20100249 Ver 1_More Info Letter_20100421

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NCDEE R
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
April 21, 2010
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Dr. Venkatasomaiah C. Motaparthy
Motaparthy Properties, LLC
105 Cashwell Drive
Goldsboro, NC 27534
Project Name: Smithfield Business Park
REQUEST FOR MORE INFORMATION
Dear Mr. Motaparthy:
DWQ EXP # 10-0249
Johnston County
On April 20, 2010, the Express Review Program of the Division of Water Quality (DWQ) received a an
application dated April 20, 2010 along with supporting information including stormwater management
plan dated April 16, 2010 (Engineer's Seal), design calculations, operation and maintenance (O & M)
agreements among others for the purpose of constructing the proposed "Smithfield Business Park" in
Johnston County. Please provide the following information so that we may continue to review your
project and prevent return of your application as required by 15A NCAC 2H.0506:
Additional Information Requested:
1. The water quality treatment volume from 1-inch design storm required to be drawn down in 2-5 days
is approximately 38,693 cf (as opposed to 115,596 cf from 2.96 inch storm), and therefore draws
down in less than 2days with the 6-inch orifice. While you can store more than the minimum design
volume above the permanent pool elevation, it is important that you select an appropriate orifice
diameter to achieve a drawdown time in the required range for the design volume.
2. Please revise the supplement form accordingly to reflect comment 1, including minimum volume
required and drawdown calculations.
3. This office recommends that the top elevation of the right portion (running E-W) of the forebay berm
be reduced to contour elevation 146.5ft (permanent pool elevation) or 147ft (at most). This will help
divert the flow of water to achieve the desired flow path as indicated on the plans.
4. It is also recommended that the berm protruding from the right side (running SW-NE) into the pond
be reduced to about half the length of that shown on the plans. The midsection of the pond appears
too narrow.
5. Please correctly label the contours in the plan and cross sectional views of the pond, and revise the
normal pool contour elevation in the typical shelf planting detail. The cross sections can be drawn
larger so as to be able to show elevations properly. Please use 1": 20' scale as required in the
Required Items Checklist.
6. Please show a typical Swale section for Swales A - E and include a table with design and construction
information on the plans.
7. Please provide buoyancy (anti-flotation) calculations for the outlet structure.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
Location: 2321 Crabtree Blvd., Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet: http://h2o.enr.state.nc.us/ncwetiands/
One
NhCarolina
Iaturallr?
An Equal opportunity 1 Affirmative Action Employer
Smithfield Business Park (Johnston)
Page 2 of 2
April 21, 2010
Please respond within five (5) days of the date of this letter by sending two (2) copies of the above
information and any revisions in writing. The Express Review Program is a process that requires all
parties to participate in a timely manner.
This letter only addresses the application review and does not authorize any impacts to wetlands, waters or
protected buffers. Please be aware that any impacts requested within your application are not authorized (at
this time) by the DWQ.
Thank you for your attention to this matter. If you have any questions or wish to discuss these matters
further please do not hesitate to call Joseph Gyamfi or Lia M. Gilleski at 919-733-1786.
Sincerely
Ian McMillan, Acting Supervisor
401 Oversight/Express Review Program
IJM/jg
cc: File copy
DWQ - RRO
Debbie Edwards, S&EC, PA, 11010 Raven Ridge Rd, Raleigh, NC 27614
¦ Complete items 1, 2, and 3. Also complete
Item 4 if Restricted Delivery is desired.
¦ Print your name and address on the reverse
so that we can return the card to you.
¦ Attach this card to the back of the mail piece,
or on the front If space permits.
1. Article Addressed to:
DR VENKATASOMAIAH MOTAPARTHY
MOTAPARTHY PROPERTIES LLC 4/22/10
105 CASHWELL DR
GOLDSBORO NC 27534
DWQ EXP 10-0249 JOHNSTON COUNTY
? Agent
? Addressee
A. Signature
C.
D. Is delivery a ress different from Item 1? ? Yes
If YES, a er el' ery address below: ? No
l
3. Service Type -
Certified Mail ? Express Mail
Registered ? Return Receipt for Merchandise
? Insured Mail ? C.O.D.
4. Restricted Delivery? (Extra Fee) ? Yes
2. Article Number 7009 2820 0004 4137 2056
(Transfer from service /a6e1)
PS f=orm 3811, February 2004 Domestic Return Receipt 102595-02-M-1 540
UNITED STATES F?OSTAL~SERVICI n
First Glassf lt?
. prmif'No. G-
• Sender: Please print your name, address, and ZIP+4 in this box •
NC DENR DIVISION 017 WATER QUALITY
401 OVERSIGHT/EXPRESS UNIT
2321 CRABTREE BOULEVARD, SUITE 250
RALEIGH, NC 27604