20091105 Ver 1_More Info Letter_20100913

AE WA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H.Sullins Dee Freeman
,overnor Director Secretary
September 13, 2010
DWQ Project# 09-1105
Lee County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Victor Czar, Public Works Director
City of Sanford=Public Works Department
Sanford Municipal Building
225 E. Weatherspoon Street
Sanford, NC 27330
Subject Property: Big Buffalo Creek WWTP Expansion
Ut to Big Buffalo Creek [030611, 17-40, C]
REQUEST FOR MORE INFORMATION
Dear Mr. Czar:
On October 16, 2009,the Division of Water Quality(DWQ)received your application dated October 15,
2009, with additional information received from you on October 22,2009,November 5,2009,August 9,
2010. to fill or impact 132 linear feet of perennial stream and 213 linear feet of intermittent stream to
develop the proposed Big Buffalo Creek Waste Water Treatment Plant expansion at the site. The DWQ
has determined that your application was 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 place this project on hold as incomplete until we receive
this additional information. If we do not receive the requested information,your project will be formally
returned as incomplete. Please provide the following information so that we may continue to review your
project.
Additional Information Requested:
1. Please provide SMP-1 on a full-sized, correctly scaled plan sheet. SMP-1 references Notes 6-8;
however,these do not appear on the plan sheets.
2. On the SMP sheets, please show all stormwater inlets, outlets and conveyances. The grading for
any new or proposed vegetated swales should be shown.
3. Please provide calculations for 10-year storm velocities in all newly proposed stormwater swales.
In addition, please provide calculations for 10-year storm velocities in any existing swales that
will receive additional stormwater as a result of the plant expansion.
4. Planting plans for the bioretention cells do not include the items listed in Item 5 of the Required
Items Checklist.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center,Raleigh,North Carolina 27699-1650
Location 2321 Crabtree Blvd.,Suite 250,Raleigh,North Carolina 27604
Phone [phone] FAX:[phone]
nternet http:!!portal ncdenr.org/web/wq/ws
An Equal opportunity 1 Affirmative Action Employer

City of Sanford—Public Works Department
Page 2 of 2
September 13,2010
5. A construction sequence is not provided on sheet D-1 as stated.
6. In the submittal,the supporting information for Bioretention Area A is placed with the
supplement form for Bioretention Area B and vice-versa. Also,the plan sheets do not use
consistent terminology when referencing the bioretention areas. Please provide an updated
version of Appendix A that corrects these issues.
7. Please provide specifications for the size and placement of underdrain orifices as well as for the
slope of the underdrain pipes.
8. The dimensions for the bioretention cells given in the supplement forms do not appear to match
the dimensions shown on the plan sheets. The dimensions of the cell are equivalent to the
dimensions of the bottom of the cell. Please correct these errors.
9. Please sign and seal all plan sheets.
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 Mr. Ian McMillan or Ms. Amy Chapman at 919-733-1786 if you have
any questions regarding or would like to set up a meeting to discuss this matter.
Sinc y,
Ian McMillan,Acting Supervisor
401 Oversight/Express Review Permitting Unit
IJM
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
L. Michael Santowasso, Hazen and Sawyer, PC, 4011 WestChase Boulevard, Suite 500, Raleigh,
NC 27607
Filename: 091105BigBuffaloCreekW WTP_Expa nsion(Lee)On_H old 4

■ Complete items 1,2,and 3.Also complete A. Signature r
item 4 if Restricted Delivery is desired. ❑Agent
X
■ Print your name and address on the reverse ❑Addressee
so that we can return the card to you. Er Received by(Printed Name) C. Date of Delivery
■ Attach this card to the back of the mailpiece, r r
or on the front if space permits. j0--/'(//,)0 1,117
D. Is delivery address d
iYes
t. Article Addressed to: If YES,enter deliveNo
TY OF
LIC WORKS
VIICTOR CZAR-PW DIRECTOR 9/14/10 f
225 E WEATHERSPOON ST 1
SANFORD NC 27330 3. service Type
DWQ 09-1105 LEE COUNTY -%�Certified Mail ❑ ExAU-Mail
❑ Registered -QRetum Receipt for Merchandise
❑Insured Mail ❑C.O.D.
4. Restricted Delivery?(Extra Fee) ❑Yes
2. Article Number
(Transfer from service label) 7009 2820 0004 4137 1196
PS Form 3811,February 2004 Domestic Return Receipt 102595-02-M-1e40

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NC DENR - DWQ
401 OVERSIGHT/EXPRESS UNIT
2321 CRABTREE BLVD STE 250
RALEIGH NC 27604
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