SW3240501_Response To Comments_20240607

Erik Messina
Subject: RE: [External] RE: Project Hoist; Rowan County
External Email
Good Afternoon,
We received additional information for your application for a new post-construction stormwater permit on 5/2/24.
At this time,the submission is not administratively complete and cannot be accepted for review in its current
condition. Please provide the following submittal items by close of business on 5/22/24 so that we may accept the
project and begin the review process, otherwise,the project will be returned as administratively incomplete.
• 2x hard copies of the Application with the following corrections made(These items are required per 15A
NCAC 02H .1042(2)(a)and per Section VI, 1 of the Application):
• Section I,4—The provided coordinates do not correspond to the project area (see attached).
Please revise. Coordinates have been revised.
• Section II,4—Please indicate the other applicable permits that will be required for this project.
Most projects require, at a minimum, an E&SC permit. Please revise as needed. E&SC Permit
Added.
• Section III, 2—Per 15A NCAC 02H .1040(1)(d), acceptable signing officials for local government
entities include a principal executive officer, ranking official, or other duly authorized employee.
Please provide documentation showing that Mr. Powers is authorized to sign on the County's
behalf or revise the signing official. Email from Rowan County Manager included.
• Section IV, 6—Per the USGS topo map,there appears to be surface waters located on-site (see
attached). Please account for these surface waters in this section of the Application (and Line 4 on
the cover of the Supplement-EZ Form), recalculate the project area and percent BUA for the site as
needed, and ensure that these surface waters and associated vegetated setbacks are clearly
shown on the plans(required per 15A NCAC 02H .1042(2)(g)(iii)). Surface waters and BUA updated.
• Please provide a signed and notarized operation and maintenance form (available at the following
website: https://www.deq.nc.gov/about/divisions/energy-mineral-and-land-
resources/stormwater/stormwater-program/stormwater-design-manual).This item is required per
Section V&VI,3 of the Application and 15A NCAC 02H .1042(2)(j). NOTE:The provided
maintenance agreements are outdated and no longer accepted. Revised O&M included.
• 2x signed &sealed hard copies of a plan sheet showing the following corrected additions:
• Drainage area to the SCM delineation.This item is required per 15A NCAC 02H .1042(2)(g)(iv)&
Section VI, 8o of the Application. It is noted that a drainage area delineation is included in the
calculations, however this item is required to be provided in the main set of plans. Revised DA
Maps added at 24x36 for inclusion in plan set.
• Surface water and vegetated setback delineation.This item is required per 15A NCAC 02H
.1042(2)(g)(iii) &Section VI, 8h &p of the Application. Jurisdictional Determination included.
Please only provide the revised page(s).
While not required for administrative completeness,the following issues were noted during review(which may
be brought up in more detail during the technical review):
- It is strongly recommended to reduce the area draining to a sand filter to no more than 5.0 acres and to
reduce the percent imperviousness of the drainage area as both of these factors increase the amount of
fine particles that enter the SCM, causing it to clog, requiring more frequent maintenance, and increasing
the cost of ownership over the life of the SCM. It is recommended to either pick a more suitable SCM for
the site or to reconfigure the drainage area to the SCM (using two smaller sand filters instead of a single
i

large sand filter may be required). Owner understands maintenance requirements. According to the
NCDEQ Stormwater BMP Manual—"Sand Filters will function much better when the drainage area is highly
built-upon because this will greatly reduce the amount of fines that reach the sand filter.There is no
maximum drainage area for sand filters"
- Please ensure that sufficient BUA is being captured and treated in the SCM. In order for a project to meet
Runoff Treatment,the net increase in BUA must be captured and treated in one or more primary SCMs(if it
is not practicable to do this,the Division may allow the site to be permitted as a project with areas of high
and low density in accordance with 15A NCAC 02H .1003(1)(d). Due to site constraints:topography,
surface waters,easements, etc. it is not possible to capture the driveway entrance into the SCM. All other
impervious has been captured in the SCM.
- Sand Filter MDC 2—Please ensure that the volume provided in each chamber of the sand filter is
equivalent(the sand filter chamber appears to be larger than the sediment chambers). Updated SCM
Calculations.
- The provided soil borings appear to indicate the encountered ground water level, not the seasonal high
water table.The seasonal high water table elevation is required for determining separation requirements.
Letter provided indicating SHWT information.
- Application, Section IV, 10, Percent Impervious Area—Please ensure that this value reflects the percent
BUA for the drainage area to the SCM and not for the entire project area. Updated application
NOTE:This is an administrative completeness review, not a detailed engineering review,there may be other issues
that may be brough up during the engineering review.
If these items are received within the stipulated timeframe,we can accept the project and begin the review
process. Once accepted, reviews under the standard permitting process can take up to 90 calendar days per
statute (one of our two reviewer positions is currently vacant).
NOTE:While Kaitlin is out of the office and while she is catching up on her work after returning, administrative
completeness reviews may take longer than they typically do. We apologize for the inconvenience.
Hard copies should be mailed to the following address:
For USPS:
Jim Farkas
1612 Mail Service Center
Raleigh, NC 27699-1612
For Fed Ex/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640E
Raleigh, NC 27604
If you have any questions, please contact Jim Farkas at [e-mail] or at(919) 707-3646.
Thank you,
From: Erik Messina <[e-mail]>
Sent:Tuesday, May 14, 2024 8:23 AM
To: Powers, William C<[e-mail]>; Maggie Houston <[e-mail]>;
Farkas,Jim J <[e-mail]>; Lawyer, Mike<[e-mail]>; Sanford,Joyce
<[e-mail]>
Cc: Peterson, Kathryn S<[e-mail]>; svc_post_construction_stormwater
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