20080146 Ver 1_More Info Received_20080125

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ENGINEERING DEPARTMENT
January 24, 2008
DWQ Wetlands Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
Attn: Cyndi Karoli and Richard Jones
Re: NC DWQ PCN Submittal - Summerwinds Water and Sewer Extension Project
Dear Ms. Karoli and Mr. Jones,
Please find the original and six copies of the corrected sheets 11 and 12 of the PCN
submittal for the Summerwinds Water and Sewer Extension Project enclosed. I have
forwarded one copy of this to the USACOE.
If you have any questions or need any other information concerning this project,
please contact me at 919-469-4335 or at iarrod.buchanan(a~townofcary.org.
Sincerely,
c~ ! ~ _~-_.._-~
Jarrod A. Buchanan, P.E.
Project Manager
Enclosures
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JAN 2 5 2008
DENR - WATEk QUAUIY
VY~TLANDS AND STORMWATEk BRF\Nrii
R:\EngineeringDeptIPROJECTS (Capital)\Sewer1SW5005 - Summerwinds 182 - Jarrod\Creek Crossing\DWQ PCN Cover Letter-2.doc
TOWN Of CARY
316 North Academy Street •Cary, NC 27513•PO Box 8005•Cary, NC 27512-8005
tel [phone] • fax [phone]• www.townofcary.oxg

2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ^ No
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ^ No ^ N/A
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? Yes ® No ^
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multi Tiers.
Zone* Impact
(square feet) Multiplier Required
Mitigation
1 1,318 3 (2 for Catawba) 0
2 406+1089 = 1,495 1.5 0
Total 2,574 0
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 15A NCAC 2B .0242 or .0244, or .0260. Buffer mitigation not required as
considered allowable use per Meuse buffer rule NC0233.
XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss.
stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level. No new impervious acreage is proposed. Silt
Page 11 of 12

fence will be installed along the construction corridor and rock check dams will be installed
along the downstream edge of the construction corridor.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
This waste water will flow to the South Carv WWTP. The plant rated at 12.8 mgd with over 5
mgd of excess capacity, has more than enough excess capacity to cover the additional 15 680
gallons per day proposed under this project. The plant discharges into Middle Creek and uses
the following_processes to treat the influent flow• bar screens grit removal facilities three
aeration basins, four secondary clarifiers, seven deep-bed tertiary filters untraviolet disinfection
and a cascade aerator for reaeration prior to discharge.
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ^ No
Is this an after-the-fact permit application? Yes ^ No
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ^ No
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description:
The neighborhood is approximately 25-30 years old. The majority of the surrounding usable
land has homes already located on it.
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
The Town of Carv is installingproject at its earliest convenience for two reasons. First
several of the properties have failing septic systems which are an environmental concern.
Page 12 of 12
(Agent's signature is valid only if an authorization letter from the applicant is provided.)