WS-8622_37884_CA_WSW_20230111_SW4

January 11, 2023

Charles and Michelle Pendleton
809 NC Highway 62W
Greensboro, NC 27406

Re: Health Risk Evaluation of Water Supply
Tracking ID: Hilltop Store-B, Incident #37884

Dear Mr. and Ms. Pendleton:

Please find attached the Sample Analytical Results for water supply well sample collected from your well,
identified as SW-4, located at 809 NC Highway 62 West, Greensboro, Guilford County, on December 8,
2022. The sample was collected and analyzed as part of the investigation of a petroleum release in the
vicinity. The water sample was analyzed for specific target analytes (contaminants), which are listed on the
attached Sample Analytical Results. Contaminants were detected in the water sample, as shown on the
attached Sample Analytical Results.

Because contaminants were detected in the water sample, a Health Risk Evaluation of the water supply was
performed by an environmental toxicologist in the Division of Waste Management. The Health Risk
Evaluation, which is also attached, 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 Dave Lilley at [phone] or contact Ashley Dinkins at (336)
641-5557 or at the Guilford County Department of Health and Human Services office located at 400 W.
Market Street, Suite 300, Greensboro, NC 27401.

Sincerely,

James W. Brown
Regional Supervisor
Winston-Salem Regional Office
UST Section, Division of Waste Management, NCDEQ

Attachment: SW-4 Sample Analytical Results
Health Risk Evaluation

cc: Iulia Vann, Guilford County Department of Health and Human Services
Michael Halford, Guilford County

January 10, 2023
TO: Ashley Dinkins
Guilford County Department of Health and Human Services for
Winston-Salem Regional Office
NC UST Section
RE: Health Risk Evaluation
Incident # 37884
Charles Pendleton Well Sampling Results
809 NC Highway 62 West
Greensboro, 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 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)
95182 Chloroform 0.466 80*
Methyl tert-butyl ether 0.680 20
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 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