NC0038377_Mayo letter (prioritization)_20181113

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
Paul Draovitch
Senior Vice President
Environmental, Health & Safety
Duke Energy
526 South Church Street
Mail Code EC3XP
Charlotte, North Carolina 28202
NORTH CAROLINA
Environmental Quality
November 13, 2018
Subject: Final Classification of the Coal Combustion Residuals Surface Impoundment
located at Duke Energy's Mayo Steam Electric Plant, Person County, NC,
Pursuant to N.C. Gen. Stat. § 130A -309.213(d)(1).
Dear Mr. Draovitch:
Pursuant to the Coal Ash Management Act (HB 630, Session Law 2016-95), the North Carolina
Department of Environmental Quality (NCDEQ) has determined that Duke Energy has met the
low-risk classification criteria set forth in N.C. Gen. Stat. § 130A -309.213(d)(1) for the coal
combustion residuals surface impoundment, called the Active Ash Basin, located at Duke
Energy's Mayo Steam Electric Plant in Person County, NC. NCDEQ makes the following
specific findings:
1. Duke Energy has established permanent water supplies as required for the above
referenced impoundment pursuant to N.C. Gen. Stat § 130A -309.211(c1). See Exhibit 1
(Duke Energy Alternate Water Supply Submittal) and Exhibit 2 (NCDEQ Alternate
Water Supply Approval); and
2. Duke Energy has rectified any deficiencies identified by, and otherwise complied with
the requirements of, any dam safety order issued by the Environmental Management
Commission for the above referenced impoundment pursuant to N.C. Gen. Stat. § 143-
215.32. Specifically, the above referenced impoundment at Duke Energy's Mayo Steam
Electric Plant was not subject to Dam Safety Order 16-01 (issued on August 22, 2016)
and was inspected by NCDEQ with no deficiencies noted. See Exhibit 3 (Dam Safety
Order 16-01), Exhibit 4 (Dam Inspection Report), Exhibit 5 (October 3, 2018 DEMLR
Letter Regarding Dam Safety Order 16-01 Compliance Status), and Exhibit 6 (October
10, 2018 EMC Meeting Minutes).
D, E Q
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North Carolina Department of Environmental Quality
217 West Jones Street 1 1601 Mail Service Center I Raleigh, North Carolina 27699-1601
919.707.8600

Based upon the determinations above and in accordance with the Coal Ash Management Act,
NCDEQ classifies the coal combustion residuals surface impoundment, called the Active Ash
Basin, at Duke Energy's Mayo Steam Electric Plant as low-risk.
If you have any questions about NCDEQ's determinations provided in this letter, please contact
me at [phone].
Sincerely,
a.. -L C. W"
Sheila Holman
Assistant Secretary for Environment
cc: Linda Culpepper, NCDEQ, Director, Division of Water Resources (no attachments)
Michael Scott, NCDEQ, Director, Division of Waste Management (no attachments)
Toby Vinson, NCDEQ, Director, Division of Energy Mineral and Land Resources (no
attachments)
Bill Lane, NCDEQ, General Counsel (no attachments)
NCDEQ Central File
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North Carolina Department of Environmental Quality
217 West Jones Street 1 1601 Mail Service Center I Raleigh. North Carolina 27699-1601
919.707.8600