20061223 Ver 2_More Info Letter_20061207

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O~ WAT~'T Michael F. Easley, Governor
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`Q (~ William G. Ross Jr., Secretary
Uj Ste` North Carolina Department of Environment and Natural Resources
~ ~yA;~zi~. ~ Alan W. Klimek, P.E. Director
~ ~ ~':'~r~'~k:,~~s Division of Water Quality
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December 7, 2006
DWQ No. 06-1223 V2
Pitt County
CERTIFIED MAIL: RETiJRN RECEIPT REQUESTED
Malpass & Associates
Attn.: Jamie Midgette, EI
Engineering & Planning
2321 East Arlington Boulevard, Suite D
Greenville, North Carolina 27858
Subject Property: Brookstone Subdivision in Pitt County
REQUEST FOR REVISIONS AND ADDITIONAL INFORMATION
On October 17, 2006, the Division of Water Quality (DWQ) received your application dated September
16, 2006 to request impacts to the Neuse River stream buffers for the Brookstone Subdivision in Pitt
County. The DWQ has determined that the application will require additional information to meet the
requirements of the Neuse Buffer Rule (15A NCAC .0233).
Please provide the following information so that a Buffer Authorization may be issued:
You have provided engineered stormwater management facilities as an alternative to the
diffuse flow provisions of the Neuse Buffer Rule. However, there is a discrepancy between
the construction plans (which indicate the use of wet detention ponds) and the worksheets and
calculations (which indicate the use of extended detention wetlands). In order to meet the
nitrogen removal requirements of the Neuse Buffer Rule when level spreaders are not an
option, DWQ requires the use of either extended detention wetlands or bioretention areas.
Please submit revised plans and calculations that indicate the use of either extended detention
wetlands or bioretention areas that have been designed in accordance with the 1999 DWQ
Stormwater Best Management Practice Manual. DWQ also allows the use of wet detention
ponds that direct all discharge to a level spreader adjacent to protected buffer areas. If the
project were able to obtain local approval for a level .spreader, the wet detention ponds
combined with level spreaders would be an allowable option to DWQ to meet Neuse Buffer
Rule requirements.
2. A planting plan for the stormwater management practices with plant species and densities
must be provided.
3. A site specific, signed and notarized operation and maintenance agreement must be provided.
4. The drainage areas for each of the stormwater management facilities appear to be incorrect.
The total project area is given to be 21 acres, therefore it is not possible that the drainage area
for each of the stormwater facilities is 15.89 acres.
401 Oversight 1 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]nternet: http•I/h2o enr state nc.uslncwetlands
Noe Carolina
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~ , ,~ Brookstone Subdivision, Pitt County
Page 2 of 2
December 7, 2006
All relevant inverts for every drop inlet must be shown on the plans. Please provide
assurance that all drainage from the site is being treated by an appropriate stormwater
management practice before being discharged through the protected buffer.
Please be aware that future phases of this project that require a 401 Certification for impacts to streams,
wetlands or open waters will require one of the following stormwater management practices to meet
nutrient control requirements: extended detention wetlands, bioretention areas or wet detention ponds
with forested filter strips.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of your revised
subdivision plans to me. If we do not hear from you within three weeks, we will assume that you no
longer want to pursue this project and we will consider the project as withdrawn.
This letter only addresses the impacts to protected buffers application review and does not authorize any
impacts to wetlands or waters of the state. Please be aware that any impacts requested within your
application are not authorized (at this time) by the DWQ. Please call Ms. Amy Chapman or Ms. Annette
Lucas at 919-733-1786 if you have any questions regarding the project or would like to set up a meeting.
Sincerely, ~
Cyndi Karoly,
401 Oversight/Express Review Permitting Unit
AML/aml
cc: USACE Washington Regulatory Field Office
DWQ Washington Regional Office
File Copy
Central Files
Jonas Hill, Pitt County Planning, 1717 West Fifth Street, Crreenville, NC 27834
Tom Harwell, 102 Oakmont Drive, Crreenville, NC 27858