NC0032719_Correspondence_20160111

PAT MCCRORY
DONALD R. VAN DER VAART
S. JAY ZIMMERMAN
January 11, 2016
Mr. Kevin Howard, County Manager
County of Chowan
PO Box 1030
Edenton, North Carolina 27932
RE: Initial Site Assessment Report Review
Vahalla Water Treatment Plant
NPDES Permit No. NCO032719
Chowan County, North Carolina
Dear Mr. Howard:
On December 22, 2015, the Washington Regional Office received a report for the above
referenced facility that presented the results of the Initial Site Assessment performed in response
to the Notice Of Violation (NOV) issued by the Division of Water Resources — Water Quality
Regional Operations Section on October 6, 2015, for exceedance of the North Carolina
Groundwater Quality Standards (15A NCAC 2L). Based on our review, this office concurs with
the conclusions and recommendations in the report and requests that Chowan County proceed with
the performance of a Comprehensive Site Assessment (CSA), as required by 15A NCAC 2L
.0106(g). The CSA should include, but is not limited to the following:
The source and cause of contamination;
2. Any imminent hazards to public health and safety and actions taken to mitigate them
in accordance with 15A NCAC 2L .0106(f);
3. All receptors and significant exposure pathways;
4. The horizontal and vertical extent of soil and groundwater contamination and all
significant factors affecting contaminant transport; and
5. Geological and hydrogeological features influencing the movement, chemical, and
physical character of the contaminants.
State of North Carolina I Environmental Quality I Water Resources —Water Quality Regional Operations —Washington Regional Office
943 Washington Square Mail, Washington, NC 27889
252-946-6481

Mr. Kevin Howard
January 11, 2016
Page 2 of 2
The CSA must be conducted under the supervision of a Professional Engineer (P.E.) or
Licensed Geologist (L.G.). The subsequent report must be signed and sealed by a P.E. or L.G.
For information on available consultants and engineers, you may contact the Consulting Engineers
Council of North Carolina at [phone], or the North Carolina Board for Licensing of
Geologist at [phone], or the North Carolina Petroleum Marketers Association at (919) 782-
4411.
The items listed above must be addressed in a CSA report within ninety (90) days of
issuance of this letter. As noted in the NOV, failure to submit the CSA report by the required
deadline may result in the recommendation of enforcement action.
If you have any questions regarding the contents of this letter or need additional
information, you may contact Robert Tankard at [phone] or Randy Sipe at [phone].
Sincerely,
L
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Robert Tankard, Assistant Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
cc: Chowan County Health Department
Katie T. Hackney, P.G. — Groundwater Management Associates, Inc., 4300
Sapphire Court, Suite 100, Greenville, NC 27834
Water Quality Regional Operations Section Central Files
WaRO
RT/drs