20071921 Ver 1_More Info Letter_20071212

Michael F. Easley, Governor
December 12, 2007
EXPRESS REVIEW NOTIFICATION LETTER
BSP Atlantic, LLC
Attn: Mr. Ed Hallberg
5400 Trinity Road, Suite 307
Raleigh, NC 27607
Project Name: BSP Atlantic
Dear Mr. Hallberg:
Coleen H. Sullins, Director
Division of Water Quality
Wake County
EXP# 07-1921
On December 11, 2007, the Express Review Program of the Division of Water Quality (DWQ) received additional
information from Mr. Todd Preuninger of Withers & Ravenel. The DWQ has determined that this information is
incomplete. Please provide the following information so that we may continue to review your project and
prevent denial of your application as required by 15A NCAC 2H .0506:
Discharge from BMP #1
a. Please extend the outlet pipe all the way to the stream at angle that will not cause erosion to the
streambank and provide sufficient riprap at the discharge point such that the streambed and banks shall be
stable. The currently proposed BMP outlet has a flow that is too high and will cause the formation of
channels and gullies in the buffer before reaching the stream.
b. Please provide outlet calculations for BMP# 1 as were provided for BMP#2.
2. Discharge from BMP #2
a. Please either extend the pipe all the way to the stream at an angle that will not cause erosion to the
streambank, and provide sufficient riprap at the discharge stream section such that the stream bed and
banks shall be stable OR
b. Please show that the existing Swale can handle the large flows from the BMP in addition to flows from
other drainage areas. In particular, please provide current photos (date and stamped), longitudinal slope,
detailed cross sections of the Swale and supported flow and velocity calculations for the 10-year storm to
meet the permissible velocities stipulated in the NC Stormwater Best Management Practices Manual.
3. PCN
a. Please ensure that any changes in stream or riparian buffer impacts due to BMP outlet modifications are
enumerated in a new version of your PCN form.
Please respond within five (5) days of the date of this letter by sending three (3) copies of this information. 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 contact Lia Myott at [phone] or Joseph Gyamfi at [phone] if you have any questions.
401 Oversight /Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX [phone] Internet: htto://h2o.enr.state.nc us/ncwetlands
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
NoithCarolina
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Sincerely,
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Cyndi Karoly, Supervisor
401/Express Review Oversite Unit
CBK/lem
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
DLR Raleigh Regional Office
USACE Raleigh Field Office
Central Files
.File copy
Mr. Todd Preuninger, Withers and Ravenel, 111 MacKenan Drive, Cary, NC 27511