MO-6015_23108_G_WSW_20230315_PAYNEHRE

March 15, 2023
Janice Payne P.O. Box 417 Alexis, North Carolina 28006
Re: Health Risk Evaluation of Water Supply Tracking ID: Inc. No. 23108 Dear Ms. Payne: Please find attached the Sample Analytical Results for the water samples collected from your well, identified as WS-6 (Before) and WS-6 (after), located at 120 Alexis-Lucia Road, Alexis, Gaston County, on February 21, 2023. The samples were collected and analyzed as part of the investigation of a petroleum release in the vicinity. The water samples were analyzed for specific target analytes (contaminants), which are listed on the attached Sample Analytical Results. Contaminants were detected
in the water samples, as shown on the attached Sample Analytical Results. Because contaminants were detected in the water sample, a Health Risk Evaluation of each water
supply sample was performed by an environmental toxicologist in the Division of Waste Management. The Health Risk Evaluation, which is attached also, compares the detected concentration of contaminants to acceptable concentrations and provides a recommendation for safe use of the water.
If you have any questions, please contact David Lilley at [phone], or contact me at [phone]. Sincerely, Brad C. Newton, P.G. Hydrogeologist
Mooresville Regional Office UST Section, Division of Waste Management, NCDEQ
Attachments: Payne Sample Analytical Results Health Risk Evaluation
cc: Gaston County Health Department Gaston County Manager

March 15, 2023
TO: Brad Newton Mooresville Regional Office NC UST Section
RE: Health Risk Evaluation Incident # 23108 Payne Well Sampling Results (before) 120 Alexis-Lucia Road
Alexis, 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)
YB09078-003 Methyl tertiary butyl ether 2.5 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
March 15, 2023
TO: Brad Newton Mooresville Regional Office NC UST Section
RE: Health Risk Evaluation Incident # 23108 Payne Well Sampling Results (after) 120 Alexis-Lucia Road
Alexis, 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)
YB09078-004 Methyl tertiary butyl ether 2.7 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