WS-2185_44621_CA_IAR_20160120

UST Closure & Initial Abatement Action Report S&ME Project No. 4358-15-015
City of High Point Potts Ave, High Point, North Carolina January 20, 2016
i
TABLE OF CONTENTS
1. SITE IDENTIFICATION AND CONTACT INFORMATION...............................1
1.1 Site Identification and Contact Information........................................................ 1
1.2 Release Information..................................................................................................... 1
1.3 Certification..................................................................................................................... 1
2. BACKGROUND..................................................................................................2
3. SITE UST INFORMATION AND CHARACTERIZATION..................................2
3.1 UST Information............................................................................................................. 2
3.2 UST Owner and Operator Information.................................................................. 2
3.3 UST Release..................................................................................................................... 2
3.4 Site Characteristics........................................................................................................ 2
4. UST CLOSURE AND INITIAL ABATEMENT ACTION......................................3
4.1 UST Closure Activities.................................................................................................. 3
4.2 Soil Excavation and Sampling................................................................................... 3
4.3 Initial Abatement Soil Sample Analytical Results............................................... 4
5. SITE CHECK REPORT........................................................................................4
6. UST CLOSURE REPORT ....................................................................................4
7. FREE PRODUCT INVESTIGATION AND RECOVERY REPORT........................4
8. GROUNDWATER INVESTIGATION.................................................................4
9. CONCLUSIONS..................................................................................................5
FIGURES
1 Site Vicinity Map
2 USGS Topographic Map Site Location
3 Sample Location Map
TABLES
1 UST System Information
2 UST Owner/Operator Information
3 UST Closure Confirmation Soil Samples – Laboratory Analytical Results
4 Summary of Soil Sample Analytical Results – Risk-Based Analyses
5 Summary of Soil Sample Analytical Results – Soil Sample TB-18
APPENDICES
I UST Closure Photographs
II Fluid, Tank, and Soil Disposal Documentation
III Laboratory Reports, and Chain-of-Custody Records
UST Closure & Initial Abatement Action Report S&ME Project No. 4358-15-015
City of High Point Potts Ave, High Point, North Carolina January 20, 2016
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2. BACKGROUND
The City of High Point Potts Avenue site is located at 1329 Potts Avenue in High Point, Guilford
County, North Carolina (Figure 1 and Figure 2). The City of High Point purchased the subject
property for the construction of a proposed elevated water storage tank for the City’s water
system. Based on a review of historic aerial photographs, several industrial commercial structures
were previously located on the site prior to 1998. During 2015, the site was mostly wooded and
no structures existed. During 2015, due diligence activities discovered two USTs on the subject
property. Each UST was estimated to be approximately 550-gallons in size and formerly used as
heating oil tanks. The subject USTs were previously owned and operated by an unknown party.
The two 550-gallon heating oil USTs were located end to end and occupied a common UST basin.
The City of High Point contracted the removal of these USTs, which occurred on November 10,
2015. Known UST System and Other Release Information is summarized in Table 1. Table 2
summarizes UST Owner/Operator Information.Figure 3 depicts the location of the USTs on a site
aerial photograph based figure. Photographs of the site are included in Appendix I.
3. SITE UST INFORMATION AND CHARACTERIZATION
3.1 UST Information
The site contained two 550-gallon heating oil USTs, each 6-feet long and 4 feet in diameter.
Information pertaining to these USTs is provided in Table 2.
3.2 UST Owner and Operator Information
As a result of the purchase of the subject site, both the 550-gallon heating oil USTs were owned
by the City of High Point. The City of High Point never operated the subject USTs. No
information is currently known regarding the prior ownership or operation of the subject USTs.
Table 2 summarizes this information.
3.3 UST Release
During November 2015 the USTs were permanently closed by removal. Analytical results of two
soil samples collected beneath the UST indicated concentrations of Total Petroleum
Hydrocarbons in the Diesel Range (TPH-DRO) of 4,870 and 14,700 mg/kg, for samples UST-A and
UST-B, respectively.
3.4 Site Characteristics
Based on the topography of the area, the site appears to slope toward the south (Figure 1), and
the groundwater flow direction would likely mirror the topography, with flow toward the south.
The site is located in an industrial and commercial area with some residential land use to the east
of the subject site. The prior site structures were previously demolished and the site was vacant
and mostly wooded.
According to the 1982 Geologic Map of Region G, North Carolina, the site is located in the
Caroline Slate Belt and the rock underlying the site is comprised of a felsic intrusive complex (icf).
UST Closure & Initial Abatement Action Report S&ME Project No. 4358-15-015
City of High Point Potts Ave, High Point, North Carolina January 20, 2016
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4. UST CLOSURE AND INITIAL ABATEMENT ACTION
4.1 UST Closure Activities
On November 10, 2015, S&ME was on-site to observe and document the closure procedures used
for the removal of the 550-gallon heating oil USTs. The closure and subsequent initial abatement
action activities were conducted by EVO Corporation (EVO). The tops of the USTs were located
approximately three feet below land surface. On November 10, 2015, EVO used a vacuum truck
to remove residual liquids in the tanks, which was mostly water, with a slight sheen, exhibiting a
fuel oil odor. Approximately 800 gallons of fluids (mostly water, identified as “petroleum contact
water”) was disposed off-site by EVO. A copy of the liquid disposal manifest is included in
Appendix II.
On November 10, 2015, the two steel USTs were removed and crushed for disposal. The tanks
were observed to exhibit severe corrosion with multiple holes visible. The crushed USTs were
transported off-site for disposal by EVO. A copy of the UST disposal documentation is included in
Appendix II. Photographs of the removed USTs are included in Appendix I.
Following removal of the USTs, S&ME evaluated the underlying soils for evidence of impacts,
obtaining soil head-space field screening data with a photo-ionization detector (PID) for the
detection of volatile organic vapors. Field screening data was obtained for the soil samples
collected for closure confirmation. Two closure soil samples (sample IDs = UST-A and UST-B)
were collected from soils located immediately below the 550-gallon heating oil USTs. The two
closure samples were submitted to Research and Analytical Laboratories, Inc. for laboratory
analyses for total petroleum hydrocarbons in the diesel range (TPH-DRO by Method 8015/3550).
Results of the closure samples indicated the following:
•As summarized in Table 3, TPH-DRO was detected above the North Carolina Department
of Environmental Quality (DEQ) Action Limit of 10 mg/kg TPH in both samples UST-A and
UST-B.
The locations of the soil samples are indicated on Figure 3.
4.2 Soil Excavation and Sampling
Between November 10-23, 2015, suspect petroleum hydrocarbon impacted soils were excavated
as an initial abatement action, using soil head-space field screening data as a guide for the
excavation. The excavation continued and was terminated based on client discretion.
Approximately 1,859.24 tons of soil was removed and transported off-site for disposal.
Groundwater was not encountered during the excavation activities. A copy of the soils disposal
documentation is included in Appendix II.
Twelve soil samples were collected to assess the initial abatement actions. Soil samples W1-11,
W2-18, S1-22, S2-18, E1-18, E2-12, N1-20 and N2-10 were collected from the excavation
sidewalls, B1-20, B2-12, CENTER-18 and TB-18 were collected from the bottom of the excavation.
These soil samples were submitted for laboratory analyses by Method 8260, Method 8270, and
MADEP VPH and EPH.
UST Closure & Initial Abatement Action Report S&ME Project No. 4358-15-015
City of High Point Potts Ave, High Point, North Carolina January 20, 2016
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4.3 Initial Abatement Soil Sample Analytical Results
Table 4 and Table 5 provide a summary of the soil sample analytical results, for samples collected
from the limits of the final excavation. These tables include the corresponding NCDEQ Soil to
Groundwater, Residential, and Industrial Commercial; Maximum Contaminant Concentrations
(MSCCs). As summarized in Table 4 and Table 5:
•Analytical results for analysis by MADEP methods detected concentrations of Alphatics
C5-C8,and Alphatics C9-C18 at sample location TB-18 that are greater than the NCDEQ
MSCCs for “Soil-to-Groundwater” and less than the “Residential” MSCCs. The Aromatic
C9-C22 concentration was greater than the “Residential” MSCC but less than the
“Industrial-Commercial” MSCC.
•Analytical results for analysis by Method 8260 detected concentrations of P-
Isopropyltoluene and Naphthalene at sample location TB-18 that are greater than the
NCDEQ MSCCs for “Soil-to-Groundwater” and less than the “Residential” MSCC.
•Analytical results for analysis by Method 8270 detected concentrations of 2-
Methylnaphthalene, Naphthalene, and 1-Methylnaphthalene at sample location TB-18
that are greater than the NCDEQ MSCCs for “Soil-to-Groundwater” and less than the
“Residential” MSCC.
•The concentrations reported for the remaining 11 soil samples were below the
corresponding reporting limits and/or the lower of the MSCCs for each analyte.
A copy of the laboratory reports and chain of custody records are included in Appendix III.
5. SITE CHECK REPORT
Based on information reviewed by S&ME, and the completed initial abatement actions, a site
check was not conducted.
6. UST CLOSURE REPORT
This report is submitted in lieu of a UST Closure Report.
7. FREE PRODUCT INVESTIGATION AND RECOVERY REPORT
No free product was encountered or observed during the UST closure or during removal of the
TPH impacted soils.
8. GROUNDWATER INVESTIGATION
Confirmed groundwater was not encountered during these activities.
UST Closure & Initial Abatement Action Report S&ME Project No. 4358-15-015
City of High Point Potts Ave, High Point, North Carolina January 20, 2016
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9. CONCLUSIONS
Based on the results of the UST closure activities, the following site conditions are noted:
1. Two 550-gallon suspect heating oil UST were discovered by the City of High Point prior to
purchase of the subject property. The City of High Point never operated the subject USTs.
2. Two 550-gallon single-wall steel USTs were permanently closed by removed on
November 10, 2015. Based on soil head-space field screenings with the PID, suspect
petroleum hydrocarbons were indicated beneath the USTs.
3. Closure confirmation soil samples collected beneath each UST confirmed a release. TPH-
DRO was detected at concentrations greater than the NCDENR Action Level of 10 mg/kg
TPH in the soil samples collected directly below each UST.
4. Between November 10 and November 23, 2015, approximately 1,859.24 tons of soil was
removed and transported off-site for proper disposal as an initial abatement action.
•Twelve soil samples were collected from the limits of the initial abatement action soil
excavation, and submitted for the analyses using appropriate NCDEQ Risk-Based
analytical methods. Analytical results for these samples reported:
1. Analytical results for analysis by MADEP methods detected concentrations of
Alphatics C5-C8,and Alphatics C9-C18 at sample location TB-18 that are greater
than the NCDEQ MSCCs for “Soil-to-Groundwater” and less than the “Residential”
MSCCs. The Aromatic C9-C22 concentration was greater than the “Residential”
MSCC but less than the “Industrial-Commercial” MSCC.
2. Analytical results for analysis by Method 8260 detected concentrations of p-
Isopropyltoluene and Naphthalene at sample location TB-18 that are greater than
the NCDEQ MSCCs for “Soil-to-Groundwater” and less than the “Residential”
MSCC.
3. Analytical results for analysis by Method 8270 detected concentrations of 2-
Methylnaphthalene, Naphthalene, and 1-Methylnaphthalene at sample location
TB-18 that are greater than the NCDEQ MSCCs for “Soil-to-Groundwater” and
less than the “Residential” MSCC.
4. The concentrations reported for the remaining 11 soil samples were below the
corresponding reporting limits and/or the lower of the MSCCs for each analyte.
•Free-product was not observed.
•Evidence of groundwater was not observed.
FIGURES
3/25/2015
CHECKED BY:
DRAWN BY:
DATE:
FIGURE NO.
1
PROJECT NO.:
NTSSCALE:
4358-15-015
JBC
SITE VICINITY MAP
Potts Ave Phase II UST Investigation
High Point, North CarolinaKDH
SITE
SITE
REFERENCE:
• Google Earth Pro Aerial Photograph
• Dated April 5, 2013
SCALE:
DRAWN BY:
DATE:
PROJECT NO:
FIGURE NO.
WWW.SMEINC.COM
USGS TOPOGRAPHIC MAP

1329 POTTS AVENUE
HIGH POINT, NORTH CAROLINA
AS SHOWN
RDM
JAN. 2016
4358-15-015
2
0
GRAPHIC SCALE
2,000 1,000 2,000
SCALE: 1" = 2,000'
SOURCE: HIGH POINT WEST, NC QUADRANGLE, 7.5-MINUTE SERIES USGS
TOPOGRAPHIC MAP (2013), HIGH POINT EAST, NC QUADRANGLE, 7.5-MINUTE
SERIES USGS TOPOGRAPHIC MAP (2013) OBTAINED FROM http://store.usgs.gov.
SITE
!(
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!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(!(
Center-18
TB-18
UST #1 UST #2
UST-AUST-B
E2-12
B2-12
N2-10N1-20
B1-20
W1-12
W2-18
S2-18
S1-22
E2-18
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/AirbusDS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, andthe GIS User CommunitySOIL SAMPLE LOCATION MAP1329 Potts AvePhase II UST InvestigationHigh Point, North Carolina 3
4358-15-015
DEC WWW.SMEINC.COM
SCALE:
PROJECT NO:
DATE:
DRAWN BY:
FIGURE NO.
01-20-16
1 " = 25 'Q:\4358\2015\15-015 POTTS AVE HP\Potts AVENUE HP EXCAVATION.mxdENGINEERING LICENSE NO: F-0176
±
REFERENCE:GIS DATA LAYERS WERE OBTAINED FROM ESRI. PLEASE NOTE THIS MAP IS FOR INFORMATIONALPURPOSES ONLY. IT IS NOT MEANT FOR DESIGN, LEGAL, OR ANY OTHER USES. THERE ARE NOGUARANTEES ABOUT ITS ACCURACY. S&ME, INC. ASSUMES NO RESPONSIBILITY FOR ANYDECISION MADE OR ANY ACTIONS TAKEN BY THE USER BASED UPON THIS INFORMATION.
!(Sample Locations
Excavation Boundary
Former UST Location
TABLES
TABLE 1
UST SYSTEM INFORMATION
CITY OF HIGH POINT
1329 POTTS AVENUE
HIGH POINT, GUILFORD COUNTY, NORTH CAROLINA
S&ME, INC. PROJECT NO. 4358-15-015
UST ID
Number
Prior
Contents
Capacity
(gallons)Closed / Active Release from System?
1 Heating Oil 550 closed by removal 11/10/15 Yes
2 Heating Oil 550 closed by removal 11/10/15 Yes
TABLE 2
UST OWNER/ OPERATOR INFORMATION
UST Information Owner Operator Dates of Operation
550-gallon Heating Oil
City of High Point
Property Owner Unknown Unknown
550-gallon Heating Oil
City of High Point
Property Owner Unknown Unknown
Owner Address: 211 South Hamilton Street, High Point, NC 27260
CITY OF HIGH POINT
1329 POTTS AVENUE
HIGH POINT, GUILFORD COUNTY, NORTH CAROLINA
S&ME, INC. PROJECT NO. 4358-15-015
TABLE 3
UST CLOSURE CONFIRMATION SOIL SAMPLES
Sample Date Odor? TPH-GRO TPH-DRO Comment
Location Collected
UST-A 11/10/15 diesel-fuel oil not requested 4,870 directly beneath UST#2
UST_B 11/10/15 diesel-fuel oil not requested 14,700 directly beneath UST#1
NCDEQ-DWM-UST Section - Action Limits 10 10
Concentration is bold print exceed the North Carolina Department of Environmental Quality Action Limits
TPH-DRO = Total Petroleum Hydrocarbons in the Diesel Range by Method 8015/3550
TPH-GRO = Total Petroleum Hydrocarbons in the Gasoline Range by Method 8015/5030
LABORATORY ANALYTICAL RESULTS
1329 POTTS AVENUE
HIGH POINT, GUILFORD COUNTY, NORTH CAROLINA
S&ME, INC. PROJECT NO. 4358-15-015
TABLE 4
SUMMARY OF SOIL SAMPLE ANALYTICAL RESULTS
RISK-BASED ANALYSES
1329 POTTS AVENUE
HIGH POINT, GUILFORD COUNTY, NORTH CAROLINA
S&ME, INC. PROJECT NO. 4358-15-015
EPA Method 8260
(Volatile Organics)
EPA Method 8270
(Semi-Volatile Organics)
Sample
Location
all target compoundsall target compoundsAliphatic (C05-C08)Aliphatic (C09-C18)Aliphatic (C19-C36)Aromatic (C9-C22)
Date
Collected
(mm/dd/yy)
Sample
Depth
(ft. BGS)mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
W1-11 11/11/15 11 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
W2-18 11/13/15 18 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
S1-22 11/23/15 22 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit 127 Less than
reporting limit 14.5
S2-18 11/23/15 18 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
E1-18 11/23/15 18 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
E2-12 11/23/15 12 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
N1-20 11/23/15 20 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit 133 Less than
reporting limit 30.1
N2-10 11/23/15 10 sidewall All less than reporting limit All less than reporting limit Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
B1-20 11/23/15 20 bottom All less than reporting limit All less than reporting limit Less than
reporting limit 178 18.2 15.4
B2-12 11/23/15 12 bottom All less than reporting limit All less than reporting limit Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
Less than
reporting limit
CENTER-18 11/18/15 18 bottom All less than reporting limit All less than reporting limit Less than
reporting limit 11.3 Less than
reporting limit
Less than
reporting limit
TB-18 11/18/15 18 bottom see Table 5 see Table 5 75.6 1,307 51.6 951
Constituent Specific Constituent Specific 68 540 N/A 31
Constituent Specific Constituent Specific 939 1,500 31,000 469
Constituent Specific Constituent Specific 24,528 40,000 810,000 12,264
Concentrations in bold print exceed NCDEQ Soil to Groundwater MSCCs
MSCC = NCDEQ Maximum Soil Contaminant Concentrations
Analytical Method
Soil to Groundwater MSCC
Residential MSCC
Industrial/Commercial MSCC
VPH = Volatile Petroleum Hydrocarbon - Massachusetts Department of Environmental Protection
EPH = Extractable Petroleum Hydrocarbon - Massachusetts Department of Environmental Protection
ft. BGS = feet below ground surface
mg/kg = milligrams per kilogram
ug/kg = micrograms per kilogram
MADEP VPH / EPH
Sample ID
Constituent of
Concern
T:\Projects\2015\ENV\4358-15-015_City of High Point_Potts Avenue Phase II\Deliverables - UST Closure+IAA\Final Report\Tables.xlsx
TABLE 5
SUMMARY OF SOIL SAMPLE ANALYTICAL RESULTS
SOIL SAMPLE TB-18
1329 POTTS AVENUE
HIGH POINT, GUILFORD COUNTY, NORTH CAROLINA
S&ME, INC. PROJECT NO. 4358-15-015
Reported
Concentration
Soil to
Groundwater Residential
Industrial /
Commercial
Analyte (mg/kg) (mg/kg) (mg/kg) (mg/kg)
N-butylbenzene 1.67 4.3 626 16,350
Sec-butylbenzene 1.88 3.3 626 16,350
Tert-butylbenzene 0.291 3.4 626 16,350
Ethylbenzene 0.305 4.9 1,560 40,000
I-Propylbenzene 0.493 1.7 1,564 40,880
p-Isopropyltoluene 1.46 0.12 100 4,000
Naphthalene 5.64 0.16 313 8,176
N-propylbenzene 0.727 1.7 626 16,350
1,2,4-Trimethylbenzene 1.45 8.5 782 20,440
1,3,5-Trimethylbenzene 3.65 8.3 782 20,440
Total Xylenes 0.287 4.6 3,129 81,760
Flourene 3.15 47 620 16,400
2-Methylnaphthalene 24.1 3.6 63 1,635
Phenanthrene 6.40 56 469 12,264
Naphthalene 4.63 0.16 313 8,176
1-Methylnaphthalene 16.1 0.004 20 100
Concentrations in bold print exceed NCDEQ Soil to Groundwater MSCCs
EPA Method 8260 (Volatile Organics)
EPA Method 8270 (Semi-Volatile Organics)
MSCC = NCDEQ Maximum Soil Contaminant Concentrations
MSCCsSoil Sample ID = TB-18
ug/kg = micrograms per kilogram
T:\Projects\2015\ENV\4358-15-015_City of High Point_Potts Avenue Phase II\Deliverables - UST Closure+IAA\Final Report\Tables.xlsx
APPENDIX I
UST Closure Photographs
UST Closure –1329 Potts Ave., High Point, NC
Project #: 4358-15-015
Sheet 1 of 4 8646 West Market Street, Suite 105
Greensboro, NC 27409
Date: 11/10/15Photographer:E. Henriques
1
Location / Orientation
Remarks UST Condition - Example
Date:11/10/2015Photographer: E. Henriques
2
Location / Orientation
Remarks UST Condition - Example
UST Closure –1329 Potts Ave., High Point, NC
Project #: 4358-15-015
Sheet 2 of 4 8646 West Market Street, Suite 105
Greensboro, NC 27409
Date: 11/2015Photographer:E. Henriques
3
Location / Orientation
Remarks Soil Staining Near UST removal location
Date: 11/2015Photographer:E. Henriques
4
Location / Orientation
Remarks Soil Staining In Excavation - Example
APPENDIX II
Fluid, Tank, and Soil Disposal Documents
APPENDIX III
Laboratory Reports and Chain of Custody Records