1812_Duke_Marshall_LCSRevisions_DIN28075_20170629

ROY COOPER
Governor

MICHAEL S. REGAN
Secretary
MICHAEL SCOTT
Director
State of North Carolina | Environmental Quality | Waste Management
Asheville Regional Office | 2090 US Highway 70 | Swannanoa, North Carolina 28778
828 296 4500 T

June 29, 2017

EMAIL DELIVERY ONLY

Ms. Tyler Hardin, Environmental Services
Duke Energy Corporation
526 South Church Street
Mail Code EC13K
Charlotte, North Carolina 28202

Subject: Leachate System Modification Request
Permit No. 1812-INDUS-2008, Duke Energy Marshall Steam Station
Catawba County, DIN 28075

Dear Ms. Hardin:
On June 28, 2017, the Division of Waste Management, Solid Waste Section (Section) received
Duke Energy’s request entitled;
Industrial Landfill No. 1 Cells 3 and 4 Leachate System Modifications Request, Permit No.:
1812-INDUS, Marshall Steam Station, Catawba County, Terrell, North Carolina 28682.
Prepared by S&ME. Prepared for Duke Energy. DIN 28070. June 2017.
The request concerns modification to the leachate removal system for Cells 3 and 4 of the
industrial landfill, Permit No. 1812-INDUS-2008. The submitted drawings include temporary
discharge piping to the currently permitted ash basin and future piping to a yet to be designed
retention basin. The Section has reviewed the proposed revisions and sees nothing in the
drawings or the concept that it would not approve. However, the Section cannot approve the
revisions at this time because none of the proposed revisions are stamped by a licensed
professional engineer (PE). The Section therefore requests Duke Energy resubmit the
information and supporting calculations with the proper PE review, for approval.
Note, as Duke Energy moves toward the storage of leachate for processing in permitted
wastewater treatment plants and away from permitted ash basin treatment, as recently presented
at Allen and Marshall, the Section must be consulted in the design of all proposed leachate
storage/retention basins (basins that store leachate) with regards to; siting, construction, storage
capacity, and proper permitting.

Duke Energy, Marshall Steam Station
June 29, 2017
DIN 28075
Page 2 of 2
Documents regarding this matter can be accessed at;
http://edocs.deq.nc.gov/WasteManagement/0/fol/1045/Row1.aspx. Should you have any
questions contact me at [phone] [e-mail].

Sincerely,

Larry Frost, Engineering Project Manager
Permitting Branch, Solid Waste Section
Division of Waste Management, NCDEQ

ec: Ed Mussler – SWS/RCO
Shawn Mckee – SWS/RCO
Shannon Aufman – SWS/RCO