WI0400198_Monitoring (Report)_20170505

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ARCADIS Design sr Consultancy
fornaturaland
built assets
Mr. Michael Rogers
UIC Program Manager
NCDEQ — DWR
1636 Mail Service Center
Raleigh, North Carolina 27699
Subject:
1st Semi -Annual Groundwater Monitoring Report — 2017
Former BP Facility #24163
381 Knollwood Street
Winston-Salem, North Carolina 27103
Incident Number: 6400 (Closed)
Risk Classification: Low (No Further Action)
Dear Mr. Rogers:
On behalf of Atlantic Richfield Company (ARCO), a BP Products North America,
Inc. (BP) affiliated company, Arcadis G&M of North Carolina is submitting the
attached 1st Semi -Annual Groundwater Monitoring Report — 2017 dated May 3,
2017 for the above referenced site. An electronic copy of this report including the
associated laboratory analytical report is included with the attached CD.
Please contact me at [phone] with any questions or concerns related to
the Report or this incident number.
Sincerely,
Arcadis G&M of North Carolina, Inc.
r
Paul Goodell, E.I.
AFS Project Manager 5
Copies:
File — BP #24163
Arcadis U.S., Inc.
111-D Sanders Lane
Tel [phone]
Fax [phone]
www.arcadis.com
A019Ide7►1tIIA011
Date:
May 5, 2017
Contact:
Paul Goodell
Phone:
919.415.2327
Email:
[e-mail]
Our ref:
GP16BPNA.NC10
Page:
1/1

/aRCADIS design&Consultancy
fornaturaland
built assets
Atlantic Richfield Company
c/o BP Products North America, Inc.
1ST SEMI-ANNUAL MONITORING
REPORT - 2017
'A
Former BP Facility #24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
NCDEQ Incident #6400 (Closed)
Injection Permit #W10400198
May 2017

1st Semi -Annual Monitoring Report - 2017
Alexandra M. Simpson
AFS Task Manager 3
r
Paul Goodell, E.I.
AFS Project Manager 5
C. Scott Bostian, P.E.. 7
s
North Carolina P.E. No. 256B9
Senior Engineer, a ,
JST SEMI-ANNUAL
MONITORING REPORT
REPORT - 2017
Prepared for:
Atlantic Richfield Company
c/o BP Products North America, Inc.
Mr. Greg Frisch — Project Manager
4850 F. 491" Street
MBC-3 Room 155C
Cuyahoga Heights, Ohio 44125
Tel [phone]
Prepared by:
Arcadis G&M of North Carolina, Inc.
801 Corporate Center Drive
Suite 300
Raleigh, North Carolina 27607
Tel [phone]
Fax [phone]
www.arcadis-us.com
Environmental
Our Ref.:
GPI6BPNA.NC10
Date:
May 3, 2017
This document is intended only for the use of
the individual or entity for which it was
prepared and may contain information that is
privileged, confidential and exempt from
disclosure under applicable law. Any
dissemination, distribution or copying of this
document is strictly prohibited.
arcades corn

15t Semi -Annual Monitoring Report - 2017
V` Semi -Annual Monitoring Report - 2017
Former BP Facility #24163
381 Knollwood St
Winston-Salem, Forsyth County, North Carolina
Latitude 361, 5' 25.94"N Longitude 800 17' 11.79"W
(Reference Figure 1)
Groundwater Incident #: 6400 (Closed)
Risk Classification:
Reason for Risk Classification:
Land Use Category:
Source of Release:
Date of Release Discovery:
Estimated Quantity of Release:
Cause of Release:
Responsible Party:
Property Owner:
Low (No Further Action)
Dissolved -phase Sulfate
concentrations above
groundwater quality standards
(2L)
Industrial/Commercial
Former gasoline UST system(s)
1983
Unknown
Former UST System
Atlantic Richfield Company
c/o BP Products North America,
Inc.
Attn: Greg Frisch
4850 East 49«' Street
MBC-3 Room 155C
Cuyahoga Heights, Ohio 44125
[phone]
Mr. Charles Sherren
Thruway Shopping Center, LLC,
7501 Wisconsin Ave., Suite 1500
Bethesda, Maryland, 20814
[phone] ext. 215
'v
'..
a Professional Engineer for ARCAD[S G&M of North
Carolina, Inc., do certift that the information contained in this report is correct and accurate to the best of
my knowledgg: ARCAOIS G&M of North Carolina, Inc. is licensed to practice geology and engineering in
North rq#xla� TA p6i tifioation numbers of the company are C-155 (geology) and C-1869 (engineering).
a�a

1st Semi -Annual Monitoring Report - 2017
CONTENTS
1.0 Site History and Characterization ....
2.0 Groundwater Monitoring ...................
2.1 Groundwater Gauging ................
2.2 Groundwater Sampling ..............
2.3 Groundwater Analytical Results.
3.0 Site Remediation ..............................
3.1 Remediation Activities to Date...
4.0 Conclusions and Recommendations
TABLES
Table 1. Well Construction Details
Table 2. Current Groundwater Elevation Data
Table 3. Current Groundwater Analytical Data
FIGURES
Figure 1. Site Location Map
Figure 2. Site Map
Figure 3. Potentiometric Surface Map - March 3, 2017
Figure 4. Groundwater Analytical Data Map
Figure 5. Sulfate Isoconcentration Map - March 3, 2017
APPENDICES
A- Historical Groundwater Elevation Data
B- Laboratory Analytical Report and Chain -of -Custody Record — March 20, 2017
C- Historical Groundwater Analytical Data
2
4
4
4
4
5
6
7
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15t Semi -Annual Monitoring Report - 2017
EXECUTIVE SUMMARY
On behalf of Atlantic Richfield Company (ARCO), a BP Products North America, Inc. (BP)
affiliated company, Arcadis G&M of North Carolina, Inc. (Arcadis) personnel performed the semi-
annual groundwater sampling of groundwater monitoring wells associated with Former BP Facility
#24163 located at 381 Knollwood Street, in Winston-Salem, Forsyth County, North Carolina (the
Site) on March 3, 2017. All groundwater monitoring activities were conducted in response to the
final project evaluation requirement specified in Part VII, Item 5 of the Renewal Issuance of
Injection Permit W10400198 from the North Carolina Department of Environmental Quality
(NCDEQ) Division of Water Quality — Aquifer Protection Section in April 2013.
On March 3, 2017, Arcadis completed a semi-annual groundwater monitoring and sampling event
at the Site. Four (4) groundwater monitoring wells (MW-5R, MW-8R, MW-18, and MW-19) were
gauged to determine the depth to water (DTW). DTW ranged from 13.79 feet below top of casing
(btoc) in groundwater monitoring well MW-19 to 14.08 feet btoc in groundwater monitoring well
MW-18. The historical groundwater flow direction for the Site is towards the southeast.
On March 3, 2017, groundwater samples were collected from groundwater monitoring wells MW-
5R, MW-8R, MW-18, and MW-19. The maximum concentrations of selected dissolved -phase
COCs found during the March 3, 2017 sampling events are summarized in the table below:
Maximum Groundwater Concentrations (March 3, 2017)
Chemical of
Monitoring Well
Concentration
North Carolina
Concern
ID
(mg/L)
Groundwater
(COC)
Quality (2L)
Standards
Sulfate
MW-5R
3,570
250
Note: Concentration in Bold exceeds the applicable North Carolina GCL Standard
mg/L: milligrams per liter
Dissolved phase sulfate concentrations decreased compared to historical groundwater analytical
data. Dissolved phase sulfate was detected above the applicable North Carolina Groundwater
Quality (2L) Standard at groundwater monitoring wells MW-5R, MW-8R, MW-18, and MW-19.
Arcadis recommends continuing the semi-annual groundwater monitoring and sampling program
at the Site to document the natural attenuation of sulfate. The next semi-annual groundwater
monitoring and sampling event is scheduled for August 2017. Groundwater monitoring wells MW-
5R, MW-8R, MW-18, and MW-19 will be gauged to evaluate the potentiometric surface at the
Site. Groundwater samples will be collected from MW-5R, MW-8R, MW-18, and MW-19 for
analysis of sulfate by Standard Method 9056A. A Semi -Annual Groundwater Monitoring Report
documenting the proposed activities for 2017 will be submitted to the NCDEQ for review and
approval within 45-days of receipt of the laboratory analytical report.
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15t Semi -Annual Monitoring Report - 2017
1.0 SITE HISTORY AND CHARACTERIZATION
Former BP Facility #24163 is located at 381 Knollwood Street, Winston-Salem, Forsyth County, North
Carolina (the Site). The Site is currently owned by Thruway Shopping Center, LLC. and serves as a
parking lot adjacent to surrounding retail stores. The site property is approximately 0.5 acres, covered by
asphalt and concrete, and was formerly developed as a retail fueling station which housed gasoline,
diesel, waste oil, and kerosene Underground Storage Tanks (USTs). A site location map is presented as
Figure 1 and a site map is shown as Figure 2.
The North Carolina Department of Environmental Quality (NCDEQ) issued groundwater incident number
6400 due to a subsurface release of gasoline that occurred on or before September 14, 1983 from a
ruptured product line associated with the UST system. The quantity of the release remains unknown.
One (1) 10,000-gallon steel gasoline UST, three (3) 6,000-gallon steel gasoline USTs, and one (1)
10,000-gallon steel diesel UST were removed from the site in 1990. Three (3) 10,000-gallon gasoline
USTs, one (1) 10,000-gallon diesel UST, and one (1) 550-gallon waste oil UST were subsequently
installed at the site and the site was purchased by M. M. Fowler, Inc. in January 1994 and continued
operation until 2004. The remaining five USTs were removed before 2005 and the site was razed.
Site geology and hydrogeology include surficial deposits immediately underlying the site are described
generally as sandy silts that grade upward to clayey silts and silty clays. Bedrock beneath the site is
mapped as a strongly foliated biotite gneiss and schist. The maximum depth of investigation at the site
has been approximately 55 feet below ground surface (bgs); bedrock has not been encountered during
site investigation work. Historically, the range for shallow groundwater beneath the site is approximately
11 to 14 feet bgs, and groundwater flow direction is toward the southeast with an apparent horizontal
gradient of approximately 0.012 feet per foot (ft/ft). The calculated groundwater seepage velocity for
shallow groundwater beneath the site is approximately 2.8 feet per year.
Two activated sodium persulfate injections were performed at the Site on June 4 — 9, 2012 and June 3 —
6, 2013 under Underground Injection Control (UIC) Permit #W10400198 which was issued by the NCDEQ
Division of Water Quality on August 9, 2011. Approximately 11,237-gallons of sodium persulfate and
6,826-gallons of sodium persulfate were injected at the Site on June 4 — 9, 2012 and June 3 — 6, 2013,
respectively.
The NCDEQ Risk Classification for this site was reduced to "Low" on January 23, 2015 after issuing a
request for Notice of Residual Petroleum (NORP). The NORP was recorded with the Forsyth County
Register of Deeds on March 18, 2015 and imposed the following perpetual restriction on the Site
property:
• Groundwater: Groundwater from the site is prohibited from use as a water supply. Water supply
wells of any kind shall not be installed or operated on the site.
No Further Action (NFA) status was granted for the subject incident number by the NCDEQ on April 28,
2015.
In accordance with UIC Permit #W10400198, dissolved -phase concentrations of sulfate are being
monitored on a semi-annual basis at the Site. Closure of UIC Permit #W10400198 will be requested once
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15t Semi -Annual Monitoring Report - 2017
dissolved -phase sulfate concentrations are no longer detected above the North Carolina Groundwater
Quality (2L) Standards.
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15t Semi -Annual Monitoring Report - 2017
2.0 GROUNDWATER MONITORING
2.1 Groundwater Gauging
On March 3, 2017 Arcadis G&M of North Carolina, Inc. (Arcadis) personnel gauged groundwater
monitoring wells MW-5R, MW-8R, MW-18, and MW-19. Gauging was conducted with a water
interface probe (IP) prior to purging and sampling to determine DTB and DTW. The IP and
attached tape, marked in 0.01-foot increments, were properly decontaminated before each use
with Alconox soap and rinsed with distilled water. The DTW was measured from the marked
survey point on the top of well casing (TOC). All measurements were recorded to the nearest
0.01-foot increment.
The DTW ranged from 13.79 btoc in groundwater monitoring well MW-19 to 14.08 feet btoc in
groundwater monitoring well MW-18.
Groundwater monitoring well construction details are included in Table 1. Current groundwater
elevations are summarized in Table 2. Historical groundwater gauging data is provided in
Appendix A. A potentiometric surface map depicting historical groundwater flow direction is
provided as Figure 3.
2.2 Ground water Sampli ng
On March 3, 2017, groundwater monitoring wells MW-5R, MW-8R, MW-18, and MW-19 were
purged of stagnant water to prepare for groundwater sampling. Prior to purging, the amount of
water to be removed was calculated using the following formula:
3.1415 x rz x (TD-DTW) x 7.481 = gallons of water (1 well volume)
Where: r = radius of well (in feet)
TD = total depth of well (in feet)
DTW = depth to water (in feet)
In order to ensure that the water in the wells after purging is representative of the water in the
aquifer, a minimum of three well volumes were removed.
Groundwater samples obtained from the groundwater monitoring well were collected from
disposable polyethylene bailers using new nylon rope. Groundwater samples were placed in
laboratory supplied containers and shipped on wet ice to TestAmerica Inc. in Nashville,
Tennessee, for analysis of Sulfate (SO4) by Standard Method 9056A. Groundwater samples
submitted for sulfate analysis were collected in 250-milliliter plastic bottles.
The laboratory analytical report and chain -of -custody record for the March 3, 2017 groundwater
sampling event is included as Appendix B.
2.3 Groundwater Analytical Results
Groundwater analytical data from the March 3, 2017 groundwater sampling event indicated the
following:
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15t Semi -Annual Monitoring Report - 2017
• Dissolved -phase concentrations of sulfate were detected in concentrations exceeding the
applicable North Carolina 2L Standard of 250 milligrams per liter (mg/L) in groundwater
monitoring wells MW-5R (3,570 mg/L), MW-8R (1,720 mg/L), MW-18 (295 mg/L), and
MW-19 (941 mg/L).
Current groundwater analytical results are presented in Table 3. Historical analytical groundwater
data can be found in Appendix C. A dissolved phase concentration map is presented as Figure
4. A sulfate isoconcentration map depicting the dissolved -phase extent of sulfate exceeding the
applicable 2L groundwater quality standard is presented in Figure 5.
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1st Semi -Annual Monitoring Report - 2017
3.0 SITE REMEDIATION
3.1 Remediation Activities to Date
Summarized in the table below is a chronology of remediation activities performed at the site to
date:
Date
Activity
September 14, 1983
Subsurface release of gasoline from a ruptured product line
associated with the UST system
December 1990
UST systems associated with release removed; 500 tons of
contaminated soil removed during UST closure
1992
Vacuum Extraction System Installed
1992 - 1994
Vacuum Extraction System Operation
1994 - 2011
Monitoring of site
June 4 — 9, 2012
Activated Sodium Persulfate (ASP) injection event.
Approximately 11,237-gallons of sodium persulfate injected.
June 3 — 6, 2013
ASP injection event. Approximately 6,826-gallons of sodium
persulfate injected.
2013 - Present
Monitored Natural Attenuation
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15t Semi -Annual Monitoring Report - 2017
4.0 CONCLUSIONS AND RECOMMENDATIONS
Dissolved -phase sulfate was detected above the applicable 2L groundwater quality standard for
sulfate of 250 mg/L in groundwater monitoring wells MW-5R, MW-8R, MW-18, and MW-19 on
March 3, 2017.
Arcadis recommends continuing the semi-annual groundwater monitoring and sampling program
at the Site to document the natural attenuation of sulfate. The next semi-annual groundwater
monitoring and sampling event is scheduled for August 2017. Groundwater monitoring wells MW-
5R, MW-8R, MW-18, and MW-19 will be gauged to evaluate the potentiometric surface at the
Site. Groundwater samples will be collected from MW-5R, MW-8R, MW 18, and MW-19 for
analysis of sulfate by Standard Method 9056A. A Semi -Annual Groundwater Monitoring Report
documenting the proposed activities for 2017 will be submitted to the NCDEQ for review and
approval within 45-days of receipt of the laboratory analytical report.
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15t Semi -Annual Monitoring Report - 2017
TABLES
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Table 1
Monitoring Well Construction Data
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
Well
Status
Well
Type
TOC
Elevation (2)
Total
Depth ���
Well
Diameter (inches)
Screen
Interval (1)
Avg Screen
Elevation (2)
MW-3
In Use
Type II
99.03
20
2
NA - NA
NA
MW-5
Abandoned
Type II
99.39
25.5
4
10.5 - 25.5
81.4
MW-5R
In Use
Type II
NS
20
2
10 - 20
NA
MW-6
In Use
Type II
98.68
25.5
4
10.5 - 25.5
80.7
MW-6i
In Use
Type III
99.26
55
2
50 - 55
46.8
MW-8
Abandoned
Type II
97.84
24
6
NA - NA
NA
MW-8R
In Use
Type II
NS
20
2
10 - 20
NA
MW-14
In Use
Type II
100.44
22
4
7 - 22
85.9
MW-15
In Use
Type II
99.91
22
4
7 - 22
85.4
MW-16
In Use
Type II
97.42
25
2
10 - 25
79.9
MW-17
In Use
Type II
100.00
22
4
7 - 22
85.5
MW-18
In Use
Type II
NS
20
2
10 - 20
NA
MW-19
In Use
Type II
NS
20
2
10 - 20
NA
Notes:
1. Reported in feet below grade
2. Measured in feet relative to site datum
3. Conestoga Rover and Associates, a former consultant for this Site, previously reported that no reference was found to the following wells:
MW-1, MW-9, MW-10, MW-11, MW-12 or MW-13. These wells are presumed to be abandoned.
4. Monitoring wells MW-5 and MW-8 were abandoned on 5/19/2010 and replaced with monitoring wells MW-5R and MW-8R the same day.
5. Monitoring wells MW-18 and MW-19 were installated on October 25, 2011.
NA = Not Applicable / Available
NS = Not Surveyed
TOC = Top of Casing
Page 1 of 1

Table 2
Groundwater Elevation Data
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
well
Date
Measured
TOC
Elevation
Depath to
LNAPL
Depth to
Groundwater
(btoc)
LNAPL
Thickness
Corrected
Groudwater
Elevation
MW-5R
3/3/2017
NM
ND
14.01
0.00
NM
MW-8R
3/3/2017
NM
ND
13.92
0.00
NM
MW-18
3/3/2017
NM
ND
14.08
0.00
NM
MW-19
3/3/2017
NM
ND
13.79
0.00
NM
Notes:
1. Measured in feet relative to site datum
2. Corr. GW Elev. = (ref point elevation) - (depth to groundwater) + (LNAPL thickness)(LNAPL specific gravity)
3. LNAPL specific gravity assumed to be 0.73
LNAPL = Light non -aqueous phase liquid
ND = Not detected
NM = Not measured
NS = Not Surveyed
TOC = Top of casing
btoc = below top of casing
Page 1 of 1

Table 3
Summary of Groundwater Results, March 2017
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, NC
Sample ID
MW-5R
MW-8R
MW-18
MW-19
Date Sampled
3/3/2017
3/3/2017
3/3/2017
3/3/2017
Units
mg/L
mg/L
mg/L
mg/L
Sulfate
3,570
1,720
295
941
Notes•
mg/L - milligrams per liter
BOLD text indicates exceendance of NC groundwater standard 2L for sulfate (250
mg/L).
Page 1 of 1

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PARKING LOT CURBS AND ROADWAYS REPRESENT FORMER SITE
CHARACTERISTICS.
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HISTORICAL DEPICTED GROUNDWATER FLOW (FT
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FT AMSL FEET ABOVE MEAN SEA LEVEL
NOTE:
1. MONITORING WELL LOCATIONS ARE APPROXIMATE
2. THE SITE IS A VACANT PARKING LOT. ALL SITE FEATURES EXCEPT
PARKING LOT CURBS AND ROADWAYS REPRESENT FORMER SITE
CHARACTERISTICS.
0 30' 60'
GRAPHIC SCALE

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O O MW-19
Date 14/28/201619/1
MW-15 FORMER SO4 1 1730 1 1
e _ m VENT RISERS
LEGEND:
— — —
PROPERTY LINE
V
ABANDONED GROUNDWATER MONITORING WELL
N—
FORMER PRODUCT LINE
0"
CATCH BASIN
0 M.H.
MAN HOLE
IM
AREA LIGHT
• UP.
UTILITY POLE
F.H.
FIRE HYDRANT
❑ T
TELEPHONE
❑
LARGE MANHOLE COVER
GROUNDWATER MONITORING WELL
mg/L
MILLIGRAMS PER LITER
LEGEND
Abbreviation
Constituent
2 L
SO4
Sulfate
250
NOTE:
1. THE NORTH CAROLINA 2L STANDARD FOR SULFATE IS 250 mg/L
2. VALUES IN BOLD EXCEED NORTH CAROLINA 2L STANDARDS.
0 30' 60,
GRAPHIC SCALE

W
W
O
J
Z
Y
Om
11
.°- .
ass w
' M i-17 \
1
ASPHALT TRASH
PARKING ENCLOSURE
SHEDL N�
METAL SHED ZQ
I
I
FORMERUST AREAGASOLINE I FORME
SP SERVICE
STATION
*MW 16 �a CONCRETE
(295) o
\ O
MW-1MW-5R-I1L:mw:,k (3,570)_
MW-6R M
Isurvo mPl F R"IR `
MW-61 PARKING
I
MW-6 MW-1'FO
9 R DIESEL
(941) R T l^
FORMER PUMP
FO IER I corvcRETe�
TAN OoD
FORMER �
o 0 o CANOPY
I I
FORMER '
O VENT RISERS
/ \ FORMER
VENT RISERS
LEGEND:
PROPERTY LINE
Y
ABANDONED GROUNDWATER MONITORING WELL
P—
FORMER PRODUCT LINE
0C.B.
CATCH BASIN
O M.H.
MAN HOLE
M
AREA LIGHT
• D'P'
UTILITY POLE
F.H.
FIRE HYDRANT
❑ T
TELEPHONE
❑
LARGE MANHOLE COVER
GROUNDWATER MONITORING WELL
(3,570)
SULFATE CONCENTRATION (mg/L)
250
MATED Ih TE CONCENTRATION CONTOUR 2L
SEST
TANDARD (mg%L)
(mg/L)
MILLIGRAMS PER LITER
NOTE:
1. THE NORTH CAROLINA 2L STANDARD FOR SULFATE IS 250 mg/L
2. SHADED VALUES EXCEED NORTH CAROLINA 2L STANDARDS.
0 30' 60'
GRAPHIC SCALE

Historical Groundwater Elevation Data

Appendix A
Historical Groundwater Elevation Data
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
TOC
Depth to
Depth to
LNAPL
Corrected
Wen
Date
Elevation
LNAPL
Groundwater
Thickness
Groundwater
-1
(feet bloc)
(feet bloc)
(feet)
Elevation (1)(2)
*
06/24/93
ND
13.89
0.00
85.14
08/23/94
ND
14.36
0.00
84.67
03/21/95
ND
13.58
0.00
85.45
08/05/96
ND
13.54
0.00
85.49
11/17/98
ND
14.09
0.00
84.94
06/19/01
ND
14.11
0.00
84.92
09/12/01
ND
14.41
0.00
84.62
12/27/01
ND
14.51
0.00
84.52
03/05/02
ND
14.29
0.00
84.74
05/13/03
ND
14.35
0.00
84.68
12/09/03
ND
13.63
0.00
85.40
03/23/06
ND
13.64
0.00
85.39
05/08/07
ND
13.40
0.00
85.63
05/14/08
ND
13.42
0.00
85.61
05/28/09
ND
13.31
0.00
85.72
05/27/10
ND
13.07
0.00
85.96
MW-3
10/31/11
99.03
ND
13.87
0.00
85.16
05/22/12
ND
13.55
0.00
85.48
06/14/12
ND
13.53
0.00
85.50
07/09/12
ND
13.98
0.00
85.05
08/14/12
ND
14.24
0.00
84.79
09/19/12
ND
14.08
0.00
84.95
12/05/12
ND
14.42
0.00
84.61
02/26/13
ND
13.55
0.00
85.48
05/31/13
ND
13.58
0.00
85.45
08/28/13
ND
13.57
0.00
85.46
11/07/13
ND
14.30
0.00
84.73
02/27/14
ND
13.28
0.00
85.75
06/02/14
ND
13.34
0.00
85.69
10/16/14
ND
14.18
0.00
84.85
04/23/15
ND
13.54
0.00
85.49
04/28/16
ND
13.51
0.00
85.52
09/19/16
ND
13.92
0.00
85.11
03/03/17
ND
NM
0.00
NM
06/24/93
ND
13.51
0.00
85.88
08/23/94
ND
13.82
0.00
85.57
03/21/95
ND
13.71
0.00
85.68
08/05/96
ND
13.54
0.00
85.85
11/17/98
ND
14.08
0.00
85.31
06/19/01
NM
NM
NM
NM
09/12/01
ND
14.46
0.00
84.93
MW-5
12/27/01
99.39
14.51
15.07
0.56
84.73
03/05/02
14.45
14.88
0.43
84.82
05/12/03
NM
NM
NM
NM
12/09/03
13.18
13.60
0.42
86.10
03/23/06
ND
13.67
0.00
85.72
05/08/07
ND
13.45
0.00
85.94
05/14/08
ND
13.51
0.00
85.88
05/28/09
ND
13.39
0.00
86.00
05/27/10
ND
13.70
0.00
NM
10/31/11
ND
13.97
0.00
NM
05/22/12
ND
13.66
0.00
NM
06/14/12
ND
13.73
0.00
NM
07/09/12
ND
14.18
0.00
NM
08/14/12
ND
14.45
0.00
NM
09/19/12
ND
14.35
0.00
NM
12/05/12
ND
14.68
0.00
NM
02/26/13
ND
13.89
0.00
NM
NM-5R
05/31/13
NS
ND
13.77
0.00
NM
08/28/13
ND
13.83
0.00
NM
11/07/13
ND
14.53
0.00
NM
02/27/14
ND
13.39
0.00
NM
06/02/14
ND
13.47
0.00
NM
10/16/14
ND
14.32
0.00
NM
04/23/15
ND
13.69
0.00
NM
10/13/15
ND
14.19
0.00
NM
04/28/16
ND
13.61
0.00
NM
09/19/16
ND
13.99
0.00
NM
03/03/17
ND
14.01
0.00
NM
Page 1 of 5

Appendix A
Historical Groundwater Elevation Data
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
TOC
Depth to
Depth to
LNAPL
Corrected
Well
Date
Elevation
LNAPL
Groundwater
Thickness
Groundwater
-1
(feet btoc)
(feet bloc)
(feet)
Elevation (1)(2)
*
06/24/93
ND
12.31
0.00
86.37
08/23/94
ND
12.61
0.00
86.07
03/21/95
ND
13.15
0.00
85.53
08/05/96
ND
12.39
0.00
86.29
11/17/98
ND
13.16
0.00
85.52
06/19/01
NM
NM
NM
NM
09/12/01
ND
13.51
0.00
85.17
12/27/01
ND
13.61
0.00
85.07
MW 6
03/05/02
98.68
ND
11.02
0.00
87.66
05/12/03
ND
11.10
0.00
87.58
12/09/03
ND
13.49
0.00
85.19
03/23/06
ND
11.79
0.00
86.89
05/08/07
ND
12.50
0.00
86.18
05/14/08
ND
12.16
0.00
86.52
05/28/09
ND
10.64
0.00
88.04
05/27/10
ND
11.84
0.00
86.84
10/31/11
ND
12.95
0.00
85.73
06/02/14
ND
12.38
0.00
86.30
06/24/93
ND
NM
0.00
NM
08/23/94
ND
NM
0.00
NM
03/21/95
ND
14.75
0.00
84.51
08/05/96
ND
14.13
0.00
85.13
11/17/98
ND
14.09
0.00
85.17
06/19/O1
ND
18.07
0.00
81.19
09/12/O1
ND
16.60
0.00
82.66
12/27/01
ND
14.61
0.00
84.65
03/05/02
ND
14.96
0.00
84.30
MW-6i
05/12/03
99.26
ND
15.17
0.00
84.09
12/09/03
ND
13.55
0.00
85.71
03/23/06
ND
13.55
0.00
85.71
05/08/07
ND
12.93
0.00
86.33
05/14/08
ND
13.22
0.00
86.04
05/28/09
ND
13.39
0.00
85.87
05/27/10
ND
13.23
0.00
86.03
10/31/11
ND
13.90
0.00
85.36
06/02/14
ND
13.35
0.00
85.91
04/28/16
ND
13.55
0.00
85.71
*
08/23/94
ND
12.14
0.00
85.70
*
03/21/95
ND
12.02
0.00
85.82
*
08/05/96
ND
11.99
0.00
85.85
*
11/17/98
ND
12.53
0.00
85.31
*
06/19/01
NM
NM
NM
NM
*
09/12/01
ND
12.67
0.00
85.17
MW 8
*
12/27/O1
97.84
14.47
15.03
0.56
83.26
*
03/05/02
12.42
12.60
0.18
85.38
05/12/03
NM
NM
NM
NM
12/09/03
13.32
13.56
0.24
84.47
03/23/06
ND
12.15
0.00
85.69
05/08/07
ND
11.90
0.00
85.94
05/14/08
ND
11.95
0.00
85.89
05/28/09
ND
11.70
0.00
86.14
Page 2 of 5

Appendix A
Historical Groundwater Elevation Data
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
TOC
Depth to
Depth to
LNAPL
Corrected
Wen
Date
Elevation
LNAPL
Groundwater
Thickness
Groundwater
-1
(feet btoc)
(feet bloc)
(feet)
Elevation (1)(2)
05/27/10
ND
12.97
0.00
NM
10/31/11
ND
13.34
0.00
NM
05/22/12
ND
13.69
0.00
NM
06/14/12
ND
14.94
0.00
NM
07/09/12
ND
14.08
0.00
NM
08/14/12
ND
14.29
0.00
NM
09/19/12
ND
14.08
0.00
NM
12/05/12
ND
14.53
0.00
NM
02/26/13
ND
13.80
0.00
NM
MW-8R
05/31/13
NS
ND
13.61
0.00
NM
08/28/13
ND
13.74
0.00
NM
11/07/13
ND
14.42
0.00
NM
02/27/14
ND
13.33
0.00
NM
06/02/14
ND
13.34
0.00
NM
10/16/14
ND
14.18
0.00
NM
04/23/15
ND
13.57
0.00
NM
10/13/15
ND
14.08
0.00
NM
04/28/16
ND
13.53
0.00
NM
09/19/16
ND
13.91
0.00
NM
03/03/17
ND
13.92
0.00
NM
06/24/93
NM
NM
NM
NM
08/23/94
NM
NM
NM
NM
03/21/95
ND
13.55
0.00
86.89
08/05/96
ND
13.64
0.00
86.80
11/17/98
ND
14.26
0.00
86.18
06/19/O1
ND
14.55
0.00
85.89
09/12/01
ND
14.81
0.00
85.63
12/27/01
ND
14.85
0.00
85.59
03/05/02
ND
14.64
0.00
85.80
MW-14
05/12/03
100.44
ND
13.41
0.00
87.03
12/09/03
ND
13.51
0.00
86.93
03/23/06
ND
13.82
0.00
86.62
05/08/07
ND
13.54
0.00
86.90
05/14/08
ND
13.64
0.00
86.80
05/28/09
ND
13.47
0.00
86.97
05/27/10
ND
13.00
0.00
87.44
10/13/11
ND
14.14
0.00
86.30
06/02/14
ND
13.42
0.00
87.02
04/28/16
ND
13.65
0.00
86.79
06/24/93
NM
NM
NM
NM
08/23/94
NM
NM
NM
NM
03/21/95
ND
12.83
0.00
87.08
08/05/96
ND
12.77
0.00
87.14
11/17/98
ND
13.58
0.00
86.33
06/19/01
ND
13.80
0.00
86.11
09/12/01
ND
14.18
0.00
85.73
12/27/01
ND
14.29
0.00
85.62
03/05/02
ND
13.98
0.00
85.93
MW-15
05/12/03
99.91
NM
12.75
NM
87.16
12/09/03
ND
12.89
0.00
87.02
03/23/06
ND
13.14
0.00
86.77
05/08/07
ND
12.90
0.00
87.01
05/14/08
ND
13.12
0.00
86.79
05/28/09
ND
12.90
0.00
87.01
05/27/10
ND
12.25
0.00
87.66
10/31/11
ND
13.61
0.00
86.30
06/02/14
ND
12.82
0.00
87.09
10/16/14
ND
13.91
0.00
86.00
04/28/16
ND
13.15
0.00
86.76
Page 3 of 5

Appendix A
Historical Groundwater Elevation Data
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
TOC
Depth to
Depth to
LNAPL
Corrected
Well
Date
Elevation
LNAPL
Groundwater
Thickness
Groundwater
-1
(feet btoc)
(feet bloc)
(feet)
Elevation (1)(2)
06/24/93
NM
NM
NM
NM
08/23/94
NM
NM
NM
NM
03/21/95
ND
12.06
0.00
85.36
08/05/96
ND
12.09
0.00
85.33
11/17/98
ND
12.60
0.00
84.82
06/19/01
ND
12.74
0.00
84.68
09/12/01
ND
12.98
0.00
84.44
12/27/01
NM
NM
NM
NM
03/05/02
ND
12.83
0.00
84.59
MW-16
05/12/03
97.42
NM
NM
NM
NM
12/09/03
ND
12.13
0.00
85.29
03/23/06
ND
12.18
0.00
85.24
05/08/07
NM
NM
NM
NM
05/14/08
ND
12.03
0.00
85.39
05/28/09
ND
11.96
0.00
85.46
05/27/10
ND
11.69
0.00
85.73
10/31/11
ND
12.45
0.00
84.97
11/07/13
ND
12.88
0.00
84.54
06/02/14
ND
11.97
0.00
85.45
06/24/93
NM
NM
NM
NM
08/23/94
NM
NM
NM
NM
03/21/95
ND
14.42
0.00
85.58
08/05/96
ND
14.46
0.00
85.54
11/17/98
ND
14.91
0.00
85.09
06/19/01
ND
15.03
0.00
84.97
09/12/01
ND
15.28
0.00
84.72
12/27/O1
ND
15.37
0.00
84.63
03/05/02
ND
15.15
0.00
84.85
MW-17
05/12/03
100.00
NM
14.15
NM
85.85
12/09/03
ND
14.50
0.00
85.50
03/23/06
ND
14.45
0.00
85.55
05/08/07
ND
14.22
0.00
85.78
05/14/08
ND
14.22
0.00
85.78
05/28/09
ND
14.12
0.00
85.88
05/27/10
ND
13.90
0.00
86.10
10/31/11
ND
14.72
0.00
85.28
06/02/14
ND
14.14
0.00
85.86
04/28/16
ND
14.36
0.00
85.64
10/31/11
ND
13.95
0.00
NM
05/22/12
ND
14.10
0.00
NM
06/14/12
ND
13.61
0.00
NM
07/09/12
ND
14.05
0.00
NM
08/14/12
ND
14.43
0.00
NM
09/19/12
ND
14.34
0.00
NM
12/05/12
ND
14.62
0.00
NM
02/26/13
ND
14.67
0.00
NM
05/31/13
ND
14.57
0.00
NM
MW-18
08/28/13
NS
ND
14.33
0.00
NM
11/07/13
ND
14.51
0.00
NM
02/27/14
ND
13.76
0.00
NM
06/02/14
ND
13.55
0.00
NM
10/16/14
ND
14.37
0.00
NM
04/23/15
ND
13.84
0.00
NM
10/13/15
ND
14.81
0.00
NM
04/28/16
ND
13.62
0.00
NM
09/19/16
ND
14.04
0.00
NM
03/03/17
ND
14.08
0.00
NM
Page 4 of 5

Appendix A
Historical Groundwater Elevation Data
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
Well
Date
TOC
Elevation
-1
Depth to
LNAPL
(feet btoc)
Depth to
Groundwater
(
LNAPL
Thickness
(feet)
Corrected
Groundwater
Elevation (1)(2)
10/31/11
ND
13.75
0.00
NM
05/22/12
ND
13.37
0.00
NM
06/14/12
ND
13.39
0.00
NM
07/09/12
ND
13.89
0.00
NM
08/14/12
ND
14.13
0.00
NM
09/19/12
ND
14.02
0.00
NM
12/05/12
ND
14.39
0.00
NM
02/26/13
ND
13.62
0.00
NM
05/31/13
ND
13.47
0.00
NM
MW-19
08/28/13
NS
ND
13.56
0.00
NM
11/07/13
ND
14.25
0.00
NM
02/27/14
ND
13.17
0.00
NM
06/02/14
ND
13.14
0.00
NM
10/16/14
ND
14.03
0.00
NM
04/23/15
ND
13.46
0.00
NM
10/13/15
ND
14.01
0.00
NM
04/28/16
ND
13.38
0.00
NM
09/19/16
ND
13.75
0.00
NM
03/03/17
ND
13.79
0.00
NM
Notes:
L Measured in feet relative to site datum
2. Corr. GW Elev. _ (ref. point elevation) - (depth to groundwater) + (LNAPL thiclmess)(LNAPL specific gravity)
3. LNAPL specific gravity assumed to be 0.73
• Monitoring well MW-3 was previously reported as MW-2, monitoring well MW-6 was previously reported m MW-8, and monitoring well MW-8 was
previously been reported as MW-6.
LNAPL = Light non -aqueous phase liquid
ND = Not detected
NM = Not measured
NS = Not Surveyed
TOC = Top of casing
bloc = below top of casing
- During the May 2003 sampling event LNAPL was observed in MW-5. Depth to groundwater and thickness of LNAPL were not measured.
Page 5 of 5

FAIMIlk W w A ,
Laboratory Analytical Report and Chain -of -Custody Record — March 3,
2017

TestAmerica °
THE LEADER IN ENVIRONMENTAL TESTING
ANALYTICAL REPORT
TestAmerica Laboratories, Inc.
TestAmerica Nashville
2960 Foster Creighton Drive
Nashville, TN 37204
Tel: [phone]
TestAmerica Job ID: 490-123161-1
TestAmerica SDG: 381 Knollwood St, Winston-Salem, NC
Client Project/Site: Former BP Facility #24163
For:
ARCADIS U.S., Inc.
801 Corporate Center Drive
Suite 300
Raleigh, North Carolina 27607-5073
Attn: Paul Goodell
q44J.- W
Authorized for release by.
312012017 11:23:22 AM
Heather Wagner, Project Manager 1
[phone]
[e-mail]
Designee for
Jennifer Huckaba, Project Manager 11
[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: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Table of Contents
CoverPage ..............................................
1
Table of Contents .........................................
2
Sample Summary .........................................
3
Case Narrative ...........................................
4
Definitions...............................................
5
Client Sample Results ......................................
6
QC Sample Results ........................................
10
QC Association ...........................................
11
Chronicle................................................
12
Method Summary .........................................
13
Certification Summary ......................................
14
Chain of Custody ..........................................
15
Receipt Checklists .........................................
17
TestAmerica Nashville
Page 2 of 17 3/20/2017

Sample Summary
Client: ARCADIS U.S., Inc.
TestAmerica Job ID: 490-123161-1
Project/Site: Former BP Facility #24163
SDG: 381 Knollwood St, Winston-Salem, NC
Lab Sample ID Client Sample ID
Matrix
Collected Received
490-123161-1 MW-5R
Ground Water
03/03/17 11:35 03/04/17 09:30
490-123161-2 MW-8R
Ground Water
03/03/17 11:45 03/04/17 09:30
490-123161-3 MW-18
Ground Water
03/03/17 11:55 03/04/17 09:30
490-123161-4 MW-19
Ground Water
03/03/17 12:05 03/04/17 09:30
TestAmerica Nashville
Page 3 of 17 3/20/2017

Case Narrative
Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
Job ID: 490-123161-1
Laboratory: TestAmerica Nashville
Narrative
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
0
Job Narrative
490-123161-1
Comments
No additional comments.
Receipt
The samples were received on 3/4/2017 9:30 AM; the samples arrived in good condition, properly preserved and, where required, on ice.
The temperature of the cooler at receipt was 0.41 C.
HPLC/IC
Method(s) 9056A: The matrix spike / matrix spike duplicate (MS/MSD) recoveries for analytical batch 490-415484 were outside control
limits. Sample matrix interference and/or non -homogeneity are suspected because the associated laboratory control sample (LCS)
recovery was within acceptance limits.
No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.
TestAmerica Nashville
Page 4 of 17 3/20/2017

Definitions/Glossary
Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
Qualifiers
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
HPLCAC
Qualifier Qualifier Description
4 MS, MSD: The analyte present in the original sample is greater than 4 times the matrix spike concentration; therefore, control limits are not
applicable.
G
Abbreviation
a
%R
CFL
CNF
DER
Dil Fac
DL, RA, RE, IN
DLC
M DA
EDL
MDC
MDL
ML
NC
ND
PQL
QC
RER
RL
RPD
TEF
TEQ
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
Percent Recovery
Contains Free Liquid
Contains no Free Liquid
Duplicate error ratio (normalized absolute difference)
Dilution Factor
Indicates a Dilution, Re -analysis, Re -extraction, or additional Initial metals/anion analysis of the sample
Decision level concentration
Minimum detectable activity
Estimated Detection Limit
Minimum detectable concentration
Method Detection Limit
Minimum Level (Dioxin)
Not Calculated
Not detected at the reporting limit (or MDL or EDL if shown)
Practical Quantitation Limit
Quality Control
Relative error ratio
Reporting Limit or Requested Limit (Radiochemistry)
Relative Percent Difference, a measure of the relative difference between two points
Toxicity Equivalent Factor (Dioxin)
Toxicity Equivalent Quotient (Dioxin)
TestAmerica Nashville
Page 5 of 17 3/20/2017

Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
Client Sample ID: MW-5R
Date Collected: 03/03/17 11:35
Date Received: 03/04/17 09:30
Client Sample Results C
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Method: 9056A - Anions, Ion Chromatography
Analyte Result Qualifier RL
Sulfate 3570 100
Lab Sample ID: 490-123161-1
Matrix: Ground Water
MDL Unit D Prepared
mg/L
Analyzed Dil Fac
03/17/1719:27 100
TestAmerica Nashville
Page 6 of 17 3/20/2017

Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
Client Sample Results C
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Client Sample ID: MW-8R Lab Sample ID: 490-123161-2
Date Collected: 03/03/17 11:45 Matrix: Ground Water
Date Received: 03/04/17 09:30
Method: 9056A - Anions, Ion Chromatography
Analyte Result Qualifier
Sulfate 1720
RL MDL Unit D Prepared Analyzed Dil Fac
100 mg/L 03/17/1719:38 100
TestAmerica Nashville
Page 7 of 17 3/20/2017

Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
Client Sample Results C
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Client Sample ID: MW-18 Lab Sample ID: 490-123161-3
Date Collected: 03/03/17 11:55 Matrix: Ground Water
Date Received: 03/04/17 09:30
Method: 9056A - Anions, Ion Chromatography
Analyte Result Qualifier
Sulfate 295
RL MDL Unit D Prepared Analyzed Dil Fac
10.0 mg/L 03/17/1719:49 10
TestAmerica Nashville
Page 8 of 17 3/20/2017

Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
Client Sample ID: MW-19
Date Collected: 03/03/17 12:05
Date Received: 03/04/17 09:30
Client Sample Results C
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Method: 9056A - Anions, Ion Chromatography
Analyte Result Qualifier RL
Sulfate 941 100
Lab Sample ID: 490-123161-4
Matrix: Ground Water
MDL Unit D Prepared
mg/L
Analyzed Dil Fac
03/17/17 20:45 100
TestAmerica Nashville
Page 9 of 17 3/20/2017

QC Sample Results C
Client: ARCADIS U.S., Inc. TestAmerica Job ID: 490-123161-1
Project/Site: Former BP Facility #24163 SDG: 381 Knollwood St, Winston-Salem, NC
Method: 9056A - Anions, Ion Chromatography
Lab Sample ID: MB 490-415484/3
Matrix: Water
Analysis Batch: 415484
MB MB
Analyte Result Qualifier RL
Sulfate ND 1.00
Lab Sample ID: LCS 490-415484/4
Matrix: Water
Analysis Batch: 415484
Client Sample ID: Method Blank
Prep Type: Total/NA
MDL Unit D Prepared Analyzed Dil Fac
mg/L 03/17/17 18:54 1
Client Sample ID: Lab Control Sample
Prep Type: Total/NA
Spike
LCS
LCS
%Rec.
Analyte
Added
Result
Qualifier
Unit
D %Rec Limits
Sulfate
10.0
9.811
mg/L
98 80 -120
Lab Sample ID: LCSD 490-415484/5
Client Sample
ID: Lab Control Sample Dup
Matrix: Water
Prep Type: Total/NA
Analysis Batch: 415484
Spike
LCSD
LCSD
%Rec. RPD
Analyte
Added
Result
Qualifier
Unit
D %Rec Limits RPD Limit
Sulfate
10.0
9.804
mg/L
98 80 -120 0 20
Lab Sample ID: 490-123161-3 MS
Client Sample ID: MW-18
Matrix: Ground Water
Prep Type: Total/NA
Analysis Batch: 415484
Sample Sample
Spike
MS
MS
%Rec.
Analyte Result Qualifier
Added
Result
Qualifier
Unit
D %Rec Limits
Sulfate 295
20.0
256.1
4
mg/L
-197 80 - 120
Lab Sample ID: 490-123161-3 MSD Client Sample ID: MW-18
Matrix: Ground Water Prep Type: Total/NA
Analysis Batch: 415484
Sample Sample Spike MSD MSD %Rec. RPD
Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit
Sulfate 295 20.0 257.1 4 mg/L -192 80-120 0 20
TestAmerica Nashville
Page 10 of 17 3/20/2017

QC Association Summary
Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
HPLC/IC
Analysis Batch: 415484
Lab Sample ID
490-123161-1
490-123161-2
490-123161-3
490-123161-4
MB 490-415484/3
LCS 490-415484/4
LCSD 490-415484/5
490-123161-3 MS
490-123161-3 MSD
Client Sample ID
MW-8R
MW-18
MW-19
Method Blank
Lab Control Sample
Lab Control Sample Dup
MW-18
MW-18
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Prep Type
Matrix
Method
Total/NA
Ground Water
9056A
Total/NA
Ground Water
9056A
Total/NA
Ground Water
9056A
Total/NA
Ground Water
9056A
Total/NA
Water
9056A
Total/NA
Water
9056A
Total/NA
Water
9056A
Total/NA
Ground Water
9056A
Total/NA
Ground Water
9056A
Prep Batch
0
Page 11 of 17
TestAmerica Nashville
3/20/2017

Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
Client Sample ID: MW-5R
Date Collected: 03/03/17 11:35
Date Received: 03/04/17 09:30
Batch Batch
Prep Type Type Method Run
Total/NA Analysis 9056A
Client Sample ID: MW-8R
Date Collected: 03/03/17 11:45
Date Received: 03/04/17 09:30
Batch Batch
Prep Type Type Method Run
Total/NA Analysis 9056A
Client Sample ID: MW-18
Date Collected: 03/03/17 11:55
Date Received: 03/04/17 09:30
Lab Chronicle C
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Lab Sample ID: 490-123161-1
Matrix: Ground Water
Dil Initial Final Batch Prepared
Factor Amount Amount Number or Analyzed Analyst Lab
100 415484 03/17/17 19:27 T1C TAL NSH
Dil Initial Final
Factor Amount Amount
100
Lab Sample ID: 490-123161-2
Matrix: Ground Water
Batch Prepared
Number or Analyzed Analyst Lab
415484 03/17/17 19:38 T1C TAL NSH
Lab Sample ID: 490-123161-3
Matrix: Ground Water
Batch
Batch
Dil Initial
Final Batch
Prepared
Prep Type Type
Method
Run Factor Amount
Amount Number
or Analyzed Analyst Lab
Total/NA Analysis
9056A
10
415484
03/17/17 19:49 T1C TAL NSH
Client Sample ID: MW-19
Date Collected: 03/03/17 12:05
Date Received: 03/04/17 09:30
Lab Sample ID: 490-123161-4
Matrix: Ground Water
Batch Batch Dil Initial Final Batch Prepared
Prep Type Type Method Run Factor Amount Amount Number or Analyzed Analyst Lab
Total/NA Analysis 9056A 100 415484 03/17/17 20:45 T1 C TAL NSH
Laboratory References:
TAL NSH = TestAmerica Nashville, 2960 Foster Creighton Drive, Nashville, TN 37204, TEL [phone]
Page 12 of 17
TestAmerica Nashville
3/20/2017

Method Summary
Client: ARCADIS U.S., Inc.
Project/Site: Former BP Facility #24163
TestAmerica Job ID: 490-123161-1
SDG: 381 Knollwood St, Winston-Salem, NC
Method Method Description Protocol Laboratory
9056A Anions, Ion Chromatography SW846 TAL NSH
Protocol References:
SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates.
Laboratory References:
TAL NSH = TestAmerica Nashville, 2960 Foster Creighton Drive, Nashville, TN 37204, TEL [phone]
TestAmerica Nashville
Page 13 of 17 3/20/2017

Certification Summary
Client: ARCADIS U.S., Inc. TestAmerica Job ID: 490-123161-1
Project/Site: Former BP Facility #24163 SDG: 381 Knollwood St, Winston-Salem, NC
Laboratory: TestAmerica Nashville
Unless otherwise noted, all analytes for this laboratory were covered under each certification below.
Authority Program EPA Region Certification ID Expiration Date
North Carolina (WW/SW) State Program 4 387 12-31-17
The following analytes are included in this report, but are not certified under this certification:
Analysis Method Prep Method Matrix Analyte
9056A Ground Water Sulfate
TestAmerica Nashville
Page 14 of 17 3/20/2017

TestAmedca
THE LEADER IN ENVIRONMENTAL TESTING
Nashville, TN COOLER RECEIPT FORA?
dgD-123181 Chain of Custor;
Cooler Received/Opened On 3l412017 093i1 --
Time Samples Removed From Cooler Time Samples Placed In Storage 12 Hour Window)
1. Tracking # I (last 4 digits, FedEx) Courier: _FedEx_
IR Gun Wi7960353_ pH Strip Lot Chlorine Strip Lot
2. Temperature of rep. sample or temp blank when opened: a ► begrees Celsius
3. If Item 92 temperatures Is QCC or less, was the representative sample or temp blank frozen? YES N0... IA
4. Were custody seals on outside of cooler? &4/VTAM>Lp YE ..NO.,6
If yes, how many and where: +� r /
5. Were the seals intact, signed, and dated correctly? 3YE
NO...NA
6. Were custody papers inside cooler? .NO...NA
certify that I opened the copier and answered questions 1.6 (initial! rJ
7. Were custody seals on containers: YES I and Intact
YES...NO..�
Were these signed and dated correctly?
YES...NO.14
6. Packing mat'I used? Bubbiewrap Plastic bag Peanuts Vermiculite Foam Insert Paper OtheAZnb
9. Cooling process: Ice Ice -pack .. a rect contact Dry Ice
Other None
10. Did all containers arrive in good condition (unbroken)?
€ ...NO...NA
11. Were ail contalner labels complete (0, data, signed, pres., etc)?
NO...NA
12. Did all container labels and tags agree with custody papers?
E ...NO...NA
13a. Were VOA vials received?
YES...,NA
b. Was there any observable headspace present in any VOA vial?
YES...NO.C�1.
14. Was there a Trip Blank in this cooler? YES..0P..NA if multiple Gaolers, sequence # ✓A
I certify that I unloaded the coofer and answered questions 7-14 initial ��
15a. On pres'd battles, d I d pH test strips suggest preservation reached the correct pH level?
YES..N0
3
b. Did the bottle labels indicate that the correct preservatives were used
YF ..NO...NA
16. was residual chlorine present?
YES...NO. No
certify that I checked for chlorine and pH as per SOP and answered questions 15-16 (initial
17. Were custody papers properly filled out (ink, signed, etc)?
No ... NA
18, Did you sign the custody papers in the appropriate place?
E ...NO...NA
19. Were correct containers used for the analysis requested?
14�...NO... NA
20. Was sufficient amount of sample sent in each container?
&E ...NO...NA
I certify that I entered this droIact into LIMS and answered questions 17-20 [Initial]
21. Were there Non -Conformance issues at login? YES..
a NCM generated? YES. .,lN01..#
i115 = Bioken in Et1Tipmenl
CoolerRLanpt I-enn.duc U-I Revised I21MI5
End of roan
Page 15 of 17
3/20/2017

CD
N
CD
N
(h
T� ` _ — �� H tshuillvfliv]Elon
g�1"i!� ,Y'7, 29B0 Faster Creiflhoof.
phase: 726-OS77
TOFn�: $00- 800.756.0980
THE LEADEA In4 ENVIRONMENTAL TI:BT INC Ngsjtyille, TN 37204
Fix: SIS-72e34lt,1
Consukant Name: ARG40IS
Addre Ill -0 Sanders Lane
GdylStetvl4FP: BLUE FIELD, VA 2480.9
C on!+Atvnt Project Mgr. PaW 43ppdad
Consultant To rephpne Number: 9194 1&2327
F!" Na.: 278-322-" 9w
Sampl.r Hemp; trd.tS CL e'
1
samp4er Signature_ _ Y ;`.
P�!aff
TA Account p; Pot,
Invoice To: N75PAYA8LE.AflFAINI T t1aN ARCADIS )S.COM
Report To; P;.O GvDdefl -
Project flame: Fommer pP fadIIH
R.taa R (MRN 4); 241IZ —
Major Project(Al2M.
Site Address 381 ttnmlhypad 8t
City. Slam, Zip WiRatorr.Salmn, Nam Carolina
Regulatory diwtct iC-A)
Pra4wl &,e I Mamm I Anr" Far,
c
n
c
6
4
33i
0
=
m
s
w
Loa: 490
p
123161
g
yy
ag
E
n
R
191
~
n
Sa to ID or Fkd ID
O
Z
li
cc
Cr
fi
i
rJ
4
�S
S
¢
Q
MW-8R
�i4j
i
z
/
i
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mw-TS
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MW-79
i b�
1
x
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x
CamrnonwsPecial lnsuuctlons
L�tiorelpry Gontsrants: ��7
Temparma]m Upor. Rexlp: V'
Sampe Conumonis Irasci7 Y N
VOCS F[ec of Yl�dspaca� Y H
�¢LVr�dyles {ylesee�Srele m�e7
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Re:eiysd 4y'
Deis
71mo
- rt >,dh he the rarpomlhehy yr 8p or �
con dt m Wq a,e TesrAmetln Fr jen Manager
Repnqulshed e'!•
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by pC or I- tirat a nqh -.pm va"sutmide6.
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7A psi ect Wwr-ON'. Da1rc

Login Sample Receipt Checklist
Client: ARCADIS U.S., Inc.
Login Number: 123161
List Number: 1
Creator: Abernathy, Eric
Question
Job Number: 490-123161-1
SDG Number: 381 Knollwood St, Winston-Salem, NC
List Source: TestAmerica Nashville
Answer Comment
Radioactivity wasn't checked or is </= background as measured by a survey
N/A
meter.
The cooler's custody seal, if present, is intact.
True
Sample custody seals, if present, are intact.
True
The cooler or samples do not appear to have been compromised or
True
tampered with.
Samples were received on ice.
True
Cooler Temperature is acceptable.
True
Cooler Temperature is recorded.
True
COC is present.
True
COC is filled out in ink and legible.
True
COC is filled out with all pertinent information.
True
Is the Field Sampler's name present on COC?
True
There are no discrepancies between the containers received and the COC.
True
Samples are received within Holding Time (excluding tests with immediate
True
HTs)
Sample containers have legible labels.
True
Containers are not broken or leaking.
True
Sample collection date/times are provided.
True
Appropriate sample containers are used.
True
Sample bottles are completely filled.
True
Sample Preservation Verified.
N/A
There is sufficient vol. for all requested analyses, incl. any requested
True
MS/MSDs
Containers requiring zero headspace have no headspace or bubble is
True
<6mm (1/4").
Multiphasic samples are not present.
True
Samples do not require splitting or compositing.
True
Residual Chlorine Checked.
N/A
TestAmerica Nashville
Page 17 of 17 3/20/2017

APPENDIX C
Historical Groundwater Analytical Data

Appendix C
Historical Groundwater Analytical Summary
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
Well
Sample Date
Benzene
Ethyl
benzene
Toluene
y enes
(Total)
MTBE
Sulfate
Carbon
dioxide
NC GCL:
5,000
84,500
260,000
85,500
20,000
NE
NE
INC 2L
1
600
600
500
20
250
NE
Units:
1
1
m l
Mg/1
MW-3
5/13/2003
8.5
0.98 J
0.61 J
1.7 J
8
12/9/2003
47.4
1 14.3
1.9
1 8.1
1 37.3
3/23/2006
4.5 J
< 0.5
< 0.5 UJ
< 1 UJ
5.5
5/8/2007
40.4
3.7
1.4
2 J
13.1
5/14/2008
4.3J
<0.8
<0.7
<0.8
14
5/28/2009
5.4
0.44 J
0.14 J
0.49 J
5.6
5/27/2010
0.44 J
< 0.11
0.3 J
< 0.32
4.8
10/31/2011
5.5
0.76
< 0.17 U
0.38 J
19.1
8.4
405
5/22/2012
< 0.43 U
< 0.2
< 0.2
< 0.52
4.6
15.3
378
6/14/2012
12.1
6.7
0.72
4.7
15.4
6.6 J
344
7/9/2012
2.2
1.6
2.6
3
14.7
9.9
393
8/14/2012
2
2.1
< 0.13
0.4 J
17.9
3.6
303
9/19/2012
2.7
0.66
<0.13
0.33J
19.8
2.8
459
12/5/2012
11.3
1.2
0.43 J
1.1 J
19.3
0.78 J
377
2/26/2013
0.23 J
< 0.1
< 0.1
< 0.22
5.4
32.6
338
5/31/2013
0.32J
<0.1
<0.1
<0.22
10.5
17.9
334
8/28/2013
3.6
0.53
0.12 J
0.31 J
10.3
21.9
457
11/7/2013
4.3
0.27 J
0.13 J
<0.22
10
21.7
536
2/27/2014
< 0.1
< 0.1
< 0.1
< 0.2
1.3
42.2
198
6/3/2014
0.48 J
0.15 J
< 0.1
< 0.2
3.1
10/16/2014
18.0
372
4/23/2015
22.8
296
9/19/2016
21.3
MW-5
3/23/2006
11,700
2,440
32,000
13,500
16,100
3/23/2006
11,000
2,370
30,700
13,200
15,400
5/8/2007
7,410
1,590
21,100
8,920
8,830
5/8/2007 0)
7,400
1,680
20,100
9,290
9,360
5/14/2008
10,000
2,100
29,000
12,000
18,000
5/14/2008 01
10,000
2,100
30,000
12,000
18,000
5/28/2009
7,390
2,330
25,700
13,400
6,920
5/28/2009 (1)
6,510
2,240
22,100
12,900
6,510
MW-5R
5/27/2010
6,610
2,810
24,300 J
15,700
4,330
5/27/2010 00
6,090
2,380
30,100 J
13,300
4,250
10/31/2011
7,960
2,660
28,000
13,800
3,830
< 1
< 5
10/31/2011 (i>
8,360
2,870
24,600
14,800
4,070
5/22/2012
7,980
3,470
32,200
19,200
3,820
< 5
179
6/15/2012 «>
244
227
1,190
1,120
36.9
6,070
1,820
7/9/2012
336 J
481 J
2,010 J
2,400 J
48.4 J
6,470
2,620
8/14/2012
201
283
1,050
1,300
48.5
14,700.
4,190
9/19/2012
158
181
650
883
114
19,000
3,280
12/5/2012
754
505
2,220
2,380
1,160
13,600
1,840
2/26/2013
1,360
878
3,520
3,940
1,660
8,520
1,530
5/31/2013
1,410
1,380
5,930
6,220
1,150 J
4 680
1,560
8/28/2013
165
178
489
1,380
417
13,900
1,590
11/7/2013
214
131
331
969
651
14 400
1,570
2/27/2014
142
177
328
1,060
240
2,990
807
Page 1 of 4

Appendix C
Historical Groundwater Analytical Summary
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
Well
Sample Date
Benzene
Ethyl
benzene
Toluene
y enes
(Total)
MTBE
Sulfate
Carbon
dioxide
NC GCL:
5,000
84,500
260,000
85,500
20,000
NE
NE
INC 2L
1
600
600
500
20
250
NE
Units:
1
MW-5R
6/2/2014
256
436
_IL1
1040
2520
519 J
10/16/2014
9,950
1,390
4/23/2015
5,980
1,510
10/13/2015
5,790
4/28/2016
2,980
9/19/2016
2,880
3/3/2017
3 570
MW-6
5/12/2003
< 0.5
0.52 J
< 0.5
< 1
3
12/9/2003
2.3
0.64 J
1.1
3.6
17.6
12/9/2003
2.4
0.68 J
1.1
3.8
18
3/23/2006
0.76 J
0.59 J
3.6
2.8 J
1.1
5/8/2007
< 0.5
< 0.5
< 0.5
< 1
< 0.5
5/14/2008
<0.5
<0.8
<0.7
<0.8
<0.5
5/28/2009
< 0.06
< 0.05
< 0.06
< 0.14
0.17 J
5/27/2010
<0.11
0.13 J
0.38 J
0.46 J
<0.12
10/31/2011
8.7 J
11.7 J
27.5 J
132 J
<0.26 UJ
131
2,130
6/2/2014
17.6 J
59.4 J
31.6 J
99.4 J
783 J
MW-6I
5/12/2003
<0.5
<0.5
<0.5
1.11
<0.5
12/9/2003
< 2.5
< 2.5
< 2.5
< 5
< 2.5
3/23/2006
49.7
18.9
48.7
443
3,560
5/8/2007
< 25
< 25
< 25
< 50
6,910
5/14/2008
5.2J
<2
<1.8
<2
3,400
5/28/2009
2.5
<0.05
<0.06
<0.14
1,150
5/27/2010
1.6 J
< 1.1
< 1.1
< 3.2
492
10/31/2011
0.41 J
< 0.36
< 0.32
< 0.75
122
< 1
76.1
6/2/2014
< 0.1
< 0.1
< 0.1
< 0.2
3.3
MW 8
3/23/2006
671
1,340
1,230
8,100
124
5/8/2007
1,160
799
196
2,990
1,440
5/14/2008
600
1,800
700
3,000
190
5/28/2009
1,390
2,050
357
3,310
1,560
5/27/2010
8,570
2,870
31,700
15,700
6,260
10/31/2011
8,000
3,180
32,100
17,200
3,170
<1
<5
5/22/2012
8,270
3,360
36,400 J
17,800
3,920
< 5
119
6/15/2012 «1
726
47 J
760
242 J
96.3 J
4,760
22,200
7/9/2012
4,540 J
1,870 J
17,100 J
10,800 J
1,530 J
6 570
4,500
8/14/2012
4,370
1,610
19,300
8,780
2,000
7,010
1,560
MW-8R
9/19/2012
4,780
1,800
20,900
10,400
2,600
6,700
1,100
12/5/2012
7,760
2,440
31,900
13,800
4,560
2,410
635
2/26/2013
7,310
2,480
30,500
13,400
4,530
959
590
5/31/2013
6,540
3,040
30,500
12,500
4,200
439
437
8/28/2013
1,600
628
5,390
3,990
1,380
4 770
703
11/7/2013
1,130
329
2,440
1,830
1,770
7,460
766
2/27/2014
1,020
1 603
3,200
3,430
1,190
7 670
940
6/2/2014
1,360 J
680 J
3,510 J
3,330 J
2,110 J
6/2/2014 (1)
1,540
556 J
3,650
2,630 J
2,640 J
--
10/16/2014
3,310
883
9,070
4,990
3,910
3,560
842
4/23/2015
2,050
812
10/13/2015
1,600
4/29/2016
1,640
9/19/2016
1,330
3/3/2017
1,720
5/ 12/2003
< 0.5
< 0.5
< 0.5
< 1
0.52 J
12/9/2003
< 0.5
< 0.5
< 0.5
< 1
5.9
3/23/2006
< 0.5
< 0.5
< 0.5
< 1
< 0.5
5/8/2007
< 0.5
< 0.5
< 0.5
< 1
< 0.5
MW-14
5/14/2008
<0.5
<0.8
<0.7
<0.8
<0.5
5/28/2009
< 0.06
< 0.05
0.077 J
< 0.14
< 0.06
5/27/2010
<0.11
<0.11
<0.11
<0.32
<0.12
10/31/2011
< 0.13
< 0.15
< 0.42 U
< 0.3
< 0.13
43.2
< 5
6/3/2014
<0.1
<0.1
<0.1
<0.2
<0.1
Page 2 of 4

Appendix C
Historical Groundwater Analytical Summary
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
Well
Sample Date
Benzene
Ethyl
benzene
Toluene
y enes
(Total)
MTBE
Sulfate
Carbon
dioxide
NC GCL:
5,000
84,500
260,000
85,500
20,000
NE
NE
INC 2L
1
600
600
500
20
250
NE
Units:
1
m 1
m
MW-15
3/23/2006
0.63 J
2.1
_IL1
<0.5
18.6
1.6
5/8/2007
< 0.5
< 0.5
< 0.5
2.2 J
< 0.5
5/14/2008
<0.5
<0.8
<0.7
3.7J
<0.5
5/27/2010
<0.11
<0.11
<0.11
<0.32
<0.12
10/31/2011
<0.13
<0.15
<0.13
<0.3
<0.13
<1
<5
6/3/2014
<0.1
<0.1
<0.1
<0.2
<0.1
10/16/2014
<0.1
<0.1
<0.1
<0.2
<0.1
MW-16
3/23/2006
<2.5
90.8
15.8
836
2.8J
5/14/2008
<0.5
160
15
1,600
4.1 J
5/27/2010
3.6
54.7 J
5.1
525 J
1.3
10/31/2011
< 0.65
17.2
< 1.4 U
321
< 0.65
194
< 5
11/7/2013
55.4
<5
6/3/2014
< 0.1
25
0.92
417 J
< 0.1
MW-17
5/13/2003
57.7
<0.5
<0.5
<1
69
5/13/2003
40.8
<0.5
<0.5
<1
63.3
12/9/2003
6.6
0.65 J
< 0.5
1 < 1
80.6
3/23/2006
1
<0.5
<0.5
<1
58.9
5/8/2007
< 0.5
< 0.5
< 0.5
< 1
17.4
5/14/2008
3.7J
<0.8
<0.7
<0.8
19
5/28/2009
7
< 0.05
0.076 J
< 0.14
14.5
5/27/2010
5.7
< 0.11
< 0.11
< 0.32
12.4
10/31/2011
0.51
0.16 J
< 0.81 U
0.57 J
8.9
< 1
422
6/3/2014
< 0.1
< 0.1
< 0.1
< 0.2
4.1
10/31/2011
3,140
998
11,100
8,950
1,140
8.2
446
5/22/2012
2,280
2,790
18,200
12,000
789
< 5
307
6/15/2012 «1
373
910
4,800
3,910
114
10,600
3,410
7/9/2012
1,730 J
2,170 J
15,000 J
9,750 J
676 J
2 300
835
8/14/2012
3,020
2,990
24,400
12,800
1,090
758
580
9/19/2012
3,190
3,090
22,600
14,000
1,240
322
542
12/5/2012
3,370
2,970
20,100
12,800
1,380
32
1 436
2/26/2013
2,510
2,970
10,100
8,690
1,140
13.8
500
5/31/2013
2,780
3,070
8,210
5,740
1,000
83.3
475
MW-18
8/28/2013
182
368
730
1,660
139
7 850
21230
11/7/2013
1,140
727
4,910
3,250
694
2,640
1,370
2/27/2014
16.6
109
20.2
45.8
18.5
4 310
1,270
6/2/2014
26.2 J
125 J
37.5 J
31.6 J
37.4 J
10/16/2014
359
388
244
138
364
1,540
513
4/23/2015
780
1,100
10/13/2015
516
4/29/2016
79.4
9/19/2016
377
3/3/2017
295
Page 3 of 4

Appendix C
Historical Groundwater Analytical Summary
Former BP Service Station No. 24163
381 Knollwood Street
Winston-Salem, Forsyth County, North Carolina
Well
Sample Date
Benzene
Ethyl
benzene
Toluene
y enes
(Total)
MTBE
Sulfate
Carbon
dioxide
NC GCL:
5,000
84,500
260,000
85,500
20,000
NE
NE
INC 2L
1
600
600
500
20
250
NE
Units:
1
m 1
m
MW-19
10/31/2011
2,390
1,380
_IL1
8,790
7,040
5,160
3.7
425
5/22/2012
2,700
1 1,560
14,200
1 7,940
1 4,880
< 5
310
6/15/2012 (2)
4,020
1,440
18,200
7,940
3,290
1,090
6,520
7/9/2012
5 130
2,910
30,400 J
16,300
5,330
232
991
8/14/2012
2,420
1,650
14,200
8,370
4,090
469
1,080
9/19/2012
2,090
1,630
12,900
8,640
3,960
260
690
12/5/2012
2,320
1,810
15,200
10,400
4,010
58.8
588
2/26/2013
2,210
1,110
10,600
6,990
3,890
169
503
5/31/2013
1,830
1 894
8,820
1 5,250
1 3,120
1530
606
8/28/2013
2,710 J
1,190 J
13,100
7,420 J
3,240 J
2,660
525
11/7/2013
2,020
984
9,850
5,620
2,260
2 890
255
2/27/2014
2,550
1,400
10,900
7,880
3,320
2 790
322
6/2/2014
2,370
1,260
11,900
7,260
2,830
10/16/2014
2,340
632
4/23/2015
2 540
514
10/13/2015
1 960
4/28/2016
1,780
9/19/2016
1,270
3/3/2017
941
Notes:
t11 Field duplicate
(2) Alkalinity, sulfate, and carbon dioxide samples were collected 6/14/2012 and volatile organic analysis samples
were collected 6/15/12.
-" - Not sampled or analyzed
< - Not detected at the specified detection limit
µg/l - Micrograms per Liter
GCL - Gross Contamination Level
2L - North Carolina Groundwater Quality (2L) Standard
J - Estimated value
mg/l - Milligrams per Liter
MTBE - Methyl tert-Butyl Ether
NE - Not established
U - Not present above the associated level; blank contamination exists
UJ - Not detected and the detection limit is estimated
BOLD text indicates 2L exceedance
-Bold cell with green highlight indicates GCL exceedence
Activated sodium persulfate injections were performed at the site from June 4, 2012, to June 9, 2012, and from June
3, 2013, to June 6, 2013.
Page 4 of 4

04ARCADIS5deign&Consultancy
for naturaland
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