20070503 Ver 2_More Info Letter_20070522

~QF W A r~RQ Michael F. Easley, Governor
`Q G William G. Ross Jr., Secretary
Cr) ~ North Carolina Department of Environment and Natural Resources
~ ~
p .~ Alan W. Klimek, P.E. Director
Division of Water Quality
May 22, 2007
DWQ EXP No. 07-0503v2
Mills Park Elementary School (E22) Site
Wake County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Wake County Public School System
Attn: Mr. Timothy Driscoll
Planning and Construction Department
1551 Rock Quarry Road
Raleigh, NC 27610
REQUEST FOR MORE INFORMATION-EXPRESS REVIEW PROGRAM
On May 21, 2007, the Division of Water Quality (DWQ) received your application for the Mills Park
Elementary School (E22) site and met with you to discuss the submittal. The DWQ has determined that
your application will require additional information. Please provide the following information so that
we may continue to review your project:
1. Please update your PCN Application with the modified acreage calculations including the proposed
road acreage and the associated BMP locations. You may remove the proposed Middle School site
from the project boundary if approved by the USACE.
2. Bioretention No. 1 and 2: You have indicated a design depth of 6 feet and excessive inlet
velocities. Additionally, Bioretention no. 2 does not have sufficient surface area. Please design the
Bioretention facilities according to the 1999 or the draft 2005 Stormwater BMP Manual (NC
DENR).
Two obligate (OBL) tree. species are included in your Bioretention planting plan: Nyssa aquatica
and Taxodium distichum. Obligate species are not recommended for Bioretention areas because
they are not tolerant to periods of drought (Bioretention areas are designed not to hold water).
Please revise your Bioretention planting plan to replace these two species with more tolerant species
such as American elm (Ulmus americana), Eastern redbud (Cercis canadensis), or American
sycamore (Platanus occidentalis).
Please respond within five (5) days of the date of this letter by sending five (5) copies of this information.
The Express Review Program is a process that requires all parties to participate in a timely manner. If the
DWQ feels the Express Review Program is the incorrect review program for your project, then we may
have to return your application and have it reviewed through our regular 401 Water Quality Certification
Program.
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: http:/Ih2o.enr.state.nc.us/ncwetlands
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Mills Park Elementary School (E22) Site
DWQ No. 07-0503v2
Page 2 of 2
May 22, 2007
This letter only addresses the application review to date and does not authorize any impacts to wetlands,
waters or protected buffers. Please contact Cynthia Van Der Wiele at [phone] or Lia Myott at
[phone] if you have any questions.
CBK/lem
Sin ly
Cyndi Karoly, Supervisor
401 OversightlExpress Review Permitting Unit
cc: DWQ Raleigh Regional Office
USACE Raleigh Regulatory Office
File copy
Central Files
Christopher J. Burkhardt, Froehling & Robertson, Inc., 310 Hubert St., Raleigh, NC 27603
Sheila Reeves, P.E., Dewberry and Davis, 2301 Rexwoods Drive, Suite 200, Raleigh, NC 27612