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Home My WebLink AboutWS-9069_44302_CA_IAR_20140724UST Closure and Initial Abatement Action Report Pagetown Exxon Progress Project No. 1014029.002 July 24, 2014 i TABLE OF CONTENTS A. SITE IDENTIFICATION ....................................................................................................................1 B. SITE HISTORY AND CHARACTERIZATION................................................................................2 C. SITE CHECK.......................................................................................................................................2 D. UST CLOSURE RESULTS.................................................................................................................2 E. INITIAL RESPONSE AND ABATEMENT ACTION.......................................................................3 F. EXCAVATION OF CONTAMINATED SOIL...................................................................................4 G. LABORATORY ANALYTICAL RESULTS......................................................................................4 H. GROUNDWATER AND SURFACE WATER INVESTIGATION...................................................5 I. FREE PRODUCT INVESTIGATION AND RECOVERY REPORT................................................5 J. CONCLUSIONS..................................................................................................................................5 K. RECOMMENDATIONS.....................................................................................................................6 L. QUALIFICATIONS OF REPORT......................................................................................................6 FIGURES Figure 1 – Topographic Site Map Figure 2 – Site Plan Figure 3 – Excavation Sample Location Map TABLES Table 1 – Site History, UST/AST System Information Table 2 – Site History, UST Owner/Operator Information Table 3 – Summary of Soil Analytical Results APPENDIX Site Photographs UST-2 and UST-3 Forms Certificate of Waste Liquids Disposal Tank Disposal Manifest Soil Disposal Manifest and Weight Verification Tickets Laboratory Data Sheets and Chain-of-Custody Record UST Closure and Initial Abatement Action Report Pagetown Exxon Progress Project No. 1014092.001 July 24, 2014 2 B. SITE HISTORY AND CHARACTERIZATION Progress Environmental, Inc. (Progress) was contracted by Eden Oil Company to conduct underground storage tank (UST) closure activities at the Pagetown Exxon located at 8035 Cherry Grove Road South in Reidsville, Caswell County, North Carolina (Figure 1). The site consists of a convenience store which stores petroleum products in USTs for retail sale. Prior to removal of the UST systems, aboveground storage tanks were installed to store the kerosene and diesel fuel. The site is located in a commercial and residential area of rural Caswell County. The surrounding properties are served by water-supply wells within 1,500 feet of the source area. The closure activities included the removal of one 1,000-gallon kerosene UST and one 2,000-gallon diesel UST. Information regarding the on-site USTs is presented below: Table 1 Site History, UST/AST System Information Tank No. Installation Date Capacity (gallons) Construction Materials Dimensions (inches) Removal Date Contents Previous Contents 1 4/30/198 6,000 Steel 63” x 216” Present Gasoline Gasoline 2 4/30/1989 8,000 Steel 63” x 216” Present Gasoline Gasoline 3 4/30/1989 4,000 Steel 63” x 216” Present Gasoline Gasoline 4 4/30/1989 2,000 Steel (STP-3) 64” x 12’ 6/16/14 Diesel Diesel 5 4/30/1989 1,000 Steel (STP-3) 64” x 6’ 6/16/14 Kerosene Kerosene 6 2014 (AST) 500 Kerosene Kerosene 7 2014 (AST) 1,500 Steel 64” x 12’ Present Diesel Diesel Table 2 Site History, UST Owner/Operator Information Owner’s Name Address Phone Number Dates of Ownership Eden Oil Company P.O. Box 1375 Reidsville, NC 27323 (336) 349-8228 1989-Present C. SITE CHECK A site check has not been completed in regard to the UST system. D. UST CLOSURE RESULTS On June 15, 2014 Shamrock Environmental washed the interior of the USTs and evacuated the fluids (approximately 22 gallons) via a vacuum truck prior to UST removal. On June 16 and 17, 2014 RABCO, Inc. excavated the overburden soil from the vicinity of the kerosene and diesel fuel USTs using a trackhoe. Progress personnel provided oversight during excavation activities. The USTs were UST Closure and Initial Abatement Action Report Pagetown Exxon Progress Project No. 1014092.001 July 24, 2014 3 encountered approximately three feet below land surface (bls). Upon removal, Progress observed the condition of the USTs. Progress did not note significant corrosion or perforations on the USTs; however, areas of corrosion were noted. Apparent impacted soil was also noted in the vicinity of the dispensers. The USTs were removed and loaded onto a flatbed trailer and transported to Greer Recycling, a recycling facility located in Reidsville, North Carolina on June 16, 2014. The excavation for the USTs was approximately 15 feet by 15 feet by 20 feet deep. Petroleum odors were noted in the soil above and below the USTs and visible evidence of stained soil was not observed. Apparent free product was not noted beneath the USTs on the water that entered the excavation. At the time of the UST removal it was not clear if the water in the basin was groundwater or perched water that had collected in the gravel surrounding the USTs. A total of three soil samples were obtained from the bucket of the trackhoe for analysis for total petroleum hydrocarbons as gasoline and diesel range TPH including three soil samples (CS-1 through CS-3) collected from beneath the USTs. Please note, soil samples were collected from beneath the dispenser during a previous site assessment and did not indicate the presence of soil contamination. The majority of the fiberglass product lines were located over the USTs and surrounded by pea gravel. The locations of the soil samples collected during UST closure are shown on Figure 2. After obtaining each soil sample, the soil samples were transferred to laboratory-prepared containers and immediately placed on ice. A label with the facility name, soil sample number, date and time of sampling, and parameter to be analyzed was affixed to each container for identification. New disposable latex gloves were used to maintain sample integrity during the sampling process. Proper preservation methods and chain-of- custody procedures were followed throughout the sampling process. Analytical results were compared to the TPH Action Levels of 10 milligrams per kilogram (mg/Kg) as presented in the NCDENR Underground Storage Tank Section Guidelines for Site Checks, Tank Closure, and Initial Response and Abatement dated December 1, 2008, Change 3. Laboratory analysis soil sample CS-3 indicated the presence of TPH-D (37,500 mg/Kg) and TPH-G (2,940 mg/Kg) at concentrations that exceed the North Carolina Action Levels. E. INITIAL RESPONSE AND ABATEMENT ACTION On June 16, 2014, one 2,000-gallon diesel fuel UST and one1,000-gallon kerosene UST were removed from the site. Soils with strong petroleum odors were noted beneath the kerosene UST. Apparent signs of impact were not noted immediately below the diesel fuel UST or the associated dispenser. Note that UST Closure and Initial Abatement Action Report Pagetown Exxon Progress Project No. 1014092.001 July 24, 2014 4 over-excavation activities were limited due to the presence of the convenience store to the south of the UST location and limitations of the trackhoe (approximately 20 feet bls). F. EXCAVATION OF CONTAMINATED SOIL RABCO, Inc. conducted soil excavation activities on June 16 and 17, 2014 following removal of the UST systems. Soil excavation activities were completed by RABCO, Inc. utilizing a trackhoe. Accessible contaminated soil was loaded into awaiting dump trucks and transported to the Earthtec of NC, Inc. facility in Bear Creek, North Carolina for proper disposal. Approximately 97.76 tons of contaminated soil were excavated in an effort to remove the impacted soil. Note that over-excavation activities were limited due to the convenience store building located to the south of the excavation and physical limits of the trackhoe. Upon completion of the soil excavation activities, the over-excavation was rectangular in shape. The former UST basin over-excavation had an approximate width of 15 feet, an approximate length of 15 feet, and a depth of approximately 20 feet bgs. Progress collected soil samples (N-1, E-1, S- 1, W-1, and B-1 Figure 3) from the sidewalls and the base of the excavation to be analyzed for volatile organic compounds (VOCs) by EPA Method 8260/5035, semi-volatile organic compounds using EPA Method 8270, and for volatile and extractable petroleum hydrocarbons (VPH and EPH) by the Massachusetts Department of Environmental Protection (MADEP) Methods. The sidewall soil samples were collected from an approximate depth of approximately 15 feet bls. The soil samples were appropriately packaged and delivered to Research and Analytical Laboratories, Inc. (R&A) in Kernersville, North Carolina. Proper chain-of-custody procedures were maintained throughout the sample collection and transportation process. Following the collection of soil samples, RABCO, Inc. backfilled the excavation with imported clean fill material. The ground surface of the excavation was topped with gravel. G. LABORATORY ANALYTICAL RESULTS Laboratory analysis of soil samples CS-1 and CS-2 collected beneath the diesel fuel UST did not indicate the presence of TPH-G or TPH-D. Laboratory analysis of soil sample CS-3 indicated the presence of TPH-D (37,500 mg/Kg) and TPH-G (2,940 mg/Kg) at concentrations that exceed the North Carolina Action Level. Laboratory analysis of soil samples N-1, E-1, and W-1 did not detect targeted compounds above their respective Soil-to-Groundwater Maximum Soil Contaminant Concentrations (MSCCs). Laboratory analysis of soil sample S-1 detected p-isopropyltoluene (0.858 mg/Kg), naphthalene (1.03 mmg/Kg), total xylenes (4.63 mg/Kg), 1-methylnaphthalene (0.705 mg/Kg), C9-C22 Aromatics (300 UST Closure and Initial Abatement Action Report Pagetown Exxon Progress Project No. 1014092.001 July 24, 2014 5 g/Kg), and C9-C18 Aliphatics (4,387 mg/Kg) above their respective Soil-to-Groundwater MSCCs. The concentration of C9-C18 Aliphatics exceeds its Residential Soil Cleanup Level. Laboratory analysis of soil sample B-1 detected p-isopropyltoluene (1.43 mg/Kg), naphthalene (2.48 mg/Kg), n-propylbenzene (1.73 mg/Kg), 1,2,4-trimethylbenzene (13.4 mg/Kg), total xylenes (11.2 mg/Kg), 1-methylnaphthalene (2.81 mg/Kg), 2-methylnaphthalene (3.71 mg/Kg), naphthalene (2.16 mg/Kg), C5-C8 Aliphatics (101 mg/Kg), C9-C22 Aromatics (290.8 mg/Kg), and C9-C18 Aliphatics (1,202 mg/Kg) above their respective Soil-to-Groundwater MSCCs. A summary of the laboratory analytical results is included in Table B-3. Copies of the laboratory data sheets and chain-of-custody record are included in the Appendix. H. GROUNDWATER AND SURFACE WATER INVESTIGATION Groundwater was not encountered during the excavation activities. I. FREE PRODUCT INVESTIGATION AND RECOVERY REPORT Free product was not noted during the UST removal activities. J. CONCLUSIONS At the completion of the initial abatement activities, Progress concludes the following: • Progress was contracted to supervise the removal of one 2,000-gallon diesel fuel UST and one 1,000- gallon kerosene UST from the subject site. • Progress collected a total of three soil samples from beneath the USTs. The soil samples were submitted to a North Carolina certified laboratory to be analyzed for gasoline and diesel range TPH. Laboratory analysis of soil sample CS-3 detected gasoline and diesel range TPH above their North Carolina Action Levels. • Approximately 97.76 tons of petroleum-impacted soil was excavated from the site and transported to Earthtec of NC, a permitted disposal facility. • Following the excavation of the contaminated soil, Progress collected soil samples (N-1, E-1, S-1, W- 1, and B-1) from the sidewalls and base of the excavation. The over-excavation activities were limited due to the presence of the building to the south of the excavation and the physical limits of the trackhoe. Laboratory analysis of risk-based soil samples S-1 and B-1 detected targeted compounds above their respective Soil-to-Groundwater MSCCs. The concentration of C9-C18 Aliphatics detected in soil sample S-1 exceeds its Residential Soil Cleanup Level. UST Closure and Initial Abatement Action Report Pagetown Exxon Progress Project No. 1014092.001 July 24, 2014 6 K. RECOMMENDATIONS Progress recommends submitting a copy of this report to the Winston-Salem Regional Office of the NCDENR. L. QUALIFICATIONS OF REPORT The activities and evaluative approaches used in this assessment are consistent with those normally employed in projects of this type. Our evaluation of site conditions has been based on our understanding of the site project information and the data obtained during our field activities. FIGURES Figure 1 Topographic Site Map Pagetown Exxon 8035 Cherry Grove Road Reidsville, Caswell County, North Carolina Project: Pagetown Exxon Client: Eden Oil Company Progress Job #: 1014029.002 P.O. Box 5884 Winston-Salem, NC 27113 Telephone: (336) 722-9999 Fax: (336) 722-9998 www.progressenvironmental.com United States Department of the Interior USGS 7.5 Minute Series Topographic Map Contour Interval: 10 feet Scale: 1”=2000’ Cherry Grove, North Carolina Date: 1997 Date: July 2014 SITE Site REV 0 DRAWINGTITLE DRAWINGNUMBER FIGURE2 LEGEND Soil SampleLocation DispenserCanopy Product Dispenser SitePlanPagetownExxon 8035 CherryGroveRoadReidsville, NorthCarolina DR.: JAB MAR14 CK.: APP'D.: SCALE:SHOWN PROGRESSNO.: 1014029.001 S-1 www.progressenvironmental.com P.O. Box5884Winston-Salem,NorthCarolina27113(336)722-9999 Progress Environmental,Inc. N EW GP-4 GP-2GP-3 GP-1 GP-5 REV0DRAWING TITLEDRAWING NUMBERFIGURE 3LEGENDSoil Sample LocationLimits of ExcavtionExcavation Sample Location MapPagetown Exxon8035 Cherry Grove RoadReidsville, North CarolinaDR.: JABJULY 14 CK.:APP'D.:SCALE: SHOWNPROGRESS NO.: 1014029.002S-1www.progressenvironmental.comP.O. Box 5884Winston-Salem, North Carolina 27113(336) 722-9999Progress Environmental, Inc.NEWS-1W-1N-1E-1B-1 TABLES Date Collected (mm/dd/yy)Sample Depth (ft BGS)CS-1 06/16/14 8 BQL BQL NANA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NACS-2 06/16/14 8 BQL BQL NANA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NACS-3 06/16/14 82,940 37,500NANA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NAB-1 06/17/14 21 NA NA1.931.36 1.51 1.43 2.48 1.73 2.10 13.4 4.06 11.2BQL2.81 3.71 2.16BQL101 290.8 1,202BQLN-1 06/17/14 15 NA NA BQLBQL BQL BQL BQL BQL BQL BQL BQL BQL BQL B BQL BQL BQL BQL BQL BQL BQLE-1 06/17/14 15 NA NA BQLBQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL29.9BQLS-1 06/17/14 15 NA NA1.160.977 0.724 0.858 1.03 1.04BQL7.55 2.24 4.63BQL0.705 0.811BQL BQL57.1 300 4,387 22.5W-1 06/17/14 15 NA NA BQLBQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQL BQLBQL10 10 NANA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NANA NA4.3 3.3 4.9 0.12 0.16 1.7 4.3 8.5 8.3 4.6 56 0.004 3.6 0.16 270 68 31 540 #NA NA626 626 1,560 100 313 626 1,200 782 782 3,129 469 20 63 313 469 939 469 1,500 31,000NA NA16,350 16,350 40,000 4,000 8,176 16,350 3,200 20,440 20,440 81,760 12,264 100 1,635 8,176 12,264 24,528 12,264 40,000 810,000NOTES:Concentration exceeds Soil-to-Groundwater MSCCs or TPH Action LevelsConcentration exceeds Residential Soil Cleanup LevelsND = Not Detectedvalues shown in mg/KgMSCC = maximum soil contaminant concentrationft. BGS = feet below ground surfacemg/kg =milligrams per kilogram# = Health based level > 100%NE = Not EstablishedTPH as DieselTPH Soil Action Level (mg/Kg)Table 3Summary of Soil Analytical Results Pagetown Exxon2-Methylnaphthalenesec-ButylbenzeneAnalytical MethodVPH & EPH MADEP MethodsNaphthaleneNaphthaleneTPH as GasolineC19-C36 AliphaticsC9-C18 AliphaticsC5-C8 AliphaticsC9-C22 Aromatics82701-Methylnaphthalene1,3,5-TrimethylbenzenePhenanthareneTotal xylenes82601,2,4-TrimethylbenzenePyreneIndustrial/Commercial Soil Cleanup Levels (mg/Kg)Contaminant of ConcernSample IDSoil-to-Groundwater MSCC (mg/Kg)Residential Soil Cleanup Levels (mg/Kg)EthylbenzeneToluenen-Butylbenzenep-Isopropyltoluenen-Propylbenzene APPENDIX Phase I Environmental Site Assessment – Pagetown Exxon 8035 Cherry Grove Road Reidsville, Caswell County, North Carolina Progress Project No. 1014029.002 Photograph No. 1. View of the excavation of the concrete overlying the USTs. Photograph No. 2. View of the diesel fuel UST after removal. Phase I Environmental Site Assessment – Pagetown Exxon 8035 Cherry Grove Road Reidsville, Caswell County, North Carolina Progress Project No. 1014029.002 Photograph No. 3. View of the kerosene UST after removal. Photograph No. 4. View of the bottom of the kerosene UST after removal. Phase I Environmental Site Assessment – Pagetown Exxon 8035 Cherry Grove Road Reidsville, Caswell County, North Carolina Progress Project No. 1014029.002 Photograph No. 5. View of the excavation following removal of the USTs. Photograph No. 6. View of the excavation following excavation of accessible contaminated soil.