The URL can be used to link to this page

Home My WebLink AboutWS-4643_15046_F_SLTA_20180508TA#: 01 NCDEQ – Division of Waste Management – UST Section –Trust Fund Branch TASK AUTHORIZATION May 08, 2018 To: ECS Southeast Incident Name: Save More #045 Contract #: N17006 Incident Number: TF-15046 Project Manager: John Lair Region: Winston-Salem Phone Number: County: Randolph Fax Number: City: Asheboro Authorized By: Herb Berger Regional Ofc. Contact: Phone Number: 919-707-8170 Phone Number: (336) 771-4608 Fax Number: Fax Number: (336) 771-4632 TOTAL TASK NOT TO EXCEED $3,920.00 TASK(S) TO BE PERFORMED: ECS is pleased to submit a TAR to collect a groundwater sample from nine monitoring wells (MW-1, MW-2, MW-3, MW-4, and MW-5, MW-6, MW-7, MW-8, and VEW-1). The samples will be analyzed using Standard Method 6200B. We will prepare a monitoring report. DEADLINE FOR TASK COMPLETION: July 1, 2018 November 15, 2017 Mr. Herb Berger NCDEQ, Division of Waste Management, UST Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646 RE: Task Authorization Request No. 1 – Save More #45 1424 North Fayetteville Street Asheboro, Randolph County, North Carolina NCDEQ Incident No.: 15046 NCDEQ Contract No. N17006 ECS Proposal No. 49-7521 Dear Mr. Berger: ECS Southeast, LLP (ECS) is pleased to submit this Task Authorization Request (TAR) to the North Carolina Departmental Quality (NCDEQ) for environmental services for the above referenced project. This proposal contains our project understanding, proposed scope of services, fees/costs, and schedule of work. PROJECT UNDERSTANDING The site is the Save More #45 located at 1424 North Fayetteville Street in Asheboro, North Carolina. The site is consists of one single-story building that is used as a retail petroleum facility and convenience store. On November 16, 1995, gasoline was discovered in the pump pit of one of the USTs located onsite. Approximately 126 gallons of gasoline and impacted water were removed from the pump pit and the UST pump was replaced. In January 1996, soil samples were collected around the UST system. Soil samples collected during the soil assessment contained petroleum hydrocarbons at concentrations exceeding the North Carolina standards. In 1998, a Phase I Limited Site Assessment was performed at the site. Soil borings were collected and a receptor survey was conducted. The soil samples did not contain targeted constituents above their respective North Carolina action levels. The receptor survey indicated that there were no water supply wells within 1,500 feet of the site. In April 2003, the UST system (two 6,000-gallon gasoline USTs, one 8,000-gallon gasoline UST, product lines, and dispensers) were removed from the site due to renovations. Soil samples were collected during removal and soil analytical results indicated petroleum hydrocarbons at concentrations exceeding the Soil-to-Groundwater Maximum Soil Contaminant Concentrations (MSCCs). Subsequent to removal, one 14,000-gallon gasoline UST, one 6,000-gallon gasoline UST, and one 4,000-gallon kerosene UST were installed on the site. Task Authorization Request No. 1 – Save More #45 1424 North Fayetteville Street Asheboro, Randolph County, North Carolina NCDEQ Incident No.: 15046 ECS Proposal No. 49-7521 November 15, 2017 2 In December 2003, a Phase II LSA was performed on the site. Monitoring wells MW-1 through MW-6 and VEW-1 were installed at the site and sampled. Multiple targeted constituents were detected in the groundwater samples at levels above their North Carolina 2L Groundwater Quality Standards (NC2LGWQS) and Gross Contamination Levels (GCL). An updated receptor survey indicated that there were no water supply wells within 1,500 feet of the site. In June 2004, a comprehensive site assessment (CSA) was performed on the site where twenty soil borings were drilled to collected soil samples. Soil analytical results indicated petroleum hydrocarbons at concentrations exceeding the Soil-to-Groundwater MSCCs. Groundwater sampling events were performed in March 2009 and January 2015. Multiple targeted constituents were detected in the groundwater samples at levels above their NC2LGWQS and GCLs. Free product was detected in monitoring well MW-1 during the sampling events. In May 2015, ATC supervised the installation of monitoring well MW-7 in order to delineate the groundwater impacted above the GCLs. The results of the groundwater sample collected from monitoring well MW-7 detected multiple targeted constituents above their NC2LGWQS and their GCLs. Free product was not detected in monitoring well MW-7. An oil absorbent boom was installed in monitoring well MW-1. ATC recommended installing an additional monitoring well to further try to delineate the hydrocarbon plume. In February 2016, ATC supervised the installation of monitoring well MW-8 located off-site across Rainbow Drive. The results of groundwater sample collected from monitoring well MW-8 did not detect targeted constituents above their laboratory reporting limits. In May 2016, ATC sampled and surveyed monitoring wells MW-1 through MW-8 and VEW-1. Survey results indicated that the groundwater flow direction is to the south-southwest. Free product was not detected in the monitoring wells. The results of groundwater samples collected from monitoring wells MW-1, MW-3, MW-4, MW-7, and VEW-1 detected multiple targeted constituents above their NC2LGWQS. Benzene exceeded its GCL in monitoring wells MW-1 and MW-3. MTBE exceeded its GCL in MW-1. ATC recommended conducting an AFVR event in monitoring wells MW-1 and MW3 in an attempt to reduce groundwater concentrations below GCLs. If the AFVR event is successful, ATC recommended MMPE events for future groundwater recovery activities. Concurrent with the recovery activities, ATC recommended continued semi-annual sampling of the monitoring wells. In addition if the current groundwater contaminant plume continues to not appear to be consistent with groundwater flow direction, ATC recommended resurveying the monitoring wells. SCOPE OF SERVICES ECS is pleased to submit a TAR to collect a groundwater sample from nine monitoring wells (MW-1, MW-2, MW-3, MW-4, and MW-5, MW-6, MW-7, MW-8, and VEW-1). The samples will be analyzed using Standard Method 6200B. We will prepare a monitoring report. Task Authorization Request No. 1 – Save More #45 1424 North Fayetteville Street Asheboro, Randolph County, North Carolina NCDEQ Incident No.: 15046 ECS Proposal No. 49-7521 November 15, 2017 3 TASK CODES AND COSTS ECS Field Services  1.010 - Project Review ........................................................................................................................ $500.00  4.031 - Cost for Sampling Monitoring Well: 1 wells @ $140/well ..................................................... $140.00  4.031 - Cost for Sampling Monitoring Well: 8 wells @ $80/well ....................................................... $640.00  12.010 - Consultant Mobilization: 1 trip @ $220.00/trip .................................................................. $220.00 Subtotal............................................... $1,500.00 Laboratory Services Task 4.090  Code 272 – 9 samples for VOCs using SM 6200B @ $62/well ........................................................... $558.00  Code 272 - 1 sample field blank for VOCs using SM 6200B @ $62/well ............................................. $62.00 Subtotal.................................................. $620.00 Reporting Services  6.090 Monitoring Report ................................................................................................................ $1,800.00 Subtotal............................................... $1,800.00 TOTAL ESTIMATED FEE .................................. $3,920.00 We look forward to the opportunity to work with you on this project. If you have any questions, or if we can be of any additional service, please contact us. Respectfully Submitted, ECS SOUTHEAST, LLP Ashley Barham Assistant Staff Project Manager abarham@ecslimited.com 336-478-1633 John M. Stewart, P.G. Chief Geologist Jstewart1@ecslimited.com 336-478-1621