RA-613_3831_CA_HRE_20210218_Determination for wsw-1 and 5

February 18, 2021

TO: Mark Petermann NC UST Section RE: Health Risk Evaluation
Incident # 3831
Mt. Harmony Baptist Church Well Sampling Results 1655 Mt. Harmony Church Road Rougemont, 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)
LA69363-5 Methyl Tert Butyl Ether 1.6 20
µg/L – Stands for micrograms of contaminant per liter of water and is 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.
David Lilley, Environmental Toxicologist
Division of Waste Management, NCDEQ

February 18, 2021
TO: Mark Petermann NC UST Section
RE: Health Risk Evaluation
Incident # 3831 Crystal Scott Well Sampling Results 1915 Mt. Harmony Church Road Rougemont, 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)
LA69363-7 Methyl Tert Butyl Ether 0.93 20
µg/L – Stands for micrograms of contaminant per liter of water and is 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.
David Lilley, Environmental Toxicologist Division of Waste Management, NCDEQ