RA-3534_22296_CA_HRE_20230110_Determinations WSW 1A, Metcalf, Thomas

January 10, 2023
TO: Mark Petermann
NC UST Section RE: Health Risk Evaluation Incident # 22296
Bradley Property Well Sampling Results 9961 NC 87 North Pittsboro, NC
During this sampling event, seven 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)
22L0269-05 Acetone 28 6,000
Bromodichloromethane 3.7 80*
Bromoform 6.7 80*
Chlorodibromomethane 4.8 80*
Chloroform 7.6 80*
Toluene 33 1,000
2-Butanone 37 4,000
µg/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 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 levels of bromodichloromethane and bromoform in this well exceed the values recommended by the North Carolina Department of Health and Human Services (DHHS) of 0.6 µg/L and 4 µg/L, respectively. 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

January 10, 2023
TO: Mark Petermann NC UST Section
RE: Health Risk Evaluation Incident # 22296 Metcalf Property Well Sampling Results 9998 NC 87 North Pittsboro, 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)
22L0269-07 Acetone 5.6 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

January 10, 2023
TO: Mark Petermann NC UST Section
RE: Health Risk Evaluation Incident # 22296 Thomas Property Well Sampling Results 9925 NC 87 North
Pittsboro, 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)
22L0269-06 Acetone 6.2 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