WS-3748_12330_CA_HRE_20120625_Francisco Elementary School

1646 Mail Service Center, Raleigh, North Carolina 27699-1646 Phone: [phone] \ Internet: http://portal.ncdenr.org/web/wm/
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June 25, 2012 TO: Herb Berger NC UST Section
FROM: David Lilley Environmental Toxicologist
NC Division of Waste Management RE: Health Risk Evaluation Incident #12330 Kodell’s Grocery
Stokes County Board of Education Well Sampling Results 7165 Highway 89 West Westfield, NC During this sampling event, six 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:

North Carolina Department of Environment and Natural Resources Division of Waste Management
Beverly Eaves Perdue Dexter R. Matthews Governor Director
Dee Freeman Secretary
1646 Mail Service Center, Raleigh, North Carolina 27699-1646 Phone: [phone] \ Internet: http://portal.ncdenr.org/web/wm/
An Equal Opportunity \ Affirmative Action Employer

Sample ID Contaminant Concentration (ug/l)* MCL (ug/l) 2L (ug/l)
2060244-02 Acetone 2.9 6,000
Bromodichloromethane 6.2 80**
Bromoform 3.0 80**
Chloroform 9.6 80**
Dibromochloromethane 4.9 80**
Total Xylenes 0.53 10,000
* 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.