chloride
T015
63.2
52600
Naphthalene
T015
7.0
263
Styrene
T015
2.4
87600
Tetrachloroethene (PCE)
T015
8.2
3500
THC as Gas
T015
4370
NE
Toluene
T015
22.9
438000
1, 1, 1 -Trichloroethane
T015
2.6
438000
Trichloroethene (TCE)
T015
2.2
175
1,2,4-Trimethylbenzene
T015
25.9
613
1,3,5-Trimethylbenzene
T015
6.9
NE
Vinyl Chloride
T015
3.6
2790
m&p-Xylene
T015
29.5
8760
o-Xylene
T015
12.3
8760
Notes:
Samples collected 8/22/2014 for approximately 14 minutes.
All concentrations are reported in micrograms per cubic meter (ug/m3).
ND - Not Detected above laboratory reporting limits
NE - Not Established
DWM - Division of Waste Management
BOLD results exceed Exterior Soil Gas Screening Level established by the DWM (June 2014).
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.

TABLE 4
PIEZOMETER WELL CONSTRUCTIONIWATER LEVEL INFORMATION
109-111 WEST LEWIS STREET
109 and 111 WEST LEWIS STREET
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
ENVIROASSESSMENTS PROJECT NO. 14-9927.2
Relative
Water
Total Well
Screened
Top of Casing
DTW
Installation
Well Inner
Table
Well I.D.Depth
Interval
Relative
8/25/2014
Date
Diameter (in.)
Elevation
(ft.,bgs)
(ft., bgs)
Elevation (ft.)
(ft., TOC)
(ft.)
8/25/2014
MW-3
1/5/2003
2
15
5-15
99.72
9.54
90.18
TMW-1
8/22/2014
1
18
8-18
103.33
15.31
88.02
TMW-2
8/22/2014
1
20
10-20
102.41
14.19
88.22
TMW-3
8/22/2014
1
18
8-18
102.81
13.95
88.86
IL TMW-4
8/22/2014
1
20
10-20
1 103.56
15.33
1 88.23
bgs = below ground surface
TOC = top of casing.
DTW = depth to water.

APPENDICES

APPENDIX 1
PHASE II SITE PHOTOS

Site Photos —Phase II ESA
109-111 West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project Number: 14-9927.2
Photograph #1- Sub -slab vapor sample (VP-1) boring location (109 W. Lewis St.).
Photograph #2- Soil boring / temporary monitoring well (S-1 /TMW-1) boring location.
August2014

Site Photos —Phase II ESA August 2014
109-111 West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project Number: 14-9927.2
Photograph #3- Soil borings & temporary monitoring wells (S-1/TMW-1 & S-2/TMW-2) boring
locations.
Photograph #4- Soil boring S-3 / temporary monitoring well (S-3/TMW-3) boring location.

Site Photos —Phase II ESA
109-111 West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project Number: 14-9927.2
Photograph #5- Soil borings S-4 and S-5 (soil samples S-4-2 and S-5-2) locations.
Photograph #6- Soil borings S-6 / temporary monitoring well (TMW-4) boring location.
August2014

Site Photos —Phase II ESA
109-111 West Lewis Street
Greensboro, Guilford County, North Carolina
EA Project Number: 14-9927.2
August2014
Photograph #7- Off -site groundwater monitoring well MW-3 (Lotus Lounge; 120 W. Lewis St.).
Photograph #8- Off -site groundwater monitoring well MW-3 (Lotus Lounge; 120 W. Lewis St.).

APPENDIX 2
SOIL BORING AND WELL CONSTRUCTION LOGS

Boring /Well Construction Log
Well Construction Permit Number
I. D. Number
Project Name
Project No.
Geologist
Start Date
S-1 /TWM-1
109-111 West Lewis Street
14-9927.2
Mike McDermott
812212014 Complete Date 812512014
Purpose
Contractor
Registration No.
Driller
Equipment
Phase II ESA
Regional Probing Services
Truck -Mounted
Drilling Method: Direct Push Technology
Comments Inside 109 W. Lewis St. building, near western wall adjoining III W Lewis St. building. Southwest of vapor sample boring VP-1
OVM
Well Construction
Information
Depth
From - To
Soil / Rock Description / Comments
(pp-)
@ Depth (ft.)
Borehole Dia.
0 - 2"
Concrete
0.0 @ 2-6'
Riser Type
2"- 4'
Tan/red stiff clay and dark brown/black silt, no petrolum or solvent odor
0.5 @ 8"
Diameter
4 - 16'
Tan/red clayey silt, petroleum odor @ 8-16, moist @ 8-16'
0.7 @ 10'
Screen Type
16 - 18'
Brown/gray micaceous clayey silt, wet, strong petroleum odor
1.4 @ 12'
Diameter
6.4 @ 14'
Riser Interval
70.1 @ 16'
Screen Interval
Soil Sample S-1-2 collected @ 2' (1020 hrs)
162 @ 18'
Slot Size
Grout Type
Temporarymonitoring well (TMW-1) installed to 18' with screen @ 8-18'
Interval
DTW = 19.41 below TOC after well installation
Bentonite Type
Groundwater sample TMW-1 collected (1445 hrs)
Interval
Filter Pack
TWM-1 abandoned on 812512014
Interval
Total Depth
R.P.* Elevation
Datum
Water Level Information
Date
W.L.Below R.P.
-
R.P. = Reference Point W.L. = Water Level TBM= Temporary Benchmark MSL = Mean Sea Level
OVM= Organic Vapor Measurement * TOC = Top of casing GS = Ground surface

Boring /Well Construction Log
Well Construction Permit Number
I. D. Number
Project Name
Project No.
Geologist
Start Date
S-2 / TWM-2
109-111 West Lewis Street
14-9927.2
Mike McDermott
812212014 Complete Date 812512014
Purpose
Contractor
Registration No.
Driller
Equipment
Phase II ESA
Regional Probing Services
Truck -Mounted
Drilling Method: Direct Push Technology
Comments Inside 109 W. Lewis St. building, near western wall adjoining III W Lewis St. building. North of S-1/TMW--1 boring.
OVM
Well Construction
Information
Depth
From - To
Soil / Rock Description / Comments
(pp-)
@ Depth (ft.)
Borehole Dia.
0 - 2"
Concrete
0.0 @ 2-6'
Riser Type
2"- 12'
Tan/red clayey silt, moist @ 9-12', no petroleum or solvent odor
Diameter
12 - 20'
Brown/Gray micaceous clayey silt, moist @ 12-14 , wet @ 14-20', petroleum
Screen Type
odor
Diameter
Riser Interval
Soil Sample S-2-2 collected @ 2' (1100 hrs)
Screen Interval
Slot Size
Grout Type
Temporarymonitoring well (TMW-2) installed to 20' with screen @ 10-20'
Interval
DTW = 15.21 below TOC after well installation
Bentonite Type
Groundwater sample TMW-2 collected (1500 hrs)
Interval
Filter Pack
TWM-2 abandoned on 812512014
Interval
Total Depth
R.P.* Elevation
Datum
Water Level Information
Date
W.L.Below R.P.
-
R.P. = Reference Point W.L. = Water Level TBM= Temporary Benchmark MSL = Mean Sea Level
OVM= Organic Vapor Measurement * TOC = Top of casing GS = Ground surface

Boring /Well Construction Log
Well Construction Permit Number
I. D. Number
Project Name
Project No.
Geologist
Start Date
S-3 / TWM-3
109-111 West Lewis Street
14-9927.2
Mike McDermott
812212014 Complete Date 812512014
Purpose
Contractor
Registration No.
Driller
Equipment
Phase II ESA
Regional Probing Services
Truck -Mounted
Drilling Method: Direct Push Technology
Comments Northwest exterior of 109 W. Lewis St. building
OVM
Well Construction
Information
Depth
From - To
Soil / Rock Description / Comments
(pp-)
@ Depth (ft.)
Borehole Dia.
0 - 2"
Concrete
0.0 @ 2-6'
Riser Type
2"- 4'
Tan stiff clay, no petroleum or solvent odor
Diameter
4 - 12'
Tan/red clayey silt, no petroleum or solvent odor
Screen Type
12 - 16'
Tan/gray clayey silt, moist, slight petroleum odor
Diameter
16 - 18'
Tan sandy silt, moist, no petroleum or solvent odor
Riser Interval
Screen Interval
Probe refusal encountered @ 18'
Slot Size
Grout Type
Soil Sample S-3-2 collected @ 2' (1200 hrs)
Interval
Bentonite Type
Temporarymonitoring well (TMW-3) installed to 18' with screen @ 8-18'
Interval
DTW = 16.42 below TOC after well installation
Filter Pack
Groundwater sample TMW-3 collected (1530 hrs)
Interval
Total Depth
TWM-3 abandoned on 812512014
R.P.* Elevation
Datum
Water Level Information
Date
W.L.Below R.P.
-
R.P. = Reference Point W.L. =Water Level TBM= Temporary Benchmark MSL = Mean Sea Level
OVM= Organic Vapor Measurement * TOC = Top of casing GS = Ground surface

Boring /Well Construction Log
Well Construction Permit Number
I. D. Number
Project Name
Project No.
Geologist
Start Date
S-4
109-111 West Lewis Street
14-9927.2
Mike McDermott
812212014 Complete Date 812212014
Purpose
Contractor
Registration No.
Driller
Equipment
Phase II ESA
Regional Probing Services
Truck -Mounted
Drilling Method: Direct Push Technology
Comments Southern exterior of 109 W. Lewis St. building
OVM
Well Construction
Information
Depth
From - To
Soil / Rock Description / Comments
(pp-)
@ Depth (ft.)
Borehole Dia.
0 - 4'
Tan stiff clay, no petroleum or solvent odor
0.0 @ 2-8'
Riser Type
4 - 8'
Tan clayey silt, no petroleum or solvent odor
Diameter
Screen Type
Soil Sample 5-4-2 collected @ 2' (1310 hrs)
Diameter
Riser Interval
Boring backfilled with bentonite after sample collection
Screen Interval
Slot Size
Grout Type
Interval
Bentonite Type
Interval
Filter Pack
Interval
Total Depth
R.P.* Elevation
Datum
Water Level Information
Date
W.L.Below R.P.
-
R.P. = Reference Point W.L. =Water Level TBM= Temporary Benchmark MSL = Mean Sea Level
OVM= Organic Vapor Measurement * TOC = Top of casing GS = Ground surface

Boring /Well Construction Log
Well Construction Permit Number
I. D. Number
Project Name
Project No.
Geologist
Start Date
S-5
109-111 West Lewis Street
14-9927.2
Mike McDermott
812212014 Complete Date 812212014
Purpose
Contractor
Registration No.
Driller
Equipment
Phase II ESA
Regional Probing Services
Truck -Mounted
Drilling Method: Direct Push Technology
Comments Southern exterior of 111 W. Lewis St. building, west of soil boring S-4
OVM
Well Construction
Information
Depth
From - To
Soil / Rock Description / Comments
(pp-)
@ Depth (ft.)
Borehole Dia.
0 - 2'
Dark brown stiff clay, no petroleum or solvent odor
0.0 @ 2-8'
Riser Type
2 - 8'
Tan/red clayey silt, no petroleum or solvent odor
Diameter
Screen Type
Soil Sample 5-5-2 collected @ 2' (1330 hrs)
Diameter
Riser Interval
Boring backfilled with bentonite after sample collection
Screen Interval
Slot Size
Grout Type
Interval
Bentonite Type
Interval
Filter Pack
Interval
Total Depth
R.P.* Elevation
Datum
Water Level Information
Date
W.L.Below R.P.
-
R.P. = Reference Point W.L. =Water Level TBM= Temporary Benchmark MSL = Mean Sea Level
OVM= Organic Vapor Measurement * TOC = Top of casing GS = Ground surface

Boring /Well Construction Log
Well Construction Permit Number
I. D. Number
Project Name
Project No.
Geologist
Start Date
S-6 / TWM-4
109-111 West Lewis Street
14-9927.2
Mike McDermott
812212014 Complete Date 812512014
Purpose
Contractor
Registration No.
Driller
Equipment
Phase II ESA
Regional Probing Services
Truck -Mounted
Drilling Method: Direct Push Technology
Comments Southern exterior of 111 W. Lewis St. building, west of soil boring S-5.
OVM
Well Construction
Information
Depth
From - To
Soil / Rock Description / Comments
(pp-)
@ Depth (ft.)
Borehole Dia.
0 - 2'
Dark brown clayey silt, no petroleum or solvent odor
0.0 @ 2-6'
Riser Type
2 - 12'
Brown clayey silt, moist @ 8-12', no petroleum or solvent odor
Diameter
12 - 20'
Gray/tan silty sand, moist @ 12-16, wet @ 16-20 , solvent odor
Screen Type
Diameter
Soil Sample S-6-2 collected @ 2' (1345 hrs)
Riser Interval
Screen Interval
Temporarymonitoring well (TMW-4) installed to 20' with screen @ 10-20'
Slot Size
DTW = 15.45 below TOC after well installation
Grout Type
Groundwater sample TMW-4 collected (1430 hrs)
Interval
Bentonite Type
TWM-3 abandoned on 812512014
Interval
Filter Pack
Interval
Total Depth
R.P.* Elevation
Datum
Water Level Information
Date
W.L.Below R.P.
-
R.P. = Reference Point W.L. = Water Level TBM= Temporary Benchmark MSL = Mean Sea Level
OVM= Organic Vapor Measurement * TOC = Top of casing GS = Ground surface

Boring /Well Construction Log
Well Construction Permit Number
I. D. Number
Project Name
Project No.
Geologist
Start Date
VP-1
109-111 West Lewis Street
14-9927.2
Mike McDermott
812212014 Complete Date 812212014
Purpose
Contractor
Registration No.
Driller
Equipment
Phase II ESA
Regional Probing Services
Truck -Mounted
Drilling Method: Direct Push Technology
Comments Interior of] 09 W. Lewis St. building, near floor drain near the center of the building.
OVM
Well Construction
Information
Depth
From - To
Soil / Rock Description / Comments
(pp-)
@ Depth (ft.)
Borehole Dia.
0 - 4'
Tan stiff clay, no petroleum or solvent odor
Riser Type
Diameter
Vapor sample point and teflon tubing inserted to 3'
Screen Type
sand @ 2.5 - 4'
Diameter
Connected 1-Liter summa canister to sampling line
Riser Interval
Screen Interval
Initial vacuum = -27 inches Hg / Sample start time = 0950 hrs
Slot Size
Final vacuum = -3 inches Hg /sample end time = 1004 hrs
Grout Type
Interval
Bentonite Type
Interval
Filter Pack
Interval
Total Depth
R.P.* Elevation
Datum
Water Level Information
Date
W.L.Below R.P.
-
R.P. = Reference Point W.L. = Water Level TBM= Temporary Benchmark MSL = Mean Sea Level
OVM= Organic Vapor Measurement * TOC = Top of casing GS = Ground surface

APPENDIX 4
FIELD DATA SHEETS FOR SUB -SLAB VAPOR SAMPLING

FIELD DATA - VAPOR INTRUSION
PROJECT NAME: 1 09-1 11 W. Lewis Street
PROJECT ADDRESS: 149-11 1 W. Lewis Street
CITY, COUNTY, STATE: Greensboro, Guilford County, NC
IHSB NUMBER: V/19
EA PROJECT Nl iM A: 14-9927.2
Sample I❑
Sample Type (Circle One)
SLib-Slab I qkdoor Air 1 Soil -Gas
Sample Location
p ,Sol-,
Field MeaNuremena
Percent (%} Helium - Bucket
1 Time:
Percent {q/4} Helium - Tedlar Bag
&jh / Time:
Canister Number:
Canister Pressure (Hg) - START
Sample Collection START date
I Lf
Sample Collection START Time
Canister Pressure (1-1g) - END
Sample Collection END date
a�
Sample Collection END Time
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Attachment D

VaporP no
Using Vapor Pins® for Source Characterization
The Vapor Pin® is ideally suited for locating Volatile Organic Compound (VOC) contamination
sources beneath pavement. Our experience is that most sites have sources of contamination that
in addition to those associated with underground tanks and degreasing areas. Unsuspected
source areas often correspond to former exterior doors that were obscured by later building
expansion. Cox -Colvin has located such sources equipped with little more than some Vapor
Pins®, a hammer drill, and a multi -gas meter.
Cox-Colvin's approach to VOC source investigation consists of installing Vapor Pins® along a
grid, allowing the points to equilibrate, and collecting readings with a multi -gas meter. With a
team of two people, we've installed as many as 90 Vapor Pins® in one day, and sampled,
removed the Vapor Pins®, and plugged the holes on the following day.
For source characterization, we normally install brass Vapor Pins® in the stick-up configuration
on a grid spacing of 20 to 30 feet. We cover the Vapor Pins® with traffic cones and allow them
to equilibrate for at least an hour. We then collect field readings with a hand-held multi -gas
meter capable of measuring VOCs via Photo -Ionization Detector (PID), oxygen (02), and Lower
Explosive Limits (LEL). The PID indicates VOC sources. 02 in soil gas is normally lower than
in air, but unusually low levels (<5%), especially with high LEL readings, are characteristic of
methane generation (methanogenesis). Methanogenesis occurs when non -chlorinated solvents or
other organic matter degrades at too high a rate for 02 replenishment.
After collecting field readings at all of the sample points, samples are collected from locations
with elevated PID readings, and submitted to a laboratory for confirmation. Samples can be
collected into evacuated glass vials, Bottle Vacs, Tedlar bags, Summa canisters, sorbent tubes,
and potentially other devices. Some containers do not offer low enough reporting levels for
vapor intrusion sampling, but low levels are probably not needed for locating contaminant
sources.
At the conclusion of sampling, remove the Vapor Pins® and fill the holes with hydraulic cement
or caulk. Urethane and polyurethane caulks are recommended by radon mitigation guidance for
filling holes and cracks, but they contain VOCs that could interfere with subsequent sampling.
Hydraulic cement does not contain VOCs, but it sets up quickly, making it potentially difficult to
fill borings to total depth.
After removing the silicone sleeve and other plastic parts from the Vapor Pins®, decontaminated
them for reuse. Cox -Colvin has a number of Vapor Pins® that they have used an average of
seven or eight times with no breakage or damage.
K:\CCA\BD\Vapor Pin\Procedures\Using Vapor Pins for Source Characterization.docx
Vapor Pin Enterprises, Inc.

® Standard Operating Procedure
VaporP i Use of the VAPOR PIN® Drilling
Elowns_ Guide and Secure Cover
INNUM5 Updated March 16, 2018
Scope:
This standard operating procedure (SOP)
describes the methodology to use the VAPOR
PIN® Drilling Guide and Secure Cover to
install and secure a VAPOR PIN® in a flush
mount configuration.
Purpose:
The purpose of this SOP is to detail the
methodology for installing a VAPOR PIN®
and Secure Cover in a flush mount
configuration. The flush mount
configuration reduces the risk of damage to
the VAPOR PIN® by foot and vehicular traffic,
keeps dust and debris from falling into the
flush mount hole, and reduces the
opportunity for tampering. This SOP is an
optional process performed in conjunction
with the SOP entitled "Installation and
Extraction of the VAPOR PIN®". However,
portions of this SOP should be performed
prior to installing the VAPOR PIN®.
Equipment Needed:
• VAPOR PIN® Secure Cover (Figure 1);
0 VAPOR PIN® Drilling Guide (Figure 2);
0 Hammer drill;
• 11/2-inch diameter hammer bit (Hilti' TE-
YX 11/2" x 23" #00293032 or equivalent);
• 5/8-inch diameter hammer bit (HiltiT" TE-
YX 5/8" x 22" #00226514 or equivalent);
• assembled VAPOR PIN®;
• # 14 spanner wrench;
• Wet/Dry vacuum with HEPA filter
(optional); and
• personal protective equipment (PPE).
Figure 1. VAPOR PIN® Secure Cover
Figure 2. VAPOR PIN® Drilling Guide
Installation Procedure:
1) Check for buried obstacles (pipes,
electrical lines, etc.) prior to proceeding.
2) Set up wet/dry vacuum to collect drill
cuttings.
3) While wearing PPE, drill a 1 1/2-inch
diameter hole into the concrete slab to a
depth of approximately 1 3/4 inches.
Pre -marking the desired depth on the drill
VAPOR PIN' protected under US Patent # 8,220,347 B2, US 9,291,531 B2 and other patents pending
Vapor Pin Enterprises, Inc. • 7750 Corporate Blvd., Plain City, Ohio 43064 • [phone] • www.vaporpin.com

bit with tape will assist in this process.
4) Remove cuttings from the hole and place
the Drilling Guide in the hole with the
conical end down (Figure 3). The hole is
sufficiently deep if the flange of the
Drilling Guide lies flush with the surface
of the slab. Deepen the hole as
necessary, but avoid drilling more than 2
inches into the slab, as the threads on the
Secure Cover may not engage properly
with the threads on the VAPOR PIN®.
Figure 3. Testing Depth with the Drilling
Guide
5) When the 11/2-inch diameter hole is
drilled to the proper depth, replace the
drill bit with a 5/8-inch diameter bit,
insert the bit through the Drilling Guide
(Figure 4), and drill through the slab. The
Drilling Guide will help to center the hole
for the VAPOR PIN®, and keep the hole
perpendicular to the slab.
6) Remove the bit and drilling guide, clean
the hole, and install the VAPOR PIN® in
accordance with the SOP "Installation and
Extraction of the VAPOR PIN®.
Standard Operating Procedure
Installation and Removal of the Vapor Pin®
Updated March 16, 2018
Pacre 2
Figure 4. Using the Drilling Guide
7) Screw the Secure Cover onto the VAPOR
PIN® and tighten using a # 14 spanner
wrench by rotating it clockwise (Figure 5).
Rotate the cover counter clockwise to
remove it for subsequent access.
Figure 5. Tightening the Secured Cover
1 imitation -,-
On slabs less than 3 inches thick, it may be
difficult to obtain a good seal in a flush
mount configuration with the VAPOR PIN.®
VAPOR PIN' protected under US Patent # 8,220,347 132, US 9,291,531 B2 and other patents pending
Vapor Pin Enterprises, Inc. • 7750 Corporate Blvd., Plain City, Ohio 43064 • [phone] • VaporPin.CoxColvin.com

VaporPMINOMM-_
INNUM��
Scope:
The operating procedure describes
methodology to test a VAPOR PIN®
equivalent sub -slab sampling device
leakage of indoor air.
Purpose:
Standard Operating Procedure
Leak Testing the VAPOR PIN®
Via Water Dam
Updated March 16, 2018
vacuum is recommended. Any remaining
dust can be picked up with a piece of
the scrap Play -Doh or modeling clay.
or
for 3)
The purpose of this procedure is to assess the
potential for indoor air to leak past the
VAPOR PIN ® and dilute the sub -slab soil gas
sample. 4)
Equipment Needed:
• VAPOR PIN® water dam
• Play -Doh or VOC free modeling clay
• distilled water 5)
• VAPOR PIN® and associated sample
tubing.
Procedure:
1) Drill a 5/8" diameter hole in the concrete
slab and install the VAPOR PIN® as per
the Standard Operating Procedure (SOP). 6)
2) Clean the slab within
the VAPOR PIN® to
wetting the concrete
concrete is dry befc
avoid cleaning wil
substances. A whisl
a 2-inch radius of
move dust. Avoid
or wait until the
e proceeding and
VOC-containing
broom or shop
Roll a 1-inch diameter ball of Play -Doh or
modeling clay between your palms to
form a "snake" approximately 7 inches
long and press it against the end of the
pipe couple. Push the couple against the
slab to form a seal between the pipe and
the concrete.
Attach the sample tubing to the top of
the VAPOR PIN® and pour enough
distilled water into the pipe couple to
immerse base of the VAPOR PIN®, and if
desired, the tubing connection at the top
of the VAPOR PIN®.
Purge the sample point as required by the
data quality objectives. Concrete will
absorb some of the water, which is
normal; however, if water is lost to the
sub -slab, stop, remove the water from the
couple, and reposition the VAPOR PIN® to
stop the leakage. Reseat the leak test
equipment, if needed.
If the VAPOR PIN® is installed in the
flush -mount configuration, the larger
hole can be filled with water in place of
the plastic pipe fitting and Play -Doh or
modeling clay.
VAPOR PIN't protected under US Patent # 8,220,347 B2
Vapor Pin Enterprises, Inc. • 7750 Corporate Blvd., Plain City, Ohio 43064 • [phone] • www.vaporpin.com

Attachment E

aceAnalytical
Pace Analytical Services, LLC
Method Detection Limits and Reporting Limits
by EPA TO15 SIM Scan
LCS DUP
Analyte
CAS #
MDL (ppbv)
PRL (ppbv)
MW
MDL (Ug/m3)
PRL (Ug/m3)
Lower
Upper
RPD
1, 1, 1 -Trichloroethane
71-55-6
0.00448
0.01
133.4047
0.0248
0.0555
56
133
25
1,1,2,2-Tetrachloroethane
79-34-5
0.00552
0.01
167.8498
0.0385
0.0698
57
146
25
1,1,2-Trichloroethane
79-00-5
0.00482
0.01
133.4047
0.0267
0.0555
54
146
25
1,1,2-Trichlorotrifluoroethane
76-13-1
0.0724
0.2
187.3762
0.564
1.56
63
139
25
1,1-Dichloroethane
75-34-3
0.00362
0.01
98.9596
0.0149
0.0411
63
130
25
1,1-Dichloroethene
75-35-4
0.00500
0.01
96.9438
0.0202
0.0403
59
138
25
1,2,4-Trichlorobenzene
120-82-1
0.493
1
181.4487
3.72
7.54
60
133
25
1,2,4-Trimeth (benzene
95-63-6
0.0904
0.2
120.1938
0.452
1.00
70
137
25
1,2-Dibromoethane
106-93-4
0.00483
0.01
187.8616
0.0377
0.0781
55
148
25
1,2-Dichlorobenzene
95-50-1
0.0814
0.2
147.0036
0.498
1.22
70
137
25
1,2-Dichloroethane
107-06-2
0.00732
0.01
98.9596
0.0301
0.0411
61
130
25
1,2-Dichloropropane
78-87-5
0.00262
0.01
112.9864
0.0123
0.0470
60
140
25
1,3,5-Trimethylbenzene
108-67-8
0.0798
0.2
120.1938
0.399
1.00
70
133
25
1,3-Butadiene
106-99-0
0.00956
0.01
54.0914
0.0215
0.0225
65
138
25
1,3-Dichlorobenzene
541-73-1
0.0951
0.2
147.0036
0.581
1.22
70
137
25
1,4-Dichlorobenzene
106-46-7
0.164
0.5
147.0036
1.00
3.06
70
134
25
2-Butanone (MEK)
78-93-3
0.123
1
72.1057
0.369
3.00
65
143
25
2-Hexanone
591-78-6
0.179
1
100.1589
0.745
4.16
60
148
25
2-Propanol
67-63-0
0.279
1
60.1
0.697
2.50
65
135
25
4-Ethyltoluene
622-96-8
0.114
0.5
120.1938
0.570
2.50
70
132
25
4-Methyl-2-pentanone (MIBK)
108-10-1
0.124
1
100.1602
0.518
4.16
70
135
25
Acetone
67-64-1
0.499
1
58.0798
1.21
2.41
59
132
25
Benzene
71-43-2
0.00496
0.01
78.1134
0.0161
0.0325
59
133
25
Benzyl Chloride
100-44-7
0.228
0.5
126.58
1.20
2.63
56
150
25
Bromodichloromethane
75-27-4
0.00412
0.01
163.8289
0.0281
0.0681
60
133
25
Bromoform
75-25-2
0.135
0.5
252.7309
1.42
5.25
69
150
25
Bromomethane
74-83-9
0.0575
0.2
94.9387
0.227
0.789
61
141
25
Carbon Disulfide
75-15-0
0.0692
0.2
76.131
0.219
0.633
66
134
25
Carbon tetrachloride
56-23-5
0.00515
0.01
153.823
0.0329
0.0639
56
138
25
Chlorobenzene
108-90-7
0.0588
0.2
112.5585
0.275
0.936
70
130
25
Chloroethane
75-00-3
0.0969
0.2
64.5145
0.260
0.536
65
143
25
Pace Analytical Services, LLC 612-607-1700
KL 8/2/18 1700 Elm Street SE, Suite 200 Minneapolis, MN 55414 www.pacelabs.com

aceAnalytical
Pace Analytical Services, LLC
Method Detection Limits and Reporting Limits
by EPA TO15 SIM Scan
LCS DUP
Analyte
CAS #
MDL (ppbv)
PRL (ppbv)
MW
MDL (Ug/m3)
PRL (Ug/m3)
Lower
Upper
RPD
Chloroform
67-66-3
0.00426
0.01
119.3779
0.0211
0.0496
66
130
25
Chloromethane
74-87-3
0.0742
0.2
50.4877
0.156
0.420
58
140
25
cis-1,2-Dichloroethene
156-59-2
0.00348
0.01
96.9438
0.0140
0.0403
65
130
25
cis-1,3-Dichloropropene
10061-01-5
0.00588
0.01
110.9706
0.0271
0.0461
40
150
25
Cyclohexane
110-82-7
0.101
0.5
84.1608
0.353
1.75
70
133
25
Dibromochloromethane
124-48-1
0.0830
0.2
208.2799
0.719
1.73
46
145
25
DichlorodifIuoromethane
75-71-8
0.0584
0.2
120.9138
0.293
1.01
69
130
25
Dichlorotetrafluoroethane
76-14-2
0.0615
0.2
170.9216
0.437
1.42
68
130
25
Ethanol
64-17-5
0.424
1
46.07
0.812
1.92
65
146
25
Ethyl Acetate
141-78-6
0.0518
0.2
88.106
0.190
0.733
68
136
25
Ethyl Benzene
100-41-4
0.0690
0.2
106.167
0.305
0.883
70
133
25
Hexachlorobutadiene
87-68-3
0.181
0.5
260.762
1.97
5.42
59
140
25
m&p-Xylene
106-42-3
0.158
0.4
106.167
0.699
1.77
70
133
25
Methyl Tert Butyl Ether
1634-04-4
0.181
1
88.1492
0.663
3.66
70
132
25
Methylene chloride
75-0902
0.267
1
84.9328
0.944
3.53
67
132
25
Naphthalene
91-20-3
0.248
0.5
128.1732
1.32
2.66
55
136
25
n-Heptane
142-82-5
0.0913
0.2
100.2034
0.380
0.833
64
136
25
n-Hexane
110-54-3
0.0867
0.2
86.1766
0.311
0.716
70
130
25
o-Xylene
95-47-6
0.0780
0.2
106.167
0.344
0.883
70
132
25
Propylene
115-07-1
0.0816
0.2
42.0804
0.143
0.350
37
150
25
Styrene
100-42-5
0.0794
0.2
104.1512
0.344
0.866
70
139
25
Tetrachloroethene
127-18-4
0.00440
0.01
165.834
0.0303
0.0689
142
25
Tetrahydrofuran
109-99-9
0.0870
0.2
72.1066
0.261
0.600
62
141
25
Toluene
108-88-3
0.0916
0.2
92.1402
0.351
0.766
70
130
25
trans-1,2-dichloroethene
156-60-5
0.00520
0.01
96.9438
0.0210
0.0403
67
131
25
trans-1,3-Dichloropropene
10061-02-6
0.00610
0.01
110.9706
0.0281
0.0461
34
150
25
Trichloroethene
79-01-6
0.00563
0.01
131.3889
0.0308
0.0546
58
141
25
Trichlorofluoromethane
75-69-4
0.0641
0.2
137.3684
0.366
1.14
59
140
25
Vinyl Acetate
108-05-4
0.0754
0.2
86.0902
0.270
0.716
57
150
25
Vinyl chloride
75-01-4
0.00985
0.01
62.4987
0.0256
0.0260
61
136
25
SIM analytes on 10AIR7 only.
Pace Analytical Services, LLC 612-607-1700
KL 8/2/18 1700 Elm Street SE, Suite 200 Minneapolis, MN 55414 www.pacelabs.com

ace Analytical
Pace Analytical Services, LLC
Method Detection Limits and Reporting Limits
by EPA T015 SIM Scan
EXTRA ANALYTES (available upon request at an additional cost)
LCS I DUP
Analyte
CAS #
MDL (ppbv)
PRL (ppbv)
MW
MDL (ug/m3)
PRL (ug/m3)
Lower
Upper
RPD
1,2,3-Trimethyl benzene
526-73-8
0.0807
0.2
120.19
0.403
1.00
69
150
25
1,4-Dioxane
123-91-1
0.205
1
88.1051
0.751
3.66
70
145
25
2,2,4-Trimethylpentane
540-84-1
0.145
0.5
114.22
0.689
2.37
70
140
25
Acrolein
107-02-8
0.237
0.5
56.06
0.553
1.17
65
150
25
Acrylonitrile
107-13-1
0.145
0.5
53.06
0.320
1.10
64
142
25
Allyl Chloride
107-05-1
0.234
0.5
76.525
0.744
1.59
60
147
25
Chlorodifluoromethane
75-45-6
0.184
0.5
86.47
0.662
1.80
68
142
25
Di -isopropyl Ether
108-20-3
0.0795
1
102.1748
0.338
4.25
70
136
25
Ethyl Tert-Butyl Ether
637-92-3
0.175
1
102.1748
0.741
4.25
70
136
25
Isopentane
78-78-4
0.0997
0.5
72.15
0.299
1.50
44
150
25
Isopropyl benzene
98-82-8
0.0762
0.5
120.194
0.381
2.50
70
133
25
Methyl Methacrylate
80-62-6
0.0951
0.2
100.12
0.396
0.832
47
150
25
Methylcyclohexane
108-87-2
0.0950
0.5
98.186
0.388
2.04
70
137
25
N-Butylbenzene
104-51-8
0.201
0.5
134.2206
1.12
2.79
70
148
25
N-Propylbenzene
103-65-1
0.0805
0.5
120.1938
0.402
2.50
70
145
25
p-Isopropyltoluene
99-87-6
0.0922
0.2
134.22
0.515
1.12
70
143
25
Sec- Butylbenzene
135-98-8
0.155
0.5
134.2206
0.866
2.79
70
142
25
Tert Amyl Methyl Ether
994-05-8
0.243
1
102.1748
1.03
4.25
70
135
25
Tert Butyl Alcohol (TBA)
75-65-0
0.326
1
74.12
1.00
3.08
63
143
25
Tert-Butyl Benzene
98-06-6
0.0959
0.2
134.22
0.535
1.12
70
142
25
Vinyl Bromide
593-60-2
0.0810
0.2
106.95
0.360
0.889
70
140
25
THC as Gas (C4-C12)
11.95
23.90
51.9
104
59
150
25
Xylene (Total)
1330-20-7
0.1583
0.6
106.17
0.699
2.65
70
138
25
Surrogates
1,4-Dichlorobenzene-d4 (S)
3855-82-1
30
150
Hexane-d14 (S)
21666-38-6
30
150
Toluene-d8 (S)
2037-26-5
30
150
Highlighted cells are calculated results
Pace Analytical Services, LLC 612-607-1700
KL 8/2/18 1700 Elm Street SE, Suite 200 Minneapolis, MN 55414 www.pacelabs.com

Attachment F

aceAnalytical
AIR CANISTERS
Instructions for canister Grab Sampling
(Tools needed: one ended 9/16" wrench)
1. INSPECTION — Inspect your canister shipment upon
arrival. Compare the contents with the packing slip
and notify Pace Analytical of any discrepancy or dam-
age. Familiarize yourself with the contents you received
by comparing them to the pictures on the right. Do not
open the valve until you are ready to sample. Even a
small loss of vacuum will compromise your sample.
2. CONNECTION — Remove the brass cap from the top
of the can with a 9/16" wrench. If you are connecting to
a predetermined sampling point you may have received
the following: 6 inches of '/4 inch OD Teflon tubing, '/4
inch Swagelock® nut, ferrule, spacer nut and moisture
filter (if requested). Connect these items in series us-
ing the pictures on the right as a guide. The spacer fits
between the nut and the ferrule. The ferrule must be
pointed down toward the canister. Please note the con-
nection to the canisters utilizes Swagelock® threading.
For a proper connection, it's important that no cross -
threading occurs. The canister connection is made by
hand -tightening the Swagelock@ nut. Once connected,
use an open ended (9/16") wrench to further tighten the
connection. Make sure that the connection is firmly tight-
ened. The final connection must be leak tight recognizing
also that over -tightening can cause leaks as well. Do
not use pliers or adjustable -end wrenches to tighten this
Swagelock® connection. Use only open ended wrench-
es for tightening. The canister is now ready for sampling.
3. SAMPLING — To begin sampling simply open the
canister valve (you may have either a rotary valve or
a toggle valve). One full turn counter clockwise for the
rotary valve is sufficient. The toggle valve will open
by flipping upward. During the initial sampling pro-
cess you will hear a rush of air. Without a flow restric-
tion the canister will fill in approximately 30-45 seconds.
4. COMPLETION — After sampling is complete, close
the canister valve. Disassemble the components and
return them in the original shipping package they were
received in. Verify the contents for return to the labo-
ratory. Complete the Chain -of -Custody form and re-
turn with the samples to the laboratory. Be sure to
reference the canister ID on the Chain -of -Custody.
Grab Sample Configuration
'++ — Moisture Filter
1/4" OD Teflon Tubing
1/4" Swagelock®
Nut
,w Spacer nut
Fe'r. ale
Canister lnlef
Canister 1D —
;.Rotary Valve
-z�jjl!�.F
1 d
1
i H
F
¢
E
---3 Sampl&ll) Tag
I tM
MK
www.pacelabs.com
©2009 Pace Analytical Services Air Lab 1700 Elm Street, Minneapolis MN 55414
Questions? Please call the Air Technical phone number 612-607-6386

...rim
--/I1•k;g111c7,rnu.,rir.'I'IakigluS,d„fio„v SamplingInstructions
Restricted flow Sampler
Intended Applications:
30 minute sampling of 6 Liter Canister 5 minute sampling of 1 Liter Canister
All media is pre -assembled for your convenience
Do not attempt to remove the gauge from the canister
Inspect your media
• Remove the protective foam inserts and other packing material from
the box. Set these inserts aside for return shipment
• Lift and carry the canister by the frame ring near the top.
• Review the contents of the package to ensure you have everything you need
prior to sampling.
• Consult your Pace Project Manager, or call the Air Technical Hotline @
612-607-6386 if you have any questions.
Prepare for Sampling (Figure 1)
• Before sampling, you will first verify the initial vacuum.
• With the brass cap on the assembly still in place, open the canister to check
the initial vacuum.
o Rotary Valve requires on full turn counter clockwise
o Toggle Valve requires that you flip the valve upwards
• Record initial vacuum_ on the Chain of Custody
o Initial field reading (-inches of Fig)
• Close the canister valve before moving on to next step.
Collect Samples (Figure 2)
• Remove the brass cap from the side of the sampling assembly by turning
counter clockwise with a 9/16 inch wrench. (Figure 2)
• Position the canister for sampling
o NOTE: If tubing and fittings are required at this site, you will find
these items and all instructions in the enclosed plastic bag.
• Connect the sampling line as shown in the picture on the right. Open the
canister valve to begin sampling
• The Decline in vacuum should be proportional to the'collection time. After
desired sampling time, close canister valve.
o NOTE: The canister will continue to fill until the internal: pressure
reaches ambient conditions ftsig). You are responsible for
closing the valve on the canister at the desired time.
• To end the sampling process close the valve on the canister and replace
brass cap to the side of the gauge.
• Verify final field vacuum by opening the canister.
o Record the —inches of Hg on the COC.
o Close canister valve
Return Samples
• Repackage the canister with the protective foam insert, and other packaging
materials, to insure the integrity of your sample as it travels back to the lab.
• Complete the shipping and COC documents
• Return to Pace Analytical for analysis.
• Return all components in the package as you received them. Complete a
Chain of Custody record and return with the sample to Pace Analytical for
analysis.
Figure 1
Verify the initial vacuum.
Sample Connection
Point
Figure 2
Remove the brass cap and connect the
sampling line
www.pacelabs.com

®®� ® � ® !-
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Analytical = =_ = : =_
-- — — — — --
_®
-- —law
aw �® --
Sampling Instructions for t-CANS
Preassembled Air Canisters
UnpaCK EZ-CANS
1. Remove the protective EZ-CANS foam insert from the box
and retain it for return shipping.
2. To remove from the box, lift and carry EZ-CANS by the
frame ring near the top of the canister. Avoid lifting by the
flow controller or any part of the sampling assembly.
3. EZ-CANS are completely preassembled, leak -checked
t�
and ready to go.
Prepare to Sample
1. Review the contents of the package to insure you have
everything you need.
2. Remove the brass cap from the top of the sampling
assembly by turning counter clockwise. It should be
finger tight, if necessary use a 9/16" wrench.
3. Position the EZ-CANS for sampling. NOTE: If tubing and
fittings are needed to sample subsurface or a hard to
reach area, you will find these items and instructions in an
enclosed plastic bag.
Begin Sampling
1. Open the canister valve to begin sampling. Pace uses two
valve styles:
a. Rotary: One full turn counter clockwise
b. Toggle: Flip the valve upward
2. The decline in vac;uulii should be directly proportional to
the collection time.
3. Record initial vacuum on the Chain Of Custody.
"Initial Field reading (-inches of Hg)
End Sampling
1. Close the canister valve and record the vacuum gauge
reading on the Chain of Custody. Final Field reading
(-inches of Hg)
2. Reattach the brass cap to the top of the sampling
assembly.
3. Repack the canister using the protective foam insert to
insure the integrity of your sample.
4. Complete the shipping and COC documents and call the
carrier for pickup.
Questions? Call 612-601-6386
%J
Brass Cap
www. pacelabs. com
@2010 Pace Analytical Services Air Lab
Return to Pace Analytical @ 1700 Elm Street, Minneapolis MN 55414
Questions? Please call the Air Technical phone number 612-607-6386