20070666 Ver 2_More Info Letter_20080219

~~F WAT~9 Michael F. Easley, Governor
O QG William G. Ross Jr., Secretary
~ ~, North Carolina Department of Environment and Natural Resources
~ -~ Coleen H. Sullins, Director
p `C Division of Water Quality
February 19, 2008
DWQ Project # 07-0666, Ver. 2
Wake County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Broughton Properties
P.O. Box 464
Raleigh, NC 272602
Subject Property: Oak Forest Road Extension
Ut to Perry Creek [030402, 27-25-(2), C, NSW]
REQUEST FOR MORE INFORMATION
Dear Sir or Madam:
On November 9, 2007, the Division of Water Quality (DWQ) received your application dated November
8, 2007 to impact 137 linear feet of perennial stream and 7,486 square feet of Zone 1 Neuse River basin
protected riparian buffer and 4,297 square feet of Zone 2 Neuse River basin protected riparian buffer to
construct the proposed mixed-use development at the site. On January 10, 2008, January 15, 2008, and
January 17, 2008, the DWQ received additional information from you, however, the DWQ has
determined that your application remains incomplete and/or provided inaccurate information as discussed
below. The DWQ will require additional information in order to process your application to impact
protected wetlands and/or streams on the subject property. Therefore, unless we receive five copies of the
additional information requested below, we will have to move toward denial of your application as
required by 15A NCAC 2H .0506 and will place this project on hold as incomplete until we receive this
additional information. Please provide the following information so that we may continue to review your
project.
Additional Information Requested:
Please address the following issues with the level spreader design:
a. The plan sheets show that the filter strips downslope of both proposed level spreaders
significantly exceed eight percent. The construction sequence states that the filter strip
slopes will be verified as part of the construction process. In fact, filter strip slopes must
be determined as part of the desi process. If the level spreaders cannot be re-located to
an area with appropriate filter strip slopes, then they will have to be replaced by a BMP
that removes a minimum of 85 percent TSS and 30 percent of the TN and TP from the
entire drainage area.
b. The filter strip associated with level spreader 1 is only 40 feet in width. A minimum
width of 50 feet is required.
c. The plan views of the level spreaders do not appear to comply with the DWQ BMP
Manual -the forebays appear to be located too far away from the level lips.
2. If you are able to address the above issues associated with the level spreader designs such that
they comply with the DWQ BMP Manual, then you must provide ALL of the information
N~~e Carolina
~tura!!y
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 //h2o enr state nc us/ncwetlands
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Broughton Properties
Page 2 of 2
February 19, 2008
requested in the Required Items Checklist (or your application will be returned). Your submittal
failed to provide the following items:
a. Plan details for the level spreader at 1" = 30' or larger.
b. Adate-stamped photograph of the vegetation in the filter strip.
c. The supporting calculations for the t~, which you appear to have assumed is 10 minutes
without providing documentation for this decision.
d. A~formally signed and notarized Inspection and Maintenance Agreement for the level
spreaders.
3. If another BMP is used in place of the level spreaders, then you must provide the appropriate
BMP Supplement Form (with both the Design Summary and Required Items Checklist
completely filled out) and ALL required items attached. Failure to provide the complete form
and ALL of the required items will result in a return of application.
4. If possible, please use the interactive feature on the BMP Supplement Forms to aid in your design
and our review.
5. More information will be needed before the DWQ will approve the conceptual stormwater plan.
The bioretention areas must be sized based on current assumptions about the percentage
impervious surface in each contributing drainage area. Then, these bioretention area footprints
must be shown to scale on the site plan.
Please submit this information within 30 calendar days of the date of this letter. If we do not receive this
requested information within 30 calendar days of the date of this letter, your project will be withdrawn
and you will need to reapply with a new application and a new fee.
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. Please call Ms. Cyndi Karoly or Mr. Ian McMillan at 919-733-
1786 if you have any questions regarding or would like to set up a meeting to dis u s this matter.
Si rely,
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/ijm
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
CH Engineering/Maha Chambliss, P.O. Box 30128, Raleigh, NC 27622
070666 Ver20akForestRoadExt(Wake)On_Hold