HomeMy WebLinkAboutRA-1913_11680_CA_HRE_20200317_Determinations wsw 8, 10, 12
March 17, 2020
TO: Mark Petermann
NC UST Section
RE: Health Risk Evaluation
Tracking ID: 11680
Harold Duncan Well Sampling Results
8700 US Highway 15 North
Bullock, 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)
0020258-18 Isopropyl Ether 11 70
Methyl-tert-Butyl Ether 1.2 20
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
March 17, 2020
TO: Mark Petermann
NC UST Section
RE: Health Risk Evaluation
Tracking ID: 11680
Brian Hayes Well Sampling Results
8685 US Highway 15 North
Bullock, 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)
0020258-19 Isopropyl Ether 2.4 70
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 17, 2020
TO: Mark Petermann
NC UST Section
RE: Health Risk Evaluation
Tracking ID: 11680
Martin & Nancy Lee Well Sampling Results
8682 US Highway 15 North
Bullock, NC
During this sampling event, three 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)
0020258-20 Isopropyl Ether 80 70
1,2-Dichloroethane 1.6 5
Methyl-tert-Butyl Ether 18 20
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 isopropyl ether 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