Revised Roxboro Coal Pile Assessment Plan Comments Ltr

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Paul Draovitch
Senior Vice President
Environmental, Health & Safety
Duke Energy .
526 South Church Street
Mail Code EC3XP
Charlotte, North Carolina 28202
NORTH CAROLINA
Envlm mentd QuaW
June 14, 2019
Subject: Revised Roxboro Steam Electric Plant Coal Pile Groundwater Assessment Plan
Comments
Dear Mr. Draovitch:
This letter supersedes the comment letter the North Carolina Department of Environmental Quality
Division of Water Resources (Division) sent to you on May 21, 2019. The previous letter indicated
that the results of this assessment should be incorporated into the facility's Corrective Action Plan
(CAP) that includes the impoundments; however, it was agreed that this area will be included in a
separate Comprehensive Site Assessment (CSA).
On May 7, 2019, the Division received the proposed Groundwater Assessment Plan for the Coal
Pile at the Roxboro Steam Electric Plant. The Division has reviewed and hereby approves the
proposed assessment activities under the condition that the following item is addressed as part of
the plan implementation and the results reported in the CSA for the subject area if the area is
confirmed to be positioned in a separate flow regime than ash basin area. Otherwise, the results
should be incorporated into the facility's CAP that includes the impoundments.
• If the physical well locations of the proposed monitoring wells deviate by more than one
hundred (100) feet from the original proposed locations, please contact the Raleigh
Regional Office prior to boring/well installation.
The results should also be incorporated into the CAP's geochemical and groundwater fate and
transport models if the subject area is found to be coincident with impoundments. If the results of
the modeling show current or future impacts to groundwater and/or surface water from this area,
then appropriate remedial strategies shall be proposed in the CAP.
North Carolina Department of Environmental Quality I Division of Water Resources
_ •/ 512 North Salisbury Street 11636 Mail Service Center I Raleigh, North Carolina 27699-1636
919.707.9000

If you have any questions, please contact Eric Rice (Raleigh Regional Office) at [phone]
or Steve Lanter (Central Office) at [phone].
Sincerel ,
Jon Ri
2 aard, Chief
Animal Feeding Operations and Groundwater Section
cc: RRO WQROS Regional Office
WQROS Central File Copy