SW6180901_AddInfoRequest_20181003

Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
October 3, 2018
Mr. Wade J. Pudwill
Commercial Site Design
8312 Creedmoor Rd.
Raleigh, NC 27613
Subject: Request for Additional Information
Stormwater Permit No. SW6180901
Biscuitville — Cameron, NC
Harnett County
Dear Mr. Pudwill:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
WILLIAM E. TOBY VINSON, JR.
Interim Director
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on September 7, 2018. A review of that
information has determined that the application is not complete. The following information is
needed to continue the stormwater review:
1. Please upload the plan sheets and all other documents electronically at:
hltps:Hedocs.deq.nc.gov/Forms/SW ProjectSubmittal
2. The area shown on the post impervious exhibit in the stormwater management report as
"remaining pervious pavement" is not shown on the plans. Is this area going to be
pervious or impervious? Please label all permeable pavement areas on the plans.
3. Please add the permeable pavement detail and notes to the plan sheets.
4. Please specify the mix that will be used for the permeable pavement surface. The
required mixes for permeable pavement can be found on Page 9 of the Permeable
Pavement chapter in the Stormwater Design Manual:
h!tps:Hfiles.nc. gov/ncdeq/Energy%20Mineral%20and%2OLand%2OResources/Stormwate
r/BMP%20Manual/C-5 %20%2OP enneable%2OPavement%2004-06-17.pd£
5. The maximum ratio of additional built -upon area that may drain to permeable pavement
is 1:1 (Permeable Pavement MDC 7). The apparent drainage area to the permeable
pavement at the north end of the site is too large to meet this requirement.
6. Please provide calculations that show that the permeable pavement will have sufficient
depth to capture the entire design storm and will drain in less than 72 hours. For

calculating the drawdown time, please use a factor of safety as shown on Page 10 of the
permeable pavement chapter.
7. Please provide calculations showing that the inlet protection for the wet pond is sufficient
to prevent erosion during the 10-year storm.
8. Please submit an O&M Plan and agreement and complete a Supplemental EZ form for
the permeable paving system. Forms for all of these can be found here:
h!tps:Hdeg.nc. gov/about/divisions/energy-mineral-land-resources/energy-mineral-land-
permit-guidance/stormwater-bmp-manual.
9. Please submit plans showing the pre -construction and post -construction drainage areas.
10. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and 1 hardcopy of other
documents. Pdfs must be uploaded using the form at:
hltps:Hedocs.deq.nc.gov/Forms/SW ProjectSubmittal
Please note that this request for additional information is in response to a preliminary review.
The requested information should be received by this Office prior to November 3, 2018, or
the application will be returned as incomplete. The return of a project will necessitate
resubmittal of all required items, including the application fee. Please reference the State
assigned project number SW6180901 on all correspondence.
If you need additional time to submit the information, please submit your request for a time
extension to the Division at the contact below. The request must indicate the date by which you
expect to submit the required information. The Division is allowed 90 days from the receipt of
a completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
If you have any questions concerning this matter please feel free to contact me at
Corey.Anen(cncdenr.gov or [phone].
cc: Fayetteville Regional Office
Sincerely,
Corey Anen
Environmental Engineer
Stormwater Program
Nothing Compares.
State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources
512 N. Salisbury Street 1 1612 Mai Service Center I Raleigh, NorthCaroiina27699-1612
919 707 9200