WS-3748_12330_CA_HRE_20140930

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North Carolina Department of Environment and Natural Resources
Pat McCrory Governor John E. Skvarla, III Secretary September 30, 2014 TO: Herb Berger NC UST Section

RE: Health Risk Evaluation Incident # 12330 Stokes County Board of Education Well Sampling Results 7165 Highway 89 West
Westfield, NC
During this sampling event, three 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 (ug/l)* MCL (ug/l) 2L (ug/l)
795332 Bromodichloromethane 1.29 80**
Chloroform 2.30 80**
Dibromochloromethane 1.05 80**
* The abbreviation ug/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, NCDENR