NC0004979_ATC for WWTS ATC_20090219

ALLEN STEAM STATION ATC FOR WWTS ATC #004979AO2
HE C
Subject: ALLEN STEAM STATION ATC FOR WWTS ATC #004979AO2 FEB.
From: "Wylie, Robert R" <[e-mail]>
D~~~ ^"~ ^'^°"~,"'^^'3^^^-"5°"
To: Ken Pohlig <[e-mail]>,''Miubael.Parker@ocmaiLuet"<Miubael.�����mail'uet>|�)4mc���
Ken and Mike,
Attached as required by the subject ATC are the PE certifications that the new wastewater treatment system
put in to treat the wastewater to be generated by the Hue Gas Desulfurization (FGD) process has been built
according to the design and specifications.
One of the attachments is primarily for the treatment system and its various components. That was certified
bxMr. Dean Steinbach aProfessional Engineer vyithSienoens Water Technologies (mhichbouehtUSFilter).
The other attachment covers the discharge piping tothe ash basin. This was certified bvMs. Jennifer
McCartney aProfessional Engineer with Shaw.
As discussed with Ken due to other construction activities the discharge pipe had to be routed in a different
path incomparison tothe initial design. However, itstill reaches the same end point and has been successfully
functionally tested with service water.
The FGD system is scheduled tobegin operation onFebruary 22, 2009. It is anticipated that it will beafew
weeks before the wastewater treatment system will begin. Right now it is projected that the WVTSwill go
into operation the week of March 9, 2009 with the first discharge to the ash basin occurring the week of March
17,2009.
Ifyou have any questions orneed additional information please contact me.
Robert Wylie
Water Management
Environmental, Health and Safety
Office Phone umber . 3824669
Cell Phone Number ................ (7O4)S82-82G@
Fax Number .......................... (7O4)@82'024D
Mail Code: EC13K
^ ' '
Duke Energy Allen Steam
Content-Descri. !
Station ATC for FGD
� -
�Duke Energy AllSteam Allen ATC FGD ^ WWTS.pdf
j 'Content -Type: upplicudou/pdf
'
1 / huoe64
1 of 2 2/19/2009 2:14 PM

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
December 15, 2006
Mr. Robert Wylie
Duke Power
526 South Church Street
Charlotte, NC 28202
SUBJECT: Authorization to Construct No. 004979A02
Allen Steam Station
Flue Gas Desulfurization Wastewater Treatment System
Gaston County
Dear Mr. Wylie:
A letter of request for Authorization to Construct was received September 18, 2006, by
the 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 the Flue Gas
Desulfurization (FGD) Wastewater Treatment System. Upon completion of the construction of
the FGD Wastewater Treatment System, the treated effluent from the FGD Wastewater
Treatment System (Internal Outfall 005) will discharge into the Ash Settling Basin (Internal
Outfall 002), which discharges to Catawba River (Outfall 003) in the Catawba River Basin.
This authorization results in a design and permitted capacity of 0.864 MGD, and is
awarded for the construction of the following specific modifications:
Installation of a 0.577 MGD Flue Gas Desulfurization (FGD) Wastewater Treatment
Plant, consisting of a 177,120 gallon maintenance tank; a 177,120 gallon equalization
tank; dual 640 gpm forwarding pumps; reaction tank #1 (44,280 gallons) for the addition
of lime (to raise the pH to 9.2), including a lime slurry feed system consisting of a 8,000
ft3 lime silo, a 700 gallon lime slurry tank, and dual 70 gpm lime slurry feed pumps;
reaction tank #2 (9,580 gallons) for the addition of sulfide, including a sulfide feed
system consisting of dual 400 gallon tanks and dual 8 gph feed pumps; reaction tank #3
(9,480 gallons) for the addition of ferric chloride, including a ferric chloride feed system
consisting of a 7,190 gallon tank and dual 8 gph feed pumps; a flow splitter box;
injection of polymer (just prior to the clarifiers) and a polymer feed system consisting of
dual 400 gallon tanks and dual 0.4 gph feed pumps; two 40 -foot diameter, 28 -foot side -
water depth clarifiers; a static mixer for the addition of hydrochloric acid (to lower the
pH to 8.0); a hydrochloric acid feed system consisting of a 7,190 gallon storage tank and
dual 8 gph feed pumps; three continuous backwashing, 8.33 -foot diameter gravity sand
filters; a 7,140 gallon storage tank (selenium reduction feed tank); dual 495 gpm bio-
reactor feed pumps; dual heat exchangers (to reduce the water temperature from 133° F to
95° F); a static mixer for the addition of a molasses based nutrient; a molasses based
Noe Carolina
durally
North Carolina Division of `Nater Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: Nww.ncwaterguality.org 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

Mr. Robert Wylie
December 15, 2006
Page 2
nutrient feed system consisting of a 7,190 gallon storage tank and three 26 gph feed
pumps; first stage selenium reduction bio -reactor (converting Se(IV) and Se(VI) to
elemental selenium Se(0)) consisting of six (6) parallel 18'x 20'x 26'cells filled with 14.3
feet (depth) of activated carbon; dual 106,290 gallon first stage effluent transfer
compartments (tanks) with three (3) 495 gpm transfer/recycle pumps and dual 3,600 gpm
backwash pumps; a second static mixer for the addition of a molasses based nutrient;
second stage selenium reduction bio -reactor (converting Se(IV) and Se(VI) to elemental
selenium Se(0)) consisting six (6) parallel 18'x 20'x 26'cells filled with 14.3 feet (depth)
of activated carbon; a 9,990 gallon second stage recycle tank with dual 495 gpm
recycle/recirculation pumps; dual 13,960 gallon effluent tanks and dual 1,200 gpm
effluent pumps; approximately 8,200 linear feet of 14 -inch forcemain to the ash basin;
dual 99,770 gallon backwash holding compartments (tanks) with dual 70 gpm backwash
waste return pumps; a sludge treatment system consisting of six (clarifier) 125 gpm
sludge transfer pumps, a 177,120 gallon sludge holding tank, three 550 gpm filter press
fast fill pumps, six 70 gpm filter press pressurization pumps, three (3) 1.5 meter, 250 ft3
filter presses, three (3) sludge truck loading stations, and a 31,800 gallon filtrate sump
pump station with dual 600 gpm filtrate sump pumps; associated yard piping, access
roads and site work, in conformity with the project plan, specifications, and other
supporting data subsequently filed and approved by the Department of Environment and
Natural Resources.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0004979 issued September 11, 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. NC0004979. '
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 North Carolina Division of Water Quality.
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 Mooresville 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 Cecil G. Madden, Jr., P.E.,
Construction Grants & Loans, DWQ / DENR, 1633 Mail Service Center, Raleigh, NC 27699-
1633.

Mr. Robert Wylie
December 15, 2006
Page 3
Upon classification of the wastewater treatment facilities by the Water Pollution Control
System Operators Certification Commission (WPCSOCC), the Permittee shall designate and
employ a certified operator to be in responsible charge (ORC) and one or more certified
operator(s) to be back-up ORC(s) of the facilities in accordance with 15A NCAC 8G .0201. The
ORC shall visit the facilities in accordance with 15A NCAC 8G.0204 or as specified in this
permit and shall comply with all other conditions specified in these rules.
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.
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 of Water Quality 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.

AL
Mr. Robert Wylie
December 15, 2006
Page 4
One (1) set of approved plans and specifications is being forwarded to you. If you have
any questions or need additional information, please contact Cecil G. Madden, Jr., P.E. at
telephone number [phone].
r
�r
W!!!!lIMMMMMM���CC�i�CC. Klimek, P
kp:cgm
cc: Raymond Luciana, P.E., US Filter, Warrendale, PA
Gaston County Health Department
DWQ Mooresville Regional Office, Surface Water Protection
Technical Assistance and Certification Unit
Daniel Blaisdell, P.E.
Point Source Branch, NPDES Program
Cecil G. Madden, Jr., P.E.
Ken Pohlig, P.E.
ATC File

4