NC0020354_Authorization to Construct_20090603 (2)

NPDES DOCIMENT !;CANNING COVER SHEET
NPDES Permit:
NC0020354
Pittsboro WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC) j;`
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Technical Correction
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
June 3, 2009
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ern
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Govemor Director Secretary
June 3, 2009
Mr. William Terry, Town Manager
Town of Pittsboro
Post Office Box 759
Pittsboro, North Carolina 27312
SUBJECT: Authorization to Construct
A to C No. 020354A02
Town of Pittsboro
WWTP Wet Weather Flow Improvements
Chatham County
Dear Mr. Terry:
A letter of request for an Authorization to Construct was received on May 14, 2009, by
the Division of Water Quality (Division), and final plans and specifications for the subject
project have been reviewed and found to be satisfactory. Authorization is hereby granted for the
construction of modifications to the existing 0.75 MGD Wastewater Treatment Plant, with
discharge of treated wastewater into the Roberson Creek in the Cape Fear River Basin.
Please note that if the Town of Pittsboro applies, or has applied, for funding through the
American Recovery and Reinvestment Act (ARRA) of 2009 and receives a successful priority
rating score, an engineering report must also be submitted for our review and approval. Based
on our review, the approved engineering report may limit ARRA funding eligibility to a
particular size for the proposed flow equalization basin.
This authorization results in no increase in design or permitted capacity and is awarded
for the construction of the following specific modifications:
Installation of a 675,000 gallon flow equalization basin with two (2) compartments each
with a 7.5 Hp floating surface aerator; a flow equalization basin pump station with two
(2) 1,110 GPM pumps and a magnetic flow meter; a return activated sludge (RAS) pump
station consisting of three (3) 300 GPM pumps with VFDs; a UV disinfection system
with two (2) banks each rated to treat a peak flow of 1.875 MGD; replacement of a VFD
and PLC at the influent pump station; and a standby diesel generator with automatic
transfer switch, in conformity with the project plans, specifications, and other supporting
data subsequently filed and approved by the Department of Environment and Natural
Resources.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748
Internet www.ncwaterquality.org
An Equal opportunity 1 Affirmative Action Employer
None hCarolina
7V'aturallij

Mr. William Terry, Town Manager
June 3, 2009
Page 2
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0020354 issued December 15, 2006, and shall be subject to revocation
unless the wastewater treatment facilities are constructed in accordance with the conditions and
limitations specified in Permit No. NC0020354.
The sludge generated from these treatment facilities must be disposed of in accordance
with G.S. 143-215.1 and in a manner approved by the Division.
In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those as may
be required by this Division, such as the construction of additional or replacement wastewater
treatment or disposal facilities.
The Raleigh Regional Office, telephone number [phone], shall be notified at least
forty-eight (48) hours in advance of operation of the installed facilities so that an on site
inspection can be made. Such notification to the regional supervisor shall be made during the
normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State
Holidays.
Upon completion of construction and prior to operation of this permitted facility, a
certification must be received from a professional engineer certifying that the permitted facility
has been installed in accordance with the NPDES Permit, this Authorization to Construct and the
approved plans and specifications. Mail the Certification to: Construction Grants & Loans,
DWQ/DENR, 1633 Mail Service Center, Raleigh, NC 27699-1633.
Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of the
wastewater treatment facilities. The operator must hold a certificate of the type and grade at
least equivalent to or greater than the classification assigned to the wastewater treatment
facilities by the Certification Commission.
The Permittee must also employ a certified back-up operator of the appropriate type and
grade to comply with the conditions of T15A:8G.0202. The ORC of the facility must visit each
Class I facility at least weekly and each Class II, III and IV facility at least daily, excluding
weekends and holidays, must properly manage the facility, must document daily operation and
maintenance of the facility, and must comply with all other conditions of T15A:8G.0202.
A copy of the approved plans and specifications shall be maintained on file by the
Permittee for the life of the facility.
During the construction of the proposed additions/modifications, the permittee shall
continue to properly maintain and operate the existing wastewater treatment facilities at all times,
and in such a manner, as necessary to comply with the effluent limits specified in the NPDES
Permit.

Mr. William Terry, Town Manager
June 3, 2009
Page 3
You are reminded that it is mandatory for the project to be constructed in accordance
with the North Carolina Sedimentation Pollution Control Act, and when applicable, the North
Carolina Dam Safety Act. In addition, the specifications must clearly state what the contractor's
responsibilities shall be in complying with these Acts.
Prior to entering into any contract(s) for construction, the recipient must have obtained all
applicable permits from the State.
Failure to abide by the requirements contained in this Authorization to Construct may
subject the Permittee to an enforcement action by the Division in accordance with North
Carolina General Statute 143-215.6A to 143-215.6C.
The issuance of this Authorization to Construct does not preclude the Permittee from
complying with any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
One (1) set of approved plans and specifications is being forwarded to you in a separate
transmittal. If you have any questions or need additional information, please contact Seth
Robertson, P.E. at telephone number [phone].
Sincerely,
Coleen H. Sullins
st:sr
cc: John Eick, P.E. — Stearns & Wheler, PLLC, 3128 Highwood Blvd, Suite 140,
Raleigh, North Carolina 27604
Chatham County Health Department
DWQ Raleigh Regional Office, Surface Water Protection
Technical Assistance and Certification Unit
Point Source Branch, NPDES Program
Steve Tsadwa, E.I.
ATC File