MO-88846_96513_CA_IAR_20210818

August 18, 2021
Mr. Danial P. Bowser, P.G. North Carolina Department of Environmental Quality Mooresville Regional Office
610 E Center Avenue, Suite 301 Mooresville, NC 28115
Subject: Initial Assessment Report for Non-UST Release Emergency Response
Southbound Interstate 485 on Ramp Towards Matthews Charlotte, Mecklenburg County, North Carolina 28262
Dear Mr. Bowser:
On June 24, 2021, Emergency Response & Training Solutions (ERTS) reported to the North Carolina Department of Environmental Quality (NCDEQ) that approximately 45-gallons of diesel fuel was released from a transport truck as the result of a traffic accident on the southbound on-ramp from I-85 to I-485 heading towards Matthews in Charlotte, Mecklenburg County, North Carolina. The attached Initial Assessment Report (IAR)
summarizes the incident response and abatement activities. The IAR was prepared in accordance with the NCDEQ UST Section Guidelines for the Investigation and Remediation
of Contamination from Non-UST Petroleum Releases.
If you have any questions or concerns, please do not hesitate to contact the undersigned at
[phone].
Sincerely,
MID-ATLANTIC ASSOCIATES, INC.
Troy L. Holzschuh Project Manager
Greg D. Icenhour, P.G., MBA
Vice President / Principal GeologistNC Licensed Geologist #0883 Attachments
cc: Darius Grady, HEPACO, LLC.

Initial Assessment Report for Non-UST Release Emergency Response On-Ramp to Interstate Highway 485 Towards Matthews
Charlotte, Mecklenburg County, North Carolina
August 18, 2021 Mid-Atlantic Job No.: 021H1586.00
Prepared for: Mr. Darius Grady
HEPACO, LLC. 2711 Burch Drive Charlotte, North Carolina 28269
Prepared by: Mid-Atlantic Associates, Inc. 1125 E. Morehead Street, Suite 104 Charlotte, North Carolina 28204
Initial Assessment Report August 18, 2021 On-Ramp to Interstate Highway 485, Charlotte, NC Page i

TABLE OF CONTENTS A. Site Information ................................................................................................................. 1
B. Site History and Characterization ..................................................................................... 2
C. Free Product Investigation and Recovery Report ........................................................... 2
D. Groundwater and Surface Water Investigation ................................................................ 2
E. Initial Response and Abatement Action ........................................................................... 2
F. Excavation of Contaminated Soil ..................................................................................... 2
G. Conclusions ....................................................................................................................... 3

Figures Figure 1 Site Location Map Figure 2 Site and Sample Location Map Table
Table 1 Ultraviolet Fluorescence Analytical Results – July 2021
Appendices Appendix A Photo Log Appendix B Soil Disposal Manifests Appendix C Ultraviolet Fluorescence and Laboratory Analytical Data
Initial Assessment Report August 18, 2021 On-Ramp to Interstate Highway 485, Charlotte, NC Page 1

Initial Assessment Report (for Non-UST Petroleum Releases)
Approximately 45 gallons of diesel fuel was released from a transport truck on June 24, 2021, as a result of a traffic accident on the southbound on-ramp from I-85 to I-485 heading towards Matthews in Charlotte, Mecklenburg County, North Carolina. A single tractor trailer traveling south on the I-485
on-ramp was involved in an accident that resulted in leakage from the truck’s saddle tank. The truck rolled over on the eastern bank of the on-ramp, rolling toward the western bank, catching fire. Charlotte Fire Department and HEPACO, LLC (HEPACO) initially responded to the incident on the day it occurred. Emergency Response & Training Solutions (ERTS) reported the incident to the North Carolina Department of Environmental Quality (NCDEQ) on June 24, 2021.
The fire department extinguished the fire and HEPACO placed absorbent boom at the edge of pavement and in the roadside ditch located off the western shoulder. The absorbent boom was placed in intervals over one hundred feet and spill pads were used to address visible staining. The spill area was covered with plastic liner. HEPACO and Mid-Atlantic mobilized to the site on July 15, 2021, to address impacted soils. Soil excavation was completed by HEPACO, and confirmatory endpoint sampling was completed by Mid-Atlantic at that time. A. Site Information 1. Site Identification
• Date of Report: August 18, 2021
• Facility I.D.: N/A Incident Number: N/A Site Rank: N/A
• Site Name: Southbound I-485 On-Ramp Towards Matthews
• Site Street Address: Southbound I-485 On-Ramp Towards Matthews
• City/Town: Charlotte Zip Code:28262 County: Mecklenburg
• Description of Geographical Data Point: Site of accident
• Location Method: Google Maps
• Latitude: 35.349166° Longitude: -80.735433° 2. Information About Contacts Associated with the Release
• Owner: Thompson Trucking Inc. Address: 11939 Richmond Highway, Concord, VA 24538 Telephone: [phone]
• Operator: Thompson Trucking Inc. Address: 11939 Richmond Highway, Concord, VA 24538 Telephone: [phone]
• Property Owner/Occupant: NCDOT Address: 1501 Mail Service Center, Raleigh, NC 27699 Telephone: [phone]
• Consultant/Contractor: Mid-Atlantic Associates, Inc.
Address: 1125 E. Morehead Street Suite 104 Charlotte, NC 28204 Telephone: [phone]
• Analytical Laboratory: Rapid Environmental Diagnostics (RED) Lab State Certification No.: 402
• Address: 5598 Marvin Moss Lane, Wilmington, NC 28409 Telephone: [phone] 3. Information About Release
• Date Discovered: June 24, 2021
• Estimated Quantity of Release: ~45 gallons diesel fuel
• Cause of Release: Accident
• Source of Release: Saddle tank
• Sizes and contents of UST(s) or other containment from which the release occurred: Diesel fuel from the truck’s containment receptacle.
Initial Assessment Report August 18, 2021 On-Ramp to Interstate Highway 485, Charlotte, NC Page 3

document constituents of concern (COCs) in the remaining soil were below applicable soil screening
levels. The excavation limits were determined through visual, olfactory, and field screening techniques using
a QED Ultraviolet Fluorescence (UVF) analyzer supplied by RELABS of Wilmington, North Carolina. The UVF analyzer detects total petroleum hydrocarbons (TPH) concentrations in soil as low as one milligram per kilogram (mg/kg). The UVF was operated by Mid-Atlantic personnel trained and certified in UVF use and operation. The combined area of excavation comprised approximately 665-square feet in size and was advanced using a track hoe to depths ranging from 0.5 to 1.0 feet below ground surface (bgs). A total of 18.61 tons of contaminated soil were removed from the area of impact. Excavated soil was direct loaded into dump trucks for transport to AES of NC, LLC located in Greenville, North Carolina for final disposal. The soil disposal manifests are provided in Appendix
B. A total of 21 soil confirmation samples were collected from the sidewalls and base of the excavation area. All samples were analyzed in the field for TPH as diesel range organics (DRO) and gasoline range organics (GRO) using the QED UVF supplied by REDLABS. The excavation areas were extended vertically and horizontally until soil confirmation samples exhibited TPH DRO
concentrations less than the NCDEQ Soil Action Level of 100 mg/kg and TPH GRO concentrations less than the NCDEQ Soil Action Level of 50 mg/kg. Sample locations are shown in Figure 2. The analytical results for the soil confirmation samples are summarized in Table 1 and laboratory
analytical reports are provided in Appendix C. As shown on Table 1, the impacted soils were successfully removed to below applicable soil screening levels. G. Conclusions Approximately 45 gallons of diesel fuel was released from a transport truck as the result of a traffic
accident on the southbound on-ramp from I-85 to I-485 heading towards Matthews in Charlotte, Mecklenburg County, North Carolina. Excavation activities were limited to the western shoulder of the southbound on-ramp from I-85 to I-485 heading towards Matthews. Soil was excavated over an area of approximately 665-square feet to a maximum depth of approximately 1.0 feet bgs. A total of 21 soil confirmation samples were collected and analyzed on-site for TPH-DRO and TPH-GRO. A total of 18.61 tons of soil were excavated and transported off-site for treatment and disposal in accordance with local, state, and federal requirements. Based on confirmation soil sampling results, concentrations of TPH-DRO and TPH-GRO at the base of the excavation are below detectable levels
and/or below the state action limits. Mid-Atlantic recommends that the incident be closed and that a no further action letter be issued for this release.

FIGURES
^_
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TOPOGRAPHIC SITE MAPCONCORD DIESEL SPILL RELEASENORTHERN I-485 AND I-85 INTERCHANGE CHARLOTTE, NORTH CAROLINA
DRAWN BY:
DATE:
ENG. CHECK:
JOB NO:
APPROVAL:
DRAFTCHECK:GIS NO:
DWG NO:
REFERENCES:
SCALE:
1. HARRISBURG, NC DIGITAL RASTER GRAPHICS, USGS. SCANNED FROM 1:24,000-SCALE TOPOGRAPHIC MAPS, PUBLISHED 2019, USGS.2. NCDOT3. PROPERTY BOUNDARY DATA FROM NC ONEMAP.
CONTOUR INTERVAL = 10 FEET
0 1,000 2,000Feet
SITE
1:12,000

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JULY 2021
021H1586.00
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APPROXIMATE EXTENT OFCONTAMINATION
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SITE AND SAMPLE LOCATION MAP
CONCORD DIESEL SPILL RELEASE
NORTHERN I-485 AND I-85 INTERCHANGE CHARLOTTE, NORTH CAROLINA
DRAWN BY:DATE:
ENG.
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JOB NO:
APPROVAL:
DRAFT
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GIS NO:
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021H1586.00
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REFERENCES:
1. PROPERTY LINE DATA FROM WAKE CO. GIS. 2. AERIAL IMAGERY FROM NC ONEMAP. 3. MID-ATLANTIC FIELD NOTES.
1 inch equals 20 feet
KRC JULY 2021
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TABLES
Sample Location Sample ID Sample DateSample Depth (inches bgs)TPH DRO Concentration (mg/kg) TPH GRO Concentration (mg/kg)SS-8 (0.5) 7/15/2021 0.5 2768.6SS-11 (0.5) 7/15/2021 0.5 20.375.1SS-1 (0.5) 7/15/2021 0.5 4.4 <0.4SS-2 (0.5) 7/15/2021 0.5 18.6 <0.5SS-3 (0.5) 7/15/2021 0.5 17.5 <0.4SS-4 (0.5) 7/15/2021 0.5 21.5 <0.6SS-5 (0.5) 7/15/2021 0.5 18.4 <0.5SS-6 (0.5) 7/15/2021 0.5 0.6 <0.4SS-7 (0.5) 7/15/2021 0.5 0.8 <0.6SS-8 (0.5) 7/15/2021 1 17.6 <0.5SS-9 (0.5) 7/15/2021 1 2.4 <0.5SS-10 (0.5) 7/15/2021 0.5 4.4 <0.6SS-11 (1.0) 7/15/2021 1 1.0 <0.7SS-12 (0.5) 7/15/2021 0.5 1.6 <0.7SS-13 (0.5) 7/15/2021 0.5 28.3 <0.8SS-14 (0.5) 7/15/2021 0.5 2.7 0.6SS-15 (0.5) 7/15/2021 0.5 3.3 <0.5SS-16 (0.5) 7/15/2021 0.5 2.0 <0.6SS-17 (0.5) 7/15/2021 0.5 1.5 <0.6SS-18 (0.5) 7/15/2021 0.5 0.3 <0.6SS-19 (0.5) 7/15/2021 0.5 1.3 <0.5SS-20 (0.5) 7/15/2021 0.5 1.9 <0.7SS-21 (0.5) 7/15/2021 0.5 1.9 <0.6 Notes:TPH-DRO values over screening value of 100 mg/kg shown in boldTPH-GRO values over screening value of 50 mg/kg shown in boldft bgs - feet below ground surfacemg/kg - milligrams per kilogramTPH - Total Petroleum HydrocarbonsDRO - Diesel Range Organics GRO - Gasoline Range Organics BRL - Below Reporting LimitTable 1Ultraviolet Fluorescence Analytical Results, July 15, 2021Southbound Interstate Highway 485 On-RampCharlotte, North CarolinaConfirmation SamplesScreening Samples

APPENDIX A

PHOTO LOG
Initial Assessment Report July 15, 2021
I-495 On Ramp to Matthews, Charlotte, NC Appendix A

Photograph 1: View of location of accident and vehicle fire.  

Photograph 2: View of site prior to excavation activity.  

APPENDIX B

SOIL DISPOSAL MANIFESTS

APPENDIX C

ULTRAVIOLET FLUORESCENCE AND LABORATORY ANALYTICAL DATA

Hydrocarbon Analysis ResultsClient:HEPACOSamples takenThursday, July 15, 2021Address:2711 Burch DrSamples extractedThursday, July 15, 2021Charlotte, NCSamples analysedThursday, July 15, 2021Contact:Darius GradyOperatorTroy L. HolzschuhProject:I-485 ConcordH09382Matrix Sample IDDilution usedBTEX GRO DRO TPHTotal Aromatics16 EPA PAHsBaP HC Fingerprint MatchC6-C9 C5-C10 C10-C35 C5-C35 C10-C35 C5:10C10:C18C18+Soil SS-1 (0.5) 18.0 <0.4 <0.4 4.4 4.4 3 0.1 <0.001 0 91.8 8.2 V.Deg.PHC 87.3%,(FCM)Soil SS-2 (0.5) 21.0 <0.5 <0.5 18.6 18.6 16.1 0.7 0.003 0 97 3 Deg.Light Fuel 90.5%,(FCM)Soil SS-3 (0.5) 19.0 <0.4 <0.4 17.5 17.5 0.7 0.027 0.001 0 87.7 12.3 V.Deg.Light Fuel 78.1%,(FCM)Soil SS-4 (0.5) 24.0 <0.6 <0.6 21.5 21.5 1 0.05 0.001 0 88.3 11.7 Deg Fuel 60.8%,(FCM)Soil SS-5 (0.5) 20.0 <0.5 <0.5 18.4 18.4 0.4 0.026 0.001 0 81.6 18.4 V.Deg.Light Fuel 83.7%,(FCM)Soil SS-6 (0.5) 18.0 <0.4 <0.4 0.6 0.6 0.2 0.007 <0.005 0 100 0 77.7%,(FCM)Soil SS-7 (0.5) 25.0 <0.6 <0.6 0.8 0.8 0.3 0.018 <0.0 0 76.6 23.4 V.Deg.PHC 76.1%,(FCM)Soil SS-8 (0.5) 21.0 <0.5 68.6 27 95.6 15 0.6 0.002 84.6 14.9 0.5 Deg.Light Fuel 69.4%,(FCM),(BO)Soil SS-9 (1.0) 20.0 <0.5 <0.5 2.4 2.4 1.6 0.07 0.001 0 92.5 7.5V.Deg.Light Fuel 87.9%,(FCM),(BO)Soil SS-10 (0.5) 25.0 <0.6 <0.6 4.4 4.4 1.4 0.06 0.001 0 97.1 2.9 No Match foundInitial Calibrator QC checkOKFinal FCM QC CheckOK 88.0%Analysis by QED HC‐1 AnalyserConcentration values in mg/kg for soil and mg/L for water samples. Soil values uncorrected for moisture or stone content. Fingerprints provide a tentative hydrocarbon identification.Abbreviations :- FCM = Results calculated using Fundamental Calibration Mode : % = confidence for hydrocarbon identification : (PFM) = Poor Fingerprint Match : (T) = Turbid : (P) = Particulate detectedHC = Hydrocarbon : PHC = Petroleum HC : FP = Fingerprint only : % Ratios estimated carbon number proportions : (OCR)/(Q) = Outside cal range, values and HC match estimates : ND = Not Detected(B) = Blank Drift : (M) = Adjusted value : (SBS)/(LBS) = Site Specific or Library Background Subtraction applied to result : (BO) = Background Organics detected : SB = sample selected as site background% Ratios
QED Hydrocarbon Fingerprints
Project: I‐485 Concord Thursday, July 15, 2021
Hydrocarbon Analysis ResultsClient:HEPACOSamples takenThursday, July 15, 2021Address:2711 Burch Dr.Samples extractedThursday, July 15, 2021Charlotte, NCSamples analysedThursday, July 15, 2021Contact:Darius GradyOperatorTroy L. HolzschuhProject:Concord I-485H09382Matrix Sample IDDilution usedBTEX GRO DRO TPHTotal Aromatics16 EPA PAHsBaP HC Fingerprint MatchC6-C9 C5-C10 C10-C35 C5-C35 C10-C35 C5:10C10:C18C18+Soil SS-8 (1.0) 20.0 <0.5 <0.5 17.6 17.6 1.6 0.07 <0.005 0 97 3 Deg.Fuel 90.2%,(FCM),(BO)Initial Calibrator QC checkOKFinal FCM QC CheckOK 92.5%Analysis by QED HC‐1 AnalyserConcentration values in mg/kg for soil and mg/L for water samples. Soil values uncorrected for moisture or stone content. Fingerprints provide a tentative hydrocarbon identification.Abbreviations :- FCM = Results calculated using Fundamental Calibration Mode : % = confidence for hydrocarbon identification : (PFM) = Poor Fingerprint Match : (T) = Turbid : (P) = Particulate detectedHC = Hydrocarbon : PHC = Petroleum HC : FP = Fingerprint only : % Ratios estimated carbon number proportions : (OCR)/(Q) = Outside cal range, values and HC match estimates : ND = Not Detected(B) = Blank Drift : (M) = Adjusted value : (SBS)/(LBS) = Site Specific or Library Background Subtraction applied to result : (BO) = Background Organics detected : SB = sample selected as site background% Ratios
QED Hydrocarbon Fingerprints
Project:
Hydrocarbon Analysis ResultsClient:HEPACOSamples takenThursday, July 15, 2021Address:2711 Burch DrSamples extractedThursday, July 15, 2021Charlotte, NCSamples analysedThursday, July 15, 2021Contact:Darius GradyOperatorTroy L. HolzschuhProject:I-485 ConcordH09382Matrix Sample IDDilution usedBTEX GRO DRO TPHTotal Aromatics16 EPA PAHsBaP HC Fingerprint MatchC6-C9 C5-C10 C10-C35 C5-C35 C10-C35 C5:10C10:C18C18+Soil SS-14 (0.5) 26.0 <0.6 <0.6 2.7 2.7 1.3 0.04 0.001 0 90.6 9.4 V.Deg.PHC 78.1%,(FCM),(BO)Soil SS-13 (0.5) 32.0 <0.8 <0.8 28.3 28.3 3.4 0.16 0.001 0 95.2 4.8 Deg.Light Fuel 79.8%,(FCM),(BO)Soil SS-12 (0.5) 30.0 <0.7 <0.7 1.6 1.6 0.7 0.031 0.001 0 83.3 16.7 V.Deg.PHC 84.3%,(FCM)Soil SS-11 (0.5) 23.0 <0.5 75.1 20.3 95.4 2.9 0.18 0.001 96.8 3 0.2 Deg.Light Fuel 52.4%,(FCM),(BO)Initial Calibrator QC checkOKFinal FCM QC CheckOK 92.8%Analysis by QED HC‐1 AnalyserConcentration values in mg/kg for soil and mg/L for water samples. Soil values uncorrected for moisture or stone content. Fingerprints provide a tentative hydrocarbon identification.Abbreviations :- FCM = Results calculated using Fundamental Calibration Mode : % = confidence for hydrocarbon identification : (PFM) = Poor Fingerprint Match : (T) = Turbid : (P) = Particulate detectedHC = Hydrocarbon : PHC = Petroleum HC : FP = Fingerprint only : % Ratios estimated carbon number proportions : (OCR)/(Q) = Outside cal range, values and HC match estimates : ND = Not Detected(B) = Blank Drift : (M) = Adjusted value : (SBS)/(LBS) = Site Specific or Library Background Subtraction applied to result : (BO) = Background Organics detected : SB = sample selected as site background% Ratios
QED Hydrocarbon Fingerprints
Project: I‐485 Concord Thursday, July 15, 2021
Hydrocarbon Analysis ResultsClient:HEPACOSamples takenThursday, July 15, 2021Address:2711 Burch DrSamples extractedThursday, July 15, 2021Charlotte, NCSamples analysedThursday, July 15, 2021Contact:Darius GradyOperatorTroy L. HolzschuhProject:I-485 ConcordH09382Matrix Sample IDDilution usedBTEX GRO DRO TPHTotal Aromatics16 EPA PAHsBaP HC Fingerprint MatchC6-C9 C5-C10 C10-C35 C5-C35 C10-C35 C5:10C10:C18C18+Soil SS-11 (1.0) 28.0 <0.7 <0.7 1 1 0.9 0.1 <0.006 0 91.4 8.6 Residual PHC,(BO)Soil SS-21 (0.5) 25.0 <0.6 <0.6 1.9 1.9 0.8 0.04 0.001 0 80.9 19.1 V.Deg.PHC 88.6%,(FCM)Soil SS-20 (0.5) 30.0 <0.7 <0.7 1.9 1.9 0.8 0.04 <0.0 0 79.2 20.8 V.Deg.PHC 82%,(FCM)Soil SS-19 (0.5) 23.0 <0.5 <0.5 1.3 1.3 0.5 0.029 0.001 0 77.5 22.5 V.Deg.PHC 75.9%,(FCM)Soil SS-18 (0.5) 26.0 <0.6 <0.6 0.3 0.3 0.17 0.01 0.001 0 81.6 18.4 V.Deg.PHC 68%,(FCM),(BO)Soil SS-17 (0.5) 25.0 <0.6 <0.6 1.5 1.5 0.9 0.03 <0.004 0 86.5 13.5V.Deg.Light Fuel 80.9%,(FCM),(BO)Soil SS-16 (0.5) 24.0 <0.6 <0.6 2 2 1.9 0.08 <0.007 0 91.3 8.7V.Deg.Light Fuel 83.3%,(FCM),(BO)Soil SS-15 (0.5) 22.0 <0.5 <0.5 3.3 3.3 2.9 0.13 0.002 0 90.3 9.7V.Deg.Light Fuel 86.9%,(FCM),(BO)Initial Calibrator QC checkOKFinal FCM QC CheckOK 107.6%Analysis by QED HC‐1 AnalyserConcentration values in mg/kg for soil and mg/L for water samples. Soil values uncorrected for moisture or stone content. Fingerprints provide a tentative hydrocarbon identification.Abbreviations :- FCM = Results calculated using Fundamental Calibration Mode : % = confidence for hydrocarbon identification : (PFM) = Poor Fingerprint Match : (T) = Turbid : (P) = Particulate detectedHC = Hydrocarbon : PHC = Petroleum HC : FP = Fingerprint only : % Ratios estimated carbon number proportions : (OCR)/(Q) = Outside cal range, values and HC match estimates : ND = Not Detected(B) = Blank Drift : (M) = Adjusted value : (SBS)/(LBS) = Site Specific or Library Background Subtraction applied to result : (BO) = Background Organics detected : SB = sample selected as site background% Ratios
QED Hydrocarbon Fingerprints
Project: I‐485 Concord Thursday, July 15, 2021