RA-493_1943_CA_HRE_20210216_Determination WSW 5A

February 16, 2021 TO: Mark Petermann NC UST Section

RE: Health Risk Evaluation Incident # 1943 Willie Felts Well Sampling Results 2061 US Highway 1
Wise, NC
During this sampling event, one contaminant was 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 the contaminant concentration exceeds the applicable standard for using the water for drinking and cooking, the contaminant concentration is 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 concentration with the applicable standard:
Sample ID Contaminant Concentration (µg/L) MCL (µg/L) 2L (µg/L)
LA69227-8 1,2-Dichloroethane 1.0 5
µg/L – Micrograms of contaminant per liter of water, roughly equivalent to parts per billion. RECOMMENDATION: The detected contaminant did not exceed the applicable water standard.
Therefore, no restrictions on the use of this water are recommended at this time.
Although the contaminant level did not exceed the applicable regulatory value, the level of 1,2-dichloroethane in this well exceeds 0.5 µg/L, the value recommended by the North Carolina Department of Health and Human Services (DHHS). The well user may want to contact the Private Well and Health program at (919) 707- 5900
for more information.
David Lilley, Environmental Toxicologist Division of Waste Management, NCDEQ