HomeMy WebLinkAboutFA-285_7552_CA_MRP_20230815SUBSEQUENT MONITORING
REPORT
ABANDONED STATION HIGHWAY 87 (INCIDENT NO. 7552)
8072 HIGHWAY 87 WEST
DUBLIN, BLADEN COUNTY, NORTH CAROLINA
ESP Project No. 23-00200-029
Prepared For:
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Prepared By:
ESP Associates, Inc.
P. O. Box 7030
Charlotte, North Carolina 28241
August 15, 2023
ESP Associates, Inc.
P.O. Box 7030 • Charlotte, NC 28241
1.800.960.7317 • NC: 704.583.4949, fax 704.583.4950 • SC: 803.802.2440, fax 803.802.2515
www.espassociates.com
August 15, 2023
Mr. Hassan Osman
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Email: hassan.osman@deq.nc.gov
Reference: SUBSEQUENT MONITORING REPORT
Abandoned Station Highway 87 (Incident #7552)
8072 Highway 87 West
Dublin, Bladen County, North Carolina
ESP Project No. 23-00200-029
Dear Mr. Osman:
ESP Associates, Inc. (ESP) is pleased to present this Subsequent Monitoring Report documenting
activities performed at the subject site, Abandoned Station Highway 87, in accordance with North
Carolina Department of Environmental Quality (NCDEQ), Task Authorization No. 1, approved on
May 15, 2023. The subject site is located at 8072 Highway 87 West in Dublin, North Carolina.
We appreciate the opportunity to provide environmental services on this project. If you should
have any questions, please do not hesitate to contact us at (704) 583-4949.
Sincerely,
ESP Associates, Inc.
Matthew R. Craig Christopher J. Ward, PG, RSM
Project Manager Senior Geologist
Attachment – Subsequent Monitoring Report
TABLE OF CONTENTS
Section Page
SITE INFORMATION ..................................................................................................................... i
EXECUTIVE SUMMARY ............................................................................................................. iii
1.0 INTRODUCTION ............................................................................................................... 1
1.1 SITE SETTING ........................................................................................................... 1
1.2 SITE GEOLOGY AND HYDROGEOLOGY ................................................................. 1
1.3 SURFACE WATER ..................................................................................................... 2
1.4 WATER SUPPLY WELLS ........................................................................................... 2
2.0 SITE HISTORY .................................................................................................................. 3
3.0 FIELD ACTIVITIES ........................................................................................................... 6
3.1 WATER LEVEL GAUGING ........................................................................................ 6
3.2 GROUNDWATER SAMPLING ................................................................................... 6
3.3 FREE PRODUCT EVALUATION ................................................................................ 7
3.4 WATER SUPPLY WELL SAMPLING ......................................................................... 7
3.5 FIELD QUALITY CONTROL SAMPLING AND ANALYSIS ....................................... 7
4.0 ANALYTICAL RESULTS .................................................................................................. 8
5.0 CONCLUSIONS AND RECOMMENDATIONS ................................................................. 9
6.0 REFERENCES ................................................................................................................. 10
FIGURES
Figure 1 USGS Topographic Site Location Map
Figure 2 Site Map
Figure 3 Groundwater Elevation Map
Figure 4 Groundwater Results Map
Figure 5 Water Supply Well Map
TABLES
Table 1 Water Supply Well Information
Table 2 Monitoring Well Construction and Groundwater Elevation Data
Table 3 Summary of Groundwater Analytical Results
APPENDICES
Appendix A Tables of Previous Groundwater Elevations and Analytical Results
Appendix B Field Documentation and Photographs
Appendix C Laboratory Data Reports
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i
SITE INFORMATION
Date of Report: August 15, 2023
NCDEQ Incident No: 7552
NCDEQ UST No.: FA-285
Site Name: Abandoned Station Highway 87
Site Location: 8072 Highway 87 West
Dublin, Bladen County, North Carolina 28433
Latitude: N 34.666485
Longitude: W 78.729907
UST Owner/ Operator: Brisson Oil Company (dissolved)
Current Property
Owner: Terry Bryan
8072 NC Highway 87 West
Bladenboro, North Carolina 28320
Current Property
Occupant: Terry Bryan
8072 NC Highway 87 West
Bladenboro, North Carolina 28332
Consultant: ESP Associates, Inc.
P.O. Box 7030
Charlotte, North Carolina 28241
(704) 583-4949
Laboratory: Pace Analytical Services, LLC
NCDEQ No. 5342
9800 Kincey Avenue
Huntersville, North Carolina 28028
(704) 875-9092
Release Information: Release Discovery Date: Unknown; discovered in 1993
Estimate Quantity: Unknown
Cause of Release: Leaking UST System
Source of Release: two 3,000-gallon USTs; one 4,000-gallon UST,
two 550-gallon USTs
Currently Active Tanks: None
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I, Christopher J. Ward, a Professional Geologist for ESP Associates, Inc., do certify that the
information contained in this report is correct and accurate to the best of my knowledge.
ESP Associates, Inc. is licensed to practice both geology and engineering in North Carolina. ESP
Associates, Inc.’ certification numbers are: Geology: C-556 / Engineering: F-1407
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EXECUTIVE SUMMARY
This executive summary section provides an abbreviated reporting of our Site observations and
findings. Refer to the main text and appendices for a complete reporting of our observations and
findings.
ESP Associates, Inc. (ESP) has completed a Subsequent Monitoring Report documenting
assessment activity performed at the Abandoned Station Highway 87 site (Incident No. 7552). The
site is an approximately 0.74-acre developed residential property (Tax Parcel No. 038313132615)
located at 8072 Highway 87 West in Dublin, Bladen County, North Carolina. This report was
completed to summarize the findings of assessment activities performed on July 14, 2023, in
accordance with North Carolina Department of Environmental Quality (NCDEQ), Task
Authorization No. 1, approved on May 15, 2023.
The work was performed as part of the State Lead Contract #N70522-D between NCDEQ and ESP.
This 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, January 2021, under the supervision of Christopher J. Ward, North Carolina
registered professional geologist (North Carolina License No. 1600).
On July 14, 2023, ESP performed the following field activities:
• Gauged static water levels in site monitoring wells MW-6, MW-22, and MW-23;
• Collected groundwater samples from MW-6, MW-22, and MW-23;
• Collected a water sample from water supply well WSW-1; and
• Collected on field duplicate water sample from WSW-1.
Collected water samples were analyzed for volatile organic compounds (VOCs) for comparison to
both North Carolina Groundwater Quality Standards 15A NCAC 2L .0202 (2L standards) and Gross
Contaminant Levels (GCLs).
Based on results of the above field activities and previous reporting, ESP concludes the following:
• Static water level depths ranged from 6.60 ft to 7.15 ft bTOC;
• The general direction of shallow groundwater flow beneath the site is to the south;
• Free product was not encountered in any of the monitoring wells during this gauging event
and have historically not been observed in the site monitoring wells;
• Municipal water is reportedly available to the site and surrounding areas; however, the site’s
property owner has not agreed to have the site connected to municipal water;
• Thirteen water supply wells are located within 1,000-feet of the site, eight of which are
currently active; and
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• No analytes were detected above laboratory reporting limits in any of the sampled wells
except for chloromethane in the duplicate sample for WSW-1 at a concentration of 0.52 J
µg/L, which is significantly less than its 2L standard of 3,000 µg/L.
Groundwater concentrations have remained below 2L and GCL standards in site wells since the
April 12, 2018 sampling event; however, it should be noted that sampling of temporary monitoring
well TMW-1A reported several constituents above 2L standards during the last sampling event in
May 2018.
Based on the above results, ESP offers the following recommendations:
• Continue to sample monitoring wells MW-6, MW-22, and MW-23 and water supply well
WSW-1;
• Install and sample a permanent monitoring well near the previous location of temporary
monitoring well TMW-1A to evaluate previous detections of constituents above 2L
standards at that location;
• Continue to attempt to obtain permission to abandon water supply wells WSW-1 (active
potable) and WSW-4 (active potable), WSW-6 (active non-potable), and WSW-7 (active
non-potable); and
• If conditions warrant, consider closure of site with NRP (Notice of Residual Petroleum).
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1.0 INTRODUCTION
1.1 Site Setting
The Abandoned Station Highway 87 site is an approximate 0.74-acre developed site (Tax Parcel No.
038313132615) located at 8072 NC Highway 87 West in Dublin, Bladen County, North Carolina (see
Figures 1 and 2). The site includes an approximate 2,472-sqft occupied single-family residence built
in 2009 on a partially wooded lot. The site is bounded to the north by single-family residential trailers,
to the east by undeveloped woods, to the south by a single-family residence, and to the west by NC
Highway 87 West.
1.2 Site Geology and Hydrogeology
Consideration of surface and subsurface drainage and geology are of interest since they provide
an indication of the direction that contamination, if present on-site or off-site, could be transported.
The site is located within the Coastal Plain Physiographic Provence. The Coastal Plain Region
was formed by deposition of unconsolidated, flat layers of sediment sourced from erosion of
mountains to the west. Sediments were deposited into varying depositional environments in
accordance with sea level changes. Most parts of the Coastal Plain Region consist of well to
moderately well-drained loamy soils.
The site is underlain by the Cretaceous-aged Black Creek Formation. Materials in the Black Creek
Formation consist of gray-to-black lignitic clay containing thin beds and laminae of fine-grained
micaceous sand and thick lenses of cross-bedded sand locally with glauconitic, fossiliferous clayey
sand lenses locally. Soils in the site area consist of Norfolk loamy fine sand, 0 to 2 percent slopes
(NoA).
In the Coastal Plain, groundwater generally occurs in pore spaces within the underlying sediment.
Recharge to the water table is primarily by the infiltration of meteoric waters to surficial soils and
percolating downward under the influence of gravity to the water table. 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.
The direction and movement of groundwater is generally dependent on soil type, the presence of
relict structures, and the textures of surrounding earth materials. Fractures, faults, folds, and
foliation planes affect the migration of groundwater in rock. No major geologic features (faults,
etc.) are present at or near the site. Groundwater typically flows in directions parallel to the ground
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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.
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 July 14, 2023 water level measurements, shallow
groundwater at the site is expected to flow to the south.
1.3 Surface Water
A small pond is located approximately 300-ft southeast of the site while wetlands are reportedly
present approximately 1,400-ft south and 1,200-ft northwest of the site. The closest streams occur
approximately 2,000-ft to the east and southeast of the site. These unnamed intermittent streams
drain into Bakers Creek which drains into the Cape Fear River (see Figures 1 and 5).
1.4 Water Supply Wells
Based on previous receptor surveys conducted by others, thirteen water supply wells were
identified within 1,000-feet of the Site (See Table 1). The water supply wells consist of eight
active wells (WSW-1 through WSW-4, WSW-6, WSW-7, WSW-8, WSW-13), one abandoned
well (WSW-5), and four inactive wells (WSW-9 through WSW-12). WSW-1 is located onsite and
is reportedly utilized for potable water and general domestic use. Seven of the water supply wells
(WSW-1, WSW-2, WSW-3, WSW-4, WSW-5, WSW-6, and WSW-7) are located downgradient
of the source area based on current and historic shallow groundwater flow directions (see Figures
3 and 5). Municipal water is reportedly available to the site and surrounding properties; however,
the site is currently not connected to municipal water.
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2.0 SITE HISTORY
The following description of historical site activities was obtained from a report titled “Groundwater
Sampling Letter Report, Abandoned Station 87 West” dated July 23, 2021, by Terracon
Consultants Inc. (Terracon) and a report titled “Annual Monitoring Report, Abandoned Station 87”
dated January 21, 2022, by Terracon.
• Between 1993 and 1996, 21 groundwater monitoring wells were installed at the site.
Groundwater samples from two monitoring wells (MW-1 and MW-16) exhibited
benzene at concentrations greater than GCL. The site was selected to participate in the
United States Environmental Protection Agency’s ‘Innovative Technology’ program
and various methods of remediation were evaluated for the site. Groundwater beneath
the site was determined to flow toward the south-southeast. A dissolved-phase
petroleum plume was delineated extending approximately 350 feet southeast of the
source area (Geophex, Ltd, 1998). Approximately 450 to 550 cubic yards of petroleum-
impacted soil was estimated to remain beneath the ground surface in the source area.
The site was periodically monitored by various consultants through October 1998.
• In December 2007, a Limited Site Assessment (LSA) was performed at the site (GMA,
2008). The LSA documented that a residence was located on the site and that the fuel
dispensing facility no longer existed. One monitoring well (MW6) was located on the
site. The LSA noted that Highway 87 had been widened between 1999 and 2007 and
many of the former monitoring wells were destroyed. This highway widening project
also capped a portion of the source area with pavement. A temporary well (TMW-1)
was installed in the road right-of-way in the location of a former monitoring well (MW-
1) that historically exhibited concentrations of benzene above the GCL. A groundwater
sample from TMW-1 was reported to contain petroleum contaminants above the 2L
standards, but below the GCLs. Free product was not observed in TMW-1 or MW-6.
Results of soil samples collected from the former tank pits during the LSA indicated
that concentrations of petroleum constituents above the soil-to-water Maximum Soil
Contaminant Concentrations (MSCCs). Three active water supply wells within 1,000
feet of the source area were also sampled, and target contaminants were not detected
above the laboratory reporting limits in the water supply well samples.
• In October 2013, a receptor survey was performed at the site (Crawford Environmental
Services). Twelve water supply wells were identified within 1,000 feet of the site. Six
wells were identified as active potable supply wells, two as active non-potable use supply
wells, and four as inactive wells. The closest active water supply well (WSW-1) was
located on the site.
• In March 2015, Terracon performed an updated receptor survey and collected
groundwater samples from MW-6 and water supply wells WSW-1 and WSW-4. Target
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contaminants were detected above the laboratory reporting limits in the groundwater
samples collected from MW-6, WSW-1, and WSW-4. The receptor survey identified
twelve water supply wells of similar status and use that the 2013 receptor survey
identified. Additionally, Terracon also confirmed that municipal water is available to the
site and surrounding properties. Free product recovery was performed from MW-6 by
Cooper Environmental Inc. (CEI) from March to June of 1994. Following free product
recovery, CEI conducted a soil venting pilot study (feasibility study) and installed
additional monitoring well MW-5A. CEI performed multiple follow-up sampling events
on a semi-annual basis from 1995 through 1999. Responsibility for the site remediation
was given to The Structures Group (TSG).
• In May 2015, Terracon installed a temporary monitoring well (TMW-1R) in the
approximate location of former temporary monitoring well TMW-1. Numerous
petroleum constituents in groundwater samples from the well were detected at
concentrations above the 2L standards.
• In April 2018, Terracon installed another temporary monitoring well (TMW-1A) in the
approximate location of the former temporary monitoring well TMW-1R. Numerous
petroleum constituents were detected at concentrations above the 2L standards in the
sample collected from TMW 1A. From July 30, 2019 to the June 25, 2021, Terracon
has sampled WSW-1 and MW-6. VOCs have not been detected above the laboratory
reporting limits in the samples from MW-6 and WSW-1.
• In June 2021, prior to mobilizing to the site to conduct groundwater sampling activities,
Terracon had a conversation with the property owner, Mr. Terry Bryan, about
discontinuing sampling of the on-site monitoring well (MW-6) and water supply well
(WSW-1) due to VOCs historically not being detected. Mr. Bryan also indicated that he
did not want the property to be connected to the municipal water system that operates
lines along NC Highway 87. Terracon relayed this request to the NCDEQ State Lead
Incident Manager, Mr. Hassan Osman, and Mr. Osman discussed the request with Mr.
Bryan. Mr. Osman instructed Terracon to attempt to obtain construction information of
WSW-1 and make note of the topography at the site. On June 24, 2021, Terracon called
Mr. Bryan for construction information of WSW-1. Mr. Bryan reported that the well was
shallow and likely 80 feet in depth, but he was unsure of the exact construction details.
• On June 25, 2021, Terracon mobilized to the site to sample monitoring well MW-6 and
water supply well WSW-1. Additionally, Terracon attempted to obtain construction
information for MW-6 and WSW-1 but no information could be found. Based on
information obtained during the completion of the groundwater sampling activities,
VOCs were not detected above laboratory reporting limits in MW-6 and WSW-1.
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• On November 30 and December 10, 2021 Terracon mobilized to the site to install two
permanent Type II monitoring wells (MW-22 and MW-23), sample monitoring wells
MW-6, MW-22, and MW-23 and water supply well WSW-1. Analytical results
indicated that all analytes were below 2L standards in MW-22, MW-23, and WSW-1.
Historical groundwater elevations and analytical results are provided in Appendix A.
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3.0 FIELD ACTIVITIES
On July 14, 2023, ESP performed the following field activities:
• Gauged static water levels in site monitoring wells MW-6, MW-22, and MW-23;
• Collected groundwater samples from MW-6, MW-22, and MW-23;
• Collected a water sample from water supply well WSW-1; and
• Collected on field duplicate water sample from WSW-1.
Sample locations are depicted on Figure 2. Field logbook entries along with water level survey,
groundwater sampling, and field instrument calibration forms were completed in the field to
document site activities (see Appendix B). Photographs are also provided in Appendix B. Details
of field activities are provided below.
3.1 Water Level Gauging
On July 14, 2023, prior to purging or collecting groundwater samples, depth to groundwater from
the top of casing (TOC) within each monitoring well was measured and recorded using a
decontaminated electronic water level meter. The water level measurements were collected by
first removing covers and plunger caps from all site monitoring wells and allowing water within
the wells to stabilize. The electronic water level meter probe was then lowered into the well and
the depth to water measured relative to the well’s TOC.
As noted on Table 2, static water level depths from MW-6, MW-22, and MW-23 ranged from
6.60 ft to 7.15 ft below top of casing (ft bTOC). Figure 3 depicts the site’s potentiometric surface
based on July 14, 2023 water level gauging data. As depicted on Figure 3, groundwater flow
beneath the site is toward the south.
3.2 Monitoring Well Sampling
On July 14, 2023, groundwater samples were collected from monitoring wells MW-6, MW-22,
and MW-23.
Monitoring well samples were collected using dedicated and disposable polyvinyl chloride (PVC)
bailers (1.5” x 3’) attached to braided nylon rope. Prior to groundwater sample collection, each
well was purged using the bailer. During purging, water quality parameters including pH,
conductivity, temperature, and turbidity were measured using calibrated field water quality
instruments. Readings were taken at the start of purging and periodically until a minimum of three
well volumes were removed from the well and water quality parameters stabilized. Following
purging, a groundwater sample for laboratory analysis was collected from the well using the bailer.
The water quality parameters were recorded on groundwater sampling forms along with time,
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water level depth, and cumulative volume of water purged (see groundwater sampling forms in
Appendix B).
Groundwater samples were collected following Guidelines for Sampling by the Underground
Storage Tank Section, Division of Waste Management, North Carolina Department of
Environmental Quality (NCDEQ, 2022). Groundwater samples were placed in laboratory-
prepared vials preserved with hydrochloric acid (HCl), labeled, and stored on ice in a cooler for
subsequent delivery under standard chain-of-custody (COC) procedures to Pace Analytical (Pace),
a North Carolina-certified laboratory, located in Huntersville, North Carolina, for analysis. The
groundwater samples were analyzed for VOCs by EPA Method 6200B including MTBE, ethylene
dibromide (EDB), and isopropyl ether (IPE).
3.3 Free Product Evaluation
During the July 14, 2023, gauging event, free product was not encountered in any of the monitoring
wells.
3.4 Water Supply Well Sampling
On July 14, 2023, a groundwater sample was collected from on-site water supply well WSW-1.
WSW-1 was sampled from a spigot on the exterior of the well house. Prior to sampling, the well
was purged by allowing the open spigot to run for 15 minutes. During purging, water quality
parameters including pH, conductivity, temperature, and turbidity were measured using calibrated
field water quality instruments. Readings were taken at the start of purging and periodically until
fifteen minutes had elapsed, and water quality parameters stabilized. Following purging, a
groundwater sample for laboratory analysis was collected directly from the spigot.
3.5 Field Quality Control Sampling and Analysis
One field duplicate sample was prepared by collecting an additional water sample from water
supply well WSW-1. The sample was placed into laboratory-prepared vials preserved with HCl
immediately following collection. The field duplicate was analyzed for VOCs to affirm the
accuracy of analytical results.
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4.0 ANALYTICAL RESULTS
Results of the laboratory analysis of water samples MW-6, MW-22, MW-23, and WSW-1 are
tabulated in Table 3. As noted in Table 3, the analytical results are compared to both 2L standards
and GCLs. The Pace laboratory analytical report is provided in Appendix C.
No analytes were detected at concentrations exceeding their respective GCLs or 2L standards (see
Table 3 and Figure 4). A summary of the analytical results is as follows:
• No analytes were detected above laboratory reporting limits in any of the sampled wells
except for chloromethane in the duplicate sample for WSW-1 at a concentration of 0.52 J
µg/L, which is significantly less than its 2L standard of 3,000 µg/L.
Since the April 12, 2018 sampling event, no analytes have been detected in site monitoring wells
or water supply wells above GCLs or 2L standards; however, it should be noted that sampling of
temporary monitoring well TMW-1A reported several constituents above 2L standards during the
last sampling event in May 2018.
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5.0 CONCLUSIONS AND RECOMMENDATIONS
Based on results of the above field activities and previous reporting, ESP concludes the following:
• Static water level depths ranged from 6.60 ft to 7.15 ft bTOC;
• The general direction of shallow groundwater flow beneath the site is to the south;
• Free product was not encountered in any of the monitoring wells during this gauging event
and have historically not been observed in the site monitoring wells;
• Municipal water is reportedly available to the site and surrounding areas; however, the site’s
property owner has not agreed to have the site connected to municipal water;
• Thirteen water supply wells are located within 1,000-feet of the site, eight of which are
currently active; and
• No analytes were detected above laboratory reporting limits in any of the sampled wells
except for chloromethane in the duplicate sample for WSW-1 at a concentration of 0.52 J
µg/L, which is significantly less than its 2L standard of 3,000 µg/L.
Groundwater concentrations have remained below 2L and GCL standards in site wells since the
April 12, 2018 sampling event; however, it should be noted that sampling of temporary monitoring
well TMW-1A reported several constituents above 2L standards during the last sampling event in
May 2018.
Based on the above results, ESP offers the following recommendations:
• Continue to sample monitoring wells MW-6, MW-22, and MW-23 and water supply well
WSW-1;
• Install and sample a permanent monitoring well near the previous location of temporary
monitoring well TMW-1A to evaluate previous detections of constituents above 2L
standards at that location;
• Continue to attempt to obtain permission to abandon water supply wells WSW-1 (active
potable) and WSW-4 (active potable), WSW-6 (active non-potable), and WSW-7 (active
non-potable); and
• If conditions warrant, consider closure of site with NRP (Notice of Residual Petroleum).
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6.0 REFERENCES
Bladen County, North Carolina GIS website, https://gis.bladenco.org/
1985 Geologic Map of North Carolina, The North Carolina Geological Survey, Phillip M. Brown,
1985.
Guideline for Sampling Underground Storage Tank Section, Division of Waste Management,
North Carolina Division of Environmental Quality, March 7, 2022, Change 4.
Terracon, July 23, 2021, Groundwater Sampling Letter Report: Abandoned Station Highway 87;
8072 Highway 87 West; Dublin, Bladen County, North Carolina; UST Incident Number: 7552;
Terracon Project No. 70217274.
Terracon, January 21, 2022, Annual Monitoring Report: Abandoned Station Highway 87 (Incident
#7552); Dublin, Bladen County, North Carolina; Terracon Project No. 70217274.
FIGURES
ED
ED
WSW-1
WSW-9
NC-87 HWY WED
WSW-10
ED
WSW-13
ED
ED
WSW-12
WSW-11
ED
WSW-5
ED
ED
ED
ED
EDED
WSW-6
WSW-7
WSW-4
WSW-8
WSW-2
WSW-3
0 110 220Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone 704.583.4949
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-029
ET
CWDATE08/07/2023
FIGURE 5WATER SUPPLY WELL RADIUS MAP µAs Shown
DUBLIN, NORTH CAROLINA
SITE BOUNDARYWATER SUPPLY WELL (ACTIVE)WATER SUPPLY WELL (INACTIVE)WATER SUPPLY WELL (DESTROYED)FRESHWATER POND
All locations are approximate.
ABANDONED STATION HIGHWAY 87
LEGEND:
EDED
ED
<<
<
<
ED
ED
MW-6
MW-22 MW-23
WSW-1
WSW-9
TMW-1A
NC-87 HWY W0 30 60Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone 704.583.4949
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-029
ET
CWDATE08/07/2023
FIGURE 2SITE MAPµAs Shown
DUBLIN, NORTH CAROLINA
SITE BOUNDARYMONITORING WELLTEMPORARY MONITORING WELL (2018)WATER SUPPLY WELL (ACTIVE)WATER SUPPLY WELL (INACTIVE)
All locations are approximate.
ABANDONED STATION HIGHWAY 87
<
LEGEND:
ED
<
ED
<<
<
<
ED
ED
MW-6
MW-22 MW-23
WSW-1
WSW-9
TMW-1A
NC-87 HWY W0 30 60Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone 704.583.4949
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-029
ET
CWDATE08/07/2023
FIGURE 3GROUNDWATER ELEVATION MAPµAs Shown
DUBLIN, NORTH CAROLINA
SITE BOUNDARYMONITORING WELLTEMPORARY MONITORING WELL (2018)WATER SUPPLY WELLESTIMATED GROUNDWATER ELEVATION CONTOURESTIMATED GROUNDWATER FLOW DIRECTION
All locations are approximate.
ABANDONED STATION HIGHWAY 87 <
LEGEND:
ED
<
<<
<
<
ED
ED
MW-6
MW-22 MW-23
WSW-1
WSW-9
TMW-1A
NC-87 HWY W0 30 60Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone 704.583.4949
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-029
ET
CWDATE08/07/2023
FIGURE 4GROUNDWATER RESULTS MAPJULY 14, 2023µAs Shown
DUBLIN, NORTH CAROLINA
SITE BOUNDARYMONITORING WELLTEMPORARY MONITORING WELL (2018)WATER SUPPLY WELLWATER SUPPLY WELL (INACTIVE)
All locations are approximate.
ABANDONED STATION HIGHWAY 87 <
LEGEND:
ED
<
ED
ED
ED
WSW-1
WSW-9
NC-87 HWY WED
WSW-10
ED
WSW-13
ED
ED
WSW-12
WSW-11
ED
WSW-5
ED
ED
ED
ED
EDED
WSW-6
WSW-7
WSW-4
WSW-8
WSW-2
WSW-3
0 110 220Feet
ESP Associates, Inc.
P.O. Box 7030Charlotte, NC 28241
Phone 704.583.4949
www.espassociates.com
SHEET TITLE
PROJECT
PROJECT NO.
SCALE
DRAWN BY
CHECKED BY
23-00200-029
ET
CWDATE08/07/2023
FIGURE 5WATER SUPPLY WELL RADIUS MAP µAs Shown
DUBLIN, NORTH CAROLINA
SITE BOUNDARYWATER SUPPLY WELL (ACTIVE)WATER SUPPLY WELL (INACTIVE)WATER SUPPLY WELL (DESTROYED)FRESHWATER POND
All locations are approximate.
ABANDONED STATION HIGHWAY 87
LEGEND:
EDED
ED
TABLES
Table 1
Water Supply Well Information
Abandoned Station Highway 87
Dublin, North Carolina
NCDEQ Incident No. 7552
Well No.Property Owner Mailing Address Property Address
Distance from Source
Area
(ft)
Hydraulic
Relationship to
Source Area
Well
Status/Use
Municpal
Water
Available
Parcel No.
WSW-1 Terry Bryan 8072 NC Hwy 87 West
Bladenboro, NC 28320
8072 NC Hwy 87 West
Bladenboro, NC 28320 ~150 feet / northeast downgradient Active / Potable Yes 38313132615
WSW-2 James and Brenda Bryan PO Box 485
Dublin, NC 28332
7930 NC Hwy 87 West
Bladenboro, NC 28320 ~670 feet / southeast downgradient Active / Potable Yes 38313232009
WSW-3 James and Brenda Bryan PO Box 485
Dublin, NC 28332
7930 NC Hwy 87 West
Bladenboro, NC 28320 ~790 feet / southeast downgradient Active / Potable Yes 38313232009
WSW-4 Oscar E. Bryan 8082 NC Hwy 87 West
Bladenboro, NC 28320
8082 NC Hwy 87 West
Bladenboro, NC 28320 ~500 feet / southeast downgradient Active / Potable Yes 38313135208
WSW-5 Donna A. Jackson and
Theron Hursey
PO Box 52
Dublin, NC 28332
8043 NC Hwy 87 West
Bladenboro, NC 28320 ~550 feet / southeast downgradient Abandoned Yes 38313133082
WSW-6 Oscar E. Bryan and Patricia
Bryan
PO Box 243
Dublin, NC 28332
8052 NC Hwy 87 West
Bladenboro, NC 28320 ~225 feet / southeast downgradient Active / Non-
potable Yes 38313133591
WSW-7 Oscar E. Bryan and Patricia
Bryan
PO Box 243
Dublin, NC 28332
8052 NC Hwy 87 West
Bladenboro, NC 28320 ~500 feet / southeast downgradient Active / Non-
potable Yes 38313133591
WSW-8 Oscar E. Bryan and Patricia
Bryan
PO Box 243
Dublin, NC 28332
8052 NC Hwy 87 West
Bladenboro, NC 28320 ~830 feet / east crossgradient Active / Potable Yes 38313133591
WSW-9 Britt Investment Properties
LLC
PO Box 272
Dublin, NC 28332
8138 NC Hwy 87 West
Bladenboro, NC 28320 ~250 feet / northwest upgradient Inactive Yes 38313130822
WSW-10 Steven Thomas Russ PO Box 30
Dublin, NC 28332
8160 NC Hwy 87 West
Bladenboro, NC 28320 ~360 feet / northwest upgradient Inactive Yes 38313039950
WSW-11 Judith A. Hehl PO Box 382
Dublin, NC 28332
8240 NC Hwy 87 West
Bladenboro, NC 28320 ~825 feet / northwest upgradient Inactive Yes 38313046231
WSW-12 William G. McDaniel 8638 NC Hwy 87 West
Tarheel, NC 28392
McDaniel Lane
Dublin, NC 28320 ~900 feet / northwest upgradient Inactive Yes 38313143532
WSW-13 William G. McDaniel 8638 NC Hwy 87 West
Tarheel, NC 28392
McDaniel Lane
Dublin, NC 28320 ~900 feet / north upgradient Active / Potable Yes 38313143532
Water supply well information obtained from Report of Groundwater Sampling and Receptor Survey prepared by Terracon Consultants dated April 17, 2015.
1 of 1
Table 2
Monitoring Well Construction and Groundwater Elevation Data
Abandoned Station Highway 87
Dublin, North Carolina
NCDEQ Incident No. 7552
Well
ID
Date
Intalled
Screened Interval
(ft BGS) a
Bottom of
Well
(ft BGS) a
Top of Casing
Elevation
(ft) a,b
Date Water
Level Measured
Depth to Water
from Top of
Casing
(ft bTOC)
Groundwater
Elevation
(ft)
7/30/2019 6.67 133.28
2/7/2020 0.45 139.50
6/25/2021 6.49 133.46
12/10/2021
7/14/2023 6.60 133.35
12/10/2021 9.45 129.78
7/14/2023 6.66 132.57
12/10/2021 9.70 129.60
7/14/2023 7.15 132.15
Notes:
a Top of casing elevations, screened intervals, and bottom of well measurements are from previous consultants' monitoring reports.
b Top of casing elevations measured in feet above mean sea level using a Trimble VRS unit on 12/10/2021
BGS - below ground surface
ft - feet
ft bTOC - feet below TOC
TOC - top of casing
MW-6
MW-22
MW-23
Unknown
5.0 - 15.0
5.0 - 15.0 139.30
Well is Dry
Unknown
11/30/2021
11/30/2021
7.20
15.0
15.0
139.95
139.23
Table 3
Summary of Groundwater Analytical Results
Abandoned Station Highway 87
Dublin, North Carolina
NCDEQ Incident No. 7552
(Page 1 of 1)
6,000 1 3 600 70 6 70 600 400 400 500 500 500
6,000,000 5,000 3,000 80,000 30,500 6,000 26,100 260,000 28,500 24,100 50,000 50,000 50,000
05/27/15 NR 31.2 ND 934 59.6 333 160 1,350 1,180 332 4,230 NR NR
04/12/18 NR 17.5 ND 822 60.1 197 203 1,670 1,280 379 3,980 NR NR
03/03/15 NR <0.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <1.50 NR NR
04/12/18 NR <0.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <1.50 NR NR
02/07/20 ND <0.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <1.50 NR NR
06/25/21 ND <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NR NR
07/14/23 NR <0.079 <0.18 <0.081 <0.11 0.74J <0.10 <0.090 <0.031 <0.071 <0.14 <0.094 <0.14
12/10/21 4.4 J <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NR NR
07/14/23 NR <0.079 <0.18 <0.081 <0.11 <0.10 <0.10 <0.090 <0.031 <0.071 NR <0.094 <0.14
12/10/21 17 <0.50 <0.50 2.5 0.64 3.6 1.7 4.1 7.1 20 20.1 NR NR
07/14/23 NR <0.079 <0.18 <0.081 <0.11 <0.10 <0.10 <0.090 <0.031 <0.071 <0.14 <0.094 <0.14
03/03/15 NR <0.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <1.50 NR NR
04/12/18 NR <0.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <1.50 NR NR
07/30/19 ND <0.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <1.50 NR NR
02/07/20 ND <0.50 <0.50 <0.50 <0.50 <2.0 <0.50 <0.50 <0.50 <0.50 <1.50 NR NR
06/25/21 ND <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NR NR
12/10/21 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NR NR
07/14/23 NR <0.079 <0.18 <0.081 <0.11 <0.10 <0.10 <0.090 <0.031 <0.071 <0.14 <0.094 <0.14
Duplicate
(WSW-1)07/14/23 NR <0.079 0.52J <0.081 <0.11 <0.10 <0.10 <0.090 <0.031 <0.071 <0.14 <0.094 <0.14
Notes:
Bold values indicate constituent concentrations were greater than the 2L Standard.
Yellow highlighted values indicate constituent concentrations were greater than the GCL.
Samples presented prior to the July 14, 2023 event were obtained from reports of previous consultants.
<## - less than the method detection limit
µg/L - micrograms per liter
2L Standard - North Carolina 02L standard for groundwater
GCL - Gross Contaminant Level
J - Estimated concentration above the method detection limit and below the reporting limit.
NR - not reported
ND - reportedly not detected 1,3,5-TrimethylbenzeneWSW-1 m&p-Xyleneo-XyleneGCL (µg/L)
Sample ID Collection
Date
Xylene (Total)2L Standard (µg/L)EthylbenzeneIsopropylbenzene (cumene)Naphthalenen-PropylbenzeneChloromethaneAcetoneToluene1,2,4-TrimethylbenzeneMW-6
MW-22
MW-23 BenzeneTMW-1R/1A
APPENDICES
APPENDIX A
APPENDIX B
SITE PHOTOGRAPHS
APPENDIX C
ESP Corporate Office
3475 Lakemont Boulevard
Fort Mill, SC 29708
803.802.2440
Mailing Address: P.O. Box 7030 Charlotte, NC 28241
800.960.7317 | www.espassociates.com
Concord
7144 Weddington Rd. NW
Suite 110
Concord, NC 28027
704.793.9855
Cornelius
20484 Chartwell Center Dr.
Suite D
Cornelius, NC 28031
704.649.2863
Raleigh
2200 Gateway Centre Blvd.
Suite 216
Morrisville, NC 27560
919.678.1070
Greensboro
7011 Albert Pick Rd
Suite E
Greensboro, NC 27409
336.334.7724
Wilmington
211 Racine Drive
Suite 101
Wilmington, NC 28403
910.313.6648
Charleston
2154 North Center Street
Suite E-503
North Charleston, SC 29406
843.714.2040
Nashville
500 Wilson Pike Circle
Suite 310
Brentwood, TN 37027
615.760.8300
Pittsburgh
One Williamsburg Place
Suite G-5, Box 13
Warrendale, PA 15086
724.462.6606
Bradenton
518 13th Street
West Bradenton, FL 34205
941.345.5451
Indianapolis
8673 Bash Street
Indianapolis, IN 46256
317.537.6979
Albuquerque
1203 West Ella Drive
Corrales, NM 87048
505.314.1322
Birmingham
291 Cahaba Valley Parkway North Suite A
Pelham, AL 35124
205.664.8498
Vickrey & Associates, LLC - An ESP Company
San Antonio
12970 Country Parkway
San Antonio TX 78216
210.349.3271
Austin
3600 West Parmer Lane
Suite 175
Austin, TX 78727
512.494.8014
McAllen
1216 East Jasmine Avenue
Suite C
McAllen, TX 78501
956.340.0045