HomeMy WebLinkAboutFA-3898_29796_CA_CAP_20231030_CAPR
100 East Ruffin Street, Mebane, North Carolina 27302
Telephone (919) 563-9091 ·Facsimile (919) 563-9095
www.terraquestpc.com
CORRECTIVE ACTION PERFORMANCE REPORT
(August, September, October 2023)
POCO SHOP #1
97 N. FAYETTEVILLE STREET
PARKTON, ROBESON COUNTY, NORTH CAROLINA 28371
Latitude: 34.902626o N Longitude: 79.01051o W
Release Information:
Date Discovered: 11/20/2012 (Lab Confirmed)
Estimated Release Quantity: Unknown
Release Cause/Source: Commercial Underground Storage Tanks
UST Capacities: (3) 6,000-gallon gasoline USTs
NCDWM-UST Incident No. 29796
NCDWM-UST Risk Ranking: HIGH (H-225-A)
Facility ID No.: 0-021993
Responsible Party: Property Owner:
Parnell Oil Company, Inc. Alhobishi Convenience Stores & Rentals
c/o Dave Parnell c/o Fadhl Alhobishi (910) 583-7565
(919) 412-9252 alhobishifadhl@yahoo.com
2307 Byrd Street Abdu Alhobishi (910) 258-3823
Raleigh, NC 27608-1411 97 N. Fayetteville St
Parkton, NC 28371
Terraquest Project No. 07512
October 30, 2023
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 i 97 Fayetteville St, Parkton, Robeson County, NC
TABLE OF CONTENTS
ENVIRONMENTAL ACRONYMS ...................................................................................................................... ii
EXECUTIVE SUMMARY ................................................................................................................................. iii
1.0 INTRODUCTION ................................................................................................................................ 1
2.0 SITE HISTORY AND CHARACTERIZATION .......................................................................................... 1
3.0 FREE PRODUCT ............................................................................................................................... 10
4.0 SOIL REMEDIATION ........................................................................................................................ 10
5.0 GROUNDWATER ASSESSMENT AND REMEDIATION ...................................................................... 15
6.0 CONCLUSIONS ................................................................................................................................ 16
7.0 LIMITATIONS .................................................................................................................................. 16
REFERENCE .................................................................................................................................................. 17
CERTIFICATION ............................................................................................................................................ 18
TABLES:
1. Site History (UST System Information)
2. Surrounding Property Owners
3. Water Supply Well Information
4. Summary of Soil Sampling Results
5. Monitoring Well Construction Information
6. Summary of Air Sampling Results
7. Contaminant Mass Removal Calculations
8. Summary of Groundwater Sampling Results
FIGURES:
1. Site Location Map
2. Site Vicinity Map
3. Site Layout Map
4. Remediation System Layout
5. Potentiometric Surface Map (6/28/23)
6. Soil Sample Location Map (CSA)
7. Groundwater Sampling Results (6/28/23)
APPENDICES:
A. Technical Methods / Standard Procedures
B. Chronological Site History
C. Historical Groundwater Data
D. Analytical Reports
E. Treatment System Inspection Sheets
ENVIRONMENTAL ACRONYMS
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 ii 97 Fayetteville St, Parkton, Robeson County, NC
2L Standard Groundwater Standards Title 15A NCAC 2L
0.0202(g)
2B Standard Surface Water Standards Title 15A NCAC 2B
AFVR Aggressive Fluid-Vapor Recovery
AST Aboveground Storage Tank
BGL Below Ground Level
BTEX Benzene, toluene, ethylbenzene, xylenes
C&D Construction and Demolition
CAP Corrective Action Plan
CAPR Corrective Action Performance Report
CADR Corrective Action Design Report
CSA Comprehensive Site Assessment
DPE Dual-phase Extraction
EPA Environmental Protection Agency
ePATA Electronic Pre-Approval Task Authorization
EPH Extractable Petroleum Hydrocarbons
ESA Environmental Site Assessment
GCL Gross Contamination Level
LEL Lower Explosive Limit
LSA Limited Site Assessment
IPE di-Isopropyl Ether
ISCO In-situ Chemical Oxidation
MADEP Massachusetts Department of Environmental
Protection
MDL Method Detection Limit
MNA Monitored Natural Attenuation
MMPE Mobile Multi Phase Extraction
MSCC Maximum Soil Contaminant
Concentration
MSL Mean Sea Level
MSW Municipal Solid Waste
MTBE Methyl tertiary-Butyl Ether
NC North Carolina
NCAC NC Administrative Code
NCDENR NC Department of Environment and Natural
Resources
NCDEQ NC Department of Environmental
Quality
NCDOT NC Department of Transportation
NCDWM-SW NC Division of Waste Management’s Solid
Waste Section
NCDWM-UST NC Division of Waste Management’s UST
Section
NCDWQ NC Division of Water Quality
NFA No Further Action
NORR Notice of Regulatory Requirements
NORP Notice of Residual Petroleum
NOV Notice of Violation
NPDES National Pollutant Discharge
Elimination System
OVM Organic Vapor Meter
PID Photoionization Detector
PLC Programmable Logic Controller
POE Point of Entry (water treatment system)
POTW Publicly Owned Treatment Works
RBCA Risk Based Corrective Action
RDL Reporting Detection Limit
RP Responsible Party
SCFM Standard Cubic Feet per Minute
SVE Soil Vapor Extraction
STF Leaking UST State Trust Fund
STG Soil to Groundwater
TA Task Authorization
TCC Target Cleanup Concentrations
Terraquest Terraquest Environmental Consultants,
P.C.
TPH Total Petroleum Hydrocarbon
UVF Ultraviolet Fluorescence
UST Underground Storage Tank
VOA Volatile Organic Analysis
VOC Volatile Organic Compound
VPH Volatile Petroleum Hydrocarbons
XP Explosion Proof
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 iii 97 Fayetteville St, Parkton, Robeson County, NC
EXECUTIVE SUMMARY
On behalf of Parnell Oil Company, Inc, Terraquest Environmental Consultants, P.C. has prepared
this Corrective Acton Performance Report for the petroleum UST release incident at the POCO
Shop #1 facility located in Parkton, Robeson County, NC.
Soil and groundwater remediation continues at the site with the operation of an SVE and air
sparge treatment system.
As contaminant concentrations in monitoring well MW10 are not decreasing at the same rate as
other wells at the site, Terraquest has applied peroxide to that well. Groundwater sampling
results from the June 2023 sampling event indicated that TCC violations remain in monitoring
well MW10 preventing closure. As recommended by the NCDWM-UST, Terraquest has added a
sparge well in the vicinity of monitoring well MW10. A report on those actions is forthcoming.
Terraquest recommends the continued operation of the system and groundwater monitoring in
line with the ROD.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 1 97 Fayetteville St, Parkton, Robeson County, NC
1.0 INTRODUCTION
On behalf of the responsible party, Parnell Oil Company, Inc, Terraquest Environmental
Consultants, P.C. has prepared this Corrective Action Performance Report for the POCO Shop #1
facility located in Parkton, Robeson County, NC. The site has been ranked a High Risk H225A by
the NCDWM-UST based upon the presence of an active municipal water supply well within 1,000-
feet of the source area. Corrective actions at this site include the operation of an onsite soil and
groundwater treatment system. This report documents the remediation system operation,
maintenance, and performance for the August, September, and October 2023 operating period.
Activities detailed in this report were pre-approved by the NCDWM-UST on ePATA 29796-040.
The site’s location, vicinity, and layout are depicted on Figures 1, 2, and 3. The treatment system
layout is shown on Figure 4. Terraquest’s technical methods and standard procedures are
detailed in Appendix A.
2.0 SITE HISTORY AND CHARACTERIZATION
A detailed chronological site history is provided in Appendix B.
1. UST Owner and Tank Information
Parnell Oil Company, Inc. purchased the property at 97 N. Fayetteville Street on December 27,
1962. Three 6,000-gallon gasoline USTs were installed on September 26, 1988. A 1,000-gallon
kerosene AST is also located at the site. The AST’s installation date is unknown. As of October
22, 2013, this site was sold to RSAP of Raeford, LLC and then to Alhobishi Convenience Stores &
Rentals in January 2019. A site history of the USTs and AST located on the site is included as Table
1. Current tank locations are shown on Figure 3.
2. Non-UST Information
No non-UST release incident is documented at this site.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 2 97 Fayetteville St, Parkton, Robeson County, NC
3. Release Description
The release was discovered in November 2012, when Geological Resources, Inc. (GRI) completed
a Phase II Environmental Site Assessment.
On November 1, 2012, GRI completed field activities as part of a Phase II ESA. Field activities
included the advancement of three soil borings and the collection of soil and groundwater
samples. Two soil borings were advanced adjacent to the current UST system and a third near
the southeastern edge of the current canopy. Analytical results from the collected soil samples
revealed TPH concentrations exceeding the then 10 mg/kg action limit in all samples.
Each soil boring was advanced into the water table for the collection of a groundwater sample
by a discrete sampler. The three groundwater samples (SB-1-GW, SB-2-GW, and SB-3-GW) were
submitted for analysis per EPA Method 8260B. Groundwater analytical results revealed 2L
Standard violations in all three samples.
An UST-61 24-Hour Release and UST Leak Reporting Form was submitted to the NCDWM-UST
Fayetteville Regional Office on November 20, 2012, by GRI.
No discrete release event has been documented for the USTs at the site. The estimated quantity
of petroleum released to the subsurface from the USTs is unknown.
4. Site Characteristics
Land use in the vicinity of the site is a mixture of residential, business, and agricultural. The site
and surrounding properties are zoned business (PKTB) as shown on Figure 2. The closest
residence is located less than 250 feet to the southeast of the site. The closest place of public
assembly, excluding restaurants, is the Parkton Baptist Church located approximately 300 feet to
the south of the site. The closest school is the Parkton Elementary School located approximately
1,240 feet to the northeast of the site. An aerial view is provided on the following page.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 3 97 Fayetteville St, Parkton, Robeson County, NC
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5. Regional and Site Geology and Hydrogeology
According to the Geologic Map of North Carolina, the site lies in the Coastal Plain Physiographic
province (Brown, et al., 1985). Specifically, the site lies in the Black Creek Formation and is
underlain by glauconitic, fossiliferous clayey sand. On a regional scale, the Coastal Plain is
characterized by land with little relief. Groundwater in the region is directed southwest towards
Dunn’s Marsh and eventually to the Cape Fear River.
SITE
MUNICIPAL
WELL
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 4 97 Fayetteville St, Parkton, Robeson County, NC
The following lithologies were encountered at the site during the installation of soil borings and
the monitoring well network:
0' – 16' below ground level (BGL):
SANDY FAT CLAY (CH)
Mostly medium stiff tan fat clay, with some poorly graded sand.
16’ – 35’ BGL:
CLAYEY SAND (SC) to WELL GRADED SAND (SW)
Mostly medium dense to dense well graded sand, with tannish/gray clay. The quantity of clay
decreases with depth.
Generalized subsurface lithologies are shown in the following geologic cross-sections:
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 5 97 Fayetteville St, Parkton, Robeson County, NC
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 6 97 Fayetteville St, Parkton, Robeson County, NC
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 7 97 Fayetteville St, Parkton, Robeson County, NC
The local topography is characterized as minor sloping with little relief. The entire area
surrounding 1,000 feet of the site is mapped at approximately 185 feet above sea level. Local
topography is depicted in Figure 1.
The release area is overlain by an asphalt and concrete parking lot. Precipitation with falls on the
uncovered portions of the site infiltrates the underlying soils. Excessive runoff and shallow soil
drainage is directed toward storm water drains located around the property.
Terraquest has searched for any surface water bodies within a 500-foot radius of the site. No
surface water bodies were identified within this search area. The nearest surface water body is
an unnamed tributary of Dunn’s Marsh located approximately 2,050 feet to the southwest.
Figure 2 illustrates the areas surface water bodies.
Analysis of the cross sections in a general way reveals that the shallowest lithology is fat clay with
sand that extends to a depth of approximately seven feet to seventeen feet where the sandy clay
becomes predominantly sand with little clay. Bedrock was not encountered during the
installation of monitoring wells. The phreatic aquifer at the site begins approximately 8.5 feet
BGL; however, historical data has shown it as shallow as 1.75 feet BGL. Historical groundwater
elevation data is provided in Appendix C. Historical groundwater flow at the site decreases to
the south, southwest. The most recent groundwater flow map is provided as Figure 5.
As part of the CSA, the groundwater elevation measurements reveal that the hydraulic head
within the shallow phreatic aquifer ranged from a relative value of approximately 87.26 feet at
monitoring well MW2 to 87.03 feet at monitoring well MW10 as measured on November 13,
2013. In conjunction with other site measurements, the results indicate flow in the phreatic
aquifer in a southwesterly direction under an average hydraulic gradient of 0.003.
Water level data from the Type III monitoring well (MW12) and the interpreted groundwater
elevation in the phreatic aquifer in the vicinity of the Type III wells were used to determine if a
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 8 97 Fayetteville St, Parkton, Robeson County, NC
vertical head gradient existed in the phreatic aquifer. The vertical gradient was calculated using
the following equation and groundwater elevation data collected on November 13, 2013:
Type III monitoring well MW12
where:
Vg = Vertical head gradient
Hphreatic = Water elevation in the shallow aquifer near MW12 = 87.84’
HMW12 = Water elevation in deep well MW12 = 86.80’
D = The difference in elevation between the shallow water table and the
middle of the well screen in MW12 = (87.84’ – 67.04’) = 20.80’
therefore:
The head gradient suggests a recharging hydrologic flow gradient meaning groundwater tends to
flow in a downward direction. A review of regional topographic maps affirms this belief. With
increasing depth and distance from the recharge area, the flow lines flatten out and become
more horizontal than vertical. Eventually, as the flow lines near lower elevations, the flow lines
curve upward towards the ground surface into areas of discharge such as streams and rivers.
6. Surrounding Property Owners and Occupants
Surrounding property owner information is provided in Table 2.
7. Critical Receptors
On January 10, 2013, to determine the risk classification of the site, Terraquest personnel
performed a reconnaissance of properties within a 1,500-foot radius of the source area. The
D=V 12g
hhMWphreatic−
05.0 =20.80'
80'87.84'-86.=Vg +
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 9 97 Fayetteville St, Parkton, Robeson County, NC
reconnaissance effort consisted of obtaining tax department and local zoning information on
properties and conducting door-to-door visits of certain properties within 1,500 feet of the
source area, in addition to collecting other pertinent information from the appropriate local and
state officials. Terraquest personnel inspected all properties within 1,500 feet of the site and
attempted to contact all the property owners within 1,000 feet in person. Property owners were
questioned, if available, as to the source of their water and if any water supply wells were located
on their property. If owners/occupants were not home, a survey form was left at their residence
or forwarded to the property owners through the mail. In all cases, Terraquest also conducted a
visual survey of the property. A less detailed reconnaissance effort was conducted for properties
located 1,000 to 1,500 feet away from the site.
Eight water supply wells are located within 1,500 feet of the site. Of those eight, one sole-source
water supply well is located within 1,000 feet of the site. This sole-source well is a municipal well
owned and operated by the Town of Parkton. A second municipal water supply well is located
approximately 1,410 feet from the site and is only used for emergency purposes. The remaining
water supply wells are used for irrigational purposes and none are located within 250 feet of the
site. The site and surrounding properties obtain water from the Town of Parkton’s municipal
water supply well network. The site is located within a wellhead protection area. Water supply
well information is presented in Table 3.
8. Summary of CAP Implementation
Following pre-approval, pilot testing, CAP Feasibility Report, Corrective Action Design Report, and
the Record of Decision, construction for the remediation system began in June 2021. The system
was started on August 3, 2021. System performance is detailed in Corrective Action Performance
Reports.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 10 97 Fayetteville St, Parkton, Robeson County, NC
10. Reporting
To date, a Site Check Report, LSA (II), CSA, CAP, Monitoring, and Corrective Action Performance
Reports have been submitted for this release incident.
11. Progress of Remediation at the Site
Following a lengthy approval process, active remediation was initiated on August 3, 2021 with
the activation of a soil vapor extraction (SVE) and air sparge remediation system. The system has
been operational since that date.
3.0 FREE PRODUCT
No free product was encountered at the site during the recent operating period. Free product
has not been detected historically in any of the monitoring wells.
4.0 SOIL REMEDIATION
Historical Assessment:
On November 1, 2012, Geologic Resources, Inc. completed field activities as part of a Phase II
Environmental Site Assessment (ESA). Field activities included the advancement of three soil
borings and the collection of soil and groundwater samples. Two soil borings (SB-1 and SB-2)
were advanced adjacent to the current UST system. Soil boring SB-3 was advanced near the
southeastern edge of the current canopy. One soil sample was collected for analysis from each
soil boring: SB-1-8’, SB-2-4’, and SB-3-8’. Analytical results from the collected soil samples
revealed Total Petroleum Hydrocarbons as Gasoline Range Organics (TPH-GRO) concentrations
exceeding the 10 mg/kg action limit in all samples. TPH-Diesel Range Organics (DRO)
concentrations exceeding the 10 mg/kg state action limit were reported in the samples collected
from SB-2 and SB-3.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 11 97 Fayetteville St, Parkton, Robeson County, NC
On January 7, 2013, Terraquest personnel conducted a site check to document soil and water
quality at the site. Sixteen soil borings (B1 – B16) were advanced around the current UST system,
former product line and former dispensers. Analytical results of the collected soil samples
revealed Soil-to-Groundwater Maximum Soil Contaminant Concentrations (STG MSCC) violations
at each location. Soil borings B12 and B13 contained Residential – MSCC violations for C5 – C8
aliphatics (1,490 mg/kg and 1,080 mg/kg, respectively) and C9 – C10 aromatics (790 mg/kg and
800 mg/kg, respectively).
As part of the CSA, Terraquest personnel supervised the installation of fourteen (14) soil borings
(B17 – B30) on November 11, 2013. Soil samples (B17 – B30) were analyzed by EPA Method 8260
along with MADEP VPH. Soil analytical results are summarized in Table 4. The analytical results
for the soil sampled collected on November 11, 2013, revealed the following:
> Residential MSCCs: None
> STG MSCCs: B18, B19, B21 – B23, and B25 – B30
< STG MSCCs: B17, B20, and B24
As shown on Figure 6, the STG MSCC violation plume extends from the current UST basin towards
the south and east. Using the average depth-to-water of 6.5 feet BGL (from March 2013) and a
contaminated soil thickness of 6.5 feet, Terraquest estimated the appropriate volume of
impacted soil to be 2,190 – 2,410 tons. When using the average depth-to-water measurement
of 11.5 feet BGL from November 2013, Terraquest estimates an additional 1,690 – 1,860 tons of
contaminated soil is located within the capillary fringe.
Excavation:
Excavation was not conducted during this operating period. Excavation has not been conducted
as part of the CAP.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 12 97 Fayetteville St, Parkton, Robeson County, NC
Installation, activation, operation and maintenance, monitoring, and shutdown of a remedial
system (if applicable):
In March 2021, Terraquest personnel supervised the installation of remedial wells at the site.
Those wells include SVE wells SVE2-SVE10 and air sparge wells AS1-AS6. Note that SVE well SVE1
was installed as part of pilot testing and was incorporated into the system as an SVE well. Also,
monitoring well MW12, a Type III well, was previously installed and was incorporated into the
system as an air sparge point in the deeper aquifer. Monitoring well MWC, a pilot test well, was
incorporated as a shallow air sparge well. Air sparge wells were installed as a nested pair of
deeper and shallow sparge points with AS1 and AS2 together, MW12 and MWC together, AS3
and AS4 together, and AS5 and AS6 together. Well construction is outlined on Table 5. The well
locations are shown on Figure 3 and 4.
Installation of the SVE and air sparge system began in June 2021 and was conducted by Dynamic
Engineering Solutions, PC. of Charlotte, NC. The system equipment was provided by Zava
Industrial, Inc. of Graham, NC. System installation and equipment pictures are as follows:
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 13 97 Fayetteville St, Parkton, Robeson County, NC
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 14 97 Fayetteville St, Parkton, Robeson County, NC
Volume and extent of soil contamination:
The volume and extent of soil contamination was previously discussed. The approved Record of
Decision (ROD) calculated a soil contaminant mass of 1,606 kg.
Soil treatment system radius of influence:
Radius of influence or capture zone of the system was estimated at fifteen feet in the CAP based
on pilot testing. There are no active gauges or other measures present to tell if the ROI has
deviated from that estimate during the recent period.
Contaminant mass removal:
A partial look at soil quality was assessed during the recent period by sampling the active SVE
system’s exhaust stack in August, September, and October 2023. The analytical results are
summarized on Table 6. The results of the SVE efforts, as calculated in Table 7, show the recovery
of approximately 6.73 kg of contamination. Overall, the system has recovered over 685 kg. The
analytical reports are provided in Appendix D.
The system ran well throughout the latest quarter as detailed in Appendix E that also lists flow
rates and pressures for the soil remediation system. System operation and maintenance was
conducted once per month. Maintenance activities followed the manufacturer’s
recommendations as possible with cost reductions from the NC Leaking UST Trust Fund. A
chronological history of site activities is provided in Appendix B. No permits were issued or
required for soil remediation during this period.
During the August, September, and October 2023 operating period, costs for soil and
groundwater remediation were pre-approved on ePATA 29796-040 that authorized $4,965
toward system maintenance, parts, and operating costs.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 15 97 Fayetteville St, Parkton, Robeson County, NC
5.0 GROUNDWATER ASSESMENT AND REMEDIATION
Assessment:
As part of assessment efforts, Terraquest sampled monitoring wells MW1, MW3, MW4, MW9-
14, MW16, MW17, MW18, MW21, MW22, MWB, and MWC on June 28, 2023 following technical
methods and standard procedures in Appendix A. The samples were submitted for VOC analysis
per method 6200B + 5 oxygenates.
As shown on Table 8, petroleum type compounds were reported for multiple wells. However,
no free product was gauged, and no Gross Contamination Level (GCL) violations were reported.
Monitoring well MW10 had benzene and MTBE concentrations reported above the Record of
Decision-directed Target Cleanup Concentration (ROD TCC). No other TCC violations were
reported. Monitoring wells both on and offsite (MW13) had 2L Standard violations. The
estimated extent of TCC violations is limited to a small area around monitoring well MW10. The
2L Standard plume covers an area of 14,000 square feet that is approximately the same size and
shape as data from the December 2022 sampling event revealed. The Type III well MW12 is
absent 2L Standard violations for the fourth sampling in a row. Remediation appears to be
working well. The data is summarized on Figure 7.
The Town Well #1 was not sampled as part of this monitoring event as its pump was down for
repairs. Terraquest recommends continuing to sample this well when it is back online.
Historical groundwater analytical data, including graphs, is provided in Appendix C.
Remediation:
The approved and implemented Corrective Action Plan uses four sets of nested shallow and deep
air sparge wells to remediate the onsite aquifer. During the installation process, underground
piping was installed to connect the wells with a rotary screw air compressor.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 16 97 Fayetteville St, Parkton, Robeson County, NC
Flow rates and pressures for the groundwater remediation system are detailed on the inspection
sheets in Appendix E. System operation and maintenance was conducted once per month.
Maintenance activities followed the manufacturer’s recommendations as possible with cost
reductions from the NC Leaking UST Trust Fund. A chronological history of site activities is
provided in Appendix B. No permits were issued or required for soil remediation during this
period. The system generally ran well.
6.0 CONCLUSIONS
Soil and groundwater remediation continues at the site with the operation of an SVE and air
sparge treatment system. Terraquest recommends the continued operation of the system and
groundwater monitoring per the ROD. As contaminant concentrations in monitoring well MW10
had not decreased at the same rate as other wells at the site, Terraquest previously applied
peroxide to that well. Groundwater sampling results from the June 2023 sampling event indicate
that TCC violations remain in monitoring well MW10 preventing closure. As recommended by
the NCDWM-UST, Terraquest has added a sparge well in the vicinity of monitoring well MW10.
A report on those actions is forthcoming.
7.0 LIMITATIONS
This report is limited to the investigation of petroleum-type compounds and does not imply that
other unforeseen adverse impacts to the environment are not present at the facility. In addition,
subsurface heterogeneities not identified during the current study may influence the migration
of groundwater or contaminants in unpredicted ways. The limited amount of sampling and
testing conducted during this study cannot practically reveal all subsurface heterogeneities.
Furthermore, the subsurface conditions, particularly groundwater flow, elevations, and water
quality may very through time. The opinions and conclusions arrived at in this report are in
accordance with industry-accepted geologic and hydrogeologic practices at this time and
location. No warranty is implied or intended.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 17 97 Fayetteville St, Parkton, Robeson County, NC
REFERENCE
Brown, et al., 1985. Geologic Map of North Carolina, North Carolina. Department of Natural
Resources and Community Development, 1:500,000 scale.
Corrective Action Performance Report (8,9,10/2023) Parnell Oil Company, Inc.
By: Terraquest Environmental Consultants, P.C. POCO Shop #1
Report Prepared: October 30, 2023 18 97 Fayetteville St, Parkton, Robeson County, NC
CERTIFICATION
1 Enter the date the monitoring report was due: 11/30/2023 Will this report be submitted after the
established due date?
YES NO X
2 Was any required information from the above template missing from this report? YES NO X
IF the answer to question #1 or# 2 is “YES”, please provide additional information in this cell to explain what was missing and why.
3 If applicable, will any of the proposed attenuation milestones under the schedule approved in the Corrective Action Plan not be met? (within a reasonable margin of error) YES NO X
IF the answer to question #3 is “NO”, skip to the certification under #8 below.
IF the answer to question #3 is “YES”, please generally describe in this cell the possible reason(s) and outline proposed remedies. (This should be described in more detail in the report text above.)
4 Does any known or suspected source zone soil contamination or free product remain outside of the assessed area that could be inhibiting natural attenuation? YES NO
5 Has there been an unexpected increase in contaminant mass sufficient to suggest a potential new release from a separate onsite or offsite source? YES NO
IF the answer to either question #4 or #5 is “YES”, generally describe in this cell any actions recommended to further assess or clean up this known or
suspected source. (This should be described in more detail in the report text above.) 6 Certification:
I, Michael J. Brown, a Licensed Geologist and I, John S. Haselow, a Licensed Engineer in the State of North
Carolina for TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. do certify that the information contained in
this report is correct and accurate to the best of my knowledge. All work was performed under my direct
supervision. My seal and signature are affixed below. Additional seals and/or signatures are also listed.
Terraquest Environmental Consultants, P.C. is licensed to practice geology and engineering in North Carolina.
The geology certification number of the corporation is C-291. The engineering certification number of the
corporation is C-4634. Engineering is practiced out of the Cary, NC office.
TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C.
Ryan D. Kerins Michael J. Brown, P.G. John Haselow, PhD, PE
Project Manager President Senior Engineer
TABLES
Table 1
Date: 10/17/23 Facility ID No: 0-021993
Capacity
UST Product (Gallons)Dimensions Release Discovered
T1 Gasoline 6,000 8' x 16'9/26/88 -Yes
T2 Gasoline 6,000 8' x 16'9/26/88 -Yes
T3 Gasoline 6,000 8' x 16'9/26/88 -Yes
AST1 Kerosene 1,000 48" x 129"unknown -No
Notes:
1. Information obtained from the North Carolina UST Database Records and field observations.
2. T = UST
3. All tanks are of single walled steel construction.
4. Tank tightness report submitted by Charles Broadfoot Associated, Inc. indicates the installation date as 3/15/1987, and upgrade date as 2/15/1994.
SITE HISTORY (UST and AST SYSTEM INFORMATION)
Incident Name: POCO Shop #1 Incident No. 29796
Date Installed Date Closed
Table 2
Date: 10/17/23 Facility ID No: 0-021993
Tax Parcel Number (PIN Number)Property Owner Property Owner Address Property Address
949169869100 Granville Jackson c/o William Jackson Fayetteville Street
Mary Evelyn Jackson 4923 Cypress Rd Parkton, NC 28371
Fayetteville, NC 28304000
949179055500 Harace W. Parnell 128 Legacy Trail Drive 204 Fayetteville Street
Geneva E Parnell La Verina, TX 78121 Parkton, NC 28371
949169948000 Berline Bulla Bodenheimer 1582 Blue Road 202 Fayetteville Street
Dorothy McNeil Bodenheimer Parkton, NC 28371 Parkton, NC 28371
949169812500 Parkton Baptist Church Ist & Fayetteville Street 28 Fayetteville Street
Parkton, NC 28371 Parkton, NC 28371
949169547300 COLE FD PORTFOLIO VIII, LLC 10301 Monroe Rd 52 E. David Parnell Street
Matthews, NC 28105 Parkton, NC 28371
949169850200 Roger Hall Jr 1/3 INT &118 Bayshore Dr David Parnell Street
Elise McIntosh 1/3 INT &Parkton, NC 28371 Parkton, NC 28371
Sally H Overton 1/3 INT
949169525541 Chazen Wolfe, LLC 104 Tiburon Blvd., Suite 100 29 S. Fayetteville Street
Mill Valley, CA 94941-2431 Parkton, NC 28371
949169844900 Alhobishi Convenience Stores & Rentals 7509 Phillipi Church Road 97 N. Fayetteville Street
c/o Fadhl Alhobishi (910) 583-7565 Raeford, NC 28376 Parkton, NC 28371
alhobishifadhl@yahoo.com
Abdu Alhobishi (910) 258-3823
Notes:
1. Information gathered from field interviews and Robeson County GIS Online.
2. Last 4 digits of MAP ID numbers correspond with those displayed on Figure 2.
SURROUNDING PROPERTY OWNERS
Incident Name: POCO Shop #1 Incident No. 29796
SITE
Table 3
Date: 10/17/23 Facility ID No: 0-021993
Well Depth Type Casing Depth Screen Interval Distance from Source
Well ID No. Well Owner/Address Well Address Well Use (feet BGS)of Well (feet BGS)(feet BGS)Area of Release (feet)
Town of Parkton
Well #1 PO Box 55 Ist Street Municipal 142 Drilled 0-70 70-100 700
Parkton, NC 28371 Parkton, NC 28371 100-113 113-125
Town of Parkton
Well #4 PO Box 55 Poplar Street Municipal 148 Drilled 0-90 90-125 1,410
Parkton, NC 28371 Parkton, NC 28371 Emergency Use Only 125-135 135-140
Debra Towery
PW1 PO Box 272 247 Second Street Irrigation Unknown Drilled Unknown Unknown 888
Parkton, NC 28371 Parkton, NC 28371
Terry A. Powell
PW2 248 E. David Parnell Street 248 E. David Parnell Street Irrigation Unknown Drilled Unknown Unknown 1,013
Parkton, NC 28371 Parkton, NC 28371
William W. Proctor
PW3 PO Box 176 170 S. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,302
Parkton, NC 28371 Parkton, NC 28371
Proctor Brothers Nursery
PW4 PO Box 143 170 S. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,531
Parkton, NC 28371 Parkton, NC 28371
Carolyn Hughes
PW5 PO Box 126 201 Third Street Irrigation Unknown Drilled Unknown Unknown 1,021
Parkton, NC 28371 Parkton, NC 28371
Thomas H. Lanier
PW6 282 N. Fayetteville Street 282 N. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,060
Parkton, NC 28371 Parkton, NC 28371
James McCarty
PW7 PO Box 343 308 N. Fayetteville Street Irrigation Unknown Drilled Unknown Unknown 1,142
Parkton, NC 28371 Parkton, NC 28371
Notes:
1. "BGS" = feet below ground surface, "NA" = not applicable.
2. Information obtained from Terraquest field interviews and Robeson County GIS.
3. Well ID numbers are displayed on Figure 2.
WATER SUPPLY WELL INFORMATION
Incident Name: POCO Shop #1 Incident No. 29796
8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260B8260BMADEP VPHMADEP VPHMADEP VPHDate Collected Sample Depth
B1 1/7/13 5.5 - 6 0.17 2.83 11 34.5 <0.056 <0.058 <1.1 2.58 0.955 <0.067 <0.056 1.83 0.557 <0.28 <0.28 11.2 7.49 50.1 13.3 70.2 51 108B21/7/13 5.5 - 6 0.0319 0.0238 0.0976 0.0663 0.0119 <0.00092 0.0845 0.0047 0.0023 J <0.0011 <0.00089 0.0072 <0.0012 0.0058 J <0.0045 0.0437 0.0341 0.0628 0.0128 2.52 <1.7 <1.7B31/7/13 3 - 5 0.0064 0.0032 J 0.0135 0.0042 J 0.0040 J <0.00092 0.0531 0.0012 J <0.0011 <0.0011 <0.00090 0.0016 J <0.0012 <0.0045 0.0069 J 0.0092 0.0065 0.0112 0.0017 J <1.9 <1.9 <1.9B41/7/13 3 - 5 0.0775 0.0117 0.234 J 0.2625 0.0276 <0.00086 0.0475 0.0191 0.0065 <0.0010 <0.00084 0.0274 0.0035 J <0.0042 <0.0042 0.258 J 0.0956 0.680 0.0807 3.56 <2 5.02
B5 1/7/13 3 - 5 0.0381 0.0039 J 0.0151 0.0381 0.0021 J <0.00087 0.0439 0.0063 0.0023 J <0.0010 <0.00084 0.0067 <0.0011 <0.0042 <0.0042 0.0222 0.0250 0.0048 0.0016 J 2.59 <1.8 <1.8B61/7/13 3 - 5 0.165 0.0540 0.129 0.164 0.131 0.0045 J 0.115 0.0043 J 0.0018 J <0.0011 <0.00091 0.0071 <0.0012 <0.0046 <0.0046 0.0123 0.0227 0.0444 0.0102 5.68 <1.9 1.96B71/7/13 3 - 5 0.389 0.0091 0.646 0.0672 0.817 0.0082 0.0666 0.0077 0.0052 <0.0010 <0.00086 0.0252 <0.0043 <0.0043 <0.0043 0.247 0.291 0.388 0.0272 4.25 <1.9 2.09B81/7/13 3 - 5 0.0404 0.0031 J 0.0691 0.0070 J 0.0062 <0.00098 <0.019 0.0026 J 0.0015 J <0.0011 <0.00095 0.0063 <0.0012 <0.0048 <0.0048 0.0103 0.0182 <0.0010 <0.0011 <1.9 <1.9 <1.9B91/7/13 3 - 5 0.297 0.0188 0.611 0.179 0.0162 <0.00079 <0.015 0.0162 0.0104 <0.00092 <0.00077 0.0411 0.0012 J 0.0102 J <0.0039 0.357 0.124 0.130 0.0188 7.63 <2 5.62B101/7/13 3 - 5 0.0120 0.0034 J 0.0199 0.0072 J 0.0013 J <0.00087 <0.017 0.0012 J 0.0013 J <0.0010 <0.00085 0.0022 J <0.0011 <0.0042 <0.0042 0.0045 0.0075 0.0097 0.0013 J 3 <1.8 <1.8B111/7/13 6 - 8 4.35 35.2 17.6 95.5 0.639 <0.067 <1.3 2.51 0.971 <0.077 <0.065 2.41 0.529 <0.32 <0.32 7.85 9.72 47.6 13.4 469 139 369
B11 1/7/13 15 - 18 2.86 17.7 4.60 22.7 0.880 <0.059 <1.2 0.362 0.142 J <0.069 <0.058 0.484 <0.076 <0.29 <0.29 0.925 1.74 8.10 2.54 73.9 15.3 36.2B121/7/13 8 - 10 4.27 7.31 6.09 22.8 0.262 <0.060 <1.2 0.904 0.300 <0.069 <0.058 0.695 0.186 J <0.29 <0.29 2.51 2.95 14.7 4.98 1,490 251 790B131/7/13 8 - 10 14.2 177 82.3 420 <0.23 <0.24 <4.6 10.2 3.90 <0.27 <0.23 9.79 2.07 <1.1 <1.1 35.2 39.6 192 60.5 1,080 270 800B141/7/13 8 - 10 0.0768 0.0021 J 0.156 0.0050 J 0.0025 J <0.00099 <0.019 0.0024 J 0.0024 J <0.0011 <0.00096 0.0119 <0.0013 <0.0048 <0.0048 0.0169 0.0339 <0.0010 <0.0010 <1.8 <1.8 <1.8
B15 1/7/13 8 - 10 0.0370 0.0027 J 0.0782 0.0040 J <0.00079 <0.00081 <0.016 0.0019 J 0.0014 J <0.00094 <0.00079 0.0066 <0.0010 <0.0040 <0.0040 0.0034 J 0.0183 0.0025 J <0.00083 <1.9 <1.9 <1.9
B16 1/7/13 6 - 8 1.58 0.156 J 4.30 3.68 <0.057 <0.059 <1.1 0.690 0.703 <0.068 0.0692 J 1.71 <0.074 <0.28 <0.28 8.53 3.97 0.230 J 0.555 735 99.8 217
B17 11/11/13 3 - 5 <0.00045 <0.00052 0.00079 J 0.00473 <0.00061 <0.0011 0.030 <0.00078 <0.00058 <0.00074 <0.0010 <0.00067 <0.00071 <0.0029 <0.0020 <0.0012 <0.00069 <0.00064 <0.00072 <0.642 <0.642 <0.214B1811/11/13 3 - 5 0.086 0.014 0.16 0.1876 0.014 <0.0011 0.16 <0.00074 <0.00055 <0.00070 <0.00067 0.011 0.00098 <0.0027 <0.0019 0.052 0.033 0.13 0.023 39.6 84.3 50.8B1911/11/13 3 - 5 0.11 0.0094 0.36 D 0.167665 <0.00064 <0.0012 <0.0064 0.084 0.033 <0.00077 <0.00074 0.083 <0.00074 <0.0030 <0.0021 0.12 0.090 D 0.34 E 0.045 3.96 3.17 1.58B2011/11/13 3 - 5 <0.00041 <0.00047 0.00081 0.002275 <0.00056 <0.0010 0.050 <0.00071 <0.00053 <0.00053 <0.00064 <0.00061 <0.00064 <0.0026 <0.0018 <0.0010 <0.00063 <0.00058 <0.00065 5 4.17 1.67B2111/11/13 3 - 5 0.043 0.0017 0.093 0.04329 0.028 <0.0010 0.14 0.00087 <0.0052 <0.00066 <0.00063 0.0055 <0.00063 <0.0025 0.020 0.00087 0.017 0.028 0.0026 <0.632 <0.632 1.26
B22 11/11/13 3 - 5 0.11 0.020 0.68 D 0.3012 0.059 <0.00096 0.12 <0.00067 <0.00050 <0.00063 <0.00061 0.017 0.0018 <0.0025 0.018 0.081 0.055 1.3 0.069 4.52 5.34 3.70B2311/11/13 3 - 5 0.084 0.018 0.48 D 0.1661 0.11 <0.00088 0.11 <0.00061 <0.00046 <0.00058 <0.00056 0.019 0.0039 <0.0023 0.032 0.070 0.062 1.1 0.61 3.29 3.65 2.56B2411/11/13 3 - 5 <0.00046 <0.00053 0.0018 0.002421 J 0.0054 <0.0011 0.16 <0.00079 <0.00059 <0.00075 <0.00072 <0.00068 <0.00072 0.011 0.015 0.010 0.0011 0.0045 <0.00073 <0.745 <0.745 <0.248B2511/11/13 3 - 5 0.010 0.0046 0.0087 0.00903 0.0023 <0.0011 0.077 0.0071 0.0029 <0.00074 <0.00072 0.0053 <0.00071 <0.0029 <0.0020 0.058 0.022 0.0026 <0.00073 <0.688 <0.688 1.38B2611/11/13 3 - 5 0.01 0.0018 0.097 0.01246 0.013 0.0066 0.17 0.0016 0.0017 <0.00081 0.00078 0.0079 0.00100 <0.0031 0.026 0.046 0.027 <0.00070 <0.00079 4.38 <0.657 1.31B2711/11/13 3 - 5 0.81 0.0038 0.44 D 0.01201 2.6 0.019 <0.0060 0.0038 0.0026 <0.00072 <0.00070 0.014 <0.00069 <0.0028 <0.0020 0.062 0.039 0.0024 0.0017 4.91 <0.670 1.34B2811/11/13 3 - 5 1.1 0.0077 1 D 0.02658 1.7 0.0094 <0.0060 0.0066 0.0042 <0.00073 <0.00070 0.023 <0.00070 <0.0028 <0.0020 0.048 0.068 0.014 0.0029 6.06 <0.650 1.73
B29 11/11/13 3 - 5 0.62 0.0024 0.39 D 0.01294 0.95 0.0064 <0.0056 0.0054 0.0032 <0.00068 <0.00065 0.018 <0.00065 <0.0026 <0.0018 0.096 0.050 0.0037 0.0021 3.08 <0.578 1.16B3011/11/13 3 - 5 0.23 0.019 0.010 D 0.2406 0.20 <0.0012 <0.0065 0.050 <0.00062 0.011 <0.00075 0.14 <0.00075 <0.0030 <0.0021 0.013 D 0.0036 D 0.040 0.051 29.7 22.4 8.60.0056 4.3 4.9 4.6 0.091 0.37 24 4.3 3.3 3.4 0.032 1.7 0.12 NE 16 0.16 1.7 8.5 8.3 68 540 31181,200 1,560 3,129 350 156 14,000 626 626 626 110 1,564 100 NE 9,385 313 626 782 782 939 1,500 46916432,000 40,000 81,760 3,100 4,088 360,000 16,350 16,350 16,350 1,000 40,880 4,000 NE 245,280 8,176 16,350 20,440 20,440 24,528 40,000 12,264Notes:
1. All results in mg/kg = parts per million 2. Bold denotes a compound detection. Shading denotes a STG-MSCC violation. 3. < - denotes less than sample detection limit.4. Sample depths are in feet below ground level.
5. MSCC = Maximum Soil Contaminant Concentration6. "Italics" indicates a Residential MSCC violation.7. "D" = The sample(s) were diluted due to targets detected over the highest point of the calibration curve, or due to matrix interference. Dilution factors are included in the final results. The result is from a diluted sample.
8. "E" = The date exceeds the upper calibration limit; therefore, the concentration is reported as estimated. When the samples were run diluted, the results were below the remorting limit…most likely due to sample heterogeneity.9. "J" = The target analyte was positively identified below the quantitation limit and above the detection limit.
Facility ID No: 0-021993
4-Methyl-2-pentanoneResidential MSCCIndustrial /Commercial MSCC
Table 4
IPEAcetone1,1-DichloroethaneMethyl ethyl ketoneSoil to groundwater MSCC
Sample ID sec-ButylbenzeneIsopropylbenzenep-IsopropyltolueneNaphthaleneEthylbenzeneTotal XylenesC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 AromaticsMTBEn-Butylbenzenen-Propylbenzene1,2,4 TrimethylbenzeneSUMMARY OF SOIL SAMPLING RESULTSIncident Name: Poco Shop #1 Incident No.: 29796
Analytical Method
Contaminant of Concern
BenzeneToluene1,3,5 TrimethylbenzeneDate: 10/17/23
tert-Butylbenzene
Table 5
Date: 10/17/23 Facility ID No. 0-021993
Well ID Date Installed
Date Water
Level
Measured
Screened Interval (x
to y feet BGS)
Bottom of Well
(feet BGS)
Top of
Casing
Elevation
(feet)
Depth to Water
from Top of
Casing (feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation (feet)CommentsMW11/7/13 6/28/23 5-17 17 99.33 7.45 0 91.88 Type II Groundwater Monitoring Well
MW2 3/13/13 -5-15 15 98.87 ---Type II Groundwater Monitoring Well
MW3 3/13/13 6/28/23 5-15 15 98.87 7.27 0 91.60 Type II Groundwater Monitoring Well
MW4 3/13/13 6/28/23 5-15 15 99.32 7.03 0 92.29 Type II Groundwater Monitoring Well
MW9 11/11/13 6/28/23 4-19 19 98.72 6.93 0 91.79 Type II Groundwater Monitoring WellMW1011/12/13 6/28/23 5-20 20 98.56 7.00 0 91.56 Type II Groundwater Monitoring WellMW1111/12/13 6/28/23 5-20 20 99.30 7.54 0 91.76 Type II Groundwater Monitoring WellMW1211/12/13 6/28/23 OC: 20 IC: 30 30-35 35 99.54 8.02 0 91.52 Type III MW / Deep air sparge pointMW138/19/14 6/28/23 4-19 19 99.02 7.47 0 91.55 Type II Groundwater Monitoring WellMW148/19/14 6/28/23 5-20 20 99.50 8.00 0 91.50 Type II Groundwater Monitoring Well
MW16 8/19/14 6/28/23 4-19 19 98.64 6.84 0 91.80 Type II Groundwater Monitoring Well
MW17 3/9/15 6/28/23 5-20 20 97.70 6.00 0 91.70 Type II Groundwater Monitoring Well
MW18 3/9/15 6/28/23 5-20 20 96.86 5.30 0 91.56 Type II Groundwater Monitoring Well
MW19 3/9/15 -4-19 19 95.67 ---Type II Groundwater Monitoring WellMW203/10/15 -5-20 20 96.49 ---Type II Groundwater Monitoring WellMW213/9-10/21 6/28/23 OC: 20 IC: 30 30-35 35 87.58 6.75 0 80.83 Type III Groundwater Monitoring WellMW223/9-10/21 6/28/23 OC: 20 IC: 30 30-35 35 96.74 5.30 0 91.44 Type III Groundwater Monitoring WellMWB10/5/17 6/28/23 5-15 15 99.09 7.46 0 91.63 Type II Groundwater Monitoring Well
SVE1 10/3/17 -3-10 10 99.36 ---SVE (Pilot Test) Well
SVE2 3/8/21 -3-10 10 99.84 ---SVE well
SVE3 3/8/21 -3-10 10 100.11 ---SVE wellSVE43/8/21 -3-10 10 100.14 ---SVE wellSVE53/8/21 -3-10 10 99.88 ---SVE wellSVE63/8/21 -3-10 10 99.32 ---SVE wellSVE73/8/21 -3-10 10 98.83 ---SVE well
SVE8 3/8/21 -3-10 10 99.30 ---SVE well
SVE9 3/8/21 -3-10 10 99.76 ---SVE well
SVE10 3/8/21 -3-10 10 99.61 ---SVE well
MWA 10/4/17 -3-10 10 99.49 ---SVE Pilot Test Well
MWC 10/6/17 6/28/23 20-25 25 99.21 7.78 0 91.43 Type II MW / Shallow air sparge wellAS13/9/21 -30-35 35 99.85 ---Deep air sparge wellAS23/9/21 -20-25 25 99.90 ---Shallow air sparge wellAS33/9/21 -30-35 35 99.01 ---Deep air sparge wellAS43/9/21 -20-25 25 99.03 ---Shallow air sparge well
AS5 3/9/21 -30-35 35 99.24 ---Deep air sparge well
AS6 3/9/21 -20-25 25 99.26 ---Shallow air sparge well
MW15 8/19/14 -5-20 20 99.63 ---abandoned Type II well
Notes:1. "BGS" = below ground surface 2. "-" information not available3. "OC"=Outter Casing; "IC"=Inner Casing4. "-"= Not Measured
MONITORING WELL CONSTRUCTION INFORMATIONIncident Name: POCO Shop #1 Incident No. 29796
Well Casing Depth (feet
BGS)55
5
5
4
5
5
454
5
5
4
5
5 Remedial and Pilot Test Wells:
3
3
3
33333
3
2030
20
5
3
3
20
302030
Table 6
Date: 10/30/23
EPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHEPA Method 18M BTEX+TPHWell ID Date Collected
SVE blower at full power with air sparge on (only ran for long enough to get sample. Then shut air sparge off.)
SVE STACK 8/3/21 78,000 18,400 14,300 20,700 < 5490 4,720,000
SVE at half power - air sparge off:
SVE Stack 9/9/21 1,700 2,010 296 1,850 < 277 180,000
SVE at half power - air sparge on at low flow:
SVE Stack 10/13/21 6,650 4,020 < 124 914 < 499 269,000
SVE STACK 11/14/21 5,430 7,830 565 5,150 4,940 241,000
SVE Stack 12/6/21 4,100 5,970 238 1,710 < 499 185,000
SVE STACK 1/12/22 1,060 646 < 124 458 < 499 61,800
SVE STACK 2/7/22 704 1,310 < 124 732 < 499 25,600
SVE Stack 3/2/22 3,200 9,690 812 11,600 < 499 128,000
SVE STACK 4/6/22 518 1,680 211 2,380 < 499 39,200
SVE STACK 5/4/22 370 592 < 124 4,180 < 499 39,200
SVE STACK 6/2/22 2,200 785 159 1,140 < 499 188,000
SVE STACK 7/7/22 1,010 1,110 276 1,700 <999 378,000
SVE STACK 8/10/22 405 574 < 124 426 < 499 163,000
SVE STACK 9/8/22 166 383 < 124 < 368 < 499 114,000
SVE STACK 10/5/22 < 125 < 260 < 124 < 368 < 499 < 12,200
SVE STACK 11/10/22 < 125 279 148 < 368 < 499 25,500
SVE STACK 12/5/22 922 1150 < 124 1990 < 499 122,000
SVE Stack 1/3/23 282 < 260 < 124 < 368 < 499 44,000
SVE STACK 2/8/23 < 125 < 260 < 124 < 368 < 499 < 12,200
SVE STACK 3/2/23 < 125 < 260 < 124 < 368 < 499 < 12,200
SVE Stack 4/13/23 < 125 < 260 < 124 < 368 < 499 < 12,200
SVE STACK 5/4/23 < 125 < 260 < 124 < 368 < 499 < 12,200
SVE STACK 6/6/23 341 < 260 < 124 < 368 < 499 23,100
SVE STACK 7/11/23 387 < 260 < 124 < 368 < 499 27,600
SVE STACK 8/8/23 < 125 343 <124 <368 <499 121,000
SVE STACK 9/7/23 < 125 < 260 < 124 < 368 < 499 < 12,200
SVE STACK 10/12/23 < 125 < 260 < 124 714 < 4.99 31,600
Notes:
1. All results in parts per billion volume (ppbv) except as noted.
2. BOLD - denotes a detected concentration.TPH GROIncident Name: POCO Shop #1 Incident No. 29796
SUMMARY OF AIR SAMPLING RESULTS
Facility ID No. 0-021993
Analytical Method
Contaminant of Concern
BenzeneTolueneTotal xylenesEthylbenzeneMTBE
Table 7
Date: 10/30/23
OPERATING/MONITORING PERIOD:START: 8/1/2023 END:10/31/2023
AIR SPARGE AND SVE SYSTEM CALCULATIONS
Avg. vacuum pressure in inches of water at blower:40 in. H2O
measurement taken upstream of filter.
From the blower performance curve, at a vacuum pressure of:40 in. H2O
this model produces (scfm flow rate) 200 scfm:200 scfm
Is the dilution valve open? Subtract dilution flow rate:0 scfm
TPH concentration of vapors at stack for this period:54,933 ppbv
Volume of air removed in ft3 equals (flow)(60 min/hr)(hours in this period - time not running)1,092,000 ft3
Volume of gasoline vapor removed is equal to air volume removed
muliplied by the TPH concentration.
Vol. air removed (ft 3) x [TPH concentration of vapor (ft 3 gasoline vapor/1E+09 ft 3 air)]60 ft3 gasoline
vapor
1 ft3 vapor equals 7.48 gal.
1 gal. equal 3.78 liters
ft 3 gasoline vapor x 7.48 gal./ft3 x 3.78 liters/gal. equals liters gasoline vapors.1,696 liters gasoline
vapor
At standard temperature and pressure, there are 22.4 liters
of gasoline vapor per mole of gasoline. The molecular wt.
of carbon in gasoline is 89 g/mole.
89 g/mole x (1mole/22.4 liters) equals:3.97 g/liter
Amount of Contaminant Removed
gasoline vapor (liters) x (3.97 g/liter) x (0.001 kg/ g) equals kg vapor 6.73 kg gas VOCs
basline soil contaminant mass:1,606 kg
baseline groundwater contaminant mass:108,321 kg
8/3/2021 0 0
OPERATING/MONITORING PERIOD:8/3/21 10/31/21 Period recovered:246.76 kg 246.76 kg
11/1/22 1/31/22 Period recovered:239.17 kg 485.93 kg
2/1/22 4/30/22 Period recovered:91.41 kg 577.34 kg
5/1/22 7/31/22 Period recovered:79.48 kg 656.82 kg
8/1/22 10/31/22 Period recovered:11.38 kg 668.20 kg
11/1/23 1/31/23 Period recovered:7.82 kg 676.02 kg
2/1/23 7/31/23 Period recovered:2.57 kg 678.59 kg
8/1/23 10/31/23 Period recovered:6.73 kg 685.32 kg
685.32 gallons
HISTORICAL RECOVERY:
this period cumulative since start
Total recovery:
CONTAMINANT MASS REMOVAL CALCULATIONS
Incident Name: POCO Shop #1 Incident No. 29796 Facility ID No. 0-021993
Conversions:
Conversions:
Therefore:
0
100
200
300
400
500
600
700
800
Incident Name: POCO Shop #1 Incident No. 29796
kg of contaminant recovered SVE and air sparge vapors:
Table 8
Date: 10/17/23
6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200BWell ID Date CollectedMW16/28/23 123 520 20.9 327 18.2 < 1.00 < 4.10 2.85 J < 13.0 < 7.00 < 9.00 90.1 J 2.75 J 1.12 J 83.1 < 120 < 2.65 < 15.0 < 3.80 < 3.45 211 4.6 JMW36/28/23 < 0.500 44.8 7.9 208 1.7 < 0.200 24.3 21.3 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 4.34 J < 0.760 < 0.690 9.55 J < 0.230MW46/28/23 83.8 1,510 214 9,820 13.7 J < 4.00 1,510 588 < 52.0 < 28.0 < 36.0 < 200 < 10.0 < 3.00 < 18.0 < 480 14.4 J 425 < 15.2 21.8 107 J < 4.60MW96/28/23 493 1,040 85.5 519 190 2.13 J 68.3 22.8 < 26.0 < 14.0 < 18.0 < 100 < 5.00 < 1.50 < 9.00 < 240 < 5.30 36 J < 7.60 < 6.90 97.9 J 4.99 JMW106/28/23 4,120 9,300 580 3,500 1,010 23.3 J 336 104 < 260 < 140 < 180 < 1000 < 50.0 < 15.0 < 90.0 < 2400 < 53.0 < 300 < 76.0 < 69.0 1,060 53 JMW116/28/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230MW126/28/23 < 0.500 < 0.900 < 0.500 < 1.60 2.16 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230MW136/28/23 3.98 18.2 105 597 < 0.220 < 0.200 261 57.3 2.99 J < 1.40 < 1.80 16.1 J < 0.500 < 0.150 < 0.900 < 24.0 3.75 48.7 3.43 10.3 < 4.50 < 0.230MW146/28/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230MW166/28/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230MW176/28/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230MW186/28/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230
MW21 6/28/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230
MW22 6/28/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 < 2.60 < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 28.5 J < 0.530 < 3.00 < 0.760 < 0.690 < 4.50 < 0.230
MWB 6/28/23 93.6 1,110 132 2,220 17.3 < 1.00 369 113 < 13.0 24.4 J 9.27 J 86.8 J < 2.50 < 0.750 < 4.50 < 120 6.59 178 < 3.80 8.02 301 8.89
MWC 6/28/23 < 0.500 < 0.900 < 0.500 < 1.60 290 0.376 J < 0.820 < 0.560 4.15 J < 1.40 < 1.80 < 10.0 < 0.500 < 0.150 < 0.900 < 24.0 < 0.530 < 3.00 < 0.760 < 0.690 7.87 J 3.33 JROD TCC 2,050 none none none 1,000160060050020 70 400 400 4,000 40 100 6,000 0.6 4.0 70 4,000 70 6 70 70 40 1285,000 260,000 84,500 85,500 20,000 70,000 28,500 25,000 4,000,000 40,000 100,000 6,000,000 600 4,000 70,000 4,000,000 25,000 6,000 6,900 30,000 4,000 128,000Notes:1. All results in µg/L2. Bold denotes a compound detection 3. Shading denotes a 2L Standard violation4. Italics indicates a GCL violation5. < - denotes less than sample detection limit6. Dots within the cell indicates a TCC violation. 7. ROD TCC = Record of Decision Target Cleanup Concentrations. 8. "J" Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.
SUMMARY OF GROUNDWATER SAMPLING RESULTS
Incident Name: Poco Shop #1 Incident No. 29796
Analytical Method
Contaminant of Concern
BenzeneTouleneEthylbenzeneTotal XylenesEthanolIsopropylbenzeneChloroformMTBEIPE4-Methyl-2-pentanone (MIBK)Acetone1,2,4-Trimethylbenzene1,3,5-Trimethylbenzene2-Butanone (MEK)2-HexanoneGCL2L Standard BromodicloromethaneChlorobenzeneN-Propylbenzenet-Amyl alcoholNaphthalenen-ButylbenzeneTert-amyl methyl ether
FIGURES
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.
APPENDIX A
Page 1 of 8
TECHNICAL METHODS/STANDARD PROCEDURES
Equipment Decontamination
All soil sampling equipment utilized during site assessment activities is decontaminated according
to standard and accepted protocol. Cleaning solutions range from clean potable water to acidic
solutions or organic solvents depending on the contaminants present at the site. Equipment
utilized at sites, such as hand augers, contaminated with petroleum hydrocarbons, is generally
decontaminated with a low‐sudsing detergent such as Luiquinox® and triple rinsed with distilled
water. Larger equipment, such as drill rigs and associated tools, is steam cleaned. All
decontamination procedures are completed within an established decontamination area which is
located away from the active study area. Frequency of equipment decontamination depends on
the nature of work being performed, but in no case is decontamination performed less frequently
than once per test (i.e., soil boring, well installation, sample collection, etc.). Equipment blanks are
collected as a quality control measure when required by job specifications.
Soil Boring Installation
Soil borings are completed using hand‐operated sampling tools, truck‐mounted drills, or
Geoprobe® drilling rigs depending on the depth of sample collection and other site‐specific
conditions. Hand operated stainless‐steel bucket augers are utilized to collect soil samples at
regular intervals to determine site stratigraphy and to test for the presence of volatile organic
compounds. Samples retrieved from the hand auger are necessarily disturbed during the augering
process, but can provide accurate information on soil type and contaminant concentrations when
properly interpreted. Soil samples from hand augered borings are generally retrieved at one to
two foot intervals.
Truck‐mounted or Geoprobe® drilling equipment is often utilized when sample retrieval depths
exceed twenty feet or subsurface conditions prevent utilization of hand augers (i.e., buried rocks,
wood, bricks or other materials occur in the subsurface). Truck‐mounted drilling rigs usually
retrieve soil via a hollow‐stem auger/split spoon collection method. Geoprobe® rigs usually employ
a Macro‐Core® tube retrieval system.
Hollow stem augers provide relatively undisturbed 2‐foot cores of soil samples. Soil samples are
generally collected at five foot intervals utilizing standard penetration test procedures as defined
by the American Society for Testing and Materials (ASTM) or are pushed to the desired depth using
the head of the drill rig. The standard penetration test involves driving a 2" outside diameter by 1‐
3/8" inside diameter split‐spoon sampler a minimum distance of one foot with a 340‐lb. slide
hammer falling a distance of 30 inches.
A Geoprobe® rig is a hydraulically‐powered soil probing machine. The probe utilizes static force
and percussion to advance a small diameter sampling device into the subsurface. The sampling
apparatus provides relatively undisturbed 5‐foot cores of soil samples. Soil samples are collected
Page 2 of 8
continuously. The Macro‐Core® tube contains an inserted poly‐vinyl chloride (PVC) liner which
retains the soil sample as the tube is driven into the ground. The Macro‐Core® tube is
decontaminated between each 5‐foot sample interval in a soil boring using a Liquinox and tap‐
water mixture. A new PVC liner is used to collect soil from each sample interval in a soil boring.
Soil samples retrieved from the hollow‐stem augers or Geoprobe are then carefully described
according to the Unified Soil Classification System. Soil descriptions are recorded on a soil
boring log.
Soil Sampling
Soils to be analyzed by a North Carolina‐certified laboratory are prepared according to the specified
analytical method. Initially, soil samples are removed from the ground using either a hand auger,
backhoe bucket, spilt spoon auger, or a Macro‐Core® sampling tube. During the removal, care is
taken to keep the disturbance of the soil structure to a minimum to reduce the loss of
contaminants. Once removed, the samples are placed in the proper sample container for the
specified analytical method. For samples collected for the MADEP VPH and EPA Method 8260, a
TerraCore® sampler is used to collect one 5‐gram allotment of soil. The allotment is placed in
methanol‐preserved 40 mL vials. Also, one 5‐gram allotment of soil is placed into sodium bisulfate‐
preserved 40 mL vials (one 5‐gram allotment per vial, 2 vials per sample) for the 8260 low
concentration method. A 250‐mL glass jar of the sampled soil is also collected to provide moisture
content information. Soils sampled for MADEP EPH, EPA Method 8270 and TPH 5030 and 3550 are
placed in a 250‐mL glass jar (for MADEP EPH analysis an amber jar is required). TPH 5030 samples
are preserved in methanol similar to the 8260 analysis. Field personnel wear new, disposable
nitrile gloves during the collection of each sample.
The soil samples are labeled with the sample location, sample identification, date and time of
collection, and the analytical method. The samples are placed on ice, sent to a laboratory, and
analyzed before the expiration of an analytical method’s prescribed holding time. Chain‐of‐custody
documentation is maintained for each sample collected in the field.
If the soil is being sampled for volatile or semi‐volatile compounds, a portion of the collected soil is
placed in a sealable bag and screened for volatile organic vapors. Head screening procedures are
described in the following paragraph.
Headspace Screening
Collected soil samples are routinely tested for the presence of volatile organic compounds (VOCs).
After retrieval from the ground, a portion of a soil sample is placed in a sealable plastic bag. The
soil samples are then set aside for approximately five minutes so that volatile constituents present
in the sample can reach equilibrium concentrations with headspace gases in the bag. Once a
suitable time period has passed, the probe of the sampling instrument, typically an Organic Vapor
Monitor (OVM) or a Photo Ionization Detector (PID), is inserted into the bag and the relative
concentration of total VOCs is measured and permanently recorded in a field note book. VOC
Page 3 of 8
concentrations are measured using either a Thermo Electron Corp. Innova Series catalytic OVM or
an Ion Science PhoCheck PID. Both the OVM and PID instrumentation are periodically calibrated
according to the manufacturer’s recommended procedures.
The OVM and PID are qualitative tools employed to detect and estimate the concentration of
organic or hydrocarbon vapors. A thin probe is inserted through a small break in the seal of a
bagged soil sample. For the OVM, an air sample from the headspace of the bag is drawn through
the probe into an internal chamber where the vapors are catalyzed. The concentration of the VOCs
is registered on a digital scale in parts per million (ppm). For the PID, an air sample from the
headspace of the bag is drawn across the face of a lamp causing the sample to emit photons, the
presence of which are converted into a VOC ppm reading that is displayed. Oxygen levels are field
calibrated prior to each use. VOC calibration occurs periodically depending upon use by using a
span gas of known concentration in a process recommended by the manufacturer.
Well Installation/Construction
Monitoring wells are installed using hand‐operated sampling tools, a truck‐mounted drill rig, or a
Geoprobe drilling rig depending on the depth of well and other site‐specific conditions. All
monitoring wells are installed according to the requirements of 15A NCAC 2C‐Well Construction
Standards. Specifically, individual monitoring wells are constructed of 2‐inch diameter, schedule 40
PVC casing riser and screen. The screen interval is generally 10 to 15 feet of machine slotted PVC
with a slot size of 0.010". Only flush threaded joints are used. The annulus space around the
screen is filled with washed filter pack No. 2 sand. The filter pack extends one to two feet above
the top of the screen. A one to two foot‐thick bentonite pellet seal is then placed above the filter
pack. The remainder of the well annulus is completely filled with a Portland (Type I/II) cement
grout mixture. A protective outer steel manhole, locking cap, and concrete pad is installed for each
well.
Type II Monitoring Well Construction
Single‐cased monitoring wells are generally used in delineation of groundwater quality within the
surficial aquifer. The wells are constructed of 2‐inch diameter, schedule 40 PVC casing and screen.
The screen interval is generally 10 to 15 feet of machine slotted PVC with a slot size of 0.010". Only
flush threaded joints are used. The annulus space around the screen is filled with washed filter
pack No. 2 sand. The filter pack extends one to two feet above the top of the screen. A one to two
foot‐thick bentonite pellet seal is then placed above the filter pack. The remainder of the well
annulus is completely filled with a Portland (Type I/II) cement grout mixture. A protective outer
steel manhole, locking cap, and concrete pad are installed for each well.
Type III Monitoring Well Construction
Double‐cased monitoring wells are used in the delineation of groundwater quality within a deeper
portion of the surficial aquifer or an additional aquifer (e.g. aquitard, bedrock). A four to six‐inch
outer casing is installed through the surficial aquifer until a sufficient depth or until the deeper
Page 4 of 8
aquifer is encountered. The casing is secured with a Portland‐grout collar that is tremmied into the
annular spaced from the bottom of the bore hole to the surface. Once the grout has sufficiently
cured, the bore hole is continued through the bottom of the outer casing to a depth approximately
15 ‐ 20 feet beneath the outer casing. The inner casing is constructed of 2‐inch diameter, schedule
40 PVC casing riser and screen. The screen interval is generally 5 to 10 feet of machine slotted PVC
with a slot size of 0.010". Only flush threaded joints are used. The annulus space around the
screen is filled with washed filter pack No. 2 sand. The filter pack extends one to two feet above
the top of the screen. A one to two foot‐thick bentonite pellet seal is then placed above the filter
pack. The remainder of the well annulus is completely filled with the same Portland grout mixture
used in the outer casing. A protective outer steel manhole, locking cap, and concrete pad are
installed for each well.
Well Development
Following installation of each well, surging and pumping or bailing techniques will be used to
remove fines from the screened interval. Groundwater is removed from each well until clear water
is retrieved or a noticeable reduction in the amount of silt is achieved. Purged groundwater is
disposed of in an environmentally safe manner.
Groundwater Sampling
Petroleum Sites
Groundwater samples are collected from temporary or permanent monitoring wells according to
established sampling protocol. When multiple monitoring wells or sampling points are sampled,
sampling is completed beginning with the least contaminated well to the most contaminated well,
if it is known. When permanent monitoring wells for petroleum sites are sampled, the well is
purged of a minimum of three well‐bore volumes prior to sample collection in order to assure that
sampled water is representative of aquifer conditions. In temporary wells, the first water which
migrates into the open borehole is sampled. Samples from both temporary and permanent
monitoring wells are collected using individually wrapped disposable polyethylene bailers by field
personnel wearing disposable nitrile gloves. Only one well is sampled with a given bailer in order to
prevent sample cross‐contamination. During both well purging and sampling, proper protective
clothing and equipment is used and is dependent upon the type and level of contaminants present.
Also, field personnel change gloves between different samples to reduce the chance of cross‐
contamination. Water samples are transferred from the bailer to laboratory‐prepared sampling
containers using slow emptying devices to reduce the chance of contamination loss through
volatilization. Preservatives, such as acids, are provided by the laboratory in pre‐prepared
containers in which collected samples are placed if in‐field preservation is necessary. The samples
are labeled with the project name, project number, sample identification, required analysis, and
date and time of collection. The samples are placed on ice, shipped to a certified laboratory, and
analyzed before the expiration of an analytical method’s prescribed holding time. Chain‐of‐custody
documentation is maintained for each sample collected in the field.
Page 5 of 8
Other Groundwater Sampling Protocols
When required by state or federal regulations, low‐flow groundwater sampling procedures are
instituted. Groundwater samples collected in low‐flow situations are collected using a peristaltic
pump. A peristaltic pump is a type of positive displacement pump. The fluid is contained within a
flexible tube fitted inside a circular pump casing. A rotor with a number of rollers attached to the
external circumference compresses the flexible tube. As the rotor turns, the part of tube under
compression closes thus forcing the fluid to be pumped to move through the tube. Groundwater
parameters such as water level drawdown, pH, conductivity, dissolved oxygen (DO) and turbidity.
Pumping rate, drawdown, and the time or volume required to obtain stabilization of parameter
readings can be used as a future guide to purge the well. Measurements are collected at a pre‐
pumping established interval (typically five to ten minutes). Once all or a majority of the
parameters have stabilized for three successive readings, stabilization has been achieved. In lieu of
measuring all five parameters, a minimum subset would include pH, conductivity, and turbidity or
DO. Three successive readings should be within ± 0.1 for pH, ± 3% for conductivity, and ± 10% for
turbidity and DO.
Upon parameter stabilization, sampling is initiated. Sampling flow rate is maintained at the estab‐
lished purge rate or is adjusted slightly to minimize aeration, bubble formation, turbulent filling of
sample bottles, or loss of volatiles due to extended residence time in tubing. The same device used
for purging is used to collect the groundwater sample. Generally, volatile parameters are sampled
first. The sequence in which samples for inorganic parameters are collected is not determined
unless filtered (dissolved) samples are collected. Preservatives, such as acids, are provided by the
laboratory in pre‐prepared containers in which collected samples are placed if in‐field preservation
is necessary. The samples are labeled with the project name, project number, sample
identification, required analysis, and date and time of collection. The samples are placed on ice,
shipped to a certified laboratory, and analyzed before the expiration of an analytical method’s
prescribed holding time. Chain‐of‐custody documentation is maintained for each sample collected
in the field.
During both well purging and sampling, proper protective clothing and equipment is used and is
dependent upon the type and level of contaminants present. Also, field personnel change gloves
between different monitoring wells or sampling points to reduce the chance of cross‐
contamination. When multiple monitoring wells or sampling points are sampled, sampling is
completed beginning with the least contaminated well to the most contaminated well, if it is
known.
Stockpile Sampling
The number of composite samples collected from a stockpile or a total quantity of excavated soil is
based upon the cubic yardage. One composite sample is collected for every 100 cubic yards of
contaminated soil excavated. The volume of a stockpile or total quantity of excavated soil is
calculated by approximating the general geometry of a stockpile or estimating the capacity of the
Page 6 of 8
dump trucks used for hauling. If a stockpile is sampled, a grid pattern is laid out on the stockpile,
dividing the stockpile into segments of approximately 200 cubic yards. Two soil borings are
advanced within a grid and three soil samples are collected from each soil boring at various depths.
The six soil samples are mixed into a composite sample by a trained TerraQuest technician. If truck
loads are sampled, an aliquot sample is collected from the hauling trucks at a frequency based
upon the capacity of the hauling trucks.
Aliquots are gently mixed into a composite sample by a trained TerraQuest technician. Every effort
is made to minimize the loss of contaminants through volatilization. The composited soil samples
are jarred in the appropriate laboratory‐prepared containers, labeled with the sample location,
sample identification, date of collection, time of collection, the analytical method, and the
preservative. The samples are placed on ice, shipped to a laboratory, and analyzed before the
expiration of an analytical method’s prescribed holding time. Chain‐of‐custody documentation is
maintained for each sample collected in the field.
Surface Water Sampling
Surface water samples, specifically samples from creeks or streams, are collected from a
moving/flowing portion of the creek or stream to ensure that stagnant water is not collected. Field
personnel are careful to collect samples from flowing areas that are not so turbulent as to cause a
loss of volatile contaminants which might have been contained in the creek’s/stream’s water.
Samples are collected by field personnel wearing disposable nitrile gloves. Field personnel change
gloves between different locations to reduce the chance of cross‐contamination. Samples are
collected directly from the appropriate creek or stream location and placed into the appropriate
laboratory‐prepared containers. Preservatives, such as acids, are provided by the laboratory in pre‐
prepared containers in which collected samples are placed if in‐field preservation is necessary. The
samples are labeled with the project name, project number, sample identification, required
analysis, and date and time of collection. The samples are cooled on ice to approximately four
degrees centigrade, shipped to a certified laboratory, and analyzed before the expiration of an
analytical method’s prescribed holding time. Chain‐of‐custody documentation is maintained for
each sample collected in the field.
Potable Well Sampling
Groundwater samples from potable wells are collected from sampling points, typically spigots,
located in the closest proximity to the potable well pump house as possible. Prior to sample
collection, the water is run for a sufficient amount of time to purge the bladder tank and assure
that sampled water is representative of aquifer conditions. Once purged, the flow rate is reduced
and samples are placed in the appropriate laboratory prepared containers with the appropriate
acid preservatives added if preservation of the sample is necessary. The samples are labeled with
the project name, project number, sample identification, required analysis, and date and time of
collection. The samples are placed on ice, shipped to a laboratory, and analyzed before the
expiration of an analytical method’s prescribed holding time. Chain‐of‐custody documentation is
maintained for each sample collected in the field.
Page 7 of 8
Public Water Supply Line Sampling
Groundwater samples from public water supply lines are collected from sampling points, typically
spigots. To sample the spigot, the flow rate is reduced and samples are placed in the appropriate
laboratory prepared containers. The samples are labeled with the sample location, sample
identification, date of collection, time of collection, and required analytical method. The samples
are placed on ice, shipped to a laboratory, and analyzed before the expiration of an analytical
method’s prescribed holding time. Chain‐of‐custody documentation is maintained for each sample
collected in the field.
Air Sampling
Air samples are collected with the aide of a manually operated MityVac® pump manufactured by
Pristech, Inc. The air sampling process begins by connecting a length of rubber hose from the
MityVac® pump to the port to be sampled, or by hanging the hose inside of an emissions stack in
such a manner as to ensure no outside air causes dilution. Another length of hose is fixed to the
outlet port of the pump and is connected to a new Tedlar bag. Once the pump is hooked up, a
valve on the Tedlar collection bag is opened and air is manually forced into the bag by the pumping
action of sampling personnel.
Field Measurements
Field measurements taken to determine the pH, conductivity, temperature, and dissolved oxygen
concentration of a particular groundwater sample are taken directly after a particular monitoring
well has been adequately purged. This ensures that the groundwater parameter data collected is
representative of the aquifer conditions at a given location. Once purging of the monitoring well is
complete, the decontaminated probe head and cord of the appropriate unit is lowered into the
required monitoring well. If the depth to water in a specific monitoring well is greater than the
length of cord for a particular unit, a new, disposable bailer is slowly lowered into the appropriate
monitoring well and a representative groundwater sample is retrieved. A slow pouring device is
fitted onto the end of the disposable bailer and the sample is slowly poured into a new, disposable
plastic cup. Groundwater parameter data are then collected from the groundwater in the cup
using the required unit.
For pH, conductivity, and temperature, a Hanna Instruments Model 991300 portable meter is
utilized. This unit is periodically calibrated and maintained in accordance with the unit’s operations
manual by field personnel. Prior to data collection, the unit is properly decontaminated to prevent
cross‐contamination. The unit is decontaminated between each sample. The procedure used for
sample measurement involves lowering the meter’s probe into the new, disposable cup containing
the groundwater sample to be measured and slowly stirring the probe to force groundwater across
the probe’s membrane. The measurements displayed by the meter are then recorded.
For dissolved oxygen concentration measurements, a YSI® Model 55 Handheld Dissolved Oxygen
System is utilized. This unit is periodically calibrated and maintained in accordance with the unit’s
Page 8 of 8
operations manual by field personnel. Prior to data collection, the unit is properly decontaminated
to prevent cross‐contamination. The unit is decontaminated between each sample. The procedure
used for sample measurement involves adjusting the unit for the correct altitude where the
sampling will take place and adjusting the reported units desired. Once this is done, the unit’s
probe is inserted into the groundwater sample to be measured and the probe is slowly stirred to
force the groundwater across the probe’s membrane. The measurements displayed by the unit are
then recorded.
For turbidity measurements, a Hach 2100P Portable Turbidity meter or equal equivalent is utilized.
The unit is calibrated prior to use in accordance with the unit’s operations manual by field
personnel. Groundwater samples are collected in glass containers for measurement by the
instrument. The glass containers are washed with bottled‐water between each measurement
collection. Once the sample is collected and inserted into the instrument, the measurements
displayed by the instrument are then recorded.
APPENDIX B
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 1 of 17
Chronological Site History for POCO Shop #1
Responsible Party: Parnell Oil Company, Inc.
Release address: 97 N. Fayetteville Street
Parkton, Robeson County, North Carolina
Incident No. 29796
December 27, 1962 Parnell Oil Company, Inc. purchased the property.
September 26, 1988 USTS (T1 – T3) are installed.
November 1, 2012 Geological Resources, Inc. completed at Phase II Environmental Site
Assessment. A 24-hr report form was filed with the NCDWM.
January 7, 2013 Terraquest completed a site check/ Phase I LSA by advancing sixteen
soil borings and installing one type II monitoring well (MW1).
January 10, 2013 Terraquest sampled monitoring well MW1. Analytical results reveal
contamination above GCLs.
February 12, 2013 Terraquest submitted Site Check Report.
March 13, 2013 Terraquest installed groundwater monitoring wells MW2 – MW4 as
part of Phase II LSA activities.
March 14, 2013 Terraquest collected groundwater samples from MW2 – MW4.
April 27, 2013 Terraquest submitted Limited Site Assessment Report (Phase II).
May 23, 2013 NORR is issued requesting CSA.
October 22, 2013 Terraquest installed temporary monitoring wells (TMW5 – TMW8) on
McMillian property.
October 22, 2013 POCO Shop #1 facility is sold to RSAP of Raeford, LLC.
October 24, 2013 Terraquest attempted to collect groundwater samples from temporary
wells. Well were found to be dry. Water levels fell over 5 feet across
site.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 2 of 17
October 25, 2013 Terraquest collected groundwater samples from temporary well
locations using SP-16 groundwater collection method. Temporary
wells were abandoned.
November 11-13, 2013 Terraquest supervised the installation of 3 type II wells and 1 type III
well. Fourteen soil borings were advanced. Groundwater samples
were collected from MW1-4 and MW9-12.
January 8, 2014 Terraquest submitted a Comprehensive Site Assessment Report. That
report discussed efforts to fully delineate the extent of soil and
groundwater contamination and define specific aquifer characteristics
that influence the movement of contaminants.
August 19 & 22, 2014 Terraquest supervised the installation of 4 type II wells (MW13 –
MW16) on the adjacent property owned by Family Dollar.
Groundwater samples were collected from these wells on August 22,
2014.
March 9 & 10, 2015 Terraquest supervised the installation of 4 type II wells (MW17 –
MW20) in the Town of Parkton’s right-of-way.
March 17, 2015 Terraquest collected groundwater samples from monitoring wells
MW1 – MW14, and MW17 – MW20.
July 1, 2015 Terraquest emailed the Incident Manager, Ken Currie and stated some
rough ideas for corrective action. Informed Mr. Currie that pump and
treat viability will be based on acceptance of treated water by town’s
POTW.
July 22, 2015 Terraquest emails the POTW to ascertain if treated water would be
accepted.
August 3, 2015 Tim Little of the Parkton POTW emailed with Terraquest. They are
generally open to accepting the treated water.
Terraquest emailed the Incident Manager Ken Currie and let him know
the Town was tentatively accepting of treated water. Terraquest
acknowledged that Trust Fund was likely not in favor of this method
due to its aggressiveness. However, the RP’s goal was to protect
human health and the environment.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 3 of 17
The Incident Manager Ken Currie emailed back to acknowledge his
concern over this highly contaminated site and his agreement to
cleanup the onsite contamination and reduce that which is traveling
offsite.
August 6, 2015 The Incident Manager Ken Currie emailed to say that he and the
Regional Supervisor, Wayne Randolph agreed that a CAP was needed
to remediate this site. They were especially concerned with the
presence of contamination in a deeper monitoring well due to the
proximity of the city well.
August 28, 2015 Terraquest sent the NCDWM-UST an ePATA for CAP pilot testing and
system design work. The ePATA was tailored based on previous
correspondences with the NCDWM-UST.
September 11, 2015 Upon receipt of the ePATA, Scott Ryals responded to the CAB Incident
Manager his displeasure that the RP and consultant have ruled out
tank and source removal as a remedial approach. Mr. Ryals felt that
removal of the tanks and a $200,000 soil excavation with an
interceptor trench along the road was an idea that needed
consideration. Mr. Ryals was upset that pilot testing for air sparging
and SVE were proposed as they were old, standard way of doing things
and there was not sufficient space for such a system onsite.
(Note that the RP does not own the tanks and cannot dictate their
removal. This method is not possible as stated by the RP and
Terraquest. There is sufficient space onsite for a treatment system)
Approval was denied.
October 15, 2015 Terraquest emailed the Incident Manager Ken Currie a summary
document of thoughts on corrective action progression. An attempt
was made to lay out possible avenues so that he and Trust Fund could
see what Terraquest and the RP’s plans were to ensure it’s something
that both Ken and Trust Fund would be on board with. It was stated
that “Obviously, we haven’t completed the CAP so there are things
that have not been fully evaluated, however, we need everyone to
agree that it’s an acceptable path to head down so that we aren’t
wasting time and money.”
The Incident Manager Ken Currie emailed back saying he was in favor
of this summary plan and would forward it to Scott Ryals.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 4 of 17
October 28, 2015 Scott Ryals responds to Terraquest’s CAP ideas by stating that a
traditional CAP via MNA, excavation, AS/SVE has been ruled out and
the only option is an oxygen system placed directly in the wells.
The Incident Manager Ken Currie emailed back that due to the risk of
this site, some sort of pilot testing would be required to validate Scott
Ryal’s proposed oxygen system. Ken stated his concerns that the cost
of an oxygen system that will work on all portion of the plume,
including the deeper aquifer, may exceed that of a more traditional
approach.
Throughout the holiday’s, Terraquest further researched various remedial methods that would
be acceptable to Scott Ryals at Trust Fund.
January 5, 2016 Terraquest emailed an ePATA that requested approval of costs
associated with CAP development using Scott Ryal’s method of oxygen
diffusion and also includes in-well bubbling of the deeper wells.
January 6, 2016 The Incident Manager Ken Currie emailed Terraquest back and
recommended the installation of an additional Type III deep well to
ensure that progress forward on the Ryals’ oxygen diffusion CAP was
done with sufficient data.
January 20, 2016 Scott Ryals does not approve the ePATA but emails questions about
the method of pilot testing.
The Incident Manager Ken Currie emailed back explaining the ePATA
and thinking behind the remedial approach.
The oxygen system CAP ePATA was not approved by Scott Ryals.
March 4, 2016 Terraquest emailed an ePATA that requested approval of a
groundwater sampling event.
The Incident Manager Ken Currie emailed back and requested that a
water supply well be added to the sampling event.
Terraquest added Mr. Currie’s recommendation and sent back.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 5 of 17
~March 21, 2016 The RP, Dave Parnell, sent a letter to the NCDWM-UST requesting that
they allow forward progress of corrective action at this release
incident.
No response was received.
April 25, 2016 Terraquest collected groundwater samples from monitoring wells
MW1 – MW4 and MW9 – MW20. Samples were also collected from
Parkton’s municipal well (Well #1) and potable well PW3.
May 26, 2016 Terraquest personnel resampled monitoring well MW12 to verify an
accidently switch of MW12 and MW16 results for the April 25, 2016
event.
June 9, 2016 Terraquest emailed the Incident Manager Ken Currie a graph showing
an increase in deep aquifer contamination. The Groundwater
Monitoring Report was sent via USPS.
June 9, 2016 The Incident Manager Ken Currie emailed Terraquest to state that
based on new CAP procedures the NCDWM-UST was required to have
a summit meeting. Mr. Currie expressed his concern with deeper
aquifer contamination.
July 13, 2016 The Incident Manager Ken Currie emailed to say that he and the
Regional Supervisor, Wayne Randolph had met to discuss how to move
forward with corrective action at this site. They felt that the
installation of another Type III well would provide better information
on vertical contaminant migration.
July 29, 2016 The NCDWM-UST issues an acknowledgement of report receipt
correspondence. The correspondence requests the installation of an
additional Type III well.
August 5, 2016 Terraquest established Vereit, Inc. manages the the Family Dollar
property in Parkton, NC. An attempt was made to contact Audrey
Verde, the property manager.
August 11, 2016 Terraquest makes contact with Audrey Verde by telephone. She
requests a brief summary of the project and what work is planned for
the Family Dollar property. Terraquest sends Ms. Verde a brief
summary, access agreement, and drawings.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 6 of 17
August 11, 2016 Terraquest and the RP are denied offsite access to the Family Dollar
property without payment for the purpose of drilling the requested
Type III well. Trust Fund would not pay for access. Their legal
department made liability requests that Terraquest was unable to
acquiesce to.
August 16, 2016 Tambre Rudd of Vereit, Inc. legal department sends Terraquest draft
access contract and request for $750 for completing the contract.
September 2016 Terraquest corresponds with their own counsel, the RP, the offsite
property owner (Family Dollar), and the Incident Manager, Ken Currie
regarding the Type III well. Ultimately, Trust Fund would not pay the
$750 access fee and Terraquest’s attorney recommended that they
not agree to the liability demands of Family Dollar’s legal document.
September 7, 2016 Terraquest personnel sampled monitoring wells MW1-4, MW9-14, and
water supply wells PW3 and the Town of Parkton’s Well #1. The
samples were analyzed without dilution for Method 6200B. This
caused results for several compounds to be well over calibration
range, and also caused carryover for some of the samples. The
analyses were not reportable due to a Continuing Calibration
Verification failure. The samples required resampling.
September 20, 2019 Terraquest contacts NCDOT to see if installing the well within the
David Parnell St right-of-way is an option. Charles Miller of the NCDOT
does not like the idea of having a permanent well at this location.
Terraquest alters the plan of work and requests right-of-way access to
complete temporary boring with groundwater sampling (SP-16
sampling).
September 29, 2016 Following denial of offsite access, Terraquest conversed with the
NCDOT and received approval to drill a temporary well in the road
between the site and the Family Dollar where access is denied. This
was emailed to Ken Currie.
September 30, 2016 The Incident Manager Ken Currie emailed to say that he agreed with
the temporary well idea. He requests a change order ePATA for the
SP-16 footage and removal of the Type III costs
October 19, 2016 Scott Ryals denies the ePATA for the NCDEQ-required well permit and
an NCDOT-required access agreement.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 7 of 17
When told that these items were required, Mr. Ryals requests contact
information for the NCDOT.
October 19, 2016 Terraquest personnel sampled monitoring wells MW1-4, MW9-14, and
water supply wells PW3 and the Town of Parkton’s Well #1.
November 2, 2016 Scott Ryals states that he has not heard back from the NCDOT
regarding the requirement for an access agreement for temporary well
installation.
November 4, 2016 Terraquest emailed Vance Jackson and Scott Ryals. The email detailed
the risk of the release incident and efforts to move forward.
Teraquest stated that while drilling costs for a temporary well have
been approved the denial of the NCDOT-required agreement prevents
this work from happening.
Scott Ryals sends an email rescinding all approval for the temporary
well. Mr. Ryals then calls Terraquest, is informed of the situation. He
agrees in principal to the work during the phone call. He subsequently
approves a new ePATA with an old ePATA number. This cancels the
original work and only approves the NCDOT agreement.
November 8, 2016 Scott Bullock, the head of the Corrective Action branch, states that he
does not believe there is a need for a temporary well in the NCDOT
right of way. He recommends installing a Type III well on the Post
Office property over 225 feet downgradient.
Subsequent conversation with the NCDWM-UST indicate that 225 feet downgradient is likely
too far away to show vertical migration of the onsite plume. Several other areas are
investigated as potential Type III well locations with a good spot never identified.
December 16, 2016 Terraquest emailed the Incident Manager Ken Currie and discussed
several offsite drill locations for a Type III well pointing out the issues
in a suitable location.
Terraquest notes that pilot testing is required for corrective action.
December 20, 2016 The Incident Manager, Ken Currie emailed to say that ePATAs are on
hold pending the new task code rates.
January 27, 2017 Terraquest emailed the Incident Manager, Ken Currie to discuss the
path forward. Discussion of how to deal with soil and groundwater
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 8 of 17
was provided along with a question as to how to proceed under the
new 3-step CAP process.
February 16, 2017 Following staff training, the Incident Manager, Ken Currie emailed
Terraquest with a path forward toward corrective action. This
included a decision on Type III wells and then a decision on a
treatment system that can do cleanup in 2-3 years. After that the
ideas would be presented to Scott Ryals at Trust Fund.
Terraquest and Ken Currie emailed to determine the location of Type
III wells. Terraquest subsequently sent in an ePATA for those two
wells.
February 28, 2017 The Incident Manager, Ken Currie emailed to say that Scott Ryals had
concerns about why we were trying to delineate the deep aquifer with
only two onsite wells. Mr. Currie explained to Mr. Ryals that the goal
was not delineation but to learn what is migrating offsite. Mr. Currie
emphasized the importance of getting started with corrective action.
March 2, 2017 The Incident Manager, Ken Currie emailed to say that he and Wayne
Randolph agreed that the site needs aggressive cleanup. He stated
that while it would be nice to have another Type III well, the location
of one over 400 feet away where access might be available was not
really a priority.
Scott Ryals of Trust Fund had not approved the onsite Type III wells.
March 17, 2017 Terraquest personnel sampled monitoring wells MW1-4, MW9-20, and
water supply wells PW3 and the Town of Parkton’s Well #1.
August 8, 2017 The NCDWM-UST held an internal meeting to discuss the forward path
for this release incident. Neither Terraquest nor the RP were invited
nor present at that meeting.
Scott Ryals notes during the meeting that further investigation needs
to be made into whether or not the current system is leaking.
(VOC analyses from this point on have 5 oxygenates added to the
analyte list – a new release is not indicated)
The outcome of the meeting made known to Terraquest was to
proceed with SVE and air sparge pilot testing.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 9 of 17
August 21, 2017 Terraquest receives approval for SVE and air sparge pilot testing.
October 3, 2017 Terraquest installed pilot test and monitoring wells and sampled select
wells.
October 9-10, 2017 Terraquest conducted SVE and air sparge pilot tests.
November The pilot test results were provided to the NCDWM-UST.
January 2018 Questions and concerns regarding the pilot testing were presented to
Terraquest in emails.
March 21, 2018 Terraquest submitted an SVE and Air Sparge Pilot Test Supplemental
Report.
April 13, 2018 The NCDWM-UST issued an NORR requesting the completion of
Corrective Action Design.
April 17, 2018 John Haselow requests pre-approval of a Corrective Action Design
Report as 6.066
April 29, 2018 Pre-approval is granted by the NCDWM-UST via 29796-017 for
completion of a Corrective Action Design Report as 6.066.
May 16, 2018 Terraquest collected groundwater samples from monitoring wells
MW1-4, 9-14, 16, 19, and 20.
July 31, 2018 Terraquest spoke with Mr. Tim Little (910) 474-6616 who is the
director of Public Works for the Town of Parkton. Mr. Little confirmed
that power is supplied to the site by Duke Energy Progress. Called
Duke Energy Progress and requested they inform of what power is
available at the site.
July 31, 2018 Terraquest spoke with Jackie Easton who is the clerk for Robeson
County at (910) 272-6525. Ms. Easton advised that zoning was
handled by the Town of Parkton and building inspections were
handled by Robeson County. Inspections can be reached at (910) 272-
6540. Inspectors are usually in the field from 10 until 3:30PM.
August 2, 2018 Kristin Parker with Duke Energy Progress called to say that she would
go by site soon to inspect and advise as to what power is available.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 10 of 17
August 9, 2018 Kristin Parker with Duke Energy Progress visited the site and said that
power can drop to us from either street. Three phase power is
available at most common voltages we would want and delta/wye
configuration is also available.
August 14, 2018 Terraquest called Kristin Parker with Duke Energy Progress to
determine her availability to meet onsite and further discuss power
utility.
August 15, 2018 Kristin Parker with Duke Energy Progress confirmed that Monday,
August 20, 2018 she was able to meet onsite.
August 15, 2018 Terraquest contacted Richard Cummings with Robeson County Building
Inspections and the responsible party to schedule an onsite meeting
for Monday, August 20, 2018. The RP also contacted the property
owner and store operator.
August 20, 2018 Terraquest met onsite with property owner (Roger Shaw), store
operator (Amit Patel), and Kristin Parker from Duke Energy Progress.
Discussed location of treatment system.
August 20, 2018 Terraquest spoke with Robeson County Building Inspector Richard
Cummings. Mr. Cummings differed building construction regarding
fire concerns to the Fire Marshal. He also stated that property
setbacks are established by the Town of Parkton.
August 20, 2018 Terraquest spoke with Dwight Shepard (910) 813-9729 who is the local
Fire Marshal. He said treatment system enclosure should be either
cinder block or metal. Can’t be anything combustible.
August 22, 2018 Terraquest spoke with Wanda Dockery (910) 858-3360 yesterday
concerning the Town of Parkton’s zoning rules regarding property
setbacks. She said she would check with someone and get back in
touch.
August 23, 2018 Wanda Dockery with the Town of Parkton called today and put the
mayor (Al McMillan) on the phone. Explained to him where exactly we
were trying to put our remedial boxes on the POCO #1 property. He
said that since they didn’t have any property setbacks, he would say to
use 6 feet as a limit. He will send us a letter stating as such.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 11 of 17
September 19, 2018 John S. Haselow, Ph.D., P.E. sends equipment and installation bid
specifications to Scott Ryals for review.
October 24, 2018 Scott Ryals authorizes the bid specifications.
November 6, 2018 Bid specifications are sent to vendors to solicit quotes.
February 14, 2019 John S. Haselow, Ph.D., P.E. submits a Corrective Action Design Report
to the NCDWM-UST.
February 26, 2019 The Incident Manager Ken Currie emailed to say that he had received
the CADR.
April 8, 2019 Terraquest provides the NCDWM-UST with evidence of public
notification of the CADR.
April 15, 2019 Following public notification of the CADR, the NCDWM-UST approves
the CADR.
June 19, 2019 Terraquest submitted a Record of Decision and Groundwater Modeling
Report.
July 26, 2019 Terraquest asks the Incident Manager for the status of the ROD who
replies that it is under review by Scott Ryals.
August 2, 2019 Scott Ryals tells Ken Currie that the report has been on his desk for 10
days but he has not had time to look at it.
August 7, 2019 Scott Ryals emails Ken Currie and Terraquest to say that two RODs will
be required for this one site and that the AS/SVE should be moved
forward so it can be installed. He requests data from the previously
submitted bid specifications be included in the ROD.
(A ROD for offsite natural attenuation is not required as it is not active
remediation. Furthermore, there is only one release incident and it
should not be treated as two. The purpose of the ROD is for the
agreed-upon corrective action to be written down and agreed to in
one place. Not in two dissimilar documents.)
August 7, 2019 In light of Scott Ryals’ 8/7/19 email, Terraquest asked the Trust Fund
Branch Head, Bill Hunneke, if Terraquest could get paid for work
already completed including the ROD and groundwater model.
Terraquest’s work was submitted to the NCDWM-UST
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 12 of 17
Bill Hunneke emailed back and said “Yes, go ahead and turn in
reimbursement for work already completed.”
August 19, 2019 The Incident Manager, Ken Currie, emailed with Terraquest to clarify
what needed to be in the revised ROD. Ken stated that Bill Hunneke
said: “you can go ahead and invoice for the ROD”.
August 19, 2019 Terraquest resubmits the ROD with requested information from the
bid specification included.
August 20, 2019 The Incident Manager, Ken Currie, emailed the ROD to Scott Ryals for
his review.
September 4, 2019 Terraquest spoke with the Incident Manager, Ken Currie. He said the
update done to the ROD has everything satisfied and it should be
ready to sign.
Terraquest emailed the Trust Fund Branch Head, Bill Hunneke, to let
him know that the ROD was ready to sign. Asked for guidance on the
next step.
September 6, 2019 The Trust Fund Branch Head, Bill Hunneke, emailed Terraquest and
said that the ROD was on Scott Ryals’ desk and he would get to it early
next week.
September 10, 2019 The Incident Manager, Ken Currie, and Scott Ryals of Trust Fund,
discussed who is signing the ROD and how things are to move forward.
A request for a groundwater sampling event was emailed to
Terraquest.
Terraquest sent in an ePATA for a groundwater sampling event.
September 11, 2019 The NCDWM-UST grants pre-approval of costs for a groundwater
sampling event.
October 7, 2019 Terraquest emails the Trust Fund to ask about the status of payment
for the ROD and groundwater model.
October 9, 2019 Trust Fund states that the ROD is still being reviewed by Scott Ryals.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 13 of 17
October 17, 2019 Terraquest sends the Trust Fund Branch Head, Bill Hunneke, a
completed signature page for the ROD.
October 24, 2019 The Trust Fund Branch Head, Bill Hunneke, says he hasn’t forgotten
about the ROD.
November 1, 2019 Terraquest corresponds with the Trust Fund Branch Head, Bill
Hunneke to say that the ROD still isn’t signed by them and that
payment has not been made.
November 6, 2019 The NC Leaking UST Trust Fund issues correspondence regarding he
reimbursement request for the submitted groundwater model and
ROD. Funding for the ROD is denied. The correspondence states that
“The record of decision for this task has not been determined,
therefore not reimbursable at this time.”
November 8, 2019 Terraquest corresponds with the Trust Fund Branch Head, Bill
Hunneke to say that the ROD still isn’t signed by them and that
payment has not been made.
December 11, 2019 The RP, Dave Parnell, Terraquest, and regulators of the NCDWM-UST
including Michael Scott, Vance Jackson, Scott Bullock, Bill Hunneke,
Scott Ryals, Wayne Randolph, and Ken Currie met to discuss the ROD
and a path forward. An unsigned letter on blank paper that was dated
September 11, 2018 was provided to the RP and Terraquest for the
first time. The letter was a review of the ROD with requests for
revisions. All parties sorted through the document to agree on details
to finalize the ROD. The NCDWM-UST agreed to pay for additional
work on the ROD and granted payment toward the meeting. The
primary request was for an updated groundwater sampling event to
ensure that there was not a current release happening.
December 12, 2019 Terraquest personnel sampled groundwater monitoring wells MW1-4,
MW9-14, MW16-20, and MWB and MWC. All samples were submitted
to an NC-certified lab for analysis per 6200B for VOCs and five
oxygenates were also targeted.
December 31, 2019 Terraquest sent a Monitoring Report to the NCDWM-UST detailing the
December 12, 2019 groundwater sampling event. The report
confirmed that there was no obvious signs of a new release occurring.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 14 of 17
January 9, 2020 Terraquest sent an email to Scott Ryals of the NCDWM-UST. In
working on the ROD, a discrepancy was found between what was
asked as a correction and what the ROD template had laid out.
January 14, 2020 Scott Ryals confirmed that he had received the January 9, 2019 email
and requested a copy of the ROD template. Terraquest provided that
via return email.
In a subsequent email, Scott Ryals emailed a new version of the ROD
template with different wording on the signature page. That wording
was incorporated into Version 3.0 of the ROD.
Terraquest sent the ROD Version 3.0 to the NCDWM-UST (paper copy).
January 22, 2020 Terraquest emailed a copy of the ROD to Scott Ryals.
January 24, 2020 The NCDWM-UST MRO confirmed receipt of the ROD V3.0.
February 5, 2020 Terraquest asked Scott Ryals if he has completed review of the ROD.
February 11, 2020 Terraquest again asked Scott Ryals if he has completed review of the
ROD. Mr. Ryals stated that he has sent his comments off for
managerial review.
February 19, 2020 The NCDWM-UST sent another round of questions and change
requests for the ROD.
March 11, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD.
March 13, 2020 Bill Hunneke informed Terraquest that Vance Jackson would send
Terraquest a letter next week due to vacation time.
March 23, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD. Bill
said Vance is swamped
April 2, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD.
April 6, 2020 Terraquest spoke to Bill about the status of the ROD and he was going
to ask Vance. Terraquest noted that we were holding trust fund
package and cannot get paid.
April 9, 2020 Terraquest contacted Bill Hunneke and Vance Jackson regarding
review of the ROD.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 15 of 17
April 16, 2020 Terraquest contacted Bill Hunneke regarding review of the ROD.
April 20, 2020 Terraquest spoke to Vance and Bill about the ROD. Vance was going to
get a letter out on 4/21/20.
April 22, 2020 Terraquest emailed Vance and Bill about ROD letter.
April 2020 Vance Jackson responded with comments about the ROD.
April 30, 2020 Terraquest asked Bill some questions about the comments on the ROD
while preparing the answers to other questions.
June 26, 2020 Terraquest resubmitted with update model results for cleanup levels.
July 29, 2020 Asked Vance about status in voicemail.
August 11, 2020 Terraquest sent another email to Vance
August 17, 2020 Terraquest communicated more with Dave Parnell and Ken Currie.
August 20, 2020 Terraquest emailed Dave Parnell again.
August 28, 2020 Vance emailed Terraquest to say ROD was ready.
August 31, 2020 Terraquest called Vance and he said ROD was ready, just waiting on
Scott Ryals to write letter then they can see about meeting and
signatures.
September 9, 2020 Terraquest emailed Scott about status of letter for ROD.
September 10, 2020 Scott emailed Terraquest back and said he would need to discuss with
Vance. Terraquest told Scott in prior email that Vance said it was good
to go. Terraquest called Dave Parnell with this info.
September 18, 2020 Vance told Terraquest to go ahead and print and sign final ROD page.
He was discussing an issue about remediation with Scott regarding
fluctuations in groundwater and STG MSCCs.
October 22, 2020 All parties sign an Amendment Memo to the ROD. The Memo allows
for the installation and operation of the treatment system followed by
an evaluation of cleanup levels following operation. The Memo also
allows for the installation of two downgradient monitoring wells.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 16 of 17
October 23, 2020 All parties meet via online conference to approve the ROD.
The NCDWM-UST requests the completion of a groundwater
monitoring event.
January 7, 2021 Roy Lowder of the Town of Parkton Public Works grants offsite access
for the purpose of installing groundwater monitoring wells of the ROD
Memo.
February 15, 2021 Terraquest updates the NOI WI0600188 with the NCDEQ DWR UIC. As
part of the approved Record of Decision for POCO #1, Terraquest is
scheduled to drill six additional air sparge wells in March 2021.
Terraquest requests a well construction permit for the offsite Type III
wells.
February 18, 2021 The NCDEQ-DWR grants well construction permit WM0601170.
February 26, 2021 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14,
MW16-20, MWB, and MWC and Town water supply well WSW1.
March 8-9, 2021 Terraquest supervised the installation of monitoring wells MW21 and
MW22, soil vapor extraction wells SVE2-10, and air sparge wells AS1-6.
August 3, 2021 The air sparge and remediation system was started. Air sparge was
only run for a few minutes to observe flows and collect an exhaust
sample. SVE was turned on and allowed to continue operation
throughout the quarter.
October 13, 2021 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14,
MW16-22, MWB, and MWC. Town water supply well WSW1 was
down for repairs and was not sampled. Terraquest was informed
during a 10/21/21 telephone discussion with the Public Works Director
Roy Lowder, that a new valve needs to be replaced for the well and
then it will be back up and running.
October 21, 2021 Terraquest was informed during a telephone discussion with the Public
Works Director Roy Lowder, that a new valve needs to be replaced for
the town water supply well WSW1 and then it will be back up and
running.
Terraquest Environmental Consultants, P.C.
100 E Ruffin St, Mebane, NC 27302
(919) 563-9091
Page 17 of 17
December 20, 2021 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14,
MW16-22, MWB, and MWC. Town water supply well WSW1 had been
fixed and was sampled also.
March 15, 2022 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14,
MW16-22, MWB, and MWC, and Town water supply well WSW1.
June 2, 2022 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14,
MW16-22, MWB, and MWC, and Town water supply well WSW1.
December 28, 2022 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14,
MW16-22, MWB, and MWC. Town water supply well WSW1 was
down for repairs and could not be sampled.
June 28, 2023 Terraquest sampled groundwater monitoring wells MW1-4, MW9-14,
MW16, MW17, MW18, MW21, MW22, MWB, and MWC. Town water
supply well WSW1 was down for repairs and could not be sampled.
APPENDIX C
Well IDMW1 6.86 92.47 12.15 87.18 5.25 94.08 7.59 91.74 9.46 89.87 5.19 94.14 7.78 91.55 12.00 87.33 9.27 90.06MW26.23 92.64 11.61 87.26 4.66 94.21 7.00 91.87 8.93 89.94 4.64 94.23 7.19 91.68 11.45 87.42 8.70 90.17
MW3 6.49 92.38 11.73 87.14 5.13 93.74 7.20 91.67 9.06 89.81 4.76 94.11 7.38 91.49 11.58 87.29 8.85 90.02MW47.44 91.88 11.48 87.84 5.13 94.19 5.28 94.04 9.52 89.80 4.53 94.79 7.43 91.89 11.05 88.27 8.29 91.03
MW9 --11.42 87.3 4.43 94.29 6.80 91.92 8.83 89.89 4.58 94.14 7.10 91.62 11.35 87.37 8.60 90.12MW10--11.53 87.03 4.57 93.99 6.74 91.82 8.77 89.79 4.49 94.07 7.05 91.51 11.27 87.29 8.55 90.01
MW11 --12.12 87.18 5.25 94.05 7.55 91.75 9.33 89.97 5.15 94.15 7.73 91.57 12.00 87.3 9.23 90.07MW12--12.74 86.8 5.76 93.78 7.82 91.72 10.00 89.54 5.50 94.04 8.03 91.51 12.35 87.19 9.59 89.95MW13----5.06 93.96 7.00 92.02 9.22 89.8 5.10 93.92 7.60 91.42 11.85 87.17 9.08 89.94MW14----5.61 93.89 7.96 91.54 9.75 89.75 5.61 93.89 8.11 91.39 12.38 87.12 9.59 89.91MW15----6.05 93.58 8.20 91.43 ----8.28 91.35 ----
MW16 ----4.39 94.25 6.64 92 ----7.08 91.56 --8.59 90.05MW17----3.94 93.76 6.29 91.41 ----6.34 91.36 ----
MW18 ----3.24 93.62 5.57 91.29 ----5.64 91.22 ----MW19 ----2.71 92.96 5.05 90.62 ----5.04 90.63 --6.70 88.97MW20----3.45 93.04 5.78 90.71 ----5.78 90.71 10.35 86.14 7.47 89.02Type II ave:6.76 11.72 4.59 6.71 9.21 4.89 7.04 11.66 8.58Well IDMW1 9.05 90.28 10.33 89.00 4.62 94.71 11.01 88.32 11.49 87.84 6.54 92.79 11.24 88.09 9.63 89.70 7.45 91.88MW2--9.77 89.10 4.1 94.77 12.59 86.28 12.49 86.38 7.55 91.32 10.7 88.17 9.52 89.35 --
MW3 8.7 90.17 9.92 88.95 4.21 94.66 11.94 86.93 12.4 86.47 7.88 90.99 10.78 88.09 9.9 88.97 7.27 91.6MW4--9.96 89.36 3.45 95.87 10.60 88.72 12.76 86.56 6.73 92.59 9.12 90.20 9.17 90.15 7.03 92.29
MW9 8.42 90.3 9.60 89.12 3.63 95.09 11.45 87.27 12.43 86.29 7.09 91.63 10.4 88.32 9.24 89.48 6.93 91.79MW108.35 90.21 9.60 88.96 3.89 94.67 11.64 86.92 11.04 87.52 7.74 90.82 10.55 88.01 9.79 88.77 7 91.56MW11--10.25 89.05 4.58 94.72 12.28 87.02 13 86.3 7.9 91.4 11.3 88 9.89 89.41 7.54 91.76MW12--10.68 88.86 5.15 94.39 13.57 85.97 --8.69 90.85 11.58 87.96 10.3 89.24 8.02 91.52MW13--10.03 88.99 3.38 95.64 12.11 86.91 12.4 86.62 7.79 91.23 11.11 87.91 9.97 89.05 7.47 91.55
MW14 --10.56 88.94 4.95 94.55 12.67 86.83 13.09 86.41 8.25 91.25 11.64 87.86 10.3 89.2 8 91.5MW16--9.57 89.07 3.36 95.28 11.98 86.66 11.99 86.65 7.26 91.38 10.89 87.75 9.12 89.52 6.84 91.8
MW17 --8.71 88.99 3.5 94.2 14.11 83.59 11.11 86.59 6.4 91.3 10.02 87.68 8.15 89.55 6 91.7MW18--8.00 88.86 2.65 94.21 10.41 86.45 10.45 86.41 5.69 91.17 9.41 87.45 7.35 89.51 5.3 91.56
MW19 --7.34 88.33 2.25 93.42 9.73 85.94 9.78 85.89 5.09 90.58 8.86 86.81 6.21 89.46 --MW20 --7.80 88.69 1.75 94.74 10.60 85.89 10.8 85.69 5.45 91.04 9.68 86.81 7.72 88.77 --MW21 ------10.91 76.67 11.33 76.25 6.59 80.99 10.14 77.44 8.31 79.27 6.75 80.83MW22------7.78 88.96 10.58 86.16 5.49 91.25 7.63 89.11 7.79 88.95 5.3 91.44Type II ave:8.63 9.39 3.59 11.65 11.80 6.95 10.41 9.00 6.98
Max ave:11.72Min ave: 4.59
10/3/2017
Incident Name: POCO Shop #1 Incident No. 29796HISTORICAL GROUNDWATER ELEVATION
3/14/2013 11/13/2013 3/17/2015 4/25/2016 9/7/2016 10/19/2016 3/17/2017 5/16/2018
6/27/2018 12/12/2019 2/26/2021 10/13/2021 12/20/2021 3/15/2022 6/2/2022 12/28/2022 6/28/2023
Page 1 of 3
6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B+oxygenates6200B+oxygenates6200B6200B6200B6200B6200B+oxygenatesMADEPVPHMADEPVPHMADEPVPH504.16010BWell ID Date Collected
Depth to Groundwater (feet)Groundwater Elevation (feet)MW1 1/10/13 8.2 91.13 19,400 35,900 2,680 10,860 5,800 <100 <1,230 301 <<<-<<<<<<<734 <--<1,100 501 <225 <<<---<<<-75,600 <7,000 <7,000 1.1 <5MW13/14/13 6.86 92.47 ------<---<<-<-------<----------------------MW1 11/12/13 11/13: 12.15 87.18 23,100 49,200 70.1 5,824 131 1.49 <48.4 12.2 <<<-<<<0.124 <<0.640 <10.2 <--2.72 <0.0850 5.29 <0.0600 6.80 <0.0920 0.510 <---0.510 <0.0540 0.3 ------MW1 3/17/15 5.25 94.08 17,300 41,000 2,510 20,550 2,780 <4.60 <2,560 746 <18.9 <<-<<17.6 <<<<<472 <--<4.90 <9.50 802 <220 <4.60 <4.45 <3.70 ---<4.45 <2.70 <------MW1 4/25/16 7.59 91.74 10,800 27,500 2,370 12,850 1,800 <46 <1,680 480 <<<-<<<<<<<390 <--<49 235 680 <<32.5 <46 <44.5 <---<<27 <------MW1 10/19/16 5.19 94.14 4,500 10,700 852 4,700 525 7 <644 184 <9.45 <<-<74 <3.1 <3.98 14.5 <2.62 <4.42 150 <--31.2 <249 <1.5 66.8 <2.3 8.5 12.2 ---<2.22 <1.35 <3.48 ------MW1 3/17/17 7.78 91.55 21,400 51,700 3,770 21,100 1,570 32 <2,060 574 <<<-<268 <<<<<<<--324 <964 <222 <<<14.8 ---<<<------MW1 10/3/17 12 87.33 27,200 54,200 3,440 20,400 1,110 <57.5 <1,470 431 <<<<1680 <<220 <<<<<581 <-<1880 81.2 <1,880 <206 <644 <46.2 <1650 <1250 <625 <<<<1250 -----MW1 5/16/18 9.27 90.06 19,800 49,900 3,730 18,090 1,420 < 46.0 <2,290 955 < 140 <<-< 127 350 <<<<<290 <-< 1500 615 <1,830 <755 <725 945 ---<< 27.0 <------MW1 6/27/18 9.05 90.28 18,500 48,700 3,610 18,260 1,420 < 92.0 <2,080 560 < 280 <<<< 253 < 352 <<<<<<160 <-< 3000 < 98.0 << 94.0 << 65.0 << 89.0 1,260 <<<<< 54.0 <<-----MW1 12/12/19 10.33 89 6,390 19,900 1,890 10,750 312 11.2 <0.138 1,640 576 <0.280 <<<2.68 23.1 40.4 <0.124 0.51 1.09 <0.105 0.94 186 <-<3 80.2 <0.190 706 <0.0600 148 7.14 <0.0890 34.9 933 66.5 <1 <0.339 <0.0540 4.13 <2 -----MW1 2/26/21 4.62 94.71 670 2,080 232 1,340 16.7 < 7.00 < 8.40 153 61 < 26.0 << 31.0 < 120 < 18.0 < 100 < 5.00 < 7.10 < 5.00 < 5.00 < 5.00 13.1 <-< 520 6.74 < 30.0 33.2 < 7.60 13.1 < 7.00 < 7.10 < 10.0 137 < 6.00 < 24.0 < 6.30 < 5.80 < 5.00 < 6.80 -----MW1 10/13/21 11.01 88.32 212 750 62.3 322 157 < 1.00 <39.7 11.6 < 13.0 4.23 << 60.0 < 9.00 50.5 << 1.25 <<<3.17 < 1.60 -< 120 < 2.65 <47.7 < 3.80 4.52 < 3.50 < 3.55 <1,800 18.1 < 12.0 <<<< 2.60 < 1.40 -----MW1 12/20/21 11.49 87.84 18.2 31.3 1.8 18.5 54.3 0.42 1.59 6.13 <<<<< 12.0 << 10.0 <<<<<4.7 <-< 24.0 < 0.530 <2.04 < 0.760 < 0.690 <<<620 5.38 < 2.40 <<<<< 0.280 -----MW1 3/15/22 6.54 92.79 1.36 3.42 < 0.500 2.91 19.2 < 0.200 <1.41 0.571 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 <761 < 0.230 < 2.40 <<<<< 0.280 -----MW1 6/2/22 11.24 88.09 1,980 6,380 290 3,050 111 < 10.0 <223 104 <<<<<<<<<<<274 <-<<<<<<<<<<<<<<<<<-----MW1 12/28/22 9.63 89.7 8.86 20.3 1.15 6.2 104 0.411 << 0.820 < 0.560 4.42 < <<<33.2 <<<<<3.25 <<<<<<<<<<<<<<<<<<<-----MW1 6/28/23 7.45 91.88 123 520 20.9 327 18.2 < 1.00 <<2.85 <<<<<90.1 2.75 <<1.12 <83.1 <<<<<<<<<<<211 4.6 <<<<<<-----MW2 3/14/13 6.23 92.64 <0.10 <0.10 <0.10 <0.22 <0.10 <0.10 <<0.10 <0.10 <<<-<<<<<<<<0.10 <--<<1.0 0.22 <<0.10 <<<---<<<-<35 <35 <35 <0.0097 <5MW211/12/13 11/13: 11.61 87.26 <0.119 0.46 <0.0920 0.99 0.35 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <<0.172 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 ------MW2 3/17/15 4.66 94.21 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 1 <------MW2 4/25/16 7 91.87 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 0.84 <<0.0650 <0.0920 <0.0890 <---<1.09 -------MW2 10/19/16 4.64 94.23 <0.119 0.15 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <3.1 <3.98 <0.099 <2.62 <4.42 <0.172 <--<0.0980 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.089 0.29 <0.139 ------MW2 3/17/17 7.19 91.68 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW2 10/3/17 11.45 87.42 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<2.48 <<<<<<0.172 <-<3.00 <0.0980 <<0.0940 <<0.0650 <<0.0890 <0.0740 ---<<<------MW2 5/16/18 8.7 90.17 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 2.19 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<0.5 <------MW2 12/12/19 9.77 89.1 2.54 10.4 1.23 6.3 <0.169 <0.0920 <1.17 <0.0870 < 0.280 <<-< 0.253 <0.139 <<<<<<0.160 <-< 3.00 <0.0980 <0.190 4.16 <0.0600 <0.0650 <0.0920 <0.0890 <0.0740 ---<0.339 <0.0540 <0.160 ------MW2 2/26/21 4.1 94.77 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW2 10/13/21 12.59 86.28 < 0.130 2.14 < 0.500 < 1.60 4.77 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW2 12/20/21 12.49 86.38 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW2 3/15/22 7.55 91.32 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW2 6/2/22 10.7 88.17 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW2 12/28/22 9.52 89.35 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<41.7 <<<<<<<<<<<<<<<<-----MW3 3/14/13 6.49 92.38 15,700 47,400 3,240 16,700 2,870 <100 <1,780 433 <<<-<<<<<<<<100 <--<<1,000 688 <256 <<<---<<<-39,400 <7,000 <7,000 4.4 23.4MW311/12/13 11/13: 11.73 87.14 13,900 44,800 3,190 16,980 109 8.04 <<51.5 59.4 <<<-<<<0.124 <<<0.105 <<0.172 <--10.3 <0.0850 65.5 <0.0600 26.8 1.15 0.860 <---0.860 <0.0540 <0.139 ------MW3 3/17/15 5.13 93.74 13,100 47,200 4,730 23,350 699 38.3 <3,700 632 <3.78 <<-<<3.52 <<<<<<1.72 <--125 <1.90 993 <352 <0.920 25.6 40 ---<0.890 <0.540 <------MW3 4/25/16 7.2 91.67 8,180 31,900 2,950 16,460 500 <46 <2,290 685 <<<-<<<<<<<<86 <--<49 <95 965 <245 <46 <44.5 <---<<27 <------MW3 10/19/16 4.76 94.11 9,420 34,400 2,320 14,600 242 15 <1,920 546 <9.45 <<-<215 <3.1 <3.98 <2.48 <2.62 <4.42 <4.3 <--94.2 <4.75 882 <1.5 212 <2.3 26 30.8 ---<2.22 <1.35 <3.48 ------MW3 3/17/17 7.38 91.49 11,300 48,700 3,650 22,900 1,610 44 <2,520 772 <<<-<1,000 <<<<<<<--588 <1,680 <280 <<<29.6 ---<<<------MW3 10/3/17 11.58 87.29 15,800 49,200 3,300 20,800 <84.5 <46.0 <2,100 530 <<<<1340 <<176 <<<<<<86.0 <-<1500 100 <1,620 <290 <525 <37.0 <1320 <1000 <500 <<<<1000 -----MW3 5/16/18 8.85 90.02 8,710 45,500 3,120 17,620 < 84.5 < 46.0 <2,510 1,040 < 140 <<-< 127 < 176 <<<<<< 80.0 <-< 1500 600 <1,840 <700 << 44.5 < 37.0 ---<< 27.0 <------MW3 6/27/18 8.7 90.17 7,690 41,500 3,030 17,630 < 169 < 92.0 <2,270 650 < 280 <<<< 253 < 352 <<<<<< 160 <-< 3000 < 98.0 << 94.0 << 65.0 << 89.0 < 74.0 <<<<< 54.0 <<-----MW3 12/12/19 9.92 88.95 7,260 32,300 2,700 15,740 65.5 12.1 <2,420 555 <<<<<<0.352 <<<<<<<-<94.7 <782 <261 10.4 6.23 32.5 2,290 45.3 <<<<<-----MW3 2/26/21 4.21 94.66 3,490 18,200 1,440 7,450 < 148 < 140 < 168 941 258 < 520 << 620 < 2400 < 360 < 2000 < 100 < 142 < 100 < 100 < 100 < 120 <-< 10400 < 106 < 600 479 < 152 < 138 < 140 < 142 < 200 1,120 < 120 < 480 < 126 < 116 < 100 < 136 -----MW3 10/13/21 11.94 86.93 148 994 165 1,590 67.1 1.3 <520 147 < 13.0 < 2.85 << 60.0 < 9.00 < 50.0 << 1.25 <<<< 3.00 < 1.60 -< 120 12.5 <481 < 3.80 37.3 < 3.50 < 3.55 <1,400 17.5 < 12.0 <<<< 2.60 < 1.40 -----MW3 12/20/21 12.4 86.47 39.7 115 16.7 88.8 22.8 3.76 31.3 10.9 <<<<< 12.0 <12.5 <<<<<< 0.600 <-< 24.0 0.835 <13.5 0.82 3.11 <<<1,190 5.77 < 2.40 <<<<< 0.280 -----MW3 3/15/22 7.88 90.99 1.4 3.93 0.671 4.82 4.12 < 0.200 <0.852 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 <48.5 0.265 < 2.40 <<<<< 0.280 -----MW3 6/2/22 10.78 88.09 0.884 1.27 1.18 5 1.39 < 0.200 <2.02 0.679 <<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW3 12/28/22 9.9 88.97 < 0.130 < 0.410 < 0.500 < 1.60 2.84 <<< 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW3 6/28/23 7.27 91.6 < 0.500 44.8 7.9 208 1.7 < 0.200 <24.3 21.3 <<<<<<<<<<<<<<<<<4.34 <<<<<9.55 <<<<<<<-----MW4 3/14/13 7.44 91.88 4,190 40,200 3,350 16,700 <100 <100 <1,750 421 <<<-<<<<<<<<100 <--<<1,000 762 <233 <<<---<<<-20,300 4,910 7,060 1.3 5.2MW411/12/13 11/13: 11.48 87.84 4,400 35,100 3,610 17,490 3.57 0.24 <2,640 59.1 <<<-<<<0.124 <<<0.105 <<0.172 <--10.6 <0.0850 69.3 <0.0600 28.4 1.19 0.770 <---0.770 <0.0540 <0.139 ------MW4 3/17/15 5.13 94.19 4,260 31,600 4,330 21,370 26.3 <2.30 <2,370 619 <9.45 <<-<<8.80 <<<<<<4.30 <--102 <4.75 896 <286 <2.30 <2.23 <1.85 ---<2.23 <1.35 <------MW4 4/25/16 5.28 94.04 2,070 16,400 3,300 12,950 <84.5 <46 <2,640 740 <<<-<<<<<<<<86 <--<49 <95 1,160 <290 <46 <44.5 <---<<27 <------MW4 10/19/16 4.53 94.79 1,740 16,100 3,080 13,300 10.8 <2.3 31.8 3,230 744 <9.45 <<-<115 <3.1 <3.98 <2.48 <2.62 <4.42 <4.3 <--123 <4.75 1,240 <1.5 275 <2.3 27 46.2 ---<2.22 <1.35 <3.48 ------MW4 3/17/17 7.43 91.89 1,960 15,900 3,980 19,000 <33.8 <18.4 <3,450 886 <<<-<484 <<<<<<<--334 <1,220 <332 <<<14.8 ---<<<------MW4 10/3/17 11.05 88.27 3,030 19,700 3,870 17,500 <33.8 <18.4 <3,330 766 <<<<536 <<70.4 <<<<<<34.4 <-<600 98 <1,110 <302 <228 282 <528 <400 <200 <<<<400 -----MW4 5/16/18 8.29 91.03 2,370 21,900 4,190 15,970 < 33.8 < 18.4 <3,240 976 < 56.0 <<-< 50.6 < 70.4 <<<<<< 32.0 <-< 600 318 <944 <552 <294 406 ---<< 10.8 <------MW4 12/12/19 9.96 89.36 1,320 14,700 2,110 9,570 <0.169 0.51 <1,400 640 <<<<<<<<<<<<<-<103 <1,130 <294 12.4 6.7 40 495 <<<<<<-----MW4 2/26/21 3.45 95.87 537 3,000 1,410 6,170 < 18.5 < 17.5 < 21.0 1,950 502 < 65.0 << 77.5 < 300 < 45.0 < 250 < 12.5 < 17.8 < 12.5 < 12.5 < 12.5 < 15.0 <-< 1300 52.2 < 75.0 517 < 19.0 113 < 17.5 < 17.8 < 25.0 152 < 15.0 < 60.0 < 15.8 < 14.5 < 12.5 < 17.0 -----MW4 10/13/21 10.6 88.72 624 7,750 1,490 8,820 < 11.0 < 10.0 <1,620 462 < 130 < 28.5 << 600 < 90.0 < 500 << 12.5 <<<< 30.0 < 16.0 -< 1200 59.4 <623 < 38.0 152 < 35.0 < 35.5 << 225 < 11.5 < 120 <<<< 26.0 < 14.0 -----MW4 12/20/21 12.76 86.56 452 3,530 663 4,040 < 4.40 < 4.00 778 225 <<<<< 240 << 200 <<<<<< 12.0 <-< 480 26.3 <429 < 15.2 65.4 <<<656 < 4.60 < 48.0 <<<<< 5.60 -----MW4 3/15/22 6.73 92.59 99.9 1,280 109 7,710 35 < 0.200 <1,330 644 32.4 < 0.570 151 < 12.0 47.7 267 < 0.500 <<<<< 1.00 <-< 24.0 12 <346 < 0.760 20.7 2.84 6.09 <424 9.19 < 2.40 <<<<< 0.280 -----MW4 6/2/22 9.12 90.2 256 3,110 162 10,600 20.3 < 10.0 <1,120 412 <<199 <<<<<<<<<<-<<<384 <<<<<419 <<<<<<<-----MW4 12/28/22 9.17 90.15 168 867 269 4,090 18.3 < 1.00 <643 263 17.6 <<<<81 <<<<<<<<<13.6 <315 12.3 31.3 <<<<<<<<<<<-----MW4 6/28/23 7.03 92.29 83.8 1,590 214 9,820 13.7 < 4.00 <1,510 588 <<<<<<<<<<<<<<<14.4 <425 <<<<<<<<<<<<<-----TMW5 10/25/13 --6,090 10,400 756 3,310 8,610 <25 <356 80.6 <<<-<<<25 <<<25 <<25 <-<<25 <27 197 <25 58.8 <25 <25 <---<25 <25 <25 -7,870 <1,800 <1,800 0.82 26.9TMW610/25/13 --0.72 1.9 0.19 0.46 0.28 <0.10 <<0.10 <0.10 <<<-<<<0.10 <<<0.10 <<0.10 <-<<0.10 0.22 <0.15 <0.10 <0.10 <0.10 <0.10 <---<0.10 0.87 0.29 -<35 <35 <35 <0.0096 408TMW710/25/13 --9.3 1.7 1.3 0.72 23.5 0.12 <0.24 <0.10 <<<-<<<0.10 <<<0.10 <0.26 <-<3 <0.11 6.7 0.17 0.69 <0.10 <0.10 <---<0.10 <0.10 <0.10 -57.7 <35 54.1 <0.0097 11.9TMW810/25/13 --0.28 1.3 0.16 0.36 <0.10 <0.10 <0.11 <0.10 <<<-<<<0.10 <<<0.10 <0.23 <-<<0.10 <0.11 0.28 <0.10 <0.10 <0.10 <0.10 <---<0.10 <0.10 <0.10 -<35 <35 <35 <0.0096 <5MW911/12/13 11/13: 11.42 87.3 1,540 2,380 297 1,143 1,090 <1.84 <280 76.2 <<<-<<<2.48 <<<2.10 <<3.44 <--24.8 <1.70 24.4 <1.20 54.2 5.2 4.2 <---4.2 <1.08 <2.78 -710 680 600 0.719 <3.30MW93/17/15 4.43 94.29 797 1,390 282 1,044 783 <2.30 <216 67.8 76.3 <<-<376 <<<<<<4.30 <--35.3 10 64.3 <35 <2.30 <2.23 <1.85 ---<2.23 <1.35 <------MW9 4/25/16 6.8 91.92 496 818 202 692 487 <1.84 <162 44.8 <<<-<<<<<<<<3.44 <--14.6 <3.80 109 <28.2 <1.84 <1.78 <---<<1.08 <------MW9 10/19/16 4.58 94.14 364 640 66.7 339 314 1.6 <1.38 39.7 13.4 <3.78 <<-<18.7 <1.24 <1.59 <0.99 <1.05 <1.77 <1.72 <--2.5 <1.9 26.5 <0.6 5.2 <0.92 <0.89 <0.74 ---<0.89 <0.54 <1.39 ------MW9 3/17/17 7.1 91.62 731 1,130 115 634 291 2.4 <62 21.2 <<<-<141 <<<<<<<--15.3 <46.2 <8.1 <<<0.740 ---<<<------MW9 10/3/17 11.35 87.37 278 543 87.2 519 62.2 <2.30 <89.2 30 <<<-<<8.80 <<<<<<4.30 <-below RL: 126 4.25 <83 <12 <27.2 <1.85 ---<<<------MW9 5/16/18 8.6 90.12 1,220 2,930 287 1,305 714 8 <192 67.8 < 2.80 <<-< 2.53 53.2 <<<<<< 1.60 <-8,680 18 <56.8 <36.4 <15 < 0.740 ---<< 0.540 <------MW9 6/27/18 8.42 90.3 454 997 95.3 512 168 < 0.920 <76.5 23.1 < 2.80 <<<< 2.53 10.4 <<<<<< 1.60 <-< 30.0 < 0.980 <39.3 <8.2 << 0.890 < 0.740 <<<<< 0.540 <<-----MW9 12/12/19 9.6 89.12 2,360 4,270 661 3,360 1,740 16 <599 167 <<<<6.24 23.7 <<<<<<<-<28.8 <351 <0.0600 83.6 3.89 3.16 3.77 3,280 27.2 <<0.339 <<<-----MW9 2/26/21 3.63 95.09 951 1,570 128 574 550 < 7.00 < 8.40 71.7 22.7 < 26.0 << 31.0 < 120 < 18.0 139 < 5.00 < 7.10 < 5.00 < 5.00 < 5.00 < 6.00 <-< 520 < 5.30 < 30.0 30.3 < 7.60 8.43 < 7.00 < 7.10 < 10.0 424 11.6 < 24.0 < 6.30 < 5.80 < 5.00 < 6.80 -----MW9 10/13/21 11.45 87.27 1,410 4,060 333 1,600 830 7.54 <326 113 < 26.0 < 5.70 << 120 < 18.0 < 100 << 2.50 <<<< 6.00 27.6 -< 240 14.9 <137 < 7.60 44 < 7.00 < 7.10 <854 < 2.30 < 24.0 <<<< 5.20 < 2.80 -----MW9 12/20/21 12.43 86.29 140 771 109 1,440 250 < 4.00 274 145 <<<<< 240 << 200 <<<<<< 12.0 <-58,600 < 10.6 <41.8 < 15.2 14.1 <<<305 < 4.60 < 48.0 <<<<< 5.60 -----MW9 3/15/22 7.09 91.63 771 1,230 83.3 546 669 9.32 <45.3 26 < 13.0 < 2.85 < 7.00 < 60.0 < 9.00 58.1 < 2.50 <<<<5.7 <-< 120 < 2.65 <9.3 < 3.80 3.85 < 3.50 < 3.55 <815 14.7 < 12.0 <<<<< 1.40 -----MW9 6/2/22 10.4 88.32 1,500 2,760 169 1,060 611 5.21 <119 49.8 144 <<<<<<<<<<<<-<<<<<<<<<358 61.7 <<<<<<-----MW9 12/28/22 9.24 89.48 345 691 43 210 134 1.93 <25 8.81 71.2 <<<<22.4 <<<<<9.35 <<1,360 1.3 <19 <3.66 <<<<<<<<<<<-----MW9 6/28/23 6.93 91.79 493 1,040 88.5 519 190 2.13 <68.3 22.8 <<<<<<<<<<<<<<<<<36 <<<<<97.9 4.99 <<<<<<-----Notes:1. All results in µg/L2. Bold denotes a compound detection 3. Shading denotes a 2L Standard violation4. Italics indicates a GCL violation5. < - denotes less than sample detection limit6. * It is believed that the 4/25/16 MW12 and MW16 samples were switched at some point following sampling and generation of the lab report. Monitoring well MW12 was resampled on 5/26/16 to confirm the anomalous data. Odors noted from the purged water from MW12 confirmed that well is contaminated as it has been historically. The results are listed correctly here. 7. ** The 2L Standards listed for the C9-C10 Aromatic carbon fraction class are actually for the C9-C22 Aromatic caron fraction class. IPE3,3-Dimethyl-1-butanol1,2,4-TrimethylbenzeneCarbon Tetrachloride1,2,3-Trichloropropane4-Methyl-2-pentanone (MIBK)2-Hexanone HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Poco Shop #1 Incident No. 29796
MTBETotal XylenesC5-C8 AliphaticsContaminant of Concern
BromodichloromethaneBenzeneChlorodibromomethane1,3,5-TrimethylbenzeneBromoformAcetone2-Butanone (MEK)Methylene ChlorideDibromochloromethaneIsopropylbenzeneChlorobenzenen-ButylbenzeneChloroformtert-Amyl methyl EtherNaphthaleneAnalytical Method
TolueneEthylbenzeneEthanol2-ChlorotolueneChloromethaneC9-C10 Aromaticssec-ButylbenzeneTrichlorofluoromethaneEthyl tert-butyl etherTetrachloroethene (PCE)C9-C12 Aliphatics4-IsopropyltolueneTrichloroethylenetert-Butylbenzenetert-Butyl formateLeadEDBn-PropylbenzeneStyrenetert-Amyl alcohol
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6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B+oxygenates6200B+oxygenates6200B6200B6200B6200B6200B+oxygenatesMADEPVPHMADEPVPHMADEPVPH504.16010BWell ID Date Collected
Depth to Groundwater (feet)Groundwater Elevation (feet)IPE3,3-Dimethyl-1-butanol1,2,4-TrimethylbenzeneCarbon Tetrachloride1,2,3-Trichloropropane4-Methyl-2-pentanone (MIBK)2-Hexanone HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Poco Shop #1 Incident No. 29796
MTBETotal XylenesC5-C8 AliphaticsContaminant of Concern
BromodichloromethaneBenzeneChlorodibromomethane1,3,5-TrimethylbenzeneBromoformAcetone2-Butanone (MEK)Methylene ChlorideDibromochloromethaneIsopropylbenzeneChlorobenzenen-ButylbenzeneChloroformtert-Amyl methyl EtherNaphthaleneAnalytical Method
TolueneEthylbenzeneEthanol2-ChlorotolueneChloromethaneC9-C10 Aromaticssec-ButylbenzeneTrichlorofluoromethaneEthyl tert-butyl etherTetrachloroethene (PCE)C9-C12 Aliphatics4-IsopropyltolueneTrichloroethylenetert-Butylbenzenetert-Butyl formateLeadEDBn-PropylbenzeneStyrenetert-Amyl alcoholMW10 11/12/13 11/13: 11.53 87.03 3,050 4,770 46.7 204 2,340 2.16 <42.7 11.5 <<<-<<<0.124 <<<0.105 <<0.172 <--2.70 <0.0850 7.35 <0.0600 7.37 0.49 0.28 <---0.28 <0.0540 <0.139 -1,240 1,020 1,000 1.39 <3.30MW103/17/15 4.57 93.99 3,110 5,100 604 2,666 1,670 43.4 <483 147 <3.78 <<-<<3.52 <<<<<<1.72 <--24.6 <1.90 251 <48.7 <0.920 <0.890 <0.740 ---<0.890 <0.540 <------MW10 4/25/16 6.74 91.82 6,700 <2.85 1,010 4,750 4,180 63.5 <790 216 <<<-<<<<<<<<8.60 <--<4.90 30 318 <105 <4.60 <4.45 <---<<2.70 <------MW10 10/19/16 4.49 94.07 4,630 5,210 737 4,750 1,690 28.4 <1.38 737 214 <3.78 <<-<<3.52 <1.24 <1.59 <0.99 <1.05 <1.77 <1.72 <--26.2 <1.9 364 <0.6 54.9 <0.92 9.3 9.9 ---<0.89 <0.54 <1.39 ------MW10 3/17/17 7.05 91.51 7,510 15,800 1,200 7,260 1,720 55 <945 290 <<<-<77 <<<<<<<--156 <450 <121 <<<7.40 ---<<<------MW10 10/3/17 11.27 87.29 10,000 12,600 1,040 5,500 1,260 60 <606 170 <<<<536 <<70.4 <<<<<<34.4 <-<600 36 <628 <106 <<17.8 <14.8 <528 <400 <200 <<<<400 -----MW10 5/16/18 8.55 90.01 7,990 14,400 1,090 5,360 1,610 80 <860 372 392 <<-< 50.6 < 70.4 <<<<<< 32.0 <-< 600 244 <740 <318 << 17.8 < 14.8 ---<< 10.8 <------MW10 6/27/18 8.35 90.21 4,780 < 11.4 664 3,320 1,040 < 18.4 <462 124 < 56.0 <<<< 50.6 < 70.4 <<<<<< 32.0 <-< 600 < 19.6 << 18.8 << 13.0 << 17.8 < 14.8 <<<<< 10.8 <<-----MW10 12/12/19 9.6 88.96 8,220 14,300 1,300 6,940 1,910 62.3 <1,170 308 <<<<<<<<<<<<<-<55.5 <470 <149 7.22 4.72 13.5 <<<<<<<-----MW10 2/26/21 3.89 94.67 1,270 1,780 124 775 370 < 14.0 < 16.8 110 42.4 < 52.0 << 62.0 < 240 < 36.0 < 200 < 10.0 < 14.2 < 10.0 < 10.0 < 10.0 < 12.0 <-< 1040 < 10.6 < 60.0 48.3 < 15.2 < 13.8 < 14.0 < 14.2 < 20.0 438 20.6 < 48.0 < 12.6 < 11.6 < 10.0 < 13.6 -----MW10 10/13/21 11.64 86.92 11,600 28,300 2,420 13,100 1,430 62.1 <1,930 505 < 260 < 57.0 << 1200 < 180 < 1000 << 25.0 <<<< 60.0 < 32.0 -< 2400 81.8 <667 < 76.0 214 < 70.0 < 71.0 <2,650 500 < 240 <<<< 52.0 < 28.0 -----MW10 12/20/21 11.04 87.52 1,050 1,330 109 649 1,030 16.2 98.4 37.1 <<<<< 120 << 100 <<<<<< 6.00 <-< 240 < 5.30 <53.4 < 7.60 < 6.90 <<<1,210 37.5 < 24.0 <<<<< 2.80 -----MW10 3/15/22 7.74 90.82 1,740 5,840 587 4,680 1,470 74.2 <657 307 80.1 < 11.4 < 28.0 < 240 < 36.0 380 < 10.0 <<<<< 20.0 <-< 480 15.9 <223 < 15.2 34.3 < 14.0 < 14.2 <1,320 176 < 48.0 <<<<< 5.60 -----MW10 6/2/22 10.55 88.01 7,700 15,300 886 5,070 713 41.7 <453 145 <<<<<<<<<<<<<-<<<<<<<<<<108 <<<<<<-----MW10 12/28/22 9.79 88.77 6,780 19,500 1,630 8,610 226 28.3 <1,330 392 <<<<<<<<<<<<<<<57.1 <1,010 <157 <<<<<<<<<<<-----MW10 6/28/23 7.00 91.56 4,120 9,300 580 3,500 1,010 23.3 <336 104 <<<<<<<<<<<<<<<<<<<<<<<1,060 53 <<<<<<-----MW11 11/12/13 11/13: 12.12 87.18 0.790 3.32 0.780 2 <0.169 <0.0920 <0.47 0.12 <<<-<<0.28 <<<0.105 <1.07 <--<0.0980 <0.0850 <0.0940 <0.0600 0.3 0.29 <0.0890 <---<0.0890 <0.0540 <0.139 -110 70 60 <0.00599 <3.30MW113/17/15 5.25 94.05 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--1.69 <0.190 <0.0940 <<0.0650 1.26 <0.0890 <0.0740 ---1 <0.0540 <------MW11 4/25/16 7.55 91.75 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--2.07 <0.190 <0.0940 <<0.0650 1.6 <0.0890 <---<<0.0540 <------MW11 10/19/16 5.15 94.15 <0.119 0.16 <0.0920 0.18 <0.169 <0.0920 <0.138 <0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.159 <0.099 <0.105 <0.177 <0.172 <--<0.098 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.0890 <0.0540 <0.139 ------MW11 3/17/17 7.73 91.57 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--2.63 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW11 10/3/17 12 87.3 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<1.72 <<<<<<0.172 <-<3.00 <0.0980 <<0.0940 <<0.0650 <<0.0890 <0.0740 ---<<<------MW11 5/16/18 9.23 90.07 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 0.77 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW11 12/12/19 10.25 89.05 3.51 9.08 1.05 5.14 <0.169 <0.0920 <1.2 < 0.0870 < 0.280 <<-< 0.253 <<<<<<<<-< 3.00 < 0.0980 <5.78 << 0.0650 << 0.0890 <---<< 0.0540 <------MW11 2/26/21 4.58 94.72 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW11 10/13/21 12.28 87.02 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW11 12/20/21 13 86.3 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW11 3/15/22 7.9 91.4 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW11 6/2/22 11.3 88 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<0.562 <<<<1.1 <<<<<<<<<<-----MW11 12/28/22 9.89 89.41 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW11 6/28/23 7.54 91.76 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW12 11/12/13 11/13: 12.74 86.8 410 68.5 169 64.1 183 1.27 <7.94 3.24 <<<-<<<0.124 <<<0.105 <1.79 <--7.42 <0.0850 32.4 <0.0600 15.8 0.900 0.26 <---0.26 <0.0540 <0.139 -150 180 140 <0.00597 <3.30MW123/17/15 5.76 93.78 1,180 437 1,100 1,482 470 2.93 <507 204 <0.378 <<-<<0.352 <<<<<<0.0172 <--57.7 <0.190 285 <157 8.67 4.2 8.16 ---<0.0890 0.34 <------*MW12 4/25/16 7.82 91.72 1,270 1,910 1,390 3,430 441 4.11 <855 291 <<<-<<<<<<<14.1 <--67.4 <0.190 331 <182 9.53 4.18 <---<<0.0540 <------MW12 5/26/16 --1,400 2,980 1,650 5,180 396 <0.92 <1,250 320 <<<-<<<<<<<<1.72 <--77.3 <1.9 349 <210 960 <0.89 13 ---<<0.54 <------MW12 10/19/16 5.5 94.04 892 1,090 992 2,130 311 2.9 <1.38 552 203 <3.78 <<-<151 <1.12 <1.59 <0.99 <1.05 <1.77 8.7 <--59.9 <1.9 265 16.7 130 <0.92 6.5 7.7 ---<0.89 <0.54 <1.39 ------MW12 3/17/17 8.03 91.51 1,400 3,370 1,190 5,440 376 4.75 <894 264 <<<-<59 <<<<<<<--61.5 <310 <128 <<38.8 ---<<<------MW12 10/3/17 12.35 87.19 2,250 4,390 2,260 6,480 221 <4.60 <1,270 352 <<<<134 <<17.6 <<<<<24 <-<150 63 <360 <218 <60 69 1,860 <100 <50.0 <<<<100 -----MW12 5/16/18 9.59 89.95 1,090 139 947 1,187 336 < 4.60 <543 210 < 14.0 <<-< 12.7 < 17.6 <<<<<< 8.00 <-< 150 83 <220 <152 <77 < 3.70 ---<< 2.70 <------MW12 12/12/19 10.68 88.86 891 446 981 2,366 212 3.12 <694 182 <<<<2.54 <<<<<<<<-<43.1 <252 <107 5.96 3.09 6.4 547 8.72 <<0.65 <<-----MW12 2/26/21 5.15 94.39 39.4 32.2 4.47 172 190 2.02 < 1.68 24.5 9.47 < 5.20 << 6.20 < 24.0 < 3.60 < 20.0 < 1.00 < 1.42 < 1.00 < 1.00 < 1.00 8.42 <-< 104 < 1.06 < 6.00 4.78 < 1.52 < 1.38 < 1.40 < 1.42 < 2.00 708 7.27 < 4.80 < 1.26 < 1.16 < 1.00 < 1.36 -----MW12 10/13/21 13.57 85.97 2.18 9.71 1.91 2.77 18.5 < 0.200 <1.44 0.673 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<1.55 < 0.320 -< 24.0 < 0.530 <2.96 < 0.760 < 0.690 < 0.700 < 0.710 <17.9 < 0.230 < 2.40 <<<0.552 < 0.280 -----MW12 12/20/21 --3.47 7.57 1.26 17.7 17.7 0.381 3.42 1.48 <<<<< 12.0 << 10.0 <<<<<0.972 <-< 24.0 < 0.530 <4.38 < 0.760 < 0.690 <<<93.7 2.83 < 2.40 <<<<< 0.280 -----MW12 3/15/22 8.69 90.85 < 0.130 < 0.410 < 0.500 < 1.60 11 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<2.09 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW12 6/2/22 11.58 87.96 < 0.130 < 0.410 < 0.500 < 1.60 8.41 < 0.200 <<<5.89 <<<<<<<<<<1.37 <-<<<<<<<<<<<<<<<<<-----MW12 12/28/22 10.3 89.24 < 0.130 < 0.410 < 0.500 < 1.60 3.94 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW12 6/28/23 8.02 91.52 < 0.500 < 0.900 < 0.500 < 1.60 2.16 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW13 8/22/14 11.93 87.09 6,770 18,500 1,490 7,320 6,490 120 <2,270 501 <<<-<<<1.24 <<<1.05 <<1.72 <--96.7 <0.850 706 <0.600 256 <0.920 <0.890 <---<0.890 <0.540 <1.39 -4,690 4,340 4,740 0.994 <3.30MW133/17/15 5.06 93.96 1,770 5,360 627 2,590 684 8.8 <560 167 <3.78 <<-<<3.52 <<<<<<1.72 <--25.5 <1.90 139 <58.2 <0.920 <0.890 <0.740 ---<0.890 <0.540 <------MW13 4/25/16 7 92.02 4,550 13,900 1,900 7,500 4,290 100 <1,680 490 <<<-<<<<<<<<8.60 <--82 <9.50 527 <226 <4.60 <4.45 <---<<2.70 <------MW13 10/19/16 5.1 93.92 3,000 4,220 951 4,110 2,620 54.7 <1.38 773 211 <3.78 <<-<<3.52 <1.24 <1.59 <0.99 <1.05 <1.77 <1.72 <--49.6 12.9 242 17.3 110 6.6 6.5 7.7 ---<0.89 <0.54 <1.39 ------MW13 3/17/17 7.6 91.42 9,110 19,700 3,340 15,300 1,990 63 <2,600 675 <<<-<201 <<<<<<<--199 <744 <301 <<148 ---<<<------MW13 10/3/17 11.85 87.17 12,800 29,200 3,150 16,100 2,280 178 <2,230 530 <<<<670 <<88.0 <<<<<<43.0 <-<750 92.5 <875 <265 <278 330 6,960 below RL: 652 <250 <<<<500 -----MW13 5/16/18 9.08 89.94 664 2,080 936 2,971 133 9.78 <986 317 < 0.280 <<-4.06 1.16 <<<<<< 0.160 <-< 3.00 81.4 <206 <136 <6.57 8.21 ---<< 0.0540 <------MW13 12/12/19 10.03 88.99 2,270 6,320 758 3,670 892 52.2 <676 180 < 0.280 <<<<<<<<<<<<-< 3.00 32.6 <359 <79.2 4.37 3.49 6.97 947 <<<<<<-----MW13 2/26/21 3.38 95.64 1.76 23.7 37.4 182 < 0.740 < 0.700 < 0.840 84 23.1 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 1.83 < 3.00 11 1.83 5.5 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW13 10/13/21 12.11 86.91 123 229 91.5 116 78.4 2.37 <59.1 20.4 < 5.20 < 1.14 << 24.0 < 3.60 < 20.0 << 0.500 <<<< 1.20 < 0.640 -< 48.0 4.02 <52.5 < 1.52 9.83 < 1.40 < 1.42 <92.7 9.92 < 4.80 <<<< 1.04 < 0.560 -----MW13 12/20/21 12.4 86.62 5,130 11,900 1,260 5,630 1,170 72.2 897 238 <<<<< 300 << 250 <<<<<< 15.0 <-< 600 48.3 <439 < 19.0 128 <<<2,650 469 < 60.0 <<<<< 7.00 -----MW13 3/15/22 7.79 91.23 332 227 266 1,150 88.3 7.58 <423 115 < 13.0 < 2.85 < 7.00 < 60.0 < 9.00 < 50.0 < 2.50 <<<<7.47 <-< 120 9.86 <108 6.92 17.3 < 3.50 < 3.55 <307 18.8 < 12.0 <<<<< 1.40 -----MW13 6/2/22 11.11 87.91 157 252 370 2,490 33.7 < 2.00 <688 687 <<<<<<<<<<<<<-<16.4 <129 <54 <<<<<<<<<<<-----MW13 12/28/22 9.97 89.05 153 69.4 207 167 79.3 1.59 <87.7 25.4 <<<<<<<<<<<<<<<13 <76.4 4.49 30.8 2.36 1.43 <<<<<<<<<-----MW13 6/28/23 7.47 91.55 3.98 18.2 105 597 < 0.220 < 0.200 <261 57.3 2.99 <<<<16.1 <<<<<<<<<3.75 <48.7 3.43 10.3 <<<<<<<<<<<-----MW14 8/22/14 12.45 87.05 0.81 <0.0570 <0.0920 <0.298 4.56 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <0.87 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 -<0.0150 <0.0150 <0.00500 <0.00650 <3.30MW143/17/15 5.61 93.89 <0.119 <0.0570 <0.0920 <0.298 0.530 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <------MW14 4/25/16 7.96 91.54 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW14 10/19/16 5.61 93.89 <0.119 0.46 0.13 0.56 <0.169 <0.0920 <0.138 <0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.159 <0.099 <0.105 <0.177 <0.172 <--<0.098 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.0890 <0.0540 <0.139 ------MW14 3/17/17 8.11 91.39 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW14 10/3/17 12.38 87.12 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<0.172 <-<3.00 <0.0980 <<0.0940 <<0.0650 <<0.0890 <0.0740 ---<<<------MW14 5/16/18 9.59 89.91 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 1.78 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW14 12/12/19 10.56 88.94 1.99 5.9 0.84 3.59 <0.169 <0.0920 <0.89 < 0.0870 < 0.280 <<-< 0.253 <0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 <4.48 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW14 2/26/21 4.95 94.55 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW14 10/13/21 12.67 86.83 < 0.130 3.37 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW14 12/20/21 13.09 86.41 < 0.130 < 0.410 < 0.500 < 1.60 0.305 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW14 3/15/22 8.25 91.25 < 0.130 < 0.410 < 0.500 < 1.60 0.327 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < < 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW14 6/2/22 11.64 87.86 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW14 12/28/22 10.3 89.2 < 0.130 < 0.410 < 0.500 < 1.60 9.17 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW14 6/28/23 8.00 91.50 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 00200 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW15 8/22/14 12.73 86.9 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <<0.172 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 -<0.0150 <0.0150 <0.00500 <0.00627 <3.30MW153/17/15 6.05 93.58 ------<---<<-<---<---<----------------------MW15 4/25/16 8.2 91.43 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW15 3/17/17 8.28 91.35 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<-<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW15 abandoned 6/2017 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW16 8/22/14 11.62 87.02 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<0.124 <<<0.105 <<0.172 <--<0.0980 <0.0850 <0.0940 <0.0600 <0.0650 <0.0920 <0.0890 <---<0.0890 <0.0540 <0.139 -<0.0150 <0.0150 <0.00500 <0.00671 <3.30MW163/17/15 4.39 94.25 ------<---<<-<---<---<----------------------*MW16 4/25/16 6.64 92.00 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW16 3/17/17 7.08 91.56 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW16 5/16/18 8.59 90.05 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 3.29 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW16 12/12/19 9.57 89.07 0.71 2.5 <0.0920 1.07 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 <0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW16 2/26/21 3.36 95.28 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW16 10/13/21 11.98 86.66 < 0.130 7.34 < 0.500 1.77 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.708 < 0.280 -----MW16 12/20/21 11.99 86.65 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW16 3/15/22 7.26 91.38 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW16 6/2/22 10.89 87.75 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW16 12/28/22 9.12 89.52 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<105 <<<<<<<<<<<<<<<<-----MW16 6/28/23 6.84 91.80 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----Notes:-1. All results in µg/L -2. Bold denotes a compound detection -3. Shading denotes a 2L Standard violation -4. Italics indicates a GCL violation -5. < - denotes less than sample detection limit -6. * It is believed that the 4/25/16 MW12 and MW16 samples were switched at some point following sampling and generation of the lab report. Monitoring well MW12 was resampled on 5/26/16 to confirm the anomalous data. Odors noted from the purged water from MW12 confirmed that well is contaminated as it has been historically -7. ** The 2L Standards listed for the C9-C10 Aromatic carbon fraction class are actually for the C9-C22 Aromatic caron fraction class. -
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6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B+oxygenates6200B+oxygenates6200B+oxygenates6200B6200B6200B6200B6200B+oxygenatesMADEPVPHMADEPVPHMADEPVPH504.16010BWell ID Date Collected
Depth to Groundwater (feet)Groundwater Elevation (feet)IPE3,3-Dimethyl-1-butanol1,2,4-TrimethylbenzeneCarbon Tetrachloride1,2,3-Trichloropropane4-Methyl-2-pentanone (MIBK)2-Hexanone HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS Incident Name: Poco Shop #1 Incident No. 29796
MTBETotal XylenesC5-C8 AliphaticsContaminant of Concern
BromodichloromethaneBenzeneChlorodibromomethane1,3,5-TrimethylbenzeneBromoformAcetone2-Butanone (MEK)Methylene ChlorideDibromochloromethaneIsopropylbenzeneChlorobenzenen-ButylbenzeneChloroformtert-Amyl methyl EtherNaphthaleneAnalytical Method
TolueneEthylbenzeneEthanol2-ChlorotolueneChloromethaneC9-C10 Aromaticssec-ButylbenzeneTrichlorofluoromethaneEthyl tert-butyl etherTetrachloroethene (PCE)C9-C12 Aliphatics4-IsopropyltolueneTrichloroethylenetert-Butylbenzenetert-Butyl formateLeadEDBn-PropylbenzeneStyrenetert-Amyl alcoholMW17 3/17/15 3.94 93.76 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 0.63 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.00587 <0.00330MW174/25/16 6.29 91.41 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW17 3/17/17 6.34 91.36 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW17 12/12/19 8.71 88.99 <0.119 1.51 <0.0920 0.65 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW17 2/26/21 3.5 94.2 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW17 10/13/21 14.11 83.59 < 0.130 6.22 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.648 < 0.280 -----MW17 12/20/21 11.11 86.59 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW17 3/15/22 6.4 91.3 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW17 6/2/22 10.02 87.68 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW17 12/28/22 8.15 89.55 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW17 6/28/23 6.00 91.70 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW18 3/17/15 3.24 93.62 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.000590 <0.00330MW184/25/16 5.57 91.29 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW18 3/17/17 5.64 91.22 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW18 12/12/19 8.00 88.86 <0.119 1.11 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW18 2/26/21 2.65 94.21 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW18 10/13/21 10.41 86.45 < 0.130 9.29 < 0.500 2.17 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<1.09 < 0.280 -----MW18 12/20/21 10.45 86.41 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW18 3/15/22 5.69 91.17 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW18 6/2/22 9.41 87.45 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW18 12/28/22 7.35 89.51 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW18 6/28/23 5.30 91.56 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW19 3/17/15 2.71 92.96 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<0.77 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.00586 0.004MW194/25/16 5.05 90.62 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW19 3/17/17 5.04 90.63 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<0.52 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW19 5/16/18 6.7 88.97 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 3.32 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW19 12/12/19 7.34 88.33 < 0.119 0.88 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 <0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW19 2/26/21 2.25 93.42 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW19 10/13/21 9.73 85.94 < 0.130 6.53 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.741 < 0.280 -----MW19 12/20/21 9.78 85.89 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW19 3/15/22 5.09 90.58 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW19 6/2/22 8.86 86.81 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW19 12/28/22 6.21 89.46 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW20 3/17/15 3.45 93.04 1.61 <0.0570 0.15 0.432 6.29 <0.0920 <0.77 <0.0870 <0.378 <<-<<0.352 <<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <0.0740 ---<0.0890 <0.0540 <-<0.0150 <0.00500 <0.0150 <0.00588 <0.00330MW204/25/16 5.78 90.71 <0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 0.69 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------MW20 3/17/17 5.78 90.71 <0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------MW20 10/3/17 10.35 86.14 899 30.3 73.6 258 408 10.3 <69.9 9.53 <<<-<0.77 <<<<<<0.172 <-<3.00 6.57 <45 <4.56 <1.24 1.44 ---<<<------MW20 5/16/18 7.47 89.02 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 < 0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW20 12/12/19 7.8 88.69 < 0.119 0.71 < 0.0920 < 0.122 < 0.169 < 0.0920 << 0.103 < 0.0870 < 0.280 <<-< 0.253 < 0.352 <<<<<< 0.160 <-< 3.00 < 0.0980 << 0.0940 << 0.0650 << 0.0890 < 0.0740 ---<< 0.0540 <------MW20 2/26/21 1.75 94.74 < 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 < 0.500 < 0.710 < 0.500 < 0.500 < 0.500 < 0.600 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----MW20 10/13/21 10.6 85.89 < 0.130 6.18 < 0.500 1.86 < 0.220 < 0.200 <0.907 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<< 0.520 < 0.280 -----MW20 12/20/21 10.8 85.69 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW20 3/15/22 5.45 91.04 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW20 6/2/22 9.68 86.81 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW20 12/28/22 7.72 88.77 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW21 10/13/21 10.91 76.67 < 0.130 7.89 < 0.500 1.86 < 0.220 < 0.200 <0.944 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.667 < 0.280 -----MW21 12/20/21 11.33 76.25 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW21 3/15/22 6.59 80.99 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW21 6/2/22 10.14 77.44 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW21 12/28/22 8.31 79.27 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW21 6/28/23 6.75 80.83 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW22 10/13/21 7.78 88.96 < 0.130 7.02 < 0.500 1.62 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 << 12.0 < 1.80 < 10.0 << 0.250 <<<< 0.600 < 0.320 -< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<0.58 < 0.280 -----MW22 12/20/21 10.58 86.16 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW22 3/15/22 5.49 91.25 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----MW22 6/2/22 7.63 89.11 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<-<<<<<<<<<<<<<<<<<-----MW22 12/28/22 7.79 88.95 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<-----MW22 6/28/23 5.30 91.44 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<28.5 <<<<<<<<<<<<<<<<-----MWB 6/27/18 8.85 90.24 9,530 33,200 3,110 17,550 550 < 46.0 <3,680 935 < 140 <<<< 127 < 176 <<<<<< 80.0 <-< 1500 < 49.0 << 47.0 <380 << 44.5 645 <<<<< 27.0 <<-----MWB 12/12/19 10.12 88.97 3,300 4,830 1,290 6,230 452 37 <2,140 758 <<15.2 <18.7 <<<<<<<<-<93.2 <802 <236 14.8 9.64 7.64 4,250 251 <0.53 <<<-----MWB 2/26/21 3.9 95.19 2,030 2,230 2,050 1,770 208 < 14.0 < 16.8 2,020 413 < 52.0 << 62.0 < 240 < 36.0 < 200 < 10.0 < 14.2 < 10.0 < 10.0 < 10.0 < 12.0 <-< 1040 145 < 60.0 1,330 46.4 421 16.3 < 14.2 < 20.0 580 69.1 < 48.0 < 12.6 < 11.6 < 10.0 < 13.6 -----MWB 12/20/21 12.84 86.25 269 158 12.5 15.1 118 4.82 7.67 < 1.12 <<<<< 24.0 << 20.0 <<<<<< 1.20 <-< 48.0 < 1.06 <11.3 < 1.52 1.7 <<<4,310 35.3 < 4.80 <<<<< 0.560 -----MWB 3/15/22 5.54 93.55 1.09 3.24 0.584 3.58 44.7 < 0.200 <1.01 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 <3.19 < 0.760 < 0.690 < 0.700 < 0.710 <3,040 3.2 < 2.40 <<<<< 0.280 -----MWB 6/2/22 10.85 88.24 303 3,060 240 3,830 87.1 < 4.00 <549 176 <<67.7 <<214 <<<<<<<-<10.8 <278 <17.1 <<<1,970 40.6 <<<<<<-----MWB 12/28/22 9.95 89.14 0.216 < 0.410 0.701 < 1.60 15.7 < 0.200 <1.2 < 0.560 <<<<<<<<<<<<<<24.6 <<<<<<<<<<<<<<<<-----MWB 6/28/23 7.46 91.63 93.6 1,110 132 2,220 17.3 < 1.00 <369 113 <<24.4 <9.27 86.8 <<<<<<<<<6.59 <178 <8.02 <<<301 8.89 <<<<<<-----MWC 12/12/19 10.2 89.01 1,260 11,900 2,300 10,280 <33.8 43.5 <2,090 536 <<<<<<<<<<<<<-<52.2 <<<214 4.88 3.74 28.2 <<<<<<<-----MWC 2/26/21 4.32 94.89 13,800 22,900 1,460 6,370 3,870 < 140 < 168 646 159 < 520 << 620 < 2400 < 360 < 2000 < 100 < 142 < 100 < 100 < 100 < 120 <-< 10400 < 106 < 600 342 < 152 < 138 < 140 < 142 < 200 5,260 311 < 480 < 126 < 116 < 100 < 136 -----MWC 10/13/21 20.02 79.79 93.4 187 20.4 191 794 1.54 <13.7 7.81 80.9 < 2.85 << 60.0 < 9.00 94.3 << 1.25 <<<< 3.00 < 1.60 -< 120 < 2.65 <26.2 < 3.80 < 3.45 < 3.50 < 3.55 <2,060 28.8 < 12.0 <<<< 2.60 < 1.40 -----MWC 12/20/21 16.5 82.71 76.9 107 5.55 33.3 704 1.4 < 4.10 < 2.80 <<<<< 60.0 << 50.0 <<<<<< 3.00 <-< 120 < 2.65 << 5.00 < 3.80 < 3.45 <<<1,850 22 < 12.0 <<<<< 1.40 -----MWC 3/15/22 13.9 85.31 0.933 2.02 < 0.500 < 1.60 98.3 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 < 0.500 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 <1,290 2.18 < 2.40 <<<<< 0.280 -----MWC 6/2/22 11.3 87.91 0.276 0.593 < 0.500 < 1.60 527 1.2 <<<5.46 <<<<<<<<<<<<-<<<<<<<<<196 9.62 <<<<<<-----MWC 12/28/22 13.96 85.25 < 0.130 < 0.410 < 0.510 < 1.60 40.8 < 0.200 < < 0.820 < 0.560 <<<<<<<<<<<<<<37.7 <<<<<<<<<<<<<<<<-----MWC 6/28/23 7.78 91.43 < 0.500 < 0.900 < 0.500 < 1.60 290 0.376 <<<4.15 <<<<<<<<<<<<<<<<<<<<<<7.87 3.33 <<<<<<-----PW3 4/25/16 --<0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------PW3 10/19/16 --<0.119 0.17 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.0159 <<0.105 <0.177 <0.172 <--<0.0980 <0.190 1.71 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.089 <0.0540 <0.139 ------PW3 3/17/17 --<0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------Well #1 8/26/13 --<0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.620 0.55 <<0.620 1.21 <--<<<<<<<<---<<<------WELL #1 4/25/16 --<0.119 <0.0570 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<<<<<<<0.172 <--<0.0980 <0.190 <0.0940 <<0.0650 <0.0920 <0.0890 <---<<0.0540 <------Town Well 10/19/16 --<0.119 0.17 <0.0920 <0.298 <0.169 <0.0920 <<0.103 <0.0870 <0.378 <<-<<0.352 <0.124 <0.0159 <<0.105 <0.177 <0.172 <--<0.0980 <0.190 <0.0940 <0.06 <0.0650 <0.0920 <0.0890 <0.074 ---<0.089 <0.0540 <0.139 ------Well# 1 3/17/17 --<0.119 <0.0570 <0.0920 <0.180 <0.169 <0.0920 <<0.103 <0.0870 <<<-<<0.352 <<<<<<<--<0.0980 <<0.0940 <<0.0650 <<<0.0740 ---<<<------WELL#1 2/26/21 --< 0.380 < 0.410 < 0.500 < 1.60 < 0.740 < 0.700 < 0.840 < 0.820 < 0.560 < 2.60 << 3.10 < 12.0 < 1.80 < 10.0 1.9 1.58 < 0.500 < 0.500 2.87 0.926 <-< 52.0 < 0.530 < 3.00 < 1.00 < 0.760 < 0.690 < 0.700 < 0.710 < 1.00 < 4.50 < 0.600 < 2.40 < 0.630 < 0.580 < 0.500 < 0.680 -----WELL #1 12/20/21 --< 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.560 <<<<< 12.0 << 10.0 <<<<<< 0.600 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 <<<< 4.50 < 0.230 < 2.40 <<<<< 0.280 -----WSW1 3/15/22 --< 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 << 0.820 < 0.560 < 2.60 < 0.570 < 1.40 < 12.0 < 1.80 < 10.0 0.999 <<<<< 1.00 <-< 24.0 < 0.530 << 1.00 < 0.760 < 0.690 < 0.700 < 0.710 << 4.50 < 0.230 < 2.40 <<<<< 0.280 -----WELL #1 6/2/22 0.324 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<0.953 <<<<<0.611 57.9 <<<<<<<<<<<<<<<<-----1 600 600 500 20 70 no std 400 400 4,000 100 40 no std 100 6,000 0.6 4 no std 50 0.4 70 3 0.4 4,000 70 5 6 70 70 70 25 70 40 128 40 70 0.7 3 2,000 47 400 700 200**0.02 155,000 260,000 84,500 85,500 20,000 70,000 no std 28,500 25,000 4,000,000 no std 40,000 no std 100,000 6,000,000 no std 4,000 no std 50,000 400 70,000 3,000 400 4,000,000 25,000 5,000 6,000 6,900 30,000 8,500 11,700 70,000 40,000 128,000 40,000 15,000 700 3,000 2,000,000 47,000 no std no std no std 50 15,000Notes:1. All results in µg/L2. Bold denotes a compound detection 3. Shading denotes a 2L Standard violation4. Italics indicates a GCL violation5. < - denotes less than sample detection limit6. * It is believed that the 4/25/16 MW12 and MW16 samples were switched at some point following sampling and generation of the lab report. Monitoring well MW12 was resampled on 5/26/16 to confirm the anomalous data. Odors noted from the purged water from MW12 confirmed that well is contaminated as it has been historically. The results are listed correctly here. 7. ** The 2L Standards listed for the C9-C10 Aromatic carbon fraction class are actually for the C9-C22 Aromatic caron fraction class.
2L StandardGCL
APPENDIX D
ANALYTICAL REPORT
PREPARED FOR
Attn: Ryan Kerins
Terraquest Environmental Consultants, PC
100 E. Ruffin Street
Mebane, North Carolina 27302
Generated 8/15/2023 6:14:21 PM
JOB DESCRIPTION
Poco #1
JOB NUMBER
400-241692-1
See page two for job notes and contact information.
Pensacola FL 32514
3355 McLemore Drive
Eurofins Pensacola
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Eurofins Pensacola
Eurofins Pensacola is a laboratory within Eurofins Environment Testing Southeast, LLC, a company within Eurofins Environment Testing Group of Companies
Job Notes
This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the
samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this
page.
The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the
methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written
approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Southeast, LLC Project
Manager.
Authorization
Generated
8/15/2023 6:14:21 PM
Authorized for release by
Chad Bechtold, Project Manager
Chad.Bechtold@et.eurofinsus.com
(813)690-3563
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Table of Contents
Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Laboratory Job ID: 400-241692-1
Page 3 of 16 Eurofins Pensacola8/15/2023
Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
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Case Narrative
Client: Terraquest Environmental Consultants, PC Job ID: 400-241692-1
Project/Site: Poco #1
Job ID: 400-241692-1
Laboratory: Eurofins Pensacola
Narrative
Job Narrative
400-241692-1
Receipt
The sample was received on 8/9/2023 8:53 AM. Unless otherwise noted below, the sample arrived in good condition. The temperature of
the cooler at receipt time was 19.3°C. Thermal preservation is not performed for air samples.
Air - GC VOA
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
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Detection Summary
Job ID: 400-241692-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Client Sample ID: SVE STACK Lab Sample ID: 400-241692-1
Toluene
RL
1330 ppb v/v
MDL
260
Analyte Result Qualifier Unit Dil Fac D Method Prep Type
Total/NA1J343EPA-18
Gasoline Range Organics
(GRO)-C6-C10
24500 ppb v/v12200 Total/NA1121000EPA-18
Eurofins Pensacola
This Detection Summary does not include radiochemical test results.
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Sample Summary
Client: Terraquest Environmental Consultants, PC Job ID: 400-241692-1
Project/Site: Poco #1
Lab Sample ID Client Sample ID Matrix Collected Received
400-241692-1 SVE STACK Air - Tedlar Bag 08/08/23 10:40 08/09/23 08:53
Eurofins PensacolaPage 6 of 16 8/15/2023
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Client Sample Results
Job ID: 400-241692-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Lab Sample ID: 400-241692-1Client Sample ID: SVE STACK
Matrix: Air - Tedlar BagDate Collected: 08/08/23 10:40
Date Received: 08/09/23 08:53
Method: EPA-18 - Volatile Organic Compounds
RL MDL
125 U 313 125 ppb v/v 08/09/23 21:07 1
Analyte Dil FacAnalyzedPreparedUnitDResultQualifier
Benzene
1330 260 ppb v/v 08/09/23 21:07 1343JToluene
230 124 ppb v/v 08/09/23 21:07 1124UEthylbenzene
1150 230 ppb v/v 08/09/23 21:07 1230Um-Xylene & p-Xylene
1150 159 ppb v/v 08/09/23 21:07 1159Uo-Xylene
1150 368 ppb v/v 08/09/23 21:07 1368UXylenes, Total
1390 499 ppb v/v 08/09/23 21:07 1499UMethyl tert-butyl ether
24500 12200 ppb v/v 08/09/23 21:07 1121000Gasoline Range Organics
(GRO)-C6-C10
a,a,a-Trifluorotoluene (fid)96 67-139 08/09/23 21:07 1
Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery
a,a,a-Trifluorotoluene (pid)93 08/09/23 21:07 176-127
Eurofins Pensacola
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Definitions/Glossary
Job ID: 400-241692-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Qualifiers
Air - GC VOA
Qualifier Description
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.
Qualifier
U Indicates the analyte was analyzed for but not detected.
Glossary
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
Abbreviation
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level"
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Eurofins Pensacola
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Surrogate Summary
Job ID: 400-241692-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method: EPA-18 - Volatile Organic Compounds
Prep Type: Total/NAMatrix: Air - Tedlar Bag
Lab Sample ID Client Sample ID (67-139)(76-127)
TFT-F TFT-P
96 93400-241692-1
Percent Surrogate Recovery (Acceptance Limits)
SVE STACK
96 91LCS 400-636435/1001 Lab Control Sample
97 90MB 400-636435/3 Method Blank
Surrogate Legend
TFT-F = a,a,a-Trifluorotoluene (fid)
TFT-P = a,a,a-Trifluorotoluene (pid)
Eurofins Pensacola
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QC Association Summary
Job ID: 400-241692-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Air - GC VOA
Analysis Batch: 636435
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Air - Tedlar Bag EPA-18400-241692-1 SVE STACK Total/NA
Air - Tedlar Bag EPA-18MB 400-636435/3 Method Blank Total/NA
Air - Tedlar Bag EPA-18LCS 400-636435/1001 Lab Control Sample Total/NA
Eurofins Pensacola
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QC Sample Results
Job ID: 400-241692-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method: EPA-18 - Volatile Organic Compounds
Client Sample ID: Method BlankLab Sample ID: MB 400-636435/3
Matrix: Air - Tedlar Bag Prep Type: Total/NA
Analysis Batch: 636435
RL MDL
Benzene 125 U 313 125 ppb v/v 08/09/23 13:35 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResultQualifier
260 U 2601330 ppb v/v 08/09/23 13:35 1Toluene
124 U 124230 ppb v/v 08/09/23 13:35 1Ethylbenzene
230 U 2301150 ppb v/v 08/09/23 13:35 1m-Xylene & p-Xylene
159 U 1591150 ppb v/v 08/09/23 13:35 1o-Xylene
368 U 3681150 ppb v/v 08/09/23 13:35 1Xylenes, Total
499 U 4991390 ppb v/v 08/09/23 13:35 1Methyl tert-butyl ether
12200 U 1220024500 ppb v/v 08/09/23 13:35 1Gasoline Range Organics
(GRO)-C6-C10
a,a,a-Trifluorotoluene (fid)97 67-139 08/09/23 13:35 1
MB MB
Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery
90 08/09/23 13:35 1a,a,a-Trifluorotoluene (pid)76-127
Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-636435/1001
Matrix: Air - Tedlar Bag Prep Type: Total/NA
Analysis Batch: 636435
Benzene 15700 14310 ppb v/v 91 85 -115
Analyte
LCS LCS
DUnitResultQualifier %Rec
Spike
Added
%Rec
Limits
Toluene 13300 12520 ppb v/v 94 85 -115
Ethylbenzene 11500 11340 ppb v/v 99 85 -115
m-Xylene & p-Xylene 23000 23950 ppb v/v 104 85 -115
o-Xylene 11500 10920 ppb v/v 95 85 -115
Xylenes, Total 34500 34860 ppb v/v 101 85 -115
Methyl tert-butyl ether 27700 24000 ppb v/v 87 85 -115
Gasoline Range Organics
(GRO)-C6-C10
196000 181400 ppb v/v 93 85 -115
a,a,a-Trifluorotoluene (fid)67 -139
Surrogate
96
LCS LCS
Qualifier Limits%Recovery
91a,a,a-Trifluorotoluene (pid)76 -127
Eurofins Pensacola
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Lab Chronicle
Client: Terraquest Environmental Consultants, PC Job ID: 400-241692-1
Project/Site: Poco #1
Client Sample ID: SVE STACK Lab Sample ID: 400-241692-1
Matrix: Air - Tedlar BagDate Collected: 08/08/23 10:40
Date Received: 08/09/23 08:53
Analysis EPA-18 BJ08/09/23 21:071 EET PEN636435
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Client Sample ID: Method Blank Lab Sample ID: MB 400-636435/3
Matrix: Air - Tedlar BagDate Collected: N/A
Date Received: N/A
Analysis EPA-18 BJ08/09/23 13:351 EET PEN636435
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Client Sample ID: Lab Control Sample Lab Sample ID: LCS 400-636435/1001
Matrix: Air - Tedlar BagDate Collected: N/A
Date Received: N/A
Analysis EPA-18 BJ08/09/23 11:421 EET PEN636435
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Laboratory References:
EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001
Eurofins Pensacola
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Method Summary
Job ID: 400-241692-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method Method Description LaboratoryProtocol
EPAEPA-18 Volatile Organic Compounds EET PEN
Protocol References:
EPA = US Environmental Protection Agency
Laboratory References:
EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001
Eurofins Pensacola
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Accreditation/Certification Summary
Client: Terraquest Environmental Consultants, PC Job ID: 400-241692-1
Project/Site: Poco #1
Laboratory: Eurofins Pensacola
Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.
Authority Program Identification Number Expiration Date
North Carolina (WW/SW)State 314 12-31-23
The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which
the agency does not offer certification.
Analysis Method Prep Method Matrix Analyte
EPA-18 Air - Tedlar Bag Benzene
EPA-18 Air - Tedlar Bag Ethylbenzene
EPA-18 Air - Tedlar Bag Gasoline Range Organics (GRO)-C6-C10
EPA-18 Air - Tedlar Bag Methyl tert-butyl ether
EPA-18 Air - Tedlar Bag m-Xylene & p-Xylene
EPA-18 Air - Tedlar Bag o-Xylene
EPA-18 Air - Tedlar Bag Toluene
EPA-18 Air - Tedlar Bag Xylenes, Total
Eurofins Pensacola
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Login Sample Receipt Checklist
Client: Terraquest Environmental Consultants, PC Job Number: 400-241692-1
Login Number: 241692
Question Answer Comment
Creator: Perez, Trina M
List Source: Eurofins Pensacola
List Number: 1
N/ARadioactivity wasn't checked or is </= background as measured by a survey
meter.
TrueThe cooler's custody seal, if present, is intact.
N/ASample custody seals, if present, are intact.
TrueThe cooler or samples do not appear to have been compromised or
tampered with.
N/ASamples were received on ice.
TrueCooler Temperature is acceptable.
TrueCooler Temperature is recorded.19.3°C IR-11
TrueCOC is present.
TrueCOC is filled out in ink and legible.
TrueCOC is filled out with all pertinent information.
TrueIs the Field Sampler's name present on COC?
TrueThere are no discrepancies between the containers received and the COC.
TrueSamples are received within Holding Time (excluding tests with immediate
HTs)
TrueSample containers have legible labels.
TrueContainers are not broken or leaking.
TrueSample collection date/times are provided.
TrueAppropriate sample containers are used.
TrueSample bottles are completely filled.
N/ASample Preservation Verified.
TrueThere is sufficient vol. for all requested analyses, incl. any requested
MS/MSDs
N/AContainers requiring zero headspace have no headspace or bubble is
<6mm (1/4").
TrueMultiphasic samples are not present.
TrueSamples do not require splitting or compositing.
N/AResidual Chlorine Checked.
Eurofins Pensacola
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ANALYTICAL REPORT
PREPARED FOR
Attn: Ryan Kerins
Terraquest Environmental Consultants, PC
100 E. Ruffin Street
Mebane, North Carolina 27302
Generated 9/19/2023 12:37:40 PM
JOB DESCRIPTION
Poco #1
JOB NUMBER
400-243132-1
See page two for job notes and contact information.
Pensacola FL 32514
3355 McLemore Drive
Eurofins Pensacola
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Eurofins Pensacola
Eurofins Pensacola is a laboratory within Eurofins Environment Testing Southeast, LLC, a company within Eurofins Environment Testing Group of Companies
Job Notes
This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the
samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this
page.
The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the
methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written
approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Southeast, LLC Project
Manager.
Authorization
Generated
9/19/2023 12:37:40 PM
Authorized for release by
Chad Bechtold, Project Manager
Chad.Bechtold@et.eurofinsus.com
(813)690-3563
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Table of Contents
Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Laboratory Job ID: 400-243132-1
Page 3 of 16 Eurofins Pensacola9/19/2023
Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
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Case Narrative
Client: Terraquest Environmental Consultants, PC Job ID: 400-243132-1
Project/Site: Poco #1
Job ID: 400-243132-1
Laboratory: Eurofins Pensacola
Narrative
Job Narrative
400-243132-1
Receipt
The sample was received on 9/8/2023 9:14 AM. Unless otherwise noted below, the sample arrived in good condition. The temperature of
the cooler at receipt time was 17.8°C. Thermal preservation is not performed for air samples.
Air - GC VOA
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
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Detection Summary
Job ID: 400-243132-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Client Sample ID: SVE STACK Lab Sample ID: 400-243132-1
No Detections.
Eurofins Pensacola
This Detection Summary does not include radiochemical test results.
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Sample Summary
Client: Terraquest Environmental Consultants, PC Job ID: 400-243132-1
Project/Site: Poco #1
Lab Sample ID Client Sample ID Matrix Collected Received
400-243132-1 SVE STACK Air - Tedlar Bag 09/07/23 09:55 09/08/23 09:14
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Client Sample Results
Job ID: 400-243132-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Lab Sample ID: 400-243132-1Client Sample ID: SVE STACK
Matrix: Air - Tedlar BagDate Collected: 09/07/23 09:55
Date Received: 09/08/23 09:14
Method: EPA-18 - Volatile Organic Compounds
RL MDL
125 U 313 125 ppb v/v 09/10/23 01:59 1
Analyte Dil FacAnalyzedPreparedUnitDResultQualifier
Benzene
1330 260 ppb v/v 09/10/23 01:59 1260UToluene
230 124 ppb v/v 09/10/23 01:59 1124UEthylbenzene
1150 230 ppb v/v 09/10/23 01:59 1230Um-Xylene & p-Xylene
1150 159 ppb v/v 09/10/23 01:59 1159Uo-Xylene
1150 368 ppb v/v 09/10/23 01:59 1368UXylenes, Total
1390 499 ppb v/v 09/10/23 01:59 1499UMethyl tert-butyl ether
24500 12200 ppb v/v 09/10/23 01:59 112200UGasoline Range Organics
(GRO)-C6-C10
a,a,a-Trifluorotoluene (fid)100 67-139 09/10/23 01:59 1
Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery
a,a,a-Trifluorotoluene (pid)92 09/10/23 01:59 176-127
Eurofins Pensacola
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Definitions/Glossary
Job ID: 400-243132-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Qualifiers
Air - GC VOA
Qualifier Description
U Indicates the analyte was analyzed for but not detected.
Qualifier
Glossary
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
Abbreviation
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level"
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Eurofins Pensacola
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Surrogate Summary
Job ID: 400-243132-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method: EPA-18 - Volatile Organic Compounds
Prep Type: Total/NAMatrix: Air - Tedlar Bag
Lab Sample ID Client Sample ID (67-139)(76-127)
TFT-F TFT-P
100 92400-243132-1
Percent Surrogate Recovery (Acceptance Limits)
SVE STACK
90 85MB 400-640381/13 Method Blank
Surrogate Legend
TFT-F = a,a,a-Trifluorotoluene (fid)
TFT-P = a,a,a-Trifluorotoluene (pid)
Eurofins Pensacola
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QC Association Summary
Job ID: 400-243132-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Air - GC VOA
Analysis Batch: 640381
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Air - Tedlar Bag EPA-18400-243132-1 SVE STACK Total/NA
Air - Tedlar Bag EPA-18MB 400-640381/13 Method Blank Total/NA
Eurofins Pensacola
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QC Sample Results
Job ID: 400-243132-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method: EPA-18 - Volatile Organic Compounds
Client Sample ID: Method BlankLab Sample ID: MB 400-640381/13
Matrix: Air - Tedlar Bag Prep Type: Total/NA
Analysis Batch: 640381
RL MDL
Benzene 125 U 313 125 ppb v/v 09/09/23 15:02 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResultQualifier
260 U 2601330 ppb v/v 09/09/23 15:02 1Toluene
124 U 124230 ppb v/v 09/09/23 15:02 1Ethylbenzene
230 U 2301150 ppb v/v 09/09/23 15:02 1m-Xylene & p-Xylene
159 U 1591150 ppb v/v 09/09/23 15:02 1o-Xylene
368 U 3681150 ppb v/v 09/09/23 15:02 1Xylenes, Total
499 U 4991390 ppb v/v 09/09/23 15:02 1Methyl tert-butyl ether
12200 U 1220024500 ppb v/v 09/09/23 15:02 1Gasoline Range Organics
(GRO)-C6-C10
a,a,a-Trifluorotoluene (fid)90 67-139 09/09/23 15:02 1
MB MB
Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery
85 09/09/23 15:02 1a,a,a-Trifluorotoluene (pid)76-127
Eurofins Pensacola
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Lab Chronicle
Client: Terraquest Environmental Consultants, PC Job ID: 400-243132-1
Project/Site: Poco #1
Client Sample ID: SVE STACK Lab Sample ID: 400-243132-1
Matrix: Air - Tedlar BagDate Collected: 09/07/23 09:55
Date Received: 09/08/23 09:14
Analysis EPA-18 BJ09/10/23 01:591 EET PEN640381
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Client Sample ID: Method Blank Lab Sample ID: MB 400-640381/13
Matrix: Air - Tedlar BagDate Collected: N/A
Date Received: N/A
Analysis EPA-18 BJ09/09/23 15:021 EET PEN640381
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Laboratory References:
EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001
Eurofins Pensacola
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Method Summary
Job ID: 400-243132-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method Method Description LaboratoryProtocol
EPAEPA-18 Volatile Organic Compounds EET PEN
Protocol References:
EPA = US Environmental Protection Agency
Laboratory References:
EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001
Eurofins Pensacola
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Accreditation/Certification Summary
Client: Terraquest Environmental Consultants, PC Job ID: 400-243132-1
Project/Site: Poco #1
Laboratory: Eurofins Pensacola
Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.
Authority Program Identification Number Expiration Date
North Carolina (WW/SW)State 314 12-31-23
The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which
the agency does not offer certification.
Analysis Method Prep Method Matrix Analyte
EPA-18 Air - Tedlar Bag Benzene
EPA-18 Air - Tedlar Bag Ethylbenzene
EPA-18 Air - Tedlar Bag Gasoline Range Organics (GRO)-C6-C10
EPA-18 Air - Tedlar Bag Methyl tert-butyl ether
EPA-18 Air - Tedlar Bag m-Xylene & p-Xylene
EPA-18 Air - Tedlar Bag o-Xylene
EPA-18 Air - Tedlar Bag Toluene
EPA-18 Air - Tedlar Bag Xylenes, Total
Eurofins Pensacola
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1234567
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Login Sample Receipt Checklist
Client: Terraquest Environmental Consultants, PC Job Number: 400-243132-1
Login Number: 243132
Question Answer Comment
Creator: Earnest, Tamantha
List Source: Eurofins Pensacola
List Number: 1
N/ARadioactivity wasn't checked or is </= background as measured by a survey
meter.
N/AThe cooler's custody seal, if present, is intact.
N/ASample custody seals, if present, are intact.
TrueThe cooler or samples do not appear to have been compromised or
tampered with.
N/ASamples were received on ice.Thermal preservation not required.
TrueCooler Temperature is acceptable.
TrueCooler Temperature is recorded.17.8°C IR11
TrueCOC is present.
TrueCOC is filled out in ink and legible.
TrueCOC is filled out with all pertinent information.
TrueIs the Field Sampler's name present on COC?
TrueThere are no discrepancies between the containers received and the COC.
TrueSamples are received within Holding Time (excluding tests with immediate
HTs)
TrueSample containers have legible labels.
TrueContainers are not broken or leaking.
TrueSample collection date/times are provided.
TrueAppropriate sample containers are used.
TrueSample bottles are completely filled.
N/ASample Preservation Verified.
TrueThere is sufficient vol. for all requested analyses, incl. any requested
MS/MSDs
N/AContainers requiring zero headspace have no headspace or bubble is
<6mm (1/4").
TrueMultiphasic samples are not present.
TrueSamples do not require splitting or compositing.
N/AResidual Chlorine Checked.
Eurofins Pensacola
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ANALYTICAL REPORT
PREPARED FOR
Attn: Ryan Kerins
Terraquest Environmental Consultants, PC
100 E. Ruffin Street
Mebane, North Carolina 27302
Generated 10/20/2023 1:03:06 PM
JOB DESCRIPTION
Poco #1
JOB NUMBER
400-244965-1
See page two for job notes and contact information.
Pensacola FL 32514
3355 McLemore Drive
Eurofins Pensacola
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Eurofins Pensacola
Eurofins Pensacola is a laboratory within Eurofins Environment Testing Southeast, LLC, a company within Eurofins Environment Testing Group of Companies
Job Notes
This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the
samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this
page.
The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the
methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written
approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Southeast, LLC Project
Manager.
Authorization
Generated
10/20/2023 1:03:06 PM
Authorized for release by
Chad Bechtold, Project Manager
Chad.Bechtold@et.eurofinsus.com
(813)690-3563
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Table of Contents
Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Laboratory Job ID: 400-244965-1
Page 3 of 16 Eurofins Pensacola10/20/2023
Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
QC Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
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Case Narrative
Client: Terraquest Environmental Consultants, PC Job ID: 400-244965-1
Project/Site: Poco #1
Job ID: 400-244965-1
Laboratory: Eurofins Pensacola
Narrative
Job Narrative
400-244965-1
Analytical test results meet all requirements of the associated regulatory program listed on the Accreditation/Certification Summary Page
unless otherwise noted under the individual analysis. Data qualifiers are applied to indicate exceptions. Noncompliant quality control
(QC) is further explained in narrative comments.
Matrix QC may not be reported if insufficient sample or site-specific QC samples were not submitted. In these situations, to
demonstrate precision and accuracy at a batch level, a LCS/LCSD may be performed, unless otherwise specified in the method.
Surrogate and/or isotope dilution analyte recoveries (if applicable) which are outside of the QC window are confirmed unless attributed
to a dilution or otherwise noted in the narrative.
Regulated compliance samples (e.g. SDWA, NPDES) must comply with the associated agency requirements/permits.
Receipt
The sample was received on 10/13/2023 9:19 AM. Unless otherwise noted below, the sample arrived in good condition, and, where
required, properly preserved and on ice. The temperature of the cooler at receipt time was 19.8°C
Air - GC VOA
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.
Eurofins PensacolaPage 4 of 16 10/20/2023
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Detection Summary
Job ID: 400-244965-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Client Sample ID: SVE STACK Lab Sample ID: 400-244965-1
m-Xylene & p-Xylene
RL
1150 ppb v/v
MDL
230
Analyte Result Qualifier Unit Dil Fac D Method Prep Type
Total/NA1J301EPA-18
o-Xylene 1150 ppb v/v159 Total/NA1413JEPA-18
Xylenes, Total 1150 ppb v/v368 Total/NA1714JEPA-18
Gasoline Range Organics
(GRO)-C6-C10
24500 ppb v/v12200 Total/NA131600EPA-18
Eurofins Pensacola
This Detection Summary does not include radiochemical test results.
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Sample Summary
Client: Terraquest Environmental Consultants, PC Job ID: 400-244965-1
Project/Site: Poco #1
Lab Sample ID Client Sample ID Matrix Collected Received
400-244965-1 SVE STACK Air - Tedlar Bag 10/12/23 13:50 10/13/23 09:19
Eurofins PensacolaPage 6 of 16 10/20/2023
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Client Sample Results
Job ID: 400-244965-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Lab Sample ID: 400-244965-1Client Sample ID: SVE STACK
Matrix: Air - Tedlar BagDate Collected: 10/12/23 13:50
Date Received: 10/13/23 09:19
Method: EPA-18 - Volatile Organic Compounds
RL MDL
125 U 313 125 ppb v/v 10/13/23 15:34 1
Analyte Dil FacAnalyzedPreparedUnitDResultQualifier
Benzene
1330 260 ppb v/v 10/13/23 15:34 1260UToluene
230 124 ppb v/v 10/13/23 15:34 1124UEthylbenzene
1150 230 ppb v/v 10/13/23 15:34 1301Jm-Xylene & p-Xylene
1150 159 ppb v/v 10/13/23 15:34 1413Jo-Xylene
1150 368 ppb v/v 10/13/23 15:34 1714JXylenes, Total
1390 499 ppb v/v 10/13/23 15:34 1499UMethyl tert-butyl ether
24500 12200 ppb v/v 10/13/23 15:34 131600Gasoline Range Organics
(GRO)-C6-C10
a,a,a-Trifluorotoluene (fid)88 67-139 10/13/23 15:34 1
Surrogate Dil FacAnalyzedPreparedQualifierLimits%Recovery
a,a,a-Trifluorotoluene (pid)86 10/13/23 15:34 176-127
Eurofins Pensacola
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Definitions/Glossary
Job ID: 400-244965-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Qualifiers
Air - GC VOA
Qualifier Description
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.
Qualifier
U Indicates the analyte was analyzed for but not detected.
Glossary
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
Abbreviation
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference)
Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample
DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level"
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown)
NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
RL Reporting Limit or Requested Limit (Radiochemistry)
RPD Relative Percent Difference, a measure of the relative difference between two points
TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Eurofins Pensacola
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Surrogate Summary
Job ID: 400-244965-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method: EPA-18 - Volatile Organic Compounds
Prep Type: Total/NAMatrix: Air - Tedlar Bag
Lab Sample ID Client Sample ID (67-139)(76-127)
TFT-F TFT-P
88 86400-244965-1
Percent Surrogate Recovery (Acceptance Limits)
SVE STACK
89 88LCS 400-645423/1001 Lab Control Sample
85 86MB 400-645423/2 Method Blank
Surrogate Legend
TFT-F = a,a,a-Trifluorotoluene (fid)
TFT-P = a,a,a-Trifluorotoluene (pid)
Eurofins Pensacola
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QC Association Summary
Job ID: 400-244965-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Air - GC VOA
Analysis Batch: 645423
Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch
Air - Tedlar Bag EPA-18400-244965-1 SVE STACK Total/NA
Air - Tedlar Bag EPA-18MB 400-645423/2 Method Blank Total/NA
Air - Tedlar Bag EPA-18LCS 400-645423/1001 Lab Control Sample Total/NA
Eurofins Pensacola
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QC Sample Results
Job ID: 400-244965-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method: EPA-18 - Volatile Organic Compounds
Client Sample ID: Method BlankLab Sample ID: MB 400-645423/2
Matrix: Air - Tedlar Bag Prep Type: Total/NA
Analysis Batch: 645423
RL MDL
Benzene 125 U 313 125 ppb v/v 10/13/23 09:42 1
MB MB
Analyte Dil FacAnalyzedPreparedDUnitResultQualifier
260 U 2601330 ppb v/v 10/13/23 09:42 1Toluene
124 U 124230 ppb v/v 10/13/23 09:42 1Ethylbenzene
230 U 2301150 ppb v/v 10/13/23 09:42 1m-Xylene & p-Xylene
159 U 1591150 ppb v/v 10/13/23 09:42 1o-Xylene
368 U 3681150 ppb v/v 10/13/23 09:42 1Xylenes, Total
499 U 4991390 ppb v/v 10/13/23 09:42 1Methyl tert-butyl ether
12200 U 1220024500 ppb v/v 10/13/23 09:42 1Gasoline Range Organics
(GRO)-C6-C10
a,a,a-Trifluorotoluene (fid)85 67-139 10/13/23 09:42 1
MB MB
Surrogate Dil FacPreparedAnalyzedQualifierLimits%Recovery
86 10/13/23 09:42 1a,a,a-Trifluorotoluene (pid)76-127
Client Sample ID: Lab Control SampleLab Sample ID: LCS 400-645423/1001
Matrix: Air - Tedlar Bag Prep Type: Total/NA
Analysis Batch: 645423
Benzene 15700 15690 ppb v/v 100 85 -115
Analyte
LCS LCS
DUnitResultQualifier %Rec
Spike
Added
%Rec
Limits
Toluene 13300 12980 ppb v/v 98 85 -115
Ethylbenzene 11500 11780 ppb v/v 102 85 -115
m-Xylene & p-Xylene 23000 23340 ppb v/v 101 85 -115
o-Xylene 11500 10310 ppb v/v 90 85 -115
Xylenes, Total 34500 33650 ppb v/v 97 85 -115
Methyl tert-butyl ether 13900 12300 ppb v/v 89 85 -115
Gasoline Range Organics
(GRO)-C6-C10
147000 150500 ppb v/v 103 85 -115
a,a,a-Trifluorotoluene (fid)67 -139
Surrogate
89
LCS LCS
Qualifier Limits%Recovery
88a,a,a-Trifluorotoluene (pid)76 -127
Eurofins Pensacola
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Lab Chronicle
Client: Terraquest Environmental Consultants, PC Job ID: 400-244965-1
Project/Site: Poco #1
Client Sample ID: SVE STACK Lab Sample ID: 400-244965-1
Matrix: Air - Tedlar BagDate Collected: 10/12/23 13:50
Date Received: 10/13/23 09:19
Analysis EPA-18 SRK10/13/23 15:341 EET PEN645423
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Client Sample ID: Method Blank Lab Sample ID: MB 400-645423/2
Matrix: Air - Tedlar BagDate Collected: N/A
Date Received: N/A
Analysis EPA-18 SRK10/13/23 09:421 EET PEN645423
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Client Sample ID: Lab Control Sample Lab Sample ID: LCS 400-645423/1001
Matrix: Air - Tedlar BagDate Collected: N/A
Date Received: N/A
Analysis EPA-18 SRK10/13/23 08:421 EET PEN645423
Type
Batch
Method
Batch
Prep Type LabAnalystRun
Prepared
or Analyzed
Initial
Amount Amount
Final Batch
NumberFactor
Dil
Total/NA 5 mL 5 mL
Laboratory References:
EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001
Eurofins Pensacola
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Method Summary
Job ID: 400-244965-1Client: Terraquest Environmental Consultants, PC
Project/Site: Poco #1
Method Method Description LaboratoryProtocol
EPAEPA-18 Volatile Organic Compounds EET PEN
Protocol References:
EPA = US Environmental Protection Agency
Laboratory References:
EET PEN = Eurofins Pensacola, 3355 McLemore Drive, Pensacola, FL 32514, TEL (850)474-1001
Eurofins Pensacola
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Accreditation/Certification Summary
Client: Terraquest Environmental Consultants, PC Job ID: 400-244965-1
Project/Site: Poco #1
Laboratory: Eurofins Pensacola
Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.
Authority Program Identification Number Expiration Date
North Carolina (WW/SW)State 314 12-31-23
The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes
for which the agency does not offer certification.
Analysis Method Prep Method Matrix Analyte
EPA-18 Air - Tedlar Bag Benzene
EPA-18 Air - Tedlar Bag Ethylbenzene
EPA-18 Air - Tedlar Bag Gasoline Range Organics (GRO)-C6-C10
EPA-18 Air - Tedlar Bag Methyl tert-butyl ether
EPA-18 Air - Tedlar Bag m-Xylene & p-Xylene
EPA-18 Air - Tedlar Bag o-Xylene
EPA-18 Air - Tedlar Bag Toluene
EPA-18 Air - Tedlar Bag Xylenes, Total
Eurofins Pensacola
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Login Sample Receipt Checklist
Client: Terraquest Environmental Consultants, PC Job Number: 400-244965-1
Login Number: 244965
Question Answer Comment
Creator: Perez, Trina M
List Source: Eurofins Pensacola
List Number: 1
N/ARadioactivity wasn't checked or is </= background as measured by a survey
meter.
TrueThe cooler's custody seal, if present, is intact.
N/ASample custody seals, if present, are intact.
TrueThe cooler or samples do not appear to have been compromised or
tampered with.
N/ASamples were received on ice.
TrueCooler Temperature is acceptable.
TrueCooler Temperature is recorded.19.8°C IR-10
TrueCOC is present.
TrueCOC is filled out in ink and legible.
TrueCOC is filled out with all pertinent information.
TrueIs the Field Sampler's name present on COC?
TrueThere are no discrepancies between the containers received and the COC.
TrueSamples are received within Holding Time (excluding tests with immediate
HTs)
TrueSample containers have legible labels.
TrueContainers are not broken or leaking.
TrueSample collection date/times are provided.
TrueAppropriate sample containers are used.
TrueSample bottles are completely filled.
N/ASample Preservation Verified.
TrueThere is sufficient vol. for all requested analyses, incl. any requested
MS/MSDs
N/AContainers requiring zero headspace have no headspace or bubble is
<6mm (1/4").
TrueMultiphasic samples are not present.
TrueSamples do not require splitting or compositing.
N/AResidual Chlorine Checked.
Eurofins Pensacola
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APPENDIX E