NCC190890_ESC Approval Submitted_20190708

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
Energy,Mineral S. DANIEL SMITH
and Land Resources Interim Director
ENVIRONMENTAL QUALITY
June 25, 2019
LETTER OF APPROVAL WITH MODIFICATIONS
Duke Energy Carolinas, LLC
Attention: Christopher Varner, Senior Project Manager
Post Office Box 1244
Charlotte,North Carolina 28201
RE: Project Name: Grading and Erosion &Sediment Control Plan For Final Closure of Former Ash Storage
Areas—Additional Area
Acres Approved: 3.5
Project ID: GASTO-2019-023
County: Gaston, City: Mount Holly
Address: 175 Steam Plant Road
River Basin: Catawba
Stream Classification: WS-IV, B: CA, Other
Submitted By: Duke Energy Carolinas, LLC
Date Received by LQS: June 11, 2019
Plan Type: New
Dear Mr. Varner:
This office has reviewed the subject erosion and sedimentation control plan. We find the plan to be acceptable
with modifications and hereby issue this letter of Approval with Modifications. The Modifications Required for
Approval are listed on the attached page. This plan approval shall expire three (3) years following the date of
approval, if no land-disturbing activity has been undertaken, as is required by Title 15A NCAC 4B .0129.
As of April 1, 2019, all new construction activities are required to complete and submit an electronic Notice of
Intent (NOI) form requesting a Certificate of Coverage (COC) under the NCGO10000 Construction Stormwater
General Permit. This form MUST be submitted prior to the commencement of any land disturbing activity on
the above named project. The NOI form may be accessed at deq.nc.gov/NCGO1. Please direct questions about
the NOI form to Annette Lucas at [e-mail] or Paul Clark at [e-mail]. After
you submit a complete and correct NOI Form, a COC will be emailed to you within three business days. A
$100 fee will be charged annually. This fee is to be sent to the DEMLR Stonmwater Central Office staff in
Raleigh.
Title 15A NCAC 4B .0118(a) and the NCGO1 permit require that the following documentation be kept on file at
the job site:
1. The approved E&SC plan as well as any approved deviation.
State of North Carolina 1 Emironmcnial Quality 1 Energy,Mineral and land Resources
Mooresville Regional Office 1 610 Fast Center Ave Sic 301 I Mooresville,NC 28115
704 663 1699 T

Letter of Approval with Modifications
Duke Energy Carolinas, LLC
June 25, 2019
Page 2 of 3
2. The NCGO1 permit and the COC, once it is received.
3. Records of inspections made during the previous 30 days.
Also, this letter gives the notice required by G.S. 113A-61.1(a) of our right of periodic inspection to insure
compliance with the approved plan.
North Carolina's Sedimentation Pollution Control Act is performance-oriented, requiring protection of existing
natural resources and adjoining properties. If, following the commencement of this project, the erosion and
sedimentation control plan is inadequate to meet the requirements of the Sedimentation Pollution Control Act of
1973 (North Carolina General Statute 113A-51 through 66), this office may require revisions to the plan and
implementation of the revisions to insure compliance with the Act.
Acceptance and approval of this plan is conditioned upon your compliance with Federal and State water quality
laws, regulations, and rules. In addition, local city or county ordinances or rules may also apply to this land-
disturbing activity. This approval does not supersede any other permit or approval.
Please note that this approval is based in part on the accuracy of the information provided in the Financial
Responsibility Form, which you provided. You are requested to file an amended form if there is any change in
the information included on the form. In addition, it would be helpful if you notify this office of the proposed
starting date for this project. Please notify us if you plan to have a preconstruction conference.
Your cooperation is appreciated.
Sincerely,
am�i , PE, CPESC
Assistant Regional Engineer
Land Quality Section
Enclosures: Certificate of Approval
Modifications Required for Approval
NCGO1 Fact Sheet
c via E-mail: Chad Brown, PE, Wood Environment& Infrastructure Solutions, Incorporated
c: Inspection Department

Letter of Approval with Modifications
Duke Energy Carolinas, LLC
June 25, 2019
Page 3 of 3
MODIFICATIONS REQUIRED FOR APPROVAL
Project Name: Grading and Erosion& Sediment Control Plan For Final Closure of Former Ash
Storage Areas—Additional Area
Project ID: GASTO-2019-023
County: Gaston
Modifications Pursuant to anPlicable North Carolina General Statutes and/or Regulations:
1. Additional measures may be required - The applicant is responsible for the control of
sediment on-site. If the approved erosion and sedimentation control measures prove
insufficient, the applicant must take those additional steps necessary to stop sediment from
leaving this site. [15A NCAC 4B .0115]
Additional Comments:
1. Approval of this erosion and sediment control plan does not supersede any requirements or
provisions of North Carolina Senate Bill 729, "The Coal Ash Management Act", the Dam
Safety Act of 1967, as amended, or any other applicable regulation.
2. The NPDES General Construction Stormwater Permit does not supersede any existing or
potential wastewater and/or industrial stormwater permit requirements, or any other
applicable regulation.

CERTIFICATE OF PLAN APPROVAL
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The posting of this certificate certifies that an erosion and sedimentation control plan
has been approved for this project by the North Carolina Department of Environment
and Natural Resources in accordance with North Carolina General Statute 113A - 57 (4) and
113A - 54 (d) (4) and North Carolina Administrative Code, Title 15A, Chapter 4B.0107 (c).
This certificate must be posted at the primary entrance of the job site before construction
begins and until establishment of permanent groundcover as required by North Carolina
Administrative Code, Title 15A, Chapter 4B.0127 (b).
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Project Name and Location
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Date of Plan Approval Regional Engineer
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