MO-88110_88110_CA_O_20190624_Soil Vapor Letter to Wilson Residents (Lot 6)

JACOBS
June 24, 2019
Delivered via Email ([e-mail])
Mr. and Mrs. Derek Wilson
1243 Middlecrest Drive NW
Concord, North Carolina 28027
Subject: Results from Recent Soil Vapor Monitoring
Plantation Pipe Line Company
Poplar Tent Road Site
NCDEQ Groundwater Incident No. 88110
Dear Mr. and Mrs. Wilson,
14120 Ballantyne Corporate Place, Suite 200
Charlotte, North Carolina 28277
United States
T +1.704.544.4040
F +1.704.544.4041
www.jacobs.com
Thank you for allowing Plantation Pipe Line Company's representatives (Jacobs) to conduct semiannual
soil vapor monitoring activities on your property in April 2019. The purpose of this letter is to provide a
summary of the monitoring activities conducted on your property, along with a summary of the analytical
results.
April 2019 Monitoring Activities
On April 16, 2019, Jacobs sent you an email requesting access to your property to collect samples from
soil vapor monitoring points SV-5R and SV-14R (see attached figure). On April 24, 2019, leak checks
were conducted on each soil vapor monitoring point prior to collecting a vapor sample. Both soil vapor
monitoring points passed the leak check and were purged with an electric sampling pump prior to sample
collection. Soil vapor samples were then collected using vacuum canisters and sampling syringes with
charcoal tubes. The samples were submitted to Eurofins TestAmerica in Knoxville, Tennessee for
analysis of benzene, toluene, ethylbenzene, xylenes (BTEX), naphthalene, and 2-methyl naphthalene.
Analytical Results
The analytical data from the April 24, 2019 monitoring event are attached to this letter and are
summarized in Table 1. When reviewing the laboratory analytical report, please note the sample
identifications for your soil vapor monitoring points are SV-5R-042419, and SV-14R-042419. Duplicate
samples were collected from soil vapor monitoring point SV-5R as part of a standard practice to measure
field and laboratory precision, as well as to provide an indication of the comparability of the results. The
duplicate sample identification is SV-5RD-042419. Data from historical monitoring events are shown in
Table 2.
Of the samples collected from your property, increased naphthalene and 2-methyl naphthalene
concentrations were detected in samples collected from one location, SV-5R, during this monitoring
event. The analytical results show that naphthalene was detected at an estimated concentration
exceeding the North Carolina Department of Environmental Quality (NCDEQ) and United States
Environmental Protection Agency (USEPA) regulatory screening criteria in the samples collected from
Jacobs Engineering Group Inc.

Mr. and Mrs. Derek Wilson
June 24, 2019 JACOBS
Page 2 of 3
monitoring point SV-5R, which is screened from 5 to 7 feet below ground surface. There are no screening
criteria for 2-methylnaphthalene. The purpose of these soil gas criteria is for "screening" site data to help
identify areas, contaminants, and conditions that may require further evaluation or attention. No other
analytes exceeded the soil gas screening criteria.
The April 2019 monitoring event represents the first and only time in 20 monitoring events over a 12-year
period that naphthalene has been detected above screening criteria. Based on historical site data, it is
uncommon for naphthalene to be detected in a soil vapor sample when benzene, toluene, ethylbenzene,
or xylenes are not detected, as was the case during this monitoring event. Additionally, naphthalene
concentrations in groundwater have been below the North Carolina Groundwater Quality Standard in all
monitoring wells during the last three monitoring events (since April 2018). An additional soil vapor
sample will be collected from SV-5R in July 2019 to recheck the results from April.
The results show that the BTEX, naphthalene, and 2-methylnaphthalene compounds were not detected
above their respective laboratory reporting or method detection limits in the sample collected from SV-
14R.
Factors Influencing the Analytical Results
In general, soil vapor monitoring results are expected to vary over time due to several factors, including
seasonal temperature changes, changes in barometric pressure, changes in water table elevations,
changes in subsurface conditions due to precipitation prior to a monitoring event, changes in subsurface
conditions due to operating the remediation system, and variations in the contaminant source
concentrations.
An evaluation of precipitation data, vacuum monitoring data, and analytical data to date generally shows
that during and following precipitation events positive pressure and elevated concentrations are observed
in SV-5R; during drier periods, vacuum influence and relatively lower chemical concentrations are
observed. This trend suggests that the soil vapor extraction (SVE) system was positively influencing SV-
5R and the surrounding area during periods of drier weather; however, during periods of increased
precipitation, positive pressure is noted, along with elevated concentrations. During the first quarter of
2019, the Concord area received approximately 14 inches of rain compared to approximately 8 inches
during the first quarters of 2017 and 2018, which may have contributed to these results.
Similar conditions regarding precipitation and vacuum and pressure readings have been observed at SV-
14R, although to a lesser extent, likely due to the proximity of SV-14R to the SVE well and potentially
more permeable soil near SV-14R.
Soil Vapor Monitoring Plan
Plantation plans to collect a soil vapor sample from monitoring point SV-5R during the July 2019 quarterly
monitoring event to confirm the April 2019 detections of naphthalene and 2-methyl naphthalene. A Jacobs
representative will contact you separately to coordinate this monitoring event.
As discussed in the Meeting Summary and Rebound Monitoring Plan letter that Jacobs submitted to
NCDEQ on May 30, 2019, the biosparging and SVE systems were turned off at the end of April 2019 for
rebound monitoring through April 2020.
Thank you for your assistance and we apologize for any inconvenience this sampling program may
cause. Please feel free to contact me at 704.543.3285 or Jerry Aycock with Plantation at 770.751.4165 if
you have any questions about the monitoring results. The NCDEQ is an additional resource to discuss
aspects of the site and our monitoring activities. Ms. Trudy Beverly is the NCDEQ case manager and can
be contacted at 704.663.1699 concerning this site (NCDEQ Incident #88110).
Again, thank you for your cooperation.

Mr. and Mrs. Derek Wilson
June 24, 2019
Page 3 of 3
Sincerely,
Mike Skeean, P.E.
Project Manager
JACO BS'
Copies to: Jerry Aycock, Plantation (via email)
Trudy Beverly, North Carolina Department of Environmental Quality (via email and USPS)
Brian Pace, Laureldale LLC (via email)
File —Jacobs
Attachments:
Table 1 — Soil Vapor Analytical Results (April 2019)
Table 2 — Historical Soil Vapor Analytical Results (October 2007 through April 2019)
Figure 1 — Biosparging/SVE System As -Built
Analytical Laboratory Report

Tables

Table 1
Soil Vapor Analytical Results (April 2019)
Poplar Tent Road
Plantation Pipe Line Company
Concord, Cabarrus County, North Carolina
C L19
= v
N
LCl
C
c
h
aD
c
%+ ti
Date Collected
G>
c 0
y
0
r
0
r
X O
G1 r
�' O
M
O
t M r
°' O
Sample ID
(MM/DD/YYYY)
m
�
>+
t
a
X
0
Q.
a
LU
Z
C
p /m3
SV-5 R-042419
04/24/2019
ND <2.6
N D <4.5
ND <3.5
ND <3.5
ND <3.5
280 J
34 J
SV-5 R D-0424191
04/24/2019
ND <2.6
N D <4.5
ND <3.5
ND <3.5
ND <3.5
260 J
32 J
SV-14R-042419
04/24/2019
ND <2.6
N D <4.5
ND <3.5
ND <3.5
ND <3.5
N D <9.4 J4
N D <4.2 J4
Soil Gas Screening Criteria
120
34,800
374
695
695
20.9
NS
Soil Gas Screening Criteria
120
34,800
374
695
695
21
NS
Notes:
'Duplicate sample collected from SV-5R.
2February 2018 North Carolina Department of Environmental Quality Division of Waste Management Residential Vapor Intrusion Screening Levels for Sub -Slab and
Exterior Soil Gas (SGSL) based on an attenuation factor of 0.03. https://files.nc.gov/ncdeq[Waste%20Management/DWM/SF/RiskBasedRemediation/Feb2018_Res_VISLs.pdf
3USEPA Vapor Intrusion Screening Levels (VISL) Calculator (AF = 0.03), TRL = 10-5 or THQ = 0.2, accessed June 19, 2019. https://epa-visl.ornl.gov/cgi-bin/visl_search
4The method detection limit is presented for samples analyzed by TO-17 in April 2019.
< - Indicates value is less than the shown reporting limit
pg/m3 - micrograms per cubic meter
J - estimated value
ND - not detected
NS - no soil gas screening criteria available
AF - Attenuation Factor
TRL - Target Risk Level
THQ - Target Hazard Quotient
USEPA - United States Environmental Protection Agency
Bold text with gray highlighting indicates exceedance of one or more screening criteria

Table 2
Historical Soil Vapor Analytical Results (October 2007 through April 2019)
Poplar Tent Road Site
Plantation Pipe Line Company
Concord, Cabarrus County, North Carolina
Sample ID
Collected
0CU0I A'1rl
6
y ,
~
2 6
o f
a
c
NI
6
y t,
y�
v
�
6
a
-5 6
�
c
a
o
�.
a
Z
v
O
!
m
Z
�'C
N cwa
-(MM/DD/YYYY)
C
ca
iZ
o
C
C
M
L
n1
... N
Ov
6Date
'
X
µg/ms
SV-05-100307
10/3/2007
ND < 2.4
0.6
1
ND < 2.4
0.6 J
ND < 2.4
ND < 2.4
NA
0.49 J
NA
3.0 1
SV-5
11/27/2007
ND < 1.9
11
2.9
8.5
3.0
ND < 1.9
NA
ND < 1.9
NA
11.5
SV-5R-111612
11/16/2012
ND<2.36
7.86
1
ND<3.20
ND<6.40
ND<3.20
ND<3.87
4.8
ND<4.29
ND<2.1
ND<3.20
SV-5R-D-1116121
11/16/2012
ND < 2.45
6.67
1
ND < 3.33
18.3 J
4.33
il
ND < 4.03
7.3 1
6.33 J
ND < 2.2
22.6 1
SV-5R-0304132
03/04/2013
ND < 0.23
0.14
1, B
ND < 0.30
ND < 0.30
0.016
1
ND < 0.30
ND < 2.50
ND < 1.50
ND < 2.50
NA
SV-5RD-0304131"
03/04/2013
ND < 0.22
0.25
1, B
0.021 1
0.054 J
0.024
1
ND < 0.29
ND < 2.50
ND < 1.40
ND < 2.50
NA
SV-5R-0304133
03/04/2013
ND < 1.66
1.20
1
ND < 2.26
0.663 1
ND < 2.26
ND < 2.73
ND < 2.40
ND < 6.03
ND < 2.40
ND < 6.80
SV-5RD-0304131"
03/04/2013
ND<1.76
0.556
1
ND<2.39
ND<4.77
ND<2.39
ND<2.89
ND<2.40
ND<6.39
1.0 1
ND<7.20
SV-5R-080S13
8/5/2013
0.071 1
0.30
0.029 1
0.11 J
0.085
1
0.085 J
ND < 2.5
ND < 0.77
ND < 2.5
NA
SV-5RD-080513'
8/5/2013
0.071 1
0.26
0.020 1
0.049 J
0.03
1
0.039 1
ND < 2.5
ND < 0.82
ND < 2.5
NA
SV-5R-022714
02/27/2014
0.091 1
0.28
0.048 1
0.19
0.087
1
0.056 J
ND < 2.5
0.18 X
ND < 2.5
NA
SV-5RD-022714'
02/27/2014
0.13
0.27
0.052 1
0.18
0.082
1
0.049 1
ND < 2.5
ND < 0.16 X
ND < 2.5
NA
SV-5R-092314
09/23/2014
0.039 1
0.11
1
ND < 0.15
0.035 J
0.015
1
NA
ND < 2.5
NA
ND < 2.5
NA
SV-5RD-092314'
09/23/2014
0.14 1
0.054
1
ND < 0.14
0.026 J
ND < 0.14
J
NA
ND < 2.5
NA
ND < 2.5
NA
SV-5R-042815
04/28/2015
ND<0.16
ND<0.81
ND<0.81
ND<0.81
ND<0.81
NA
ND<2.5 R
NA
ND<2.5 R
NA
SV-5RD-042815'
04/28/2015
0.25
0.27
1
ND<0.78
ND<0.78
ND<0.78
NA
ND<2.5 R
NA
ND<2.5 R
NA
SV-5R-101315
10/13/2015
62 J
ND <360
150 1
440
160
1
NA
ND <2.5
NA
ND <2.5
NA
SV-5RD-101315'
10/13/2015
ND <68
ND <340
150 J
430
180
J
NA
ND <2.5
NA
ND <2.5
NA
SV5R-121015
12/10/2015
91
ND <86
480
2,400
2,100
NA
NA
NA
NA
NA
SV5RD-1210151
12/10/2015
120
ND <87
600
2,900
2,600
NA
NA
NA
NA
NA
SV-5R-022916
02/29/2016
5.1 J
ND <3.5
57 J
340 J
510
J
NA
3.1
NA
3.0
NA
SV-5RD-022916'
02/29/2016
12 J
4.2
1
140 J
820 1
1,200
1
NA
2.0 J
NA
2.1 1
NA
SV-5R-041116
04/11/2016
21
ND<42
320
1,700
1,600
NA
2.2 J
NA
ND<2.5
NA
SV-5RD-041116'
04/11/2016
21
ND < 38
310
1,700
1,600
NA
2.3 J
NA
ND < 2.5
NA
SV-5R-062716
06/27/2016
1.2
1.2
17
110
260
D
NA
1.1 J
NA
ND < 2.5
NA
SV-5RD-062716'
06/27/2016
0.90
0.57
1
16
110
250
D
NA
1.5 1
NA
0.77 1
NA
SV-5R-090716
09/07/2016
0.17 J
1.3
ND <0.89
ND <0.89
ND <0.89
NA
ND <2.5
NA
0.64 J
NA
SV-5RD-090716'
09/07/2016
ND <0.20
0.54
1
ND <1.0
ND <1.0
ND <1.0
NA
ND <2.5
NA
0.45 J
NA
SV-5R-101816
10/18/2016
ND <0.15
0.30
1
ND <0.76
ND <0.76
ND <0.76
NA
ND <2.5
NA
ND <2.5
NA
SV-5RD-101816'
10/18/2016
ND <0.15
ND <0.74
ND <0.74
ND <0.74
ND <0.74
NA
ND <2.5
NA
ND <2.S
NA
SV-5R-041817
04/18/2017
ND <7.5
ND <37
13 J
97
130
NA
ND <2.5
NA
0.44 J
NA
SV-5RD-041817'
04/18/2017
ND <7.3
ND <36
13 J
100
140
NA
ND <2.5
NA
ND < 2.5
NA
SV-5R-100917
10/09/2017
ND <0.73
1.4
J
1.8 J
14
27
NA
2.0 J
NA
0.63 1
NA
SV-5RD-100917
10/09/2017
ND <0.75
ND <3.8
1.9 1
14
27
NA
1.6 1
NA
ND < 2.5
NA
SV-5R-041718
04/17/2018
ND <7.3
ND <36
ND <36
ND <36
12
NA
ND <2.5
NA
5.0
NA
SV-5RD-041718'
04/17/2018
NA
NA
NA
NA
NA
NA
ND <2.5
NA
4.9
NA
SV-5R-101718
10/17/2018
NA
NA
NA
NA
NA
NA
ND <2.5
NA
3.5
NA
SV-5RD-101718'
10/17/2018
NA
NA
NA
NA
NA
NA
ND <2.5
NA
3.1
NA
SV-5R-101918
10/19/2018
ND <7.6
S.6 J
ND <39
ND <83
5.91
NA
NA
NA
NA
NA
SV-5RD-101918'
10/19/2018
ND <8.0
ND <42
ND <42
ND <88
ND <42
NA
NA
NA
NA
NA
SV-5R-042419
04/24/2019
ND <2.6
ND <4.5
ND <3.5
ND <3.5
ND <3.5
NA
280 J
NA
34 1
NA
SV-5RD-042419'
04/24/2019
ND <2.6
ND <4.5
ND <3.5
ND <3.5
ND <3.5
NA
260 J
NA
32 1
NA
SV-14-100307
10/3/2007
ND<2.3
0.3
1
ND<2.3
ND<4.7
ND<2.3
4.0
NA
1.3 J
NA
ND<7
SV-14
11/28/2007
ND < 1.8
1.4
1
0.53 1
1.S J
0.56
1
ND < 1.8
NA
ND < 1.8
NA
2.06 1
SV-14R-111612
11/16/2012
ND<0.89
ND<1.05
1.50 Ji
4.15 1
ND<1.21
ND<1.47
4.6
ND<1.63
ND<1.7
5.30 J
SV-14R-030413Z
03/04/2013
ND < 0.21
0.27
1, B
0.016 1
0.059 J
0.046
1
0.12 1
ND < 2.50
ND < 1.40
ND < 2.50
NA
SV-14R-0304133
03/04/2013
0.679 1
0.521
1
ND < 1.99
ND < 3.98
ND < 1.99
ND < 2.4
ND < 2.40
ND < 5.32
2.4 J
ND < 5.96
SV-14R-080513
8/5/2013
0.054 1
0.40
0.054 1
0.23
0.18
1
0.13 1
ND < 2.5
0.98
ND < 2.5
NA
SV-14R-022714
2/27/2014
0.084 1
0.24
0.042 1
0.13 J1
0.18
1
0.035 J
ND < 2.5
0.15 X
ND < 2.5
NA
SV-14R-092314
09/23/2014
0.024 1
0.073
1
ND < 0.14
0.034 J
0.013
1
NA
ND < 2.5
NA
ND < 2.5
NA
SV-14R-042815
04/28/2015
ND<0.13
ND<0.66
ND<0.66
ND<0.66
ND<0.66
NA
ND<2.S R
NA
0.50 J
NA
SV-14R-101315
10/13/2015
ND <0.14
1.7
ND <0.70
ND <0.70
ND <0.70
NA
ND <2.5
NA
ND <2.5
NA
SV14R-121015
12/10/2015
ND <170
ND <170
ND <170
ND <330
ND <170
NA
NA
NA
NA
NA
SV-14R-022916
02/29/2016
ND <0.13
0.31
1
ND <0.65
ND <0.65
ND <0.65
NA
2.3 1
NA
2.6
NA
SV-14R-041116
04/11/2016
ND <0.15
0.70
1
ND <0.73
ND <0.73
ND <0.73
NA
ND <2.5
NA
ND <2.5
NA
SV-14R-062716
06/27/2016
0.15 J
0.31
1
ND <0.84
ND <0.84
ND <0.84
NA
ND <2.5
NA
ND <2.5
NA
SV-14R-101816
10/18/2016
ND <0.16
ND <0.80
ND <0.80
2.8
1.0
1NA
ND <2.5
NA
ND <2.5
NA
SV-14R-041817
04/18/2017
ND <0.14
ND <0.69
ND <0.69
ND <0.69
ND <0.69
NA
ND <2.5
NA
ND <2.5
NA
SV-14R-100917
10/09/2017
ND <0.15
0.33
1
ND <0.77
ND <0.77
ND <0.77
NA
2.0 1
NA
0.65 1
NA

Table 2
Historical Soil Vapor Analytical Results (October 2007 through April 2019)
Poplar Tent Road Site
Plantation Pipe Line Company
Concord, Cabarrus County, North Carolina
=
m
a
w
d
d
C v1
Ill
N N
C
0C1 V1
C Ifl
W
c
ul
c
n
c
L V1
m
c
L n
M
ate+ N
Date Collected
w rl
c 0
y .ti
2 O
1ti
a 0
j. '-1
x 0
.y
T O
iy
L O
,y
► 0
'y
0/ L 0
c 'y
°/ L 0
... ei
d 0
Sample ID
a
o
>r
a�
x F
a~
ar
2 Qr
Qr
w
(MM/DD/YYYY)
m
~
t
o
m
N m
N m
�y
Z
Z
C
C
X
Rg/m3
SV-14R-041718
04/17/2018
ND <0.15
0.591
ND <0.76
ND <0.76
ND <0.76
NA
NA
NA
NA
NA
SV-14RD-0417184
04/17/2018
ND <0.15
ND <0.74
ND <0.74
ND <0.74
ND <0.74
NA
NA
NA
NA
NA
SV-14R-050318
05/03/2018
0.14 J
0.86
ND <0.85
1.81
1.0
NA
ND <2.5
NA
ND <2.5
NA
SV-14RD-0503184
05/03/2018
0.23
3.6
0.401
1.5 J
0.551
NA
ND <2.5
NA
ND <2.5
NA
SV-14R-101718
10/17/2018
0.19 J
0.16 J
ND <2.3
ND <5.0
ND <2.4
NA
ND <2.5
NA
2.31
NA
SV-14R-042419
04/24/2019
ND <2.6
ND <4.5
ND <3.5
ND <3.5
ND <3.5
NA
ND <9.47 J
NA
ND <4.27 J
NA
Soil Gas Screening Criteria
1 120
34800
374
695
695
20.9
20.9
NS
NS
695
Soil Gas Screening Criteria
120
1 35000
1 370
1 700
700
21
21
NS
NS
700
Notes:
Duplicate sample collected from SV-5R
2 Sample analyzed at ALS Environmental
3Sample analyzed at ASL/Eurofins Air Toxics
°Duplicate sample collected from SV-14R
5February 2018 North Carolina Department of Environmental Quality Division of Waste Management Residential Vapor Intrusion Screening Levels for Sub -Slab and
Exterior Soil Gas (SGSL) based on an attenuation factor of 0.03. https://files.nc.gov/ncdeq/ Waste%20Management/DWM/SF/RiskBasedRemediation/Feb2018_Res_VISLs.pdf
6USEPA Vapor Intrusion Screening Levels (VISL) Calculator (AF = 0.03), TRL = 10-5 or THQ = 0.2, accessed June 19, 2019. https://epa-visl.orni.gov/cgi-bin/visl_search
'The method detection limit is presented for samples analyzed by TO-17 in April 2019.
< - Indicates value is less than the shown reporting limit.
pg/m3 - micrograms per cubic meter
D - reported result is from a dilution
J - estimated value
R - data was rejected during validation
X - excluded. Preferred analytical method for 2-Methylnaphthalene is TO-17. See case narrative in laboratory report.
ND - not detected
NS - no soil gas screening criteria available
B - Analyte detected in both the sample and associated method blank
NA - not analyzed
AF - Attenuation Factor
TRL - Target Risk Level
THQ - Target Hazard Quotient
USEPA - United States Environmental Protection Agency
text with gray highlighting indicates exceeclance of one or more screening criteria

Figure

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= = = =
INSTALLATION VIA HDD
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0 30 60 120
APPROXIMATE SCALE IN FEET
Figure 1. Biosparging/SVE System As -Built
Poplor Tent Road Site
Plantation Pipe Line Company JACOBS®
Concord, North Carolina
KinderMorgan\358526PoplarTent\Reports\Groundwater Monitoring Reports\2018 Annual Report\Figures\CADD

Analytical Laboratory Report

JACOBS
Memorandum
14120 Ballantyne Corporate Place, Suite 200
Charlotte, North Carolina 28277
United States
T +1.704.544.4040
F +1.704.544.4041
Subject
Data Validation Summary— Plantation Pipe Line Poplar Tent Road Site
Project Name
Plantation Pipe Line Poplar Tent Road Site
Attention
Kelly Ramsey/CLT, Jacobs
Mike Skeean/CLT, Jacobs
From
Hailey Mahoney/CVO, Jacobs
Date
June 17, 2019
Copies to
Tiffany Davis/GNV, Jacobs
1. Introduction
The purpose of this memorandum is to present the results of the data validation process for the soil vapor
samples collected at the Plantation Pipe Line Company (PPL) Poplar Tent Road Site located in Concord,
North Carolina. The samples were collected on April 24t", 2019.
Samples were submitted to Eurofins TestAmerica, Knoxville in Tennessee for the following analyses:
• T015 SIM Volatiles (Laboratory SDG ID J15077)
• T017 Volatiles (Laboratory SDG ID J15280)
These data for Sample Delivery Groups (SDGs) J15077 and J15280 were validated for compliance with
the analytical method requirements. This process included a review of these data to assess the accuracy,
precision, and completeness based upon procedures described in guidance documents such as the
Environmental Protection Agency (EPA) National Functional Guidelines for Organic Data Review (EPA
2017) and the USEPA, Compendium of Methods for the Determination of Toxic Organic Compounds in
Ambient Air, Second Edition (EPA 1999). The Quality assurance/quality control (QA/QC) summary forms
and data reports were reviewed and the resulting findings are documented within each subsection that
follows.
During the data validation, if QA/QC parameters were not within the acceptance limits, associated sample
results were appended with a primary qualifying flag that indicated a possible anomaly with these data.
The qualifying flags originated during the data review and validation processes. This qualification also
included the use of secondary sub -qualifier flags. The secondary qualifiers provide the reasoning behind
the assignment of a qualifier to these data. The definitions of the primary qualifiers are presented below.
2. Validation Flag Definitions
The following primary qualifiers were used to qualify the data:
[=]: Detected. The analyte was analyzed for and detected at the concentration shown.
[J]: Estimated. The analyte was present, but the reported value may not be accurate or precise.
[U]: Undetected. The analyte was analyzed for but not detected above the method detection limit.
[UJ]: Detection limit estimated. The analyte was analyzed for but qualified as not detected; the
detection limit is estimated.

JACOBS' Data Validation Summary- Plantation Pipe Line Poplar Tent Road Site
[R]: Rejected. The data are not useable.
[X]: Excluded. Data were not used due to another value being more appropriate.
3. Organic Parameters
3.1 Quality Control Review
The following list represents the QA/QC measures that were reviewed during the data quality evaluation
procedure for organic data:
• Holding Times — The holding times are evaluated to verify that samples were extracted and
analyzed within holding times.
• Blank samples — Method blank samples were provided for this project. Blank samples enable the
reviewer to determine if an analyte may be attributed to sampling or laboratory procedures, rather
than environmental contamination from site activities.
• Surrogate Recoveries — A surrogate compound is added to each sample and the recovery is used to
monitor lab performance and possible matrix interference.
• Lab Control Sample (LCS) — These samples are a "controlled matrix", such as humidified nitrogen,
in which target compounds have been added prior to extraction/analysis. The recoveries serve as a
monitor of the overall performance of each step during the analysis, including sample preparation.
• Matrix Spike/Matrix Spike Duplicate (MS/MSD) Samples — Spike recovery is used to evaluate
potential matrix interferences, as well as accuracy. Precision information is also determined by
calculating the reproducibility between the recoveries of each spiked parameter.
• Field Duplicate Samples — These samples are collected to determine precision between a native
and its duplicate. This information can only be determined when target compounds are detected.
4. Volatile Organic Compound Analyses
The QA/QC parameters for VOC analyses by EPA Methods TO-15 and TO-17 for all samples were within
acceptable control limits with the exceptions listed below. A brief overview of the data evaluation follows:
4.1 Holding Times (and Sample Receipt)
All holding time requirements were met.
The temperature blank included in the shipment with samples collected for Method TO-17 was measured
at 7.5° C, upon receipt at the laboratory, exceeding the method criteria of <4° C and National Functional
Guidelines for Organic Data Review criteria for VOC analyses of <6° C. Associated target analytes have
been flagged `UJ:TEMP' for non -detects (< MDL threshold) and `J:TEMP' for quantitation greater than the
laboratory's MDL threshold.
4.2 Analytical Blanks
No target analytes were detected in the blanks.
4.3 Recoveries — Surrogates, MS/MSD, LCS/LCSD
Surrogates and LCS/LCSD recoveries all met acceptance criteria. A MS/MSD set was not collected for
this event.
4.4 Field Duplicates
Duplicate field samples were collected and submitted to the laboratory for analysis. There are two
conditions under which the native and field duplicate are deemed outside acceptance criteria. For
condition one, if a result for the native and field duplicate are less than five times the reporting limit, the
two results must be within one times the reporting limit to meet acceptance criteria. In condition two, if the
result is greater than five times the reporting limit, the two results must agree to within 20 percent relative
percent difference to meet acceptance criteria. All acceptance criteria were met.

Data Validation Summary— Plantation Pipe Line Poplar Tent Road Site JACOBS
5. PARCC
Precision is defined as the agreement between duplicate results, and was estimated by comparing
duplicate LCS recoveries, and field duplicate sample results. The precision between the native and field
duplicate sample results for all analyses were within acceptable criteria indicating that the sample matrix
did not interfere with the overall analytical process.
Accuracy is a measure of the agreement between an experimental determination and the true value of
the parameter. In the case of VOC analysis, each of the samples were spiked with a surrogate compound
with a known concentration before preparation. The surrogate data provides a measure of the matrix
effects as they may affect accuracy and precision of the analytical method. The LCS results demonstrate
accuracy of the method. Spike recoveries were within the method acceptance limits, showing no evidence
of matrix interferences that affect the usability of the data.
Representativeness criteria are a qualitative measure of the degree to which sample data accurately
and precisely represent a characteristic environmental condition. Representativeness is a subjective
parameter and is used to evaluate the efficacy of the sampling plan design. Representativeness was
demonstrated by providing full descriptions in the project scoping documents of the sampling techniques
and the rationale used for selecting sampling locations.
Comparability is another qualitative measure designed to express the confidence with which one data
set may be compared to another. Factors that affect comparability are sample collection and handling
techniques, sample matrix type, and analytical method. Comparability is limited by the other PARCC
parameters because data sets can be compared with confidence only when precision and accuracy are
known. Data from this investigation are comparable with other previous data collected at the site due to
the laboratories use of EPA or appropriate methods to analyze the samples and supported by the results
of the laboratory's analytical reports.
Completeness is defined as the percentage of measurements that are judged to be valid compared to
the total number of measurements made. There were no data rejected and or seen as not usable due to
quality control or sampling issues.
6. Conclusion
A review of the laboratory's analytical data submitted regarding the investigation of PPL Poplar Tent Road
soil vapor sampling event in April 2019 by Jacobs has been completed. The validation demonstrated that
the analytical systems were in control at the time of sample analyses and all data results can be used in
the decision -making process as qualified by the data validation process.

urofins
Environment Testing
TestAmerica
ANALYTICAL REPORT
Eurofins TestAmerica, Knoxville
5815 Middlebrook Pike
Knoxville, TN 37921
Tel: [phone]
Laboratory Job ID: 140-15077-1
Client Project/Site: Poplar Tent Road
CH2M Hill, Inc.
14120 Ballantyne Corporate Place
Suite 200
Charlotte, North Carolina 28277
Attn: Mike Skeean
Dw bm(�y
Authorized for release by:
51812019 10:53:13 AM
Diana Lange, Project Management Assistant II
[e-mail]
Designee for
Jamie McKinney, Senior Project Manager
[phone]
[e-mail]
The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited
parameters, exceptions are noted in this report. This report may not be reproduced except in full,
and with written approval from the laboratory. For questions please contact the Project Manager
at the e-mail address or telephone number listed on this page.
This report has been electronically signed and authorized by the signatory. Electronic signature is
intended to be the legally binding equivalent of a traditionally handwritten signature.
Results relate only to the items tested and the sample(s) as received by the laboratory.

Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Table of Contents
Laboratory Job ID: 140-15077-1
CoverPage ..............................................
1
Table of Contents .........................................
2
Definitions/Glossary.......................................
3
Case Narrative ...........................................
4
Detection Summary ........................................
5
Client Sample Results ......................................
6
Default Detection Limits ....................................
9
Surrogate Summary .......................................
10
QC Sample Results ........................................
11
QC Association Summary ...................................
13
Lab Chronicle ............................................
14
Certification Summary ......................................
16
Method Summary .........................................
17
Sample Summary .........................................
18
Chain of Custody ..........................................
19
Receipt Checklists .........................................
21
Eurofins TestAmerica, Knoxville
Page 2 of 21 5/8/2019

Definitions/Glossary
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Qualifiers
Air - GUMS VOA
Qualifier Qualifier Description
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.
Glossary
Abbreviation These commonly used abbreviations may or may not be present in this report.
Listed under the "D" column to designate that the result is reported on a dry weight basis
%R Percent Recovery
CFL Contains Free Liquid
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
PQL Practical Quantitation Limit
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
Job ID: 140-15077-1
Eurofins TestAmerica, Knoxville
Page 3 of 21 5/8/2019

Case Narrative
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15077-1
Laboratory: Eurofins TestAmerica, Knoxville
Narrative
Job ID: 140-15077-1
0
Job Narrative
140-15077-1
Comments
No additional comments.
Receipt
The samples were received on 4/25/2019 9:00 AM; the samples arrived in good condition, properly preserved and, where required, on ice
Air - GC/MS VOA
Method(s) TO 15 LL, TO-14A, TO-15: EPA methods TO-14A and TO-15 specify the use of humidified "zero air" as the blank reagent for
canister cleaning, instrument calibration and sample analysis. Ultra -high purity humidified nitrogen from a cryogenic reservoir is used in
place of "zero air" by TestAmerica Knoxville.
No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.
Eurofins TestAmerica, Knoxville
Page 4 of 21 5/8/2019

Detection Summary
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Client Sample ID: SV-12R-042419
Analyte Result
Qualifier
m-Xylene & p-Xylene 0.68
J
o-Xylene 0.35
J
Analyte Result
Qualifier
m-Xylene & p-Xylene 2.9
J
o-Xylene 1.5
J
Client Sample ID: SV-14R-042419
F
Job ID: 140-15077-1
Lab Sample ID: 140-15077-1
RL
MDL
Unit
Dil Fac D Method Prep Type
0.80
0.53
ppb v/v
1 TO 15 LL Total/NA
0.80
0.24
ppb v/v
1 TO 15 LL Total/NA
RL
MDL
Unit
Dil Fac D Method Prep Type
3.5
2.3
ug/m3
1 TO 15 LL Total/NA
3.5
1.0
ug/m3
1 TO 15 LL Total/NA
Lab Sample ID: 140-15077-2
ENo Detections.
Client Sample ID: SV-10R2-042419 Lab Sample ID: 140-15077-3
ENo Detections. F
Client Sample ID: SV-5R-042419 Lab Sample ID: 140-15077-4
1 No Detections.
Client Sample ID: SV-5RD-042419 Lab Sample ID: 140-15077-5
INo Detections
This Detection Summary does not include radiochemical test results.
Page 5 of 21
Eurofins TestAmerica, Knoxville
5/8/2019

Client Sample Results
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15077-1
Client Sample ID: SV-12R-042419 Lab Sample ID: 140-15077-1
Date Collected: 04/24/19 09:34 Matrix: Air
Date Received: 04/25/19 09:00
Sample Container: Summa Canister 1 L
Method: TO 15 LL - Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS)
Analyte
Result
Qualifier
RL
MDL
Unit
D Prepared Analyzed
Dil Fac
Benzene
ND
0.80
0.23
ppb v/v
05/02/19 18:20
1
Ethylbenzene
ND
0.80
0.27
ppb v/v
05/02/19 18:20
1
Toluene
ND
1.2
1.2
ppb v/v
05/02/19 18:20
1
m-Xylene & p-Xylene
0.68
J
0.80
0.53
ppb v/v
05/02/19 18:20
1
o-Xylene
0.35
J
0.80
0.24
ppb v/v
05/02/19 18:20
1
Analyte
Result
Qualifier
RL
MDL
Unit
D Prepared Analyzed
Dil Fac
Benzene
ND
2.6
0.73
ug/m3
05/02/19 18:20
1
Ethylbenzene
ND
3.5
1.2
ug/m3
05/02/19 18:20
1
Toluene
ND
4.5
4.5
ug/m3
05/02/19 18:20
1
m-Xylene & p-Xylene
2.9
J
3.5
2.3
ug/m3
05/02/19 18:20
1
o-Xylene
1.5
J
3.5
1.0
ug/m3
05/02/19 18:20
1
Surrogate %Recovery Qualifier Limits
4-Bromofluorobenzene (Surr) 106 60 - 140
Prepared Analyzed Dil Fac
05102119 18:20 1
Client Sample ID: SV-14R-042419 Lab Sample ID: 140-15077-2
Date Collected: 04/24/19 10:29 Matrix: Air
Date Received: 04/25/19 09:00
Sample Container: Summa Canister 1 L
Method: TO 15 LL - Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS)
Analyte
Result Qualifier
RL
MDL
Unit D Prepared
Benzene
ND
0.80
0.23
ppb v/v
Ethylbenzene
ND
0.80
0.27
ppb v/v
Toluene
ND
1.2
1.2
ppb v/v
m-Xylene & p-Xylene
ND
0.80
0.53
ppb v/v
o-Xylene
ND
0.80
0.24
ppb v/v
Analyte
Benzene
Ethylbenzene
Toluene
m-Xylene & p-Xylene
o-Xylene
Surrogate
4-Bromofluorobenzene (Surr)
Analyzed Dil Fac
05/01/19 05:05 1
05/01/19 05:05 1
05/01/19 05:05 1
05/01/19 05:05 1
05/01/19 05:05 1
Result Qualifier
RL
MDL
Unit
D Prepared Analyzed
Dil Fac
ND
2.6
0.73
ug/m3
05/01/19 05:05
1
ND
3.5
1.2
ug/m3
05/01/19 05:05
1
ND
4.5
4.5
ug/m3
05/01/19 05:05
1
ND
3.5
2.3
ug/m3
05/01/19 05:05
1
ND
3.5
1.0
ug/m3
05/01/19 05:05
1
%Recovery Qualifier
Limits
Prepared Analyzed
Dil Fac
90
60 - 140
05101119 05:05
1
Client Sample ID: SV-10R2-042419 Lab Sample ID: 140-15077-3
Date Collected: 04/24/19 13:01 Matrix: Air
Date Received: 04/25/19 09:00
Sample Container: Summa Canister 1 L
Method: TO 15 LL - Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS)
Analyte Result Qualifier RL MDL Unit D Prepared
Analyzed
Dil Fac
Benzene
ND
0.80
0.23
ppb v/v
05/01/19 05:57
1
Ethylbenzene
ND
0.80
0.27
ppb v/v
05/01/19 05:57
1
Toluene
ND
1.2
1.2
ppb v/v
05/01/19 05:57
1
m-Xylene & p-Xylene
ND
0.80
0.53
ppb v/v
05/01/19 05:57
1
o-Xylene
ND
0.80
0.24
ppb v/v
05/01/19 05:57
1
HPM 05/23/19
Eurofins TestAmerica, Knoxville
Page 6 of 21 5/8/2019

Client Sample Results
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15077-1
Client Sample ID: SV-10R2-042419 Lab Sample ID: 140-15077-3
Date Collected: 04/24/19 13:01 Matrix: Air
Date Received: 04/25/19 09:00
Sample Container: Summa Canister 1 L
Analyte
Result
Qualifier
RL
MDL
Unit
D Prepared
Analyzed
Dil Fac
Benzene
ND
2.6
0.73
ug/m3
05/01/19 05:57
1
Ethylbenzene
ND
3.5
1.2
ug/m3
05/01/19 05:57
1
Toluene
ND
4.5
4.5
ug/m3
05/01/19 05:57
1
m-Xylene & p-Xylene
ND
3.5
2.3
ug/m3
05/01/19 05:57
1
o-Xylene
ND
3.5
1.0
ug/m3
05/01/19 05:57
1
Surrogate
%Recovery
Qualifier
Limits
Prepared
Analyzed
Dil Fac
4-Bromofluorobenzene (Surr)
90
60 - 140
05101119 05:57
1
Client Sample ID: SV-5R-042419
Lab Sample
ID: 140-15077-4
Date Collected: 04/24/19 13:31
Matrix:
Air
Date Received: 04/25/19 09:00
Sample Container: Summa Canister 1 L
Method: TO 15 LL - Volatile Organic Compounds
in
Ambient Air, Low Concentration (GC/MS)
Analyte
Result
Qualifier
RL
MDL
Unit
D Prepared
Analyzed
Dil Fac
Benzene
ND
0.80
0.23
ppb v/v
05/01/19 06:50
1
Ethylbenzene
ND
0.80
0.27
ppb v/v
05/01/19 06:50
1
Toluene
ND
1.2
1.2
ppb v/v
05/01/19 06:50
1
m-Xylene & p-Xylene
ND
0.80
0.53
ppb v/v
05/01/19 06:50
1
o-Xylene
ND
0.80
0.24
ppb v/v
05/01/19 06:50
1
Analyte
Result
Qualifier
RL
MDL
Unit
D Prepared
Analyzed
Dil Fac
Benzene
ND
2.6
0.73
ug/m3
05/01/19 06:50
1
Ethylbenzene
ND
3.5
1.2
ug/m3
05/01/19 06:50
1
Toluene
ND
4.5
4.5
ug/m3
05/01/19 06:50
1
m-Xylene & p-Xylene
ND
3.5
2.3
ug/m3
05/01/19 06:50
1
o-Xylene
ND
3.5
1.0
ug/m3
05/01/19 06:50
1
Surrogate
%Recovery
Qualifier
Limits
Prepared
Analyzed
Dil Fac
4-Bromofluorobenzene (Surr)
80
60 - 140
05101119 06:50
1
Client Sample ID: SV-5RD-042419
Lab Sample
ID: 140-15077-5
Date Collected: 04/24/19 13:31
Matrix:
Air
Date Received: 04/25/19 09:00
Sample Container: Summa Canister 1 L
Method: TO 15 LL - Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS)
Analyte
Result Qualifier
RL
MDL
Unit D Prepared
Analyzed
Dil Fac
Benzene
ND
0.80
0.23
ppb v/v
05/01/19 07:42
1
Ethylbenzene
ND
0.80
0.27
ppb v/v
05/01/19 07:42
1
Toluene
ND
1.2
1.2
ppb v/v
05/01/19 07:42
1
m-Xylene & p-Xylene
ND
0.80
0.53
ppb v/v
05/01/19 07:42
1
o-Xylene
ND
0.80
0.24
ppb v/v
05/01/19 07:42
1
Analyte
Result Qualifier
RL
MDL
Unit D Prepared
Analyzed
Dil Fac
Benzene
ND
2.6
0.73
ug/m3
05/01/19 07:42
1
Ethylbenzene
ND
3.5
1.2
ug/m3
05/01/19 07:42
1
Toluene
ND
4.5
4.5
ug/m3
05/01/19 07:42
1
m-Xylene & p-Xylene
ND
3.5
2.3
ug/m3
05/01/19 07:42
1
o-Xylene
ND
3.5
1.0
ug/m3
05/01/19 07:42
1
HPM 05/23/19 Eurofins TestAmerica, Knoxville
Page 7 of 21 5/8/2019

Client Sample Results
Client: CH21VI Hill, Inc. Job ID: 140-15077-1
Project/Site: Poplar Tent Road
Client Sample ID: SV-5RD-042419 Lab Sample ID: 140-15077-5
Date Collected: 04/24/19 13:31 Matrix: Air
Date Received: 04/25/19 09:00
Sample Container: Summa Canister 1 L
Surrogate %Recovery Qualifier Limits Prepared Analyzed DU Fac
4-Bromofluorobenzene (Surr) 70 60 - 140 05101119 07:42 1
1k,
Im
I■ Nl
m
HPM 05/23/19 Eurofins TestAmerica, Knoxville
Page 8 of 21 5/8/2019

Default Detection Limits
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15077-1
Method: TO 15 LL - Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS)
Analyte
RL
MDL
Units
Benzene
0.080
0.023
ppb v/v
Benzene
0.26
0.073
ug/m3
Ethylbenzene
0.080
0.027
ppb v/v
Ethylbenzene
0.35
0.12
ug/m3
m-Xylene & p-Xylene
0.080
0.053
ppb v/v
m-Xylene & p-Xylene
0.35
0.23
ug/m3
o-Xylene
0.080
0.024
ppb v/v
o-Xylene
0.35
0.10
ug/m3
Toluene
0.12
0.12
ppb v/v
Toluene
0.45
0.45
ug/m3
Eurofins TestAmerica, Knoxville
Page 9 of 21 5/8/2019

Surrogate Summary
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15077-1
Method: TO 15 LL - Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS)
Matrix: Air Prep TVDe: Total/NA
BFB
Lab Sample ID
Client Sample ID
(60-140)
140-15077-1
SV-12R-042419
106
140-15077-2
SV-14R-042419
90
140-15077-3
SV-10R2-042419
90
140-15077-4
SV-5R-042419
80
140-15077-5
SV-5RD-042419
70
LCS 140-29518/1002
Lab Control Sample
92
LCS 140-29714/1002
Lab Control Sample
105
MB 140-29518/5
Method Blank
87
MB 140-29714/5
Method Blank
104
Surrogate Legend
BFB = 4-Bromofluorobenzene (Surr)
Percent Surrogate Recovery (Acceptance Limits)
0
Eurofins TestAmerica, Knoxville
Page 10 of 21 5/8/2019

QC Sample Results
Client: CH2M Hill, Inc.
Job ID: 140-15077-1
Project/Site: Poplar Tent Road
Method: TO 15 LL - Volatile Organic
Compounds
in Ambient Air, Low Concentration (GC/MS)
Lab Sample ID: MB 140-29518/5
Client Sample
ID: Method Blank
Matrix: Air
Prep Type: Total/NA
Analysis Batch: 29518
MB
MB
Analyte
Result
Qualifier
RL
MDL
Unit D
Prepared
Analyzed Dil Fac
Benzene
ND
0.080
0.023
ppb v/v
04/30/19 12:39 1
Ethylbenzene
ND
0.080
0.027
ppb v/v
04/30/19 12:39 1
Toluene
ND
0.12
0.12
ppb v/v
04/30/19 12:39 1
m-Xylene & p-Xylene
ND
0.080
0.053
ppb v/v
04/30/19 12:39 1
o-Xylene
ND
0.080
0.024
ppb v/v
04/30/19 12:39 1
MB
MB
Analyte
Result
Qualifier
RL
MDL
Unit D
Prepared
Analyzed Dil Fac
Benzene
ND
0.26
0.073
ug/m3
04/30/19 12:39 1
Ethylbenzene
ND
0.35
0.12
ug/m3
04/30/19 12:39 1
Toluene
ND
0.45
0.45
ug/m3
04/30/19 12:39 1
m-Xylene & p-Xylene
ND
0.35
0.23
ug/m3
04/30/19 12:39 1
o-Xylene
ND
0.35
0.10
ug/m3
04/30/19 12:39 1
MB
MB
Surrogate %Recovery
Qualifier
Limits
Prepared
Analyzed Dil Fac
4-Bromofluorobenzene (Surr)
87
60
- 140
04/30/19 12 1
Lab Sample ID: LCS 140-29518/1002
Client Sample ID:
Lab Control Sample
Matrix: Air
Prep Type: Total/NA
Analysis Batch: 29518
Spike
LCS LCS
%Rec.
Analyte
Added
Result Qualifier
Unit
D %Rec
Limits
Benzene
1.00
0.964
ppb v/v
96
70 -130
Ethylbenzene
1.00
0.903
ppb v/v
90
70 -130
Toluene
1.00
0.941
ppb v/v
94
70 -130
m-Xylene & p-Xylene
2.00
1.90
ppb v/v
95
70 -130
o-Xylene
1.00
0.905
ppb v/v
90
70 -130
Spike
LCS LCS
%Rec.
Analyte
Added
Result Qualifier
Unit
D %Rec
Limits
Benzene
3.2
3.08
ug/m3
96
70 -130
Ethylbenzene
4.3
3.92
ug/m3
90
70 -130
Toluene
3.8
3.54
ug/m3
94
70 -130
m-Xylene & p-Xylene
8.7
8.25
ug/m3
95
70 -130
o-Xylene
4.3
3.93
ug/m3
90
70 -130
LCS LCS
Surrogate %Recovery Qualifier Limits
4-Bromofluorobenzene (Surr) 92 60 - 140
Lab Sample ID: MB 140-29714/5 Client Sample ID: Method Blank
Matrix: Air Prep Type: Total/NA
Analysis Batch: 29714
MB MB
Analyte Result Qualifier
Benzene ND
Ethylbenzene ND
Toluene ND
m-Xylene & p-Xylene ND
o-Xylene ND
RL
MDL
Unit
D Prepared Analyzed
Dil Fac
0.080
0.023
ppb v/v
05/02/19 15:35
1
0.080
0.027
ppb v/v
05/02/19 15:35
1
0.12
0.12
ppb v/v
05/02/19 15:35
1
0.080
0.053
ppb v/v
05/02/19 15:35
1
0.080
0.024
ppb v/v
05/02/19 15:35
1
Page 11 of 21
Eurofins TestAmerica, Knoxville
5/8/2019

QC Sample Results
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15077-1
Method: TO 15 LL - Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS)
(Continued)
MB MB
Analyte Result Qualifier
Benzene ND
Ethylbenzene ND
Toluene ND
m-Xylene & p-Xylene ND
o-Xylene ND
MB MB
Surrogate %Recovery Qualifier
4-Bromofluorobenzene (Surr) 104
Lab Sample ID: LCS 140-29714/1002
Matrix: Air
Analysis Batch: 29714
Analyte
Benzene
Ethylbenzene
Toluene
m-Xylene & p-Xylene
o-Xylene
Analyte
Benzene
Ethylbenzene
Toluene
m-Xylene & p-Xylene
o-Xylene
Surrogate
4-Bromofluorobenzene (Surr)
RL
MDL
Unit
D
Prepared
Analyzed
Dil Fac
0.26
0.073
ug/m3
05/02/1915:35
1
0.35
0.12
ug/m3
05/02/1915:35
1
0.45
0.45
ug/m3
05/02/1915:35
1
0.35
0.23
ug/m3
05/02/1915:35
1
0.35
0.10
ug/m3
05/02/1915:35
1
Limits
Prepared
Analyzed
Dil Fac
60 - 140
05102119 15: 35
1
•
Client
Sample ID:
Lab Control Sample
Prep Type: Total/NA
Spike
LCS
LCS
%Rec.
Added
Result
Qualifier
Unit
D %Rec
Limits
1.00
1.02
ppb v/v
102
70 -130
1.00
1.01
ppb v/v
101
70 -130
1.00
1.00
ppb v/v
100
70 -130
2.00
2.05
ppb v/v
102
70 -130
1.00
1.02
ppb v/v
102
70 -130
Spike
LCS
LCS
%Rec.
Added
Result
Qualifier
Unit
D %Rec
Limits
3.2
3.26
ug/m3
102
70 -130
4.3
4.37
ug/m3
101
70 -130
3.8
3.77
ug/m3
100
70 -130
8.7
8.90
ug/m3
102
70 -130
4.3
4.44
ug/m3
102
70 -130
LCS LCS
%Recovery Qualifier Limits
105 60-140
Page 12 of 21
Eurofins TestAmerica, Knoxville
5/8/2019

QC Association Summary
Client: CH21VI Hill, Inc.
Job ID: 140-15077-1
Project/Site: Poplar Tent
Road
Air - GUMS VOA
Analysis Batch: 29518
Lab Sample ID
Client Sample ID
Prep Type
Matrix
Method Prep Batch
140-15077-2
SV-14R-042419
Total/NA
Air
TO 15 LL
140-15077-3
SV-10R2-042419
Total/NA
Air
TO 15 LL
140-15077-4
SV-5R-042419
Total/NA
Air
TO 15 LL
140-15077-5
SV-5RD-042419
Total/NA
Air
TO 15 LL
MB 140-29518/5
Method Blank
Total/NA
Air
TO 15 LL
LCS 140-29518/1002
Lab Control Sample
Total/NA
Air
TO 15 LL
Analysis Batch: 29714
Lab Sample ID
Client Sample ID
Prep Type
Matrix
Method Prep Batch
140-15077-1
SV-12R-042419
Total/NA
Air
TO 15 LL
MB 140-29714/5
Method Blank
Total/NA
Air
TO 15 LL
LCS 140-29714/1002
Lab Control Sample
Total/NA
Air
TO 15 LL
m
Eurofins TestAmerica, Knoxville
Page 13 of 21 5/8/2019

Lab Chronicle
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Client Sample ID: SV-12R-042419
Date Collected: 04/24/19 09:34
Date Received: 04/25/19 09:00
Job ID: 140-15077-1
Lab Sample ID: 140-15077-1
Matrix: Air
F Batch Batch Dil Initial Final Batch Prepared
Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab
Total/NA Analysis TO 15 LL 1 50 mL 500 mL 29714 05/02/19 18:20 S1K TAL KNX
Instrument ID: MR
Client Sample ID: SV-14R-042419
Date Collected: 04/24/19 10:29
Date Received: 04/25/19 09:00
Batch Batch
Prep Type Type Method
Total/NA Analysis TO 15 LL
Instrument ID: MH
Lab Sample ID: 140-15077-2
Matrix: Air
Dil
Run Factor
Initial
Amount
Final
Amount
Batch
Number
Prepared
or Analyzed Analyst Lab
1
50 mL
500 ­mL
29518
05/01/19 05:05 S1K TAL KNX
Client Sample ID: SV-10R2-042419
Date Collected: 04/24/19 13:01
Date Received: 04/25/19 09:00
Batch Batch Dil Initial
Prep Type Type Method Run Factor Amount
Total/NA Analysis TO 15 LL 1 50 mL
Instrument ID: MH
Client Sample ID: SV-5R-042419
Date Collected: 04/24/19 13:31
Date Received: 04/25/19 09:00
Batch Batch
Prep Type Type Method Run
Total/NA Analysis TO 15 LL
Instrument ID: MH
Client Sample ID: SV-5RD-042419
Date Collected: 04/24/19 13:31
Date Received: 04/25/19 09:00
F Batch Batch
Prep Type Type Method Run
Total/NA Analysis TO 15 LL
Instrument ID: MH
Client Sample ID: Method Blank
Date Collected: N/A
Date Received: N/A
Lab Sample ID: 140-15077-3 m
Matrix: Air
Final Batch Prepared
Amount Number or Analyzed Analyst Lab
500 ­mL 29518 05/01/19 05:57 S1K TAL KNX
Lab Sample ID: 140-15077-4
Matrix: Air
Dil Initial Final Batch Prepared
Factor Amount Amount Number or Analyzed Analyst Lab
1 50 mL 500 mL 29518 05/01/19 06:50 S1K TAL KNX
Lab Sample ID: 140-15077-5
Matrix: Air
Dil Initial Final Batch Prepared
Factor Amount Amount Number or Analyzed Analyst Lab
1 50 mL 500 mL 29518 05/01/19 07:42 S1K TAL KNX
Lab Sample ID: MB 140-29518/5
Matrix: Air
Batch Batch Dil Initial Final Batch Prepared
Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab
Total/NA Analysis TO 15 LL 1 500 mL 500 mL 29518 04/30/19 12:39 S1K TAL KNX
Instrument ID: MH
Page 14 of 21
Eurofins TestAmerica, Knoxville
5/8/2019

Lab Chronicle
Client: CH21VI Hill, Inc.
Job ID: 140-15077-1
Project/Site: Poplar Tent Road
Client Sample ID: Method Blank
Lab Sample ID: MB 140-29714/5
Date Collected: N/A
Matrix: Air
Date Received: N/A
Batch Batch
Dil
Initial
Final Batch Prepared
Prep Type Type Method Run
Factor
Amount
Amount Number or Analyzed Analyst Lab
Total/NA Analysis TO 15 LL
1
500 mL
500 mL 29714 05/02/19 15:35 S1K TAL KNX
Instrument ID: MR
Client Sample ID: Lab Control Sample
Lab Sample ID: LCS 140-29518/1002
Date Collected: N/A
Matrix: Air
Date Received: N/A
Batch Batch
Dil
Initial
Final Batch Prepared
Prep Type Type Method Run
Factor
Amount
Amount Number or Analyzed Analyst Lab
Total/NA Analysis TO 15 LL
1
500 mL
500 mL 29518 04/30/19 09:46 S1K TAL KNX
Instrument ID: MH
Client Sample ID: Lab Control Sample
Lab Sample ID: LCS 140-29714/1002 m
Date Collected: N/A
Matrix: Air
Date Received: N/A
Batch Batch
Dil
Initial
Final Batch Prepared
Prep Type Type Method Run
Factor
Amount
Amount Number or Analyzed Analyst Lab
Total/NA Analysis TO 15 LL
1
500 mL
500 mL 29714 05/02/19 11:32 S1K TAL KNX
Instrument ID: MR
Laboratory References:
TAL KNX = Eurofins TestAmerica, Knoxville, 5815 Middlebrook
Pike, Knoxville, TN 37921, TEL [phone]
Eurofins TestAmerica, Knoxville
Page 15 of 21 5/8/2019

Accreditation/Certification Summary
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Laboratory: Eurofins TestAmerica, Knoxville
All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report.
Job ID: 140-15077-1
Authority
Program
EPA Region
Identification Number
Expiration Date
AFCEE
N/A
ANAB
DoD
L2311
02-13-22
ANAB
DoD
L2311.01
02-13-22
Arkansas DEQ
State Program
6
88-0688
06-16-20
California
State Program
9
2423
06-30-19
Colorado
State Program
8
TN00009
02-28-20
Connecticut
State Program
1
PH-0223
09-30-19
Florida
NELAP
4
E87177
06-30-19
Georgia
State Program
4
906
04-13-20
Hawaii
State Program
9
N/A
04-13-20
Kansas
NELAP
7
E-10349
10-31-19
Kentucky (DW)
State Program
4
90101
12-31-19
Louisiana
NELAP
6
83979
06-30-19
Louisiana (DW)
NELAP
6
LA160005
12-31-19
Maryland
State Program
3
277
03-31-20
Michigan
State Program
5
9933
04-13-20
Nevada
State Program
9
TN00009
07-31-19
New Hampshire
NELAP
1
2999
01-17-20
New Jersey
NELAP
2
TN001
06-30-19
New York
NELAP
2
10781
03-31-20
North Carolina (DW)
State Program
4
21705
07-31-19
North Carolina (WW/SW)
State Program
4
64
12-31-19
Ohio VAP
State Program
5
CL0059
08-28-20
Oklahoma
State Program
6
9415
08-31-19
Oregon
NELAP
10
TNIO189
06-30-19
Pennsylvania
NELAP
3
68-00576
12-31-19
Tennessee
State Program
4
2014
04-13-20
Texas
NELAP
6
T104704380-16-9
08-31-19
US Fish & Wildlife
Federal
LE-058448-0
07-31-19
USDA
Federal
P330-16-00262
08-20-19
Utah
NELAP
8
TN00009
07-31-19
Virginia
NELAP
3
460176
09-14-19
Washington
State Program
10
C593
01-19-20
West Virginia (DW)
State Program
3
9955C
12-31-19
West Virginia DEP
State Program
3
345
04-30-20
Wisconsin
State Program
5
998044300
08-31-19
Eurofins TestAmerica, Knoxville
Page 16 of 21 5/8/2019

Method Summary
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Method Method Description Protocol
TO 15 LL Volatile Organic Compounds in Ambient Air, Low Concentration (GC/MS) EPA
Protocol References:
EPA = US Environmental Protection Agency
Laboratory References:
TAL KNX = Eurofins TestAmerica, Knoxville, 5815 Middlebrook Pike, Knoxville, TN 37921, TEL [phone]
F
Job ID: 140-15077-1
Laboratory
TAL KNX
L
Eurofins TestAmerica, Knoxville
Page 17 of 21 5/8/2019

Sample Summary
Client: CH21VI Hill, Inc.
Job ID: 140-15077-1
Project/Site: Poplar Tent Road
Lab Sample ID
Client Sample ID
Matrix
Collected
Received
140-15077-1
SV-12R-042419
Air
04/24/19 09:34
04/25/19 09:00
140-15077-2
SV-14R-042419
Air
04/24/19 10:29
04/25/19 09:00
140-15077-3
SV-10R2-042419
Air
04/24/19 13:01
04/25/19 09:00
140-15077-4
SV-5R-042419
Air
04/24/19 13:31
04/25/19 09:00
140-15077-5
SV-5RD-042419
Air
04/24/19 13:31
04/25/19 09:00
14
Eurofins TestAmerica, Knoxville
Page 18 of 21 5/8/2019

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Page 20 of 21
5/8/2019

Gauge ID:
Date:
G5
4/25/2019
TestAmerica Knoxville - Air Canister Initial Pressure Check
Analyst
Sample ID
Asset #
Cleaning
Job
Cert
Size
(L)
Pressure @
Receipt
(-in Hg or +psig)
Time
Comments
HMT
140-15077-a-1
11285
14823
B
1
-5.2
17:23
HMT
140-15077-a-2
11762
14823
B
1
1 -5.0
17:24
HMT
140-15077-a-3
11720
14823
B
1
-5.0
17:25
HMT
140-15077-a-4
09735
14789
B
1
-4.7
17:26
HMT
140-15077-a-5
10742
14823
B
1
-4.1
17:27
❑ Receiving —Air Can —Calve Open (NCM # )
❑ Air - Can P -24 to -25 " - Flow Contr. Works (NCM# )
❑ Air - Can P -24 to -25 " - Flow Contr. Faulty (NCM# )
❑ Air - Can P Out -26" - Flow Contr. Works (NCM# )
❑ Air - Can P Out -26" - Flow Comr. Faulty (NCM# )
❑ Air - Can P Low -24 to -25 " - Grab Sample (NCM# )
❑ Air - Can P Low -26 "- Grab Sample (NCM# )
16
I EARBM11V&JI�
Page 21 of 21
MS038 r14, 6/19/15
5/8/2019

urofins
Environment Testing
TestAmerica
ANALYTICAL REPORT
Eurofins TestAmerica, Knoxville
5815 Middlebrook Pike
Knoxville, TN 37921
Tel: [phone]
Laboratory Job ID: 140-15280-1
Laboratory Sample Delivery Group: WO 1904598
Client Project/Site: Poplar Tent Road
Revision: 2
For:
CH2M Hill, Inc.
14120 Ballantyne Corporate Place
Suite 200
Charlotte, North Carolina 28277
Attn: Mike Skeean
t, 0 - Kcl- -; f �-
Authorized for release by.
611712019 8:27:51 AM
Jamie McKinney, Senior Project Manager
[phone]
[e-mail]
The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited
parameters, exceptions are noted in this report. This report may not be reproduced except in full,
and with written approval from the laboratory. For questions please contact the Project Manager
at the e-mail address or telephone number listed on this page.
This report has been electronically signed and authorized by the signatory. Electronic signature is
intended to be the legally binding equivalent of a traditionally handwritten signature.
Results relate only to the items tested and the sample(s) as received by the laboratory.

Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Table of Contents
Laboratory Job ID: 140-15280-1 C
SDG: WO 1904598
Cover Page ..............................................
1
Table of Contents .........................................
2
Definitions/Glossary.......................................
3 L
Case Narrative ...........................................
4
Detection Summary ........................................
5
Client Sample Results ......................................
6
Surrogate Summary .......................................
7
QC Sample Results ........................................
8
QC Association Summary ...................................
9
Lab Chronicle ............................................
10
Certification Summary ......................................
12
Method Summary .........................................
13
Sample Summary .........................................
14
Chain of Custody ..........................................
15
Receipt Checklists .........................................
16
Eurofins TestAmerica, Knoxville
Page 2 of 16 6/17/2019 (Rev. 2)

Definitions/Glossary
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Qualifiers
Subcontract
Qualifier Qualifier Description
U COMPOUND ANALYZED FOR BUT NOT DETECTED ABOVE THE DETECTION LIMIT
Glossary
Abbreviation These commonly used abbreviations may or may not be present in this report.
Listed under the "D" column to designate that the result is reported on a dry weight basis
%R Percent Recovery
CFL Contains Free Liquid
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
PQL Practical Quantitation Limit
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
Job ID: 140-15280-1
SDG: WO 1904598
Eurofins TestAmerica, Knoxville
Page 3 of 16 6/17/2019 (Rev. 2)

Case Narrative
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15280-1
SDG: WO 1904598
Job ID: 140-15280-1
Laboratory: Eurofins TestAmerica, Knoxville
Narrative
Job Narrative
140-15280-1
REVISED
REVISED 06/17/19
Comments
This report has been revised. The sample IDs and collection times have been corrected.
06111119 - This report has been revised. Results have been reported to the Method Detection Limit (MDL).
Receipt
Five TO-17 Tube (Tenax-TA) BC samples were received on April 26, 2019.
Sample identifications for samples SV-12R-042419, SV-14R-042419, SV-10R2-042419, SV-5R-042419, and SV-5RD-042419 were not
provided on the sample tags. Identification was based by matching the tube number between the Chain of Custody and the information on
the tubes.
A Temperature Blank was included with the shipment. Temperature was measured and was not within 4±2 'C. Coolant in the form of blue
ice was present. Analysis proceeded.
T017
A sampling volume of 0.200 L was used to convert ng to ug/m3 for the associated Lab Blank.
No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.
Eurofins TestAmerica, Knoxville
Page 4 of 16 6/17/2019 (Rev. 2)

Detection Summary
Client: CH21VI Hill, Inc.
Job ID: 140-15280-1
Project/Site: Poplar Tent Road
SDG: WO 1904598
Client Sample ID: SV-12R-042419
Lab Sample ID: 140-15280-1
ENo Detections.
Client Sample ID: SV-14R-042419
Lab Sample ID: 140-15280-2
ENo Detections.
Client Sample ID: SV-10R2-042419
Lab Sample ID: 140-15280-3
ENo Detections.
Client Sample ID: SV-5R-042419
Lab Sample ID: 140-15280-4
Analyte Result Qualifier
RL MDL Unit
Dil Fac D Method Prep Type
2-METHYLNAPHTHALENE 34
25 4.2 UG/M3
1.00 T017 Total/NA
NAPHTHALENE 280
25 9.4 UG/M3
1.00 T017 Total/NA
Client Sample ID: SV-5RD-042419
Lab Sample ID: 140-15280-5
Analyte Result Qualifier
RL MDL Unit
Dil Fac D Method Prep Type
2-METHYLNAPHTHALENE 32
25 4.2 UG/M3
1.00 T017 Total/NA
NAPHTHALENE 260
25 9.4 UG/M3
1.00 T017 Total/NA
This Detection Summary does not include radiochemical test results.
Eurofins TestAmerica, Knoxville
Page 5 of 16 6/17/2019 (Rev. 2)

Client Sample Results
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Client Sample ID: SV-12R-042419
Date Collected: 04/24/19 09:48
Date Received: 04/26/19 10:30
Job ID: 140-15280-1
SDG: WO 1904598
Lab Sample ID: 140-15280-1
Matrix: Air
Method: T017 - General Subcontract Method
Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac
2-METHYLNAPHTHALENE ND U 25 4.2 UG/M3 04/30/1911:44 04/30/1911:44 1.00
NAPHTHALENE ND U 25 9.4 UG/M3 04/30/1911:44 04/30/1911:44 1.00
Surrogate %Recovery Qualifier Limits Prepared Analyzed DY Fac
NAPHTHALENE-D8 98 50 - 150 04130119 11:44 04130119 11:44 1.00
Client Sample ID: SV-14R-042419
Date Collected: 04/24/19 10:37
Date Received: 04/26/19 10:30
Lab Sample ID: 140-15280-2
Matrix: Air
Method: T017 - General Subcontract Method
Analyte
Result
Qualifier
RL
MDL Unit D Prepared
Analyzed
Dil Fac
2-METHYLNAPHTHALENE
ND
U
25
4.2 UG/M3 04/30/1912:23
04/30/1912:23
1.00
NAPHTHALENE
ND
U
25
9.4 UG/M3 04/30/1912:23
04/30/1912:23
1.00
Surrogate
%Recovery
Qualifier
Limits
Prepared
Analyzed
Dil Fac
NAPHTHALENE-D8
102
50 - 150
04130119 12:23
04130119 12:23
1.00
Client Sample ID: SV-10R2-042419
Date Collected: 04/24/19 11:26
Date Received: 04/26/19 10:30
Lab Sample ID: 140-15280-3
Matrix: Air
Method: T017 - General Subcontract Method
Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac
2-METHYLNAPHTHALENE ND U 25 4.2 UG/M3 04/30/1913:03 04/30/1913:03 1.00
NAPHTHALENE ND U 25 9.4 UG/M3 04/30/1913:03 04/30/1913:03 1.00
Surrogate %Recovery Qualifier Limits
NAPHTHALENE-D8 100 50-150
Client Sample ID: SV-5R-042419
Date Collected: 04/24/19 13:44
Date Received: 04/26/19 10:30
Method: T017 - General Subcontract Method
Analyte
Result Qualifier
2-METHYLNAPHTHALENE
34
NAPHTHALENE
280
Surrogate
%Recovery Qualifier
NAPHTHALENE-D8
127
Client Sample ID: SV-5RD-042419
Date Collected: 04/24/19 13:46
Date Received: 04/26/19 10:30
Method: T017 - General Subcontract Method
Analyte Result Qualifier
2-METHYLNAPHTHALENE 32
NAPHTHALENE 260
Surrogate %Recovery Qualifier
NAPHTHALENE-D8 118
Prepared Analyzed DY Fac
04/30/1913:03 0413011913:03 1.00
Lab Sample ID: 140-15280-4
Matrix: Air
RL MDL Unit D Prepared Analyzed Dil Fac
25 4.2 UG/M3 04/30/1913:42 04/30/1913:42 1.00
25 9.4 UG/M3 04/30/1913:42 04/30/1913:42 1.00
Limits
50-150
RL MDL Unit
25 4.2 UG/M3
25 9.4 UG/M3
Limits
50-150
Prepared Analyzed Dil Fac
0413011913:42 04/30/1913:42 1.00
Lab Sample ID: 140-15280-5
Matrix: Air
D Prepared Analyzed Dil Fac
04/30/1914:22 04/30/1914:22 1.00
04/30/1914:22 04/30/1914:22 1.00
Prepared Analyzed Dil Fac
0413011914:22 0413011914:22 1.00
Page 6 of 16
Eurofins TestAmerica, Knoxville
6/17/2019 (Rev. 2)

Surrogate Summary
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Method: T017 - General Subcontract Method
Matrix: Air
iTHALEN
Lab Sample ID Client Sample ID (50-150)
Job ID: 140-15280-1
SDG: WO 1904598
Prep Type: Total/NA
Percent Surrogate Recovery (Acceptance Limits)
140-15280-1 SV-12R-042419
98
140-15280-2 SV-14R-042419
102
140-15280-3 SV-10R2-042419
100
140-15280-4 SV-5R-042419
127
140-15280-5 SV-5RD-042419
118
Surrogate Legend
C
NAPHTHALENE-D8 = NAPHTHALENE-D8
Method: T017 - General Subcontract Method
Matrix: AIR
Prep Type: Total/NA
Percent Surrogate Recovery (Acceptance Limits)
ATHALEN
Lab Sample ID Client Sample ID
(50-150)
1904598R1-06A Method Blank
112
1904598R1-08A Lab Control Sample
110
1904598R1-08AA Lab Control Sample Dup
112
Surrogate Legend
NAPHTHALENE-D8 = NAPHTHALENE-D8
Eurofins TestAmerica, Knoxville
Page 7 of 16 6/17/2019 (Rev. 2)

QC Sample Results
Client: CH21VI Hill, Inc.
Job ID: 140-15280-1
Project/Site: Poplar Tent Road
SDG: WO 1904598
Method: T017 - General Subcontract Method
Lab Sample ID: 1904598R1-06A
Client Sample ID: Method Blank
Matrix: AIR
Prep Type: Total/NA
Analysis Batch: 11043001
Prep Batch: 11043001_P
Blank Blank
Analyte
Result Qualifier
RL
MDL Unit D Prepared Analyzed Dil Fac
2-METHYLNAPHTHALENE
ND U
25
UG/M3 04/30/19 09:56 04/30/19 09:56 1.00
NAPHTHALENE
ND U
25
UG/M3 04/30/19 09:56 04/30/19 09:56 1.00
Blank Blank
Surrogate
%Recovery Qualifier
Limits
Prepared Analyzed Dil Fac
NAPHTHALENE-D8
112
50 - 150
04130119 09:56 04130119 09:56 1.06
Lab Sample ID: 1904598R1-08A
Client Sample ID: Lab Control Sample
Matrix: AIR
Prep Type: Total/NA
Analysis Batch: 11043001
Prep Batch: 11043001_P
Spike
LCS LCS
%Rec.
Analyte
Added
Result Qualifier
Unit D %Rec Limits
2-METHYLNAPHTHALENE
100
ill
UG/M3 111 70-130
NAPHTHALENE
100
120
UG/M3 120 70-130
LCS LCS
Surrogate
%Recovery Qualifier
NAPHTHALENE-D8
110
Lab Sample ID: 19045981111-08AA
Matrix: AIR
Analysis Batch: 11043001
Analyte
2-METHYLNAPHTHALENE
NAPHTHALENE
LCS Dup LCS Dup
Surrogate
%Recovery Qualifier
NAPHTHALENE-D8
112
Limits
50-150
Client Sample ID: Lab Control Sample Dup
Prep Type: Total/NA
Prep Batch: 11043001 P
Spike
LCS Dup
LCS Dup %Rec. RPD
Added
Result
Qualifier Unit D %Rec Limits RPD Limit
100
106
UG/M3 106 70-130 4.6 25
100
116
UG/M3 116 70-130 3.4 25
Limits
50-150
Eurofins TestAmerica, Knoxville
Page 8 of 16 6/17/2019 (Rev. 2)

QC Association Summary
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Subcontract
Analysis Batch: 11043001
Lab Sample ID
Client Sample ID
140-15280-1
SV-12R-042419
140-15280-2
SV-14R-042419
140-15280-3
SV-10R2-042419
140-15280-4
SV-5R-042419
140-15280-5
SV-5RD-042419
1904598R1-06A
Method Blank
1904598R1-08A
Lab Control Sample
1904598R1-08AA
Lab Control Sample Dup
Prep Batch: 11043001_P
Lab Sample ID
Client Sample ID
140-15280-1
SV-12R-042419
140-15280-2
SV-14R-042419
140-15280-3
SV-10R2-042419
140-15280-4
SV-5R-042419
140-15280-5
SV-5RD-042419
1904598R1-06A
Method Blank
1904598R1-08A
Lab Control Sample
1904598R1-08AA
Lab Control Sample Dup
F
Job ID: 140-15280-1
SDG: WO 1904598
Prep Type
Matrix
Method
Prep Batch
Total/NA
Air
T017
11043001—P
Total/NA
Air
T017
11043001 P
Total/NA
Air
T017
11043001 P
Total/NA
Air
T017
11043001 P
Total/NA
Air
T017
11043001 P
Total/NA
AIR
T017
11043001 P
Total/NA
AIR
T017
11043001_P
Total/NA
AIR
T017
11043001_P
Prep Type
Matrix
Method
Prep Batch
Total/NA
Air
NONE
Total/NA
Air
NONE
Total/NA
Air
NONE
Total/NA
Air
NONE
Total/NA
Air
NONE
Total/NA
AIR
NONE
Total/NA
AIR
NONE
Total/NA
AIR
NONE
Eurofins TestAmerica, Knoxville
Page 9 of 16 6/17/2019 (Rev. 2)

Lab Chronicle
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
F
Job ID: 140-15280-1
SDG: WO 1904598
Client Sample ID: SV-12R-042419 Lab Sample ID: 140-15280-1
Date Collected: 04/24/19 09:48 Matrix: Air
Date Received: 04/26/19 10:30
Batch
Batch
Prep Type Type
Method Run
Total/NA Prep
NONE
Total/NA Analysis
T017
Instrument ID:
Client Sample ID: SV-14R-042419
Date Collected: 04/24/19 10:37
Date Received: 04/26/19 10:30
Batch Batch
Prep Type Type Method Run
Total/NA Prep NONE
Total/NA Analysis T017
Instrument ID:
Client Sample ID: SV-10R2-042419
Date Collected: 04/24/19 11:26
Date Received: 04/26/19 10:30
Dil Initial Final Batch Prepared
Factor Amount Amount Number or Analyzed Analyst Lab
1 11043001 04/30/1911:44 Eurofins
_P
1.00 11043001 04/30/1911:44 SU Eurofins
L-du adulple mi: I'Fu-IUcou-c
Matrix: Air
Dil Initial
Final Batch
Prepared
F
Factor Amount
Amount Number
or Analyzed Analyst
Lab M
1
11043001
04/30/1912:23
Eurofins
_P
1.00
11043001
04/30/1912:23 SU
Eurofins
Lab Sample ID: 140-15280-3
Matrix: Air C
Batch Batch
Dil
Initial
Final
Batch
Prepared
Prep Type Type Method
Run Factor
Amount
Amount
Number
or Analyzed
Analyst
Lab
Total/NA Prep NONE
1
11043001
04/30/1913:03
Eurofins
_P
Total/NA Analysis T017
1.00
11043001
04/30/1913:03
SU
Eurofins
Instrument ID:
Client Sample ID: SV-5R-042419
Lab Sample
ID: 140-15280-4
Date Collected: 04/24/19 13:44
Matrix: Air
Date Received: 04/26/19 10:30
Batch Batch
Dil
Initial
Final
Batch
Prepared
Prep Type Type Method
Run Factor
Amount
Amount
Number
or Analyzed
Analyst
Lab
Total/NA Prep NONE
1
11043001
04/30/1913:42
Eurofins
_P
Total/NA Analysis T017
1.00
11043001
04/30/1913:42
SU
Eurofins
Instrument ID:
Client Sample ID: SV-5RD-042419 Lab Sample ID: 140-15280-5
Date Collected: 04/24/19 13:46 Matrix: Air
Date Received: 04/26/19 10:30
Batch Batch Dil Initial Final Batch Prepared
Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab
Total/NA Prep NONE 1 11043001 04/30/1914:22 Eurofins
_P
Total/NA Analysis T017 1.00 11043001 04/30/1914:22 SU Eurofins
Instrument ID:
Page 10 of 16
Eurofins TestAmerica, Knoxville
6/17/2019 (Rev. 2)

Lab Chronicle
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
F
Job ID: 140-15280-1
SDG: WO 1904598
Client Sample ID: Method Blank Lab Sample ID: 1904598R1-06A
Date Collected: N/A Matrix: AIR
Date Received: N/A
Batch
Batch
Prep Type Type
Method Run
Total/NA Prep
NONE
Total/NA Analysis
T017
Instrument ID:
Dil Initial Final Batch Prepared
Factor Amount Amount Number or Analyzed Analyst Lab
1 11043001 04/30/19 09:56 Eurofins
_P
1.00 11043001 04/30/19 09:56 SU Eurofins
Client Sample ID: Lab Control Sample
Date Collected: N/A
Date Received: N/A
Batch Batch Dil Initial
Prep Type Type Method Run Factor Amount
Total/NA Prep NONE 1
Total/NA Analysis T017 1.00
Instrument ID:
Client Sample ID: Lab Control Sample Dup
Date Collected: N/A
Date Received: N/A
LdL7 JdF11PIe IU: IZIU14DZYO I-UOM
Matrix: AIR
Final Batch Prepared F
Amount Number or Analyzed Analyst Lab M
11043001 04/30/19 04:46 Eurofins
_P
11043001 04/30/19 04:46 SU Eurofins
Lab Sample ID: 1904598R1-08AA
Matrix: AIR C
Batch Batch
Dil Initial
Final Batch
Prepared
Prep Type Type Method
Run Factor Amount
Amount Number
or Analyzed Analyst Lab
Total/NA Prep NONE
1
11043001
04/30/19 06:05 Eurofins
_P
Total/NA Analysis T017
1.00
11043001
04/30/19 06:05 SU Eurofins
Instrument ID:
Laboratory References:
Eurofins = Eurofins Air Toxics, 180 Blue Ravine Road„
Suite B, Folsom, CA 95630
Page 11 of 16
Eurofins TestAmerica, Knoxville
6/17/2019 (Rev. 2)

Accreditation/Certification Summary
Client: CH2M Hill, Inc.
Project/Site: Poplar Tent Road
Laboratory: Eurofins TestAmerica, Knoxville
All accreditations/certifications held by this laboratory are listed. Not all accreditations/certifications are applicable to this report.
Job ID: 140-15280-1
SDG: WO 1904598
Authority
Program
EPA Region
Identification Number
Expiration Date
AFCEE
N/A
ANAB
DoD
L2311
02-13-22
ANAB
DoD
L2311.01
02-13-22
Arkansas DEQ
State Program
6
88-0688
06-16-20
California
State Program
9
2423
06-30-19
Colorado
State Program
8
TN00009
02-28-20
Connecticut
State Program
1
PH-0223
09-30-19
Florida
NELAP
4
E87177
06-30-19
Georgia
State Program
4
906
04-13-20
Hawaii
State Program
9
N/A
04-13-20
Kansas
NELAP
7
E-10349
10-31-19
Kentucky (DW)
State Program
4
90101
12-31-19
Louisiana
NELAP
6
83979
06-30-19
Louisiana (DW)
NELAP
6
LA160005
12-31-19
Maryland
State Program
3
277
03-31-20
Michigan
State Program
5
9933
04-13-20
Nevada
State Program
9
TN00009
07-31-19
New Hampshire
NELAP
1
2999
01-17-20
New Jersey
NELAP
2
TN001
06-30-19
New York
NELAP
2
10781
03-31-20
North Carolina (DW)
State Program
4
21705
07-31-19
North Carolina (WW/SW)
State Program
4
64
12-31-19
Ohio VAP
State Program
5
CL0059
08-28-20
Oklahoma
State Program
6
9415
08-31-19
Oregon
NELAP
10
TNIO189
06-30-19
Pennsylvania
NELAP
3
68-00576
12-31-19
Tennessee
State Program
4
2014
04-13-20
Texas
NELAP
6
T104704380-16-9
08-31-19
US Fish & Wildlife
Federal
LE-058448-0
07-31-19
USDA
Federal
P330-16-00262
08-20-19
Utah
NELAP
8
TN00009
07-31-19
Virginia
NELAP
3
460176
09-14-19
Washington
State Program
10
C593
01-19-20
West Virginia (DW)
State Program
3
9955C
12-31-19
West Virginia DEP
State Program
3
345
04-30-20
Wisconsin
State Program
5
998044300
08-31-19
Eurofins TestAmerica, Knoxville
Page 12 of 16 6/17/2019 (Rev. 2)

Method Summary
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Method Method Description Protocol
Subcontract T017 - naphthalene and 2-methylnaphthalene None
Protocol References:
None = None
Laboratory References:
Eurofins = Eurofins Air Toxics, 180 Blue Ravine Road„ Suite B, Folsom, CA 95630
F
Job ID: 140-15280-1
SDG: WO 1904598
Laboratory
Eurofins
L
Eurofins TestAmerica, Knoxville
Page 13 of 16 6/17/2019 (Rev. 2)

Sample Summary
Client: CH21VI Hill, Inc.
Project/Site: Poplar Tent Road
Job ID: 140-15280-1
SDG: WO 1904598
Lab Sample ID
Client Sample ID
Matrix
Collected
Received Asset ID
140-15280-1
SV-12R-042419
Air
04/24/19 09:48
04/26/19 10:30
140-15280-2
SV-14R-042419
Air
04/24/1910:37
04/26/1910:30
140-15280-3
SV-10R2-042419
Air
04/24/1911:26
04/26/1910:30
140-15280-4
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04/24/1913:44
04/26/1910:30
140-15280-5
SV-5RD-042419
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04/24/1913:46
04/26/1910:30
Eurofins TestAmerica, Knoxville
Page 14 of 16 6/17/2019 (Rev. 2)

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Page 15 of 16
6/17/2019 (Rev. 2)

Login Sample Receipt Checklist
Client: CH2M Hill, Inc. Job Number: 140-15280-1
SDG Number: WO 1904598
Login Number: 15280 List Source: Eurofins TestAmerica, Knoxville
List Number: 1
Creator: McKinney, Jamie A
Question Answer Comment
Radioactivity wasn't checked or is </= background as measured by a survey
meter.
The cooler's custody seal, if present, is intact.
Sample custody seals, if present, are intact. C
The cooler or samples do not appear to have been compromised or
tampered with.
Samples were received on ice.
Cooler Temperature is acceptable.
Cooler Temperature is recorded.
COC is present.
COC is filled out in ink and legible.
COC is filled out with all pertinent information.
Is the Field Sampler's name present on COC?
There are no discrepancies between the containers received and the COC.
Samples are received within Holding Time (excluding tests with immediate
HTs)
Sample containers have legible labels.
Containers are not broken or leaking.
Sample collection date/times are provided.
Appropriate sample containers are used.
Sample bottles are completely filled.
Sample Preservation Verified.
There is sufficient vol. for all requested analyses, incl. any requested
MS/MSDs
Containers requiring zero headspace have no headspace or bubble is
<6mm (1/4").
Multiphasic samples are not present.
Samples do not require splitting or compositing.
Residual Chlorine Checked.
Eurofins TestAmerica, Knoxville
Page 16 of 16 6/17/2019 (Rev. 2)