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HomeMy WebLinkAboutRA-1119_7242_CA_RPTS_202003172725 E. Millbrook Road., Suite 121 Raleigh, North Carolina 27604 Telephone 919-871-0999 Fax 919-871-0335 www.atcgroupservices.com March 17, 2020 Ms. Linda Blalock North Carolina Department of Environmental Quality Division of Waste Management – Underground Storage Tank Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646 Re: Well Abandonment Letter Report Former Haithcock Grocery Southeast Corner of US Hwy 158 and Tulip Lane Macon, Warren County, North Carolina NCDEQ Incident No. 7242 ATC Project No. SLP0724205 Dear Ms. Blalock: ATC Associates of North Carolina, P.C. (ATC) has completed well abandonment activities for the former Haithcock Grocery. The well abandonment was performed based on a December 20, 2019 Task Authorization (TA-05) by the Trust Fund Branch of the Underground Storage Tank (UST) Section, Division of Waste Management, North Carolina Department of Environmental Quality (NCDEQ). The work is performed as part of State Lead Contract #N17004 between NCDEQ and ATC. The former Haithcock Grocery is located at the southeast corner of the intersection of US Highway 158 and Tulip Lane in Macon, Warren County, North Carolina. The site consists of a two story building with concrete and gravel parking occupied by Macon Auto Sales and is currently owned by Tammy Parker. A total of seven USTs (one 2,000-gallon diesel, three 6,000-gallon gasoline, one 1,000-gallon gasoline, one 550-gallon kerosene, and one 2,000-gallon gasoline) were closed by removal in 1992. Four monitoring wells (MW-1, MW-2, MW-3, and MW-4) are located at the site. A site topographic map is included as Figure 1. The approximate locations of the former USTs and monitoring wells are shown on Figure 2. ATC prepared a Fate & Transport Modeling Report dated October 31, 2019. Based on the results of the fate & transport modeling, the nearest active water supply well (P-8), which is located cross-gradient of the site and used for drinking, will not be impacted by the contaminants at the site. Therefore, ATC recommended closure of the Haithcock Grocery incident and that groundwater usage at the site be restricted. On February 5, 2020, Regional Probing Services mobilized to the site to abandon monitoring wells MW-1, MW-2, MW-3, and MW-4. Monitoring well construction details are included in Table 1. The monitoring wells were filled with hydrated bentonite and capped with concrete. The well abandonment records are included in Appendix A. Well Abandonment Letter Report March 17, 2020 Former Haithcock Grocery NCDEQ Incident #7242 If you have any questions or require additional information, please contact our office at (919) 871-0999. Sincerely, ATC Associates of North Carolina, P.C. Elizabeth Allyn Ashley M. Winkelman, P.G. Project Manager Senior Project Manager Attachments: Table 1 – Well Construction and Groundwater Elevation Data Figure 1 – Site Topographic Map Figure 2 – Site Map Appendix A – Well Abandonment Records TABLE TABLE 1 WELL CONSTRUCTION AND GROUNDWATER ELEVATION DATA FORMER HAITHCOCK GROCERY SOUTHEAST CORNER OF INTERSECTION OF HWY 158 AND TULIP LANE MACON, WARREN COUNTY, NORTH CAROLINA NCDEQ INCIDENT #7242 Well ID Date Installed Well Casing depth (ft.) Screened Interval (ft BLS) Depth of Well (BLS) Top of Casing Elevation (ft.) Date Water Level Measured Depth to Water LNAPL Thickness (ft.) Groundwater Elevation Comments 100.00 2/2/07 33.49 NA 66.51 100.00 5/5/11 35.29 NA 64.71 100.00 8/10/14 33.38 NA 66.62 100.00 1/27/16 31.47 NA 68.53 100.00 10/27/16 31.75 NA 68.25 100.00 6/26/18 33.87 NA 66.13 100.00 4/17/19 29.41 NA 70.59 100.06 2/2/07 31.88 NA 68.18 100.06 5/5/11 35.36 NA 64.70 100.06 8/10/14 33.42 NA 66.64 100.06 1/27/16 31.53 NA 68.53 100.06 10/27/16 31.81 NA 68.25 100.06 6/26/18 33.94 NA 66.12 100.06 4/17/19 29.49 NA 70.57 99.57 2/2/07 31.50 NA 68.07 99.57 5/5/11 35.80 NA 63.77 99.57 8/10/14 NL NL NL 99.57 1/27/16 32.10 NA 67.47 99.57 10/27/16 99.57 6/26/18 34.11 NA 65.46 99.57 4/17/19 29.70 NA 69.87 100.60 2/2/07 32.38 NA 68.22 100.60 5/5/11 34.63 NA 65.97 100.60 8/10/14 NL NL NL 100.60 1/27/16 31.13 NA 69.47 100.60 10/27/16 31.95 NA 68.65 100.60 6/26/18 33.93 NA 66.67 100.60 4/17/19 29.15 NA 71.45 1. Monitoring well top-of-casing and historical water table elevations obtained from June 3, 2011 Groundwater Monitoring Report prepared by S&ME, Inc. 2. NL = Not Located 3. NA = Not Applicable 4. LNAPL = Light Non-Aqueous Phase Liquid 1/4/07 1/4/07 Not Measured/Inaccessible 40.0 MW-1 8/9/06 16.5 16.5-41.5 41.5 MW-4 20.0-40.0 20.0 20.0-40.0 MW-3 1/4/07 MW-2 40.020.0-40.020.0 40.0 20.0 FIGURES 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 SITE TOPOGRAPHIC MAP PROJECT NO: SLP0724203 DATE: 6/20/16 REVIEWED BY: AW FORMER HAITHCOCK GROCERY INCIDENT #7242 SOUTHEAST CORNER OF US HWY 158 AND TULIP LANE MACON, WARREN COUNTYR, NORTH CAROLINA Quadrangle: Macon, NC, USGS 2013 Topographic Map available at http://store.usgs.gov/ FIGURE 1 SCALE: 1:24 000 SITE APPENDIX A WELL ABANDONMENT RECORDS