NC0090247_Additional Information Request_20240319

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Henderson County
ATTN: Marcus Jones
1 Historic Courthouse Square, Ste 6
Hendersonville, NC 28792
Dear Mr. Jones:
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NORTH CAROLINA
Environmental Quality
March 19, 2024
Subject: Request for Additional Information
Draft NPDES Permit NCO090247
Clear Creek WWTP
Henderson County
The Division has reviewed the public comments submitted for the subject draft NPDES permit
NCO090247 — Clear Creek WWTP. After looking closer at the modelling done on Mud Creek for
Hendersonville WWTP, we would like to request more information to ensure that the proposed discharge
would be protective of the downstream water quality. To enable us to complete our review in accordance
with N.C.G.S. 143-215.1 and 15A NCAC 2H.0105, please provide additional or revised information as
following:
1. Perform a QUAL2K model for the proposed discharge that also include downstream of the
discharge point of Hendersonville WWTP. The result should ensure that the proposed discharge
would be protective of both Clear Creek and Mud Creek downstream.
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2. Provide a revised Present Value Cost Analysis in Engineering Alternative Analysis for the Direct
Discharge option to base effluent limits on BOD5 = 10.0 mg/L and NH3 as N = 2.0 mg/L. These
limits are maintained at the same levels as the Hendersonville WWTP to ensure that it would be
protective of downstream water quality at Mud Creek as well.
Please submit the requested information within 30 calendar days of this letter to ensure the Division has
adequate time to review and reach a final decision on the draft permit. If you have any questions, please
contact me at 919-707-3619, or via e-mail at siyin .cg henkdeq.nc.gov.
Sincerely,
<;fJJ C6.",
Siying Chen
Environmental Specialist II
NPDES Compliance and Expedited Permitting Unit
ec: NPDES File [Laserfiche]
NC DEQ Division of Water Resources — Julie Gryzb
NC DEQ Division of Water Resources — Mike Montebello
NC DEQ Division of Water Resources — John Hennessy
CDM Smith — Anish Luthra [[e-mail]]
CDM Smith — Jonathan Lapsley [[e-mail]]
DEQ ,fJ North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
NORTH CAROLINA (J1(�.'�O'�.(�OQO
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