AddInfoRequest - Blue Ridge Electric

Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
May 17, 2018
Mr. Joe Ervin, PE
UC Synergetic, LLC
123 N. White St.
Fort Mill, SC 29715
Subject: Request for Additional Information
Stormwater Permit No. SW4180301
Blue Ridge EMC Lansing Substation — Lansing, NC
Ashe County
Dear Mr. Ervin:
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 March 26, 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. In accordance with 15A NCAC 02H.1003(2), low density projects must be designed to
maximize dispersed flow through vegetated areas and minimize channelization of flow.
Stormwater that cannot be released as dispersed flow shall be transported by vegetated
conveyances. Riprap channels are not considered vegetated and thus do not meet this
requirement. Please revise the plans to maximize the use of vegetated conveyances.
2. As explained above, runoff from the substation must be discharged using either dispersed
flow or vegetated conveyances. As currently designed, it will be piped and discharged as
concentrated flow.
3. The side slopes of all swales must be no steeper than 3:1 (horizontal to vertical). As
currently designed, they are 2:1, and thus do not meet the low density regulations.
4. As indicated on Sheet 11, the shear stress in swale 3 is greater than the permissible shear
stress.
5. Part V of the Low Density Supplement (Swale System Maintenance Requirements) must
be completed, signed, and notarized.
6. Please complete Part VI (Submittal Requirements) of the Application Form.

7. The plans should indicate the swales as being recorded in a permanent drainage
easement.
8. Provide pdfs of all revisions, 2 hardeopies of revised plan sheets, and 1 hardcopy of other
documents. Pdfs must be uploaded using the form at:
hltps:Hedocs.deq.nc.gov/Fonns/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 June 15, 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 SW4180301 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(d),ncdenr. og_v or [phone].
Sincerely,
Corey Anen
Environmental Engineer
Stormwater Program
cc: Winston-Salem Regional Office
Mike High, PE — Blue Ridge Electric Members Corporation
Nothing Compares.
State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources
512 N. Salisbury Street 1 1612 Maii Service Center I Raleigh, Nort hCaroiina27699-1612
919 707 9200