20070208 Ver 2_More Info Letter_20071109

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Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
November 9, 2007
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Wake County Public School System
Attn: Mr. Michael Burriss
1551. Rock Quarry Rd
Raleigh, NC 27610
Project Name: Heritage High School
REQUEST FOR MORE INFORMATION-EXPRESS REVIEW PROGRAM
Dear Mr. Burriss:
Coleen H. Sullins, Director
Division of Water Quality
Wake County
EXP# 07-0208v2
On November 7, 2007, the Division of Water Quality tDWQ) received your response to our request for additional
information. The DWQ has determined that. this information is incomplete. Please provide the additional
information requested below in order to continue review of your project and to prevent denial of your application
as required by 15A NCAC 2H .0506:
1. General Information:
a. In order to achieve diffuse flow provisions, you have proposed a number of dissipater pads at the. end
of the .outflow pipes from all BMPs without. providing the outlet velocities of your dissipater pads.
Please provide information on the outlet velocities, including pipe sizes, slopes, and flow rates used for
sizing the aprons. Additionally, please provide elevations and invert levels necessary for construction
purposes on the appropriate site. plans and/or in the supporting documents.
b. Please provide Figure 8.06.b.2 used for sizing the aprons. Only Figure 8.06.b.1 is provided on page 4
of the supporting documents.
Level Spreader
a. The length of the proposed level spreader is too short. Please provide a length adequate for a design
flow of 1.269 cfs, and a forest filter strip. Please see Table 8.1 in the North Carolina Division of Water
Quality Stormwater Best Management Practices Manual. The length (ft) of level spreader lip needed
per cfs is missing on the Supplement Form.
b. Please sign and notarize the Inspection and Maintenance Agreement for the Filter Strip and Level
Spreader.
c. Please provide adate-stamped photo of the filter strip and the appropriate response as required in
Items 4 and 5 of the Required Items Checklist.
d. Please provide site plans that meet specified requirements in the Required Items Checklist. For
example, plan sheets C3.0, C3.2 and C 8.2 do not show the entire site and/or are not at the appropriate
scale.
3. Wet Detention Pond G
a. Flow from outlet structure associated with Wet Detention Pond G would not be diffused, but rather
channelize in the draw down slope of the. dissipater pad. Please relocate the outlet structure.

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]Intemet: http:/lh2o.enr.state.nc.us/ncwetlands
Noe Carolina
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Heritage High School
Page 2 of 4
November 9, 2007
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 Joseph Gyamfi or Lia Myott at 919-733-J~186 if you have any questions
regarding or would like to set up a meeting to discuss this matter. //
Sincere y,
yndi Karoly, Supe isor
401 Oversight/Express Review Permitting Unit
CBK/Jg
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
DLR Raleigh Regional Office
USAGE Raleigh Field Office
Central Files
File copy
Ms. Debbie Edwards, Soil & Environmental Consultants, P.A., 11010 Raven Ridge Rd., Raleigh, NC 27614