WA-1096_13128_CA_HRE_20161007

PAT MCCRORY
Governor

DONALD R. VAN DER VAART
Secretary

MICHAEL SCOTT
Director

State of North Carolina | Environmental Quality | Waste Management
1646 Mail Service Center | 217 West Jones Street | Raleigh, NC 27699-1646
919 707 8200 Telephone

October 7, 2016

TO: Allison Ward
Washington Regional Office
NC UST Section

RE: Health Risk Evaluation
FTF Incident # 13128
Stokes Post Office Well Sampling Results
2817 NC Hwy 903
Stokes, NC

During this sampling event, seven 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
household uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing. The chart
below compares the detected contaminant concentrations with the applicable standard:

Allison Ward
October 7, 2016
Page 2 of 2

Sample ID
Contaminant

Concentration (µg/l)*

MCL (µg/l)

2L (µg/l)
16-32340 Acetone 28.9 6,000
Benzene 65.8 5
Bromodichloromethane 8.27 80**
Chloroform 26.4 80**
Chloromethane 0.76 3
Dibromochloromethane 2.05 80**
Toluene 0.88 1,000
Shaded boxes indicate a standard has been exceeded.

* The abbreviation µg/l stands for micrograms of contaminant per liter of water and is roughly equivalent to
parts per billion.

** As total trihalomethanes.

RECOMMENDATION: The benzene concentration exceeds the applicable standard and the level
that would be considered safe for other household uses. Therefore, this water is not recommended for any
residential use at this time.

David Lilley, Environmental Toxicologist
Division of Waste Management, NCDEQ
PAT MCCRORY
Governor DONALD R. VAN DER VAART
Secretary MICHAEL SCOTT
Acting Director
State of North Carolina | Environmental Quality | Waste Management
Washington Regional Office | 943 Washington Square Mall | Washington, NC 27889 | [phone]
October 7, 2016
United States Post Office
ATTN: Mrs. Linda Harrell 2817 NC Highway 903 N Stokes, North Carolina 27884
Re: Health Risk Evaluation of Water Supply Tracking ID: 13128 Dear To Whom it May Concern: Please find attached the Sample Analytical Results for a water sample collected from your facility, identified as TAP-2, located at 2817 NC Hwy 903, Stokes, Pitt County, on September 14, 2016. 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 constituents (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 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 Dave Lilley at [phone] or contact me at the address or telephone number listed below for the Washington Regional Office. Sincerely, Allison Ward Environmental Senior Technician Washington Regional Office UST Section, Division of Waste Management, NCDEQ
Attachments: Stokes Post Office TAP-2 Sample Analytical Results Health Risk Evaluation
cc: Mr. Edwin Congleton, PO Box 1, Stokes NC 27884
Dr. John H. Morrow, Director, Pitt County Health Department D. Scott Elliott, County Manager, Pitt County
NC DEQ, Division of Environmental Health, Public Water Supply Section, Washington Regional Office Washington Regional Office | 943 Washington Square Mall | Washington, NC 27889 | [phone]
PAT MCCRORY
Governor DONALD R. VAN DER VAART
Secretary MICHAEL SCOTT
Director
State of North Carolina | Environmental Quality | Waste Management
Washington Regional Office | 943 Washington Square Mall | Washington, NC 27889 | [phone]
October 6, 2016 MEMORANDUM TO: Dyk Luben, Regional Office Supervisor Public Water Section Washington Regional Office

FROM: Allison Ward, Environmental Senior Technician UST Section Washington Regional Office
RE: Petroleum Contamination Investigation of Public Water Line
Exceeding the 15A NCAC 2L Standards
Stokes & Congleton, Inc. 2817 NC Highway 903, Stokes, Pitt County UST Incident #13128

I am submitting to you the laboratory results for water samples collected September 14, 2016 at the neighboring property - the Stokes US Post Office. The water samples were collected to test for petroleum contamination that may enter the public water line, because of its proximity to high contaminant concentrations in the shallow groundwater table. The samples were
collected from inside spigots after letting the water facet run for about ten minutes. All samples
were analyzed for volatile organic constituents. Benzene, a petroleum constituent, was detected in the sample at a concentration above the health based value. Please see the attached Health Risk Evaluation.
If you have any questions or need additional information, please contact Allison
Ward or Sylvia Newsom-Hunneke at [phone]. Attachment(s): Stokes Post Office (TAP-2) sample analytical results Health Risk Evaluation