19970656 Ver 1_More Info Received_19980210

KIM&CREED
M C
TO: DWQ Wetlands/401 Unit
Raleigh, N.C.
ATTENTION: Ray Cox
LETTER OF TRANSMITTAL
DATE: February 10, 1998
PROJECT NO: TASK NO:
RE: Partnerss Equity Group
TRANSMITTAL NO: PAGE OF
WE ARE SENDING: ? Originals x? Prints ? Shop Drawings ? Samples
? Specifications ? Calculations ? Other -
Quantity Drawing No. Rev. Description Status
2 revised plans
Issue Status Code: A. Preliminary B. Fabrication Only C. For Information D. Bid
E. Construction F. For Review & Comments G. For Approval H. See Remarks
Action Status Code: 1. No Exceptions Taken 2. Make Corrections Noted 3. Other
4. Amend & Resubmit 5. Rejected -See Remarks
REMARKS:
5625 DILLARD DRIVE, SUITE 117, CARY, NC 27511 [phone] FAX [phone]
cc: Dan Simmons McKIM & CREED ENGINEERS, PA
Signed
Sender
Document2
r k
Y [phone]
Fcnx
FAX [phone]
Matthew Roper, EIT
To: McKim and Creed Engineers
J. Ray Cox, EIT
From: DWQ Wetlands/401 Unit
Fax: [phone] Pages: 2
Phone: [phone] Date: 01/23/98
DWQ #970656
Re: Equity Partners Group
Factory Store of America
Johnston County
• Comments: I have begun reviewing the stormwater management plan for the subject project and
have identified the need for the following additional information:
1. The water quality pond must be sized and designed in accordance with the "Stormwater Best
Management Practices" document published by the Division of Water Quality in November, 1995.
In our phone conversation today, you indicated that you do have a copy of that document. I have
included a one-page checklist with this coversheet to help outline the specific information I need in
order to complete the review.
2. The 401 Certification issued for this project states, "An additional condition is that a final, written
stormwater management plan including an offsite wet detention basin and diversion of a portion of
the stormwater into the remaining onsite wetlands must be approved by DWQ before wetland (or
stream) impacts occur" The current submittal makes no mention of the diversion of any stormwater
into the remaining wetlands.
My review of the plan will resume when the above information is provided. If you have any questions
about anything in the BMP manual or in this additional information request, please call me at (919) 733-
1786. We can certainly set up a meeting to discuss these issues if necessary.
Thanks for your help and cooperation.

Project No. DWQ (to be provided by DWQ)
- 1f
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin and outlet structure details, and a
fully executed operation and maintenance agreement. An incomplete submittal package will result in a
request for additional information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name :
Contact Person:
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to:
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
Permanent Pool Surface Area
Drainage Area
Impervious Area
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
SA/DA used
Diameter of Orifice
ft. (average elevation of the floor of the basin)
ft. (elevation of the orifice invert out)
ft. (elevation of the outlet structure invert in)
sq. ft. (water surface area at permanent pool elevation)
ac. (on-site and off-site drainage to the basin)
ac. (on-site and off-site drainage to the basin)
cu. ft. (combined volume of main basin and forebay)
cu. ft. (volume detained on top of the permanent pool)
cu. ft.
(surface area to drainage area ratio)
in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices
manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the
following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why.
Applicants Initials
The temporary pool controls runoff from the 1 inch storm event.
The basin length to width ratio is greater than 3:1. 1f:? -eos6l@16
The basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than 6:1 is provided. I?
Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
The temporary pool draws down in 2 to 5 days.
The forebay volume is approximately equal to 20% of the total basin volume.
Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
* wAttitmtn 39 feat vegetative fHter is provided at the otitiet.
A site specific operation and maintenance (O&M) plan is provided.
A vegetation management/mowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the O&M plan.
A debris check is specified in the O&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
A responsible party is designated in the O&M plan.
FORM SWG100 09/97 Page 1 of 1
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