NCS000122_Draft Permit Cover Letter_20201012

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Interim Director
Mr. Greg Williams
General Timber, Inc.
625 Farmville Coal Mine Road
Sanford, NC 27330
Dear Mr. Williams:
NORTH CAROLINA
Environmental Quality
October 12, 2020
Subject: Draft NPDES Stormwater Permit
Permit No. NCS000122
General Timber Inc.
Lee County
Enclosed with this letter is a copy of the DRAFT stormwater perit7il foi your fac,ilfty.
Please review the draft carefully to ensure thorough understanding of the conditions
and requirements it contains.
The draft permit contains the following significant changes from the facility's current
permit:
1. You are required to collect analytical and qualitative monitoring samples
during "measurable storm events" as defined in Part II, Section B. This term is
different from the "representative storm event" in earlier permits.
2. Requirements for the Stormwater Pollution Plan (SPPP) have been updated in Part
II, Section A.
3. Chromium and Arsenic have been added as monitoring parameters.
4. Changes have been made to several monitoring parameters, including a change to
two benchmarks. Stormwater benchmarks are not permit limits, but rather
guidelines for implementing the Stormwater Pollution Prevention Plan (SPPP). A
benchmark exceedance is not a permit violation; however, the permittee must
respond to exceedances as directed in the Tiers.
• The benchmark for the following parameter has been revised to reflect current
water quality standards: Copper benchmark is increased from .007 mg/L
to .010 mg/L;
EQ
�� North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources
_ 512 North Salisbury Street 1 1612 Mail Service Center I Raleigh, North Carolina 27699-1612
919,707.9200

Vehicle maintenance (Tables 5,6) monitoring parameters have been revised as
follows:
o Non -Polar Oil & Grease [EPA Method 1664 (SGT-HEM)] replaces Oil &
Grease/TPH. The benchmark for Non -polar Oil & Grease using this method
is 15 mg/L. This requirement appears in all individual stormwater permits;
however, it only applies to facilities that perform onsite vehicle maintenance
activities. If the facility begins vehicle maintenance during the permit cycle,
the requirements shall apply.
o pH monitoring is no longer required for discharges only associated with
vehicle maintenance activities.
4. Tiered responses have been added to this permit. Exceedances of benchmark
values require the permittee to increase monitoring, increase management actions,
increase record keeping, and/or install stormwater Best Management Practices
(BMPs) in a tiered program in accordance with Part II, Section B of this permit.
S. A new section on Special Conditions has been added in Part I1, Section E to comply
with federal regulations requiring electronic submittal of discharge
monitoring reports.
6. Civil and administrative penalty amounts have been updated to reflect current
federal law in Part III, Section A, 2(b) and (g).
7. Impaired wafer parameters leave been updated to reflect 2018 analytical data.
Please review the draft permit and submit any comments to me. Due to our large backlog
and need to finalize permits in a timely manner, please submit comments no later than 15
days following your receipt of the draft. If you should need more time to review the permit,
please contact me within 15 days to request more time. Comments may be emailed to me at
[e-mail] or mailed to my attention at NC DEMLR, Stormwater Permitting
Program,1612 Mail Service Center, Raleigh, NC 27699-1612. If you have any questions,
please email me or call me at [phone].
Sincerely,
dNwcoa4a/
Aana Gamble
DEMLR Stormwater Division
Attachment: Draft Permit NCS000122
cc: Jordan Davis, Hunt Environmental Associates, [e-mail]
Thad Valentine, DEMLR Raleigh Regional Office, [e-mail]