WS-2669_6146_CA_HRE_20190315_Smith Property

March 15, 2019

TO: Herb Berger
NC UST Section

RE: Health Risk Evaluation
Tracking Number: 6146
Larry Smith Well Sampling Results
Glendale Springs, 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)
19C0006-10 Diisopropyl Ether 0.30 70
* The abbreviation 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