RA-1042_6805_CA_HRE_20200227_Determinations wsw-1, 2, and 3

February 27, 2020

TO: Mark Petermann NC UST Section RE: Health Risk Evaluation
Incident # 6805
Charles Jackson and Linda Edwards Well Sampling Results 6501 Efland-Cedar Grove Road Cedar Grove, 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)
0020188-16 Chloroform 4.9 80*
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion. * As total trihalomethanes. 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 27, 2020 TO: Mark Petermann
NC UST Section RE: Health Risk Evaluation Incident # 6805 Lauren and Lance Robinson Well Sampling Results
6402 Efland-Cedar Grove Road Cedar Grove, 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)
0020188-15 Chloroform 1.2 80*
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion.
* As total trihalomethanes. 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 27, 2020 TO: Mark Petermann
NC UST Section RE: Health Risk Evaluation Incident # 6805 Miriam Wells, c/o David Wells Well Sampling Results
1100 McDade Store Road Cedar Grove, 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)
0020188-14 Chloroform 0.92 80*
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion.
* As total trihalomethanes. 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