NC0004774_Seep Management Amendment_20220418

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ELIZABETH S. BISER -; ,
Secretary cr 44.
RICHARD E. ROGERS, JR. °R a.woo
Director NORTH CAROLINA
Environmental Qualit
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April 18, 2022
Ms. Jessica Bednarcik, Senior Vice President EHS
Duke Energy
526 S. Church Street
Mail Code EC3XP
Charlotte,NC 28202
Subject: Seep Management Amendment to Corrective Action Plan Conditional Approval
Duke Energy Carolinas, LLC—Buck Steam Station
NPDES Permit NC0004774
Special Order by Consent S 18-004
Rowan County
Dear Ms. Bednarcik:
On September 21, 2020, Duke Energy Carolinas, LLC (Duke Energy) submitted a Seep Management
Plan Amendment to the proposed Corrective Action Plan(CAP) for the Buck Steam Station to satisfy
the terms of Section 2.d. of Special Order by Consent(SOC) S 18-004. The Department of
Environmental Quality(DEQ)has reviewed this submittal and hereby provides its conditional approval
of the Seep Management Plan as an amendment to initial groundwater CAP documents prepared for
the site and submitted in November 2015 and February 2016. This approval has been provided as
conditional because it is anticipated that an updated, comprehensive CAP will be submitted for this
site.
This conditional approval shall remain effective until an updated CAP for the Buck Steam Station is
approved, at which time the management of seeps will be regulated by its terms. Until the monitoring
of seeps is modified by the terms of an approved, updated CAP, Duke Energy shall provide semi-
annual monitoring of seeps as described in Section 3.6 of the Seep Management Plan. Reporting of the
results of testing should continue to be submitted to DEQ via the email address used for the reporting
of SOC data([e-mail]). This conditional approval is also cognizant of the potential for
changes in the circumstances of the seeps at the site while it is in effect, and DEQ reserves its rights to
require additional or modified monitoring of seeps should circumstances warrant.
This conditional approval is sufficient to activate the SOC termination provision for the Buck Steam
Station found in Section 2(b)(4)of SOC S 18-004. As a result, SOC requirements for this facility shall
terminate on May 18, 2022 (30 days following the date of this letter), and,paired with the termination
of the SOC for the Belews Creek Steam Station(affirmed October 8, 2021), SOC S18-004 shall
terminate in its entirety on that date.
DEQ NorthNorth CarolinaSalisbury DepartmentStreet !o1617f EnvironmentalMailServiceCenter Raleigh
Quality I Division of Water Resources
512 .North Carolina 27699 1617
/'" 919.707.9000

Ms. Jessica Bednarcik
Buck Steam Station Seep Management Plan Conditional Approval/SOC Termination
p• 2
If you have any questions about this letter please contact Bob Sledge at [phone] or via email at
[e-mail].
Sincerely,
Richard E. Rogers,J .
ec: Laserfiche Files
Jeff Poupart
Eric Smith
Andrew Pitner- MRO
Shannon Langley—Duke Energy
cc: SOC File