HomeMy WebLinkAboutAS-243_3701_CA_MRP_20170927FEDERAL/STATE-LEAD MONITORING REPORT
Lewis Service Station (Incident # 3701)
4733 Fallston Road
Fallston, Cleveland County, North Carolina
September 27, 2017
Terracon Project No. 71179012
Prepared for:
North Carolina Department of Environmental Quality
Division of Waste Management
Raleigh, North Carolina
Prepared by:
Terracon Consultants, Inc.
Charlotte, North Carolina
Terracon Consultants, Inc. 2020-E Starita Road Charlotte, NC 28206
P 704-509-1777 F 704-509-1888 terracon.com
September 27, 2017
Mr. Mark Petermann
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Email: mark.petermann@ncdenr.gov
Re: Federal/State-Lead Monitoring Report
Lewis Service Station
4733 Fallston Road
Fallston, Cleveland County, North Carolina
UST Incident Number: 3701
Terracon Project No. 71179012
Dear Mr. Petermann:
Terracon Consultants, Inc. (Terracon) is pleased to submit this Federal/State-Lead Monitoring
Report for the above referenced property. This report has been prepared in general accordance with
North Carolina Department of Environmental Quality (NCDEQ), UST Section Guidelines for
Assessment and Corrective Action for UST Releases, dated July 15, 2008, revised December 2013
and Task Authorization No. 01, approved on July 10, 2017.
If you have any questions regarding this report or the assessment activities, please contact us at
704-509-1777.
Sincerely,
Terracon Consultants, Inc.
Haley E. Hindes, GIT Christopher L. Corbitt, PG
Field Geologist Senior Geologist
Flora J. D’Souza, CHMM
Senior Scientist
Attachments
Table of Contents
A. SITE INFORMATION................................................................................................ 1
B. EXECUTIVE SUMMARY .......................................................................................... 2
C. SITE HISTORY AND CHARACTERIZATION ........................................................... 4
C.1 Site Setting ....................................................................................................................................... 4
C.2 Release Summary ........................................................................................................................... 4
C.3 Previous Investigations .................................................................................................................. 5
C.4 Water Supply Wells ......................................................................................................................... 5
C.5 Surface Water .................................................................................................................................. 5
C.6 Land Use Information ..................................................................................................................... 5
D. ASSESSMENT INFORMATION ............................................................................ 6
D.1 Site Geology and Hydrogeology ......................................................................................................... 6
D.2 Sampling Activities ......................................................................................................................... 7 D.2.1 Free Product Evaluation ................................................................................................................ 7
D.2.2 Groundwater Sampling Activities .................................................................................................. 7
D.2.3 Analytical Results .......................................................................................................................... 7
E. CONCLUSIONS AND RECOMMENDATIONS ..................................................... 8
FIGURES
Figure 1: Site Location Map
Figure 2: Site Plan
Figure 3: Water Supply Well Location Map
Figure 4: Groundwater Analytical Results
TABLES
Table 1: Historical UST Information
Table 2: Water Supply Well Information
Table 3: Summary of Groundwater Analytical Results
Table 4: Monitoring Well Construction Information and Historical Groundwater
Elevations
Table 5: Conceptual Site Model
APPENDIX
Appendix A: Laboratory Analytical Results and Chain of Custody Forms
Appendix B: Field Notes
Appendix C: Photographs
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 1
FEDERAL/STATE-LEAD MONITORING REPORT
A. SITE INFORMATION
Date of Report: September 27, 2017
NCDEQ Incident No: 3701
Facility ID: Unknown
Site Name: Lewis Service Station
Site Location: 4733 Fallston Road
Fallston, Cleveland County, North Carolina
Latitude: N 35.428201”
Longitude: W -81.501616
UST Owner/Operator: Petroleum World, Inc.
681 NC 120 Highway
Mooresboro, North Carolina 28114
Current Property Owner: Cool Cycle, Inc.
PO Box 766
Fallston, North Carolina 28042
Current Property
Occupant: Cool Cycle, Inc.
Consultant: Terracon Consultants, Inc. (Contact: Flora D’Souza)
2020-E Starita Road
Charlotte, North Carolina 28206
(704) 509-1777
Laboratory: Con-test Analytical (NCDEQ No. 25703)
39 Spruce Street
East Longmeadow, Massachusetts 01028
413-525-2332
Release Information: Release Discovery Date: December 27 and 28, 1994
Estimated Quantity: Unknown
Cause of Release: Unknown
Source of Release: Former gasoline UST system
Currently Active Tanks: None – (2) 1,000-gallon gasoline USTs
abandoned in place and (1) 1,000-gallon kerosene UST removed from
the site.
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 2
I, Christopher L. Corbitt, a Licensed Geologist for Terracon Consultants, Inc., do certify that the
information contained in this report is correct and accurate to the best of my knowledge.
Christopher L. Corbitt, L.G.
NC License No. 1015
Terracon Consultants, Inc. is licensed to practice geology/engineering in North Carolina. The
certification number of the corporation is F-0869.
B. EXECUTIVE SUMMARY
The purpose of this report is to evaluate the current status of the groundwater quality at Lewis
Service Station (Incident No. 3701). Terracon completed this report to summarize the findings of
assessment activities performed on August 15, 2017. The site is located at 4733 Fallston Road in
Fallston, Cleveland County, North Carolina in an area developed as commercial. The site is
currently occupied by Cool Cycle, Inc.
Based on regulatory file review information, the site formerly operated two 1,000-gallon gasoline
USTs, one 1,000-gallon kerosene UST, and two aboveground storage tanks (ASTs) related to on-
site fueling operations. A potential release was discovered on December 27 and 28, 1994. The
suspected release was from the 1,000-gallon gasoline UST located near the southeastern corner of
the on-site building. Reportedly, the two 1,000-gallon gasoline USTs were abandoned in place and
the 1,000-gallon kerosene UST was removed from the site.
Terracon mobilized to the site on August 15, 2017 to conduct groundwater sampling. Prior to sample
collection, Terracon gauged the groundwater levels in monitoring wells MW-1, RW-1, and VMW-1.
Prior to sampling, the wells were purged a minimum of three well volumes. While purging, well MW-
1 went dry. After allowing the water to recharge to 90% of its original water column length, Terracon
collected a sample. During this sampling event, depth to groundwater in the monitoring wells
ranged from approximately 26.60 feet (well RW-1) to 26.97 feet (well VMW-1) below ground surface
(bgs). Water samples collected from the wells were submitted for laboratory analysis of volatile
organic compounds (VOCs) by Standard Method 6200, including MTBE, IPE and EDB.
According to the laboratory analytical report, the following constituents were detected at
concentrations that exceed their respective 15A NCAC 2L standards in well MW-1; benzene (1,800
micrograms per liter [µg/L]), isopropylbenzene (110 µg/L), 1,2-dichloroethane (63 µg/L),
ethylbenzene (1,200 µg/L), n-propylbenzene (290 µg/L), MTBE (1,000 µg/L), 1,2,4-trimethylbenzene
(3,100 µg/L), 1,3,5-trimethylbenzene (830 µg/L), toluene (1,500 µg/L), naphthalene (430 µg/L), and
total xylenes (3,800 µg/L).
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 3
The following constituents were detected in well VMW-1 at concentrations that exceed their
respective 2L standards; benzene (2,400 µg/L), MTBE (14,000 µg/L), diisopropyl ether (340 µg/L),
naphthalene (310 µg/L), and 1,2-dichloroethane (380 µg/L).
Benezene (5,900 µg/L) was detected in well RW-1 above its Gross Contamination Level (GCL) of
5,000 µg/L. The following constituents were detected in well RW-1 above their respective 2L
standards; isopropylbenzene (79 µg/L), n-propylbenzene (170 µg/L ), ethylbenzene (1,100 µg/L),
total xylenes (1,940 µg/L), MTBE (5,800 µg/L), diisopropyl ether (190 µg/L), naphthalene (490 µg/L),
1,2-dicholoethane (200 µg/L), 1,2,4-trimethylbenzene (1,900 µg/L), and 1,3,5-trimethylbenzene (460
µg/L).
Various other petroleum constituents were detected in wells MW-1, VMW-1, and RW-1 at
concentrations below their respective 2L standards.
Based on information obtained during the completion of these assessment activities, Terracon
provides the following conclusions and findings.
Free product was not encountered at the site.
Benzene was detected in monitoring well RW-1 at a concentration that exceeds its GCL.
Benzene, isopropylbenzene, n-propylbenzene, toluene, ethylbenzene, total xylenes, MTBE,
naphthalene, 1,2-dichloroethane, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene were
detected in monitoring well MW-1 at concentrations that exceed their respective 2L standards.
Benzene, MTBE, diisopropyl ether, naphthalene, and 1,2-dichloroethane were detected in well
VMW-1 at concentrations that exceed their respective 2L standards.
Isopropylbenzene, n-propylbenzene, ethylbenzene, total xylenes, MTBE, diisopropyl ether,
naphthalene, 1,2-dichloroethane, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene were
detected in well RW-1 at concentrations that exceed their respective 2L standards.
Various other petroleum constituents were detected at the site at concentrations below their
respective 2L standards.
Historically, groundwater flow direction at the site was reportedly to the south, southeast, and
southwest.
There are reportedly two active water supply wells located within 1500 feet of the source area. The
nearest well (WSW-4) is located on the adjacent property to the west.
Generally, constituent concentrations appear to be increasing in on-site wells MW-1, VMW-1, and
RW-1.
The contaminant plume appears to be localized laterally but is apparently migrating downward as
shown by increased concentrations in well VMW-1.
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 4
Based on the findings of our assessment activities, the following comments and recommendations are
provided for the site.
Terracon recommends contacting the property owner of well WSW-4 to request abandonment.
Terracon recommends conducting an MMPE event at wells MW-1, VMW-1, and RW-1 in an
attempt to lower benzene concentrations below its GCL.
Terracon also recommends the on-site wells be sampled on an annual basis.
C. SITE HISTORY AND CHARACTERIZATION
The purpose of this report is to evaluate the current status of the groundwater quality at the former
Lewis Service Station site. Terracon completed this report to summarize the findings of assessment
activities performed on August 15, 2017. The site is located at 4733 Fallston Road in Fallston,
Cleveland County, North Carolina (Figure 1). This Federal/State-Lead Monitoring Report was
prepared for the site in response to a request by Mr. Mark Petermann, NCDEQ Incident Manager
with the Division of Waste Management, State Lead Program.
The Federal/State-Lead Monitoring Report was prepared in general accordance with the 15A NCAC
2L.0115 regulations and the NCDEQ Underground Storage Tank (UST) Section Guidelines for
Assessment and Corrective Action for UST Releases, dated July 15, 2008, revised December 2013,
under the supervision of Mr. Christopher L. Corbitt, a North Carolina registered professional
geologist (North Carolina License No. 1015).
C.1 Site Setting
The site is located in an area primarily developed as commercial. A park is located on the adjacent
property to the north and Tropical Creations is located on the adjacent property to the south. The
site is bound to the east by Fallston Road and a residence is located on the adjacent property to the
west. Specific land uses are further described in Section C.6 below.
C.2 Release Summary
Based on regulatory file review information, the site formerly operated two 1,000-gallon gasoline
USTs, one 1,000-gallon kerosene UST, and two ASTs related to on-site fueling operations. A
potential release was discovered on December 27 and 28, 1994. The suspected release was from
the 1,000-gallon gasoline UST located near the southeastern corner of the on-site building.
Historical UST information is provided in Table 1.
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 5
C.3 Previous Investigations
Based on regulatory file review information, the site formerly operated two 1,000-gallon gasoline
USTs, one 1,000-gallon kerosene UST, and two ASTs related to on-site fueling operations. A
potential release was discovered on December 27 and 28, 1994. The suspected release was from
the 1,000-gallon gasoline UST located near the southeastern corner of the on-site building.
Reportedly, the two 1,000-gallon gasoline USTs were abandoned in place and the 1,000-gallon
kerosene UST was removed from the site.
In May 2016, Shield Engineering Inc. (Shield) conducted a 96-hour Mobile Multiphase Extraction
(MMPE) event at on-site wells MW-1, VMW-1 and RW-1. Approximately 3,600 gallons of dissolved
phase impacted groundwater were recovered during the MMPE event. An estimated 32 gallons of
free product (gasoline) was removed from the site as vapor. A subsequent well sampling event on
June 14, 2016 indicated contaminant concentrations had generally decreased as a result of the
MMPE event. Constituent concentrations were below their respective GCLs but remained above
their respective 2L standards.
C.4 Water Supply Wells
Two water supply wells were identified within 1,500 feet of the source area as reported by Shield in
2016. Well WSW-4, located on the adjacent property to the west, is used to water vegetation in a
nearby park located north of the site. Well WSW-Cotton Gin, located between 500 and 1,000 feet
east of the source area, is reportedly used for washing vehicles and other machinery. Municipal
water is available in the area. Well information is summarized in Table 2. The approximate
locations of the identified water supply wells are shown on Figure 3.
C.5 Surface Water
An unnamed tributary of Buffalo Creek is located approximately 1,100 feet northeast and down-
gradient of the site. Surface waters are depicted on Figure 1.
C.6 Land Use Information
The former gas station site is presently occupied by Cool Cycle, Inc., a motorcycle repair shop. The
front of the property contains the former dispenser island beneath an overhead canopy structure.
Two apparent storage buildings are located at the rear (west) of the property. Terracon was not
provided access to the rear of the property; however, minor oil stains and typical motorcycle repair
operations were overserved within the on-site building. The adjoining properties to the east, across
Fallston Road, and south are commercial businesses. The adjoining property to the west is
developed as a single-family residence and a storage building. The adjoining property to the north is
a city park. The site and surrounding properties are depicted in Figures 1 and 2.
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 6
D. ASSESSMENT INFORMATION
D.1 Site Geology and Hydrogeology
The following resources were reviewed to evaluate site-specific geological and hydrogeological
characteristics.
Lawndale, North Carolina, USGS 7.5-minute topographic map, dated 2002 (Figure 1).
Geologic Map of North Carolina, dated 1985.
The Geology of the Carolinas, Carolina Geological Society Fiftieth Anniversary Volume, edited by
J. Wright Horton, Jr., and Victor A. Zullo, The University of Tennessee Press, dated 1991.
Soil Survey of Cleveland County, North Carolina, US Department of Agriculture, Natural
Resources Conservation Service, Web Soil Survey via the Internet,
http://websoilsurvey.nrcs.usda.gov/app/.
The site is located within the Inner Piedmont Belt of the Piedmont Physiographic Province. The
Piedmont Physiographic Province generally consists of low to medium elevation, rounded hills and
long rolling northeast to southwest trending ridges with incised creeks and river channels.
Underlying bedrock in the site area consists of biotite gneiss and schist.
In-place chemical and physical weathering of parent rocks typically form residual soils in the
Piedmont region. Weathering is facilitated by the presence of fractures, joints, and less resistant
minerals in the rock. In areas not altered by erosion, alluvial deposition or the activities of man, the
typical residual soil profile consists of clay-rich unconsolidated materials at the surface, transitioning
to sandy silts and silty sands at depth. Typically, the boundary between soil and rock is not sharply
defined. This transitional zone is termed “partially weathered rock” or saprolite. Information obtained
from the Web Soil Survey for Cleveland County, depicts soils at the site as Cecil-Urban land
complex (CeB).
In the Piedmont, groundwater generally occurs in pore spaces within soils and in the structural
features present in the underlying rock (i.e. joints, fractures, and faults). Recharge to the water table
is primarily by precipitation infiltrating the surficial soils and percolating downward under the
influence of gravity to the water table (vadose zone). Typically, the water table is not a level surface,
but a subdued reflection of the land surface. The depth to the water table is not consistent and is
dependent upon several factors that include the amount of rainfall, permeability of the soil, the
extent of fracturing in the underlying rock and the influences of groundwater pumping. Groundwater
typically flows in directions parallel to the ground surface and under the influence of gravity, migrates
to discharge points such as surface water features, the toes of slopes or natural springs.
Fluctuations in the depth of the water table can be expected depending on variations in precipitation,
surface water run-off and other factors not evident at the time of our subsurface exploration.
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 7
Normally, the highest levels of the water table occur in late winter and spring and the lowest levels
occur in the late summer and fall. Based on an interpreted groundwater flow direction from historical
data, groundwater is expected to flow to the south, southeast, and southwest from the site.
D.2 Sampling Activities
D.2.1 Free Product Evaluation
Free product was not encountered at the site.
D.2.2 Groundwater Sampling Activities
Terracon mobilized to the site on August 15, 2017 to conduct groundwater sampling activities. Prior
to sample collection, Terracon gauged the groundwater levels in monitoring wells MW-1, RW-1, and
VMW-1. Prior to sampling, the wells were purged a minimum of three well volumes. While purging,
well MW-1 went dry. After allowing the water to recharge to 90% of its original water column length,
Terracon collected a sample. Terracon sampled the selected wells based on historical groundwater
contamination levels within the previously mentioned monitoring wells. During this sampling event,
depth to groundwater in the monitoring wells ranged from approximately 26.60 feet (well RW-1) to
26.97 feet (well VMW-1) bgs. The approximate locations of the monitoring wells are shown on
Figure 2. The historical groundwater flow direction is generally to the east. Copies of Terracon’s
field notes are included in Appendix B. Current and historical groundwater depth measurements
are provided in Table 4.
The groundwater samples were placed in laboratory-supplied glassware, labeled and stored in an
ice-packed cooler. The samples, along with chain-of-custody documentation, were delivered to Con-
test Analytical Laboratory in East Longmeadow, Massachusetts for analysis of VOCs by Standard
Method 6200B, including MTBE, IPE and EDB.
D.2.3 Analytical Results
Groundwater Monitoring Wells
According to the laboratory analytical report, the following constituents were detected at
concentrations that exceed their respective 15A NCAC 2L standards in well MW-1; benzene (1,800
micrograms per liter [µg/L]), isopropylbenzene (110 µg/L), 1,2-dichloroethane (63 µg/L),
ethylbenzene (1,200 µg/L), n-propylbenzene (290 µg/L), MTBE (1,000 µg/L), 1,2,4-trimethylbenzene
(3,100 µg/L), 1,3,5-trimethylbenzene (830 µg/L), toluene (1,500 µg/L), naphthalene (430 µg/L), and
total xylenes (3,800 µg/L).
The following constituents were detected in well VMW-1 at concentrations that exceed their
respective 2L standards; benzene (2,400 µg/L), MTBE (14,000 µg/L), diisopropyl ether (340 µg/L),
naphthalene (310 µg/L), and 1,2-dichloroethane (380 µg/L).
Benezene (5,900 µg/L) was detected in well RW-1 above its GCL of 5,000 µg/L. The following
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 8
constituents were detected in well RW-1 above their respective 2L standards; isopropylbenzene (79
µg/L), n-propylbenzene (170 µg/L ), ethylbenzene (1,100 µg/L), total xylenes (1,940 µg/L), MTBE
(5,800 µg/L), diisopropyl ether (190 µg/L), naphthalene (490 µg/L), 1,2-dicholoethane (200 µg/L),
1,2,4-trimethylbenzene (1,900 µg/L), and 1,3,5-trimethylbenzene (460 µg/L).
Various other constituents were detected in wells MW-1, VMW-1, and RW-1 at concentrations
below their respective 2L standards. The groundwater analytical results from the monitoring wells
are summarized in Table 3 and are depicted on Figure 4. A copy of the laboratory analytical report
is provided in Appendix A.
E. CONCLUSIONS AND RECOMMENDATIONS
Based on information obtained during the completion of these assessment activities, Terracon
provides the following conclusions and findings.
Free product was not encountered at the site.
Benzene was detected in monitoring well RW-1 at a concentration that exceeds its GCL.
Benzene, isopropylbenzene, n-propylbenzene, toluene, ethylbenzene, total xylenes, MTBE,
naphthalene, 1,2-dichloroethane, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene were
detected in monitoring well MW-1 at concentrations that exceed their respective 2L standards.
Benzene, MTBE, diisopropyl ether, naphthalene, and 1,2-dichloroethane were detected in well
VMW-1 at concentrations that exceed their respective 2L standards.
Isopropylbenzene, n-propylbenzene, ethylbenzene, total xylenes, MTBE, diisopropyl ether,
naphthalene, 1,2-dichloroethane, 1,2,4-trimethylbenzene, and 1,3,5-trimethylbenzene were
detected in well RW-1 at concentrations that exceed their respective 2L standards.
Various other petroleum constituents were detected at the site at concentrations below their
respective 2L standards.
Historically, groundwater flow direction at the site was reportedly to the south, southeast, and
southwest.
There are reportedly two active water supply wells located within 1500 feet of the source area
(WSW-4 and WSW-Cotton Gin). The nearest well (WSW-4) is located on the adjacent property to
the west. Both wells are up-gradient to the inferred direction of groundwater flow across from the
site.
Generally, constituent concentrations appear to be increasing in on-site wells MW-1, VMW-1, and
RW-1.
The contaminant plume appears to be localized laterally but is apparently migrating downward as
shown by increased concentrations in well VMW-1.
Lewis Service Station
Fallston, North Carolina
Project Number 71179012
Incident No. 3701
September 27, 2017
Responsive ■ Resourceful ■ Reliable 9
Based on the findings of our assessment activities, the following comments and recommendations are
provided for the site.
Terracon recommends conducting an MMPE event of wells MW-1, VMW-1, and RW-1 in an
attempt to lower benzene concentrations below its respective GCL.
Terracon also recommends the on-site wells be sampled on an annual basis.
FIGURES
SITE LOCATION MAP
Lewis Service Station (Incident No. 3701)
4733 Fallston Road
Fallston, Cleveland County, NC
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: LAWNDALE, NC (1/1/2002) and CHERRYVILLE, NC (1/1/2003).
2020 Starita Rd Ste E
Charlotte, NC 28206-1298
71179012
Project Manager:
Drawn by:
Checked by:
Approved by:
HEH
CLC
CLC
1”=2,000’
71179012.1
September 2017
Project No.
Scale:
File Name:
Date: 1
Figure FJD
APPROXIMATE
SITE BOUNDARY
2
Figure
DIAGRAM IS FOR GENERAL LOCATION ONLY,
AND IS NOT INTENDED FOR CONSTRUCTION
PURPOSES 2020-E Starita Road
Charlotte, NC
Site PlanProject Manager:
Drawn by:
Checked by:
Approved by:
FJD Project No.
File Name:
Date:
Scale:
71179012
HEH
September 2017CLC
CLC 71179012.2
Lewis Service Station (Incident #3701)
4733 Fallston Road
Fallston, Cleveland County, North Carolina
denotes approximate site
boundary
denotes groundwater
monitoring well.
denotes water
supply well
WSW-4
1” = 35 ft.
MW-5
Not Sampled
Stamey Store
Incident No. 12004
Canopy
MW-4
Not Sampled
MW-6
Not Sampled
MW-3
Not Sampled
MW-2
Not Sampled
Former
WSW-3
Former
WSW-2
MW-7
Not SampledMW-8 Not Sampled NC HIGHWAY 18denotes approximate fence line
Shed
Shed
Cool Cycle, Inc. VMW-1
RW-1
SVE-1
MW-1
Former 1,000-gallon
gasoline USTs
Former 1,000-gallon
gasoline USTs
(abandoned in place)
Former 1,000-gallon
kerosene UST 550-gallon gasoline
USTs (not in use)
WATER SUPPLY WELL LOCATION MAP
7327-G West Friendly Ave
Greensboro, NC
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS
NOT INTENDED FOR CONSTRUCTION PURPOSES
3
Figure
denotes water supply well
1,500 ft. Radius
(from release location)
1,000 ft. Radius
(from release location)
500 ft. Radius
(from release location)
Lewis Service Station (Incident #3701)
4733 Fallston Road
Fallston, Cleveland County, North Carolina
Project Manager:
Drawn by:
Checked by:
Approved by:
HEH
Project No.
File Name:
Date:
Scale:
71179012
HEH
September 2017CLC
CLC
1”~ 375’
71179012.3
WSW-4
WSW Cotton Gin
4
Figure
DIAGRAM IS FOR GENERAL
LOCATION ONLY, AND IS NOT
INTENDED FOR CONSTRUCTION
PURPOSES 2020-E Starita Road
Charlotte, NC
Groundwater Analytical ResultsProject Manager:
Drawn by:
Checked by:
Approved by:
FJD
Project No.
File Name:
Date:
Scale:
71179012
HEH
September 2017CLC
CLC 71179012.5
Lewis Service Station (Incident #3701)
4733 Fallston Road
Fallston, Cleveland County, North Carolina
denotes approximate site
boundary
denotes groundwater
monitoring well.
denotes water
supply well
WSW-4
1” = 35 ft.
MW-5
Not Sampled
Canopy
MW-4
Not Sampled
MW-6
Not Sampled
MW-3
Not Sampled
MW-2
Not Sampled
Former
WSW-3
Former
WSW-2
MW-7
Not SampledMW-8 Not Sampled NC HIGHWAY 18denotes approximate fence line
Shed
Shed
Cool Cycle, Inc. SVE-1
Former 1,000-gallon
gasoline USTs
550-gallon gasoline
USTs (not in use)
Sample ID: MW-1
Groundwater Sample
6200 –Benzene: 1,800 µg/L
n-Butylbenzene: 46 µg/L
sec-Butylbenzene: 24 µg/L
1,2-Dichloroethane: 63 µg/L
Diisopropyl ether: 46 µg/L
Ethylbenzene: 1,200 µg/L
Isopropylbenzene: 110 µg/L
p-Isopropyltoluene: 16 µg/L
MTBE: 1,000 µg/L
Naphthalene: 430 µg/L
n-Propylbenzene: 290 µg/L
Toluene: 1,500 µg/L
1,2,4-Trimethylbenzene: 3,100 µg/L
1,3,5-Trimethylbenzene: 830 µg/L
Total Xylenes: 3,800 µg/L
*Values above 2L Standards are in bold.
Sample ID: RW-1
Groundwater Sample
6200 –Benzene: 5,900 µg/L
sec-Butylbenzene: 13 µg/L
1,2-Dichloroethane: 200 µg/L
Diisopropyl ether: 190 µg/L
Ethylbenzene: 1,100 µg/L
Isopropylbenzene: 79 µg/L
MTBE: 5,800 µg/L
Naphthalene: 490 µg/L
n-Propylbenzene: 170 µg/L
Toluene: 160 µg/L
1,2,4-Trimethylbenzene: 1,900 µg/L
1,3,5-Trimethylbenzene: 460 µg/L
Total Xylenes: 1,940 µg/L
*Values above 2L Standards are in bold.
*Values above GCL are italicized.
Sample ID: VMW-1
Groundwater Sample
6200 –Benzene: 2,400 µg/L
1,2-Dichloroethane: 380 µg/L
Diisopropyl ether: 340 µg/L
Ethylbenzene: 210 µg/L
Isopropylbenzene: 58 µg/L
MTBE: 14,000 µg/L
Naphthalene: 310 µg/L
n-Propylbenzene: 48 µg/L
1,2,4-Trimethylbenzene: 270 µg/L
1,3,5-Trimethylbenzene: 130 µg/L
Total Xylenes: 140 µg/L
*Values above 2L Standards are in bold.
TABLES
TABLE 1
Historical UST Information
Lewis Service Station
Fallston, North Carolina
Terracon Project No. 71179012
NCDEQ Incident No. 3701
Contents Capacity (gallons)Date Installed Date Closed Closed/Active Release from
System
Gasoline 1,000 Unknown Unknown Abandoned in place Yes
Gasoline 1,000 Unknown Unknown Abandoned in place No
Kerosene 1,000 Unknown Unknown Removed No
TABLE 2
Water Supply Well Information
Lewis Service Station
Fallston, North Carolina
Terracon Project No. 71179012
NCDEQ Incident No. 3701
Well ID Property Owner Property Address Mailing Address Distance/Direction from
source area (in feet)Well Status/Use Parcel No.Notes
WSW-4 Claude & Neveen Falls 772 East Stage Coach Trail
Fallston, NC
PO Box 1632
Lincolnton, NC 28092 170 ft / west Active 34672 Used to water park located north of the site
WSW-Cotton Gin John & Ashley Herndon 815 East Stage Coach Tail
Fallston, NC
PO Box 652
Fallston, NC 28042 715 ft / east Active 34559 Used for cleaning vehicles
TABLE 3
Summary of Groundwater Analytical Results
Lewis Service Station
Fallston, North Carolina
Terracon Project No. 71179012
NCDEQ Incident No. 3701
Contaminant of Concern →
Well/Sample
I.D.
Date Collected
(mm/dd/yy)
4/21/1995 7000 NR NR NR NR NR 19000 2400 12000 10000 720 NA 150 NR NR 200
10/11/1995 17000 NR NR NR NR NR 41000 2800 18000 19000 1000 NA 820 NR NR 340
9/2/1999
3/8/2000
8/27/2001
2/22/2002
8/6/2002
2/12/2003
8/5/2003 2800 NR NR NR NR NR 10000 1200 12700 13000 ND NA ND NR NR ND
7/6/2012 6680 NR NR NR NR NR 19500 1910 14630 16600 198 467 193 NR NR 32.8
12/27/2012
6/11/2013 4040 NR NR NR NR NR 6200 1020 12030 19800 311 706 276 NR NR ND
11/13/2013 6890 NR NR NR NR NR 2420 1170 9230 8150 168 751 172 NR NR ND
4/24/2014 179 NR NR NR NR NR 542 206 1343 146 ND 179 ND NR NR ND
5/29/2015 850 NR NR NR NR NR 5520 670 5620 1020 23.1 420 33.1 NR NR 18.1
11/24/2015 2200 NR NR NR NR NR 2520 1190 7130 2640 57.4 545 66.3 NR NR ND
6/14/2016 580 NR NR NR NR NR 309 410 1388 245 9 174 10.9 NR NR 12.2
8/15/2017 1800 46 24 110 16 290 1500 1200 3800 1000 46 430 63 3100 830 <7.4
4/21/1995 2 NR NR NR NR NR 5 ND 13 ND 1.2 NA ND NR NR ND
10/11/1995 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
9/2/1999 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR NA
3/8/2000 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/27/2001 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR NA
2/22/2002
8/6/2002
2/12/2003 ND NR NR NR NR NR 3.3 1.3 4.8 ND ND ND ND NR NR ND
8/5/2003 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
7/6/2012 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/15/2017
4/21/1995 58 NR NR NR NR NR 7.2 13 27 1100 17 NA ND NR NR 0.1
10/11/1995 93 NR NR NR NR NR 4.7 21 36 710 20 NA 1.1 NR NR 0.08
9/2/1999 12 NR NR NR NR NR ND ND 11 360 25 ND NA NR NR NA
3/8/2000 14 NR NR NR NR NR ND 5 8.4 170 14 ND ND NR NR ND
8/27/2001 14 NR NR NR NR NR 18 10 21.9 110 3.3 22 ND NR NR NA
2/22/2002 50 NR NR NR NR NR ND 13 18.3 81 ND ND ND NR NR ND
8/6/2002
2/12/2003 1.8 NR NR NR NR NR 1.2 1.8 ND 38 ND ND ND NR NR NA
8/5/2003 ND NR NR NR NR NR ND ND ND 53 1.3 ND ND NR NR ND
7/6/2012 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/15/2017
10/11/1995 ND NR NR NR NR NR 3.7 ND ND 1.2 ND NA ND NR NR ND
9/2/1999 ND NR NR NR NR NR ND ND ND ND ND ND NA NR NR NA
3/8/2000 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/27/2001 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR NA
2/22/2002
8/6/2002
2/12/2003 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/5/2003 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
7/6/2012 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/15/2017
10/11/1995 ND NR NR NR NR NR ND ND ND 2 ND NA ND NR NR ND
9/2/1999 ND NR NR NR NR NR ND ND ND ND ND ND NA NR NR NA
3/8/2000 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/27/2001 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR NA
2/22/2002 5.2 NR NR NR NR NR ND ND 3 ND ND ND ND NR NR ND
8/6/2002 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
2/12/2003 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/5/2003 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
7/6/2012 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/15/2017
10/11/1995 450 NR NR NR NR NR 7.6 36 180 ND 4.3 NA 28 NR NR ND
9/2/1999 19 NR NR NR NR NR ND ND 13 ND ND ND NA NR NR ND
3/8/2000 15 NR NR NR NR NR ND ND 16.2 ND 1.3 ND 7.6 NR NR ND
8/27/2001 27 NR NR NR NR NR ND ND 24 ND 1.4 ND 8.3 NR NR ND
2/22/2002 23 NR NR NR NR NR ND ND 24 ND 1.6 ND 9.6 NR NR ND
8/6/2002
2/12/2003 12 NR NR NR NR NR 1 1.7 13 ND ND ND 5.8 NR NR ND
8/5/2003 17 NR NR NR NR NR ND 1.5 17.4 ND ND ND 4 NR NR ND
7/6/2012 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/15/2017
10/11/1995 ND NR NR NR NR NR ND ND ND ND ND NA ND NR NR ND
9/2/1999
3/8/2000
8/27/2001
2/22/2002
8/6/2002
2/12/2003
8/5/2003 ND NR NR NR NR NR ND ND ND ND ND NA ND NR NR ND
7/6/2012
8/15/2017
10/11/1995 ND NR NR NR NR NR 7 ND 1.8 ND ND NA ND NR NR ND
9/2/1999 ND NR NR NR NR NR ND ND ND ND ND ND NA NR NR NA
8/27/2001 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR NA
2/22/2002
8/6/2002
2/12/2003
8/5/2003 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
7/6/2012 ND NR NR NR NR NR ND ND ND ND ND ND ND NR NR ND
8/15/2017
10/11/1995 2.8 NR NR NR NR NR 3.4 ND 1.5 2.1 ND NA ND NR NR 0.19
8/27/2001 130 NR NR NR NR NR 48 24 168 27 3.5 4.4 15 NR NR NA
2/22/2002 490 NR NR NR NR NR ND ND 207 330 ND ND 22 NR NR ND
8/6/2002 4100 NR NR NR NR NR 3100 460 2400 5400 87 150 180 NR NR 29
2/12/2003 1800 NR NR NR NR NR 26 ND 170 690 ND 61 85 NR NR ND
8/5/2003 1300 NR NR NR NR NR 130 76 1410 2000 54 120 80 NR NR ND
7/6/2012 7250 NR NR NR NR NR 43 831 1321 24900 337 418 422 NR NR ND
12/27/2012 2170 NR NR NR NR NR ND ND ND 17200 363 ND 520 NR NR ND
6/11/2013 1530 NR NR NR NR NR ND ND ND 16000 355 ND 479 NR NR ND
11/13/2013 2660 NR NR NR NR NR 93.3 75.3 335 17100 293 ND 361 NR NR ND
4/24/2014 3400 NR NR NR NR NR 332 205 756 14400 279 ND 305 NR NR ND
5/29/2015 4480 NR NR NR NR NR ND 462 521 13600 235 545 259 NR NR ND
11/24/2015 1290 NR NR NR NR NR ND ND ND 16300 306 ND 350 NR NR ND
6/14/2016 2840 NR NR NR NR NR ND 112 243 12200 233 217 236 NR NR ND
8/15/2017 2400 <30 <26 58 <30 48 <34 210 140 14000 340 310 380 270 130 <30
2/22/2002 7700 NR NR NR NR NR 14000 1400 7400 12000 ND ND 360 NR NR ND
8/6/2002 12000 NR NR NR NR NR 20000 2400 8700 17000 260 400 400 NR NR 77
2/12/2003 7100 NR NR NR NR NR 8400 980 6100 6200 ND 280 250 NR NR ND
8/5/2003 3700 NR NR NR NR NR 4100 1400 8200 11000 ND ND 190 NR NR ND
7/6/2012 7310 NR NR NR NR NR 2970 2340 7390 23700 240 612 298 NR NR ND
12/27/2012 6470 NR NR NR NR NR 1360 1310 6810 21000 229 584 289 NR NR ND
6/11/2013 8280 NR NR NR NR NR 668 1360 4940 26900 401 568 353 NR NR ND
11/13/2013 7340 NR NR NR NR NR 669 1330 5110 20700 279 528 309 NR NR ND
4/24/2014 4320 NR NR NR NR NR 265 857 2750 8770 159 430 134 NR NR ND
5/29/2015 5460 NR NR NR NR NR 608 1240 3410 8290 151 662 185 NR NR ND
11/24/2015 6750 NR NR NR NR NR 287 860 3470 13500 246 452 215 NR NR ND
6/14/2016 2670 NR NR NR NR NR 234 804 1938 3090 78.8 412 67.1 NR NR ND
8/15/2017 5900 <15 13 79 <15 170 160 1100 1940 5800 190 490 200 1900 460 <15
1 70 70 70 25 70 600 600 500 20 70 6 0.4 400 400 0.02
5,000 6,900 8,500 25,000 11,700 30,000 260,000 84,500 85,500 20,000 70,000 6,000 400 28,500 25,000 50
Notes:
µg/L = Micrograms per liter
NA = Not analyzed
ND = Not detected at or above laboratory reporting limits.
NR=Not Reported
Contaminants that exceed the NCDEQ - NCAC 15A 2L Groundwater Standards are in BOLD.
GCL = Gross contamination levels for groundwater
Not Sampled
Not Sampled
MW-8
VMW-1
Not Sampled - Dry
Not Sampled
MW-7
Not Sampled
Not Sampled - Dry
Not Sampled - Dry
MW-5
Not Sampled
MW-6
Not Sampled - Dry
MW-3
Not Sampled - Dry
Not Sampled
MW-4
Not Sampled
GCL (ug/L)1,2-DichloroethaneNaphthaleneDiisopropyl EtherEthylbenzeneTotal XylenesNot Sampled
Not Sampled - Dry
Not Sampled
Not Sampled - Dry
MW-1
MW-2 Not Sampled
Not Sampled
Not Sampled - Dry
Not Sampled
RW-1
Contaminants that exceed their GCL are highlighted in yellow.
6200BAnalytical Method
BenzeneEDBTolueneMTBEn-Butylbenzenesec-ButylbenzeneIsopropylbenzenep-Isopropyltoluenen-Propylbenzene1,2,4-Trimethylbenzene1,3,5-Trimethylbenzene2L Standard (ug/L)
TABLE 4
Monitoring Well Construction Information
and Historical Groundwater Elevations
Lewis Service Station
Fallston, North Carolina
Terracon Project No. 71179012
NCDEQ Incident No. 3701
Well Id
Date
Installed
(mm/dd/yy)
Date Water
Level Measured
(mm/dd/yy)
Well Casing
Diameter
(in.)
Screen
Interval
(ft-TOC)
Depth of
Well
(ft-TOC)
Top of Casing
Elevation (ft.)
Depth to Water from
Top of Casing
(ft.)
Groundwater
Elevation (ft.)Comments
3/8/2000 25.16 72.46
8/27/2001 26.63 70.99
2/22/2001
8/6/2002
2/12/2003 27.14 70.48
8/5/2003 19.08 78.547/6/2012 26.86 70.7612/27/2012 27.91 69.715/6/2013 27.52 70.105/10/2013 23.01 74.616/11/2013 26.94 70.6810/14/2013 23.95 73.6710/18/2013 25.31 72.31
11/13/2013 24.25 73.37
4/24/2014 21.95 75.67
5/29/2015 23.02 74.60
11/24/2015 25.28 72.34
6/14/2016 22.53 75.09
8/15/2017 26.62 71.00
3/22/1996 17.53 79.33
3/8/2000 23.84 73.02
8/27/2001 25.83 71.03
2/22/2002
8/6/2002
2/12/2003 26.37 70.49
8/5/2003 17.97 78.89
7/6/2012 26.18 70.68
8/15/2017
3/22/1996 17.73 79.45
3/8/2000 24.00 73.18
8/27/2001 26.09 71.09
2/22/2002 27.66 69.52
8/6/2002
2/12/2003 26.51 70.67
8/5/2003 18.01 79.17
7/6/2012 26.40 70.78
8/15/2017
3/22/1996 17.22 79.99
3/8/2000 23.99 73.22
8/27/2001 26.28 70.93
2/22/2002 27.85 69.36
8/6/2002
2/12/2003 26.41 70.80
8/5/2003 17.69 79.52
7/6/2012 26.51 70.70
8/15/2017
3/22/1996 17.39 79.17
3/8/2000 23.30 73.26
8/27/2001 25.28 71.28
2/22/2002 26.76 69.80
8/6/2002 27.67 68.89
2/12/2003 25.53 71.03
8/5/2003 17.74 78.82
7/6/2012 25.63 70.93
8/15/2017
3/22/1996 19.72 77.91
3/8/2000 24.88 72.75
8/27/2001 26.42 71.21
2/22/2002 28.01 69.62
8/6/2002
2/12/2003 27.21 70.42
8/5/2003 20.13 77.50
7/6/2012 26.95 70.688/15/20173/22/1996 21.42 78.113/8/2000 26.95 72.588/27/2001 28.5 71.032/22/2002 28.99 70.548/6/20022/12/2003 28.9 70.63
8/5/2003 22.00 77.53
7/6/2012 28.83 70.70
8/15/2017
3/22/1996 18.44 78.97
3/8/2000 24.47 72.94
8/27/2001 26.15 71.26
2/22/2002 28.00 69.41
8/6/2002
2/12/2003 27.05 70.36
8/5/2003 18.89 78.52
7/6/2012 26.65 70.76
8/15/2017
3/22/1996 19.16 78.56
3/8/2000 25.06 72.66
8/27/2001 26.76 70.96
2/22/2002 28.60 69.12
8/6/2002 29.15 68.57
2/12/2003 27.56 70.16
8/5/2003 19.59 78.13
7/6/2012 27.28 70.44
12/27/2012 30.02 67.70
5/6/2013 28.05 69.67
5/10/2013 29.43 68.29
6/11/2013 27.30 70.42
10/14/213 24.34 73.38
10/18/2013 24.63 73.09
11/13/2013 24.63 73.09
4/24/2014 22.05 75.67
5/29/2015 23.43 74.29
11/24/2015 25.65 72.07
6/14/2016 22.92 74.80
8/15/2017 26.97 70.73
2/22/2002 28.22 69.16
8/6/2002 28.82 68.56
2/12/2003 27.15 70.23
8/5/2003 19.18 78.20
7/6/2012 26.84 70.54
12/27/2012 29.64 67.74
5/6/2013 27.56 69.82
5/10/2013 30.85 66.53
6/11/2013 26.68 70.70
10/14/2013 23.95 73.43
10/18/2013 24.91 72.47
11/13/2013 24.25 73.13
4/24/2014 22.47 74.91
5/29/2015 23.05 74.33
11/24/2015 25.27 72.11
6/14/2016 22.53 74.85
8/15/2017 26.60 70.80
7/6/2012 16.80 Not Measured
8/15/2017
7/6/2012 17.23 Not Measured
8/15/2017
Notes:
Depth of Well and Top of Casing elevation taken from Monitoring Report, Lewis Service Station dated June 29, 2016 by Shield Engineering, Inc.
Not Measured
UnknownMW-5 2 13-28 28 96.56
97.18 Dry
Not Measured
MW-4 2 13-28 28
29214-294/21/1995MW-3
97.21 Dry
Not Measured
10/2/1995
4/21/1995MW-1
96.86
Not Measured
Not Measured
Not Measured
2 13-28
97.62
Dry
Dry
28213-28
284/21/1995MW-2
10/3/1995MW-6
99.53210/3/1995MW-7
97.63 Dry
Not Measured
30
Dry
Not Measured
3015-30
15-302
13-282 Dry
Not Measured
UnknownMW-8
97.7VMW-1
97.41
10/5/1995
10/28/2001RW-1 4015-406
4542-452
28
97.4
Not MeasuredNot Measured18
Not MeasuredSVE-1 Unknown 4 Unknown 18 Not Measured
4 UnknownSVE-2 Unknown
Two 1,000-gallon gasoline USTs (abandoned in place), one 1,000-gallon
kerosene UST (removed), and two ASTs (unknown status).
Island still in place, dispensers have been removed
Unknown
NA
Inner Piedmont
Residual Impacts
Extent
Contaminants of Concern
Concentrations
Soil Type silty clay
Residual Impacts Yes
Extent Vicinity of USTs and potentially the former dispenser locations
Contaminants of Concern Gasoline compounds
Concentrations Unknown
Soil Type silty clay
Source to GW?Yes
NAPL Present? Residual or Mobile?Free product historically not detected in monitoring wells
Depth to Groundwater Approximately 26 to 27 feet bgs
Hydraulic Conductivity Unknown
Delineated? If so, extent?Generally delineated-does not extend into ROW or onto adjacent properties
Extend Off-Site?No
Contaminants of Concern Gasoline compounds
Concentrations Above 2L standards, benzene above GCL in well RW-1
Trends Slightly increasing
Horizontal Gradient
Vertical Gradient
Depth to Groundwater Approximately 26 to 27 feet bgs
Delineated? If so, extent?No
Extends Off-Site?No
Hydraulic Conductivity Unknown
Contaminants of Concern Gasoline compounds
Concentrations Below 2L standard
Trends Slightly increasing
Horizontal Gradient Unknown
Approximately 1,100 feet northeast (unnamed tributary of Buffalo Creek)
VOC compounds
Not sampled
NA
Lateral Distance from Source to Building Adjacent (west) to the building
Depth to GW Approximately 26 to 27 feet bgs
Precluding Factors Present? Specify.1,2-dichloroethane detections
GW Concentrations > VISLs?No
Exterior Soil Gas Concentrations >VISLs?
Sub-Slab Concentrations > VISLs?
Indoor Air Concentrations > VISLs?
Is the VI Pathway Complete?
Unknown
MMPE completed May 2016. Cocentrations generally decreased following the event but
concentrations have apparently rebounded.
Number within 250 feet 1 active - used for watering vegetation on adjacent town park to the north
Number within 500 feet None
Number within 1,000 feet 1 active - used to wash vehicles
Groundwater generally delineated, surface water not sampled
On-site structures
Cool Cycle, Inc.
Unknown
NAPL and/or >GCLs GCL exceedances (benzene) present in well RW-1 - Recommended MMPE Event
Water Supply Wells Potentially abandon adjacent well WSW-4
Down-gradient wells not impacted-tributary is not a concern
NA
Unknown
Not sampled
Unknown
ReceptorsSurface WaterGroundwaterBedrockSubsurfaceSurficialDistance from Source
Contaminants of Concern
Concentrations
Groundwater or Surficial Source?
Current/Proposed Property Use
Soil (Type, When, Successful?)
Groundwater (Type, When, Successful?)
Vapor IntrusionClosure PathwayTable 5: Conceptual Site Model
Source
Areas
UST(s)
Dispensers
Other
Piping
GWSoilPhysiographic Province
SurfaceWaterAssessmentRemediationSoil VaporSurficialSoilScreeningWSWsSurface Water (Modeling/Screening or Empirical)
Vapor Intrusion (Modeling/Screening or Empirical)
APPENDIX A
LABORATORY ANALYTICAL RESULTS AND
CHAIN-OF-CUSTODY FORMS
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Table of Contents
Sample Summary 3
Case Narrative 4
Sample Results 6
17H1036-01 6
17H1036-02 8
17H1036-03 10
17H1036-04 12
Sample Preparation Information 14
QC Data 15
Volatile Organic Compounds by GC/MS 15
B184516 15
B184612 19
Flag/Qualifier Summary 23
Certifications 24
Chain of Custody/Sample Receipt 26
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APPENDIX B
FIELD NOTES
APPENDIX C
PHOTOGRAPHS
Project No. 71179012
Date Photos Taken: August 15, 2017
Lewis Service Station (Incident No. 3701) – Monitoring Report
View of the site, looking north along NC Highway 18.
View of wells SVE-1 (red arrow), VMW-1 (green arrow), MW-1 (blue arrow), and RW-1
(yellow arrow), looking north.
Project No. 71179012
Date Photos Taken: August 15, 2017
Lewis Service Station (Incident No. 3701) – Monitoring Report
View of the former dispenser island and well SVE-1, looking northeast.
View of the fenced area at the rear of the former Lewis Service Station, looking
northwest.