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Home My WebLink AboutWA-1096_13128_CA_HRE_20180921 September 21, 2018 TO: Allison Ward Washington Regional Office NC UST Section RE: Health Risk Evaluation Tracking Number: 13128 TAP-1 Well Sampling Results 2817 NC Hwy 903 Stokes, NC During this sampling event, four contaminants were detected in the well water. The standards used to determine if the water is suitable for drinking and cooking are the United States Environmental Protection Agency’s Maximum Contaminant Levels (MCLs) or, if no MCLs exist, North Carolina Groundwater Standards (2L). If any contaminant concentrations exceed applicable standards for using the water for drinking and cooking, those contaminant concentrations are further analyzed to determine if the water is suitable for other household uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing. The chart below compares the detected contaminant concentrations with the applicable standards: Sample ID Contaminant Concentration (µg/l)* MCL (µg/l) 2L (µg/l) 18-35426 Bromodichloromethane 5.04 80** Bromoform 23.2 80** Chloroform 2.14 80** Dibromochloromethane 9.61 80** * The abbreviation µg/l stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion. ** As total trihalomethanes. RECOMMENDATION: None of the contaminants detected exceeded the applicable water standards. Therefore, no restrictions on the use of this water are recommended at this time. David Lilley, Environmental Toxicologist Division of Waste Management, NCDEQ September 21, 2018 TO: Allison Ward Washington Regional Office NC UST Section RE: Health Risk Evaluation Tracking Number: 13128 TAP-2 Well Sampling Results 2817 NC Hwy 903 Stokes, NC During this sampling event, five contaminants were detected in the well water. The standards used to determine if the water is suitable for drinking and cooking are the United States Environmental Protection Agency’s Maximum Contaminant Levels (MCLs) or, if no MCLs exist, North Carolina Groundwater Standards (2L). If contaminant concentrations exceed the applicable standards for using the water for drinking and cooking, the contaminant concentrations are further analyzed to determine if the water is suitable for other non- ingestive uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing. The chart below compares the detected contaminant concentrations with the applicable standards: Sample ID Contaminant Concentration (µg/l)* MCL (µg/l) 2L (µg/l) 18-35427 Bromodichloromethane 5.08 80** Bromoform 23.9 80** Chloroform 2.14 80** Dibromochloromethane 9.93 80** Benzene 21.2 5 Shaded boxes indicate a standard has been exceeded. * The abbreviation µg/l stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion. ** As total trihalomethanes. RECOMMENDATION: The benzene concentration in this well exceeds the applicable standard. Therefore, this water is not recommended for drinking or cooking at this time. No restrictions are recommended for using the water for other non-ingestive uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing. David Lilley, Environmental Toxicologist Division of Waste Management, NCDEQ September 20, 2018 MEMORANDUM TO: Dave Lilley, Environmental Toxicologist Division of Waste Management 1646 Mail Service Center Raleigh, NC 27699 FROM: Allison Ward Washington Regional Office UST Section RE: Request for Health Risk Evaluation of Public Water Supply Line Tracking ID: Stokes & Conleton, UST Incident 13128 Enclosed please find the analytical results for two water sample/samples collected on May 3, 2017 from the on site location (TAP-1) and Stokes Post Office (TAP-2) public water supply lines, located at 2817 NC Hwy 903, Stokes, Pitt County. Please perform a health risk evaluation and send the evaluation with your recommendation and a copy of this memo to me. I will then forward the health risk evaluation and recommendation to any water supply line users. If you have questions or need additional information, please contact me at the address or telephone number below. Thank you for your assistance Attachment(s): TAP-1 and TAP-2 sample analytical results September 24, 2018 United States Post Office ATTN: Mrs. Linda Harrell 2817 NC Highway 903 N Stokes, North Carolina 27884 Re: Health Risk Evaluation of Water Supply Tracking ID: 13128 Dear Mrs. Harrell: Please find attached the Sample Analytical Results for a water sample collected from your facility, identified as TAP-2, located at 2817 NC Hwy 903, Stokes, Pitt County, on August 23, 2018. The sample was collected and analyzed as part of the investigation of a petroleum release in the vicinity. The water sample was analyzed for specific target constituents (contaminants), which are listed on the attached Sample Analytical Results. Contaminants were detected in the water sample, as shown on the attached Sample Analytical Results. Because contaminants were detected in the water sample, a Health Risk Evaluation of the water supply was performed by an environmental toxicologist in the Division of Waste Management. The Health Risk Evaluation, which is attached also, compares the detected concentration of contaminants to acceptable concentrations and provides a recommendation for safe use of the water. If you have any questions, please contact Dave Lilley at (919) 707-8241 or contact me at the address or telephone number listed below for the Washington Regional Office. Sincerely, Allison Ward Hydrogeologist Washington Regional Office UST Section, Division of Waste Management, NCDEQ Attachments: On site (TAP-1) and Stokes Post Office (TAP-2) Sample Analytical Results Health Risk Evaluation cc: Mr. Edwin Congleton, PO Box 1, Stokes NC 27884 Dr. John H. Morrow, Director, Pitt County Health Department D. Scott Elliott, County Manager, Pitt County NC DEQ, Division of Environmental Health, Public Water Supply Section, Washington Regional Office WaRO September 24, 2018 MEMORANDUM TO: Dyk Luben, Regional Office Supervisor Public Water Section Washington Regional Office FROM: Allison Ward, Hydrogeologist UST Section Washington Regional Office RE: Petroleum Contamination Investigation of Public Water Line Exceeding the 15A NCAC 2L Standards Stokes & Congleton, Inc. 2817 NC Highway 903, Stokes, Pitt County UST Incident #13128 I am submitting to you the laboratory results for water samples collected August 23, 2018 on site and at the neighboring property - the Stokes US Post Office. The water samples were collected to test for petroleum contamination that may enter the public water line, because of its proximity to high contaminant concentrations in the shallow groundwater table. The samples were collected from inside spigots after letting the water facet run for about ten minutes. All samples were analyzed for volatile organic constituents. Benzene, a petroleum constituent, was detected in the sample at a concentration above the health based value. Please see the attached Health Risk Evaluation. If you have any questions or need additional information, please contact Allison Ward or Sylvia Newsom-Hunneke at (252) 946-6481. Attachment(s): On site (TAP-1) and Stokes Post Office (TAP-2) sample analytical results Health Risk Evaluation