SW3240203_Response To Comments_20240522

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ROY COOPER u iak - o
Governor ■I ;j-A -
ELIZABETH S.BISER �, ,; � ;:
Secretary ' EkQurMv'ot`*
WILLIAM E.TOBY VINSON,JR NORTH CAROLINA
Interim Director Environmental Quality
May 20, 2024
Wilson Engineering Group
Attn: Jesse W. Wilson, PE
1001 Chestnut Drive
Smithfield,NC 27577
AND
Union Shrine Properties, LLC
Attn: William Cox, President
124 Brightland Run
Monroe,NC 28112
Subject: Request for Additional Information
Stormwater Permit No. SW3240203
Union County Shrine Club
Union County
Dear Mr. Wilson and Mr. Cox: 5/21/24 Responses provided below in red.
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on February 20, 2024. A review of that
information has determined that the application is not complete. The following information is
needed to continue the stormwater review:
1. As designed, the provided swales do not meet the design requirements outlined in 15A
NCAC 02H .1003(2)(c)(i). The provided side slopes, 2:1, are steeper than the maximum
allowable of 3:1 (no engineering calculations/on-site soil investigation showing that the
2:1 slopes will remain stable in perpetuity was provided). Please revise as needed.
Ditch calcs are revised using 3:1 side slopes and 7.90 in/hr intensity.
2. Please correct the following issues with the swale drainage area map plan sheet (drainage
features in the plan set are required per 15A NCAC 02H .1042(2)(g)(iv)):
a. The drainage area information for swales 1, 2, & 3 have two sets of impervious area
values (one of the values, 1,382.54 sf appears to have been copy&pasted as it
appears in each of the drainage area callouts). Please revise as needed.
Typo for 1,382.54 sf is corrected for Swales 1, 2&3 on Drainage Area Delineation Sheet.
b. The slope for swale 4 is shown on this plan sheet as 1.10%whereas it is shown as
1.07% in the other submittal materials. Please revise as needed.
Swale Slope 4 is revised to 1.07%on Drainage Area Delineation Sheet and is consistent with
revised Ditch Calculation Spreadsheet.
D
E - North Carolina Department of Environmental Quality I Division of Energy,Mineral and Land Resources
'-_)) 512 North Salisbury Street 11612 Mail Service Center I Raleigh,North Carolina 27699-1612
NORTH CAROLINA v
Department of Environmental auenry 919.707.9200

3. Please correct the following issues with the calculations (calculations are required per
15A NCAC 02H .1042(2)(f)):
a. Please provide a source for the rainfall intensity value used in the equation. Per
NOAA Atlas 14 data (available here:
https://hdsc.nws.noaa.gov/pfds/pfds_map_cont.html), the 10-year, 5-minute rainfall
intensity is approximately 7.90 in/hr for this location. Please revise as needed.
The original source was NOAA Atlas 14 data for Monroe, NC but was not address specific.The intensity is revised
to 7.90 in the ditch calculation spreadsheet.
b. Please indicate how the composite rational coefficient, C, value was computed for the
different drainage areas. If an equation was used to calculate the C value based on the
pervious and impervious areas of the drainage area,you can just include the equation
used under the table. Please revise as needed.
A sample calculation is provided on the revised dictch calculation spreadsheet.
4. Please correct the following issues with the O&M Agreement Form (This item is required
per 15A NCAC 02H .1042(2)(j)):
a. Please indicate the type of low-density project that this is in the drop-down menu next
to "Type:" on the Low-Density line of the form. The form uses macros to generate the
correct information based on what is entered into the cover page of this form.
Selecting"Vegetated swales/roadside ditches" as the type removes the curb-outlet
swale O&M requirements (which were included in the provided O&M Agreement
Form) if the project does not have curb-outlet swales. Please revise as needed.
The Macro does not appear to be working,so we are unable to load the proper sheet that excludes the curb-outlet
swales information.We received the excel spreadsheet from your office.The form is corrected,signed&included.
5. Please correct the following issues with the Supplement-EZ Form:
a. Cover Page:
i. Line 7—Please include the width of the vegetated setback from surface waters
required per 15A NCAC 02H .1017(10). It is noted that there are no surface
waters located on-site, however we ask that this value be included on this form
(Lines 8 & 9 can remain as "N/A"to indicate that there are no surface waters
located on-site).
We included the minimum 30'setback stipulated in 15 NCAC 02H.1017(10)in Line 7 of the Cover Page.
b. Drainage Areas Page:
i. General—Provided surface areas only need to be precise to the whole square foot
(the permittee may find it difficult to verify BUA areas to that level of precision).
ii. Line 19—This item is not needed for a low-density project.
e We reformatted the cells to show only whole square footage on the Drainage Area Page.
d. Low-Density Page:
i. Line 4— See earlier comment with regard to swale side slopes.
ii. Line 12—This item is required per 15A NCAC 02H .1003(4)(e).
iii. Swale design information and Line 5 —Revise as needed, see earlier comment
with regard to swale side slopes.
Line 4 is corrected to 3:1 Max Side Slopes.Line 12 is answered.Line 5 is revised based on the maximum
flow from the revised ditch calculation spreadsheet.
6. Please provide a Response to Comments letter indicating, in a point-by-point manner,
how each of the above comments has been addressed. This item is required per 15A
NCAC 02H .1042(3)(b).
This letter with red letter responses serves as the Response letter.
Also, in response to your May 20, 2024 (4:01 pm) email regarding the
permitee's email address: The email provided in the form is correct. The
email address in the forwarded and copied emails
"[e-mail]" should be [e-mail]

7. Provide PDFs of all revisions, 2 hardcopies of revised plan sheets, 1 hardcopy of other
documents, and a response to comments letter briefly describing how the comments have
been addressed.
a. PDFs must be uploaded using the form at:
https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload
b. Hard copies must be mailed or delivered to the following address:
i. For FedEx/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640M
Raleigh,NC 27604
ii. For USPS:
Jim Farkas
1612 Mail Service Center
Raleigh,NC 27699-1612
iii. Hand Delivery:
Please reach out to me prior to hand delivering a submission to make sure that I
(or someone else in my group)will be able to receive the submission. Do not
leave the package in the foyer with the security guard.
NOTE: Hard copies should not be sent to a Regional Office. Doing so will delay
the review process and the submission package may be lost while being sent from
the Regional Office to me in the Central Office.
To ensure a fair, timely, and transparent review process, any disagreement with provided
comments will need to be addressed in writing as part of the requested information resubmission,
within the required resubmittal window. The merits of the disagreement will be reviewed during
the next scheduled technical review and, if applicable, will be addressed in further requests for
additional information. If the resolution provided by the reviewer is found to be unsatisfactory,
the applicant can agree in writing to a longer review period, during which the dispute will be
brought to the technical review committee and a final determination will be made.
Due to staffing limitations and to ensure an efficient project review, requests for individual
meetings to discuss provided comments are decided at the discretion of the reviewer. We
encourage you to carefully review the written feedback provided and the applicable rules. The
NCDEQ Stormwater Design Manual provides additional insight into design criteria. Any
questions or further requests for clarification should be submitted in writing in the requested
information resubmission, within the required resubmittal window. We appreciate your
understanding and cooperation in this streamlined process.
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 19, 2024, 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 SW3240203 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
[e-mail] or(919) 707-3646.
Sincerely,
Jim Farkas
State Stormwater Engineer
DEMLR Post-Construction Stormwater Program
cc: Mooresville Regional Office