22047_University Place Mall_DC680002_202010924_SG and GW Report

AECOM AECOM Technical Services of North Carolina, Inc. 919.461.1100 tel
1600 Perimeter Park Drive, Suite 400 919.461.1415 fax
Morrisville, NC 27560
September 24, 2020
North Carolina Department of Environmental Quality
Division of Waste Management — DSCA Program
1646 Mail Service Center
Raleigh, NC 27699
Att: Mr. Mike Cunningham
DSCA Project Manager
Re: Soil Gas and Groundwater Sampling Report
American Dry Cleaners DSCA Site ID #DC680002
201 South Estes Drive, Chapel Hill, Orange County, North Carolina
Dear Mr. Cunningham:
AECOM Technical Services of North Carolina, Inc. (includes legacy URS and legacy AECOM
herein referred to as AECOM) is pleased to provide the attached Soil Gas and Groundwater
Sampling Report for the American Dry Cleaners (#DC680002) site located at 201 South Estes Drive,
Chapel Hill, North Carolina. This report includes documentation pertaining to the soil gas and
limited groundwater sampling activities that were completed at the site in June and August 2020. The
activities documented herein were completed in accordance with State Lead Authorization for Work
(SLAW) 029, as approved on March 9, 2020.
Assessment activities at the American Dry Cleaners site have identified groundwater contaminated
with dry cleaning solvents (primarily tetrachloroethene [PCE] and associated breakdown products)
that is migrating offsite to the east-southeast and beneath the Olin T. Binkley Baptist Church
property. Soil gas assessment activities completed on the Olin T. Binkley Baptist Church property
indicate contaminant concentrations exceeding the calculated soil gas to indoor air vapor intrusion
risk levels. Based on the potential for vapor intrusion to affect indoor air quality due to groundwater
and soil gas contaminant concentrations, indoor air samples have been collected in select preschool
classrooms located in the education wing at the Olin T. Binkley Baptist Church since 2010,
including:
• June 2015 and January 2016 - Results of Indoor Air Sampling, dated February 2016;
• June 2016 - Results of Indoor Air Sampling, dated July 2016;
• December 2016 - Groundwater and Vapor Monitoring Report, dated January 2017;
• June and December 2017 - Indoor Air and Soil Gas Sampling Report, dated January 2018;
• June 2018, June and December 2018, January and February 2019 - Indoor Air, Soil Gas, and
Groundwater Sampling Report, dated March 2019;
• June 2019 - Indoor Air and Soil Gas Sampling Report, dated July 2019 and Updated Risk
Calculator for the June 2019 Indoor Air Sampling Event letter, dated September 2019; and
• December 2019 - Indoor Air, Soil Gas, and Ductwork Air Sampling Report, dated January
2020.
As referenced in the above listed documents, indoor air results from each of the sampling events
collected through December 2019 were within acceptable risk levels given current residential land
use based on the presence of a church and daycare/preschool facility.

AECOM
Mr. Mike Cunningham
American Dry Cleaners DC680002
September 24, 2020
Page 2 of 4
As part of vapor intrusion sampling activities, soil gas samples have been collected from permanent
soil gas sample points SV-5 and SV-6R which are located in close proximity to the Olin T. Binkley
Church preschool wing. However, during the most recent sampling event completed in December
2019, soil gas sampling point SV-6R could not be sampled due to the presence of water in the soil
gas sample point. As the integrity of soil gas sampling point SV-6R has likely been affected by
seepage of stormwater runoff around the seal within the annular space of the soil gas point, AECOM
proposed to replace this soil gas sampling point in a fresh borehole in close proximity to soil gas
sampling point SV-6R. Additionally, AECOM proposed to install three additional soil gas sampling
points (SV-7, SV-8, and SV-9) to further evaluate potential vapor intrusion to affect indoor air
quality in the portion of the church to the east of the education wing.
Additionally, as many of the monitoring wells have not been sampled since 2013, AECOM proposed
the collection of groundwater samples from six monitoring wells (MW-1, MW-3, MW-5, 2W-10,
2W-11, and 2W-12) located on the Olin T. Binkley Church property to further monitor plume
stability and groundwater contaminant dynamics.
On June 10, 2020, AECOM performed a limited groundwater sampling event pursuant to work
authorized under SLAW029, dated March 9, 2020. Groundwater sampling was completed using
standard purge and sample techniques using a disposable bailer, in accordance with the attached
groundwater sampling SOP (Attachment 19). Groundwater samples were submitted to Pace
Analytical Laboratory on June 10, 2020 for analysis of volatile organic compounds (VOCs) by
Method 8260. An updated potentiometric surface contour map using depth to water levels gauged on
June 6, 2020, is included as Attachment 6. Groundwater flow is to the southeast, which is consistent
with historic groundwater flow data. Laboratory analysis of the groundwater samples indicated the
presence of CVOCs above NC 2L Groundwater Quality Standards in monitoring wells MW-1, MW-
3, MW-5, 2W-10, 2W-11, and 2W-12. A groundwater quality summary map is included as
Attachment 7. Groundwater analytical data is summarized in ADT Table 8. Groundwater -to -
Indoor Air Risk Calculators are included in Attachment 16.
According to the Mann -Kendall Trend Analysis worksheets, included in Attachment 17,
concentrations of PCE are stable in monitoring well MW-3 and decreasing in monitoring wells 2W-
10 and 2W-11. Additionally, concentrations of TCE are decreasing in 2W-10 and demonstrate no
trend in MW-3 and 2W-11.
Soil gas quality monitoring has been occurring on the Olin T. Binkley Church property concurrent
with the indoor air quality monitoring discussed in Section 2.0. Historical soil gas quality data has
indicated the potential for vapor intrusion to affect indoor air quality above acceptable risk levels for
residential and non-residential exposure. However, subsequent ongoing monitoring of indoor air
quality, as discussed in section 2.0, has indicated that indoor air quality remains within acceptable
levels for current property usage. As part of the continued monitoring of soil gas quality, AECOM
collected a soil gas sample from soil gas monitoring point SV-5 on August 11, 2020. As previously
documented a sample was not recently collected from soil gas sampling point SV-6R due to the
presence of water inside the sample point and the sample point was considered to be damaged.
Therefore, on August 11, 2020 a replacement sampling point (SV-6RR) was installed in the same
location as SV-6R. Additionally, three soil gas points (SV-7, SV-8, and SV-9) were installed on
August 11, 2020 along the western portion of the main church building. The newly installed soil gas
sampling points were completed within a steel manhole with an approximate 18-inch square concrete
pad at ground surface. Soil gas sampling points were installed in accordance with the attached soil
gas installation SOP (Attachment 20).

A=COM
Mr. Mike Cunningham
American Dry Cleaners DC680002
September 24, 2020
Page 3 of 4
Soil gas samples were collected from the five soil gas sampling points (SV-5, SV-6RR, SV-7, SV-8,
and SV-9) into 6-liter summa canisters fitted with a 30-minute flow controller in accordance with the
attached AECOM soil gas sampling SOP (Attachment 20). Each sample was analyzed for five
DSCA contaminants of concern: PCE, TCE, cis-1,2-DCE, trans-1,2-DCE, and vinyl chloride using
EPA Method TO-15. Sampling results and locations are shown on Attachment 14. A summary of
the soil gas quality results, as entered into August 2019 DSCA risk calculators for both residential
and non-residential exposure, is provided as follows:
• SV-5 (8/11/20) — non-residential worker
o Acceptable cumulative carcinogenic risk between 1E-04 and 1 E-05 (3.3E-05); and,
o Unacceptable hazard index is greater than 1 (11).
• SV-5 (8/11/20) - resident
o Acceptable cumulative carcinogenic risk between 1 E-03 and 1 E-04 (1.7E-04); and,
o Unacceptable hazard index is greater than 1 (42).
• SV-6RR (8/11/20) — non-residential worker
o Acceptable cumulative carcinogenic risk between 1 E-05 and 1 E-06 (3.2E-06); and,
o Acceptable hazard index is less than 1 (0.96).
• SV-6RR (8/11/20) - resident
o Acceptable cumulative carcinogenic risk between 1 E-04 and 1 E-05 (4.9E-05); and,
o Unacceptable hazard index is greater than 1 (12).
• SV-7 (8/11/20) — non-residential worker
o Acceptable cumulative carcinogenic risk less than 1E-06 (1.3E-09); and,
o Acceptable hazard index is less than 1 (0.00035).
• SV-7 (8/11/20) - resident
o Acceptable cumulative carcinogenic risk less than 1 E-06 (1.7E-08); and,
o Acceptable hazard index is less than 1 (0.0045).
• SV-8 (8/11/20) — non-residential worker
o No contaminants were detected above laboratory detection limits.
• SV-8 (8/11/20) - resident
o No contaminants were detected above laboratory detection limits.
• SV-9 (8/11/20) — non-residential worker
o Acceptable cumulative carcinogenic risk less than 1E-06 (7.9E-09); and,
o Acceptable hazard index is less than 1 (0.0026).
• SV-9 (8/11/20) - resident
o Acceptable cumulative carcinogenic risk less than 1 E-06 (1.4E-07); and,
o Acceptable hazard index is less than 1 (0.032).
As indicated on Attachment 14, soil gas contaminant concentrations in SV-5 and SV-6RR continue
to indicate a potential for vapor intrusion to affect indoor air quality above calculated risk levels for

AECOM
Mr. Mike Cunningham
American Dry Cleaners DC680002
September 24, 2020
Page 4 of 4
both residential and non-residential exposure. Soil gas sampling results for SV-7, SV-8, and SV-9
indicate acceptable risk levels for both residential and non-residential exposure. Soil gas data is
summarized in Analytical Data Table 4. Soil gas laboratory data is included as Attachment 15.
DSCA soil gas risk calculators for residential and non-residential use are provided as Attachment
16.
The results of the June 2020 limited groundwater sampling event indicate the contaminant plume is
generally stable beneath the Olin T. Binkley Church property. Calculated vapor intrusion exposure
risks associated with groundwater quality data collected from monitoring wells MW-3, 2W-10, 2W-
11, and 2W-12 exceed acceptable risk levels for both residential and non-residential use. The
groundwater contaminant plume extends to monitoring well MW-1 located near the southern
property boundary of the church downgradient from the American Dry Cleaners location.
Soil gas quality data for samples SV-5 and SV-6RR exceed calculated acceptable vapor intrusion risk
levels for residential use. Soil gas quality data for sample SV-5 exceeds calculated acceptable vapor
intrusion risk levels for non-residential use. Soil gas quality data from the newly installed soil gas
sampling points SV-7, SV-8, and SV-9 indicate acceptable vapor intrusion risk levels for both
residential and non-residential use.
During the time of this scope of work, indoor air and duct samples were not able to be collected due
to access restrictions to the church building in association with Covid-19. Future indoor air and duct
samples will be collected once normal operations resume with the preschool at the Olin T. Binkley
Church.
The work was done in accordance with AECOM Contract N16004, dated January 3, 2017, and in
accordance with the scope and estimates provided in the approved SLAW029. If you have any
questions or require additional information, please do not hesitate to call either Rob MacWilliams at
704-499-4839 or Nick Shore at 919-461-1485.
Sincerely,
AECOM TECHNICAL SERVICES OF NORTH CAROLINA, INC.
Nick Shore, PG
Project Manager
Enclosures
Robert H. MacWilliams, PG
Program Manager

ANALYTICAL DATA TABLES

Analytical Data Tables
for
North Carolina Dry -Cleaning Solvent Cleanup Act Program
Facility Name:
American Dry Cleaners
201 South Estes Drive, Chapel Hill, Orange County
DSCA ID No.:
DC680002
Submittal Date:
September 2020
Prepared By:
AECOM Technical Services of North Carolina, Inc.
1600 Perimeter Park Drive, Suite 400, Morrisville, North Carolina

Table of Contents
DSCA ID No.:
DC680002
Table/
Att. No.
Description
Check box
if included
Tables
Table 1
Site Chronology
❑
Table 2
Analytical Data for Soil
❑
Table 3
Analytical Data for Sub -slab Gas
❑
Table 4
Analytical Data for Soil Gas
❑
Table 5
Analytical Data for Indoor and Outdoor Air
❑
Table 6
Monitoring Well Construction Data
El
Table 7
Groundwater Elevation Data
El
Table 8
Analytical Data for Groundwater
El
Table 9
Analytical Data for Surface Water
❑
Table 10
Water Well(s) Survey Data
❑
Table 11
Analytical Data for Water Supply Well(s)
❑
Table 12
Analytical Data for Natural Attenuation Parameters
❑
Attachments
Att. 1
Site map showing location(s) of soil boring(s).
❑
Att2
Soil contaminant concentration maps showing the concentration at each sampling
point.
❑
Att. 3
Soil isoconcentration maps.
❑
Att. 4
Site map showing location(s) of monitoring well(s).
❑
Att. 5
Well completion diagrams and records of construction submitted to state.
❑
Att. 6
Groundwater gradient map for each sampling event.
0
Att. 7
PCE concentration map showing the concentration at each sampling point and
isoconcentration map. However, if there are significant plumes for other dry-
cleaning contaminants, contaminant concentration maps for each chemical of
concern should be included.
0
Att. 8
Groundwater concentration trend plots.
❑
Att. 9
Map showing location(s) of surface water sample(s) (if applicable).
❑
Att. 10
Surface water concentration map showing the concentration at each sampling
point (if applicable).
El
Att. 11
USGS Quad map with plotted water well location(s) within the 1,500 foot and 0.5
mile radii of the site (if applicable).
❑
Att. 12
Site map showing location(s) of monitoring well(s) for natural attenuation parametc
❑
Att. 13
Site map showing location(s) of indoor air, outdoor air, or soil gas samples.
❑
Att. 14
Air and soil gas concentration map showing the concentration at each sampling point. El
Att.15
Signed laboratory analytical reports including chain -of custody and quality
assurance/quality control (QA/QC) documentation (only if not previously
submitted).
0
Att. 16
DSCA Program Risk Calculators
p
Att. 17
Mann -Kendall Trend Analysis
El
Att. 18
IDW Disposal Manifest
El
Att. 19
SOP - Groundwater Sampling Using Disposable Bailers
El
Att. 20
SOP - Soil Gas Sampling
El
Att. 21
❑
Note:
1. All maps must include a bar scale, north arrow, site name, DSCA ID No., and date.

Table 1: Site Chronology
DSCA ID No.: DC680002
Chronology of Events
Date
Instructions: Brief description of all significant events that have occurred since a problem was
suspected at the facility. Commence with the first date a problem was suspected and continue
through the most recent activity described in the current report.
04/01/95
Chlorinated compounds detected by Withers & Ravenel (W&R) during removal and closure of Underground Storage
Tanks.
05/01/95
W&R complete preliminary investigation, install one monitoring well at the site.
08/08/95
W&R conduct Phase II Investigation, install eight monitoring wells as the site.
02/01/96
W&R complete Phase III Investigation, excavating a total of 400 cubic yards of contaminated soil.
12/06/07
ECS Carolinas, LLP conduct groundwater assessment.
07/10/08
W&R sampled existing wells and prepared Prioritization Assessment Report.
10/22/08
W&R installed five off -site monitoring wells on neighboring Olin T. Binkley Church property. Report on this date
documents these activities.
02/17/09
W&R authorized to conduct aggressive fluid vapor recovery event. Report on this date documents these activities and
result of post AFVR groundwater monitoring. Site placed in quarterly monitoring by DSCA program.
04/17/09
Second AFVR event authorized and post event groundwater monitoring documented in report issued on this date.
08/04/09
Groundwater monitoring report submitted to DSCA.
11/11/09
Third AFVR event authorized and post event groundwater monitoring documented in report issued on this date.
02/19/09
Groundwater monitoring report submitted to DSCA.
04/15/10
Fourth AFVR event authorized and post event groundwater monitoring documented in report issued on this date.
05/27/10
Outdoor air, indoor air and sub slab vapor sampling on church property documented in report issued on this date.
08/17/10
First semi-annual indoor air monitoring event at church documented in report issued on this date.
09/14/10
Groundwater monitoring report submitted to DSCA.
12/01/10
Fifth AFVR event authorized and post event groundwater monitoring documented in report issued on this date.
02/21/11
Groundwater monitoring report submitted to DSCA.
02/23/11
Second semi-annual indoor air monitoring event at church documented in report issued on this date.
03/08/11
Soil vapor sampling report for Harris Teeter property to the west.
06/09/11
W&R completes underground injection control permit application to inject Adventus product EHC, and receives UIC
permit to conduct pilot test.
06/13/11
Groundwater monitoring report submitted to DSCA.
06/30/11
Indoor air sampling at Harris Teeter documented in report issued on this date.
O1/07/12
Draft injection pilot test (three month post injection) issued on this date.
11/07/12
One-year post injection pilot test report issued on this date.
04/15/13
W&R conducts hydrogeological study to find permeable saturated zone for injection on church property. Bedrock was
encountered above the surficial water table at most geoprobe drilling locations, which would preclude use of geoprobe to
do injection. Report issued on this date documents the study and findings.
09/24/13
End of W&R involvement in project due to expiration of contract.
11/12/13
Groundwater Sampling Event, conducted by AECOM.
12/6/13 - 12/13/13
Indoor/Outdoor Air Sampling Event, Conducted by AECOM.
Page 1 of 2

Table 1: Site Chronology
DSCA ID No.: DC680002
Chronology of Events
Instructions: Brief description of all significant events that have occurred since a problem was
Date
suspected at the facility. Commence with the first date a problem was suspected and continue
through the most recent activity described in the current report.
02/07/14
Groundwater Sampling Event, conducted by AECOM.
06/27/14
Installation of 4 groundwater monitoring wells 2W-9, 2W-10, 2W-11, and 2W-12
07/08/14
Groundwater Sampling Event, conducted by AECOM.
08/22/14
Soil gas sampling event, conducted by AECOM
03/19/15
Indoor Air Sampling Event, conducted by AECOM
06/17/15
Indoor Air Sampling Event, conducted by AECOM
1 1/23/15
Groundwater samples collected from wells MW-2, MW-3, 2W-4, 2W-5, 2W-9, 2W-10, 2W-11, and 2W-12.
O1/11/16
Indoor Air Sampling Event, conducted by AECOM
06/06/16
Indoor Air Sampling Event, conducted by AECOM
Indoor Air (IA-2 and IA-3), Soil Vapor (SV-5 and SV-6), and Groundwater Sampling (MW-2, 2W-9, 2W-10, and 2W-
12/12/16
11) Event, conducted by URS. Two new soil vapor points (SV-5 and SV-6) were installed in the playground area of the
Olin T. Binkley Memorial Church.
6/20/17 -
Indoor Air (IA-2 and IA-3) and Soil Vapor (SV-5 and SV-6) sampling event was conducted by AECOM.
6/28/17
12/12/17 -
Indoor Air (IA-2 and IA-3) and Soil Vapor (SV-5 and SV-6) sampling event was conducted by AECOM.
12/18/17
06/08/18 -
Indoor Air (IA-2 and IA-3) and Soil Vapor (SV-5) sampling event was conducted by AECOM. Soil vapor sampling
06/15/18
point SV-6 had moisture in tubing and was not able to be sampled.
12/19/18
A soil vapor (SV-5) and limited groundwater sampling event of four wells (MW-2, 2W-9, 2W-10, and 2W-11) was
conducted by AECOM. Soil vapor sampling point SV-6 had moisture in tubing and was not able to be sampled.
12/14/18 -
Indoor Air (IA-2 and IA-3) and Soil Vapor (SV-5) sampling event was conducted by AECOM.
12/21/18
01/11/19 -
Confirmatory 7-day indoor air samples (IA-2 and IA-3) were collected via Radiello samplers, and samples (IA-2[8-hr]
O1/18/19
and IA-3[8-hr]) were collected via 6-liter summa canisters on January 11, 2019.
'02/08/19 -
Confirmatory 7-day indoor air samples (IA-2 and IA-3) were collected via Radiello samplersby AECOM.
02/15/19
02/14/19
Damaged monitoring well 2W-8 was abandoned by an NC Licensed Drilling contractor.
06/07/19 -
Indoor Air (IA-2 and IA-3) and Soil Vapor (SV-5 and SV-6r) sampling event was conducted by AECOM.
06/14/19
AECOM collected indoor air samples (IA-2, IA-3, and IA-7 through IA-13), subslab soil gas samples (SSV-1 through
12/14/19
SSV-3), soil gas sample (SV-5), and duct samples (Duct-1 and Duct-2) from within the preschool wing of the Olin T.
Binkley Memorial Church.
06/10/20
AECOM completed a limited groundwater sampling event. Monitoring wells sampled included: MW-1, MW-3, MW-5,
2W-10, 2W-11, and 2W-12.
08/11/20
AECOM installed soil gas sampling points SV-6rr, SV-7, SV-8, and SV-9 at the Olin T Binkley Memorial Church. Soil
gas samples SV-5, SV-6rr, SV-7, SV-8, and SV-9 were collected.
Page 2 of 2

Table 4: Analytical Data for Soil Gas
DSCA ID No.: DC680002
N
0
'
y
U
N
N
A
N
O
O
N
A
i
O
iL
p
iL
iL
Q�
U
W
O N
Q
In/m3]
SV-1
4
0.5h
03/01/11
NA
31.3
NA
NA
NA
361
NA
<1.3
147
13.8
NA
NA
SV-2
4
0.5h
03/01/11
NA
<1.5
NA
NA
NA
<2.5
NA
<1.5
<2.0
<0.94
NA
NA
SV-3
4
0.5h
03/01/11
NA
<1.4
NA
NA
NA
16.9
NA
<1.4
1.8
<0.87
NA
NA
SV-4
3
0.5h
03/01/11
NA
1.6
NA
NA
NA
<1.4
NA
10.1
5.5
<0.87
NA
NA
7
0.5h
12/12/16
NA
16,000
NA
NA
NA
150,000
NA
410
35,000
1 <5.1
NA
NA
7
0.5 h
06/28/17
NA
9,740
NA
NA
NA
75,800
NA
347
24,900
<10.2
NA
NA
7
0.5 h
12/12/17
NA
11,000
NA
NA
NA
86,000
NA
260
23,000
<5.1
NA
NA
S V-5
7
0.5 h
06/15/18
NA
18,000
NA
NA
NA
140,000
NA
480
40,000
<51
NA
NA
7
0.5 h
12/19/18
NA
9,800
NA
NA
NA
120,000
NA
390
24,000
<38
NA
NA
7
0.5 h
06/14/19
NA
6,000
NA
NA
NA
93,000
NA
320
18,000
<38
NA
NA
7
0.5 h
12/14/19
NA
5,600
NA
NA
NA
51,000
NA
230
9,600
<5.1
NA
NA
7
0.5 h
08/11/20
NA
1,400
NA
NA
NA
45,000
NA
140
7,000
<38
NA
NA
7
0.5h
12/12/16
NA
880
NA
NA
NA
31,000
NA
1 190
4,800
<5.1
NA
NA
SV-6
7
0.5 h
06/28/17
NA
262
NA
NA
NA
3,850
NA
154
484
<1.02
NA
NA
7
0.5 h
12/12/17
NA
830
NA
NA
NA
21,000
NA
98
3,300
<5.1
NA
NA
SV-6r
7
0.5 h
06/14/19
NA
81
NA
NA
NA
13,000
NA
66
1,300
<5.1
NA
NA
SV6-rr
3.6
0.5 h
08/11/20
NA
15
NA
NA
NA
9,800
NA
15
350
<3.8
NA
NA
SV-7
5
0.5 h
08/11/20
NA
<2
NA
NA
NA
6.2
NA
<2
<2.7
<1.3
NA
NA
SV-8
3.5
0.5 h
08/11/20
NA
<2
NA
NA
NA
<3.4
NA
<2
<2.7
<1.3
NA
NA
SV-9
4.75
0.5 h
08/11/20
NA
<2
NA
NA
NA
8.8
NA
<2
1.8J
<1.3
NA
NA
SGOI
3.33
0.5h
07/09/14
NA
19
NA
NA
NA
330
NA
<1.2
110
<0.77
NA
<1.2
SG02
3.33
0.5h
07/09/14
NA
180
NA
NA
NA
130,000
NA
<140
920
<90
NA
<140
SG03
3.33
0.5h
07/09/14
NA
<22
NA
NA
NA
11,000
NA
<22
70
<14
NA
<22
Indicate "G" for grab sample or for
longer samples indicate the number of hours followed
by "h".
Page 1 of I

Table 6: Monitoring Well Construction Data
DSCA ID No.: DC680002
06-
Well ID
Date Installed
(mm/dd/YY)
Number of Samples
Well Depth
[feet]
Well Diameter
[inch]
Screen Interval
[feet]
Status
(Active/Inactive)
HA-1
08/07/95
1
5.0
N/A
0.0-5.0
Inactive
HA-2
08/07/95
1
7.0
N/A
2.0-7.0
Inactive
2W-1
05/23/95
1
8.5
2
3.1-8.1
Inactive
2W-2S
08/07/95
7
8.0
2
2.8-7.8
Active
2W-2D
08/08/95
3
14.0
2
3.4-13.4
Active
2W-3
08/08/95
1
21.5
2
6.0-21.0
Inactive
2W-4
08/07/95
6
9.5
2
4.0-9.0
Active
2W-5
08/10/95
16
9.2
2
3.8-8.8
Active
2W-6
08/08/95
16
13.0
2
7.2-12.2
Active
2W-7
08/08/95
7
9.0
2
3.5-8.5
Active
2W-8
08/10/95
2
9.0
2
3.5-8.5
Inactive
2W-9
6/27/14
4
13
2
8-13
Active
2W-10
6/27/14
5
13
2
8-13
Active
2W-11
6/27/14
5
13
2
8-13
Active
2W-12
6/27/14
3
12
2
7-12
Active
MW-1
09/23/08
13
14.5
2
4.5-14.5
Active
MW-2
09/23/08
17
28
2
18-28
Active
MW-3
09/24/08
16
28
2
18-28
Active
MW-4
09/24/08
6
33
2
23-33
Active
MW-5
09/24/08
14
28
2
18-28
Active
MW-6
09/12/08
1
15
2
5-15
Active
Page 1 of 1

Table 7: Groundwater Elevation Data
DSCA ID No.: DC680002
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Groundwater
Elevation
feet
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
10/21/10
265.79
5.49
260.30
N/A
N/A
N/A
01/21/11
265.79
5.29
260.50
N/A
N/A
N/A
04/29/11
265.79
3.96
261.83
N/A
N/A
N/A
07/18/11
265.79
5.43
260.36
N/A
N/A
N/A
08/30/11
265.79
5.78
260.01
N/A
N/A
N/A
09/22/11
265.79
5.58
260.21
N/A
N/A
N/A
10/18/11
265.79
5.73
260.06
N/A
N/A
N/A
11/18/11
265.79
5.57
260.22
N/A
N/A
N/A
2W-2S
02/23/12
265.79
5.05
260.74
N/A
N/A
N/A
05/24/12
265.79
5.05
260.74
N/A
N/A
N/A
02/07/14
265.79
5.10
260.69
N/A
N/A
N/A
08/04/14
265.79
4.95
260.84
N/A
N/A
N/A
11/23/15
265.79
5.37
260.42
N/A
N/A
N/A
12/12/16
265.79
5.74
260.05
N/A
N/A
N/A
12/19/18
265.79
4.76
261.03
N/A
N/A
N/A
06/10/20
265.79
4.91
260.88
N/A
N/A
N/A
10/21/10
265.73
5.42
260.31
N/A
N/A
N/A
01/21/11
265.73
5.23
260.50
N/A
N/A
N/A
04/29/11
265.73
3.89
261.84
N/A
N/A
N/A
07/18/11
265.73
NA
NA
N/A
N/A
N/A
2W-2D
02/07/14
265.73
5.13
260.60
N/A
N/A
N/A
08/04/14
265.73
4.91
260.82
N/A
N/A
N/A
11/23/15
265.73
5.40
260.33
N/A
N/A
N/A
12/12/16
265.73
5.78
259.95
N/A
N/A
N/A
12/19/18
265.73
4.80
260.93
N/A
N/A
N/A
06/10/20
265.73
4.96
260.77
N/A
N/A
N/A
10/21/10
265.61
5.22
260.39
N/A
N/A
N/A
01/21/11
265.61
5.16
260.45
N/A
N/A
N/A
04/29/11
265.61
4.36
261.25
N/A
N/A
N/A
07/17/11
265.61
5.00
260.61
N/A
N/A
N/A
08/30/11
265.61
5.50
260.11
N/A
N/A
N/A
09/22/11
265.61
5.14
260.47
N/A
N/A
N/A
10/18/11
265.61
5.30
260.31
N/A
N/A
N/A
2W-4
11/18/11
265.61
5.25
260.36
N/A
N/A
N/A
02/23/12
265.61
5.95
259.66
N/A
N/A
N/A
05/24/12
265.61
4.73
260.88
N/A
N/A
N/A
02/07/14
265.61
5.30
260.31
N/A
N/A
N/A
08/04/14
265.61
5.25
260.36
N/A
N/A
N/A
11/23/15
265.61
5.25
260.36
N/A
N/A
N/A
12/12/16
265.61
5.49
260.12
N/A
N/A
N/A
12/19/18
265.61
4.95
260.66
N/A
N/A
N/A
10/21/10
264.53
4.73
259.80
N/A
N/A
N/A
01/21/11
264.53
4.57
259.96
N/A
N/A
N/A
04/29/11
264.53
4.22
260.31
N/A
N/A
N/A
07/18/11
264.53
4.33
260.20
N/A
N/A
N/A
08/30/11
264.53
4.80
259.73
N/A
N/A
N/A
09/22/11
264.53
4.23
260.30
N/A
N/A
N/A
10/18/11
264.53
4.45
260.08
N/A
N/A
N/A
11/18/11
264.53
4.00
260.53
N/A
N/A
N/A
2W-5
02/23/12
264.53
3.43
261.10
N/A
N/A
N/A
05/24/12
264.53
3.90
260.63
N/A
N/A
N/A
09/04/12
264.53
4.38
260.15
N/A
N/A
N/A
02/07/14
264.53
4.50
260.03
N/A
N/A
N/A
08/04/14
264.53
4.46
260.07
N/A
N/A
N/A
11/23/15
264.53
4.49
260.04
N/A
N/A
N/A
12/12/16
264.53
4.43
260.10
N/A
N/A
N/A
12/19/18
264.53
4.08
260.45
N/A
N/A
N/A
06/10/20
264.53
3.78
260.75
N/A
N/A
N/A
Page 1 of4

Table 7: Groundwater Elevation Data
DSCA ID No.: DC680002
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Elevation Groundwater
feet
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
10/21/10
264.77
6.01
258.76
N/A
N/A
N/A
01/21/11
264.77
5.56
259.21
N/A
N/A
N/A
04/29/11
264.77
5.41
259.36
N/A
N/A
N/A
07/18/11
264.77
5.50
259.27
N/A
N/A
N/A
08/30/11
264.77
6.06
258.71
N/A
N/A
N/A
09/22/11
264.77
5.36
259.41
N/A
N/A
N/A
10/18/11
264.77
5.95
258.82
N/A
N/A
N/A
11/18/11
264.77
5.85
258.92
N/A
N/A
N/A
2W-6
02/23/12
264.77
5.44
259.33
N/A
N/A
N/A
05/24/12
264.77
5.21
259.56
N/A
N/A
N/A
09/04/12
264.77
5.48
259.29
N/A
N/A
N/A
11/19/13
264.77
6.52
258.25
N/A
N/A
N/A
08/04/14
264.77
5.34
259.43
N/A
N/A
N/A
11/23/15
264.77
5.31
259.46
N/A
N/A
N/A
12/12/16
264.77
5.71
259.06
N/A
N/A
N/A
12/19/18
264.77
4.73
260.04
N/A
N/A
N/A
06/10/20
264.77
4.82
259.95
N/A
N/A
N/A
10/21/10
264.54
3.18
261.36
N/A
N/A
N/A
01/21/11
264.54
3.37
261.17
N/A
N/A
N/A
04/29/11
264.54
2.49
262.05
N/A
N/A
N/A
07/18/11
264.54
1.10
263.44
N/A
N/A
N/A
2W-7
11/19/13
264.54
5.15
259.39
N/A
N/A
N/A
08/04/14
264.54
2.93
261.61
N/A
N/A
N/A
11/23/15
264.54
3.75
260.79
N/A
N/A
N/A
12/12/16
264.54
5.24
259.30
N/A
N/A
N/A
06/10/20
264.54
1.88
262.66
N/A
N/A
N/A
10/21/10
266.32
6.05
260.27
N/A
N/A
N/A
01/21/11
266.32
6.27
260.05
N/A
N/A
N/A
04/29/11
266.32
4.83
261.49
N/A
N/A
N/A
07/18/11
266.32
6.15
260.17
N/A
N/A
N/A
08/30/11
266.32
6.50
259.82
N/A
N/A
N/A
09/22/11
266.32
6.33
259.99
N/A
N/A
N/A
2W-8
10/18/11
266.32
6.41
259.91
N/A
N/A
N/A
11/18/11
266.32
6.44
259.88
N/A
N/A
N/A
02/23/12
266.32
6.00
260.32
N/A
N/A
N/A
05/24/12
266.32
5.90
260.42
N/A
N/A
N/A
11/19/13
266.32
6.48
259.84
N/A
N/A
N/A
08/04/14
266.32
6.10
260.22
N/A
N/A
N/A
07/08/14
269.32
9.30
260.02
N/A
N/A
N/A
08/04/14
269.32
9.42
259.90
N/A
N/A
N/A
11/23/15
269.32
9.45
259.87
N/A
N/A
N/A
2W-9
12/12/16
269.32
9.51
259.81
N/A
N/A
N/A
12/19/18
269.32
8.04
261.28
N/A
N/A
N/A
06/10/20
269.32
8.30
261.02
N/A
N/A
N/A
07/08/14
268.73
9.50
259.23
N/A
N/A
N/A
08/04/14
268.73
9.25
259.48
N/A
N/A
N/A
11/23/15
268.73
9.30
259.43
N/A
N/A
N/A
2W-10
12/12/16
268.73
9.33
259.40
N/A
N/A
N/A
12/19/18
268.73
8.17
260.56
N/A
N/A
N/A
06/10/20
268.73
8.29
260.44
N/A
N/A
N/A
07/08/14
268.70
9.80
258.90
N/A
N/A
N/A
08/04/14
268.70
9.71
258.99
N/A
N/A
N/A
11/23/15
268.70
9.75
258.95
N/A
N/A
N/A
2W-11
12/12/16
268.70
9.78
258.92
N/A
N/A
N/A
12/19/18
268.70
9.00
259.70
N/A
N/A
N/A
06/10/20
268.70
9.11
259.59
N/A
N/A
N/A
Page 2 of 4

Table 7: Groundwater Elevation Data
DSCA ID No.: DC680002
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Elevation Groundwater
feet
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
07/08/14
267.52
8.70
258.82
N/A
N/A
N/A
08/04/14
267.52
8.60
258.92
N/A
N/A
N/A
2W-12
11/23/15
267.52
8.56
258.96
N/A
N/A
N/A
12/12/16
267.52
8.65
258.87
N/A
N/A
N/A
12/19/18
267.52
7.37
260.15
N/A
N/A
N/A
06/10/20
267.52
7.51
260.01
N/A
N/A
N/A
10/21/10
266.35
8.58
257.77
N/A
N/A
N/A
01/21/11
266.35
8.38
257.97
N/A
N/A
N/A
04/29/11
266.35
8.13
258.22
N/A
N/A
N/A
07/18/11
266.35
8.24
258.11
N/A
N/A
N/A
08/30/11
266.35
8.65
257.70
N/A
N/A
N/A
09/22/11
266.35
8.63
257.72
N/A
N/A
N/A
10/18/11
266.35
8.62
257.73
N/A
N/A
N/A
MW-1
02/23/12
266.35
8.13
258.22
N/A
N/A
N/A
05/24/12
266.35
8.29
258.06
N/A
N/A
N/A
09/04/12
266.35
8.62
257.73
N/A
N/A
N/A
11/19/13
266.35
8.40
257.95
N/A
N/A
N/A
08/04/14
266.36
7.90
258.46
N/A
N/A
N/A
11/23/15
266.36
7.64
258.72
N/A
N/A
N/A
12/12/16
266.36
7.66
258.70
N/A
N/A
N/A
06/10/20
266.36
7.39
258.97
N/A
N/A
N/A
10/21/10
268.03
8.89
259.14
N/A
N/A
N/A
01/21/11
268.03
8.73
259.30
N/A
N/A
N/A
04/29/11
268.03
8.34
259.69
N/A
N/A
N/A
07/18/11
268.03
8.44
259.59
N/A
N/A
N/A
08/30/11
268.03
8.80
259.23
N/A
N/A
N/A
09/22/11
268.03
8.55
259.48
N/A
N/A
N/A
10/18/11
268.03
8.59
259.44
N/A
N/A
N/A
11/18/11
268.03
8.49
259.54
N/A
N/A
N/A
MW-2
02/23/12
268.03
7.89
260.14
N/A
N/A
N/A
05/24/12
268.03
7.51
260.52
N/A
N/A
N/A
09/04/12
268.03
8.06
259.97
N/A
N/A
N/A
11/19/13
268.03
8.29
259.74
N/A
N/A
N/A
08/04/14
268.04
8.06
259.98
N/A
N/A
N/A
11/23/15
268.04
7.77
260.27
N/A
N/A
N/A
12/12/16
268.04
8.90
259.14
N/A
N/A
N/A
12/19/18
268.04
7.34
260.70
N/A
N/A
N/A
06/10/20
268.04
7.55
260.49
N/A
N/A
N/A
10/21/10
269.40
10.33
259.07
N/A
N/A
N/A
01/21/11
269.40
9.46
259.94
N/A
N/A
N/A
04/29/11
269.40
8.91
260.49
N/A
N/A
N/A
07/18/11
269.40
9.04
260.36
N/A
N/A
N/A
08/30/11
269.40
10.41
258.99
N/A
N/A
N/A
09/22/11
269.40
9.27
260.13
N/A
N/A
N/A
10/18/11
269.40
9.38
260.02
N/A
N/A
N/A
MW-3
11/18/11
269.40
9.65
259.75
N/A
N/A
N/A
02/23/12
269.40
9.00
260.40
N/A
N/A
N/A
09/04/12
269.40
9.78
259.62
N/A
N/A
N/A
11/19/13
269.40
9.52
259.88
N/A
N/A
N/A
08/04/14
269.41
9.26
260.15
N/A
N/A
N/A
11/23/15
269.41
9.27
260.14
N/A
N/A
N/A
12/12/16
269.41
9.65
259.76
N/A
N/A
N/A
12/19/18
269.41
8.40
261.01
N/A
N/A
N/A
06/10/20
269.41
8.89
260.52
N/A
N/A
N/A
Page 3 of 4

Table 7: Groundwater Elevation Data
DSCA ID No.: DC680002
Groundwater
Sampling Point
Sampling Date
(mm/dd/yy)
TOC Elevation
[feet]
Depth to Water
[feet bgs]
Elevation Groundwater
feet
Depth to NAPL
[feet bgs]
NAPL Thickness
[feet]
Corrected*
Groundwater
Elevation [feet]
10/21/10
264.30
10.87
253.43
N/A
N/A
N/A
01/21/11
264.30
9.94
254.36
N/A
N/A
N/A
04/29/11
264.30
7.84
256.46
N/A
N/A
N/A
07/18/11
264.30
9.19
255.11
N/A
N/A
N/A
08/30/11
264.30
10.93
253.37
N/A
N/A
N/A
09/22/11
264.30
10.65
253.65
N/A
N/A
N/A
MW-4
10/18/11
264.30
10.34
253.96
N/A
N/A
N/A
11/18/11
264.30
10.18
254.12
N/A
N/A
N/A
02/23/12
264.30
8.22
256.08
N/A
N/A
N/A
05/24/12
264.30
7.09
257.21
N/A
N/A
N/A
09/24/12
264.30
9.85
254.45
N/A
N/A
N/A
11/19/13
264.30
10.30
254.00
N/A
N/A
N/A
08/04/14
264.31
8.02
256.29
N/A
N/A
N/A
10/21/10
264.49
8.45
256.04
N/A
N/A
N/A
01/21/11
264.49
6.99
257.50
N/A
N/A
N/A
04/29/11
264.49
5.50
258.99
N/A
N/A
N/A
07/18/11
264.49
6.00
258.49
N/A
N/A
N/A
08/30/11
264.49
6.88
257.61
N/A
N/A
N/A
09/22/11
264.49
7.04
257.45
N/A
N/A
N/A
10/18/11
264.49
7.17
257.32
N/A
N/A
N/A
MW-5
11/18/11
264.49
7.34
257.15
N/A
N/A
N/A
02/23/12
264.49
5.84
258.65
N/A
N/A
N/A
05/24/12
264.49
5.72
258.77
N/A
N/A
N/A
09/04/12
264.49
6.51
257.98
N/A
N/A
N/A
11/19/13
264.49
6.78
257.71
N/A
N/A
N/A
08/04/14
264.50
6.03
258.47
N/A
N/A
N/A
12/12/16
264.50
6.02
258.48
N/A
N/A
N/A
06/10/20
264.50
7.50
257.00
N/A
N/A
N/A
10/21/10
N/A
4.31
N/A
N/A
N/A
N/A
01/21/11
N/A
4.23
N/A
N/A
N/A
N/A
04/29/11
N/A
5.80
N/A
N/A
N/A
N/A
07/18/11
N/A
2.79
N/A
N/A
N/A
N/A
MW-6
11/19/13
N/A
6.78
N/A
N/A
N/A
N/A
08/04/14
264.50
3.05
261.45
N/A
N/A
N/A
11/23/15
264.50
4.46
260.04
N/A
N/A
N/A
12/12/16
264.50
5.85
258.65
N/A
N/A
N/A
06/10/20
264.50
2.48
262.02
N/A
N/A
N/A
Page 4 of 4

Table 8: Analytical Data for Groundwater
DSCA ID No.: DC680002
�
�
s
o
0
G".
O
Q
U
O
O
i3
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,SJ
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.0
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O
O
`�
F'
V
T
N
N
b
ov.
O
4
M
U
U
U
1m9/Ll
P-
1 1
<0.001
1
<0.001
<0.001
<0.001
1
<0.001
0.01
0.46
0.0016<0.001
<0.001
<0.01
<0.001
<0.001
<0.001
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
GP-4
02/14/13
<0.001
U.J
<0.001
<0.001
<0.001
0.16
<0.001
<0.001
<0.001
0.0012
<0.001
0.0011
<0.001
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
P-5
1 1
7.551
<0.001
<0.001
7001
7
70.551
0.01
1
<0.001
70.001
70.51
70.001
70.001
70.001
<0.01
<0.01
ND
0.01
<0.01
<0.001
NS
<0.001
7001
7001
70.331
7o.001
70.001
70.501
<0.01
<0.001
<0.001
<0.001
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
P-
1 1
70.001
1.
70.551
70.001
70.551
70.001
1
7
1
<0.001
<0.001
<0.01
<0.001
<0.001
<0.001
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
<0.001
<0.001
<0.001
<0.001
<0.001
70.001
<0.001
<0.001
<0.01
<0.001
<0.001
<0.001
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
5
NA
<
NA
NA
NA
.11
NA
NA
< 1
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
<
NA
NANNA
NA
NA
< 0
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
p2W-1
05 5
NA
5.300
NA
NA
7 .5
NA
NA
2.72NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
08/95
NA
<0.0050
NA
NA<0.0050
NA
NA
<0.0050
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
12/06/07
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
NA
<0.001
<0.001
<0.001
NA
NA
NA
<0.001
NA
NA
NA
10/21/10
<0.001
<0.001
<0.001
<0.0010.00066J
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.01
<0.001
<0.001
0.0031J
<0.01
<0.01
ND
<0.001
0.00043J
<0.001
NS
2W-2S
01/21/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.01
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
04/29/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.01
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
0.00037J
<0.001
NS
07/18/11
<0.001
I <0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.01
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
NS
02/07/14
<0.0005
<0.0005
<0.0005
<0.0005
NA
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.01
<0.01
<0.01
ND
<0.0005
<0.0005
NA
NA
08/95
NA
<0.0010
NA
NA
NA
<0.0010
NA
NA
<0.0010
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2W-2D
12/06/07
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
NA
<0.001
<0.001
<0.001
NA
NA
NA
<0.001
NA
NA
NA
02/07/14
<0.0005
<0.0005
<0.0005
<0.0005
NA
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.01
<0.01
<0.01
ND
<0.0005
<0.0005
NA
NA
2W-3
08/95
NA
<0.001
NA
NA
NA
0.179
NA
NA
0.003
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
08/95
NA
<0.100
NA
NA
NA
6.09
NA
NA
0.647
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
12/06/07
<0.001
I <0.001
<0.001
<0.001
0.023
0.0301
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
NA
<0.001
<0.001
1.76
NA
NA
NA
<0.001
NA
NA
NA
01/30/09
<0.001
0.479
<0.001
<0.001
<0.001
1.293
<0.001
0.00691
0.379
<0.001
<0.001
<0.001
NA
<0.001
<0.001
NA
NA
NA
NA
<0.001
<0.001
NA
NA
2W 4
02/07/14
<0.1
7.1
<0.1
<0.1
NA
2.9
<0.1
0.083J
1.8
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<2
<2
<2
ND
<0.1
<0.1
NA
NA
11/23/15
<0.001
0.132
<0.001
<0.001
70.005
0.00484
<0.005
0.00194
0.0078
0.0376
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
<0.005
<0.001
<0.0025
<0.001
NA
05/14/18
<0.001
0.0092
<0.001
<0.001
<0.002
0.0038
<0.001
0.00024J
0.0045
0.0033
<0.003
<0.001
NA
<0.001
<0.001
<0.05
<0.02
<0.01
<0.002
<0.002
<0.002
<0.001
<0.001
Page 1 of 5

Table 8: Analytical Data for Groundwater
DSCA ID No.: DC680002
�
�
s
o
w
F'
7
N
o
CG
8
W
F
F
F
DC
d
N
4
U
U
U
1m9/Ll
12/06/07
<0.001
<0.001
<0.001
<0.001
1.52
15.1
<0.001
<0.001
2.55
<0.001
<0.001
<0.001
NA
<0.001
<0.001
<0.001
NA
NA
NA
<0.001
NA
NA
NA
01/30/09
<0.001
0.81
<0.001
<0.001
<0.001
0.991
<0.001
0.00683
0.429
0.329
<0.001
<0.001
NA
<0.001
<0.001
NA
NA
NA
NA
<0.001
0.0041
NA
NA
10/21/10
<0.02
0.239
<0.02
<0.02
<0.02
1.95
<0.02
0.0038
0.399
0.002
<0.02
<0.02
<0.02
<0.02
0.0012J
<0.05
<0.01
<0.01
ND
<0.02
0.00028J
<0.001
NS
01/21/11
<0.02
1.42
<0.02
<0.02
<0.02
4.15
<0.02
0.116
1.77
0.0274
<0.02
<0.02
<0.02
<0.02
0.0059J
<0.05
<0.01
<0.01
ND
<0.02
<0.01
<0.001
NS
04/29/11
<0.02
1.9
<0.02
<0.02
<0.02
3.35
<0.02
0.0155J
1.63
0.256
<0.02
<0.02
<0.02
<0.02
<0.001
<0.05
<0.01
<0.01
ND
<0.02
<0.01
0.0215J
NS
07/18/11
<0.050
0.760
<0.050
<0.050
<0.050
3.4
<0.250
<0.05
0.990
0.060
<0.150
<0.050
<0.050
<0.050
<0.050
<2.0
<0.5
<0.5
ND
<0.050
<0.12
<0.05
<0.001
08/30/11
0.0011
1.500
<0.001
<0.001
<0.001
0.082
<0.005
0.014
0.280
0.390
<0.003
<0.001
<0.001
0.005
<0.001
0.15
0.076
<0.01
I ND
<0.001
<0.0025
<0.001
<0.001
09/22/11
<0.01
5.900
<0.01
<0.01
<0.01
0.65
<0.05
0.026
0.320
0.092
<0.03
<0.01
<0.01
0.012
<0.01
3.9
2
<0.1
ND
<0.01
<0.025
<0.01
<0.01
2W 5
10/18/11
<0.01
0.034
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
0.540
<0.03
<0.01
<0.01
<0.01
<0.01
0.6
0.42
<0.1
ND
<0.01
<0.025
<0.01
<0.01
11/18/11
<0.005
0.081
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
0.150
<0.015
<0.005
<0.005
<0.005
<0.005
0.45
0.25
<0.1
ND
<0.005
<0.025
<0.01
<0.01
02/23/12
<0.01
0.013
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
0.006
<0.03
<0.01
<0.01
<0.01
<0.01
<0.05
<0.01
<0.1
ND
<0.01
<0.025
<0.01
<0.01
05/24/12
<0.001
0.003
<0.001
<0.001
<0.001
<0.001
0.044
0.0016
<0.001
0.0041
<0.003
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
09/04/12
<0.001
0.002
<0.001
<0.001
<0.001
<0.001
1.5
0.0023
<0.001
0.0012
<0.003
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.01
ND
<0.001
0.0086
<0.001
<0.001
02/07/14
0.00034J
0.018
<0.0005
<0.0005
NA
<0.0005
0.0036
0.012
0.00044J
0.035
<0.0005
<0.0005
<0.0005
<0.0005
<0.0005
<0.01
<0.01
<0.01
ND
<0.0005
<0.0005
NA
NA
11/23/15
<0.001
0.174
<0.001
<0.001
<0.005
<0.001
<0.005
0.00496
0.00108
0.0931
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
0.0247
<0.001
<0.0025
<0.001
NA
05/14/18
<0.005
0.47
<0.005
<0.005
<0.01
<0.005
0.0034J
0.01
<0.005
0.29
<0.015
<0.005
NA
<0.005
<0.005
<0.25
0.013J
<0.05
0.0093J
<0.01
<0.01
<0.005
<0.005
08/95
NA
<0.100
NA
NA
NA
1.77
NA
NA
0.09600
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
12/06/07
<0.001
<0.001
<0.001
<0.001
0.482
3.92
<0.001
<0.001
0.83800
<0.001
<0.001
<0.001
NA
<0.001
<0.001
<0.001
NA
NA
NA
<0.001
NA
NA
NA
01/30/09
<0.001
0.656
<0.001
<0.001
<0.001
0.903
<0.001
<0.001
0.21000
<0.001
<0.001
<0.001
NA
<0.001
<0.001
NA
NA
NA
NA
<0.001
<0.001
NA
NA
10/21/10
<0.002
0.401
<0.002
<0.002
<0.002
0.427
<0.002
<0.001
0.214
0.0373
<0.002
<0.002
<0.002
<0.002
<0.002
<0.05
<0.01
<0.01
ND
<0.002
<0.001
<0.001
NS
01/21/11
<0.002
0.317
<0.002
<0.002
<0.002
0.346
<0.002
0.0015J
0.33
0.0035
<0.002
<0.002
<0.002
<0.002
<0.002
<0.05
<0.01
<0.01
ND
<0.002
<0.01
<0.001
NS
04/29/11
<0.002
0.357
<0.002
<0.002
<0.002
3.41
<0.002
<0.001
0.316
<0.001
<0.002
<0.002
<0.002
<0.002
<0.002
<0.05
<0.01
<0.01
ND
<0.002
<0.01
<0.001
NS
07/18/11
<0.05
0.280
<0.05
<0.05
<0.05
3.00
<0.250
<0.05
0.350
<0.05
<0.150
<0.05
<0.05
<0.05
<0.05
<2.5
<0.250
<0.025
ND
<0.05
<0.120
<0.05
<0.001
2W_6
08/30/11
<0.001
0.240
<0.001
<0.001
<0.001
2.90
<0.005
0.0029
0.320
0.0016
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
09/22/11
<0.02
0.170
<0.02
<0.02
<0.02
1.70
<0.1
<0.02
0.190
<0.02
<0.06
<0.02
<0.02
<0.02
<0.02
<1.0
<0.2
<0.2
ND
<0.02
<0.05
<0.02
<0.02
10/18/11
<0.025
0.25
<0.025
<0.025
<0.025
2.50
<0.120
<0.025
0.250
<0.02
<0.06
<0.025
<0.025
<0.025
<0.025
<1.0
<0.2
<0.2
ND
<0.025
<0.05
<0.02
<0.02
11/18/11
<0.020
0.240
<0.020
<0.020
<0.020
1.80
<0.100
<0.020
0.220
<0.020
<0.06
<0.020
<0.020
<0.020
<0.020
<0.100
<0.200
<0.200
ND
<0.020
<0.05
<0.02
<0.02
02/23/12
<0.020
0.160
<0.020
<0.020
<0.020
2.60
<0.100
<0.020
0.240
<0.020
<0.06
0.16
<0.020
<0.020
<0.020
<0.100
<0.200
<0.200
ND
<0.020
<0.05
<0.02
<0.02
05/24/12
<0.01
0.170
<0.01
<0.01
<0.01
3.0
<0.01
<0.01
0..250
<0.01
<0.03
<0.01
<0.01
<0.01
<0.01
<0.5
<0.051
<<<000...251
<<<000.0..202555
<<N00..A002 1
<<N00/..A0021
09/04/12
<0.025
0.76
<0.025
<0.025
<0.025
0.84
<0.120
<0.025
0280<0.02
<0.06
<005
<0.025
<0.025
<0.025
<1.0
<0.2
NND
DD
<<<000.0..202515
<0.25
1.8
<0.25
<0.25
NA
2.10
<0.25
<0.25
.890
511/12/13
002
<0.25
<0.25
<0.25
<0.25
<0.25
<1
<0.
05/14/18
<0.005
0.4
<0.005
<0.005
<0.01
0.16
<0.005
0.0026J
0.140
.
<0.015
<0.005
NA
<0.005
<0.005
<0.25
<0.1
<0.05
<0.01
<0.01
<0.01
<0.005
<0.005
Page 2 of 5

Table 8: Analytical Data for Groundwater
DSCA ID No.: DC680002
�
�
s
o
w
F'
4
N
z
4
U
U
U
1m9/Ll
08/95
NA
<0.001
NA
NA
NA
<0.001
NA
NA
<0.001
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
12/06/07
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
NA
<0.001
<0.001
<0.001
NA
NA
NA
<0.001
NA
NA
NA
10/21/10
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.0024J
<0.01
<0.01
ND
<0.001
0.00027J
<0.001
NS
2W-7
01/21/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
04/29/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
07/18/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
10
ND
<0.001
<0.0025
<0.001
NS
11/12/13
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
<0.005
<0.005
<0.002
<0.005
<0.005
<0.005
<0.005
<0.005
<0.02
<0.01
<0.01
ND
<0.005
<0.005
NA
N/A
2W 8
12/06/07
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
NA
<0.001
<0.001
<0.001
NA
NA
NA
<0.001
NA
NA
NA
11/12/13
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
<0.005
0.00032J
<0.002
<0.005
<0.005
<0.005
<0.005
<0.005
<0.02
<0.01
<0.01
ND
<0.005
<0.005
NA
N/A
07/08/14
<0.0025
0.6
<0.0025
<0.0025
NA
0.47
<0.0025
0.0052
0.24
0.0007J
<0.0025
<0.0025
NA
<0.0025
<0.0025
<0.050
<0.050
<0.050
ND
0.017J
<0.0025
NA
<0.0025
2W 9
11/23/15
<0.001
0.27
<0.001
<0.001
<0.005
0.316
<0.005
0.00404
0.129
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
<0.005
0.0251
<0.0025
<0.001
NA
12/12/16
<0.002
0.21
<0.002
<0.004
<0.008
0.22
<0.004
0.0037J
0.11
<0.008
<0.012
<0.002
NA
<0.002
<0.002
<0.2
<0.08
<0.04
<0.008
0.013
<0.008
<0.002
NA
12/19/18
<0.001
0.149
<0.001
<0.001
<0.005
0.176
<0.001
0.00229
0.0862
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
<0.005
<0.005
<0.0025
<0.001
NA
07/08/14
<0.050
2.7
<0.050
<0.050
NA
7.2
<0.050
0.031J
3.5
<0.050
<0.050
<0.050
NA
<0.050
<0.050
<1
71
<1
ND
<0.050
<0.050
NA
<0.050
11/23/15
<0.005
2.46
<0.005
<0.005
<0.025
3.1
<0.025
0.0247
4.27
<0.005
<0.015
<0.005
<0.005
<0.005
<0.005
<0.25
<0.05
<0.05
<0.025
<0.005
<0.0125
<0.005
NA
2W-10
12/12/16
<0.1
6.2
<0.1
<0.1
<0.2
0.053
<0.1
0.044J
0.049J
<0.2
<0.3
<0.1
NA
<0.1
<0.1
<5
<2
<1
<0.2
<0.2
<0.2
<0.1
NA
12/19/18
<0.005
1.93
<0.005
<0.005
<0.025
0.0482
<0.005
0.0126
0.036
0.0901
<0.015
<0.005
<0.005
<0.005
<0.005
<0.25
<0.05
<0.05
<0.025
<0.025
<0.0125
<0.005
NA
06/10/20
<0.0005
0.101
<0.0005
<0.0005
<0.0025
0.018
<0.0005
0.000473J
0.0365
0.0022
<0.0015
<0.0005
<0.0005
<0.0005
<0.0005
<0.025
<0.005
<0.005
<0.0025
<0.0005
<0.00125
<0.0005
NA
07/08/14
<0.025
0.87
<0.025
<0.025
NA
2.9
<0.025
0.0092J
0.69
<0.025
<0.025
<0.0025
NA
<0.025
<0.025
<0.5
<0.5
<0.5
ND
<0.025
<0.025
NA
<0.025
11/23/15
<0.005
0.885
<0.005
<0.005
<0.025
0.312
<0.025
0.0115
2.26
<0.005
<0.015
<0.005
<0.005
<0.005
<0.005
<0.25
<0.05
<0.05
<0.025
<0.005
<0.0125
<0.005
NA
2W-11
12/12/16
<0.002
1.9
<0.002
<0.004
<0.008
0.074
<0.004
0.012J
0.21
0.000881
<0.012
<0.002
1 NA
<0.002
0.0026J
<0.2
<0.08
<0.04
<0.008
<0.008
0.0027J
<0.004
NA
12/19/18
<0.001
0.314
<0.001
<0.001
<0.005
0.0178
<0.001
0.0008
0.0121
0.0982
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
<0.005
<0.005
<0.0025
<0.001
NA
06/10/20
<0.0005
0.0679
<0.0005
<0.0005
<0.0025
0.0114
<0.0005
0.000292J
0.0242
0.00143
<0.0015
<0.0005
<0.0005
<0.0005
<0.0005
<0.025
<0.005
<0.005
1 <0.0025
<0.0005
1 <0.00125
<0.0005
NA
07/08/14
<0.005
0.43
<0.005
<0.005
NA
1.1
<0.005
0.0028J
0.27
0.0043J
<0.005
<0.0050
NA
<0.005
<0.005
<0.1
<0.1
<0.1
ND
<0.005
<0.005
NA
<0.005
2W-12
11/23/15
<0.001
0.564
<0.001
<0.001
<0.005
1.17
<0.005
0.00749
0.249
<0.001
<0.003
<0.001
0.00107
<0.001
<0.001
<0.05
<0.01
<0.01
<0.005
<0.001
<0.0025
<0.001
NA
06/10/20
<0.0005
0.799
<0.0005
<0.0005
<0.0025
1.34
<0.0005
0.00531
0.228
<0.0005
<0.0015
<0.0005
0.0018
<0.0005
0.00103
<0.025
<0.005
<0.005
<0.0025
0.000147J
<0.00125
<0.0005
NA
09/23/08
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
NA
NA
NA
NA
<0.005
NA
NA
NA
10/21/10
<0.001
<0.001
<0.001
<0.001
<0.001
0.00084J
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.0023J
<0.01
<0.01
ND
<0.001
0.00044J
<0.001
NS
01/21/11
<0.001
<0.001
<0.001
<0.001
<0.001
0.00048J
<0.001
<0.001
<0.00t
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.0025J
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
04/29/11
<0.001
<0.001
<0.001
<0.001
<0.001
0.00061J
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
07/18/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.00t
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
08/30/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
MW-1
09/22/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.00t
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
10/18/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
02/23/12
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.00t
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
05/24/12
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
09/04/12
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
11/12/13
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
<0.005
0.00036J
1 <0.002
<0.005
<0.005
<0.005
<0.005
<0.005
<0.02
<0.01
<0.01
ND
<0.005
<0.005
NA
N/A
06/10/20
<0.0005
10.000141JI
<0.0005
1 <0.0005
<0.0025
0.000738
1<0.0005
<0.0005
10.000442JI
<0.0005
1 10.0015
<0.0005
1 <0.0005
<0.0005
1 <0.0005
1 <0.025
1 <0.005
<0.005
<0.0025
1 <0.0005
1 <0.00125
<0.0005
1 NA
Page 3 of 5

Table 8: Analytical Data for Groundwater
DSCA ID No.: DC680002
a
�
�
o
4
N
F
F
F
>DC=
d
N
4
U
U
U
09/23/08
<0.005
0.799
<0.005
<0.005
<0.005
40.7
<0.005
0.0619
1.208
0.0191
<0.005
<0.005
NA
0.0693
<0.005
NA
NA
NA
NA
<0.005
NA
NA
NA
01/30/09
<0.001
0.8
<0.001
<0.001
<0.001
31.57
<0.001
0.046
1.886
0.00377
<0.001
<0.001
NA
<0.001
0.0249
NA
NA
NA
NA
<0.001
<0.001
NA
NA
10/21/10
<0.05
0.322
<0.05
<0.05
<0.05
4.63
<0.001
<0.001
0.451
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.01
<0.01
ND
<0.001
<0.001
<0.001
NS
01/21/11
<0.05
1.29
<0.05
<0.05
<0.05
40.4
<0.001
0.0878
3.1
<0.05
<0.05
<0.05
<0.05
<0.05
0.0505
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
04/29/11
<0.05
1.46
<0.05
<0.05
<0.05
48.4
<0.001
<0.001
2.76
<0.05
<0.05
<0.05
<0.05
<0.05
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
0.198J
NS
07/18/11
<1.0
<1.0
<1.0
<1.0
<1.0
34.0
<1.0
<1.0
2.6
<1.0
<3.0
<1.0
<1.0
<1.0
<1.0
<50
<10
<10
ND
<1.0
<2.5
<1.0
<1.0
08/30/11
<0.250
1.2
<0.250
<0.250
<0.250
40.0
<0.250
<0.250
3.6
<0.250
<0.750
<0.250
<0.250
<0.250
<0.250
<12
<2.5
<2.5
ND
<0.250
<0.620
<0.250
<0.250
09/22/11
<0.250
7.2
<0.250
<0.250
<0.250
30.0
<0.250
<0.250
2.4
<0.250
<0.750
<0.250
<0.250
<0.250
<0.250
<12
<2.5
<2.5
ND
<0.250
<0.620
<0.250
<0.250
MW-2
10/18/11
<0.250
15
<0.250
<0.250
<0.250
<0.250
<0.250
<0.250
<0.250
<0.250
<0.750
<0.250
<0.250
<0.250
<0.250
<12
<2.5
<2.5
ND
<0.250
<0.620
<0.250
<0.250
11/18/11
<0.100
1.3
<0.100
<0.100
<0.100
40.0
<0.100
<0.100
3.2
<0.100
<0.300
<0.100
<0.100
<0.100
<0.100
<1.0
<1.0
<1.0
ND
<0.100
<0.250
<0.100
<0.100
02/23/12
<0.100
1.2
<0.100
<0.100
<0.100
37.0
<0.100
<0.100
3.0
<0.100
<0.300
<0.100
<0.100
<0.100
<0.100
<1.0
<1.0
<1.0
ND
<0.100
<0.250
<0.100
<0.100
05/24/12
<0.100
1.1
<0.100
<0.100
<0.100
37.0
<0.100
<0.100
2.6
<0.100
<0.300
<0.100
<0.100
<0.100
<0.100
<1.0
<1.0
<1.0
ND
<0.100
<0.250
<0.100
<0.100
09/04/12
<0.250
1.1
<0.250
<0.250
<0.250
35.0
<0.250
<0.250
2.5
<0.250
<0.750
<0.250
<0.250
<0.250
<0.250
<12
<2.5
<2.5
ND
<0.250
<0.620
<0.250
<0.250
11/12/13
<2.5
0.99 J
<2.5
<2.5
NA
43.0
<2.5
<2.5
2.9
<1
<2.5
<2.5
<2.5
<2.5
<2.5
<10
<5
<5
ND
<2.5
<2.5
NA
NA
11/23/15
<0.005
0.6
<0.005
<0.005
<0.025
13.9
<0.025
0.0415
1.36
<0.005
<0.015
<0.005
<0.005
<0.005
0.0246
<0.25
<0.05
<0.05
<0.025
<0.025
<0.025
<0.005
NA
12/12/16
<0.01
0.5
<0.01
<0.01
<0.02
0.62
<0.01
0.00396J
0.21
0.0023J
<0.03
<0.01
NA
<0.01
<0.01
<0.5
<0.2
<0.1
<0.02
<0.02
<0.02
<0.01
NA
12/19/18
<0.001
0.736
<0.001
<0.001
<0.005
14.2
<0.001
0.0478
1.69
0.103
<0.003
<0.001
0.00211
<0.001
0.0228
<0.05
<0.01
<0.01
<0.005
<0.005
<0.0025
<0.001
NA
09/24/08
<0.005
1.8
<0.005
<0.005
<0.005
5.134
<0.005
<0.005
0.73
<0.005
<0.005
<0.005
NA
<0.005
<0.005
NA
NA
NA
NA
<0.005
NA
NA
NA
01/30/09
<0.001
0.893
<0.001
<0.001
<0.001
3.073
<0.001
0.013
0.629
<0.001
<0.001
<0.001
NA
<0.001
<0.001
NA
NA
NA
NA
<0.001
<0.001
NA
NA
10/21/10
<0.005
0.68
<0.005
<0.005
<0.001
1.89
<0.005
0.0092J
0.392
<0.005
<0.001
<0.005
<0.005
<0.005
<0.005
<0.05
<0.01
<0.01
ND
<0.005
<0.001
<0.001
NS
01/21/11
<0.005
1.3
<0.005
<0.005
<0.001
1.86
<0.005
0.0172
0.408
<0.005
<0.001
<0.005
<0.005
<0.005
<0.005
<0.25
<0.01
<0.01
ND
<0.005
<0.01
<0.001
NS
04/29/11
<0.005
1.23
<0.005
<0.005
<0.001
1.42
<0.005
0.0148
0.319
<0.005
<0.001
<0.005
<0.005
<0.005
<0.005
<0.25
<0.01
<0.01
ND
<0.005
<0.01
<0.001
NS
07/18/11
<0.025
1.4
<0.025
<0.025
<0.025
1.3
<0.025
<0.025
0.42
<0.025
<0.075
<0.025
<0.025
<0.025
<0.025
<1.2
<0.25
<0.25
I ND
<0.025
<0.062
<0.25
<0.25
08/30/11
<0.01
1.7
<0.01
<0.01
<0.01
1.8
<0.01
0.021
0.51
<0.001
<0.003
<0.01
<0.001
<0.01
<0.001
<0.500
<0.1
<0.1
ND
<0.01
<0.025
<0.001
0.012
NM-3
09/22/11
<0.01
2.0
<0.01
<0.01
<0.01
1.7
<0.01
0.021
0.53
<0.001
<0.003
<0.01
<0.001
<0.01
<0.01
<0.500
<0.1
<0.1
ND
<0.01
<0.025
<0.001
0.014
10/18/11
<0.01
2.1
<0.01
<0.01
<0.01
2.5
<0.01
0.028
0.67
<0.001
<0.003
<0.01
0.017
<0.01
<0.01
<0.500
<0.1
<0.1
ND
<0.01
<0.025
<0.001
<0.001
11/18/11
<0.002
2.7
<0.002
<0.002
<0.002
4.4
<0.002
0.031
0.96
<0.002
<0.006
<0.002
0.027
<0.002
0.0027
<0.100
<0.20
<0.20
ND
<0.002
<0.005
<0.002
<0.002
02/23/12
<0.025
2.8
<0.025
<0.025LNA
4.1
<0.025
0.032
1.1
<0.025
<0.075
<0.025
<0.025
<0.025
<0.025
<1.2
<0.025
<0.025
ND
<0.025
<0.005
<0.025
<0.025
05/24/12
<0.050
2.9
<0.050
<0.050
3.3
<0.050
<0.050
1.6
<0.050
<0.150
<0.050
<0.050
<0.050
<0.050
<2.5
<0.050
<0.050
ND
<0.050
<0.1
<0.050
<0.050
09/04/12
<0.025
4.3
<0.025
<0.025
6.6
<0.025
0.05
1.9
<0.025
<0.075
<0.025
0.031
<0.025
<0.025
<1.2
<0.025
<0.025
ND
<0.025
<0.005
<0.025
<0.025
11/12/13
<0.5
1.5
<0.5
<0.5
5.9
<0.5
<0.5
0.73
<0.2
<0.5
<0.5
0.031J
<0.5
<0.5
<2
<1
<1
ND
<0.5
<0.5
NA
NA
11/23/15
<0.001
0.8
<0.001
<0.001
1.58
<0.005
0.00934
0.335
<0.001
<0.003
<0.001
0.00742
<0.001
0.00106
<0.05
<0.01
<0.010
<0.005
<0.001
<0.0025
<0.001
NA
06/10/20
<0.0005
0.144
<0.0005
<0.0005
0.365
<0.0005
0.00153
0.0792
0.00358
<0.0015
<0.0005
0.00155
<0.0005
0.000241J
<0.025
<0.005
1 <0.005
1 <0.0025
<0.0005
<0.00125
<0.0005
NA
Page 4 of 5

Table 8: Analytical Data for Groundwater
DSCA ID No.: DC680002
�
�
s
o
w
F'
7
N
o
CG
8
W
F
F
F
DC
d
N
4
U
U
U
1m9/Ll
09/24/08
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
NA
NA
NA
NA
<0.005
NA
NA
NA
10/21/10
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.0022J
<0.01
<0.01
ND
<0.001
0.00022J
<0.001
NS
01/21/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
NM-4
04/29/11
<0.001
0.00031J
<0.001
<0.001
<0.001
0.00071J
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
07/18/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
11/12/13
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
<0.005
<0.005
<0.002
<0.005
<0.005
<0.005
<0.005
<0.005
<0.02
<0.01
<0.01
ND
<0.005
<0.005
NA
<0.005
09/24/08
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
NA
NA
NA
NA
<0.005
NA
NA
NA
10/21/10
<0.001
<0.001
<0.001
<0.001
<0.001
0.00048J
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
0.0034J
<0.01
<0.01
ND
<0.001
<0.001
<0.001
<0.001
01/21/11
<0.001
<0.001
<0.001
<0.001
<0.001
0.00089J
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
04/29/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.25
<0.01
<0.01
ND
<0.001
<0.01
<0.001
NS
07/18/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
08/30/11
<0.001
<0.001
<0.001
<0.001
<0.001
0.0023
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
09/22/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
NM-5
10/18/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
11/18/11
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
02/23/12
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
05/24/12
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
09/04/12
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.005
<0.001
<0.001
<0.001
<0.003
<0.001
<0.001
<0.001
<0.001
<0.05
<0.01
<0.01
ND
<0.001
<0.0025
<0.001
<0.001
11/19/13
<0.005
<0.005
<0.005
<0.005
NA
<0.005
<0.005
<0.005
<0.005
<0.002
<0.005
<0.005
<0.005
<0.005
<0.005
<0.02
<0.01
<0.01
ND
<0.005
<0.005
NA
N/A
06/10/20
<0.0005
0.000228J
<0.0005
<0.0005
<0.0025
<0.0005
<0.0005
<0.0005
1 <0.0005
<0.0005
1 <0.0015
<0.0005
<0.0005
<0.0005
<0.0005
<0.025
<0.005
<0.005
<0.0025
<0.0005
<0.00125
<0.0005
NA
MW-6
11/12/13
0.00031J
<0.005
<0.005
70.005
NA
<0.005
0.0027J
<0.005
1 <0.005
<0.002
1 <0.005
<0.005
<0.005
<0.005
75.005
<0.02
<0.01
<0.01
ND
<0.005
<0.005
NA
N/A
Page 5 of 5

ATTACHMENT 6
GROUNDWATER CONTOUR MAP

r I
. it }_'I
jA
PC *.
I F
E �
• :+ram r.
M W-4
# (260.77) NM
411 D NM
2W-8
. 2W-2S & /
' (260.88) /
f Harris Teeter Center ti I MW-3 f '
ti. (])160.52
2W4 @ ) '
2W-
' • ' /
2W-5 T-
' -
' f
FormL-rAmerican ; � � 2W- 0 / +�
Dry -Cleaners Location ` ' 5 .4
46 4% -� MW-2
i ' •
•,.�+ &0.49(D 2W- 1 Olin T.Bin ley
Baptist 9hurch
257.0
ti 2W-766 t 260.01 / t
262.
P %/.ti-` /2W4 51 /
/ 259.95
MW-1"
258.97
art-
6
.02
- -
• t�
r
10
i
e
I U
LEGEND
.
z
Monitoring Well Location, Identification and
o
F
M 09 Groundwater Elevation (ft/msl)
U y o
Deep Monitoring Well Location, Identification
C COO
No U
DMW-1 and Groundwater Elevation (ft/msl) - values in
O N Q U Q
o
(29.87) parentheses not used in contouring
a)
Abandoned Monitoring Well Location
a) ... a�
Q
Not Measured
U
NM
4-
i
— — Potentiometric Surface Contour (ft/msl)
o °'Wvs
(�
-• -
Inferred Groundwater Flow Direction
4, o
N
� M
w
V C
7
N Q�
�M
8, m �"
2 2 ry ry
C,
�d
- SW
l
IL
0
o 0
rV o
� N
N 00
0 0 Ln
_ V) �
� z o
LL
L° °z
m a F
U
u? O
100
SHEET-
APPROX. SCALE, ft. ATT. 6

ATTACHMENT 7
GROUNDWATER QUALITY MAP

Ar
W
2W-4 (05/14/2018)
PCE - 3.8 µg/1
TCE - 4.5 µg/l
cis-1,2-DCE - 9.2 µg/l
trans-1,2-DCE - 0.24 J µg/l
Vinyl chloride - 3.3 µg/l
2W-5 (05/14/2018) • •
cis-1,2-DCE - 470 µg/l
trans-1,2-DCE - 10 µg/l
Vinyl chloride - 290 µg/l
# Chloroethane - 9.3 J µg/l
Toluene - 3.4 J µg/l
2-Butanone - 13 J µg/l
2W-2D (02/07/2014)
BDL
2W-2S (02/07/2014)
Harris Teeter Center
Fornfer American
- _ - -Cleaners Location ` I ; '
V.
MW-2 (12/19/2018) • • \ 1
#� PCE - 14,200 µg/l
TCE - 1,690 µg/1
cis-1,2-DCE - 736 µg/1
trans-1,2-DCE - 47.8 µg/1 ; .41-
Vinyl chloride - 103 µg/1
1,1-DCE - 22.8 µg/l q�, dh . qL
1,1,2-Trichlorotrifluoroethane -
/ / f
4
2W-7 (11/12/2013)
BDL
MW-3 (11/12/2013) • '
Benzene - 0.31 J µg/l
Toluene - 2.7 J µg/1.
N.4
2W-6 (05/14/2018) • •
'CE - 160 µgd
TCE - 140 µg/1
cis-1,2-DCE - 400 µg/l
trans-1,2-DCE - 2.6 J µg/l
Vinyl chloride - 11 µg/l
y
U
2W-8 (11/12/2013) LEGEND
• • Z
TCE - 0.32 J µg/l p
Monitoring Well Location .—
81
No
-' MW-3 (06/10/2020) Deep Monitoring Well Location �00
PCE - 365 µg/1 U
TCE - 79.2 µg/l Abandoned Monitoring Well Location Q U Q
cis-1,2-DCE - 144 µg/1 BDL Below Laboratory Detection Limits
trans-1,2-DCE - 1.53 µg/l
Vinyl chloride - 3.58 µg/l J Estimated Concentration Q v)
1,1-Dichloroethene - 0.241 J µg/1 µg/l micrograms per liter U
1,1,2-Trichlorotrifluoroethane - 1.55 µg/l 0 W vs
— — Potentiometric Surface Contour (ft) Q
vi
Inferred Groundwater Flow Direction r � O z � MW-4 (11/12/2013) _N
BDL � �
J Area of PCE 2L Standard Exceedance
Red highlighted text indicates concentrations
2W-9 (12/19/2018) above 2L Standards.
PCE - 176 _ PCE - Tetrachloroethene a
CE - 8612 µg/l TCE - Trichloroethene
cis-1,2-DCE - 149 µg/1 DCE - Dichloroethene = ry
trans-1,2-DCE - 2.29 µg/1 • • Groundwater analytical results exceed calculated 2
vapor intrusion risk for residential and non-residen- ❑ � � .. .
tial exposure (DSCA Calculator Version 7 - August ¢ i ° U t ?
_ 2019).
• • Groundwater analytical results do not exceed
f
/ calculated vapor intrusion risk for non-residential
exposure but do exceed for residential exposure
2W-10 (06/10/2020) • •
� (DSCA Calculator Version 7 -August 2019).
PCE - 18 µg/1
TCE - 36.5 µg/l • • Groundwater analytical results do not exceed
cis-1,2-DCE - 101 µg/l calculated vapor intrusion risk for residential and
trans-1,2-DCE - 0.473 J µg/1 non-residential exposure (DSCA Calculator
� Vinyl chloride - 2.2 µg/1
Version 7 - August 2019).
Olin T. B ikley -
BaptistAurch
MW-5 (06/10/2020) • •
cis-1,2-DCE - 0.228 J µg/1�
/ lied,
2W-11 (06/10/2029) • •
PCE - 11.4 µg/1
TCE - 24.2 µg/l -
cis-1,2-DCE - 67.9 µg/1
trans-1,2-DCE - 0.292 J µg/l S O o
Vinyl chloride - 1.43 µg/l 0 0
r4 N
O \
2W-12 (06/10/2020) • o o M
PCE - 1,340 µg/1 MW-1 (06/10/2020) • • _ V, Ln
TCE - 228 µg/1 PCE - 0.738 µg/l
cis-1,2-DCE - 799 µg/1 TCE - 0.442 J µg/l z
trans-1,2-DCE - 5.31 µg/l cis-1 2-DCE - 0.141 J µg/1 -
Chloroform - 0.147 J µg/1
100
1,1-Dichloroethene - 1.03 µg/l 0
SHEET:
1,1,2-Trichlorotrifluoroethane - 1.80 µg/1 ROX. SCALE, ft. ATT. 7

ATTACHMENT 14
SOIL VAPOR LOCATIONS AND RESULTS

LEGEND
Soil Gas Sample
0 Former Site Location SV-6 (6/28/171 00
PCE - 3,850 ug/m3
__j
PCE -Tetrachloroethene TCE - 484 ug/m3
TCE -Trichloroethene cis-1,2-DCE - 262 ug/m3
cis-1,2-DCE - cis- 1,2-Dichloroethene trans 1,2 DCE 154 ug/m3
trans-1,2-DCE-trans-1,2-Dichloroethene SV-6(12/12/17) ••
ug/m3 micrograms per cubic meter PCE - 21,000 ug/m3
J Estimated Concentration TCE - 3,300 ug/m3
09 Sample analytical results do not exceed cis-1,2-DCE - 830 ug/m3
calculated vapor intrusion risk for residential or trans-1,2-DCE - 98 Ug/m3
non-residential exposure - DSCA Indoor Air SV-6 (6/15/18)
Risk Calculator, Version 7, August 2019. Not Sampled
SV-6 (12/19/18)
99 Sample analytical results do not exceed Not Sampled
calculated vapor intrusion risk for non- SV 6R (6/14/19) 100
residential exposure but do exceed for PCE-13,000 ug/m3
residential exposure - DSCA Indoor Air Risk TCE -1,300 ug/m3
Calculator, Version 7, August 2019. cis-1,2-DCE - 81 ug/m3
trans-1,2-DCE - 66 Ug/m3
00 Sample analytical results exceed calculated SV 6RR (8/11/20) • • +
vapor intrusion risk for residential and non- PCE - 9,800 ug/m3
residential exposure - DSCA Indoor Air Risk TCE - 350 ug/m3 ,
Calculator, Version 7, August 2019. cis-1,2-DCE - 15 ug/m3 11 (8//20)/20)
trans-1,2-DCE - 15 ug/m3 SV-7 PCE - (8/ u
HARRIS TEETER � .
CENTER
t
AMERICAN DR
CLEANERS
SV-5 (6/28/17) 00
PCE - 75,800 Ug/m3 r
TICE - 24,900 Ug/m3 4
cis-1,2-DCE - 9,740 Ug/m3 �•
trans 1,2 DCE 347 ug/m3 SV-8 (8/11/20) O O
SV-5 (12/12/17) 00 BDL Q
PCE - 86,000 Ug/m3 w
TICE - 23,000 Ug/m3 OLIN T BINKLEY
CIS-1,2-DCE-11,000 ug/m3 !� BAPTIST CHURCH
trans-1,2-DCE - 260 Ug/m3 SV-9 (8/11/I a
SV-5 (6/15/18) • •
PCE-140,000 Ug/m3 ,. PCE - 8.8 ug/m3 2
TICE - 40,000 ug/m3 TICE 1.8 J ug/m3 p
cis-1,2-DCE-18,000 ug/m3 ' 4 — 0
trans-1,2-DCE - 480 Ug/m3
SV-5 (12/19/18) • •
PCE 120,000 ug/m3'� 0
TICE - 24,000 Ug/m3 t Z
cis 1,2 DCE 9,800 Ug/m3
trans-1,2-DCE - 390 ug/m3 I ;
SV-5 (6/14/19) 115 C�1
PCE - 93,000 Ug/m3 C
TICE -18,000 Ug/m3 f
cis-1,2-DCE - 6,000 Ug/m3 • !; -
trans-1,2-DCE - 320 Ug/m3 r
SV-5 (12/14/19) • • ;�� t
PCE - 51,000 u /m3
TICE - 9,600 ug m3 j
cis-1,2-DCE - 5,600 ug/m3 r p ) R t
trans-1,2-DCE - 230 Ug/m3 �'; a<
SV-5 (8/11/20) 00
PCE - 45,000 Ug/m3 i !
TICE - 7,000 Ug/m3 1 0 100
cis-1,2-DCE - 1,400 Ug/m3
trans-1,2-DCE -140 Ug/m3
Feet
AECOM TECHNICAL SERVICES
OF NORTH CAROLINA, INC
411%� OM 5925 CARNEGIE BOULEVARD, SUITE 370
CHARLOTTE, NC 28209
TEL: [phone]
FAX:(704) 553{751
y„q
Soil Vapor Locations and Results
American Dry Cleaners
201 South Estes Drive
Chapel Hill, NC
DSCA Site # DC680002
c
m
s=
p
Q
U
v
v
9
Z CO
N
0-10
SHEET:
Attachment-14

ATTACHMENT 15
LABORATORY ANALYTICAL DATA REPORTS

aceAnalytical o
National Center for Testing & Innovation
• #r
ANALYTICAL REPORT
June 22, 2020
AECOM - Raleigh, NC
Sample Delivery Group
Samples Received:
Project Number:
Description:
Site:
L1228253
06/11/2020
60628609
American Dry Cleaners (DC680002)
DC680002
Report To: Nick Shore
1600 Perimeter Park Drive
Suite 400
Morrisville. NC 27560
Entire Report Reviewed By: (211�o
J
Chris McCord
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be
reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace
Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and
ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided,
and as the samples are received.
4
V —
16
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 1 of 25

TABLE OF CONTENTS ONE LAB. NATIONWIDE.
Cp: Cover Page
1
Fn
Tc: Table of Contents
2
Ss: Sample Summary
3
Cn: Case Narrative
4
Sr: Sample Results
5
FS
MW-1 L1228253-01
5
[Cn]
MW-3 L1228253-02
7
MW-5 L1228253-03
9
Fr
2W-10 L1228253-04
11
2W-11 L1228253-05
13
RC
2W-12 L1228253-06
15
F,
Qc: Quality Control Summary
17
Volatile Organic Compounds (GC/MS) by Method 8260D
17
rAl
GI: Glossary of Terms
22
Al: Accreditations & Locations
23
FSC
Sc: Sample Chain of Custody
24
ACCOUNT: PROJECT: SDG:
DATE/TIME:
PAGE:
AECOM - Raleigh, NC 60628609 L1228253
06/22/20 11:07
2 of 25

SAMPLE
SUMMARY
ONE LAB. NATIONWIDE.
Collected by
Collected date/time
Received date/time
MW-1 L1228253-01 GW
T.Eischen
06/10/2010:30
06/11/2009:00
FP1
Method
Batch
Dilution
Preparation
Analysis
Analyst Location
date/time
date/time
FTC
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1492364
1
06/15/20 01:50
06/15/20 01:50
JHH Mt. Juliet, TN
Collected by
Collected date/time
Received date/time
M
MW-3 L1228253-02 GW
T.Eischen
06/10/2013:20
06/11/2009:00
Method
Batch
Dilution
Preparation
Analysis
Analyst Location
[Cn]
date/time
date/time
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1492364
1
06/15/20 02:09
06/15/20 02:09
JHH Mt. Juliet, TN
FSr
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1495099
10
06/18/2016:55
06/18/2016:55
BMB Mt. Juliet, TN
6
QC
Collected by
Collected date/time
Received date/time
MW-5 L1228253-03 GW
T.Eischen
06/10/2012:45
06/11/2009:00
GI
Method
Batch
Dilution
Preparation
Analysis
Analyst Location
date/time
date/time
FAI
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1492364
1
06/15/20 02:29
06/15/20 02:29
JHH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1495099
1
06/18/2017:14
06/18/2017:14
BMB Mt. Juliet, TN
FSC
Collected by
Collected date/time
Received date/time
2W-10 L1228253-04 GW
T.Eischen
06/10/2013:50
06/11/2009:00
Method
Batch
Dilution
Preparation
Analysis
Analyst Location
date/time
date/time
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1492364
1
06/15/20 02:48
06/15/20 02:48
JHH Mt. Juliet, TN
Collected by
Collected date/time
Received date/time
2W-11 L1228253-05 GW
T.Eischen
06/10/2014:20
06/11/2009:00
Method
Batch
Dilution
Preparation
Analysis
Analyst Location
date/time
date/time
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1492364
1
06/15/20 03:07
06/15/20 03:07
JHH Mt. Juliet, TN
Collected by
Collected date/time
Received date/time
2W-12 L1228253-06 GW
T.Eischen
06/10/2012:00
06/11/2009:00
Method
Batch
Dilution
Preparation
Analysis
Analyst Location
date/time
date/time
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1492364
1
06/15/20 03:26
06/15/20 03:26
JHH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260D
WG1495099
25
06/18/2017:34
06/18/2017:34
BMB Mt. Juliet, TN
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 3 of 25

CASE NARRATIVE
ONE LAB. NATIONWIDE.
All sample aliquots were received at the correct temperature, in the proper containers, with the FP1
appropriate preservatives, and within method specified holding times, unless qualified or notated within
the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples FTChave been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control
are within established criteria except where addressed in this case narrative, a non-conformance form
or properly qualified within the sample results. By my digital signature below, I affirm to the best of my FSS
knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the
quality of the data have been identified by the laboratory, and no information or data have been
knowingly withheld that would affect the quality of the data.
FSr
FC-1
GI
J ❑
Chris McCord FAI
Project Manager
FSC
Report Revision History
Level II Report - Version 1: 06/19/20 09:17
Sample Delivery Group (SDG) Narrative
2-Chloroethyl vinyl ether degrades under acidic conditions. Associated results were determined from the analysis of an
acid -preserved sample.
Lab Sample ID
Project Sample ID
Method
L1228253-01
M W-1
8260D
L1228253-02
MW-3
8260D
L1228253-03
MW-5
8260D
L1228253-04
2W-10
8260D
L1228253-05
2W-11
8260D
L1228253-06
2W-12
8260D
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 4 of 25

M W-1 SAMPLE RESULTS - 01 ONE LAB. NATIONWIDE.
Collected date/time: 06/10/20 10:30 L1228253
Volatile Organic Compounds (GC/MS) by Method 8260D
Result
Qualifier MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
Acetone
U
11.3
25.0
1 06/15/2020 01:50
WG1492364
Acrylonitrile
U
0.671
5.00
1 06/15/2020 01:50
WG1492364
Benzene
U
0.0941
0.500
1 06/15/2020 01:50
WG1492364
Bromobenzene
U
0.118
0.500
1 06/15/2020 01:50
WG1492364
Bromodichloromethane
U
0.136
0.500
1 06/15/2020 01:50
WG1492364
Bromochloromethane
U
0.128
0.500
1 06/15/2020 01:50
WG1492364
Bromoform
U
0.129
0.500
1 06/15/2020 01:50
WG1492364
Bromomethane
U
0.605
2.50
1 06/15/2020 01:50
WG1492364
n-Butylbenzene
U
0.157
0.500
1 06/15/2020 01:50
WG1492364
sec -Butyl benzene
U
0.125
0.500
1 06/15/2020 01:50
WG1492364
ter[-Butylbenzene
U
0.127
0.500
1 06/15/2020 01:50
WG1492364
Carbon disulfide
U
0.0962
0.500
1 06/15/2020 01:50
WG1492364
Carbon tetrachloride
U
0.128
0.500
1 06/15/2020 01:50
WG1492364
Chlorobenzene
U
0.117
0.500
1 06/15/2020 01:50
WG1492364
Chlorodibromomethane
U
0.140
0.500
1 06/15/2020 01:50
WG1492364
Chloroethane
U
0.192
2.50
1 06/15/2020 01:50
WG1492364
2-Chloroethyl vinyl ether
U
0.575
50.0
1 06/15/2020 01:50
WG1492364
Chloroform
U
0.111
0.500
1 06/15/2020 01:50
WG1492364
Chloromethane
U
0.960
1.25
1 06/15/2020 01:50
WG1492364
2-Chlorotoluene
U
0.106
0.500
1 06/15/2020 01:50
WG1492364
4-Chlorotoluene
U
0.114
0.500
1 06/15/2020 01:50
WG1492364
1,2-Dibromo-3-Chloropropane
U
0.276
2.50
1 06/15/2020 01:50
WG1492364
1,2-Dibromoethane
U
0.126
0.500
1 06/15/2020 01:50
WG1492364
Dibromomethane
U
0.122
0.500
1 06/15/2020 01:50
WG1492364
1,2-Dichlorobenzene
U
0.107
0.500
1 06/15/2020 01:50
WG1492364
1,3-Dichlorobenzene
U
0.299
0.500
1 06/15/2020 01:50
WG1492364
1,4-Dichlorobenzene
U
0.120
0.500
1 06/15/2020 01:50
WG1492364
Dichlorodifluoromethane
U
0.374
2.50
1 06/15/2020 01:50
WG1492364
1,1-Dichloroethane
U
0.100
0.500
1 06/15/2020 01:50
WG1492364
1,2-Dichloroethane
U
0.0819
0.500
1 06/15/2020 01:50
WG1492364
M-Dichloroethene
U
0.188
0.500
1 06/15/2020 01:50
WG1492364
cis-1,2-Dichloroethene
0.141
J 0.126
0.500
1 06/15/2020 01:50
WG1492364
trans-1,2-Dichloroethene
U
0.149
0.500
1 06/15/2020 01:50
WG1492364
1,2-Dichloropropane
U
0.149
0.500
1 06/15/2020 01:50
WG1492364
1,1-Dichloropropene
U
0.142
0.500
1 06/15/2020 01:50
WG1492364
1,3-Dichloropropane
U
0.109
1.00
1 06/15/2020 01:50
WG1492364
cis-1,3-Dichloropropene
U
0.111
0.500
1 06/15/2020 01:50
WG1492364
trans-1,3-Dichloropropene
U
0.118
0.500
1 06/15/2020 01:50
WG1492364
trans-1,4-Dichloro-2-butene
U
0.467
5.00
1 06/15/2020 01:50
WG1492364
2,2-Dichloropropane
U
0.161
0.500
1 06/15/2020 01:50
WG1492364
Di -isopropyl ether
U
0.105
0.500
1 06/15/2020 01:50
WG1492364
Ethylbenzene
U
0.137
0.500
1 06/15/2020 01:50
WG1492364
Hexachloro-1,3-butadiene
U
J0 0.337
1.00
1 06/15/2020 01:50
WG1492364
2-Hexanone
U
0.787
5.00
1 06/15/2020 01:50
WG1492364
n-Hexane
U
0.749
5.00
1 06/15/2020 01:50
WG1492364
lodomethane
U
0.554
5.00
1 06/15/2020 01:50
WG1492364
Isopropylbenzene
U
0.105
0.500
1 06/15/2020 01:50
WG1492364
p-Isopropyltoluene
U
0.120
0.500
1 06/15/2020 01:50
WG1492364
2-Butanone (MEK)
U
1.19
5.00
1 06/15/2020 01:50
WG1492364
Methylene Chloride
U
0.430
2.50
1 06/15/2020 01:50
WG1492364
4-Methyl-2-pentanone (MIBK)
U
0.478
5.00
1 06/15/2020 01:50
WG1492364
Methyl tert-butyl ether
U
0.101
0.500
1 06/15/2020 01:50
WG1492364
Naphthalene
U
0.174
2.50
1 06/15/2020 01:50
WG1492364
n-Propylbenzene
U
0.0993
0.500
1 06/15/2020 01:50
WG1492364
Styrene
U
0.118
0.500
1 06/15/2020 01:50
WG1492364
1,1,1,2-Tetrachloroethane
U
0.147
0.500
1 06/15/2020 01:50
WG1492364
FP1
FTc
FSS
4
Cn
Fc
F ql
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 5 of 25

M W-1
SAMPLE
RESULTS - 01
ONE LAB. NATIONWIDE.
Collected date/time: 06/10/20 10:30
L1228253
Volatile Organic Compounds (GC/MS)
by Method 8260D
Result Qualifier
MDL
RDL
Dilution Analysis
Batch
F
Analyte
ug/I
ug/I
ug/I
date / time
1,1,2,2-Tetrachloroethane
U
0.133
0.500
1 06/15/2020 01:50
WG1492364
FTc
1,1,2-Trichlorotrifluoroethane
U
0.180
0.500
1 06/15/2020 01:50
WG1492364
Tetrachloroethene
0.738
0.300
0.500
1 06/15/2020 01:50
WG1492364
Toluene
U
0.278
0.500
1 06/15/2020 01:50
WG1492364
FS
1,2,3-Trichlorobenzene
U
0.164
0.500
1 06/15/2020 01:50
WG1492364
1,2,4-Trichlorobenzene
U J0
0.481
1.00
1 06/15/2020 01:50
WG1492364
Fn
1,1,1-Trichloroethane
U
0.149
0.500
1 06/15/2020 01:50
WG1492364
1,1,2-Trichloroethane
U
0.158
0.500
1 06/15/2020 01:50
WG1492364
Trichloroethene
0.442 J
0.190
0.500
1 06/15/2020 01:50
WG1492364
Trichlorofluoromethane
U
0.160
2.50
1 06/15/2020 01:50
WG1492364
1,2,3-Trichloropropane
U
0.237
2.50
1 06/15/2020 01:50
WG1492364
6
QC
1,2,4-Trimethylbenzene
U
0.322
0.500
1 06/15/2020 01:50
WG1492364
1,2,3-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 01:50
WG1492364
1,3,5-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 01:50
WG1492364
GI
Vinyl acetate
U
0.692
5.00
1 06/15/2020 01:50
WG1492364
Vinyl chloride
U
0.234
0.500
1 06/15/2020 01:50
WG1492364
FAI
Xylenes, Total
U
0.174
1.50
1 06/15/2020 01:50
WG1492364
(S) Toluene-d8
105
80.0-120
0611512020 01.50
WG1492364
(S) 4-Bromof/uorobenzene
95.5
77.0-126
0611512020 01:50
WG1492364
FSC
(S)1,2-Dich/oroethane-d4
109
70.0-130
0611512020 01.50
WG1492364
ACCOUNT:
PROJECT:
SDG:
DATE/TIME: PAGE:
AECOM -
Raleigh, NC
60628609
L1228253
06/22/20 11:07 6 of 25

MW-3 SAMPLE RESULTS - 02 ONE LAB. NATIONWIDE.
Collected date/time: 06/10/20 13:20 L1228253
Volatile Organic Compounds (GC/MS) by Method 8260D
Result
Qualifier MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
Acetone
U
11.3
25.0
1 06/15/2020 02:09
WG1492364
Acrylonitrile
U
0.671
5.00
1 06/15/2020 02:09
WG1492364
Benzene
U
0.0941
0.500
1 06/15/2020 02:09
WG1492364
Bromobenzene
U
0.118
0.500
1 06/15/2020 02:09
WG1492364
Bromodichloromethane
U
0.136
0.500
1 06/15/2020 02:09
WG1492364
Bromochloromethane
U
0.128
0.500
1 06/15/2020 02:09
WG1492364
Bromoform
U
0.129
0.500
1 06/15/2020 02:09
WG1492364
Bromomethane
U
0.605
2.50
1 06/15/2020 02:09
WG1492364
n-Butylbenzene
U
0.157
0.500
1 06/15/2020 02:09
WG1492364
sec -Butyl benzene
U
0.125
0.500
1 06/15/2020 02:09
WG1492364
ter[-Butylbenzene
U
0.127
0.500
1 06/15/2020 02:09
WG1492364
Carbon disulfide
U
0.0962
0.500
1 06/15/2020 02:09
WG1492364
Carbon tetrachloride
U
0.128
0.500
1 06/15/2020 02:09
WG1492364
Chlorobenzene
U
0.117
0.500
1 06/15/2020 02:09
WG1492364
Chlorodibromomethane
U
0.140
0.500
1 06/15/2020 02:09
WG1492364
Chloroethane
U
0.192
2.50
1 06/15/2020 02:09
WG1492364
2-Chloroethyl vinyl ether
U
0.575
50.0
1 06/15/2020 02:09
WG1492364
Chloroform
U
0.111
0.500
1 06/15/2020 02:09
WG1492364
Chloromethane
U
0.960
1.25
1 06/15/2020 02:09
WG1492364
2-Chlorotoluene
U
0.106
0.500
1 06/15/2020 02:09
WG1492364
4-Chlorotoluene
U
0.114
0.500
1 06/15/2020 02:09
WG1492364
1,2-Dibromo-3-Chloropropane
U
0.276
2.50
1 06/15/2020 02:09
WG1492364
1,2-Dibromoethane
U
0.126
0.500
1 06/15/2020 02:09
WG1492364
Dibromomethane
U
0.122
0.500
1 06/15/2020 02:09
WG1492364
1,2-Dichlorobenzene
U
0.107
0.500
1 06/15/2020 02:09
WG1492364
1,3-Dichlorobenzene
U
0.299
0.500
1 06/15/2020 02:09
WG1492364
1,4-Dichlorobenzene
U
0.120
0.500
1 06/15/2020 02:09
WG1492364
Dichlorodifluoromethane
U
0.374
2.50
1 06/15/2020 02:09
WG1492364
1,1-Dichloroethane
U
0.100
0.500
1 06/15/2020 02:09
WG1492364
1,2-Dichloroethane
U
0.0819
0.500
1 06/15/2020 02:09
WG1492364
M-Dichloroethene
0.241
J 0.188
0.500
1 06/15/2020 02:09
WG1492364
cis-1,2-Dichloroethene
144
0.126
0.500
1 06/15/2020 02:09
WG1492364
trans-1,2-Dichloroethene
1.53
0.149
0.500
1 06/15/2020 02:09
WG1492364
1,2-Dichloropropane
U
0.149
0.500
1 06/15/2020 02:09
WG1492364
1,1-Dichloropropene
U
0.142
0.500
1 06/15/2020 02:09
WG1492364
1,3-Dichloropropane
U
0.109
1.00
1 06/15/2020 02:09
WG1492364
cis-1,3-Dichloropropene
U
0.111
0.500
1 06/15/2020 02:09
WG1492364
trans-1,3-Dichloropropene
U
0.118
0.500
1 06/15/2020 02:09
WG1492364
trans-1,4-Dichloro-2-butene
U
0.467
5.00
1 06/15/2020 02:09
WG1492364
2,2-Dichloropropane
U
0.161
0.500
1 06/15/2020 02:09
WG1492364
Di -isopropyl ether
U
0.105
0.500
1 06/15/2020 02:09
WG1492364
Ethylbenzene
U
0.137
0.500
1 06/15/2020 02:09
WG1492364
Hexachloro-1,3-butadiene
U
J0 0.337
1.00
1 06/15/2020 02:09
WG1492364
2-Hexanone
U
0.787
5.00
1 06/15/2020 02:09
WG1492364
n-Hexane
U
0.749
5.00
1 06/15/2020 02:09
WG1492364
lodomethane
U
0.554
5.00
1 06/15/2020 02:09
WG1492364
Isopropylbenzene
U
0.105
0.500
1 06/15/2020 02:09
WG1492364
p-Isopropyltoluene
U
0.120
0.500
1 06/15/2020 02:09
WG1492364
2-Butanone (MEK)
U
1.19
5.00
1 06/15/2020 02:09
WG1492364
Methylene Chloride
U
0.430
2.50
1 06/15/2020 02:09
WG1492364
4-Methyl-2-pentanone (MIBK)
U
0.478
5.00
1 06/15/2020 02:09
WG1492364
Methyl tert-butyl ether
U
0.101
0.500
1 06/15/2020 02:09
WG1492364
Naphthalene
U
0.174
2.50
1 06/15/2020 02:09
WG1492364
n-Propylbenzene
U
0.0993
0.500
1 06/15/2020 02:09
WG1492364
Styrene
U
0.118
0.500
1 06/15/2020 02:09
WG1492364
1,1,1,2-Tetrachloroethane
U
0.147
0.500
1 06/15/2020 02:09
WG1492364
FP1
FTc
FSS
4
Cn
Fc
F ql
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 7 of 25

ONE LAB. NATIONWIDE.
MW-3 SAMPLE RESULTS - 02
Collected date/time: 06/10/20 13:20 L1228253
Volatile Organic Compounds (GC/MS) by Method 8260D
Analyte
1,1,2,2-TetrachIoroetha ne
1,1,2-TrichIorotrifluoroethane
Tetrachloroethene
Toluene
1,2,3-Trichlorobe nzene
1,2,4-Trichlorobenzene
1,1,1-Trich t o ro eth a n e
1,1,2-Trich I oroetha n e
Trichloroethene
Trichlorofluoromethane
1,2,3-Trichloropropane
1,2,4-Tri methyl ben zen e
1,2,3-Trimethyl benzene
1,3,5-Trimethyl benzene
Vinyl acetate
Vinyl chloride
Xylenes, Total
(S) Toluene-d8
(S) Toluene-d8
(S) 4-Bromof/uorobenzene
(S) 4-Bromofluorobenzene
(S) 1,2-Dich/oroethone-d4
(S 1,2-Dich/oroethane-d4
Result
ug/I
Qualifier MDL
ug/I
RDL
ug/I
Dilution Analysis
date / time
IJ
0.133
0.500
1 06/15/2020 02:09
1.55
0.180
0.500
1 06/15/2020 02:09
365
3.00
5.00
10 06/18/202016:55
IJ
0.278
0.500
1 06/15/2020 02:09
IJ
0.164
0.500
1 06/15/2020 02:09
J
J0 0.481
1.00
1 06/15/2020 02:09
IJ
0.149
0.500
1 06/15/2020 02:09
J
0.158
0.500
1 06/15/2020 02:09
79.2
0.190
0.500
1 06/15/2020 02:09
IJ
0.160
2.50
1 06/15/2020 02:09
IJ
0.237
2.50
1 06/15/2020 02:09
IJ
0.322
0.500
1 06/15/2020 02:09
IJ
0.104
0.500
1 06/15/2020 02:09
IJ
0.104
0.500
1 06/15/2020 02:09
IJ
0.692
5.00
1 06/15/2020 02:09
3.58
0.234
0.500
1 06/15/2020 02:09
IJ
0.174
1.50
1 06/15/2020 02:09
104
80.0-120
0611512020 02.09
104
80.0-120
061181202016:55
98.1
77.0-126
0611512020 02.09
101
77.0-126
061181202016:55
108
70.0-130
0611512020 02.09
105
70.0-130
061181202016:55
Batch
WG1492364
WG1492364
WG1495099
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1492364
WG1495099
WG1492364
WG1495099
WG1492364
WG1495099
Fp
FTc
FS
Fn
N
FC]
F
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 8 of 25

MW-5 SAMPLE RESULTS - 03 ONE LAB. NATIONWIDE.
Collected date/time: 06/10/20 12:45 L1228253
Volatile Organic Compounds (GC/MS) by Method 8260D
Result
Qualifier MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
Acetone
U
11.3
25.0
1 06/15/2020 02:29
WG1492364
Acrylonitrile
U
0.671
5.00
1 06/15/2020 02:29
WG1492364
Benzene
U
0.0941
0.500
1 06/15/2020 02:29
WG1492364
Bromobenzene
U
0.118
0.500
1 06/15/2020 02:29
WG1492364
Bromodichloromethane
U
0.136
0.500
1 06/15/2020 02:29
WG1492364
Bromochloromethane
U
0.128
0.500
1 06/15/2020 02:29
WG1492364
Bromoform
U
0.129
0.500
1 06/15/2020 02:29
WG1492364
Bromomethane
U
0.605
2.50
1 06/15/2020 02:29
WG1492364
n-Butylbenzene
U
0.157
0.500
1 06/15/2020 02:29
WG1492364
sec -Butyl benzene
U
0.125
0.500
1 06/15/2020 02:29
WG1492364
ter[-Butylbenzene
U
0.127
0.500
1 06/15/2020 02:29
WG1492364
Carbon disulfide
U
0.0962
0.500
1 06/15/2020 02:29
WG1492364
Carbon tetrachloride
U
0.128
0.500
1 06/15/2020 02:29
WG1492364
Chlorobenzene
U
0.117
0.500
1 06/15/2020 02:29
WG1492364
Chlorodibromomethane
U
0.140
0.500
1 06/15/2020 02:29
WG1492364
Chloroethane
U
0.192
2.50
1 06/15/2020 02:29
WG1492364
2-Chloroethyl vinyl ether
U
0.575
50.0
1 06/15/2020 02:29
WG1492364
Chloroform
U
0.111
0.500
1 06/15/2020 02:29
WG1492364
Chloromethane
U
0.960
1.25
1 06/15/2020 02:29
WG1492364
2-Chlorotoluene
U
0.106
0.500
1 06/15/2020 02:29
WG1492364
4-Chlorotoluene
U
0.114
0.500
1 06/15/2020 02:29
WG1492364
1,2-Dibromo-3-Chloropropane
U
0.276
2.50
1 06/15/2020 02:29
WG1492364
1,2-Dibromoethane
U
0.126
0.500
1 06/15/2020 02:29
WG1492364
Dibromomethane
U
0.122
0.500
1 06/15/2020 02:29
WG1492364
1,2-Dichlorobenzene
U
0.107
0.500
1 06/15/2020 02:29
WG1492364
1,3-Dichlorobenzene
U
0.299
0.500
1 06/15/2020 02:29
WG1492364
1,4-Dichlorobenzene
U
0.120
0.500
1 06/15/2020 02:29
WG1492364
Dichlorodifluoromethane
U
0.374
2.50
1 06/15/2020 02:29
WG1492364
1,1-Dichloroethane
U
0.100
0.500
1 06/15/2020 02:29
WG1492364
1,2-Dichloroethane
U
0.0819
0.500
1 06/15/2020 02:29
WG1492364
M-Dichloroethene
U
0.188
0.500
1 06/15/2020 02:29
WG1492364
cis-1,2-Dichloroethene
0.228
J 0.126
0.500
1 06/15/2020 02:29
WG1492364
trans-1,2-Dichloroethene
U
0.149
0.500
1 06/15/2020 02:29
WG1492364
1,2-Dichloropropane
U
0.149
0.500
1 06/15/2020 02:29
WG1492364
1,1-Dichloropropene
U
0.142
0.500
1 06/15/2020 02:29
WG1492364
1,3-Dichloropropane
U
0.109
1.00
1 06/15/2020 02:29
WG1492364
cis-1,3-Dichloropropene
U
0.111
0.500
1 06/15/2020 02:29
WG1492364
trans-1,3-Dichloropropene
U
0.118
0.500
1 06/15/2020 02:29
WG1492364
trans-1,4-Dichloro-2-butene
U
0.467
5.00
1 06/15/2020 02:29
WG1492364
2,2-Dichloropropane
U
0.161
0.500
1 06/15/2020 02:29
WG1492364
Di -isopropyl ether
U
0.105
0.500
1 06/15/2020 02:29
WG1492364
Ethylbenzene
U
0.137
0.500
1 06/15/2020 02:29
WG1492364
Hexachloro-1,3-butadiene
U
J0 0.337
1.00
1 06/15/2020 02:29
WG1492364
2-Hexanone
U
0.787
5.00
1 06/15/2020 02:29
WG1492364
n-Hexane
U
0.749
5.00
1 06/15/2020 02:29
WG1492364
lodomethane
U
0.554
5.00
1 06/15/2020 02:29
WG1492364
Isopropylbenzene
U
0.105
0.500
1 06/15/2020 02:29
WG1492364
p-Isopropyltoluene
U
0.120
0.500
1 06/15/2020 02:29
WG1492364
2-Butanone (MEK)
U
1.19
5.00
1 06/15/2020 02:29
WG1492364
Methylene Chloride
U
0.430
2.50
1 06/15/2020 02:29
WG1492364
4-Methyl-2-pentanone (MIBK)
U
0.478
5.00
1 06/15/2020 02:29
WG1492364
Methyl tert-butyl ether
U
0.101
0.500
1 06/15/2020 02:29
WG1492364
Naphthalene
U
0.174
2.50
1 06/15/2020 02:29
WG1492364
n-Propylbenzene
U
0.0993
0.500
1 06/15/2020 02:29
WG1492364
Styrene
U
0.118
0.500
1 06/15/2020 02:29
WG1492364
1,1,1,2-Tetrachloroethane
U
0.147
0.500
1 06/15/2020 02:29
WG1492364
FP1
FTc
FSS
4
Cn
Fc
F ql
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 9 of 25

MW-5 SAMPLE
Collected date/time: 06/10/20 12:45
Volatile Organic Compounds (GC/MS) by Method 8260D
RESULTS - 03
L1228253
ONE LAB. NATIONWIDE.
Result Qualifier
MDL
RDL
Dilution Analysis
Batch
F
Analyte
ug/I
ug/I
ug/I
date / time
1,1,2,2-Tetrachloroethane
U
0.133
0.500
1 06/15/2020 02:29
WG1492364
FTc
1,1,2-Trichlorotrifluoroethane
U
0.180
0.500
1 06/15/2020 02:29
WG1492364
Tetrachloroethene
U
0.300
0.500
1 06/18/202017:14
WG1495099
Toluene
U
0.278
0.500
1 06/15/2020 02:29
WG1492364
FS
1,2,3-Trichlorobenzene
U
0.164
0.500
1 06/15/2020 02:29
WG1492364
1,2,4-Trichlorobenzene
U J0
0.481
1.00
1 06/15/2020 02:29
WG1492364
Fn
1,1,1-Trichloroethane
U
0.149
0.500
1 06/15/2020 02:29
WG1492364
1,1,2-Trichloroethane
U
0.158
0.500
1 06/15/2020 02:29
WG1492364
Trichloroethene
U
0.190
0.500
1 06/15/2020 02:29
WG1492364
Trichlorofluoromethane
U
0.160
2.50
1 06/15/2020 02:29
WG1492364
1,2,3-Trichloropropane
U
0.237
2.50
1 06/15/2020 02:29
WG1492364
6
QC
1,2,4-Trimethylbenzene
U
0.322
0.500
1 06/15/2020 02:29
WG1492364
1,2,3-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 02:29
WG1492364
1,3,5-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 02:29
WG1492364
GI
Vinyl acetate
U
0.692
5.00
1 06/15/2020 02:29
WG1492364
Vinyl chloride
U
0.234
0.500
1 06/15/2020 02:29
WG1492364
FAI
Xylenes, Total
U
0.174
1.50
1 06/15/2020 02:29
WG1492364
(S) Toluene-d8
106
80.0-120
0611512020 02:29
WG1492364
(S) Toluene-d8
104
80.0-120
061181202017.74
WG1495099
FSC
(S) 4-Bromof/uorobenzene
96.1
77.0-126
0611512020 02:29
WG1492364
(S) 4-Bromofluorobenzene
100
77.0-126
061181202017.74
WG1495099
(S)1,2-Dich/oroethane-d4
109
70.0-130
0611512020 02:29
WG1492364
(S)1,2-Dich/oroethane-d4
104
70.0-130
061181202017.74
WG1495099
ACCOUNT:
PROJECT:
SDG:
DATE/TIME: PAGE:
AECOM -
Raleigh, NC
60628609
L1228253
06/22/20 11:07 10 of 25

2 W-10 SAMPLE RESULTS - 04 ONE LAB. NATIONWIDE.
Collected date/time: 06/10/20 13:50 L1228253
Volatile Organic Compounds (GC/MS) by Method 8260D
Result
Qualifier MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
Acetone
U
11.3
25.0
1 06/15/2020 02:48
WG1492364
Acrylonitrile
U
0.671
5.00
1 06/15/2020 02:48
WG1492364
Benzene
U
0.0941
0.500
1 06/15/2020 02:48
WG1492364
Bromobenzene
U
0.118
0.500
1 06/15/2020 02:48
WG1492364
Bromodichloromethane
U
0.136
0.500
1 06/15/2020 02:48
WG1492364
Bromochloromethane
U
0.128
0.500
1 06/15/2020 02:48
WG1492364
Bromoform
U
0.129
0.500
1 06/15/2020 02:48
WG1492364
Bromomethane
U
0.605
2.50
1 06/15/2020 02:48
WG1492364
n-Butylbenzene
U
0.157
0.500
1 06/15/2020 02:48
WG1492364
sec -Butyl benzene
U
0.125
0.500
1 06/15/2020 02:48
WG1492364
ter[-Butylbenzene
U
0.127
0.500
1 06/15/2020 02:48
WG1492364
Carbon disulfide
U
0.0962
0.500
1 06/15/2020 02:48
WG1492364
Carbon tetrachloride
U
0.128
0.500
1 06/15/2020 02:48
WG1492364
Chlorobenzene
U
0.117
0.500
1 06/15/2020 02:48
WG1492364
Chlorodibromomethane
U
0.140
0.500
1 06/15/2020 02:48
WG1492364
Chloroethane
U
0.192
2.50
1 06/15/2020 02:48
WG1492364
2-Chloroethyl vinyl ether
U
0.575
50.0
1 06/15/2020 02:48
WG1492364
Chloroform
U
0.111
0.500
1 06/15/2020 02:48
WG1492364
Chloromethane
U
0.960
1.25
1 06/15/2020 02:48
WG1492364
2-Chlorotoluene
U
0.106
0.500
1 06/15/2020 02:48
WG1492364
4-Chlorotoluene
U
0.114
0.500
1 06/15/2020 02:48
WG1492364
1,2-Dibromo-3-Chloropropane
U
0.276
2.50
1 06/15/2020 02:48
WG1492364
1,2-Dibromoethane
U
0.126
0.500
1 06/15/2020 02:48
WG1492364
Dibromomethane
U
0.122
0.500
1 06/15/2020 02:48
WG1492364
1,2-Dichlorobenzene
U
0.107
0.500
1 06/15/2020 02:48
WG1492364
1,3-Dichlorobenzene
U
0.299
0.500
1 06/15/2020 02:48
WG1492364
1,4-Dichlorobenzene
U
0.120
0.500
1 06/15/2020 02:48
WG1492364
Dichlorodifluoromethane
U
0.374
2.50
1 06/15/2020 02:48
WG1492364
1,1-Dichloroethane
U
0.100
0.500
1 06/15/2020 02:48
WG1492364
1,2-Dichloroethane
U
0.0819
0.500
1 06/15/2020 02:48
WG1492364
M-Dichloroethene
U
0.188
0.500
1 06/15/2020 02:48
WG1492364
cis-1,2-Dichloroethene
101
0.126
0.500
1 06/15/2020 02:48
WG1492364
trans-1,2-Dichloroethene
0.473
J 0.149
0.500
1 06/15/2020 02:48
WG1492364
1,2-Dichloropropane
U
0.149
0.500
1 06/15/2020 02:48
WG1492364
1,1-Dichloropropene
U
0.142
0.500
1 06/15/2020 02:48
WG1492364
1,3-Dichloropropane
U
0.109
1.00
1 06/15/2020 02:48
WG1492364
cis-1,3-Dichloropropene
U
0.111
0.500
1 06/15/2020 02:48
WG1492364
trans-1,3-Dichloropropene
U
0.118
0.500
1 06/15/2020 02:48
WG1492364
trans-1,4-Dichloro-2-butene
U
0.467
5.00
1 06/15/2020 02:48
WG1492364
2,2-Dichloropropane
U
0.161
0.500
1 06/15/2020 02:48
WG1492364
Di -isopropyl ether
U
0.105
0.500
1 06/15/2020 02:48
WG1492364
Ethylbenzene
U
0.137
0.500
1 06/15/2020 02:48
WG1492364
Hexachloro-1,3-butadiene
U
J0 0.337
1.00
1 06/15/2020 02:48
WG1492364
2-Hexanone
U
0.787
5.00
1 06/15/2020 02:48
WG1492364
n-Hexane
U
0.749
5.00
1 06/15/2020 02:48
WG1492364
lodomethane
U
0.554
5.00
1 06/15/2020 02:48
WG1492364
Isopropylbenzene
U
0.105
0.500
1 06/15/2020 02:48
WG1492364
p-Isopropyltoluene
U
0.120
0.500
1 06/15/2020 02:48
WG1492364
2-Butanone (MEK)
U
1.19
5.00
1 06/15/2020 02:48
WG1492364
Methylene Chloride
U
0.430
2.50
1 06/15/2020 02:48
WG1492364
4-Methyl-2-pentanone (MIBK)
U
0.478
5.00
1 06/15/2020 02:48
WG1492364
Methyl tert-butyl ether
U
0.101
0.500
1 06/15/2020 02:48
WG1492364
Naphthalene
U
0.174
2.50
1 06/15/2020 02:48
WG1492364
n-Propylbenzene
U
0.0993
0.500
1 06/15/2020 02:48
WG1492364
Styrene
U
0.118
0.500
1 06/15/2020 02:48
WG1492364
1,1,1,2-Tetrachloroethane
U
0.147
0.500
1 06/15/2020 02:48
WG1492364
FP1
FTc
FSS
4
Cn
Fc
F ql
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 11 of 25

2 W-10 SAMPLE
Collected date/time: 06/10/20 13:50
Volatile Organic Compounds (GC/MS) by Method 8260D
RESULTS - 04
L1228253
ONE LAB. NATIONWIDE.
f
Result Qualifier
MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
l
1,1,2,2-Tetrachloroethane
U
0.133
0.500
1 06/15/2020 02:48
WG1492364 f
1,1,2-Trichlorotrifluoroethane
IJ
0.180
0.500
1 06/15/2020 02:48
WG1492364 Il
Tetrachloroethene
18.0
0.300
0.500
1 06/15/2020 02:48
WG1492364
Toluene
U
0.278
0.500
1 06/15/2020 02:48
WG1492364
1,2,3-Trichlorobenzene
U
0.164
0.500
1 06/15/2020 02:48
WG1492364
1,2,4-Trichlorobenzene
J J0
0.481
1.00
1 06/15/2020 02:48
WG1492364 f
1,1,1-Trichloroethane
U
0.149
0.500
1 06/15/2020 02:48
WG1492364 Il
1,1,2-Trichloroethane
J
0.158
0.500
1 06/15/2020 02:48
WG1492364
Trichloroethene
36.5
0.190
0.500
1 06/15/2020 02:48
WG1492364
I
Trichlorofluoromethane
U
0.160
2.50
1 06/15/2020 02:48
WG1492364
1,2,3-Trichloropropane
U
0.237
2.50
1 06/15/2020 02:48
WG1492364 f
1,2,4-Trimethylbenzene
U
0.322
0.500
1 06/15/2020 02:48
WG1492364 Il
1,2,3-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 02:48
WG1492364
1,3,5-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 02:48
WG1492364
Vinyl acetate
U
0.692
5.00
1 06/15/2020 02:48
WG1492364
Vinyl chloride
2.20
0.234
0.500
1 06/15/2020 02:48
WG1492364 f
Xylenes, Total
U
0.174
1.50
1 06/15/2020 02:48
WG1492364 Il
(S) Toluene-d8
105
80.0-120
0611512020 02.48
WG1492364
(S) 4-Bromof/uorobenzene
96.3
77.0-126
0611512020 02.48
WG1492364
(S)1,2-Dich/oroethone-d4
111
70.0-130
0611512020 02.48
WG1492364
ACCOUNT:
PROJECT:
SDG:
DATE/TIME: PAGE:
AECOM -
Raleigh, NC
60628609
L1228253
06/22/20 11:07 12 of 25

2 W-11 SAMPLE RESULTS - 05 ONE LAB. NATIONWIDE.
Collected date/time: 06/10/20 14:20 L1228253
Volatile Organic Compounds (GC/MS) by Method 8260D
Result
Qualifier MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
Acetone
U
11.3
25.0
1 06/15/2020 03:07
WG1492364
Acrylonitrile
U
0.671
5.00
1 06/15/2020 03:07
WG1492364
Benzene
U
0.0941
0.500
1 06/15/2020 03:07
WG1492364
Bromobenzene
U
0.118
0.500
1 06/15/2020 03:07
WG1492364
Bromodichloromethane
U
0.136
0.500
1 06/15/2020 03:07
WG1492364
Bromochloromethane
U
0.128
0.500
1 06/15/2020 03:07
WG1492364
Bromoform
U
0.129
0.500
1 06/15/2020 03:07
WG1492364
Bromomethane
U
0.605
2.50
1 06/15/2020 03:07
WG1492364
n-Butylbenzene
U
0.157
0.500
1 06/15/2020 03:07
WG1492364
sec -Butyl benzene
U
0.125
0.500
1 06/15/2020 03:07
WG1492364
ter[-Butylbenzene
U
0.127
0.500
1 06/15/2020 03:07
WG1492364
Carbon disulfide
U
0.0962
0.500
1 06/15/2020 03:07
WG1492364
Carbon tetrachloride
U
0.128
0.500
1 06/15/2020 03:07
WG1492364
Chlorobenzene
U
0.117
0.500
1 06/15/2020 03:07
WG1492364
Chlorodibromomethane
U
0.140
0.500
1 06/15/2020 03:07
WG1492364
Chloroethane
U
0.192
2.50
1 06/15/2020 03:07
WG1492364
2-Chloroethyl vinyl ether
U
0.575
50.0
1 06/15/2020 03:07
WG1492364
Chloroform
U
0.111
0.500
1 06/15/2020 03:07
WG1492364
Chloromethane
U
0.960
1.25
1 06/15/2020 03:07
WG1492364
2-Chlorotoluene
U
0.106
0.500
1 06/15/2020 03:07
WG1492364
4-Chlorotoluene
U
0.114
0.500
1 06/15/2020 03:07
WG1492364
1,2-Dibromo-3-Chloropropane
U
0.276
2.50
1 06/15/2020 03:07
WG1492364
1,2-Dibromoethane
U
0.126
0.500
1 06/15/2020 03:07
WG1492364
Dibromomethane
U
0.122
0.500
1 06/15/2020 03:07
WG1492364
1,2-Dichlorobenzene
U
0.107
0.500
1 06/15/2020 03:07
WG1492364
1,3-Dichlorobenzene
U
0.299
0.500
1 06/15/2020 03:07
WG1492364
1,4-Dichlorobenzene
U
0.120
0.500
1 06/15/2020 03:07
WG1492364
Dichlorodifluoromethane
U
0.374
2.50
1 06/15/2020 03:07
WG1492364
1,1-Dichloroethane
U
0.100
0.500
1 06/15/2020 03:07
WG1492364
1,2-Dichloroethane
U
0.0819
0.500
1 06/15/2020 03:07
WG1492364
M-Dichloroethene
U
0.188
0.500
1 06/15/2020 03:07
WG1492364
cis-1,2-Dichloroethene
67.9
0.126
0.500
1 06/15/2020 03:07
WG1492364
trans-1,2-Dichloroethene
0.292
J 0.149
0.500
1 06/15/2020 03:07
WG1492364
1,2-Dichloropropane
U
0.149
0.500
1 06/15/2020 03:07
WG1492364
1,1-Dichloropropene
U
0.142
0.500
1 06/15/2020 03:07
WG1492364
1,3-Dichloropropane
U
0.109
1.00
1 06/15/2020 03:07
WG1492364
cis-1,3-Dichloropropene
U
0.111
0.500
1 06/15/2020 03:07
WG1492364
trans-1,3-Dichloropropene
U
0.118
0.500
1 06/15/2020 03:07
WG1492364
trans-1,4-Dichloro-2-butene
U
0.467
5.00
1 06/15/2020 03:07
WG1492364
2,2-Dichloropropane
U
0.161
0.500
1 06/15/2020 03:07
WG1492364
Di -isopropyl ether
U
0.105
0.500
1 06/15/2020 03:07
WG1492364
Ethylbenzene
U
0.137
0.500
1 06/15/2020 03:07
WG1492364
Hexachloro-1,3-butadiene
U
J0 0.337
1.00
1 06/15/2020 03:07
WG1492364
2-Hexanone
U
0.787
5.00
1 06/15/2020 03:07
WG1492364
n-Hexane
U
0.749
5.00
1 06/15/2020 03:07
WG1492364
lodomethane
U
0.554
5.00
1 06/15/2020 03:07
WG1492364
Isopropylbenzene
U
0.105
0.500
1 06/15/2020 03:07
WG1492364
p-Isopropyltoluene
U
0.120
0.500
1 06/15/2020 03:07
WG1492364
2-Butanone (MEK)
U
1.19
5.00
1 06/15/2020 03:07
WG1492364
Methylene Chloride
U
0.430
2.50
1 06/15/2020 03:07
WG1492364
4-Methyl-2-pentanone (MIBK)
U
0.478
5.00
1 06/15/2020 03:07
WG1492364
Methyl tert-butyl ether
U
0.101
0.500
1 06/15/2020 03:07
WG1492364
Naphthalene
U
0.174
2.50
1 06/15/2020 03:07
WG1492364
n-Propylbenzene
U
0.0993
0.500
1 06/15/2020 03:07
WG1492364
Styrene
U
0.118
0.500
1 06/15/2020 03:07
WG1492364
1,1,1,2-Tetrachloroethane
U
0.147
0.500
1 06/15/2020 03:07
WG1492364
FP1
FTc
FSS
4
Cn
Fc
F ql
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 13 of 25

2 W-11 SAMPLE
Collected date/time: 06/10/20 14:20
Volatile Organic Compounds (GC/MS) by Method 8260D
RESULTS - 05
L1228253
ONE LAB. NATIONWIDE.
f
Result Qualifier
MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
l
1,1,2,2-Tetrachloroethane
U
0.133
0.500
1 06/15/2020 03:07
WG1492364 f
1,1,2-Trichlorotrifluoroethane
U
0.180
0.500
1 06/15/2020 03:07
WG1492364 Il
Tetrachloroethene
11.4
0.300
0.500
1 06/15/2020 03:07
WG1492364
Toluene
U
0.278
0.500
1 06/15/2020 03:07
WG1492364
1,2,3-Trichlorobenzene
IJ
0.164
0.500
1 06/15/2020 03:07
WG1492364
1,2,4-Trichlorobenzene
IJ J0
0.481
1.00
1 06/15/2020 03:07
WG1492364 f
1,1,1-Trichloroethane
U
0.149
0.500
1 06/15/2020 03:07
WG1492364 Il
1,1,2-Trichloroethane
J
0.158
0.500
1 06/15/2020 03:07
WG1492364
Trichloroethene
24.2
0.190
0.500
1 06/15/2020 03:07
WG1492364
I
Trichlorofluoromethane
J
0.160
2.50
1 06/15/2020 03:07
WG1492364
1,2,3-Trichloropropane
U
0.237
2.50
1 06/15/2020 03:07
WG1492364 f
1,2,4-Trimethylbenzene
U
0.322
0.500
1 06/15/2020 03:07
WG1492364 Il
1,2,3-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 03:07
WG1492364
1,3,5-Trimethyl benzene
U
0.104
0.500
1 06/15/2020 03:07
WG1492364
Vinyl acetate
IJ
0.692
5.00
1 06/15/2020 03:07
WG1492364
Vinyl chloride
1.43
0.234
0.500
1 06/15/2020 03:07
WG1492364 f
Xylenes, Total
IJ
0.174
1.50
1 06/15/2020 03:07
WG1492364 Il
(S) Toluene-d8
104
80.0-120
0611512020 03:07
WG1492364
(S) 4-Bromof/uorobenzene
96.4
77.0-126
0611512020 03:07
WG1492364
(S)1,2-Dich/oroethone-d4
112
70.0-130
0611512020 03:07
WG1492364
ACCOUNT:
PROJECT:
SDG:
DATE/TIME: PAGE:
AECOM -
Raleigh, NC
60628609
L1228253
06/22/20 11:07 14 of 25

2 W -12 SAMPLE RESULTS - 06 ONE LAB. NATIONWIDE.
Collected date/time: 06/10/20 12:00 L1228253
Volatile Organic Compounds (GC/MS) by Method 8260D
Result
Qualifier MDL
RDL
Dilution Analysis
Batch
Analyte
ug/I
ug/I
ug/I
date / time
Acetone
U
11.3
25.0
1 06/15/2020 03:26
WG1492364
Acrylonitrile
U
0.671
5.00
1 06/15/2020 03:26
WG1492364
Benzene
U
0.0941
0.500
1 06/15/2020 03:26
WG1492364
Bromobenzene
U
0.118
0.500
1 06/15/2020 03:26
WG1492364
Bromodichloromethane
U
0.136
0.500
1 06/15/2020 03:26
WG1492364
Bromochloromethane
U
0.128
0.500
1 06/15/2020 03:26
WG1492364
Bromoform
U
0.129
0.500
1 06/15/2020 03:26
WG1492364
Bromomethane
U
0.605
2.50
1 06/15/2020 03:26
WG1492364
n-Butylbenzene
U
0.157
0.500
1 06/15/2020 03:26
WG1492364
sec -Butyl benzene
U
0.125
0.500
1 06/15/2020 03:26
WG1492364
ter[-Butylbenzene
U
0.127
0.500
1 06/15/2020 03:26
WG1492364
Carbon disulfide
U
0.0962
0.500
1 06/15/2020 03:26
WG1492364
Carbon tetrachloride
U
0.128
0.500
1 06/15/2020 03:26
WG1492364
Chlorobenzene
U
0.117
0.500
1 06/15/2020 03:26
WG1492364
Chlorodibromomethane
U
0.140
0.500
1 06/15/2020 03:26
WG1492364
Chloroethane
U
0.192
2.50
1 06/15/2020 03:26
WG1492364
2-Chloroethyl vinyl ether
U
0.575
50.0
1 06/15/2020 03:26
WG1492364
Chloroform
0.147
J 0.111
0.500
1 06/15/2020 03:26
WG1492364
Chloromethane
U
0.960
1.25
1 06/15/2020 03:26
WG1492364
2-Chlorotoluene
U
0.106
0.500
1 06/15/2020 03:26
WG1492364
4-Chlorotoluene
U
0.114
0.500
1 06/15/2020 03:26
WG1492364
1,2-Dibromo-3-Chloropropane
U
0.276
2.50
1 06/15/2020 03:26
WG1492364
1,2-Dibromoethane
U
0.126
0.500
1 06/15/2020 03:26
WG1492364
Dibromomethane
U
0.122
0.500
1 06/15/2020 03:26
WG1492364
1,2-Dichlorobenzene
U
0.107
0.500
1 06/15/2020 03:26
WG1492364
1,3-Dichlorobenzene
U
0.299
0.500
1 06/15/2020 03:26
WG1492364
1,4-Dichlorobenzene
U
0.120
0.500
1 06/15/2020 03:26
WG1492364
Dichlorodifluoromethane
U
0.374
2.50
1 06/15/2020 03:26
WG1492364
1,1-Dichloroethane
U
0.100
0.500
1 06/15/2020 03:26
WG1492364
1,2-Dichloroethane
U
0.0819
0.500
1 06/15/2020 03:26
WG1492364
M-Dichloroethene
1.03
0.188
0.500
1 06/15/2020 03:26
WG1492364
cis-1,2-Dichloroethene
799
3.15
12.5
25 06/18/202017:34
WG1495099
trans-1,2-Dichloroethene
5.31
0.149
0.500
1 06/15/2020 03:26
WG1492364
1,2-Dichloropropane
U
0.149
0.500
1 06/15/2020 03:26
WG1492364
1,1-Dichloropropene
U
0.142
0.500
1 06/15/2020 03:26
WG1492364
1,3-Dichloropropane
U
0.109
1.00
1 06/15/2020 03:26
WG1492364
cis-1,3-Dichloropropene
U
0.111
0.500
1 06/15/2020 03:26
WG1492364
trans-1,3-Dichloropropene
U
0.118
0.500
1 06/15/2020 03:26
WG1492364
trans-1,4-Dichloro-2-butene
U
0.467
5.00
1 06/15/2020 03:26
WG1492364
2,2-Dichloropropane
U
0.161
0.500
1 06/15/2020 03:26
WG1492364
Di -isopropyl ether
U
0.105
0.500
1 06/15/2020 03:26
WG1492364
Ethylbenzene
U
0.137
0.500
1 06/15/2020 03:26
WG1492364
Hexachloro-1,3-butadiene
U
J0 0.337
1.00
1 06/15/2020 03:26
WG1492364
2-Hexanone
U
0.787
5.00
1 06/15/2020 03:26
WG1492364
n-Hexane
U
0.749
5.00
1 06/15/2020 03:26
WG1492364
lodomethane
U
0.554
5.00
1 06/15/2020 03:26
WG1492364
Isopropylbenzene
U
0.105
0.500
1 06/15/2020 03:26
WG1492364
p-Isopropyltoluene
U
0.120
0.500
1 06/15/2020 03:26
WG1492364
2-Butanone (MEK)
U
1.19
5.00
1 06/15/2020 03:26
WG1492364
Methylene Chloride
U
0.430
2.50
1 06/15/2020 03:26
WG1492364
4-Methyl-2-pentanone (MIBK)
U
0.478
5.00
1 06/15/2020 03:26
WG1492364
Methyl tert-butyl ether
U
0.101
0.500
1 06/15/2020 03:26
WG1492364
Naphthalene
U
0.174
2.50
1 06/15/2020 03:26
WG1492364
n-Propylbenzene
U
0.0993
0.500
1 06/15/2020 03:26
WG1492364
Styrene
U
0.118
0.500
1 06/15/2020 03:26
WG1492364
1,1,1,2-Tetrachloroethane
U
0.147
0.500
1 06/15/2020 03:26
WG1492364
FP1
FTc
FSS
4
Cn
Fc
F ql
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 15 of 25

2 W -12 SAMPLE
Collected date/time: 06/10/20 12:00
Volatile Organic Compounds (GC/MS) by Method 8260D
RESULTS - 06
L1228253
ONE LAB. NATIONWIDE.
Result Qualifier
MDL
RDL
Dilution
Analysis
Batch
F
Analyte
ug/I
ug/I
ug/I
date / time
1,1,2,2-Tetrachloroethane
U
0.133
0.500
1
06/15/2020 03:26
WG1492364
FTc
1,1,2-Trichlorotrifluoroethane
1.80
0.180
0.500
1
06/15/2020 03:26
WG1492364
Tetrachloroethene
1340
7.50
12.5
25
06/18/202017:34
WG1495099
Toluene
U
0.278
0.500
1
06/15/2020 03:26
WG1492364
FS
1,2,3-Trichlorobenzene
U
0.164
0.500
1
06/15/2020 03:26
WG1492364
1,2,4-Trichlorobenzene
J J0
0.481
1.00
1
06/15/2020 03:26
WG1492364
Fn
1,1,1-Trichloroethane
U
0.149
0.500
1
06/15/2020 03:26
WG1492364
1,1,2-Trichloroethane
J
0.158
0.500
1
06/15/2020 03:26
WG1492364
Trichloroethene
228
4.75
12.5
25
06/18/202017:34
WG1495099
Trichlorofluoromethane
J
0.160
2.50
1
06/15/2020 03:26
WG1492364
1,2,3-Trichloropropane
U
0.237
2.50
1
06/15/2020 03:26
WG1492364
6
QC
1,2,4-Trimethylbenzene
U
0.322
0.500
1
06/15/2020 03:26
WG1492364
1,2,3-Trimethyl benzene
U
0.104
0.500
1
06/15/2020 03:26
WG1492364
1,3,5-Trimethyl benzene
U
0.104
0.500
1
06/15/2020 03:26
WG1492364
GI
Vinyl acetate
IJ
0.692
5.00
1
06/15/2020 03:26
WG1492364
Vinyl chloride
U
0.234
0.500
1
06/15/2020 03:26
WG1492364
FAI
Xylenes, Total
U
0.174
1.50
1
06/15/2020 03:26
WG1492364
(S) Toluene-d8
103
80.0-120
0611512020 03:26
WG1492364
(S Toluene-d8
103
80.0-120
061181202017.34
WG1495099
FSC
(S) 4-Bromof/uorobenzene
98.9
77.0-126
0611512020 03:26
WG1492364
(S 4-Bromofluorobenzene
101
77.0-126
061181202017.34
WG1495099
(S) 1,2-Dich/oroethane-d4
108
70.0-130
0611512020 03:26
WG1492364
(S 1,2-Dich/oroethone-d4
104
70.0-130
061181202017.34
WG1495099
ACCOUNT:
PROJECT:
SDG:
DATE/TIME: PAGE:
AECOM -
Raleigh, NC
60628609
L1228253
06/22/20 11:07 16 of 25

WG1492364 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.
Volatile Organic Compounds (GC/MS) by Method 8260D L1228253-01,02,03,04,05,06
Method Blank (MB)
(MB) R3540197-2 06/14/20 21:59
MB Result
Analyte
ug/I
Acetone
U
Acrylonitrile
U
Benzene
U
Bromobenzene
U
Bromodichloromethane
U
Bromochloromethane
U
Bromoform
U
Bromomethane
U
n-Butylbenzene
U
sec -Butyl benzene
U
tert-Butylbenzene
U
Carbon disulfide
U
Carbon tetrachloride
U
Chlorobenzene
U
Chlorodibromomethane
U
Chloroethane
U
2-Chloroethyl vinyl ether
U
Chloroform
U
Chloromethane
U
2-Chlorotoluene
U
4-Chlorotoluene
U
1,2-Dibromo-3-Chloropropane
U
1,2-Dibromoethane
U
Dibromomethane
U
1,2-Dichlorobenzene
U
1,3-Dichlorobenzene
U
1,4-Dichlorobenzene
U
trans-1,4-Dichloro-2-butene
U
Dichlorodifluoromethane
U
1,1-Dichloroethane
U
1,2-Dichloroethane
U
1,1-Dichloroethene
U
cis-1,2-Dichloroethene
U
trans-1,2-Dichloroethene
U
1,2-Dichloropropane
U
1,1-Dichloropropene
U
1,3-Dichloropropane
U
cis-1,3-Dichloropropene
U
trans-1,3-Dichloropropene
U
2,2-Dichloropropane
U
MB Qualifier MB MDL
ug/I
MB RDL
ug/I
11.3
25.0
0.671
5.00
0.0941
0.500
0.118
0.500
0.136
0.500
0.128
0.500
0.129
0.500
0.605
2.50
0.157
0.500
0.125
0.500
0.127
0.500
0.0962
0.500
0.128
0.500
0.117
0.500
0.140
0.500
0.192
2.50
0.575
50.0
0.111
0.500
0.960
1.25
0.106
0.500
0.114
0.500
0.276
2.50
0.126
0.500
0.122
0.500
0.107
0.500
0.299
0.500
0.120
0.500
0.467
5.00
0.374
2.50
0.100
0.500
0.0819
0.500
0.188
0.500
0.126
0.500
0.149
0.500
0.149
0.500
0.142
0.500
0.109
1.00
0.111
0.500
0.118
0.500
0.161
0.500
FP1
FTC
FSS
[Cn]
FSr
�GI
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 17 of 25

WG1492364 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.
Volatile Organic Compounds (GC/MS) by Method 8260D L1228253-01,02,03,04,05,06
Method Blank (MB)
(MB) R3540197-2 06/14/20 21:59
MB Result
Analyte
ug/I
Di -isopropyl ether
U
Ethylbenzene
U
Hexachloro-1,3-butadiene
U
2-Hexanone
U
n-Hexane
U
lodomethane
U
Isopropylbenzene
U
p-Isopropyltoluene
U
2-Butanone (MEK)
U
Methylene Chloride
U
4-Methyl-2-pentanone (MIBK)
U
Methyl tert-butyl ether
U
Naphthalene
U
n-Propylbenzene
U
Styrene
U
1,1,1,2-Tetrachloroethane
U
1,1,2,2-Tetrachloroethane
U
Tetrachloroethene
U
Toluene
U
1,1,2-Trichlorotrifluoroethane
U
1,2,3-Trichlorobenzene
U
1,2,4-Trichlorobenzene
U
1,1,1-Trichloroethane
U
1,1,2-Trichloroethane
U
Trichloroethene
U
Trichlorofluoromethane
U
1,2,3-Trichloropropane
U
1,2,3-Trimethyl benzene
U
1,2,4-Trimethylbenzene
U
1,3,5-Trimethyl benzene
U
Vinyl acetate
U
Vinyl chloride
U
Xylenes, Total
U
(S) Toluene-d8
104
(S) 4-Bromofluorobenzene
95.4
(S)1,2-Dich/oroethane-d4
110
MB Qualifier MB MDL MB RDL
ug/I ug/I
0.105
0.500
0.137
0.500
0.337
1.00
0.787
5.00
0.749
5.00
0.554
5.00
0.105
0.500
0.120
0.500
1.19
5.00
0.430
2.50
0.478
5.00
0.101
0.500
0.174
2.50
0.0993
0.500
0.118
0.500
0.147
0.500
0.133
0.500
0.300
0.500
0.278
0.500
0.180
0.500
0.164
0.500
0.481
1.00
0.149
0.500
0.158
0.500
0.190
0.500
0.160
2.50
0.237
2.50
0.104
0.500
0.322
0.500
0.104
0.500
0.692
5.00
0.234
0.500
0.174
1.50
80.0-120
77.0-126
70.0-130
FP1
FTC
FSS
[Cn]
FSr
�GI
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 18 of 25

WG1492364 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.
Volatile Organic Compounds (GC/MS) by Method 8260D L1228253-01,02,03,04,05,06
Laboratory Control Sample (LCS)
(LCS) R3540197-1 06/14/20 21:01
Spike Amount
Analyte ug/I
Acetone
Acrylonitrile
Benzene
Bromobenzene
Bromodichloromethane
Bromochloromethane
Bromoform
Bromomethane
n-Butylbenzene
sec -Butyl benzene
tert-Butylbenzene
Carbon disulfide
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-Chloroethyl vinyl ether
Chloroform
Chloromethane
2-Chlorotoluene
4-Chlorotoluene
1,2-Dibromo-3-Chloropropane
1,2-Dibromoethane
Dibromomethane
1,2-Dichlorobenzene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
tra ns-1,4-Dich I oro-2-butene
Dichlorodifluoromethane
1,1-Dichloroethane
1,2-Dichloroethane
1,1-Dichloroethene
cis-1,2-Dichloroethene
trans-1,2-Dichloroethene
1,2-Dichloropropane
1,1-Dichloropropene
1,3-Dichloropropane
cis-1,3-Dichloropropene
trans-1,3-Dichloropropene
2,2-Dichloropropane
25.0
25.0
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
25.0
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
LCS Result
ug/I
21.0
25.9
4.92
4.73
4.80
5.44
4.36
5.24
4.54
4.60
4.69
4.72
4.88
5.14
4.88
5.12
24.6
4.72
6.02
4.85
4.89
3.71
5.01
5.01
5.05
4.93
4.98
3.67
5.05
4.98
5.30
4.90
4.78
5.05
5.40
5.04
5.00
4.67
4.67
4.95
LCS Rec.
84.0
104
98.4
94.6
96.0
109
87.2
105
90.8
92.0
93.8
94.4
97.6
103
97.6
102
98.4
94.4
120
97.0
97.8
74.2
100
100
101
98.6
99.6
73.4
101
99.6
106
98.0
95.6
101
108
101
100
93.4
93.4
99.0
Rec. Limits
19.0-160
55.0-149
70.0-123
73.0-121
75.0-120
76.0-122
68.0-132
10.0-160
73.0-125
75.0-125
76.0-124
61.0-128
68.0-126
80.0-121
77.0-125
47.0-150
51.0-160
73.0-120
41.0-142
76.0-123
75.0-122
58.0-134
80.0-122
80.0-120
79.0-121
79.0-120
79.0-120
33.0-144
51.0-149
70.0-126
70.0-128
71.0-124
73.0-120
73.0-120
77.0-125
74.0-126
80.0-120
80.0-123
78.0-124
58.0-130
LCS Qualifier
FP1
FTC
FSS
4
Cn
FSr
�GI
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 19 of 25

WG1492364 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.
Volatile Organic Compounds (GC/MS) by Method 8260D L1228253-01,02,03,04,05,06
Laboratory Control Sample (LCS)
(LCS) R3540197-1 06/14/20 21:01
Spike Amount
Analyte ug/I
Di -isopropyl ether
Ethylbenzene
Hexachloro-1,3-butadiene
2-Hexanone
n-Hexane
lodomethane
Isopropylbenzene
p-Isopropyltoluene
2-Butanone (MEK)
Methylene Chloride
4-Methyl-2-pentanone (MIBK)
Methyl tert-butyl ether
Naphthalene
n-Propylbenzene
Styrene
1,1,1, 2-Tet ra c h l o ro et h a n e
1,1,2,2-Tetrachloroetha ne
Tetrachloroethene
Toluene
1,1,2-Trichlorotrifluoroethane
1,2,3-Trichlorobenzene
1,2,4-Trichlorobenzene
1,1,1-T ri c h l o ro eth a n e
1,1,2-Trich I oroetha n e
Trichloroethene
Trichlorofluoromethane
1,2,3-Trichloropropane
1,2,3-Trim ethyl benzene
1,2,4-Tri methyl ben zen e
1,3,5-Trim ethyl benzene
Vinyl acetate
Vinyl chloride
Xylenes, Total
(S) Toluene-d8
(S) 4-Bromofluorobenzene
(S) 1,2-Dich/oroethane-d4
5.00
5.00
5.00
25.0
5.00
25.0
5.00
5.00
25.0
5.00
25.0
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
5.00
25.0
5.00
15.0
LCS Result
ug/I
5.26
5.08
3.33
23.4
5.12
24.8
4.90
4.71
23.4
5.11
25.0
5.18
4.09
4.91
4.85
5.05
4.71
5.14
4.79
4.53
3.70
3.76
5.36
5.09
5.26
4.88
5.37
4.47
4.73
4.80
21.2
5.54
14.8
LCS Rec
105
102
66.6
93.6
102
99.2
98.0
94.2
93.6
102
100
104
81.8
98.2
97.0
101
94.2
103
95.8
90.6
74.0
75.2
107
102
105
97.6
107
89.4
94.6
96.0
84.8
98.7
102
97.7
109
Rec. Limits LCS Qualifier
58.0-138
79.0-123
54.0-138
67.0-149
57.0-133
33.0-147
76.0-127
76.0-125
44.0-160
67.0-120
68.0-142
68.0-125
54.0-135
77.0-124
73.0-130
75.0-125
65.0-130
72.0-132
79.0-120
69.0-132
50.0-138
57.0-137
73.0-124
80.0-120
78.0-124
59.0-147
73.0-130
77.0-120
76.0-121
76.0-122
11.0-160
67.0-131
79.0-123
80.0-120
77.0-126
70.0-130
FP1
FTC
FSS
[Cn]
FSr
�GI
FAI
FSC
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 20 of 25

WG1495099
Volatile Organic Compounds (GC/MS) by Method 8260D
Method Blank (MB)
QUALITY CONTROL SUMMARY
L1228253-02,03,06
ONE LAB. NATIONWIDE.
(MB) R3540316-4 06/18/2013:07
MB Result
MB Qualifier
MB MDL
MB RDL
Analyte ug/I
ug/I
ug/I
cis-1,2-Dichloroethene U
0.126
0.500
Tetrachloroethene U
0.300
0.500
Trichloroethene U
0.190
0.500
(S) Toluene-d8 103
80.0-120
(S) 4-Bromofluorobenzene 98.0
77.0-126
(S)1,2-Dich/oroethane-d4 105
70.0-130
Laboratory Control Sample (LCS) • Laboratory
Control Sample
Duplicate (LCSD)
(LCS) R3540316-1 06/18/20 11:49 • (LCSD) R3540316-2 06/18/2012:09
Spike Amount
LCS Result
LCSD Result
LCS Rec.
LCSD Rec.
Rec. Limits
LCS Qualifier LCSD Qualifier RPD
RPD Limits
Analyte ug/I
ug/I
ug/I
%
%
%
%
%
cis-1,2-Dichloroethene 5.00
5.19
5.44
104
109
73.0-120
4.70
20
Tetrachloroethene 5.00
5.78
5.80
116
116
72.0-132
0.345
20
Trichloroethene 5.00
5.67
5.76
113
115
78.0-124
1.57
20
(S) Toluene-d8
103
103
80.0-120
(S) 4-Bromofluorobenzene
101
101
77.0-126
(S)1,2-Dich/oroethone-d4
105
105
70.0-130
FP1
FTc
FSS
4
Cn
FSr
�GI
FAI
[Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 21 of 25

GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report
ONE LAB. NATIONWIDE.
The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not
intended as a comprehensive explanation, and if you have additional questions please contact your project representative.
Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name,
Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On -Site Data, Sampling Collection Dates/Times, and
Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.
Abbreviations and Definitions
CP
IP
FTC
FSS
MDL
Method Detection Limit.
RDL
Reported Detection Limit.
[Cn]
Rec.
Recovery.
RPD
Relative Percent Difference.
FSr
SDG
Sample Delivery Group.
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and
(S)
Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be
rqC
detected in all environmental media.
U
Not detected at the Reporting Limit (or MDL where applicable).
Analyte
The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes
reported.
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the
Dilution
standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the
FAI
laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the
result reported has already been corrected for this factor.
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal
Limits
for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or
SC
duplicated within these ranges.
This column provides a letter and/or number designation that corresponds to additional information concerning the result
Qualifier
reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and
potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was
no measurable result returned for a specific analyte, the result in this column may state "ND" (Not Detected) or "BDL"
Result
(Below Detectable Levels). The information in the results column should always be accompanied by either an MDL
(Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect
or report for this analyte.
Uncertainty
(Radiochemistry)
Confidence level of 2 sigma.
A brief discussion about the included sample results, including a discussion of any non -conformances to protocol
Case Narrative (Cn)
observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will
be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.
Quality Control
This section of the report includes the results of the laboratory quality control analyses required by procedure or
Summary (Qc)
analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not
being performed on your samples typically, but on laboratory generated material.
This is the document created in the field when your samples were initially collected. This is used to verify the time and
Sample Chain of
date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This
Custody (Sc)
chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the
samples from the time of collection until delivery to the laboratory for analysis.
This section of your report will provide the results of all testing performed on your samples. These results are provided
Sample Results (Sr)
by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for
each sample will provide the name and method number for the analysis reported.
Sample Summary (Ss)
This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and
times of preparation and/or analysis.
Qualifier
Description
J
The identification of the analyte is acceptable; the reported value is an estimate.
J0
JO: The identification of the analyte is acceptable, but the reported concentration is an estimate. The calibration met
method criteria.
ACCOUNT:
PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC
60628609 L1228253 06/22/20 11:07 22 of 25

ACCREDITATIONS & LOCATIONS ONE LAB. NATIONWIDE.
Pace National is the only environmental laboratory accredited/certified to support your work nationwide from one location. One phone call, one point of contact, one laboratory. No other lab is as
accessible or prepared to handle your needs throughout the country. Our capacity and capability from our single location laboratory is comparable to the collective totals of the network
laboratories in our industry. The most significant benefit to our one location design is the design of our laboratory campus. The model is conducive to accelerated productivity, decreasing FP1
turn -around time, and preventing cross contamination, thus protecting sample integrity. Our focus on premium quality and prompt service allows us to be YOUR LAB OF CHOICE.
Not all certifications held by the laboratory are applicable to the results reported in the attached report.
Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace National. Z
Tc
State Accreditations
f—�
Alabama
40660
Nebraska _
NE-OS-15-05
SS
Alaska
17-026
Nevada
TN-03-2002-34
Arizona
AZO612
New Hampshire
2975
Arkansas
88-0469
New Jersey_NELAP
TNO02
C n
California
2932
New Mexico
n/a
Colorado
TN00003
New York
11742
s
Connecticut
PH-0197
North Carolina
Env375
Sr
Florida
E87487
North Carolina'
DW21704
Georgia
NELAP
North Carolina'
41
Georgia'
923
North Dakota
R-140
RC
Idaho
TN00003
Ohio—VAP
CL0069
Illinois
200008
Oklahoma
9915
Indiana
C-TN-01
Oregon
TN200002
G
Iowa
364
Pennsylvania
68-02979
Kansas
E-10277
Rhode Island
LA000356
Kentucky76
90010
South Carolina
84004
Kentucky 2
16
South Dakota
n/a
Louisiana
A130792
Tennessee' 4
2006
Louisiana'
LA180010
Texas
T104704245-18-15
[SC
Maine
TN0002
Texas'
LABO152
Maryland
324
Utah
Massachusetts
M-TNO03
Vermont
Michigan
9958
Virginia
Minnesota
047-999-395
Washington
Mississippi
TN00003
West Virginia
Missouri
340
Wisconsin
Montana
CERT0086
Wyoming
Third Party
Federal Accreditations
A21LA — ISO 17025
1461.01
AIHA-LAP,LLC EMLAP
A21LA — ISO 17025 5
1461.02
DOD
Canada
1461.01
USDA
EPA—Crypto
TN00003
' Drinking Water 'Underground
Storage Tanks 3 Aquatic Toxicity 4 Chemical/Microbiological 5 Mold
6 Wastewater n/a Accreditation not applicable
Our Locations
TN00003
VT2006
460132
C847
233
9980939910
A2LA
100789
1461.01
P330-15-00234
Pace National has sixty-four client support centers that provide sample pickup and/or the delivery of sampling supplies. If you would like assistance from one of our support offices, please contact
our main office. Pace National performs all testing at our central laboratory.
WA
ME
MT NO
OR MN
T ID t WI NY
SD
WY MI
NV
t NE IA OH PA
T f IL Ills WV
vA
UT T
CA�� T
KS MO KY
N
NM O� AR SC
T MS AL`7GA
T TX * LA
T
AK
q FL
wo HI
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:
AECOM - Raleigh, NC 60628609 L1228253 06/22/20 11:07 23 of 25

,"Parry Name/Address: Billing Information:
Analysis/Container/Preservative
Chain of Custody Page 1 off
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1600 Perimeter Park Drive STE 400
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NationalPace Analytical • • . Innovation
Cooler Receipt F•
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Receipt Check List NP
Yes
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COC Seal Present / Intact?
COC Signed / Accurate?
Bottles arrive intact?
Correct bottles used?
Sufficient volume sent?
If Applicable;,
VOA Zero headspace?
Preservation Correct / Checked?

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
August 18, 2020
Nick Shore
AECOM-Morrisville NC
1600 Perimeter Park Drive
Morrisville, NC 27560
Project Location: 201 S. Estes Dr, Chapel Hill, NC
Client Job Number:
Project Number: 60628609
Laboratory Work Order Number: 20HO614
Enclosed are results of analyses for samples received by the laboratory on August 11, 2020. If you have any questions
concerning this report, please feel free to contact me.
Sincerely,
I,&, �. A��
Kerry K. McGee
Project Manager
QA Officer
Katherine Allen
Laboratory Manager
Daren Damboragian
Page 1 of 18

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
AECOM-Morrisville NC REPORT DATE: 8/18/2020
1600 Perimeter Park Drive
Morrisville, NC 27560 PURCHASE ORDER NUMBER: 60628609
ATTN: Nick Shore
PROJECT NUMBER: 60628609
ANALYTICAL SUMMARY
WORK ORDER NUMBER: 20HO614
The results of analyses performed on the following samples submitted to the CON -TEST Analytical Laboratory are found in this report.
PROJECT LOCATION: 201 S. Estes Dr, Chapel Hill, NC
FIELD SAMPLE # LAB ID: MATRIX SAMPLE DESCRIPTION TEST SUB LAB
SV-5
20HO614-01
Soil Gas
EPATO-15
SV-9
20HO614-02
Soil Gas
EPATO-15
SV-7
20HO614-03
Soil Gas
EPATO-15
SV-8
20HO614-04
Soil Gas
EPA TO-15
SV-6RR
20HO614-05
Soil Gas
EPATO-15
Page 2 of 18

icon-tes w .
ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CASE NARRATIVE SUMMARY
All reported results are within defined laboratory quality control objectives unless listed below or otherwise qualified in this report.
EPA TO-15
Qualifications:
Elevated reporting limit due to high concentration of target compounds.
Analyte & Samples(s) Qualified:
20HO614-01[SV-5], 20H0614-05[SV-6RR]
Elevated reporting limit due to matrix interference.
Analyte & Samples(s) Qualified:
20H0614-02[SV-9], 20HO614-03[SV-7], 20H0614-04[SV-8]
The results of analyses reported only relate to samples submitted to the Con -Test Analytical Laboratory for testing.
I certify that the analyses listed above, unless specifically listed as subcontracted, if any, were performed under my direction according to the approved methodologies listed
in this document, and that based upon my inquiry of those individuals immediately responsible for obtaining the information, the material contained in this report is, to the
best of my knowledge and belief, accurate and complete.
d�
Lisa A. Worthington
Technical Representative
Page 3 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
Project Location: 201 S. Estes Dr, Chapel Hill, NC
Date Received: 8/11/2020
Field Sample #: SV-5
Sample ID: 20HO614-01
Sample Matrix: Soil Gas
Sampled: 8/ 10/2020 14:56
ANALYTICAL RESULTS
Sample Description/Location:
Sub Description/Location:
Canister ID: 1940
Canister Size: 6 liter
Flow Controller ID: 4073
Sample Type: 30 min
Work Order: 20HO614
Initial Vacuum(in Hg): -29.5
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -7.3
Flow Controller Type: Fixed -Orifice
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
Sample Flags: RL-I I
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual Results
RL
MDL
Dilution
Analyzed
Analyst
cis-1,2-Dichloroethylene
350
15
5.1
1400
59
20
300
8/18/20 11:20
TPH
trans-1,2-Dichloroethylene
34
15
4.4
140
59
18
300
8/18/20 11:20
TPH
Tetrachloroethylene
6600
15
4.9
45000
100
33
300
8/18/20 11:20
TPH
Trichloroethylene
1300
15
5.6
7000
81
30
300
8/18/20 11:20
TPH
Vinyl Chloride
ND
15
8.4
ND
38
21
300
8/18/20 11:20
TPH
Surrogates
4-Bromofluorobenzene (1)
% Recovery
114
% REC Limits
70-130
8/18/20 11:20
Page 4 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: 201 S. Estes Dr, Chapel Hill, NC
Sample Description/Location:
Work Order: 20HO614
Date Received: 8/11/2020
Sub Description/Location:
Initial Vacuum(in Hg): -30
Field Sample #: SV-9
Canister ID: 1179
Final Vacuum(in Hg): -6.5
Sample ID: 20HO614-02
Canister Size: 6 liter
Receipt Vacuum(in Hg): -8.9
Sample Matrix: Soil Gas
Flow Controller ID: 4370
Flow Controller Type: Fixed -Orifice
Sampled: 8/10/2020 15:54
Sample Type: 30 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
Sample Flags: RL-12
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual Results
RL
MDL
Dilution
Analyzed
Analyst
cis-1,2-Dichloroethylene
ND
0.50
0.17
ND
2.0
0.67
10
8/18/20 9:15
TPH
trans-1,2-Dichloroethylene
ND
0.50
0.15
ND
2.0
0.59
10
8/18/20 9:15
TPH
Tetrachloroethylene
1.3
0.50
0.16
8.8
3.4
1.1
10
8/18/20 9:15
TPH
Trichloroethylene
0.33
0.50
0.18
J 1.8
2.7
0.99
10
8/18/20 9:15
TPH
Vinyl Chloride
ND
0.50
0.28
ND
1.3
0.71
10
8/18/20 9:15
TPH
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1) 115 70-130 8/18/20 9:15
Page 5 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: 201 S. Estes Dr, Chapel Hill, NC
Sample Description/Location:
Work Order: 20HO614
Date Received: 8/11/2020
Sub Description/Location:
Initial Vacuum(in Hg): -28.5
Field Sample #: SV-7
Canister ID: 1955
Final Vacuum(in Hg): -6.5
Sample ID: 20HO614-03
Canister Size: 6 liter
Receipt Vacuum(in Hg): -9.4
Sample Matrix: Soil Gas
Flow Controller ID: 4283
Flow Controller Type: Fixed -Orifice
Sampled: 8/10/2020 16:30
Sample Type: 30 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
Sample Flags: RL-12
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual Results
RL
MDL
Dilution
Analyzed
Analyst
cis-1,2-Dichloroethylene
ND
0.50
0.17
ND
2.0
0.67
10
8/18/20 9:40
TPH
trans-1,2-Dichloroethylene
ND
0.50
0.15
ND
2.0
0.59
10
8/18/20 9:40
TPH
Tetrachloroethylene
0.92
0.50
0.16
6.2
3.4
1.1
10
8/18/20 9:40
TPH
Trichloroethylene
ND
0.50
0.18
ND
2.7
0.99
10
8/18/20 9:40
TPH
Vinyl Chloride
ND
0.50
0.28
ND
1.3
0.71
10
8/18/20 9:40
TPH
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1) 115 70-130 8/18/20 9:40
Page 6 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: 201 S. Estes Dr, Chapel Hill, NC
Sample Description/Location:
Work Order: 20HO614
Date Received: 8/11/2020
Sub Description/Location:
Initial Vacuum(in Hg): -29.5
Field Sample #: SV-8
Canister ID: 1929
Final Vacuum(in Hg): -5
Sample ID: 20HO614-04
Canister Size: 6 liter
Receipt Vacuum(in Hg): -7.1
Sample Matrix: Soil Gas
Flow Controller ID: 4369
Flow Controller Type: Fixed -Orifice
Sampled: 8/10/2020 16:33
Sample Type: 30 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
Sample Flags: RL-12
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual Results
RL
MDL
Dilution
Analyzed
Analyst
cis-1,2-Dichloroethylene
ND
0.50
0.17
ND
2.0
0.67
10
8/18/20 10:05
TPH
trans-1,2-Dichloroethylene
ND
0.50
0.15
ND
2.0
0.59
10
8/18/20 10:05
TPH
Tetrachloroethylene
ND
0.50
0.16
ND
3.4
1.1
10
8/18/20 10:05
TPH
Trichloroethylene
ND
0.50
0.18
ND
2.7
0.99
10
8/18/20 10:05
TPH
Vinyl Chloride
ND
0.50
0.28
ND
1.3
0.71
10
8/18/20 10:05
TPH
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1) 111 70-130 8/18/20 10:05
Page 7 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
ANALYTICAL RESULTS
Project Location: 201 S. Estes Dr, Chapel Hill, NC
Sample Description/Location:
Work Order: 20HO614
Date Received: 8/11/2020
Sub Description/Location:
Initial Vacuum(in Hg): -28.5
Field Sample #: SV-6RR
Canister ID: 1952
Final Vacuum(in Hg): -3.5
Sample ID: 20HO614-05
Canister Size: 6 liter
Receipt Vacuum(in Hg): -5.7
Sample Matrix: Soil Gas
Flow Controller ID: 4211
Flow Controller Type: Fixed -Orifice
Sampled: 8/10/2020 14:58
Sample Type: 30 min
Flow Controller Calibration
RPD Pre and Post -Sampling:
EPA TO-15
Sample Flags: RL-11
ppbv
ug/m3
Date/Time
Analyte
Results
RL
MDL
Flag/Qual Results
RL
MDL
Dilution
Analyzed
Analyst
cis-1,2-Dichloroethylene
3.8
1.5
0.51
15
5.9
2.0
30
8/18/20 10:29
TPH
trans-1,2-Dichloroethylene
3.7
1.5
0.44
15
5.9
1.8
30
8/18/20 10:29
TPH
Tetrachloroethylene
1400
1.5
0.49
9800
10
3.3
30
8/18/20 10:29
TPH
Trichloroethylene
66
1.5
0.56
350
8.1
3.0
30
8/18/20 10:29
TPH
Vinyl Chloride
ND
1.5
0.84
ND
3.8
2.1
30
8/18/20 10:29
TPH
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1) 115 70-130 8/18/20 10:29
Page 8 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
Sample Extraction Data
Prep Method: TO-15 Prep -EPA TO-15
Pre-Dil
Pre-Dil
Default
Actual
Pressure Pre Initial
Final
Injection
Injection
Lab Number [Field ID]
Batch
Dilution Dilution mL
mL
mL
mL
Date
20HO614-01 [SV-5]
B264623
1.5 200 5
1000
200
200
08/17/20
20HO614-02 [SV-9]
B264623
1.5 1 N/A
1000
200
30
08/17/20
20HO614-03 [SV-7]
B264623
1.5 1 N/A
1000
200
30
08/17/20
20HO614-04 [SV-8]
B264623
1.5 1 N/A
1000
200
30
08/17/20
20HO614-05 [SV-6RR]
B264623
1.5 1 N/A
1000
200
10
08/17/20
Page 9 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
QUALITY CONTROL
Air Toxics by EPA Compendium Methods - Quality Control
ppbv ug/m3 Spike Level Source %REC RPD
Analyte Results RL Results RL ppbv Result %REC Limits RPD Limit Flag/Qual
Batch B264623 - TO-15 Prep
Blank (B264623-BLK1)
Prepared & Analyzed: 08/17/20
cis-1,2-Dichloroethylene
ND
0.020
trans-1,2-Dichloroethylene
ND
0.020
Tetrachloroethylene
ND
0.020
Trichloroethylene
ND
0.020
Vinyl Chloride
ND
0.020
Surrogate: 4-Bromofluorobenzene (1)
LCS (B264623-BS1)
9.29
8.00 116
Prepared & Analyzed: 08/17/20
70-130
cis-1,2-Dichloroethylene
5.36
5.00 107
70-130
trans-1,2-Dichloroethylene
5.40
5.00 108
70-130
Tetrachloroethylene
5.48
5.00 110
70-130
Trichloroethylene
4.84
5.00 96.9
70-130
Vinyl Chloride
5.09
5.00 102
70-130
Surrogate: 4-Bromofluorobenzene (1) 9.31 8.00 116 70-130
Page 10 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
Note: Blank Subtraction is not performed unless otherwise noted
FLAG/QUALIFIER SUMMARY
*
QC result is outside of established limits.
t
Wide recovery limits established for difficult compound.
$
Wide RPD limits established for difficult compound.
#
Data exceeded client recommended or regulatory level
RL
Reporting Limit
MDL
Method Detection Limit
RPD
Relative Percent Difference
LCS
Laboratory Control Sample
LCS Dup
Duplicate Laboratory Control Sample
MS
Matrix Spike Sample
MS Dup
Duplicate Matrix Spike Sample
REC
Recovery
QC
Quality Control
ppbv
Parts per billion volume
EPA
United States Environmental Protection Agency
% REC Percent Recovery
ND Not Detected
N/A Not Applicable
DL Detection Limit
NC Not Calculated
LFB/LCS Lab Fortified Blank/Lab Control Sample
ORP Oxidation -Reduction Potential
wet Not dry weight corrected
% wt Percent weight
Kg Kilogram
g Gram
mg Milligram
µg Microgram
ng Nanogram
L Liter
mL Milliliter
µL Microliter
m3 Cubic Meter
EPH Extractable Petroleum Hydrocarbons
VPH Volatile Petroleum Hydrocarbons
APH Air Petroleum Hydrocarbons
FID Flame Ionization Detector
PID Photo Ionization Detector
Percent recoveries and relative percent differences (RPDs) are determined by the software using values in the
calculation which have not been rounded.
J Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated
concentration (CLP J-Flag).
RL-11 Elevated reporting limit due to high concentration of target compounds.
RL-12 Elevated reporting limit due to matrix interference.
ANALYST
TPH Thomas P. Hnitecki
RAP Raisa A. Petraitis
KKM Kerry K. McGee
Page 11 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area o/
Limits
RT Diff
RT Diff
Limit
Q
Initial Cal Check (S050383-ICV1) Lab File ID: J2020121.13 Analyzed: 07/19/20 19:25
Bromochloromethane (1)
192898
2.879
193615
2.876
100
60 - 140
0.0030
+/-0.50
1,4-Difluorobenzene(1)
923399
3.481
929583
3.478
99
60-140
0.0030
+/-0.50
Chlorobenzene-d5(1)
813486
5.06
821357
5.06
99
60-140
0.0000
+/-0.50
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area o/
Limits
RT Diff
RT Diff
Limit
Q
Calibration Check (S051436-CCVI) Lab File ID: J2023004.13 Analyzed: 08/17/20 14:14
Bromochloromethane (1)
123528
2.876
193615
2.876
64
60 - 140
0.0000
+/-0.50
1,4-Difluorobenzene(1)
710618
3.478
929583
3.478
76
60-140
0.0000
+/-0.50
Chlorobenzene-d5(1)
639151
5.06
821357
5.06
78
60-140
0.0000
+/-0.50
LCS (B264623-BS1 ) Lab File ID: J2023006.13 Analyzed: 08/17/20 15:44
Bromochloromethane (1)
123746
2.879
123528
2.876
100
60 - 140
0.0030
+/-0.50
1,4-Difluorobenzene(1)
705969
3.481
710618
3.478
99
60-140
0.0030
+/-0.50
Chlorobenzene-d5(1)
644075
5.06
639151
5.06
101
60-140
0.0000
+/-0.50
Blank (B264623-BLK1) Lab File ID: J2023009.13 Analyzed: 08/17/20 17:12
Bromochloromethane (1)
128482
2.867
123528
2.876
104
60 - 140
-0.0090
+/-0.50
1,4-Difluorobenzene(1)
726345
3.472
710618
3.478
102
60-140
-0.0060
+/-0.50
Chlorobenzene-d5(1)
637813
5.057
639151
5.06
100
60-140
-0.0030
+/-0.50
SV-9 (20110614-02 ) Lab File ID: J2023025.13 Analyzed: 08/18/20 09:15
Bromochloromethane (1)
120931
2.866
123528
2.876
98
60 - 140
-0.0100
+/-0.50
1,4-Difluorobenzene(1)
715656
3.487
710618
3.478
101
60-140
0.0090
+/-0.50
Chlorobenzene-d5(1)
686022
5.063
639151
5.06
107
60-140
0.0030
+/-0.50
SV-7 (20110614-03 ) Lab File ID: J2023026.13 Analyzed: 08/18/20 09:40
Bromochloromethane (1)
123172
2.867
123528
2.876
100
60 - 140
-0.0090
+/-0.50
1,4-Difluorobenzene(1)
679654
3.488
710618
3.478
96
60-140
0.0100
+/-0.50
Chlorobenzene-d5(1)
709583
5.063
639151
5.06
ill
60-140
0.0030
+/-0.50
SV-8 (20110614-04 ) Lab File ID: J2023027.D Analyzed: 08/18/20 10:05
Bromochloromethane (1)
117348
2.866
123528
2.876
95
60 - 140
-0.0100
+/-0.50
1,4-Difluorobenzene(1)
472744
3.497
710618
3.478
67
60-140
0.0190
+/-0.50
Chlorobenzene-d5(1)
702160
5.063
639151
5.06
110
60-140
0.0030
+/-0.50
SV-6RR (20110614-05) Lab File ID: J2023028.D Analyzed: 08/18/20 10:29
Bromochloromethane (1)
123286
2.873
123528
2.876
100
60 - 140
-0.0030
+/-0.50
1,4-Difluorobenzene(1)
750995
3.481
710618
3.478
106
60-140
0.0030
+/-0.50
Chlorobenzene-d5(1)
675765
5.06
639151
5.06
106
60-140
0.0000
+/-0.50
Page 12 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
INTERNAL STANDARD AREAAND RT SUMMARY
EPA TO-15
Internal Standard
Response
RT
Reference
Response
Reference
RT
Area %
Area %
Limits
RT Diff
RT Diff
Limit
Q
SV-5 (20110614-01) Lab File ID: J2023030.D Analyzed: 08/18/20 11:20
Bromochloromethane (1)
125685
2.87
123528
2.876
102
60 - 140
-0.0060
+/-0.50
1,4-Difluorobenzene(1)
727158
3.475
710618
3.478
102
60-140
-0.0030
+/-0.50
Chlorobenzene-d5(1)
651794
5.057
639151
5.06
102
60-140
-0.0030
+/-0.50
Page 13 of 18

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ANALYTICAL LABORATORY
39 Spruce Street' East Longmeadow, MA 01028 ` FAX [phone] " TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S051436-CCV 1
COMPOUND
TYPE
CONC. (ppbv)
RESPONSE FACTOR
% DIFF / DRIFT
STD
CCV
ICAL
CCV
MIN (#)
CCV
LIMIT (#)
cis-1,2-Dichloroethylene
A
5.00
5.44
1.019309
1.108516
8.8
30
trans-1,2-Dichloroethylene
A
5.00
5.53
1.070052
1.183214
10.6
30
Tetrachloroethylene
A
5.00
5.67
0.5030711
0.5705469
13.4
30
Trichloroethylene
A
5.00
4.92
0.2707074
0.2664227
-1.6
30
Vinyl Chloride
A
5.00
5.23
0.7639505
0.7994171
4.6
30
# Column to be used to flag Response Factor and %Diff/Drift values with an asterisk
* Values outside of QC limits
Page 14 of 18

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ANALYTICAL LABORATORY
39 Spruce Street ` East Longmeadow, MA 01028 ' FAX [phone] " TEL. [phone]
CERTIFICATIONS
Certified Analyses included in this Report
Analyte
Certifications
EPA TO-15 in Air
cis-1,2-Dichloroethylene
AIHA,FL,NY,ME,NH,VA
trans-1,2-Dichloroethylene AIHA,NJ,NY,ME,NH,VA
Tetrachloroethylene
AIHA,FL,NJ,NYM E,NH,VA
Trichloroethylene
AIHA,FL,NJ,NY,ME,NH,VA
Vinyl Chloride
AIHA,FL,NJ,NY,ME,NH,VA
The CON -TEST Environmental
Laboratory operates under the following certifications and accreditations:
Code
Description
Number
Expires
AIHA
AIHA-LAP, LLC - ISO17025:2017
100033
03/l/2022
MA
Massachusetts DEP
M-MA100
06/30/2021
CT
Connecticut Department of Publilc Health
PH-0567
09/30/2021
NY
New York State Department of Health
10899 NELAP
04/1/2021
NH-S
New Hampshire Environmental Lab
2516 NELAP
02/5/2021
RI
Rhode Island Department of Health
LA000112
12/30/2020
NC
North Carolina Div. of Water Quality
652
12/31/2020
NJ
New Jersey DEP
MA007 NELAP
06/30/2021
FL
Florida Department of Health
E871027 NELAP
06/30/2021
VT
Vermont Department of Health Lead Laboratory
LL015036
07/30/2021
ME
State of Maine
2011028
06/9/2021
VA
Commonwealth of Virginia
460217
12/14/2020
NH-P
New Hampshire Environmental Lab
2557 NELAP
09/6/2020
VT-DW
Vermont Department of Health Drinking Water
VT-255716
06/12/2021
NC-DW
North Carolina Department of Health
25703
07/31/2021
PA
Commonwealth of Pennsylvania DEP
68-05812
06/30/2021
MI
Dept. of Env, Great Lakes, and Energy
9100
10/1/2020
Page 15 of 18

8/14/2020
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149454204841
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TRACKING NUMBER SHIPPER CITY, STATE SHIP DATE STATUS DELIVERY DATE DESTINATION/RECIPIENT
`.:CITY, STATE
1494Z4204841 DURHAM, NC V 1/202c 8/13i2D20 East Lcnymeadov, IVA
(master 1
149454204852 f.1URi i/ V. NC
Shipment Facts
TRACKING NUMBER
91542048 {1
WEIGHT
TOTAL SHIPMENT WEIGHT
3O 11.,si 13,�1 kg,--
STANDARD TRANSIT
8 �I'2.02U
E/13i2020 MA
SERVICE
MASTER TRACKING NUMBER
I ec,Ex Ground
i 12 4i5-.2t4841
DIMENSIONS
TOTALL PIECES
I xiOx10irt
2
TERMS
PACKAGING '
1 hird Parly
Pa( kage
SHIP DATE
ACTUAL DELIVERY
0
! u 8/'1 =12020 4 40 � m
.;.UE'F'i11/?020
https:l/www.fedex,comiapps/fedextrack/?action=track&tracknumbers=149454204841Mocale=en_US&cntry_code=us Page 17 of 18

U
C: C:0 n MW tC
=!StaD...
I Have Not Confirmed Sample Container
Numbers With Lab Staff Before
Relinquishing Over ANALL-V-� C� AA. — I-Aa MC3 AL-rC3FlY
Samples
'Doc#:278 .Rein 6 2017
Air Media Sample Receipt Checklist - (Rejection Criteria Listing - Using Acceptance Policy) Any false
�Statement will be brought to the attention of the Client - State True or False
+` Client vl �[ r-v E ►
Received By hf�—? Date 0 I '� 1;�-O Time
How were the samples In Cooler On lee No Ice
received? In Box T" Ambient Melted Ice
Were samples within Temperature By Gun # Actual Temp -
Compliance? 2-6°C By Blank # Actual Temp Was Custody Seal Intact? Were Samples Tampered with?
Was COC Relinquished ? �� Does Chain Agree With Samples?
Are there any loose caps/valves on any samples?
Is COC in ink/ Legible?
Did COC Include all Client Analysis I Sampler Name
Pertinent Information? Project
Are Sample Labels filled out and legible?
Are there Rushes? V--
Samples are received within holding time?
Proper Media Used?
Are there Trip Blanks? --
.............
ID's t Collection Dates/Times r1
1
Who was notified?
Individually Certified Cans?
Is there enough Volume.?:.
Page 18 of 18 1

ATTACHMENT 16
DSCA PROGRAM RISK CALCULATORS

DSCA Soil Gas Risk Calculator - Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/11/2020
Sample ID: SV-5
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
All concentrations are in ue/m;
Indoor AirCalculated
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Non -
CAS #
Chemical Name:
Concentration
Air Concentration
Concentration
Level
for Non -
Calculated
Carcinogenic
a
a
for Carcinogens
Carcinogens @
Carcinogenic Risk
Hazard
@ TCR =1 E-06
Quotient
156-59-2
Dichloroeth lene, 1,2-cis-
1400
14
156-60-5
Dichloroet lene, 1,2-trans-
140
1.4
127-18-4
Tetrachloroeth lene
45000
450
4.7E+01
3.5E+01
9.5E-06
2.6E+00
79-01-46
Trichloroeth lene
000
70
1.8E0
2.3E-OS
0E+00
75-01-
1 Chloride
2.8+0
E+Vin 1
Cumulative: I 3.3E-05 I LIE+01

DSCA Soil Gas Risk Calculator - Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/1112020
Sample ID: SV-6rr
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
411 _... rt ,bone are in no/m3
Indoor Air
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Calculated Non -
CAS #
Chem
Chemical Name:
Concentration
Air Concentration
Screening Level
for Non-
Calculated
Carcinogenic
(ug/rn)
(uP/rn)
for Carcinogens @
Carcinogens @
Carcinogenic Risk
Hazard Quotient
TCR 1E06
THQ = 0.2
156-59-2
Dichloroethylene, 1,2-cis-
15
0.15
156-60-5
Dichloroethylene, 1,2-trans-
15
0.15
127-18-4
Tetrachloroethylene
9800
98
4.7E+01
3.5E+01
2.1E-06
5.6E-01
79-01-6
Trichloroethylene
350
3.5
3.0E+00
1.8E+00
1.2E-06
4.0E-Ol
75-01-4
Vinyl Chloride
I 2.8E+00
8.8E+01
Cumulative: I 3.2E-06 I 9.6E-01

DSCA Soil Gas Risk Calculator - Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/1112020
Sample ID: SV-7
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
411 _... rt ,bone are in no/m3
Indoor Air
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Calculated Non -
CAS #
Chem
Chemical Name:
Concentration
Air Concentration
Screening Level
for Non-
Calculated
Carcinogenic
(uP/rn)
for Carcinogens @
Carcinogens @
Carcinogenic Risk
Hazard Quotient
TCR 1E06
THQ = 0.2
156-59-2
Dichloroethylene, 1,2-cis-
156-60-5
Dichloroethylene, 1,2-trans-
127-18-4
Tetrachloroethylene
6.2
0.062
i 4.7E+01
3.5E+01
1.3E-09
3.5E-04
79-01-6
ITrlchloroethylene
3.0E+00
1.8E+00
75-01-4
Vinyl Chloride
2.8E+00
I 8.8E+01
Cumulative: I 1.3E-09 I 3.5E-04

DSCA Soil Gas Risk Calculator - Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/1112020
Sample ID: SV-9
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
411 _... rt ,bone are in no/m3
Indoor Air
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Calculated Non -
CAS #
Chem
Chemical Name:
Concentration
Air Concentration
Screening Level
for Non-
Calculated
Carcinogenic
(ug/rn)
(uP/rn)
for Carcinogens @
Carcinogens @
Carcinogenic Risk
Hazard Quotient
TCR 1E06
THQ = 0.2
156-59-2
Dichloroethylene, 1,2-cis-
156-60-5
Dichloroethylene, l,2-trans-
127-18-4
Tetrachloroethylene
8.8
0.088
4.7E+01
3.5E+01
1.9E-09
5.0E-04
79-01-6
Trichloroethylene
1.8
0.018
3.0E+00
1.8E+00
6.0E-09
2.1E-03
75-01-4
Vinyl Chloride
2.8E+00
I 8.8E+01
Cumulative: I 7.9E-09 I 2.6E-03

DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/11/2020
Sample ID: SV-5
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
M concentrations are in ue/m'
Indoor Air
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Calculated Non -
CAS #
Chemical Name:
Concentration
Air Concentration
Screening Level
for Non-
Calculated
Carcinogenic
(ug/,n)
(ug/m3)
for Carcinogens
Carcinogens @
Carcinogenic Risk
Hazard
@ TCR = I E-06
TH — 0 2
Quotient
156-59-2
Dichloroet lene, 1,2-cis-
1400
42
156-60-5
Dichloroeth lene, 1,2-trans-
140
4.2
127-18-4
Tetrachloroeth lene
45000
1350
1.1E+01
8.3E+00
1.3E-04
3.2E+01
79-011
Trichloroeth lene
700
21
4.8E-Ol
4.2E-01
4.4E-01
1.0E+01
75-01-4
Vin lChloride
1.7E-Ol
2.1E+01
Cumulative: I 1.7E-04 I 4.2E+01

DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/1112020
Sample ID: SV-6rr
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
All rnnrenirarinnc are m no/m3
Indoor An
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Calculated Non -
CAS #
Chemical Name:
Concentration
Air Concentration
Screening Level
for Non-
Calculated
Carcinogenic
s
(ug/m)
s
(ug/m)
for Carcinogens @
Carcinogens @
Carcinogenic Risk
Hazard Quotient
TCR= 1E-06
THQ = 0.2
156-59-2
Dichloroethylene, 1,2-cis-
15
0.45
156-60-5
Dichloroethylene, 1,2-trans-
15
0.45
127-18-4
Tetrachloroethylene
9800
294
1.1E+01
8.3E+00
2.7E-05
7.0E+00
79-01-6
Trichloroethylene
350
10.5
4.8E-Ol
4.2E-01
2.2E-05
5.0E+00
75-01-4
Vinyl Chloride
I 1.7E-01
2.1E+01
Cumulative: I 4.9E-05 I 1.2E+01

DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/1112020
Sample ID: SV-7
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
All rnnrenirarinnc are m no/m3
Indoor An
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Calculated Non -
CAS #
Chemical Name:
Concentration
Air Concentration
Screening Level
for Non-
Calculated
Carcinogenic
s
(ug/m)
;
(ug/m)
for Carcinogens @
Carcinogens @
Carcinogenic Risk
Hazard Quotient
TCR=1E-06
THQ — 0.2
156-59-2
Dichloroethylene, 1,2-cis-
156-60-5
Dichloroethylene, 1,2-trans-
127-18-4
Tetrachloroethylene
6.2
0.186
1.1E+01
8.3E+00
1.7E-08
4.5E-03
79-01-6
Trichloroethylene
4.8E-01
4.2E-01
75-01-4
Vinyl Chloride
1.7E-01
I 2.1E+01
Cumulative: I 1.7E-09 I 4.5E-03

DSCA Soil Gas Risk Calculator - Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 8/1112020
Sample ID: SV-9
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk
values are calculated for these chemicals.
All rnnrenirarinnc are m no/m3
Indoor An
Soil Gas
Calculated Indoor
Indoor Air
Screening Level
Calculated Non -
CAS #
Chemical Name:
Concentration
Air Concentration
Screening Level
for Non-
Calculated
Carcinogenic
s
(ug/m)
;
(ug/m)
for Carcinogens @
Carcinogens @
Carcinogenic Risk
Hazard Quotient
TCR=1E-06
THQ — 0.2
156-59-2
Dichloroethylene, 1,2-cis-
156-60-5
Dichloroethylene, 1,2-trans-
127-18-4
Tetrachloroethylene
8.8
0.264
1.1E I
8.3E+00
2.4E-08
6.3E-03
79-01-6
Trichloroethylene
1.8
0.054
4.8E-01
4.2E-01
LIE-07
2.6E-02
75-01-4
Vinyl Chloride
1.7E-01
I 2.1E+01
Cumulative: I 1.4E-07 I 3.2E-02

DSCA Indoor Air Risk Calculator- Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleanem, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Omnge County, North Carolina
Sampling Date: 6/10/2020
Sample ID: MW-1
Average Groundwater Temperature ("C): 25 (Use de/autt of 25°C unless sits -specific data is available confimung Me groundwater temperetum during—stcass summercordilions.)
Carcinogenic risk and hazard quotient cells highlighted In orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor Intrusion risk, no risk values are calculated forthese chemicals.
Henry's Constant
l
Indoor An
ndom_Idoor Av
CalculatedNon-
CAS#
Chemical Name:
Groundwater
Concentration
Henrys Constant
a[25°
used f
Air Culated
atim,
Afr Concentratros
Screening Level
Screening Level
fmNon-
Calculated
Carcinogenic
(ug/L)
(dnnensiovle 9)
calculations
(ugm�
for Carcinogens
C ®
Carcvtogenic Risk
Hazard
( ensiovless)
® TCR=1E-06
HQ 0
TH =0.2
Qvotievt
156-59-2
Dkhloroeth Irne, 1,2cis-
0.141
0.166802944
0.166802944
0.023519215
156-60-5
Dkhloroeth Irne, 1,2-trans-
0.383483238
0.383483238
127.18-0
Temchloroeth lene
0.738
0.723630417
0.723630417
0.534039248
4.7E+01
3.5E+01
1.1E-08
3.0E-03
79-01.6
Trichloroeth lene
0.442
0.402698283
0.402698283
0.177992641
3.0E+00
1.8E+00
6.0E-08
2.0E-02
75-014
Vinyl Chlorido
1.136549469
1.136549469
2.8E+00
8.8E+01
Cumulative: I 7.1E-08 I 2.3E-02

DSCA Indoor Air Risk Calculator -Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: MW-8
Average Groundwater Temperature(oC): 25 (Use defeuttof25°C unless siteseecirc data is available confimung the ground-terlemp-tun, dung worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Indoor Aa
Groundwater
Henrys Constant
Henrys Constant
C.1culated Indoor
indoor Av
S-.ing Level
CalculatedNon-
CASp
Chemical Name:
Con(ug/L) os
at25°
used f
Air Concentration
Screening Level
for
fm Non-
Calculated
Risk
Carchrogenic
(uglL)
(dimensiovlesa)
cakulatiovs
(apJma)
Carcinogens
Carcvtogens @
Carcinogenic
Hazard Quotient
(dnnensionless)
@TCR=1E-06
THO-02
75-354
Dichloroethvl-1,1-
0.241
L067048242
1.067048242
0.257158626
1.8E+02
2.9E-04
156-59-2
Dichlerecd lene. 1.2cis-
144
0.166802944
0.166802944
24.01962388
156-00.5
Dichloroethvlene, 1.2-trans-
1.53
0.383483238
0.383483238
0.586729354
127-184
Tetrachlomethvkoe
365
0.723630417
0.723630417
264.1251022
4.7E+01
3.5E+01
5.6E-06
1.5E+00
76-13.1
Trichloro-1,2,2-u luoroethane, 1,1,2-
1.55
21.50449714
21.50449714
33.33197056
4.4E+03
1.5E-03
79-01-6
Trichlom thvleoe
79.2
0.402698283
0.40269TI 19
31.89370401
3.0E+00
1.8E+00
I-05
N.29
3.6E+00
75-014
Vinyl Chloride
3.58
1.136549469
1.136549469
4.068847097
2.8E+00
8.8E11
1.5E-06
9.3E-03
Cumulative: I 1.8E-05 5.2E+00

DSCA Indoor Air Risk Calculator -Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: MW5
Average Groundwater Temperature(oC): 25 (Use de/euttof25°C unless siteseecirc data is available confimung the ground-terleee—tun, dung worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do no[ pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Indoor Aa
Growdwater
Henrys Constant
Henrys Constant
C.1culated Indoor
indoor Av
Screening Level
CalculatedNon-
CASp
Chemical Name:
Con(ug/L) os
at25°
used f
Air Concentration
Screening Level
for
fm Non-
Calculated
Risk
Carchrogenic
(uglL)
(dimensiovlesa)
cakulatiovs
(u�ms)
Carcinogens
Care. ogees @
Carcinogenic
Hazard Quotient
(dnnensionless)
@TCR=1E-06
THO-02
156-59.2
Dichloroethvlene, I.Uis-
0.228
0.166802944
0.166802944
0.038031071
156-60-5
Dichlerecd lene. 1.2-tress-
0.383493239
0.393483238
127-18-4
Teuachloroethvlene
0.723630417
0.723630417
4.7E+01
3.5E+01
79-01-6
Trichlom thvleoe
0.402698283
0.402698283
3.0E+00
1.8E+00
75-01-4
Vinyl Chloride
1.136549469
1.136549469
2.8E+00
8.8E+01
Cumulative: I 0.0E+00 0.0E+00

DSCA Indoor Air Risk Calculator -Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: 2W-10
Average Groundwater Temperature(oC): 25 (Use de/euttof25°C unless siteseecirc data is available confimung the ground-terleee-tun, dung worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do no[ pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Indoor Aa
Growdwater
Henrys Constant
Henrys Constant
C.1culated Indoor
indoor Av
S-.ing Level
CalculatedNon-
CASp
Chemical Name:
Con(ug/L) os
at25°
used f
Air Concentration
Screening Level
for
fm Non-
Calculated
Risk
Carchrogenic
(uglL)
(dimensiovlesa)
cakulatiovs
(apJm')
Carcinogens
Carc. ogees @
Carcinogenic
Hazard Quotient
(dnnensionless)
@TCR=1E-06
THO-02
156-59.2
Dichloroethvlen0.1.Uis-
101
0.166802944
0.166802944
16.9470973
156-60-5
Dichlerecd lene. 1.2-tress-
0.473
0.383493239
0.393483238
0.191387572
127-18-4
Teuachloroethvlene
18
0.723630417
0.723630417
13.02534751
4.7E+01
3.5E+01
2.8E-07
7.4E-02
79-01-6
Trichlom thvleoe
36.5
0.402698283
0.402698283
14.69948733
3.0E+00
1.8E+00
4.9E-06
1.7E+00
75-01-4
Vinyl Chloride
2.2
1.136549469
1.136549469
2.500408831
2.8E+00
8.8E+01
9.0E-07
5.7E-03
Cumulative: I 6.1E-06 1.8E+00

DSCA Indoor Air Risk Calculator -Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: 2W-11
Average Groundwater Temperature(oC): 25 (Use default of25° C unless siteseecirc data is available confimung the ground-terleee-tun, dung worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do no[ pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Indoor Aa
Growdwater
Henrys Constant
Henrys Constant
C.1culated Indoor
indoor Av
S-.ing Level
CalculatedNon-
CASp
Chemical Name:
Con(ug/L) os
at25°
used f
Air Concentration
Screening Level
for
fm Non-
Calculated
Risk
Carchrogenic
(uglL)
(dimensiovlesa)
cakulatiovs
(apJm')
Carcinogens
Carc. ogees @
Carcinogenic
Hazard Quotient
(dnnensionless)
@TCR=1E-06
THO-02
156-59.2
Dichloroethvlen0.1.Uis-
67.9
0.166802944
0.166802944
11.32591987
156-60-5
Dichlerecd lane. 1.2-tress-
0.292
0.383493239
0.393483238
0.111977105
127-18-4
Teuachloroethvlene
11.4
0.723630417
0.723630417
8.249386754
4.7E+01
3.5E+01
1.7E-07
4.7E-02
79-01-6
Trichlom thvleoe
24.2
0.402698283
0.402698283
9.745298446
3.0E+00
1.8E+00
3.3E-06
1.1E+00
75-01-4
Vinyl Chloride
1.43
1.136549469
1.136549469
1.62526574
2.8E+00
8.8E+01
5.8E-07
3.7E-03
Cumulative: I 4.0E-06 1.2E+00

DSCA Indoor Air Risk Calculator -Cumulative Risk for Non -Residential Worker
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: 2W-12
Average Groundwater Temperature(oC): 25 (Use defeuttof25°C unless siteseecirc data is available confimung the ground-terlemp-tun, dung worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Indoor Aa
Groundwater
Hemy's Constant
Hemy's Constant
C.1culated Indoor
indoor Av
Screeting Level
CalculatedNon-
CASp
Chemical Name:
Concestrados
at25°
used f
Air Concenaalion
Screening Level
for
fm Non-
Calculated
Risk
Carchrogenic
(ugR.)
(dimensiovlesa)
cakulatiovs
(apJm')
Carcinogens
Care. ogees @
Carcinogenic
Hazard Quotient
(dnnensionless)
@TCR=1E-06
THO-02
67.66-3
Chloroform
0.147
0A50040883
0.150040883
0.02205601
5.3E-01
8.6E+01
4.1E-08
5.1E-05
75-354
Dichlom thvleoe. 1.1-
1.03
1.067048242
1.067048242
1.099059689
1.8E+02
1.3E-03
156-59-2
Dichloroethvlene, I.Uis-
799
0.166802944
0.166802944
133.2755519
156-60-5
Dichlerecd lene, 1.2-aaas-
5.31
0.383493239
0.393483238
2.036295993
127-184
Temchloroethvlene
1340
0.723630417
0.723630417
969.6647588
4.7E+01
3.5E+01
2.1E-05
5.5E+00
76-13-1
Tdchloro-1.2.2-.ifluoroethane, 1,12-
l.8
21,50449714
21.50449714
38.70809485
4.4E+03
1.8E-03
79-01-6
Trichloroethvleoe
22I,
0.402698283
0.402698283
91.8152085
3.0E+00
1.8E+00
3.1E-05
1.0E+01
75-014
1 Vinvl Chloride
1 1.136549469
1 1.136549469
1
1 2.8E+00
I 8.8E+01
Cumulative: I 5.1E-05 1.6E+01

DSCA Indoor Air Risk Calculator -Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Date: 6/10/2020
Sample ID: MW-1
Average Groundwater Temperature (°C): 25 (Use default of 25°C unless sih-pecTc data is available corfimung the groundwater h,,hh—tum during -,Vasa summer -onions.)
Carcinogen(, risk and hazard quotient cells highlighted In orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor Intrusion dsk, no risk values are calculated forthese chemicals.
Henry's Covstant
Calculated
Indoor Air
Indoor Av
CalculatedNon-
Groundwater
Henrys Constant
used f
Indoor Av
Scmening [,eve(
Screenvtg Level
Calculated
Caroinogenic
CAS#
Chemical Name:
Concevtratron
a[25°C
calculffiiovs
Concentration
for Carcinogens
forNon-
Carcinogenic Risk
Hazard
(ug/L)
(dvnevsiovle 9)
dira
(evsiovless)
@TCR=lEA6mo®
Qmaevt
(ap/mr)
TH =0.2
156-59-2
Dichloroeth Irne, 1,2cis-
0.141
0.166802944
0A66802944
0.023519215
156-60-5
Dichkha t, 1,2-tmna-
0.383483238
0.383483238
127-184
Teuschloroeth lene
0.738
0.723630417
0.723630417
0.534039248
1.1E+01
8.3E+00
4.9E-08
1.3E-02
79-01.6
Trichloroeth lene
0.442
0.402698283
0.402698283
0.177992641
4.8E-01
4.2E-01
3.7E-07
8.5E-02
75-01-4
Vinyl Chlondc
1.136549469
1.136549469
1.7E-01
2.1E+01
Cumvlati— I 4.2E-07 9.8E-02

DSCA Indoor Air Risk Calculator -Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: Amenean Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: MW-3
Average Groundwater Temperature(oC): 25 (Use de/euttef2VC unless sitespecirc data is available -firming the groundwatertemperature dung worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Henrys Constant
Cakulated
Indoor Afr
Indoor Aa
Groundwater
Henrys Constant
used for
Indoor A.
Screening Level
Screening Level
Calculated
CaleulatadNee-
CAS#
Chemical Name:
Covoevtmdov
at25°C
calc.ionls
Co(ug/reuov
for Carcinogens
for Nov-
Caroinogenic Risk
Carcinogenic
(ug/L)
(dimeneionlese)
(dvnensiovless)
(ug/m')
®TCR=18-06
CarHO-0. Q
THO = 0.2
Hazffid Quotievt
75-354
Dichloroethvlene. 1.1-
0.241
1.067048242
1.067048242
0.257158626
4.2E+01
1.2E-03
156-59.2
Dichloroethvlene. I.Uis-
144
0.166802944
0.166802944
24.01962388
156-60-5
Dichloroethvlene. 1.2-taus-
1.53
0.383483238
0.383483238
0.586729354
127-18-4
Teuachloroethvlene
365
0.723630417
0.723630417
264.1251022
IAE+01
8.3E+00
2.4E-05
6.3E+00
76-13-1
Thohloro-1.2.2-tofluoroethane. 1.1.2.
1.55
21.50449714
21.50449714
33.33197056
1.0E+03
6.4E-03
79-01-6
Trichloroethvlrne
79.2
0.402698283
0.402698212
31.89370401
4.8E-0l
4.2E-0l
6.7E-05
1.5E+01
7NO
Vint Chloride
3.58
1.136549469
1.136549469
4.068847097
1.7E-01
2.1E+01
2.4E-05
3.9E-02
Cumulative: I 1.2E-04 2.2E+01

DSCA Indoor Air Risk Calculator -Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: Amenean Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: MW5
Average Groundwater Temperature(oC): 25 (Use deWftof2VC unless sitespecirc data is available —firming the groundwatertemperature during worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Henrys Constant
Cakulated
Indoor Afr
Indoor
Groundwater
Henrys Constant
used for
Indoor A.
Screening Level
Screening Level
Calculated
CaloulatedNon-
CASq
Chemical Name:
Covicevtmdov
at25°C
calculations
Co(ug/m tiov
fm Carcinogens
for Non-
Carcinogenic Risk
Carcinogenic
(ug/L)
(dimensiovlese)
(dvnensiovless)
(ug/m')
®TCR=1E06
—Ai
Catch —0. Q
THO = 0.2
Hazard Quotient
156-59-2
Dichloroethvlene. 1.2cis-
0.228
0.166802944
0.166802944
0.038031071
156-60.5
Dichloroethvlene, 1.2-mans-
0.383483238
0.383483238
127-184
TemechlomethAene
0.723630417
0.723630417
1.1E+01
8.3E+00
79-01.6
Tnchl—thvlene
0.402698283
0.402698283
4.8E-01
4.2E-01
75-014
VinA Chloride
1.136549469
1.136549469
1.7E-01
2.1E+01
Cumulative: I 0.0E+00 0.0E+00

DSCA Indoor Air Risk Calculator -Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: Amenean Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: 2W-10
Average Groundwater Temperature(oC): 25 (Use deWftof2VC unless sitespecirc data is available -firming the groundrvalertemperature during worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Henrys Constant
Cakulated
Indoor Afr
Indoor
Groundwater
Henrys Constant
used for
Indoor A.
Screening Level
Screening Level
Calculated
CaloulatedNon-
CASq
Chemical Name:
Covicevtmdov
at25°C
calculations
Co(ug/m tiov
fm Carcinogens
for Non-
Carcinogenic Risk
Carcinogenic
(ug/L)
(dimensiovlese)
(dvnensiovless)
(ug/m')
®TCR=1E06
-Ai
Catch -0. Q
THO = 0.2
Hazard Quotient
156-59-2
Dichloroethvlene. 1.2cis-
101
0.166802944
0.166802944
16.8470973
156-60.5
Dichloroethvlene, 1.2-mans-
0.473
0.383483238
0.383483238
0.181387572
127-184
TemechlomethAene
18
0.723630417
0.723630417
13.02534751
1.1E+01
8.3E+00
1.2E-06
3.1E-01
79-01.6
Tnchl-thvlene
36.5
0.402698283
0.402698283
14.69848733
4.8E-01
4.2E-01
3.1E-05
7.0E+00
75-014
VinA Chloride
2.2
1.136549469
1.136549469
2.500408831
1.7E-01
2.1E+01
1.5E-05
2.4E-02
Cumulative: I 4.7E-05 7.4E+00

DSCA Indoor Air Risk Calculator -Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: Amenean Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: 2W-11
Average Groundwater Temperature(oC): 25 (Use defvult of25° C unless sitespecirc data is available -firming the groundwatertemperature during worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Henrys Constant
Cakulated
Indoor Afr
Indoor Ai
Groundwater
Henrys Constant
used for
Indoor A.
Screening Level
Screening Level
Calculated
CaloulatedNon-
CASq
Chemical Name:
Covicevtmdov
at25°C
calculadoos
Concevtmtiov
fm Carcinogens
fm Non-
Carcinogenic Risk
Cmoinogenic
(ug/L)
(dimensiovlese)
(dnnensionk.)
(ug/m')
®TCR - IE-06
Carchrogens Q
THO = 0.2
Hazard Quotient
156-59-2
Dwhlorecthvleuc. 1.2cis-
67.9
0.166802944
0.166802944
11.32591987
156-60.5
Dichloroethvlene, 1.2-mans-
0.292
0.383483238
0.383483238
0.111977105
127-184
TemachlomethAene
11.4
0.723630417
0.723630417
8.249386754
1.1E+01
8.3E+00
7.6E-07
2.0E-01
79-01.6
Tnchl-thvlene
24.2
0.402698283
0.402698283
9.745298446
4.8E-01
4.2E-01
2.0E-05
4.7E+00
75-014
VinA Chloride
1.43
1.136549469
1.136549469
1.62526574
1.7E-01
2.1E+01
9.7E-06
1.6E-02
Cumulative: I 3.1E-05 4.9E+00

DSCA Indoor Air Risk Calculator -Cumulative Risk for Resident
Version 7, August 2019
DSCA ID No: DC680002
Name/Address of DSCA Site: American Dry Cleaners, 210 South Estes Drive, Chapel Hill, Orange County, North Carolina
Name/Address of Sampling Location: Olin T Binkley Memorial Church, 1712 Willow Drive, Chapel Hill, Orange County, North Carolina
Sampling Dale: 6/10/2020
Sample ID: 2W-12
Average Groundwater Temperature(oC): 25 (Use deWftof2VC unless sitespecirc data is available -firming the groundwatertemperature during worst -case summercendillens.)
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
Henrys Constant
Cakulated
Indoor Afr
Indoor
Groundwater
Henrys Constant
used for
Indoor A.
Screening Level
Screening Level
Calculated
CalculetedNov-
CASH
Chemical Name:
Cov(ug/L) ov
a125°C
calculations
Co(ug/m tiov
fm Carcinogens
for Non-
Caroinogenic Risk
Carcinogenic
(ug/L)
(dimensiovlese)
(dvnensiovless)
(ug/m)
®TCR=1E06
-Ai
Catch Q
THO = 0.2
Hazffid Quotient
67-66-3
Chloroform
0.147
0.150040883
0.150040883
0.02205601
1.2E-01
2.0E+01
1.8E-07
2.2E-04
75-354
DichloroethYlrne. 1.1-
1.03
1.067048242
1.067048242
1.099059689
4.2E+01
5.3E-03
156-59-2
Diehlerecd lene. 1.2cis-
799
0.166802944
0.166802944
133.2755519
156-60.5
Dichloroethvlene. 1,2-mans-
5.31
0.383483238
0.383483238
2.036295993
127-184
Te-hlomethvlene
1340
0.723630417
0.723630417
969.6647588
1.1E+01
8.3E+00
9.0E-05
2.3E+01
76-13-1
Trichloro-1.2.2-uitluoroelhane. l.1.2-
1.8
21.50449714
2%50449714
38.70809485
1.0E+03
7.4E-03
79-01-6
Trichlomethvlene
226
0.402698283
0.402698283
91.8152085
4.8E-01
4.2E-01
1.9E-04
4.4E+01
75-014
Vinyl Chloride
1.136549469
1.136549469
1 1.7E-01
2.1E+01
Cumulative: I 2.8E-04 6.7E+0l

ATTACHMENT 17
MANN-KENDALL TREND ANALYSIS

MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
Evaluation Date: June 2020 Job ID: 60628609
Facility Name: American Dry Cleaners (DC680002) Constituent: PCE
Conducted By:AECOM Concentration Units: m /L
Sampling PointlD:
MW-2 I MW-3 I 2W-5 I 2W-6
I 2W-9 I 2W-10 I 2W-11
Sampling
Event
Sampling
�. te
PCE
• •
1
09/23/08
40.7 5.134
2
01/30/09
31.57
3.073
0.991
0.903
3
10/21/10
4.63
1.89
1.95
0.427
4
01/21/11
40.4
1.86
4.15
0.346
5
04/29/11
48.4
1.42
3.35
3.41
6
07/18/11
34.0
1.3
3.4
3.00
7
08/30/11
40.0
1.8
0.082
2.90
8
09/22/11
30.0
1.7
0.65
1.70
9
10/18/11
0.125
2.5
0.005
2.50
10
11/18/11
40.0
4.4
0.0025
1.80
11
02/23/12
37.0
4.1
0.005
2.60
12
05/24/12
37.0
3.3
0.0005
3.0
13
09/04/12
35.0
6.6
0.0005
0.84
14
11/12/13
43.0
5.9
2.10
15
07/08/14
0.47
7.2
2.9
16
11/23/15
13.9
1.58
0.0005
0.316
3.1
0.312
17
12/12/16
0.62
0.22
0.053
0.074
18
12/19/18
14.2
0.176
0.0482
0.0178
19
06/10/20
0.365
0.0018
0.0114
20
Red text indicates one-half of laboratory detection limit.
Coefficient of Variation
0.55 1 • -
Mann -Kendall Statistic (S):
Confidence Factor:
'
Concentration Trend:
Stable Stable Decreasing No Trend Decreasing Decreasing Decreasing
100
BMW-2
10 =MW-3
J
�zw-5
� 1 -zw-s
v 2W-9
C
O 0.1 - -2W-10
R -zw-i 1
0.01
N
C 0.001 -
O
C)
0.0001
02108 07/09 11/10 04112 08113 12114 05/16 09/17 02119 06/20 10/21
Sampling Date
i
Notes:
1. At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2. Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>O) or decreasing (S<O): >95% = Increasing or Decreasing;
>_ 90% = Probably Increasing or Probably Decreasing; < 90% and S>O = No Trend; < 90%, S:50, and COV >_ 1 = No Trend; < 90% and COV < 1 = Stable.
3. Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann -Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com

MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
Evaluation Date: June 2020 Job ID: 60628609
Facility Name: American Dry Cleaners (DC680002) Constituent: TCE
Conducted By:AECOM Concentration Units: m /L
Sampling PointlD:
MW-2 I MW-3 I 2W-5 I 2W-6
I 2W-9 I 2W-10 I 2W-11
Sampling
Event
Sampling
�. te
TCE
• •
1
09/23/08
1.208 0.73 2.55
2
01/30/09
1.886
0.629
0.429
0.21000
3
10/21/10
0.451
0.392
0.399
0.214
4
01/21/11
3.1
0.408
1.77
0.33
5
04/29/11
2.76
0.319
1.63
0.316
6
07/18/11
2.6
0.42
0.990
0.350
7
08/30/11
3.6
0.51
0.280
0.320
8
09/22/11
2.4
0.53
0.320
0.190
9
10/18/11
0.125
0.67
0.005
0.250
10
11/18/11
3.2
0.96
0.0025
0.220
11
02/23/12
3.0
1.1
0.005
0.240
12
05/24/12
2.6
1.6
0.001
0.250
13
09/04/12
2.5
1.9
0.001
0.280
14
11/12/13
2.9
0.73
0.890
15
07/08/14
0.140
0.24
3.5
0.69
16
11/23/15
1.36
0.335
0.00108
0.129
4.27
2.26
17
12/12/16
0.21
0.11
0.049
0.21
18
12/19/18
1.69
0.0862
0.036
0.0121
19
06/10/20
0.0792
0.00365
0.0242
20
Red text indicates one-half of laboratory detection limit.
Coefficient of Variation
0.52 1 • 0.60
Mann -Kendall Statistic (S):
Confidence Factor:
Concentration Trend:
Stable No Trend Decreasing No Trend Decreasing Decreasing I No Trend
1
BMW-2
J
-MW-3
_
'F!
-zw-s
C1
�X
`-�
-zw-s
0.1 -2W-9
C
0 -2W-10
R 0.01 -2W-11
L
r
0.001
O
C)
0.0001
02108 07/09 11/10 04112 08113 12114 05/16 09/17 02119 06/20 10/21
Sampling Date
Notes:
1. At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2. Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
>_ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S:50, and COV >_ 1 = No Trend; < 90% and COV < 1 = Stable.
3. Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann -Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com

ATTACHMENT 18
IDW DISPOSAL MANIFEST

Please print or type.
Fopn Approved. OMB No. 205M039
UNIFORM HAZARDOUS
1. Generator ID Number
2, Page 1 of
3. Emergency Response Phone
4. Manifest Tracking Number
WASTE MANIFEST
NICROW145706
1 1
255-31V443IMUM7As4
1 013311366 FL E
5. Generators Name and Mailing Address Generator's Site Address (if different than mejling address)
Petitioner for DSl Ske DC` 2, Slaw-# 029 Ai<aeeracaaa Dirt' Cleaners
DWM-DSCA 1646 Mail Se9iKip Cen-ter 201 S. rsies brave
Genera rs o —91 -1100 Ralugh, NC 276-99-1646 Chapel Hill, ids. £7707 S® -ffl Ca29
6. Transporter l Company Name U.S. EPA ID Number
!� 'y 5'Ag Sig ®o�FTS l� g+{ 9 { �yp��$ ,F—y §
i'.�ITD a==ar JI'Mel ..F+_e'Wa far(S � i9-C SIC10198-5-5i"a&_'k2£
7. Transporter 2 Company Name U.S. EPA ID Number
8. Designated Facility Name and Site Address U.S. EPA ID Number
Crean Harbors Dee pa'aak, L.P.
2927 ladepepilence Parkway _ell ` 14-1378
Fadlit's Phone: 2 - 0-2300 La Porte ' 77571 I ¢
ga,
9b. U.S. DOT Description (including Proper Shipping Name, Hazard Class, ID Number,
10. Containers
11. Total
12. Unit
HM
and Packing Group (If any))
Ouantity
WWoL
13. Waste Codes
No.
Type
Cf.e..
1.
's'l. x�-sa€S'si'i43s JC'�5$e E!3''gEs3r a,i7.s.
X
(etrasNorci a'flawr , 9, SGlii. ERG iff 171, W101
310
/(//Ic/✓1
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2.
Jul
3.
4.
14. Special Handlln Instructions an,,Additignal Info Non
9a_1} CH?92211 (liquids) I x _s%gall_ Emergency Res -pore¢_ Number
#0B-25t� a- -324
jab# 2006-1 P 0# t00 Cuoraa.,;:Nu bar M60007950.
15. GENERATOWSIOFFEROR'S CERTIFICATION: I hereby declare that the contents of [his consignment are fully and accurately described above by the proper shipping name, and are classified, packaged,
marked and labeled/placarded, and are In ail respects In proper condition for transport according to applicable International and national governmental regulations. If export shipment and I am the Primary
Exporter, I certify that the contents of this consignment conform to the terms of the attached EPA Acknowledgment of Consent
I cerfily that the waste minimization statement Identified in 40 CFR 26227(a) (if I am a large quantity generator) or (b) (if1 am a small quantity generator) is We.
GemmtoesslOfierorl1s``Pdntedrryped Name r,.x )er �•�je,y 1;a heW D Signa� Month Day Year
DGsA PC .huh0J ly <ifs : 6e,-0O 7
J
i—
16. International Shipments
❑import to U.S. ❑Expartfrom U.S. Port ofentrylexit
=
Transporter signature (for exports only): Date leaving U.S.:
W
V. TrensporterAcknowledgmenl of Receipt of Materials
Transporter 1 Pnntedlryped Name Signature Month , Day Year
5 //
%S
i
1+�4.`E. (,a1 /O d
aTransporter
2 PrintedFryped Name Signature Month Day Year
F
18. Discrepancy
18a. Discrepancy Indication Space ❑ Quantity ❑ Type ❑ Residue ❑ Paral Rejectlon Full Rejection
Manifest Reference Number:
18b. Alternate Facility (or Generator) U.S. EPA ID Number
J
U
LL
Facility's Phone:
18c. Signature of Alternate Facility (or Generator) „
Month Day Year
Q
Z
y19.
Ha mndous Waste Report Management Method Codes (i.e., codes for hazardous waste treatment, disposal, and recycling systems)
c
1.
2. 3.
a.
20. Designated Facility Owner or Operator. Certification of receipt of hazardous materials covered by the manifestexcept as noted In Item 18a
1
Printedffyped Name Signature Month Day Year
EPA Form 8700-22 (Rev. 12-M Previous editions are obsolete. DESIGNATED FACILITY TO EPA's e-MANIFEST SYSTEM

CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
LAND DISPOSAL RESTRICTION FORM LDRA
MANIFEST NO OI? 3 �� 9l'grj ALE
THE HAZARDOUS WASTES IDENTIFIED ON THE HAZARDOUS WASTE MANIFEST IDENTIFIED ABOVE AND BEARING THE EPA
HAZARDOUS WASTE CODES LISTED BELOW ARE RESTRICTED WASTES WHICH ARE PROHIBITED FROM LAND DISPOSAL
WITHOUT FURTHER TREATMENT UNDER THE LAND DISPOSAL RESTRICTIONS, 40 CFR PART 268.7 (a)(2), AND RCRA SECTION
3004(0). IN ACCORDANCE WITH 40 CFR 268.7(a), THE EPA WASTE CODE, WASTE SUBCATEGORY, AND TREATABILITY
GROUPS, AS APPLICABLE, ARE INCLUDED BELOW.
INSTRUCTIONS — COMPLETE ALL SECTIONS. REFER TO PAGE 3 OF THIS FORM FOR KEY TERMS/DEFINITIONS.
Column 1 - Line Item: Enter the manifest line item number (e.g., 11a) that corresponds to the waste code(s).
Column 2 - Waste Codes/Subcategory: Check off all applicable waste codes. For D001 through D043, also check applicable
subcategory; for F001 through F005, check applicable constituents.
Column 3 - Wastewater/Non-wastewater: Check off "WW" for wastewater and "Non-WW" for non -wastewaters.
Column 4 - LDR Handling Code: Circle the appropriate handling code, as follows:
1 = The waste is a characteristic hazardous waste D001, D002, D003, D004-0011, or D018-43 which is intended for
treatment/disposal in a CWA system, CWA-equivalent system, or Class I SDWA system. Underlying Hazardous Constituents
(UHC's) are NOT required to be identified.
1A= The waste is a characteristic hazardous waste D001 High TOC Ignitable Liquids Subcategory (i.e., greater than
or equal to lO %TOC). Pursuant to 40 CFR 268.40, the waste must be treated using organic recovery (RORGS) or combustion
(CMBST) technology. UHC's are NOT required to be identified.
2 = The waste is a characteristic hazardous waste D001 (other than High TOC Ignitable Liquids), D002, D003 Explosive, Water
Reactive or Other Reactive subcategory, D004-DO11. D012-17 non -wastewater, or D01 B-43 which is intended for
treatment/disposal in a non-CWA system, non-CWA-equivalent system, or non -Class I SDWA system located in the United States.
All UHC's which are reasonably expected to be present must be Identified, except for D001 waste that is Intended to be treated
using organic recovery (RORGS) or combustion (CMBST) technologies. Identify UHC's by completing Sections I and IV of CHI
Form LDR-1 Addendum and attach completed Addendum to this form.
3 = The waste is a characteristic (i.e., D-code) or listed (i.e., F-, K-, U-, or P-code) hazardous waste which is intended for export and
treatmenUdisposal at a facility located outside the United States. LDR treatment standards do not apply to hazardous waste
treated/disposed in a foreign country, and per USEPA guidance, the identification of UHC's (if applicable) is not required for
hazardous waste that is intended to be exported. Note however that if the exported waste is subsequently returned for
treatment/disposal in the United States, all applicable LDR regulations would apply and a revised LDR notification would be
required.
4 = The waste meets the definition of hazardous debris pursuant to 40 CFR 268.2(h) and is intended for treatment/ disposal in
compliance with the alternate debris treatment technologies of 40 CFR 268.45. In accordance With the requirements of 40 CFR
268.7(a)(2) : the contaminants subject to treatment (CSTT's) must be identified as part of this notification. Identify CSTTs by
completing Section III and IV of the CHI Form LDR-1 Addendum and attach completed Addendum to this form. These constituents
are being treated to comply with 40 CFR 268.45,
5 = The waste is a characteristic waste D003 Reactive Sulfide, Reactive Cyanide, or Unexploded Ordnance subcategory, a
characteristic waste D012- 17 wastewater, or a listed (i.e., F-, K-, U-, or P-code) hazardous waste. UHC's are NOT required to be
identified.
6 = The waste is a lab pack that is Intended for incineration using the alternative lab pack treatment standard under 40 CFR 268.42(c).
UHC's are NOT required to be identified; however, the generator must complete and attach the lab pack certification statement
on CHI Form LDR-LP. Note that in accordance with 40 CFR Part 268 Appendix IV, lab packs which contain waste codes 0009,
F019, K003, K004, K005, K006, K062, K071, K100, K106, P010, P011, P012, P076, P078, U134, and U151 are not eligible for
alternative lab pack treatment standard.
=M= UnTC. IC TYC \IIII\CTC IC A CM.1 1.I,1J A 11—M Mn -AMA nT­n IhI A— 111M r„� r��,�r�•-'�r�
SECTION I. CHARACTERISTIC WASTES D001 THROUGH D043
COLUMN 1: COLUMN 2:
LINE ITEM WASTE CODE / SUBCATEGORY
SEE MANIFEST
[ ] DOOI Ignitables, except High TOC subcategory
[ ] D001 High TOC Ignitable Liquids Subcategory
(Greater than or equal to 10% TOC)
[ ] D002 Corrosives
[ ] D003
[ ] Reactive Sulfide, per 261.23 (a)(5)
[ ] Reactive Cyanide, per 261.23(a)(5)
[ ] Explosive, per 261.23(a)(6), (7) & (8)
[ ] Water Reactive, per 261.23(a)(2), (3) & (4)
[ ] Other Reactive, per 261.23(a)(1)
[ j Unexploded Ordnance, Emergency Response
[ ] D004 Arsenic
[ ] D005 Barium
[ ] D006
[ ] Cadmium
[ ] Cadmium Containing Batteries
[ ] D007 Chromium
[ ] D008
[ ] Lead
[ ] Lead Acid Batteries
COLUMN 3:
WASTEWATER/
NON -WASTEWATER
[]WW []Non-WW
[ ] Non-WW only
[]WW []Non-WW
[ ] WW
[ ] Non-WW
[]WW
[]Non-WW
[ ] WW
[ ] Non-WW
[ ] Non-WW only
[]WW
[]Non-WW
[]WW
[]Non-WW
[]WW
[]Non-WW
[ ] WW [ ] Non-WW
[]WW []Non-WW
[ ] Non-WW only
[1WW []Non-WW
[]WW []Non-WW
[ ]Non-WW only
COLUMN 4:
HANDLING CODE
1
2
3
4 6
1A
3
6
1
2
3
4 6
1
3
4
5 6
1
3
4
5 6
1
2
3
4 6
1
2
3
4 6
1
2
3
4 6
1
3
4
5 6
1
3
4
5 6
1
3
4
5 6
1
2
3
4 6
2
3
6
1
2
3
4 6
1
2
3
4 6
2
3
6
CHI Form LDR-1, Page 1 of 3
[Effective 2/28/00]

CLEAN HARBORS ENVIRONMENTAL SERVICES, INC.
LAND DISPOSAL RESTRICTION FORM LDR-1 MANIFEST NO O /33I/34f 4f Xr-E
SECTION I. CHARACTERISTIC WASTES 0001-43 (CONTINUED)
COLUMN 1: COLUMN 2:
LINE ITEM WASTE CODE / SUBCATEGORY
SEE MANIFEST
[ ] D009
[ ] Low Mercury, less than 260 mg/kg Mercury
[ ] High Mercury Organic Subcategory
[ ] High Mercury Inorganic Subcategory
[ ] D010 Selenium
[ ] D011 Silver
[ ] D012 Endrin
[ ] D013 Undane
[ ] D014 Methoxychlor
[] D016 Toxaphene
[ ] D016 2,4-D
[ ] D017 2,4,5-TP (Silvex)
[] D018 Benzene
[ ] D019 Carbon tetrachloride
[ ] D020 Chlordane
[ ] D021 Chlorobenzene
[ ] D022 Chloroform
[ ] D023 o-Cresol
[ ] D024 m-Cresol
[ ] D025 p-Cresol
[ ] D026 Cresol
[ ] D027 1,4-Dichlorobenzene
[ ] D028 1,2-Dichloroethane
[ ] 0029 1,1-Dichloroethylene
[ I D030 2,4-Dinitrotoluene
[ ] D031 Heptachlor (and its epoxide)
[ ] D032 Hexachlorobenzene
[ ] D033 Hexachlorobutadiene
[ ] D034 Hexachloroethane
[ ] D035 Methyl ethyl ketone
[ ] D036 Nitrobenzene
[ ] D037 Pentachlorophenol
[ ] D038 Pyridine
[ ] D039 Tetrachloroethylene
[ I D040 Trichloroethylene
[ ] D041 2,4,5-Trichlorophenol
[ ] D042 2,4,6-T6chlorophenol
[ ] D043 Vinyl Chloride
SECTION II. SPENT SOLVENT WASTES F001 THROUGH F005
COLUMN 1: COLUMN 2:
LINE ITEM WASTE CODE / SUBCATEGORY
SEE MANIFEST
[ I Foot [,ZF002 [ ] F003 [ ] F004 [ ] F005
[ ] 1.
ALL F001-F005
[ ] 2.
Acetone
[ ] 3.
Benzene
[ ] 4.
n-Butyl alcohol
[ ] 5.
Carbon disulfide
[ ] 6.
Carbon tetrachloride
[ ] 7.
Chlorobenzene
[ ] 8.
o-Cresol
[ ] 9.
m-Cresol (difficult to
distinguish from
p-cresol
[ ] 10.
p-Cresol (difficult to
distinguish from
m-cresol)
[ ] 11.
Cresol - mixed isomers
(sum of o-, m- and
p-cresol)
COLUMN 3:
WASTEWATER/
NON -WASTEWATER
[ ]WW [ ]Non-WW
[ ] Non-WW only
[ ] Non-WW only
[]WW []Non-WW
[]WW []Non-WW
[IWW []Non-WW
[]WW I]Non-WW
[ ] WW [ ] Non-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
( ] WW [ ] Non-WW
[.]WW []Non-WW
[ 1 WW [ 1 Non-WW
[]WW []Non-WW
[]WW []Non-WW
[ ]WW [ ] Non-WW
[]WW []Non-WW
[]WW IINon-WW
[]WW [INon-WW
[]WW []Non-WW
[]WW []Non-WW
[ I WW [ ]Non-WW
[ ]WW [ 1 Non-WW
[]WW []Non-WW
[]WW [jNon-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
[]WW []Non-WW
[ ] WW [ ] Non-WW
[]WW []Non-WW
COLUMN 3:
WASTEWATER/
NON -WASTEWATER
( 1 WW Nor~
[ ] 12. Cyclohexanone
[ ] 13. o-Dichlorobenzene
[ ] 14.2-Ethoxyethanol(F005)
only)
[ ] 15. Ethyl acetate
[ ] 16. Ethyl benzene
[ ] 17. Ethyl ether
[ ] 18. Isobutyl alcohol
[ ] 19. Methanol
[ ] 20. Methylene chloride
[ ] 21. Methyl ethyl ketone
[ ] 22. Methyl Isobutyl ketone
f 1 23. Nitrobenzene
[ ] 24. 2-Nitropropane (F005
only)
COLUMN 4:
HANDLING CODE
4
4
5
5
5
5
5
5
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
COLUMN 4:
HANDLING CODE
3 4 fat 6
[ ] 25. Pyridine
[ ] 26. Tetrachloroethylene
[ ] 27. Toluene
[ ] 28. 1,1,1-Trichloro-
ethane
[ ] 29.1,1,2-Trichloro-
ethane
[ ] 30. Trichloroethylene
[ ] 31. 1,1,2-Trichloro-
1,2,2-trifluoroethane
[ ] 32.Trichioromonofluoro-
methane
[ ] 33. Xylene - mixed isomers
(sum of o-, m-, and
p-xylene)
CHI Form LDR-1, Page 2 of 3 [Effective 2128/00]

CLEAN HARBORS ENVIRONMENTAL SERVICES, INC. p/33 ��T(of4 ,ALE
LAND DISPOSAL RESTRICTION FORM LDR-1 MANIFEST NO
SECTION III. CALIFORNIA LIST WASTES
COLUMN 1: COLUMN 2: COLUMN 3: COLUMN 4:
LINE ITEM WASTE CODE / SUBCATEGORY WASTEWATER/ HANDLING CODE
SEE MANIFEST NON -WASTEWATER
Hazardous waste containing one or more of the following [ ] W W [ ] Non-W W 1 2 3 4 6
California List constituents:
[ ] ALL CALIFORNIA LIST CONSTITUENTS
[ ] Liquids with nickel greater than or equal to 134 mg/I
[ ] Liquids with thalllum greater than or equal to 130 mg/I
[ ] Liquids with PCB's > or = 50 ppm
[ ] Waste containing HOC's > or = 1,000 mg/kg
SECTION IV. OTHER LISTED WASTES (F006-12 F019-F028 F037-38 F039 K- U- AND P-CODES)
COLUMN 1: COLUMN 2: COLUMN 3:
COLUMN 4:
LINE ITEM WASTE CODE / SUBCATEGORY WASTEWATER/
HANDLING CODE
SEE MANIFEST NON -WASTEWATER
[] W W [] Non-W W
3 4 5 6
[]WW []Non-WW
3 4 5 6
[]WW []Non-WW
3 4 5 6
[]WW []Non-WW
3 4 5 6
[]WW []Non-WW
3 4 5 6
[ ] CHECK HERE IF ADDITIONAL LISTED WASTE CODES ARE PRESENT. COMPLETE AND ATTACH LDR-1 CONTINUATION
SHEET.
[ ] CHECK HERE IF WASTE CODE F039 (MULTISOURCE LEACHATE) IS PRESENT. IDENTIFY F039 CONSTITUENTS BY
COMPLETING SECTIONS II AND IV OF CHI FORM LDR-1 ADDENDUM AND ATTACH COMPLETED ADDENDUM TO THIS FORM.
SECTION V. CONTACT NAME AND DATE /�/)/ On behalf of DSCA �Pei�itioner Site ➢C(pg Q00z �,5 ""a/Z
Print Name: N C✓ J " $ C P"I Date: 0�
KEY TERMS/DEFINITIONS
CLASS I SDWA SYSTEM means a Class I deep well facility regulated under the Safe Drinking Water Act (SDWA).
CWA SYSTEM means a centralized wastewater treatment facility discharging under a Clean Water Act (CWA) permit. For example, a CWA
facility would treat organic or inorganic aqueous wastes and discharge the treated effluent to the local sewer system. Examples of CWA
treatment systems owned and operated by Clean Harbors include the wastewater treatment operations at Baltimore (including the CES
system), Bristol, Chicago, Cincinnati and Cleveland.
CWA-EQUIVALENT SYSTEM means a "zero discharge system" that engages in "CWA-equivalent" treatment before land disposal. Zeno -
discharge facilities treat hazardous wastes using "CWA-equivalent" treatment methods, but do not discharge the treatment effluent to a
sewer or water body (e.g., spray irrigation land farm). "CWA-equivalent" treatment methods means biological treatment for organics, alkaline
chlorination, or ferrous sulfate precipitation for cyanide, precipitation/ sedimentation for metals, reduction of hexavalent chromium, or other
treatment technology that can be demonstrated to perform equally or greater than these technologies.
HIGH TOC IGNITABLE LIQUIDS SUBCATEGORY means an Ignitable liquid hazardous waste (waste code D001) which contains
greater than or equal to 10% total organic carbon (TOC). Pursuant to 40 CFR 268.40, such wastes must be treated using organic recovery
(RORGS) or combustion (CMBST) technology. Examples of RORGS technologies include the CES unit at Clean Harbors of Baltimore.
Examples of CMBST technologies include hazardous waste fuel blending and subsequent reuse at a cement kiln, or destruction at a RCRA
Incinerator.
WASTEWATERS are wastes that contain less than 1% by weight total organic carbon (TOC) and less than 1% by weight total suspended
solids (TSS). [See 40 CFR 268..2(f)]
CHI Form LDR-1, Page 3 of 3 [Effective 2/28/001

ATTACHMENT 19
SOP - GROUNDWATER SAMPLING USING DISPOSABLE BAILERS

► ECOM
AECOM — North Carolina Standard Operating Procedures
Groundwater Sampling Using Disposable Bailers
1. Purpose and Scope
Standard operating procedures to collect groundwater samples using disposable bailers.
2. Procedure
2.1 Required Equipment
• HASP
• Field Note Book and sampling logs.
• Polypropylene rope, scissors (instrument to cut rope)
• Bailer
• Electronic water level indicator or oil -water interface probe
• Collection container (5-gallon buck or similar container)
• PPE
• Sample bottles
• Calculator
• Water Quality Meter
2.2 Procedure
1. Review HASP. The field technician will don nitrile (or other HASP -approved gloves based on
contaminants) gloves for all associated field work and sampling.
2. Open all wells to be sampled and allow equilibration time. Well caps should be placed
adjacent to the monitoring wells on a clean area such as a small piece of plastic or towel.
3. Measure static water levels and total depth of well using the electronic water level
indicator, or other similar device, and utilizing decontamination procedures to
decontaminate the water level indicator before measuring water levels in the first well,
between each well, and after completion of all water level measurements.
4. Calculate and record in the field book the volume of water in each well casing to be
sampled. Sometimes this may be performed prior to field activity.
Calculate borehole volume using formula: v =
n r2 L Where:
v = Volume
L = Length of well, and
r = Radius of well
Groundwater Sampling Using Disposable Bailers ()
Revision June 7, 2017
PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 1/2

► ECOM
or use Cheat Sheet:
Well Diameter
(Inches)
Gallons/Foot
2
0.16
3
0.37
4
0.65
5
1.02
6
1.47
7
2.00
8
2.61
9
3.30
10
4.08
12
5.87
14
8.00
16
10.50
18
13.20
20
16.30
24
23.50
36
52.90
5. Record the required purge volume in the field book (this should be three times the calculated
volume of water in the well casing) and sample log. Purge at least the required volume of
water from the monitoring well using a new or dedicated bailer and a new length of
polypropylene rope secured tightly to the top of the bailer.
6. Place purge water in collection container for measurement purposes. Record in the field
book the total amount of water purged from the well. Place purge water on ground, in 55-
gallon drum or in other storage container as specified in work plan. If the well bails dry prior
to the removal of three well volumes, record the amount of water purged, allow the well to
recharge. It is not necessary to remove three well volumes from wells that bail dry.
7. Water level and water quality parameters (pH, specific conductance, dissolved oxygen and
turbidity) need to be measured following purging.
8. Lower the bailer back into the well to collect sample. Place groundwater directly into
laboratory supplied sample containers with appropriate preservatives (if required). If filtering
is required for analysis, place water in unpreserved bottle, and request that laboratory filter
sample. If additional groundwater is required to fill all necessary sample bottles, lower bailer
back into well and collect additional groundwater. Seal container.
9. Label sample bottles — date, time, project identifier, sample location, depth (if required),
required analysis, preservative (if used), and sampler's initials. Place samples in cooler with
ice. Complete chain -of -custody form (supplied by the laboratory) and record site activities
in field log book. Pack cooler for shipping or deliver samples to laboratory. Retain a copy of
chain -of -custody and submit other copies with samples. Close and secure all wells.
3. Records
List of the official records that are generated and support this procedure
a. Field Notes
b. Equipment Calibration Sheets
AECOM
Groundwater Sampling Using Disposable Bailers ()
Revision June 7, 2017
PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 2/2

ATTACHMENT 20
SOP - SOIL GAS SAMPLING

tiLVMInnagine it.
Del eed.
AECOM — North Carolina Standard Operating Procedures
Soil Gas Sampling
1. Purpose and Scope
Standard operating procedure for the collection of soil gas samples using laboratory provided Summa canisters.
2. Procedure
2.1 Required Equipment:
• Project Health and Safety Plan (HASP)
• Work Plan
• Summa Canister with a Flow Regulator from a certified laboratory (precalibrated for an 0.5 hour interval)
• Field forms — Summa Canister Field Sampling Data Sheet
• '/4" Stainless steel nuts and ferrules
AMS Probe Kit or Hand Auger
• 1/4" OD x 1/8" ID Teflon tubing
• #2 driller sand
Hydraulic cement or bentonite
• Water
• Ziplock bags
Helium detector
• Helium
• Hand Vacuum Pump or Gilian GilAir Pump
• Tedlar bags
• Safety Cones
• Laminated Sign to notify Air Sampling in progress
• Chain of Custody (COC)
• FedEx forms
• Standard wrench set
• Digital camera
2.2 AMS Soil Gas Sampling Method
1. Prior to sampling, locate any underground utilities to insure the safety of subsurface work conditions.
2. Use a 1'/2 inch stainless steel concrete bit and rotary hammer drill to core an entrance into the concrete or
asphalt slab if needed.
3. Attach Teflon tubing to the barb tang of the retractable stainless steel screened soil gas vapor sampling tip.
4. Cut the tubing to the desired length so you can feed it through extra extension rods.
5. Attach the Retractable stainless steel screened soil gas vapor sampling tip to the extension rod. Place the
extension drive adaptor to the opposite end of extension rod to protect threads when using the rotary hammer
drill.
Soil Gas Sampling (Rev1)
Revision March 13, 2018
PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 1/4

AC^M Imagined.
V Delivered.
6. Place the tip and the extension rod into the cored out hole and place the hammer drill in line with the extension
drive adaptor.
7. Using the hammer drill, drive the tip and extension rod into the ground and add extension rods as needed to the
desired depth beneath the ground surface. Fully tighten rods together to protect threads.
8. Using the jack supplied in the kit, jack out the extension rod a couple of inches to release the screen.
9. With the screen released, use a hand held vacuum pump to purge the subsurface air through the Teflon tubing.
10. After the soil gas vapor sampler is purged, connect the stainless steel summa canister to the Teflon tubing using
air tight stainless steel fittings. Utilize the laboratory supplied flow controller to pull the sample over the desired
time interval.
11. To remove the retractable stainless steel vapor sampling tip, use the jack supplied in the kit. Connect it under
the extension drive adaptor and continue to jack the tip out of the ground fully.
12. Dissassemble the stainless steel vapor sampling tip.
13. Remove the Teflon tubing from the barb tang at the top of tip and dispose of the tubing.
14. Decontaminate the tip with soap that does not affect environmental parameters (Liquinox) and use a soft -bristle
brush to wash away all dirt from the extensions and tip parts. Rinse with clean fresh water and let air dry.
2.3 Permanent Soil Gas Vapor Sampler:
Permanent sampling tips can also be installed using the same method as described above. However, a different
sampling tip is installed.
The tip shown above is a permanent tip that can be used for multiple vapor monitoring events. The design is the
same but uses a Teflon umbrella to seal the screen into place. (Bentonite can also be placed in the hole above
the screen to provide a tighter seal for a longer period of time).
Sampling from the permanent tips can be performed using the method described above.
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Soil Gas Sampling (Rev1)
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V Delivered.
2.4 AMS Vapor Implants Sampling Method
1. Prior to sampling, locate any underground utilities to insure the safety of subsurface work conditions.
2. Use a clean, stainless steel hand auger to auger down to the desired depth of soil gas vapor sampling beneath
the ground surface. Note: Vapor implant should not be placed in saturated soils.
3. Attach Teflon tubing to the barbed tang of a 6" AMS Vapor Implant (AMS Item #21010). Make sure that the
connection between the barbed end of the implant and the Teflon tubing is secure.
4. Lower the AMS Vapor Implant and attached tubing into the borehole until the Implant reaches the desired depth.
The top of the vapor implant should be a minimum of five feet below ground surface.
5. Cut the tubing to the desired length so that you have approximately 2' of extra tubing to attach to the summa
canister.
6. Using #2A filter sand, add enough sand to cover the 6" Implant and 2-3" above the Implant. Check the depth of
sand using a measuring tape.
7. Add 10-12" of hydraulic cement or bentonite to the top of the sand to create a seal. Check the depth of sand
using a measuring tape. If using bentonite, hydrate the bentonite to ensure a proper seal. Wait 2 hours or until
the hydraulic cement has fully hardened, whichever is longer.
8. Use a hand held vacuum pump to purge the subsurface air through the Teflon tubing. Purge a minimum of one
pore volume of the borehole. The pore volume should be a minimum of the volume of the tubing and
sand filter pack.
Calculate pore volume using formula: v = Tr ra2La + Tr rt2Lt where:
v = Volume
La = Length of sand -filled annular space, and
ra = Radius of annular space
Lt = Length of tubing, and
rt = Radius of tubing
9. Thread the tubing through the helium leak test device (helium chamber).
10. Attach the helium detector to the helium leak test device. Attach the helium container to the leak test device
using teflon tubing and fill the leak test device with helium until the helium detector reads >50%.
11. Use the hand pump to fill a 1 Liter tedlar bag with air from the sample port.
12. Close the tedlar bag and detach it from the pump.
13. Turn off the flow of helium into the helium leak test device.
14. Remove the helium detector from the leak test device and allow the helium detector reading to reach 0 ppm.
15. Insert the helium detector into the silicon tubing attached to the tedlar bag and open valve on the bag.
16. Record the reading. If the reading is below 10% of the value measured within the test device, proceed to the
next step. If the reading is above 10%, repeat the leak test and reconstruct the sample point as necessary.
AECOM
Soil Gas Sampling (Rev1)
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Ima
ine it.
tiCVM Delge ed.
17. Be sure that the valve to the tedlar bag is open and that nothing is blocking the flow to the helium detector. The
detector may produce false readings if the detector pump is strained or if methane is present in the soil gas.
18. After the helium test has been satisfactorily completed and soil gas vapor sampler is purged, connect the
stainless steel summa canister to the Teflon tubing using air tight stainless steel fittings. Utilize the laboratory
supplied flow controller to pull the sample over the desired time interval.
19. To remove the stainless steel Implant, break up the hydraulic seal. Tug gently on the Teflon tubing until the
Implant is freed.
20. Remove the Teflon tubing from the barb and dispose of the tubing and the disposable stainless steel Implant.
21. Backfill borehole.
Records
a. Summa Canister Field Data Sheet
b. Equipment Calibration Sheets
4. Attachments
a. Summa Canister Field Data Sheet
AECOM
Soil Gas Sampling (Rev1)
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Summa Canister Sampling Field Data Sheet
Site:
Sam[
Date:
Sample#
Location
Summa Canister ID
Flow Controller ID
Additional Tubing Added
NO/
YES - How much
NO/
YES - How much
NO/
YES - How much
NO/
YES - How much
NO/
YES - How much
Purge Time (Start)
Purge Time (Stop)
Total Purge Time (min)
Purge Volume
PID Test of Purge Air
Initial Tracer Gas Results
Pressure Gauge - before
sampling
Sample Time (Start)
Sample Time (Stop)
Total Sample Time (min)
Pressure Gauge - after
sampling
Sample Volume
Canister Pressure Went to
Ambient Pressure?
YES / NO
YES / NO
YES / NO
YES / NO
YES / NO
Final Tracer Gas Results
Associate Ambient Air
Sample Number
General Comments: