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Home My WebLink AboutRA-971_6422_CA_LTTRPT_20150610 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 Tel: 919-871-0999 Fax: 919-871-0335 www.atcassociates.com N.C. Engineering License No. C-1598 1 June 10, 2015 Ms. Linda Blalock North Carolina Department of Environment and Natural Resources Division of Waste Management – Underground Storage Tank Section 1637 Mail Service Center Raleigh, North Carolina 27699 Re: Federal/State-Lead Letter Report J.C. Woody Store 295 Ashley Avenue Timberlake, Person County, North Carolina NCDENR Incident # 6422 ATC Project No. Z045000076 Dear Ms. Blalock: ATC Associates of North Carolina, P.C. (ATC) is pleased to submit the results of a groundwater sampling event conducted on March 3, 2015, at the J.C. Woody site located at 295 Ashley Avenue in Timberlake, North Carolina. A site topographic map is included as Figure 1. Currently on-site is a single-story building formerly used as a convenience store and retail gasoline facility. It is currently utilized as a small engine sales and repair shop. A site map is included as Figure 2. There are 32 water supply wells are located within 1,000 feet of the site, eight of which are used for drinking purposes, eight which are used for irrigation, twelve which are inactive, and four with an unknown use. The sampling event was performed based on a February 10, 2015, Task Authorization (TA-1) by the Trust Fund Branch of the Underground Storage Tank (UST) Section, Division of Waste Management, North Carolina Department of Environment and Natural Resources (NCDENR). The work is being performed as part of the State Lead Contract #N14004i between NCDENR and ATC. On March 3, 2015, ATC mobilized to the site to collect samples from monitoring wells MW-1 and MW-2. Field notes from the monitoring event are included in Appendix A. The monitoring well samples were collected in laboratory-supplied, preserved containers; entered into chain of custody control; placed on ice; and shipped to North Carolina-accredited Con-Test Analytical Laboratory in East Longmeadow, Massachusetts. The samples were analyzed by the Massachusetts Department of Environmental Protection (MADEP) method for volatile petroleum hydrocarbons (VPH). The analytical report is included in Appendix B. The analytical results were compared to the North Carolina Title 15A, NCAC, Subchapter 2L, Part .0202 (2L Standards). Based on the results, C5-C8 aliphatics and C9-C22 aromatics exceeded 2L Standards in MW-1. Monitoring well MW-2 did not indicate compounds above laboratory detection limit. Well construction details and groundwater elevation data for monitoring wells MW-1 and MW-2 are included as Table 1. Monitoring well analytical data is included as Table 2. As part of ATC’s quality assurance and quality control (QA and QC) measures, a data review of the laboratory report was conducted. During the review, it was found that the samples were received from the laboratory in acceptable condition and properly preserved. The samples were analyzed within correct holding times and reported within the lab report, and the chain of custody was properly TABLES TABLE 1 WELL CONSTRUCTION AND GROUNDWATER ELEVATION DATA J.C. WOODY STORE 295 ASHLEY AVENUE TIMBERLAKE, PERSON COUNTY, NORTH CAROLINA INCIDENT #6422 ATC PROJECT #Z045000076 Well ID Date Installed Well Casing depth (ft.) Screened Interval (ft.) Depth of Well (ft.) TOC Elev. (ft.) Date Measured Depth to Product Depth to Water Product Thickness Groundwater Elevation 11/22/2004 ND 1.85 ND NS 12/20/2014 ND 3.70 ND NS 3/3/2015 ND 3.17 ND NS 11/22/2004 ND 5.06 ND NS 12/20/2014 ND ~ 0.6 ND NS 3/3/2015 ND 6.28 ND NS Notes: 5. Corrected Groundwater Elevation = (Groundwater Elevation + (Product Thickness *0.76)) 6. ND = Not Detected 2. NS = Not Surveyed 3. TOC = Top of casing 4. NA = Not Applicable 1. NM = Not Measured NS MW-2 11/10/2004 5 5-20 20 NS MW-1 11/10/2004 5 5-20 20 Page 1 of 1 TABLE 2 GROUNDWATER ANALYTICAL DATA J.C. WOODY STORE 295 ASHLEY AVENUE TIMBERLAKE, PERSON COUNTY, NORTH CAROLINA INCIDENT #6422 ATC PROJECT #Z045000076 BenzeneTolueneEthylbenzeneTotal XylenesNaphthaleneMTBEIsopropyl Ether1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneLeadC5-C8 AliphaticsC9-18 AliphaticsC9-C22 Aromatics11/22/2004 88 56 <20 254 <20 <20 <20 56 30 <5 1,600 97 430 12/20/2014 <0.079 <0.090 <0.092 <0.18 <0.12 <0.090 <0.18 <0.18 <0.1 NA NA NA NA 3/3/2015 NA NA NA NA NA NA NA NA NA NA 1,100 <100 290 11/22/2004 <0.50 <0.50 <0.50 <1.5 <0.50 <0.50 <0.50 <0.50 <0.50 <5 <150 <100 <50 12/20/2014 <0.079 <0.090 <0.092 <0.18 <0.12 <0.090 <0.18 <0.18 <0.1 NA NA NA NA 3/3/2015 NA NA NA NA NA NA NA NA NA NA <100 <100 <100 1 600 600 500 6 20 70 400 400 15 420 4200 210 5,000 260,000 84,500 85,500 6,000 20,000 70,000 28,500 25,000 15,000 NE NE NE Notes: 1. "<" = Not detected at or above the laboratory detection limit or reporting limit 2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion (ppb) 4. GCL = Gross Contamination Level 5. MTBE = Methyl Tertiary Butyl Ether 6. J = Estimated value below method reporting limit 7. C9-C18 Aliphatics values are equal to C9-C12 aliphatics reported in the laboratory report 8. C9-C22 Aromatics are equal to C9-C10 aromatics reported in the laboratory analytical report 9. NA = Not Analyzed MADEP VPHMethod 6200B 2L GW Standard GCL 3. Concentrations highlighted and in bold print equal or exceed the January 1, 2010, NCDENR 15A 2L NCAC Groundwater Standard (2L Standard). Monitoring Well Date MW-1 MW-2 FIGURES 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 FIGURE 1 SITE TOPOGRAPHIC MAP PROJECT NO: Z045000076 REVIEWED BY: JC SCALE: 1:69 DATE: 1/15/15 J.C. WOODY – INCIDENT #6392 295 ASHLEY AVENUE TIMBERLAKE, NORTH CAROLINA Source: Person County, NC GIS, 2013 Timberlake Quadrangle N Site 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 FIGURE 2 SITE MAP PROJECT NO: Z045000076 REVIEWED BY: JC SCALE: 1:70 DATE: 1/15/15 J.C. WOODY – INCIDENT #6422 295 ASHLEY AVENUE TIMBERLAKE, NORTH CAROLINA Source: Person County, NC GIS N Site MW-1 MW-2 Monitoring Well 2725 E. Millbrook Road, Suite 121 Raleigh, NC 27604 (919) 871-0999 FIGURE 3 POTENTIAL RECEPTOR SURVEY MAP PROJECT NO: Z045000076 REVIEWED BY: JC SCALE: 1” = 275’DATE: 1/15/15 J.C. WOODY – INCIDENT #422 295 ASHLEY AVENUE TIMBERLAKE, NORTH CAROLINA Source: Person County NC GIS 500 Foot Radius 1,000 Foot Radius Well IdentificationWSW-3 N WSW-1 WSW-10 WSW-6 LEGEND: ACTIVE WATER SUPPLY WELL INACTIVE WATER SUPPLY WELL IRRIGATION/VEHICLE WASHING WELL UNKNOWN USAGE ABANDONED WATER SUPPLY WELL WSW-24 WSW- 16WSW-20 WSW-9 WSW-25 WSW-26 WSW-7 WSW-8 WSW-14 WSW-17 WSW-29 WSW-4 WSW-31 WSW-21 WSW-22 WSW-3 AW-2 AW-3 Site WSW-1A WSW-30 AW-1 WSW-5 WSW-12 WSW-11 WSW-19WSW-18 WSW-27 WSW-28 WSW-2 WSW-13 WSW-32 Note: Only water supply wells located within 1,000 feet of the site are shown on the figure. APPENDIX A FIELD NOTES APPENDIX B LABORATORY ANALYTICAL REPORT Page 1 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Table of Contents Sample Summary 3 Case Narrative 4 Sample Results 5 15C0206-01 5 15C0206-02 6 Sample Preparation Information 7 QC Data 8 Petroleum Hydrocarbons Analyses - VPH 8 B116453 8 Flag/Qualifier Summary 10 Certifications 11 Chain of Custody/Sample Receipt 12 Page 2 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 3 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 4 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 5 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 6 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 7 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 8 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 9 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 10 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 11 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 12 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 13 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 14 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents Page 15 of 15 15C0206_2 Contest_Final 03 11 15 1339 Table of Contents