WS-6694_30208_CA_HRE_20210210_HRE Town of Liberty

February 10, 2021 TO: Herb Berger NC UST Section

RE: Health Risk Evaluation Incident # 30208 Well Sampling Results 218 West Raleigh Avenue
Liberty, 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)
1010253-09 Chloromethane 3.5 3
Shaded box indicates a standard has been exceeded. µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion.
RECOMMENDATION: The chloromethane 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

February 10, 2021 TO: Herb Berger NC UST Section
RE: Health Risk Evaluation Incident # 30208 Well Sampling Results 234 North Greensboro Street Liberty, NC
During this sampling event, two 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)
1010253-10 Chloromethane 7.6 3
Trichloroethylene 1.3 5
Shaded boxes indicate a standard has been exceeded. µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion.
RECOMMENDATION: The chloromethane 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