20080214 Ver 1_More Info Letter_20080215

~QF WATF9Q Michael F. Easley, Governor
`~ ~i William G. Ross Jr., Secretary
~ rte.- North Cazolina Department of Environment and Natural Resources
~ ~
~ ~- Coleen H. Sullins, Director
Division of Water Quality
February 15, 2008
DWQ EXP No. 08-0214
Wake County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Wake County Public School System
Attn: Mr. Charles French
1551 Rock Quarry Road
Raleigh, NC 27610
Project Name: E-27 (Fuquay Elementary School)
REQUEST FOR MORE INFORMATION
On February 14, 2008, the Express Review Program of the Division of Water Quality (DWQ) received
your application for the above referenced project. 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 and prevent denial of your application as required by 15A NCAC 2H .0506:
Additional Information Requested
Bioretention Area A:
a. Please provide a completed BMP Supplement for the proposed Bioretention including the
design summary and the required items checklist.
b. Please specify the source and permeability of soil media on plan sheet C7.9 (1"-2" per hour is
preferred). Please be reminded that the ponded water shall completely drain into the soil
within 12 hours, and to a level of 24 inches below the soil surface within 48 hours.
c. Allowable range of phosphorus index is 10 - 30. Sheet C7.9 indicates a P-Index of less than
50. Please revise the P-index to conform to the acceptable range.
2. Exterior Level Spreader (Receiving flow from Bioretenton)
a. Please provide Level Spreader Supplement Form (design summary and required items
checklist) along with a notarized Inspection and Maintenance Agreement Form.
Stormwater Wetlands B 1 and B2:
a. Please provide a completed BMP Supplement for each proposed BMP including the design
summary and the required items checklist.
b. Please specify source of wetland plants on plan sheet C7.11.
c. Please specify permeability of clay liner on site plans. (Typical infiltration rate is 0.01 in/hr).
d. The percentages of total wetland surface area allotted to the shallow land and shallow water
areas as indicated on Site plans C3.3 and C3.4 do not seem to conform to those indicated in
the supporting design calculations. The shallow water seems to be far greater than 40%
(>50%) while that of the shallow land seems to be far less than 40%. Please apportion surface
areas at the permanent pool level to all zones. You may want to increase the shallow land
area.
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]ntemet: http://h2o.enr.state.nc.us/ncwetlands
Nose Carolina
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An Equal OpportunitylAffirmativeAaion Employer - 50% Recycled110% Post Consumer Paper

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E-27 Fuquay Elementary School
Page 2 of 2
February 15, 2008
da s of the date of this letter by sending two (2) copies of the above
Please respond within five (5) py rocess that requires all parties to participate in a
information in writing. The Ex ress Review Program is a p
timely manner.
onl addresses the application review and does not authorize any impalication are not waters
This letter y
or protected buffers. Please be aware that any impacts requested within your ap
authorized (at this time) by the DWQ•
ott at 919-733-1786 if you have any questions regarding or
Please contact Joseph Gyamfi or Lia My
would like to set up a meeting to discuss this matter.
Sincerely,
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/jg
cc: James Shern, USACE Raleigh Regulatory Field Office
Lauren Witherspoon, DWQ Raleigh Regional Office
File Copy
Soil & Environmental Consultants, PA, 11010 Raven Ridge Rd, Raleigh, NC 2761
Central Files
James Dasher,