NC0032719_Email (Request for Review)_20190325

Strickland, Bev
From: Tankard, Robert
Sent: Monday, March 25, 2019 11:03 AM
To: Sipe, Randy; May, David
Subject: VALHALLA INFORMATIONAL PAPER
Attachments: Information Paper FOR VALHALLA WTP.doc
RANDY AND DAVID, please review and comment. I need to send to Secretary's office today.
Thanks!
Robert
Robert Tankard
Assistant Regional Supervisor
Division of Water Resources
Water Quality Regional Operations Section
943 Washington Square Mall
Washington, NC 27889
252-948-3921 office
252-975-3716 fax
Robert.tankarda-ncdenr.gov
Nothing Compares.
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

March 28, 2019
VALHALLA WATER TREATMENT PLANT
CHOWAN COUNTY
Subj: Information Paper
1. Purpose: To describe the issues with the Valhalla Water Treatment Plant.
2. Agenda
3. Key Points
* The water treatment plant consists of a greensand and ion exchange water treatment units
designed to produce 2.3 MGD of potable water with the discharge of filter backwash and softener
recharge wastewaters. The facility adds calcium thiosulfate for dichlorination to the waste stream
to reduce residual chlorine. The wastewater then dumps into a borrow pit where the water
infiltrates in the ground. There is no discharge. The facility has violated groundwater standards
for chlorides, iron and manganese at the compliance boundary and the contamination has been
documented off site.
* The County entered into a Special Order by Consent on November 30, 2016. With that
the County was going to do an alternative analysis to see what their options were for
disposal of the wastewater. They have completed the analysis and now are looking at
modelling for their wastewater discharge at a new location.
* Under the SOC, the County paid an upfront penalty of $5000 dollars to settle all
violations that have incurred previously with the operation of the permit.
* The SOC required the County to categorize the plume of the groundwater contamination
of chlorides, iron and manganese. The plume encompasses approximately 55 acres.
* The SOC also required the County to prepare a Corrective Action Plan for the
remediation of the groundwater contamination. The County is presently working on the
plan.
* The SOC requires the County to achieve compliance before May 1, 2020. (This date is
not for the groundwater contamination.)
Prepared by: Robert Tankard
DWR/WQROS, Ph 4 - 252-948-3921