WS-3891_12913_CA_HRE_20230306

March 6, 2023

TO: Mindy Lepard Winston-Salem Regional Office NC UST Section
RE: Health Risk Evaluation
Incident # 12903 Neel Well Sampling Results (INF) 2765 Union Ridge Road Burlington, NC

During this sampling event, four 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 (µg/L) MCL (µg/L) 2L (µg/L)
98152 Acetone 10.1 6,000
Di-Isopropyl Ether 17.2 70
1,2-Dichloroethane 1.49 5
Methyl tert-butyl ether 16.4 20
µg/L – Micrograms of contaminant per liter of water, roughly equivalent to parts per billion. RECOMMENDATION: None of the contaminants detected exceed the applicable water standards. Therefore, no restrictions on the use of this water are recommended at this time.

Although none of the contaminant levels exceed the applicable regulatory values, 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

March 6, 2023 TO: Mindy Lepard Winston-Salem Regional Office
NC UST Section RE: Health Risk Evaluation Incident # 12903 Neel Well Sampling Results (EFF)
2765 Union Ridge Road Burlington, 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)
98153 Acetone 3.23 6,000
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

March 6, 2023
TO: Mindy Lepard
Winston-Salem Regional Office NC UST Section RE: Health Risk Evaluation
Incident # 12903 Lassiter Well Sampling Results 2773 Union Ridge Road Burlington, 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 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 (µg/L) MCL (µg/L) 2L (µg/L)
98154 Acetone 2.28 6,000
trans-1,2-Dichloroethene 0.494 100
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion.
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, NCDEQ