AddInfoRequest

November 7, 2017

Mr. Marc Houle, PE
Yarbrough-Williams & Houle, LLC
PO Box 1198
Pineville, NC 28134

Subject: Request for Additional Information
Stormwater Permit No. SW3170402 Modification
Waxhaw (formerly Henn) Storage Facility
Union County

Dear Mr. Houle:

The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on October 16, 2017. A preliminary
review of that information has determined that the application is not complete. The following
information is needed to continue the stormwater review:

1. Provide a soils report that includes the SHWT elevation within the footprint of each SCM
[sand filter MDC 1]. The soils report provided does not state a SHWT elevation.

2. Provide a completed supplement form for that sand filter, using the Supplement-EZ form
at: https://deq.nc.gov/about/divisions/energy-mineral-land-resources/energy-mineral-
land-permit-guidance/stormwater-bmp-manual

3. The WQv in the calcs is 603.47, but enough accumulated volume is not provided at that
elevation for the WQv. The plans show it at 604.5.

4. Revise sht. 10 to specify that the berm rip rap, filter sand, and underdrain stone shall be
washed.

5. Provide an easement around the SCM to a public right-of-way for access and
maintenance.

6. Provide pdfs of the initial modification application package using the link in item 7
below.

7. 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:
https://edocs.deq.nc.gov/Forms/SW_Project_Submittal

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 December 7, 2017, or
the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. 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.

Please reference the State assigned project number SW3170402 on all correspondence. If you
have any questions concerning this matter please feel free to contact me at
[e-mail] or [phone].

Sincerely,

Robert D. Patterson, PE
Environmental Engineer
Stormwater Program

ec: Mooresville Regional Office
Susan Henn – Henn Automotive, LLC