HomeMy WebLinkAboutWA-1141_13374_CA_RPTS_20210329_MRP
3502 Hayes Road • Monroe, North Carolina 28110
113 West Firetower Road, Suite G • Winterville, North Carolina 28590
Phone (704) 845-4010 • (888) 870-4133 • Fax (704) 845-4012
March 29, 2021
Mr. Jared Edwards
North Carolina Department of
Environmental Quality
Washington Regional Office
943 Washington Square Mall
Washington, North Carolina 27889
Re: Ground Water Monitoring Report
February 2021
Gurganus Mobil
277 US Highway 64W
Plymouth, Washington County
North Carolina
Facility ID Number: 0-00-0000006307
Incident Number: 13374
GRI Project No. 2461
Dear Mr. Edwards,
Please find enclosed the referenced report, for the above mentioned site.
If you have any questions, please contact William Regenthal at 704-845-4010.
Sincerely,
Geological Resources, Inc.
Leslie Maxtone-Graham
Administrative Assistant
Enclosure
Cc: Ms. Bea Harrison; North East Oil Company, Inc. file
3502 Hayes Road • Monroe, North Carolina 28110
113 West Firetower Road, Suite G • Winterville, North Carolina 28590
Phone (704) 845-4010 • (888) 870-4133 • Fax (704) 845-4012
Ground Water Monitoring Report
February 2021
Gurganus Mobil
277 US Highway 64 W
Plymouth, Washington County
North Carolina
Facility ID Number: 0-00-0000006307
Incident Number: 13374
GRI Project Number: 2461
Prepared for:
Mr. C. Wood Beasley, III
North East Oil Company, Inc.
Post Office Box 1386
Ahoskie, North Carolina 27910
March 29, 2021
William Regenthal, P. G.
Project Manager
Lisa Weathersby
Report Writer
___________________________________________________________________________________________
Prepared by: Geological Resources, Inc. Ground Water Monitoring Report
Prepared on: March 29, 2021 Gurganus Mobil
Project Manager: William Regenthal, P. G. GRI Project No. 2461
i
SITE INFORMATION
1. Site Identification
ú Gurganus Mobil (Facility ID 0-00-0000006307)
ú Incident Number 13374 – Intermediate Risk (I185D)
ú Location of Source Area: 277 US Highway 64 W
Plymouth, NC 28314
Washington County
35.8557698°N, 76.749449°W (Topographical Map)
2. Information about Contacts Associated with the Leaking UST System
UST Owner
North East Oil Company, Inc.
Post Office Box 1386
Ahoskie, NC 27910
beah@bent-prises.com
252-398-6022
UST Operator
North East Oil Company, Inc.
Post Office Box 1386
Ahoskie, NC 27910
beah@bent-prises.com
252-398-6022
Consultant/Contractor
Geological Resources, Inc.
3502 Hayes Road
Monroe, NC 28110
wlr@geologicalresourcesinc.com
704-845-4010
Property Owner
Raemona L. McCray
539 Marriner Road
Roper, NC 27970
Email Unknown
252-217-7664
Analytical Laboratory
SGS North America, Inc.
4405 Vineland Road, Suite C-15
Orlando, FL 32811
State Certification No. 573
407-425-6700
Property Occupant
Vacant
3. Information about Release
ú Release was discovered in November 1994
ú An unknown amount of product was released from the leaking UST System
ú Five 4,000-gallon gasoline USTs were removed from the site in November 1994
___________________________________________________________________________________________
Prepared by: Geological Resources, Inc. Ground Water Monitoring Report
Prepared on: March 29, 2021 Gurganus Mobil
Project Manager: William Regenthal, P. G. GRI Project No. 2461
ii
EXECUTIVE SUMMARY
The former Gurganus Mobil site is located at 277 US Highway 64 W in Plymouth, Washington County,
North Carolina. The site is currently owned by Raemona L. McCray and was formerly operated by North
East Oil Company as a petroleum retail facility. The site is currently vacant. Five 4,000-gallon USTs were
removed from the site in November 1994. The adjoining properties are a mixture of multi-family
residential, single family residential, and commercial properties. According to the information
determined during receptor survey activities, a potable water supply well was identified within 1,000 feet
of the site, however, the well appears to be up-gradient of the release. Public water is available to the
site and surrounding properties within a 1,500-foot radius of the site.
A Corrective Action Plan has not been completed for the incident.
Between November 6 and 15, 2019, soil excavation activities were performed in the areas of MW-1, MW-
2, MW-3 and MW-4. A total of 736.14 tons of contaminated soil were removed from the site in November
2019. A total of 239.66 tons of overburden soil were surveyed and returned to the excavation area as
backfill.
On February 23, 2021, five Type II monitoring wells (MW-1R through MW-4R and MW-13) were gauged,
purged and sampled per NCDEQ guidelines. No free product was observed in the monitoring wells prior
to sampling. Concentrations of individual BTEX constituents, MTBE, naphthalene, isopropylbenzene, di-
isopropyl ether, n-propylbenzene, 1,2,4-trimethylbenzene and/or 1,3,5-trimethylbenzene that exceeded
the Maximum Allowable Concentrations (MACs) as specified in T15A NCAC 2L.0202 were reported in the
ground water samples collected from MW-1R through MW-4R and MW-13. Concentrations of benzene
that exceeded the Gross Contamination Level (GCL) were reported in the ground water samples collected
from MW-3R and MW-4R.
The total contaminant mass has increased by approximately 25% since the January 2020 ground water
sampling event.
Based on this information, semi-annual ground water sampling should continue at the site until
contaminant concentrations are reduced to below the GCLs. The next ground water sampling event is
tentatively scheduled for August 2021. A Mobile Multi Phase Extraction event could be conducted at the
site in order to reduce contaminant mass in the area of the November 2019 excavation basin.
___________________________________________________________________________________________
Prepared by: Geological Resources, Inc. Ground Water Monitoring Report
Prepared on: March 29, 2021 Gurganus Mobil
Project Manager: William Regenthal, P. G. GRI Project No. 2461
TABLE OF CONTENTS
SITE INFORMATION ............................................................................................................................ i
EXECUTIVE SUMMARY ....................................................................................................................... ii
1.0 SITE HISTORY AND CHARACTERIZATION ...................................................................................1
2.0 PRESENTATION OF CURRENT SITE ASSESSMENT INFORMATION/ COMPARISON TO HISTORICAL
ASSESSMENT INFORMATION ...................................................................................................2
3.0 FREE PRODUCT REMOVAL ........................................................................................................3
4.0 NATURAL ATTENUATION / NATURAL SOURCE ZONE DEPLETION STATUS ..................................3
5.0 CONCLUSIONS .........................................................................................................................3
6.0 LIMITATIONS ...........................................................................................................................4
7.0 STATEMENTS AND CERTIFICATION ...........................................................................................4
FIGURES
Figure 1: Site Location Map
Figure 2: Site Map
Figure 3: Site Vicinity Map
Figure 4: Water Table Surface Map
Figure 5: Ground Water Quality Map
Figure 6: Contaminant Mass Area Map
TABLES
Table 1: UST Owner and Operator Information
Table 2: UST System Information
Table 3: Adjacent Property Owner Information
Table 4: Water Supply Well Information
Table 5: Well Construction and Gauging Information
Table 6: Summary of Ground Water Sample Analytical Results
APPENDICES
Appendix A: State Correspondence
Appendix B: Laboratory Report – Ground Water Samples
Appendix C: Contaminant Mass Calculations
___________________________________________________________________________________________
Prepared by: Geological Resources, Inc. Ground Water Monitoring Report
Prepared on: March 29, 2021 Gurganus Mobil
Project Manager: William Regenthal, P. G. GRI Project No. 2461
1
1.0 SITE HISTORY AND CHARACTERIZATION
Geological Resources, Inc. (GRI) presents the results of the February 2021 ground water sampling event
at the Gurganus Mobil site. The site is located at 277 US Highway 64 W in Plymouth, Washington County,
North Carolina (Figure 1). These activities were conducted in accordance with GRI Proposal No. 21-021,
which was submitted to the North Carolina Department of Environmental Quality (NCDEQ) on January 8,
2021, and was approved as Task Authorization No. 13374-24 on January 11, 2021. State correspondence
has been included as Appendix A.
The site is currently owned by Raemona L. McCray and was formerly operated by North East Oil Company,
Inc. as a petroleum retail facility. The property is now vacant. Five 4,000-gallon gasoline USTs were
removed from the site in November 1994, confirming a release. UST owner/operator information and
UST system information are included as Tables 1 and 2, respectively. The Registered Tank Report is shown
below:
The site and surrounding area are a mixture of multi-family residential, single family residential, and
commercial properties. The site contains one building and is primarily capped with grass, concrete and
asphalt. The overall topography at the site is relatively flat. Twenty-six Type II monitoring wells (MW-1
through MW-5 and MW-7 through MW-27) and two Type III monitoring wells (MWD-6 and TW-1) were
installed at the site during previous ground water assessment activities. A Site Map showing the locations
of the monitoring wells and the structures on-site has been included as Figure 2.
On August 8, 2014, GRI personnel conducted an updated receptor survey at the site. Two water supply
wells (WSW-1 and WSW-3) were identified within a 1,500-foot radius of the site. One potable water
supply well (WSW-1) was identified within 1,000 feet of the site, however, the well appears to be up-
gradient of the release. One previously identified water supply well (WSW-2) was found to have been
___________________________________________________________________________________________
Prepared by: Geological Resources, Inc. Ground Water Monitoring Report
Prepared on: March 29, 2021 Gurganus Mobil
Project Manager: William Regenthal, P. G. GRI Project No. 2461
2
destroyed prior to the August 2014 updated receptor survey activities. Municipal water is available to the
site and surrounding properties. No surface water bodies were identified within a 500-foot radius of the
site. The site lies within the designated wellhead protection area for the Town of Plymouth. Adjacent
property owner information is presented in Table 3. Water supply well owner information is presented
in Table 4. A Site Vicinity Map showing the adjacent properties and locations of water supply wells has
been included as Figure 3.
During the November 2019 soil excavation, a total of 736.14 tons of contaminated soil was removed from
the site. Approximately 239.66 tons of overburden soil was returned to the excavation basin as backfill.
Additionally, clean backfill was used to fill the excavation basin to grade. Asphalt was then paved on top
of the excavation area.
A Corrective Action Plan has not been developed for this incident.
2.0 PRESENTATION OF CURRENT SITE ASSESSMENT INFORMATION/ COMPARISON TO HISTORICAL
ASSESSMENT INFORMATION
On February 23, 2021, five Type II monitoring wells (MW-1R through MW-4R and MW-13) gauged, purged
and sampled per NCDEQ guidelines. Please note, MW-5 was not located and is assumed to have been
destroyed during the November 2019 excavation activities. No free product was observed during the
February 2021 ground water sampling activities. Depths to ground water in the Type II monitoring wells
ranged from 2.34 feet to 3.09 feet below the tops of well casings. Ground water elevations in the Type II
monitoring wells ranged from 96.74 feet to 98.32 feet. Ground water flow was generally to the southeast
with a horizontal gradient of approximately 0.01 feet per foot. The vertical gradient was not calculated,
since MWD-6 and TW-1 have been destroyed and/or abandoned. Well construction and gauging
information is presented in Table 5. A Water Table Surface Map based on the Type II monitoring wells is
included as Figure 4. A summary of the current ground water gauging data is shown below:
Well ID
Screened
Interval
(x to y ft.
BGS)
Bottom
of Well
(ft. BGS)
Top of
Casing
Elevation
(ft.)
Depth to
Water from
Top of Casing
(feet)
Free
Product
Thickness
(ft.)
Ground
Water
Elevation
(ft.)
MW-1R 4 - 9 9 100.18 2.92 --- 97.26
MW-2R 4 - 9 9 100.84 2.52 --- 98.32
MW-3R 4 - 9 9 100.83 2.79 --- 98.04
MW-4R 4 - 9 9 99.93 3.09 --- 96.84
MW-13 5 - 15 15 99.08 2.34 --- 96.74
Ground water samples collected from the monitoring wells were submitted for laboratory analyses using
EPA Method 6200B. Concentrations of individual BTEX constituents, MTBE, naphthalene,
isopropylbenzene, di-isopropyl ether, n-propylbenzene, 1,2,4-trimethylbenzene and/or 1,3,5-
trimethylbenzene that exceeded the Maximum Allowable Concentrations (MACs) as specified in T15A
NCAC 2L.0202 were reported in the ground water samples collected from MW-1R through MW-4R and
MW-13. Concentrations of benzene that exceeded the Gross Contamination Level (GCL) were reported
___________________________________________________________________________________________
Prepared by: Geological Resources, Inc. Ground Water Monitoring Report
Prepared on: March 29, 2021 Gurganus Mobil
Project Manager: William Regenthal, P. G. GRI Project No. 2461
3
in the ground water samples collected from MW-3R and MW-4R. A summary of the analytical results for
ground water samples collected on February 23, 2021, is presented in Table 6. A Ground Water Quality
Map based on the February 2021 data is included as Figure 5. A complete report of laboratory analyses
of the ground water samples collected from the monitoring wells during the February 2021 sampling
event has been included as Appendix B. A summary of the current ground water analytical data is shown
below:
Contaminant
of Concern Benzene Toluene Ethylbenzene Xylenes MTBE Naphthalene Well
ID
MACs (mg/l) 1 600 600 500 20 6
GCL (mg/l) 5,000 260,000 84,500 85,500 20,000 6,000
MW-1R 608 5.2 J 838 760 6.7 J 145
MW-2R 2.6 0.14 J 5.7 0.47 J <0.13 1.6
MW-3R 5,170 24,400 3,500 17,900 <130 648
MW-4R 5,270 28.8 J 2,870 879 64.5 J 833
MW-13 978 14.2 178 949 5.0 J 56.0
The baseline contaminant mass at the site was determined based on the total BTEX, MTBE and
naphthalene concentrations from the January 2020 ground water sampling event as well as the maximum
historical water column height observed in the excavation area. The total contaminant mass at the site
has increased by 25% since January 2020. Contaminant mass calculations have been included as Appendix
C. A map of the contaminant mass area has been included as Figure 6. A chart depicting the overall trend
in contaminant mass is shown below:
___________________________________________________________________________________________
Prepared by: Geological Resources, Inc. Ground Water Monitoring Report
Prepared on: March 29, 2021 Gurganus Mobil
Project Manager: William Regenthal, P. G. GRI Project No. 2461
4
The site is located in the Coastal Plain Physiographic Province of North Carolina. The water table has a
seasonal high depth to water of approximately four to six feet below ground surface (bgs).
3.0 FREE PRODUCT REMOVAL
Free product has historically been present in MW-1 through MW-4. Five MMPE events were conducted
at the site between December 2008 and May 2015. A total of 79,039.65 gallons of fluids, including
1,133.40 gallons of liquid and vapor phase free product have been recovered during past MMPE events.
Free product was not detected at the site during the current gauging and sampling event.
4.0 NATURAL ATTENUATION / NATURAL SOURCE ZONE DEPLETION STATUS
MMPE and soil excavation events have been conducted at the site as the primary method of corrective
action. Since a CAP has not been developed for the incident, no natural attenuation monitoring plan is
currently in place at the site.
5.0 CONCLUSIONS
· On February 23, 2021, five Type II monitoring wells were gauged, purged and sampled. Please
note, MW-5 was not located and is assumed to have been destroyed during the November 2019
soil excavation activities. Free product was not observed. Ground water flow was generally to
the southeast with a horizontal gradient of approximately 0.01 feet per foot.
· Concentrations of individual BTEX constituents, MTBE, naphthalene, isopropylbenzene, di-
isopropyl ether, n-propylbenzene, 1,2,4-trimethylbenzene and/or 1,3,5-trimethylbenzene that
exceeded the MACs were reported in the ground water samples collected from MW-1R through
MW-4R and MW-13. A concentration of benzene that exceeded the GCL was reported in the
ground water samples collected from MW-3R and MW-4R.
· The contaminant mass at the site has increased by 25% since January 2020.
· Based on this information, the risk classification for the site should remain intermediate risk. The
soil excavation activities appear to have been successful in removing free product from the site.
· Semi-annual ground water sampling should continue at the site until contaminant concentrations
are reduced to below the GCLs. The next sampling event is tentatively scheduled for August 2021.
A Mobile Multi Phase Extraction event could be conducted at the site in order to continue to
reduce the contaminant mass in the vicinity of the November 2019 excavation basin.
6.0 LIMITATIONS
This report has been prepared for the exclusive use of North East Oil Company, Inc. for specific application
to the referenced site in Washington County, North Carolina. The assessment was conducted based on
the scope of work and level of effort desired by NCDEQ and with resources adequate only for that scope
of work. Our findings have been developed in accordance with generally accepted standards of
environmental practices in the State of North Carolina, available information, and our professional
judgment. No other warranty is expressed or implied.
The data that are presented in this report are indicative of conditions that existed at the precise locations
sampled and at the time the samples were collected. In addition, the data obtained from samples would
FIGURES
TABLES
UST ID Number 1-5 Facility ID Number
Owner or Operator?
Owner
Name of Owner or Operator Dates of Ownership / Operation
TABLE 1
UST OWNER/OPERATOR INFORMATION
GURGANUS MOBIL (INCIDENT NO. 13374)
00-0-006307
E T Six, Inc. 03/08/1965 - 11/21/1994
Address Telephone Number
Post Office Box 1386, Ahoskie, NC 27910 252-862-0236
Page 1 of 1
Date: 11/05/19
Was Release
Associated
with UST
System?
(Yes / No)
1 Gasoline 4,000 03/08/1965 Single Wall Steel 64" x 24' Single Wall Steel
Removed
(11/21/1994)Yes
2 Gasoline 4,000 03/08/1965 Single Wall Steel 64" x 24' Single Wall Steel
Removed
(11/21/1994)Yes
3 Gasoline 4,000 03/08/1965 Single Wall Steel 64" x 24' Single Wall Steel
Removed
(11/21/1994)Yes
4 Gasoline 4,000 03/08/1965 Single Wall Steel 64" x 24' Single Wall Steel
Removed
(11/21/1994)Yes
5 Gasoline 4,000 03/08/1965 Single Wall Steel 64" x 24' Single Wall Steel
Removed
(11/21/1994)Yes
TABLE 2
UST SYSTEM INFORMATION
GURGANUS MOBIL (INCIDENT NO. 13374)
Facility ID #: 0-006307
UST
ID
No.
Current
or Most
Recent
Contents
Capacity
(gallons)
Date
Installed
Construction
Details
Tank
Dimensions
Description of
Associated
Product Piping
and
Pumps
Status
of
UST
Page 1 of 1
Date: 02/05/2020
Raemona Lizzette McCray
Kenneth D. & Patricia B. Futrell
Pine Forest NC, LLC
Roadtrip Motel, LLC
Quality Oil Company, LLC.
Little, Dickenson & Spruill
Note:
• Properties are keyed to Figure 3.
6767-74-1121 241 US Highway 64, West
Plymouth, NC 27962
6767-64-7197 1540 Silas Creek Parkway
Winston-Salem, NC 27127
6767-64-6052 1363 Brunswick Avenue
Norfolk, VA 23508
6767-63-9999 (SITE)539 Marriner Road
Roper, NC 27970
6767-63-9806 2931 US Highway 32, South
Plymouth, NC 27962
6767-73-2758 2021 Cross Beam Drive
Charlotte, NC 28217
TABLE 3
ADJACENT PROPERTY OWNERS
GURGANUS MOBIL (INCIDENT NO. 13374)
Tax Parcel Number/ Map ID Owner/ Occupant Name
(Last , First MI)Address
Facility ID # : 0-006307
Date : 02/05/2020
Well ID. Parcel ID No. Well Owner Address
Phone
Number
Well Use
(Potable/Agricultural,
etc.)
Well
Depth
(ft. BGS)
Type of Well
(Drilled/
Bored)
Well Casing
Depth
(ft. BGS)
Well Screen
Interval
(x to y ft. BGS)
Distance from
source area of
release
(ft.)
WSW-1 6767-63-7158 Odessa Yanisha Mann
319 West Avenue
Plymouth, NC 27962 NA Potable NA NA NA NA ~815 S
WSW-2 6767-73-2245 Billy R. and Sharon W. Maitland
Post Office Box 145
Creswell, NC 27928 NA Destroyed NA NA NA NA ~760 S
WSW-3 6767-74-9771 Donnie William Tenney
2009 S Shore Drive
Surf City, NC 28445 NA Non-Potable NA NA NA NA ~1,180 NE
• ft. BGS: Feet below ground surface.
Facility ID #: 0-006307
TABLE 4
WATER SUPPLY WELL INFORMATION
GURGANUS MOBIL (INCIDENT NO. 13374)
Note:
• Water supply wells are keyed to Figure 3.
• NA: Data not available.
Page 1 of 1
04/22/08 6.38 0.00 93.6212/07/08 7.54 0.04 92.49 Pre-MMPE12/11/08 8.04 0.03 91.99 Post-MMPE12/23/08 7.30 0.02 92.7202/08/10 5.23 2.79 97.16 Pre-MMPE02/12/10 5.90 0.00 94.10 Post-MMPE03/17/10 6.00 3.09 96.6510/11/10 6.32 0.57 94.17 Pre-MMPE10/15/10 6.87 0.00 93.13 Post-MMPE06/26/12 5.95 0.17 94.2010/15/13 6.26 0.76 94.3908/04/14 6.45 0.30 93.81 Pre-MMPE08/08/14 6.56 0.00 93.44 Post-MMPE05/18/15 5.99 1.08 94.94 Pre-MMPE05/22/15 7.02 0.00 92.98 Post-MMPE06/17/15 5.79 0.14 94.3304/02/18 6.07 1.52 95.2310/03/18 5.88 0.72 94.7411/06/19 6.30 0.00 93.70 Destroyed01/27/20 6.20 0.00 93.9808/17/20 5.27 0.00 94.9102/23/21 2.92 0.00 97.2604/22/08 6.40 0.00 93.5612/07/08 7.50 0.03 92.49 Pre-MMPE12/11/08 7.95 0.02 92.03 Post-MMPE12/23/08 7.25 0.05 92.7502/08/10 3.14 0.09 96.90 Pre-MMPE02/12/10 6.13 0.00 93.83 Post-MMPE03/17/10 3.50 0.00 96.4610/11/10 5.77 0.00 94.19 Pre-MMPE10/15/10 6.85 0.00 93.11 Post-MMPE06/26/12 6.00 0.27 94.1910/15/13 5.98 0.37 94.3008/04/14 6.22 0.09 93.82 Pre-MMPE08/08/14 6.50 0.00 93.46 Post-MMPE05/18/15 5.26 0.26 94.92 Pre-MMPE05/22/15 7.16 0.00 92.80 Post-MMPE06/17/15 5.67 0.06 94.3404/02/18 5.06 0.34 95.1910/03/18 5.53 0.40 94.7711/06/19 6.28 0.00 93.68 Destroyed01/27/20 5.64 0.00 95.2008/17/20 4.59 0.00 96.2502/23/21 2.52 0.00 98.3204/22/08 6.40 0.00 93.5212/07/08 7.50 0.02 92.44 Pre-MMPE12/11/08 8.00 0.00 91.92 Post-MMPE12/23/08 7.27 0.03 92.6802/08/10 3.25 0.00 96.67 Pre-MMPE02/12/10 NM NM NM Post-MMPE03/17/10 3.95 0.39 96.3010/11/10 5.75 0.00 94.17 Pre-MMPE10/15/10 6.83 0.00 93.09 Post-MMPE06/26/12 5.92 0.07 94.0610/15/13 5.87 0.06 94.1008/04/14 6.37 0.07 93.61 Pre-MMPE08/08/14 6.62 0.00 93.30 Post-MMPE05/18/15 5.57 0.64 94.90 Pre-MMPE05/22/15 7.04 0.00 92.88 Post-MMPE06/17/15 5.83 0.24 94.3004/02/18 5.14 0.38 95.1110/03/18 5.09 0.02 94.8511/06/19 6.33 0.03 93.62 Destroyed01/27/20 5.65 0.00 95.1808/17/20 5.29 0.00 95.5402/23/21 2.79 0.00 98.04
100.849.04 - 9401/27/20MW-2R
100.189.04 - 9401/27/20MW-1R
05/29/96MW-2 99.968.53.5 - 8.53.5
Bottom
of Well
(ft. BGS)
3.505/29/96MW-1
100.839.04 - 94
TABLE 5
WELL CONSTRUCTION AND GAUGING INFORMATION
GURGANUS MOBIL (INCIDENT NO. 13374)
Date: 03/09/2021 Facility ID # : 0-006307
100.008.53.5 - 8.5
Top of
Casing
Elevation*
(ft.)
Depth to
Water from
Top of Casing
(ft.)
Free Product
Thickness**
(ft.)
Ground
Water
Elevation*
(ft.)
CommentsWell
ID
Date
Installed
(m/dd/yy)
Date Water
Level
Measured
(mm/dd/yy)
Well
Casing
Depth
(ft. BGS)
Screened
Interval
(x to y ft.
BGS)
05/29/96MW-3 99.928.53.5 - 8.53.5
01/27/20MW-3R
Page 1 of 4
Bottom
of Well
(ft. BGS)
TABLE 5
WELL CONSTRUCTION AND GAUGING INFORMATION
GURGANUS MOBIL (INCIDENT NO. 13374)
Date: 03/09/2021 Facility ID # : 0-006307
Top of
Casing
Elevation*
(ft.)
Depth to
Water from
Top of Casing
(ft.)
Free Product
Thickness**
(ft.)
Ground
Water
Elevation*
(ft.)
CommentsWell
ID
Date
Installed
(m/dd/yy)
Date Water
Level
Measured
(mm/dd/yy)
Well
Casing
Depth
(ft. BGS)
Screened
Interval
(x to y ft.
BGS)
04/22/08 NM NM NM Not Located12/07/08 7.16 0.02 92.45 Pre-MMPE12/11/08 7.77 0.00 91.82 Post-MMPE12/23/08 6.93 0.03 92.6902/08/10 2.81 0.00 96.78 Pre-MMPE02/12/10 NM NM NM Post-MMPE03/17/10 3.20 0.00 96.3910/11/10 5.48 0.00 94.11 Pre-MMPE10/15/10 6.28 0.00 93.31 Post-MMPE06/26/12 5.54 0.00 94.0510/15/13 5.52 0.00 94.0705/18/15 4.79 0.10 94.89 Pre-MMPE05/22/15 4.87 0.00 94.72 Post-MMPE06/17/15 5.24 0.00 94.3504/02/18 4.90 0.00 94.6910/03/18 4.81 0.02 94.8011/06/19 5.95 0.00 93.64 Destroyed01/27/20 7.58 0.00 92.3508/17/20 5.36 0.00 94.5702/23/21 3.09 0.00 96.8404/22/08 6.70 0.20 93.4812/07/08 7.86 0.39 92.48 Pre-MMPE12/11/08 8.90 0.04 91.14 Post-MMPE12/23/08 7.40 0.09 92.6902/08/10 3.26 0.00 96.75 Pre-MMPE02/12/10 3.85 0.00 96.16 Post-MMPE03/17/10 5.68 0.04 94.3610/11/10 5.28 0.00 94.73 Pre-MMPE10/15/10 6.62 0.00 93.39 Post-MMPE06/26/12 5.95 0.00 94.0610/15/13 4.80 0.00 95.2106/17/15 4.87 0.00 95.1404/02/18 3.69 0.00 96.3210/03/18 4.76 0.00 95.2502/23/21 NM NM NM Not Located04/22/08 3.65 0.00 96.0412/07/08 7.28 0.02 92.43 Pre-MMPE12/11/08 7.82 0.00 91.87 Post-MMPE12/23/08 7.12 0.09 92.6502/08/10 2.82 0.00 96.87 Pre-MMPE02/12/10 NM NM NM Post-MMPE03/17/10 3.38 0.00 96.3110/11/10 5.38 0.00 94.31 Pre-MMPE10/15/10 7.31 0.00 92.38 Post-MMPE06/26/12 5.71 0.00 93.9810/15/13 5.64 0.00 94.0506/17/15 5.39 0.00 94.3010/03/18 5.00 0.00 94.6911/06/19 5.97 0.00 93.72 Abandoned04/22/08 4.34 0.00 95.6612/23/08 7.24 0.00 92.7603/17/10 3.31 0.00 96.6906/26/12 5.74 0.00 94.2610/15/13 5.39 0.00 94.6106/17/15 5.67 0.00 94.3304/02/18 4.71 0.00 95.2904/22/08 6.44 0.00 93.7012/23/08 7.54 0.00 92.6003/17/10 3.82 0.00 96.3206/26/12 6.10 0.00 94.0410/15/13 5.92 0.00 94.2206/17/15 5.88 0.00 94.2604/02/18 5.14 0.00 95.0004/22/08 6.85 0.00 93.6012/23/08 7.90 0.00 92.5503/17/10 4.05 0.00 96.4006/26/12 6.41 0.00 94.0410/15/13 6.37 0.00 94.0806/17/15 6.13 0.00 94.3204/22/08 5.85 0.00 93.7812/23/08 7.02 0.00 92.6103/17/10 3.20 0.00 96.4306/26/12 5.53 0.00 94.1010/15/13 5.50 0.00 94.1306/17/15 5.29 0.00 94.3404/02/18 4.54 0.00 95.09
99.939.04 - 9401/27/20MW-4R
3010/25/00MWD-6
99.598.53.5 - 8.53.505/29/96MW-4
99.693530 - 35
100.018.5
MW-8 10/18/00 5 5 - 15 15 100.14
MW-7 10/18/00 5 5 - 15 15 100.00
MW-10 10/25/00 5 5 - 10 10 99.63
MW-9 10/18/00 5 5 - 15 15 100.45
3.5 - 8.53.505/29/96MW-5
Page 2 of 4
Bottom
of Well
(ft. BGS)
TABLE 5
WELL CONSTRUCTION AND GAUGING INFORMATION
GURGANUS MOBIL (INCIDENT NO. 13374)
Date: 03/09/2021 Facility ID # : 0-006307
Top of
Casing
Elevation*
(ft.)
Depth to
Water from
Top of Casing
(ft.)
Free Product
Thickness**
(ft.)
Ground
Water
Elevation*
(ft.)
CommentsWell
ID
Date
Installed
(m/dd/yy)
Date Water
Level
Measured
(mm/dd/yy)
Well
Casing
Depth
(ft. BGS)
Screened
Interval
(x to y ft.
BGS)
04/22/08 5.14 0.00 92.5612/23/08 6.27 0.00 91.4303/17/10 2.73 0.00 94.9706/26/12 4.90 0.00 92.8010/15/13 4.86 0.00 92.8406/17/15 4.79 0.00 92.9104/02/18 3.82 0.00 93.8810/03/18 4.09 0.00 93.6104/22/08 5.41 0.00 93.5612/23/08 6.46 0.00 92.5103/17/10 2.96 0.00 96.0106/26/12 5.12 0.00 93.8510/15/13 5.05 0.00 93.9206/17/15 5.00 0.00 93.9704/02/18 6.19 0.00 92.7804/22/08 5.02 0.00 94.0612/23/08 6.64 0.00 92.4403/17/10 2.95 0.00 96.1306/26/12 5.21 0.00 93.8710/15/13 5.22 0.00 93.8606/17/15 5.08 0.00 94.0004/02/18 4.29 0.00 94.7910/03/18 4.66 0.00 94.4202/23/21 2.34 0.00 96.7404/22/08 NM NM NM Not Located12/23/08 7.03 0.00 91.9903/17/10 3.55 0.00 95.4706/26/12 5.64 0.00 93.3810/15/13 5.42 0.00 93.6006/17/15 5.72 0.00 93.3004/02/18 4.73 0.00 94.29MW-15 05/15/12 04/22/08 5 5 - 15 15 100.42 NM NM NM Not Located12/23/08 7.78 0.00 92.6003/17/10 4.06 0.00 96.3206/26/12 6.35 0.00 94.0310/15/13 6.32 0.00 94.0606/17/15 6.13 0.00 94.2504/02/18 5.37 0.00 95.0104/22/08 5.83 0.00 93.3812/23/08 6.75 0.00 92.4603/17/10 3.33 0.00 95.8806/26/12 5.46 0.00 93.7510/15/13 5.44 0.00 93.7706/17/15 5.36 0.00 93.8504/22/08 5.37 0.00 93.3812/23/08 6.38 0.00 92.3703/17/10 3.00 0.00 95.7506/26/12 5.06 0.00 93.6910/15/13 5.01 0.00 93.7406/17/15 4.95 0.00 93.8004/02/18 4.17 0.00 94.5810/03/18 4.53 0.00 94.2203/17/10 3.60 0.00 95.6806/26/12 5.62 0.00 93.6610/15/13 5.63 0.00 93.6506/17/15 5.53 0.00 93.7503/17/10 1.00 0.00 98.7806/26/12 NM NM NM Not Located10/15/13 5.87 0.00 93.9106/17/15 NM NM NM Not Located03/17/10 2.16 0.00 97.8006/26/12 5.85 0.00 94.1110/15/13 5.96 0.00 94.0006/17/15 5.74 0.00 94.2204/02/18 4.68 0.00 95.2803/17/10 3.72 0.00 96.9806/26/12 6.71 0.00 93.9910/15/13 6.62 0.00 94.0806/17/15 6.41 0.00 94.2904/02/18 5.55 0.00 95.1503/17/10 4.84 0.00 96.3406/26/12 7.21 0.00 93.9710/15/13 7.04 0.00 94.1406/17/15 7.07 0.00 94.11
99.08155 - 15505/15/02MW-13
100.38
MW-12 05/15/02 5 5 - 15 15 98.97
MW-11 05/15/02 5 5 - 15 15 97.70
99.28
MW-17 12/13/02 5 5 - 15 15 98.75
MW-14 05/15/02 5 5 - 15 15 99.02
MW-16 12/13/02 5 5 - 15 15 99.21
MW-15R 11/07/08 5 5 - 15 15
100.70
MW-20 02/11/10 1 1 - 9 9 99.96
MW-19 02/11/10 1 1 - 9 9 99.78
MW-22 02/12/10 2 2 - 12 12 101.18
MW-21 02/11/10 2 2 - 12 12
MW-18 02/11/10 2 2 - 12 12
Page 3 of 4
Bottom
of Well
(ft. BGS)
TABLE 5
WELL CONSTRUCTION AND GAUGING INFORMATION
GURGANUS MOBIL (INCIDENT NO. 13374)
Date: 03/09/2021 Facility ID # : 0-006307
Top of
Casing
Elevation*
(ft.)
Depth to
Water from
Top of Casing
(ft.)
Free Product
Thickness**
(ft.)
Ground
Water
Elevation*
(ft.)
CommentsWell
ID
Date
Installed
(m/dd/yy)
Date Water
Level
Measured
(mm/dd/yy)
Well
Casing
Depth
(ft. BGS)
Screened
Interval
(x to y ft.
BGS)
06/26/12 5.80 0.00 93.6710/15/13 5.71 0.00 93.7606/17/15 5.68 0.00 93.7906/26/12 5.89 0.00 93.6710/15/13 5.52 0.00 94.0406/17/15 5.67 0.00 93.8910/15/13 7.07 0.00 93.9406/17/15 6.96 0.00 94.0506/17/15 5.36 0.00 94.0804/02/18 4.62 0.00 94.8206/17/15 4.94 0.00 93.9904/02/18 4.13 0.00 94.8010/03/18 4.51 0.00 94.4203/17/10 4.37 0.00 95.7710/11/10 6.07 0.00 94.07 Pre-MMPE10/15/10 7.21 0.00 92.93 Post-MMPE06/26/12 6.17 0.00 93.9710/15/13 6.13 0.00 94.0106/17/15 5.86 0.00 94.28MW(QO)-1 Unknown 03/17/10 NA NA NA NM 4.68 0.00 NMMW(QO)-5 Unknown 03/17/10 NA NA NA NM 2.35 0.00 NMMW(QO)-8 Unknown 03/17/10 NA NA NA NM 4.85 0.00 NMTMW-1 10/15/13 10/15/13 2 2 - 12 12 NM 5.23 0.00 NMTMW-1G 06/16/15 06/17/15 2 2 - 12 12 104.60 8.65 0.00 95.95TMW-2G 06/16/15 06/17/15 2 2 - 12 12 104.21 5.36 0.00 98.85
• Reference point for top-of-casing elevation measurements is an assumed elevation of 100.00 feet.
• If free product present in well, ground water elevation calculated by: [Top of Casing Elevation - Depth to Water] + [free product thickness x
0.8581].
• ft BGS : feet below ground surface.
• Well construction information obtained from historical well records; Historical top-of-casing elevations for MW-1 through MW-17 were obtained
from historical tables during file review.
• NM: Not measured.
• NA: Well construction information not available.
• TMW-1 was abandoned on 10/15/13; TMW-1G and TMW-2G were abandoned on 06/18/15.
99.56
MW-23 06/26/12 2 2 - 12 12 99.47
99.44
MW-25 10/15/13 2 2 - 12 12 101.01
TW-1 02/17/10 45 45 - 50 50 100.14
MW-27 06/16/15 2 2 - 12 12 98.93
MW-26 06/16/15 2 2 - 10 10
MW-24 06/26/12 2 2 - 12 12
Page 4 of 4
Date : 03/09/2021
EPA
Method
504.1
EPA
Method
6010B
Well IDDate Collected(mm/dd/yy)1 600 600 500 20 6 70 70 70 70 25 70 70 400 400 0.02 15 400 700 2005,000 260,000 84,500 85,500 20,000 6,000 6,900 8,500 25,000 70,000 11,700 30,000 70,000 28,500 25,000 50 15,000 NE NE NE04/22/08 19,900 61,700 9,970 54,500 <60 2,790 620 245 I 755 465 I 630 2,400 290 IV 16,700 4,610 30.85 244 59,400 5,400 18,20012/23/08 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP03/17/10 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP06/26/12 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP10/16/13 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP06/17/15 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP04/02/18 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP10/03/18 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP01/27/20 1,860 1,520 517 7,730 <13 149 <13 <13 16.5 J <13 <13 50.5 <13 949 289 NR NR NR NR NR08/17/20 901 112 926 1,540 13.0 135 <3.1 <3.1 24.3 20.6 <3.1 60.1 <3.1 486 417 NR NR NR NR NR02/23/21 608 5.2 J 838 760 6.7 J 145 <3.1 3.7 J 27.2 6.8 J <3.1 62.5 <3.1 539 223 NR NR NR NR NR04/22/08 17,600 43,500 3,960 22,500 2,070 900 18.4 I <9.4 121 311 33.4 300 52.6 2,710 610 9.58 87.9 63,600 5,900 17,00012/23/08 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP03/17/10 7,420 40,200 11,900 89,100 463 J 23,500 8,330 1,210 1,620 <200 698 J 7,670 <240 82,400 19,900 4.47 59.3 26,000 62,620 32,70006/26/12 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP10/16/13 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP06/17/15 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP04/02/18 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP10/03/18 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP01/27/20 212 6,050 1,800 9,790 <25 403 <25 <25 65.6 J <25 <25 230 <25 1,850 525 NR NR NR NR NR08/17/20 4.9 1.9 2.9 1.8 0.9 3.7 0.33 J 0.28 J 0.75 0.85 0.16 J 1.1 <0.13 9.6 4.4 NR NR NR NR NR02/23/21 2.6 0.14 J 5.7 0.47 J <0.13 1.6 0.21 J 0.29 J 0.72 0.25 J 0.14 J 1.7 <0.13 3.5 0.71 NR NR NR NR NR04/22/08 8,400 28,400 6,860 36,400 <60 3,020 575 265 I 645 210 I 640 2,210 245 IV 14,600 4,160 1.32 22.2 39,000 5,300 16,10012/23/08 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP03/17/10 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP06/26/12 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP10/16/13 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP06/17/15 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP04/02/18 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP10/03/18 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP01/27/20 9,600 25,400 2,710 14,300 279 J 453 J <130 <130 <130 <130 <130 250 J <130 1,730 524 NR NR NR NR NR08/17/20 5,440 29,300 2,820 13,600 176 J 934 <130 <130 <130 <130 <130 229 J <130 1,680 520 NR NR NR NR NR02/23/21 5,170 24,400 3,500 17,900 <130 648 <130 <130 <130 <130 <130 235 J <130 1,810 512 NR NR NR NR NRC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics2L Standard (mg/l)GCL (mg/l)n-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneEDBLeadNaphthalenen-Butylbenzenesec-ButylbenzeneTolueneEthylbenzeneMW-1
MW-2
MW-3
MW-1R
MW-2R
MW-3R
TABLE 6SUMMARY OF GROUND WATER SAMPLE ANALYTICAL RESULTS GURGANUS MOBIL (INCIDENT NO. 13374)
Facility ID # : 0-006307
Analytical Method EPA Method 6200B MADEP Method VPH
IsopropylbenzeneIPEp-IsopropyltolueneContaminant of Concern BenzeneXylenesMTBEPage 1 of 6
Date : 03/09/2021
EPA
Method
504.1
EPA
Method
6010B
Well IDDate Collected(mm/dd/yy)1 600 600 500 20 6 70 70 70 70 25 70 70 400 400 0.02 15 400 700 2005,000 260,000 84,500 85,500 20,000 6,000 6,900 8,500 25,000 70,000 11,700 30,000 70,000 28,500 25,000 50 15,000 NE NE NEC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics2L Standard (mg/l)GCL (mg/l)n-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneEDBLeadNaphthalenen-Butylbenzenesec-ButylbenzeneTolueneEthylbenzeneTABLE 6SUMMARY OF GROUND WATER SAMPLE ANALYTICAL RESULTS GURGANUS MOBIL (INCIDENT NO. 13374)
Facility ID # : 0-006307
Analytical Method EPA Method 6200B MADEP Method VPH
IsopropylbenzeneIPEp-IsopropyltolueneContaminant of Concern BenzeneXylenesMTBE04/22/08 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS12/23/08 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP03/17/10 3,330 9,940 1,630 11,200 <125 584 210 J <70.0 128 J 230 J <100 293 J <120 2,910 888 0.141 101 7,270 5,890 9,37006/26/12 15,500 33,400 3,230 15,690 307 J 541 <100 <100 <100 598 <100 257 J <100 1,750 479 J 0.94 19.1 49,500 19,100 11,30010/16/13 17,500 34,700 3,770 22,000 399 723 <20 <20 84.4 J 942 <20 342 22.4 J 2,660 601 NR 6.8 33,000 <3,500 7,880 J06/17/15 11,100 24,300 2,580 16,200 349 651 <72 <69 90.0 J 622 <61 302 <60 2,760 714 NR NR NR NR NR04/02/18 5,560 17,700 4,760 18,000 45.4 J 1,900 475 206 466 182 140 1,520 26.8 J 5,160 3,710 NR NR NR NR NR10/03/18 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP01/27/20 6,310 271 5,190 19,200 64.0 J 1,450 72.8 J 42.1 J 200 182 <25 647 <25 5,800 1,600 NR NR NR NR NR08/17/20 419 7.4 J 693 580 <2.5 343 33.9 16.5 44.8 5.6 J 7.3 J 154 <2.5 834 245 NR NR NR NR NR02/23/21 5,270 28.8 J 2,870 879 64.5 J 833 <25 <25 79.6 J 191 <25 237 <25 478 134 NR NR NR NR NR04/22/08 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP12/23/08 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP03/17/10 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP06/26/12 1,950 5,290 2,010 9,720 <26 505 34.5 J 21.1 J 104 40.0 J <20 376 <20 3,120 773 <0.0095 5.3 9,210 18,700 17,10010/16/13 851 2,670 1,870 9,380 <10 551 33.6 J 24.3 J 106 <10 18.4 J 491 <10 3,330 805 NR <5.0 3,870 3,140 J 11,70006/17/15 1,200 2,090 1,110 7,300 26.7 J 586 18.0 J <14 63.6 33.3 J 19.2 J 206 <12 2,430 883 NR NR NR NR NR04/02/18 280 353 758 3,420 <6.3 414 54.2 33.1 97.8 <6.3 37.1 305 <6.3 2,370 736 NR NR NR NR NR10/03/18 1,070 762 1,330 5,910 11.6 J 601 44.5 30.2 104 26.8 30.0 336 <6.3 3,010 889 NR NR NR NR NR
02/23/21 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS04/22/08 0.910 I 4.49 0.730 I 3.49 <0.12 <0.41 <0.39 <0.47 <0.24 <0.15 <0.34 <0.30 <0.26 0.630 I <0.27 <0.0027 41.0 <100 <100 <10012/23/08 FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP FP03/17/10 <0.140 1.20 0.587 J 3.30 <0.250 0.506 J 0.214 J <0.140 <0.150 <0.200 <0.200 0.320 J <0.240 1.72 0.554 J <0.00968 7.50 <100 76.7 <27006/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0095 <5.0 <35 <35 <3510/16/13 0.25 J 0.97 0.35 J 1.6 <0.10 0.30 J <0.10 <0.10 <0.10 <0.10 <0.10 0.11 J <0.10 0.46 J 0.14 J NR <5.0 <35 <35 <3506/17/15 0.31 J 3.1 0.86 4.5 <0.16 0.36 J <0.14 <0.14 <0.12 <0.16 <0.12 0.18 J <0.12 0.74 0.30 J NR NR NR NR NR
10/03/18 1.6 10.2 2.2 10.9 <0.13 3.4 <0.13 <0.13 <0.13 <0.13 <0.13 0.46 J <0.13 2.8 0.70 NR NR NR NR NR
04/22/08 481 373 84.0 272 <1.2 <4.1 <3.9 <4.7 8.40 I 2.70 I 3.40 I 15.5 <2.6 39.7 13.4 <0.0027 19.9 1,860 119 22412/23/08 1.8 J 1.5 J 1.1 J 2.8 J <0.50 1.9 JB <0.85 <0.70 1.1 J <1.0 <1.0 1.4 J <0.55 1.3 J 0.57 J <0.02083 15.0 <100 121 <20403/17/10 4.15 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 0.240 J 0.989 J 0.797 J <0.200 1.05 <0.240 0.180 J <0.180 <0.00986 22.3 <100 <160.0 <27006/26/12 <0.13 1.2 0.61 2.47 <0.13 0.82 <0.10 <0.10 0.11 J <0.11 <0.10 0.27 J <0.10 1.3 0.29 J <0.0095 <5.0 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 0.16 J <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 5.0 <35 <35 <3506/17/15 33.2 0.94 15.1 42.3 0.28 J 3.5 <0.14 <0.14 0.59 0.28 J <0.12 1.5 <0.12 7.7 1.1 NR NR NR NR NR04/02/18 <0.13 <0.13 <0.13 0.81 J <0.13 0.98 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 1.6 0.40 J NR NR NR NR NR
MW-7
MW-4
MWD-6
MW-4R
MW-5
Page 2 of 6
Date : 03/09/2021
EPA
Method
504.1
EPA
Method
6010B
Well IDDate Collected(mm/dd/yy)1 600 600 500 20 6 70 70 70 70 25 70 70 400 400 0.02 15 400 700 2005,000 260,000 84,500 85,500 20,000 6,000 6,900 8,500 25,000 70,000 11,700 30,000 70,000 28,500 25,000 50 15,000 NE NE NEC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics2L Standard (mg/l)GCL (mg/l)n-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneEDBLeadNaphthalenen-Butylbenzenesec-ButylbenzeneTolueneEthylbenzeneTABLE 6SUMMARY OF GROUND WATER SAMPLE ANALYTICAL RESULTS GURGANUS MOBIL (INCIDENT NO. 13374)
Facility ID # : 0-006307
Analytical Method EPA Method 6200B MADEP Method VPH
IsopropylbenzeneIPEp-IsopropyltolueneContaminant of Concern BenzeneXylenesMTBE04/22/08 98.1 0.950 I 2.94 3.01 0.390 I 1.26 <0.39 <0.47 1.09 1.19 I <0.34 0.940 I <0.26 1.14 <0.27 <0.0027 36.0 214 <100 <10012/23/08 <0.60 <0.70 <0.50 <1.0 <0.50 0.76 JB <0.85 <0.70 <0.55 <1.0 <1.0 <0.75 <0.55 <0.70 <0.50 <0.02053 15.9 <100 <205 <20503/17/10 11.1 <0.190 <0.150 0.612 J 0.445 J <0.500 <0.180 <0.140 0.354 J 0.582 J <0.200 <0.220 <0.240 <0.150 <0.180 <0.00980 80.5 <100 82.8 <27006/26/12 0.92 2.0 <0.15 0.57 J <0.13 0.16 J <0.10 <0.10 0.33 J 0.14 J <0.10 <0.11 <0.10 0.11 J <0.10 <0.0095 82.1 <35 <35 <3510/16/13 1.3 <0.10 0.96 0.32 J <0.10 0.56 <0.10 <0.10 0.27 J <0.10 <0.10 0.29 J <0.10 0.11 J <0.10 NR 62.3 <35 <35 <3506/17/15 1.1 2.4 0.16 J <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 0.24 J <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/02/18 <0.13 0.63 0.26 J 1.2 J <0.13 0.67 <0.13 <0.13 0.14 J <0.13 <0.13 <0.13 <0.13 0.56 0.14 J NR NR NR NR NR04/22/08 <0.31 <0.28 <0.31 <1.2 <0.12 <0.41 <0.39 <0.47 <0.24 <0.15 <0.34 <0.30 <0.26 <0.26 <0.27 <0.0027 25.5 <100 <100 <10012/23/08 <0.60 <0.70 <0.50 <1.0 <0.50 <0.60 <0.85 <0.70 <0.55 <1.0 <1.0 <0.75 <0.55 <0.70 <0.50 <0.02071 10.4 <100 <208 <20803/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00980 21.6 <100 83.8 <27006/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0094 26.9 <35 <35 <3510/16/13 <0.10 0.23 J <0.10 0.37 J <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.12 J <0.10 NR 17.3 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/22/08 <0.31 <0.28 <0.31 <1.2 <0.12 <0.41 <0.39 <0.47 <0.24 <0.15 <0.34 <0.30 <0.26 <0.26 <0.27 <0.0027 8.93 <100 <100 <10012/23/08 <0.60 <0.70 <0.50 <1.0 <0.50 <0.60 <0.85 <0.70 <0.55 <1.0 <1.0 <0.75 <0.55 <0.70 <0.50 <0.02065 1.9 J <100 <195.2 <195.203/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00995 9.90 <100 63.5 <27006/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 0.14 J <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0098 41.8 <35 <35 <3510/16/13 0.11 J 1.1 0.89 4.6 <0.10 2.6 <0.10 <0.10 <0.10 <0.10 <0.10 0.42 J <0.10 3.2 0.73 NR <5.0 <35 35.4 J <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 0.46 J <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/02/18 <0.13 <0.13 <0.13 <0.25 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 NR NR NR NR NR04/22/08 <0.31 <0.28 <0.31 <1.2 <0.12 <0.41 <0.39 <0.47 <0.24 <0.15 <0.34 <0.30 <0.26 <0.26 <0.27 <0.0027 2.98 <100 <100 <10012/23/08 1,700 1,700 290 1,200 200 40 B <3.4 <2.8 10 J 47 J <4.0 26 <2.2 170 42 <0.02065 16.9 5,660 <1,102 48203/17/10 30.7 13.4 5.36 17.7 4.33 0.549 J <0.180 <0.140 0.196 J 0.671 J <0.200 0.336 J <0.240 2.25 0.567 J <0.00960 37.2 <100 <160.0 <27006/26/12 27.6 27.8 5.8 13.6 0.44 J 0.23 J <0.10 <0.10 0.19 J 0.19 J <0.10 0.48 J <0.10 0.71 0.21 J <0.0094 29.8 289 <35 <3510/16/13 61.8 26.9 12.1 45.2 0.72 0.56 <0.10 <0.10 0.28 J 0.58 <0.10 0.84 <0.10 2.3 0.59 NR 16.3 387 <35 <3506/17/15 0.37 J <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/02/18 124 7.7 46.5 148 3.7 11.1 0.15 J 0.16 J 1.6 1.2 <0.13 4.1 <0.13 22.7 5.3 NR NR NR NR NR10/03/18 195 16.9 77.1 256 2.5 12.4 <0.63 <0.63 2.1 J 1.7 J <0.63 5.2 <0.63 29.8 6.3 NR NR NR NR NR
04/22/08 <0.31 <0.28 <0.31 <1.2 0.260 I <0.41 <0.39 <0.47 <0.24 0.290 I <0.34 <0.30 <0.26 <0.26 <0.27 <0.0027 32.8 <100 <100 <10012/23/08 12 4.0 J 2.4 J 8.1 J 2.5 J 2.5JB <0.85 <0.70 <0.55 5.7 J <1.0 <0.75 <0.55 1.6 J 0.71 J <0.02102 5.2 <100 <203 <20303/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 0.577 J <0.200 <0.220 <0.240 <0.150 <0.180 <0.00949 42.6 <100 <160.0 <27006/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0095 32.9 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 10.9 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/02/18 6.2 <0.13 1.1 1.9 <0.13 0.45 J <0.13 <0.13 <0.13 0.23 J <0.13 <0.13 <0.13 0.34 J <0.13 NR NR NR NR NR
MW-8
MW-9
MW-10
MW-11
MW-12
Page 3 of 6
Date : 03/09/2021
EPA
Method
504.1
EPA
Method
6010B
Well IDDate Collected(mm/dd/yy)1 600 600 500 20 6 70 70 70 70 25 70 70 400 400 0.02 15 400 700 2005,000 260,000 84,500 85,500 20,000 6,000 6,900 8,500 25,000 70,000 11,700 30,000 70,000 28,500 25,000 50 15,000 NE NE NEC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics2L Standard (mg/l)GCL (mg/l)n-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneEDBLeadNaphthalenen-Butylbenzenesec-ButylbenzeneTolueneEthylbenzeneTABLE 6SUMMARY OF GROUND WATER SAMPLE ANALYTICAL RESULTS GURGANUS MOBIL (INCIDENT NO. 13374)
Facility ID # : 0-006307
Analytical Method EPA Method 6200B MADEP Method VPH
IsopropylbenzeneIPEp-IsopropyltolueneContaminant of Concern BenzeneXylenesMTBE04/22/08 2.40 <0.28 <0.31 <1.2 1.01 <0.41 <0.39 <0.47 <0.24 0.600 I <0.34 <0.30 <0.26 0.360 I <0.27 <0.0027 <2.2 <100 <100 <10012/23/08 160 1.4 J 32 38 34 10 B <0.85 <0.70 2.4 J 50 <1.0 2.8 J <0.55 9.3 2.5 J <0.02059 6.9 700 101 <20303/17/10 327 100 64.9 185 5.46 7.50 <0.450 0.708 J 1.79 J 19.6 <0.500 3.40 <0.600 28.8 5.23 0.0499 30.4 274 123 <27006/26/12 2,310 222 457 1,258 15.8 34.7 0.54 0.66 14.0 82.8 1.7 27.9 <0.10 138 26.6 <0.0093 88.7 2,090 1,990 95710/16/13 1,500 23.6 278 527 5.8 47.3 0.83 0.85 9.6 46.7 0.57 26.4 <0.10 63.7 11.2 NR 79.5 277 45.0 J 10006/17/15 799 16.8 149 255 4.6 J 34.2 <3.6 <3.5 5.6 J 35.4 <3.1 12.6 J <3.0 54.1 6.7 J NR NR NR NR NR04/02/18 190 6.3 66.8 103 1.1 21.8 0.40 J 0.47 J 5.3 9.6 0.30 J 10.4 <0.13 41.4 7.3 NR NR NR NR NR
10/03/18 1,990 26.5 668 1,680 9.7 J 115 <6.3 <6.3 23.2 J 40.6 <6.3 60.3 <6.3 328 68.1 NR NR NR NR NR
02/23/21 978 14.2 178 949 5.0 J 56.0 <3.1 <3.1 11.5 J 18.3 <3.1 33.7 <3.1 213 45.7 NR NR NR NR NR
04/22/08 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS12/23/08 1.3 J <0.70 <0.50 <1.0 5.1 0.80 JB <0.85 <0.70 <0.55 6.8 J <1.0 <0.75 <0.55 <0.70 <0.50 <0.02090 5.9 <100 <208 <20803/17/10 <0.140 <0.190 0.374 J <0.220 12.9 <0.500 <0.180 <0.140 <0.150 17.3 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00948 21.4 <100 <160.0 <27006/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0096 21.2 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 1.4 <0.15 <0.10 <0.10 <0.10 1.9 <0.10 <0.10 <0.10 <0.10 <0.10 NR 9.2 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/02/18 <0.13 <0.13 <0.13 <0.25 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 NR NR NR NR NRMW-15 04/22/08 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS12/23/08 730 7.1 J 48 400 32 30 B <1.7 <1.4 8.0 J 110 <2.0 5.4 J <1.1 110 32 <0.02083 6.1 3,100 637 26703/17/10 632 151 144 438 27.8 14.3 1.25 J 1.36 J 4.66 J 50.7 <1.00 9.56 <1.20 63.7 11.1 0.0498 64.2 566 145 16706/26/12 161 1.0 43.4 38.4 8.3 9.6 0.19 J 0.32 J 2.9 14.3 0.13 J 5.2 <0.10 19.4 1.0 <0.0094 44.4 265 184 17610/16/13 4.0 0.30 J 1.8 0.66 J 0.19 J 0.55 <0.10 <0.10 0.12 J 0.28 J <0.10 0.30 J <0.10 0.32 J <0.10 NR 10.8 <35 <35 <3506/17/15 250 4.3 82.7 115 1.5 21.3 0.44 J 0.46 J 4.7 8.0 0.32 J 11.6 <0.12 38.9 3.6 NR NR NR NR NR04/02/18 0.34 J <0.13 0.34 J <0.25 0.14 J 0.78 <0.13 <0.13 0.13 J 0.19 J 6.4 <0.13 <0.13 0.29 J <0.13 NR NR NR NR NR04/22/08 4.37 0.370 I 0.940 I 3.82 6.48 1.52 <0.39 <0.47 <0.24 9.19 <0.34 <0.30 <0.26 1.23 <0.27 <0.0027 <2.2 <100 <100 <10012/23/08 2.9 <0.70 <0.50 2.0 J <0.50 1.5 JB <0.85 <0.70 <0.55 3.4 J <1.0 <0.75 <0.55 0.91 J <0.50 <0.02035 8.0 <100 <205 <20503/17/10 <0.140 <0.190 <0.150 <0.220 2.17 <0.500 <0.180 <0.140 <0.150 3.12 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00945 17.2 <100 <160.0 <27006/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0095 12.6 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 5.3 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/22/08 8.13 0.390 I 0.510 I 3.29 47.0 2.81 <0.39 <0.47 0.370 I 3.14 I <0.34 <0.30 <0.26 0.660 I <0.27 <0.0027 <2.2 <100 <100 <10012/23/08 28 1.4 J 1.2 J 21 33 2.4 JB <0.85 <0.70 <0.55 4.1 J <1.0 <0.75 <0.55 3.8 J 0.89 J <0.02053 2.5 J 167 <210 <21003/17/10 215 5.72 13.5 213 72.7 15.7 0.614 J 0.792 J 2.53 12.3 <0.400 3.67 <0.480 32.7 5.52 <0.00943 15.5 197 177.4 <27906/26/12 <0.13 <0.13 <0.15 <0.30 2.7 0.55 <0.10 <0.10 <0.10 0.68 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0096 105 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 36.8 <35 <35 <3506/17/15 7.5 <0.17 0.39 J 1.2 J 1.0 0.42 J <0.14 <0.14 <0.12 0.86 <0.12 <0.16 <0.12 0.50 <0.14 NR NR NR NR NR04/02/18 302 14.1 24.0 774 7.2 30.0 <1.3 <1.3 5.8 9.5 <1.3 7.7 <1.3 111 25.6 NR NR NR NR NR10/03/18 449 15.6 57.8 942 4.9 J 31.1 <1.3 <1.3 6.3 8.5 <1.3 10.8 <1.3 109 24.4 NR NR NR NR NR
MW-14
MW-15R
MW-16
MW-17
MW-13
Page 4 of 6
Date : 03/09/2021
EPA
Method
504.1
EPA
Method
6010B
Well IDDate Collected(mm/dd/yy)1 600 600 500 20 6 70 70 70 70 25 70 70 400 400 0.02 15 400 700 2005,000 260,000 84,500 85,500 20,000 6,000 6,900 8,500 25,000 70,000 11,700 30,000 70,000 28,500 25,000 50 15,000 NE NE NEC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics2L Standard (mg/l)GCL (mg/l)n-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneEDBLeadNaphthalenen-Butylbenzenesec-ButylbenzeneTolueneEthylbenzeneTABLE 6SUMMARY OF GROUND WATER SAMPLE ANALYTICAL RESULTS GURGANUS MOBIL (INCIDENT NO. 13374)
Facility ID # : 0-006307
Analytical Method EPA Method 6200B MADEP Method VPH
IsopropylbenzeneIPEp-IsopropyltolueneContaminant of Concern BenzeneXylenesMTBE03/17/10 31.3 0.351 J 4.28 13.8 64.5 3.86 <0.180 0.303 J 0.844 J 7.12 <0.200 0.389 J <0.240 7.15 0.495 J <0.0103 143 <100 <170.6 <30006/26/12 <0.13 <0.13 <0.15 <0.30 2.2 1.1 <0.10 0.39 J 0.55 2.0 <0.10 0.16 J <0.10 <0.10 <0.10 <0.0097 158 <35 <35 38.6 J10/16/13 <0.10 <0.10 <0.10 <0.22 1.4 0.18 J <0.10 0.13 J 0.11 J 1.8 <0.10 <0.10 <0.10 <0.10 <0.10 NR 24.0 <35 <35 <3506/17/15 <0.17 <0.17 0.17 J <0.43 0.84 0.34 J <0.14 0.28 J 0.31 J 1.5 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR03/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00960 58.4 <100 <160.0 <27006/26/12 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS10/16/13 <0.10 0.19 J <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 19.8 <35 <35 <3506/17/15 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS03/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00991 111 <100 <166.7 <28906/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 0.16 J <0.11 <0.10 <0.10 <0.10 <0.0094 8.6 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 15.0 <35 <35 <3506/17/15 <0.17 0.62 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/02/18 <0.13 <0.13 <0.13 <0.25 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 NR NR NR NR NR03/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00951 137 <100 <170.6 <30006/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0095 60.9 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 15.3 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR04/02/18 <0.13 <0.13 <0.13 <0.25 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 NR NR NR NR NR03/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.0102 167 <100 <170.6 <30006/26/12 168 6.7 13.0 43.3 0.51 1.1 <0.10 <0.10 0.80 0.33 J <0.10 1.3 <0.10 6.2 0.74 <0.0094 168 <35 <35 <3510/16/13 6.5 1.1 11.8 17.0 <0.10 0.71 <0.10 0.16 J 1.1 <0.10 <0.10 3.4 <0.10 3.1 0.16 J NR 32.5 78.9 J 41.0 J <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 0.35 J <0.16 <0.12 <0.16 <0.12 0.23 J <0.14 NR NR NR NR NR06/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0095 114 <35 <35 <3510/16/13 <0.10 0.14 J <0.10 <0.22 <0.10 0.82 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.22 J <0.10 NR 19.7 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR06/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0096 15.3 <35 <35 <3510/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 0.19 J <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 NR 7.4 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 0.70 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR10/16/13 <0.10 <0.10 <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.0097 12.4 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NR06/17/15 <0.17 <0.17 0.40 J <0.43 0.40 J <0.12 <0.14 <0.14 <0.12 0.83 <0.12 <0.16 <0.12 <0.14 <0.14 <0.0096 NR <35 <35 <3504/02/18 <0.13 <0.13 <0.13 <0.25 0.35 J <0.13 <0.13 <0.13 <0.13 0.75 <0.13 <0.13 <0.13 <0.13 <0.13 NR NR NR NR NR06/17/15 267 19.1 38.4 279 11.0 9.6 <1.4 <1.4 2.0 J 7.6 <1.2 5.1 <1.2 32.7 7.4 <0.0097 NR 40.7 J <35 <3504/02/18 12.0 0.30 J 0.89 23.1 0.16 J 1.9 <0.13 <0.13 0.33 J 0.51 <0.13 0.27 J <0.13 2.9 0.67 NR NR NR NR NR10/03/18 47.8 2.2 7.9 79.4 0.48 J 6.0 <0.13 <0.13 0.87 1.4 <0.13 1.2 <0.13 8.0 1.6 NR NR NR NR NR
MW-26
MW-27
MW-20
MW-21
MW-22
MW-23
MW-24
MW-25
MW-19
MW-18
Page 5 of 6
Date : 03/09/2021
EPA
Method
504.1
EPA
Method
6010B
Well IDDate Collected(mm/dd/yy)1 600 600 500 20 6 70 70 70 70 25 70 70 400 400 0.02 15 400 700 2005,000 260,000 84,500 85,500 20,000 6,000 6,900 8,500 25,000 70,000 11,700 30,000 70,000 28,500 25,000 50 15,000 NE NE NEC5-C8 AliphaticsC9-C12 AliphaticsC9-C10 Aromatics2L Standard (mg/l)GCL (mg/l)n-PropylbenzeneStyrene1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneEDBLeadNaphthalenen-Butylbenzenesec-ButylbenzeneTolueneEthylbenzeneTABLE 6SUMMARY OF GROUND WATER SAMPLE ANALYTICAL RESULTS GURGANUS MOBIL (INCIDENT NO. 13374)
Facility ID # : 0-006307
Analytical Method EPA Method 6200B MADEP Method VPH
IsopropylbenzeneIPEp-IsopropyltolueneContaminant of Concern BenzeneXylenesMTBE03/17/10 17.7 110 36.0 195 1.24 21.8 7.34 1.79 2.93 <0.200 0.692 J <0.220 <0.240 93.6 25.0 <0.0101 7.99 176 <163.2 17806/26/12 <0.13 <0.13 <0.15 <0.30 <0.13 <0.10 <0.10 <0.10 <0.10 <0.11 <0.10 <0.11 <0.10 <0.10 <0.10 <0.0094 <5.0 <35 <35 <3510/16/13 <0.10 0.27 J 0.15 J 0.59 J <0.10 0.19 J <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 0.24 J <0.10 NR <5.0 <35 <35 <3506/17/15 <0.17 <0.17 <0.15 <0.43 <0.16 <0.12 <0.14 <0.14 <0.12 <0.16 <0.12 <0.16 <0.12 <0.14 <0.14 NR NR NR NR NRTMW-1 10/16/13 <0.10 0.11 J <0.10 <0.22 <0.10 <0.15 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.0099 69.3 <35 <35 <35MW(QO)-1 03/17/10 55.8 1.13 <0.150 5.93 5.87 1.72 <0.180 <0.140 0.315 J 1.65 <0.200 0.279 J <0.240 2.38 0.437 J <0.00978 9.02 <100 <160.0 <270MW(QO)-5 03/17/10 2.13 <0.190 <0.150 <0.220 0.652 J <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00977 15.0 <100 <160.0 <270MW(QO)-8 03/17/10 <0.140 <0.190 <0.150 <0.220 <0.250 <0.500 <0.180 <0.140 <0.150 <0.200 <0.200 <0.220 <0.240 <0.150 <0.180 <0.00968 8.66 <100 <160.0 <270Notes:• Results reported in µg/l (micrograms per liter).• 2L Standard: as specified in T15A NCAC 2L.02• GCL: Gross contamination level.• <: Less than the method detection limit specified in the laboratory report.• NE: Standard not established.• NS: Not sampled.• Concentrations in bold face type exceeded the 2L Standard; concentrations in italics exceeded the GCL.• I or J: Estimated value.• V: Present in laboratory blank.• For other compounds reported which did not exceed the 2L Standards, refer to the laboratory reports.
TW-1
Page 6 of 6
APPENDICES
APPENDIX A
State Correspondence
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2461 Received JAN 11 2021
APPENDIX B
Laboratory Report – Ground Water Samples
Table of Contents
-1-
Sections:
Section 1: Sample Summary ...................................................................................................3
Section 2: Summary of Hits ....................................................................................................4
Section 3: Sample Results ........................................................................................................6
3.1: FA83444-1: MW-1R .....................................................................................................7
3.2: FA83444-2: MW-2R .....................................................................................................9
3.3: FA83444-3: MW-3R .....................................................................................................11
3.4: FA83444-4: MW-4R .....................................................................................................13
3.5: FA83444-5: MW-13 ......................................................................................................15
Section 4: Misc. Forms ............................................................................................................17
4.1: Chain of Custody ...........................................................................................................18
Section 5: MS Volatiles - QC Data Summaries .....................................................................20
5.1: Method Blank Summary ................................................................................................21
5.2: Blank Spike Summary ...................................................................................................25
5.3: Matrix Spike/Matrix Spike Duplicate Summary ...........................................................29 123452 of 32
FA83444: Chain of Custody
Page 1 of 2
18 of 3244.1
Job Number:FA83444 Client:GEOLOGICAL RESOURCES INC
Date / Time Received:2/25/2021 10:30:00 AM Delivery Method:FFED EX
Project:GURRGANAS MOB.1
Airbill #'s:100963786577
Cooler Information
1. Custody Seals Present
2. Custody Seals Intact
4. Cooler temp verification
3. Temp criteria achieved
5. Cooler media
IR Gun
Ice (Bag)
Trip Blank Information
1. Trip Blank present / cooler
2. Trip Blank listed on COC
2. Samples preserved properly
Sample Information
1. Sample labels present on bottles
5. Sample recvd within HT
4. Condition of sample
3. Sufficient volume/containers recvd for analysis:
Intact
Comments
SM001Rev. Date 05/24/17
SGS Sample Receipt Summary
Cooler Temps (Raw Measured) °C:
Cooler Temps (Corrected) °C:
Cooler 1: (4.6);
Cooler 1: (2.8);
3. Type Of TB Received
W or S N/A
6. Dates/Times/IDs on COC match Sample Label
7. VOCs have headspace
8. Bottles received for unspecified tests
9. Compositing instructions clear
10. Voa Soil Kits/Jars received past 48hrs?
11. % Solids Jar received?
Misc. Information
25-Gram 5-GramNumber of Encores:Number of 5035 Field Kits:Number of Lab Filtered Metals:
Test Strip Lot #s:pH 0-3 230315 pH 10-12 219813A Other: (Specify)
Y or N N/A
Y or N
Therm ID:IR 1; Therm CF:-1.8; # of Coolers:1
Y or N N/A
12. Residual Chlorine Present?
Residual Chlorine Test Strip Lot #:
Technician:Reviewer:CARLOSD Date:Date:2/25/2021 10:30:00 A
FA83444: Chain of Custody
Page 2 of 2
19 of 3244.1
APPENDIX C
Contaminant Mass Calculations
Area ID Well ID Area
(ft²)
Average Well
Depth
(ft.)
Average
Depth to
Water
(ft.)
Water Column
Height
(ft)
Volume
(ft³)
Volume
(L)
Effective
Porosity
Effective
Volume
(L)
MW-1R
MW-2R
MW-3R
MW-4R
Area Date Well Benzene
(μ/L)
Toluene
(μ/L)
Ethylbenzene
(μ/L)
Xylenes
(μ/L)
MTBE
(μ/L)
Naphthalene
(μ/L)
Total
(μ/L)
DTW
(ft.)
Average Water
Column Height
(ft.)
Total Average Mass
(g)Percent Red.To Date Red.
MW-1R 1,860 1,520 517 7,730 13 149 11640.00 6.20
MW-2R 212 6,050 1,800 9,790 25.00 403 18280.00 5.64
MW-3R 9,600 25,400 2,710 14,300 279.00 453.00 52742.00 5.65
MW-4R 6,310 271 5,190 19,200 64.00 1,450 32485.00 7.58
Avg.4495.50 8310.25 2554.25 12755.00 95.25 768.67 28786.75 6.27
MW-1R 901 112 926 1540 13 135 3627.00 5.27
MW-2R 4.9 1.9 2.9 1.8 0.9 3.7 16.10 4.59
MW-3R 5440 29300 2820 13600 176 934 52270.00 5.29
MW-4R 419 7.40 693 580 2.50 343 2044.90 5.36
Avg.1691.23 7355.33 1110.48 3930.45 48.10 353.93 14489.50 5.13
MW-1R 608 5.2 838 760 6.7 145 2362.90 2.92
MW-2R 2.6 0.14 5.7 0.47 0.00 1.6 10.51 2.52
MW-3R 5,170 24,400 3,500 17,900 0.00 648 51618.00 2.79
MW-4R 5,270 28.8 2,870 879 64.5 833 9945.30 3.09
Avg.2762.65 6108.54 1803.43 4884.87 17.80 406.90 15984.18 2.83
Date
Average Water
Column Height
(ft.)
01/27/20 2.73
08/17/20 3.87
02/23/21 6.17
Notes:
• FP: Free Product
• Area of the contaminant plume is calculated from Figure 6
• Height of the water column is calculated by subtracting the average depth to water from the average well depth of the referenced monitoring wells
• Volume of the contaminant plume is calculated by multiplying the area of the plume by the average height of the water column during each sampling event
• Effective porosity is assumed based on the sub-surface soil profile obtained from well construction records and soil boring logs
• Total mass was calculated by multiplying the total contaminant concentrations for the sampling event with effective volume
• Contaminant mass cannot be calculated in wells containing FP; therefore, the total contaminant mass is based on the known concentrations in the area for each sampling event.
• When areas couldn’t be sampled, the last known concentrations were used in the calculations.
1 54,155270,776
APPENDIX C
PERCENTAGE REDUCTIONS
GURGANUS MOBIL (INCIDENT NO. 13374)
Baseline Event
0.209,5622.736.2793,499.5
1,955 -75.8%-25%
Total Contaminant Mass
(g)
Percent Reduction Compared
to Previous Event Percent Reduction To Date
1,559 ------
29%29%1,112
Area 1
02/23/21
2.73 1,558.95 ------
-25%-76%1,954.596.17
01/27/20
08/17/20 3.87 1,112.05 29%29%