NCS000122_Permit Cover_20190715

RaY 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
July 15, 2019
Subject: Draft NPDES Stormwater Permit
Permit No. NCS000122
General Timber Inc.
Lee County
Enclosed with this letter is a copy of the draft stormwater permit for your facility. 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 III, Chromium VI, 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;
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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 1I, 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 II1, Section A, 2 (b) and (g).
7. Impaired water parameters have been updated to reflect 2018 analytical data.
Please review the draft permit and submit any comments to me no later than 30 days following
your receipt of the draft. Comments maybe emailed to meat lauren. ag [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 (919)
707-3648.
Sincerely,
Lauren Garcia
DEMLR Stormwater Division
Attachment: Draft Permit NCS000122
cc: Greg Williams, General Timber, Inc., [e-mail]
Thad Valentine, DEMLR Raleigh Regional Office, [e-mail]

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