ML20209F269
| ML20209F269 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 06/09/1986 |
| From: | Haage L IOWA, STATE OF |
| To: | |
| Shared Package | |
| ML20209F234 | List: |
| References | |
| 57--1-4, 57-00-1-04, NG-86-2722, NUDOCS 8609120105 | |
| Download: ML20209F269 (9) | |
Text
Attachment 1 NG-86-2722 Pag) I af 4 Authorization From The Iowa Department Of Water, Air and Waste Management To Discharge Under The National Pollutant Discharge Elimlnation System PER54 tTTEE IDENTITY AND LOCATION OF FACILITY lova Electric Light & Power Company RECElVED P.O. Box 351 DuANE ARNot0 ENERay CENTER 3277 DAEC ROAD Cedar Rapids, Iowa 52406 M 1 g jo$$
Palo, leva 52324 i
.i(
l.E.L.P CO.
Sect ton 9 and 10, T84N, R8W
\\ PRODUCTION Linn County, Iowa OEpr
/
IOWA NPOES PERMIT NUMBER 57-00-1-04 RECEIVING WATERCOURSE CLAS$lFICATION Cedar River DATE OF ISSUANCE gg jggg DATE OF EXPlRATION June I,1991 THE CLASSIFIED STREAM IS Cedar River from YOU ARE REQUIRED TO FILE RENEWAL OF mouth (Loulsa County) to Highway 30 (Sect ton THl$ PERMIT BY December 1,1990 9, T82N, R6W, Linn County), which Is classified A & B(w). Classes "Aa & "Ba waters are to be protected for wildlife, fish, EPA NUMBER - IA0003727 aquatic and samlaoustic ilfe and primary contact water uses.
This permit is issued pursuant to the authority of section 402(bl of the Clean Water Act (33 U.S.C.1342(
Iowa Code section 4558.174, and ru le 900-64.3, towa Administrative Code.
disposal system and to dfscharge the pollutants spectfled You are authorized to operate the in thIs permit in accordance with the of fluent Ilmi-tations, monitoring requirements and other terms set forth In this permit.
You may appeal any conditions of this permit by filing a written notice of appeal and request for administr tIve hearing with the executive director of this Department within 30 days of your receipt of this permit a-Any outstIng, unexpired Iowa operation permit or towa NPOES permit previously Issued by the Department for the facility Identif f ed above Is revoked by the issuance of thIs towa NPDES operation permit unless the f acility Is being upgraded or replaced by a new f acility, then the existing permit will remain In ef fect until the new facility is completed and in operation.
OUTFALL 3
DESCRIPil0N 001 Discharge of cooling tower blowdown f rom the recirculating water system.
002 DIschirge from the extended aeratlon treatment plant used to treat domestic wastewater.
HS i p la/86-92.03 8609120105 860022 PDR ADOCK 00000331 p
w Pags 2 cf 4 Facility Name:
leva Electric Light & Powtr Company /Duane Arnold Energy Center lova NPDES Permit Number 57-00-1-04 EFFLUENT LIMITATIONS You are prohibited from discharging pollutants more frequently or in excess of the limitations specified below:
OUTFALL MASS IN POUNDS PER DAY S ERI AL WASTEWATER PARN4ETER CONCENTRATION IN mg/l NUMBER (unless otherwise specified)
(unless otherwise specified)
Averane l Mawlmum Averace l Mawlmum 00I
^**'"I' I II"'
0 2 mg/l/two (2) hours / day / unit Average O.5 mo/l two (2) hours / day / unit varimum Neither free available chlorine nor total residual chlorine may be discharged fr more than two hours in any one day and not more than one unit In any plant may discha om any unit for available chlorine or total residual chlorine at any one time.
e Chromium, Total' Not to exceed 0.2 mg/l Zinc, lotale Not +o exceed 1 mg/l pH 6 0 Minimum - 9.0 Mawlmum Temperature May not violata lowa Water Quality Standards for Class
.ea warm waters.
Flow 8.02 MGD Average - 10.02 NGO Maximum 0D$
002 13 19 30 45 Total Suspended Solids 13 19 30 45 pH 6.0 Minimum - 9.0 Maximum Flow 0.05 MGD Average - 9.0 Maximum Disinfection is required from April 1 to October 31.
- Limitations for these parameters shall apply to the cooling tower blo d other waste streams.
w own prior to mixing with l
DEF INITIONS l
1.
"Wawlmum a means the total discharge by mass, volume or concentration which cannot twenty-four hour period.
be exceeded during a 2.
" Average" means the sum of the total dally discharges by mass, volume or concentration dur reporting ;eriod divided by the total number of days durb.g ibe recort ing period when the facility e
operat ion, and daily discharges by mass, volume or concentration and dividing was in e
period when the measurements were made.
reporilng MS i g la/86-92.04 i
l l
Paga 3 of 4 Facility Nam:
Imus Electric Light & Porir CompIny/Du:no Arnold Ensrgy Ccnttr luo NPDES P;rmit Numb:r 57-0 >1-04 MONIT0llNG AND REPORTING RECUlREMENTS (a)
Samoles and measurements taken shall be representative of the volume and nature of the monitored waste-.
water.
( b)
" Standard Methods", " EPA Methods", or "ASTP, as defined In rule 60.2, or other analytical and sampling methods as speelfled in Table Vil of Chapter 63 of the rules, or other methods approved in writing by the Department, shall be utilized.
(c) Table ll, til & V of Chapter 63 of the rules provides you with further explanation of your monitoring requirements.
(d) Bypasses shall be reported in accordance with rule 63 5.
(e) You are required to monitor your wastewater as speelfled below. Results of all monitoring shall be re-corded on forms provided by the Department, and submitted to the Department by the fif teenth day follow ing the close of the reporting period. Your report ing period is on a monthly basis, ending on the last day of each month.
nASTEnATER PARAuETER FREQUENCY SAMPLE TYPE SAMPLim LOCATION Flow Daily 24-hour Total 1 and 2 or 3 1/ week grab 1, 4 1/ month gras 3
Daily gran 1
Temperature 1/ month grab 3
t/ week grab 4
" Free Ava66able
._ Chlorine 1/2 weeks grab I
Chromium, Total 1/ month grab
=J Zinc, Total 1/ month grab 5
lurat ion or Chlorination Dally monthly report
" loral desidual Chlorine 1/ week grab 3
Fecal Collform 1/3 months grab 3
800 5
1/ month 24-hour Comp.
3
[
_o$,'"'##*#
1/3 months 24-hour Comp.
3 Settleable Sollds 1/ week grab 3
MLSS 1/ week grab 4
Dissolved Oxygen 1/ week grab 4
W inut9 Sattiaability 1/ week grab 4
Samoles collected in comollance with the monitoring reautrements speeltled above shall be obtaines at the I
tollowing designated locarlons:
i Sampling to occur during period of chlorine addition.
1.
Outtall 001 prior to the receiving stream.
2.
Raw wastewater influe97 to domestle waste treat *ent olant.
3.
Final ettluent f rom TSe ortended aeration wastewater treatment plant and prior to disenarge to the Cedar River.
4 Aeration basin contents.
S.
Cooling tower blowdown prior to mixing with other waste streams.
t
$45:pla/86-92.05
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GENERAL CCNDITIONS f
DEFlNITICNS pyg3 4 g, 4 j'y*
I.
' Maximum" means th3 tctil dischtrg3 by mass, volume or conc ntration which cannot b hiur period.
e exceeded during a twenty-fc
" Average
- means the sum of the total dally discharges by mass period, divided by the total number of days during the reporting period when the facility was in o, vo to be calculated in connection with volume or concentration and dividing by the number of days during the reporti peration, and made.
2.
NOTICE OF CHANGED CONDITICNS wer You are reculced to report any changes in existing conditions or Information on which this per it i (a) discharoes of pollutants must be reported to the executive director in ad m
s based.
in new or increased effluent limitations, your report must include a new application for NPCES permit.If such discharges exceed (b)
If any modification of, addition to, or construction of a disposal system is to be made(See rule 64.6(5)"
a written permit from this department, Bypasses shall be reported in accordance with rule 63.5.in accordance with rule 64.2.
, you must first obt (c)
(d)
If your facility is a publicly owned treatment works or otherwise may accept waste for treatment clal or Industrial contributors, see CONDITIONS, LIMITATIONS AND MONITORING REQU comme CorwERCIAL/lNDUSTRIAL USERS for further notice requirements.
3 PERMIT MODIFICATION, SUSPENSICN OR REVOCATION ISee rule 64.3(5)!
(a)
This permit may be modified, suspended or revoked for causes specified in rule 64 3(11)
(b)
This permit may be modified due to changed conditions or Inform (c) established under section 307(a) new standards. (See rule 64.6(5)"Q".)of the Clean water Act, this permit will be modified in accordance with th.
4 INSPECTION OF PREMISES, RECORDS, EOUlPMENT, METHODS AND DISCHARGES You are reouired to permit authorl2ed department personnel to inspect in accordance with rule 64 5(5 5.
OPERATION AND MAINTENANCE c.
All facilities and control systems shall be operated as ef ficiently as possible and maintained in order, in accordance with rule 64.6(5)"f", and a suf ficient number of staf f, adeouately traine ood working in the operation of your f acility shall be retained to achieve compilance with th 6
NEED TO HALT OR REOUCE NOT A DEFENSE e terms of this permit.'
reduce the permitted activity in order to maintain compilance with the 7
TRANSFER OF TITLE If title to your f acility or any part of it is transferred, the new owner shall be subject to this per required to notify the new owner of the requirements of this permit in writino pelor to such transfer mit. You a The executive director shall be notified in writing of such transfer within 30 days.
8 SEVERABILITY (See rule 64.13.)
The provisions of this permit are severable, and if any provision or application of any provisio circumstances, is found to be invalid by this department or a court of law, tne application of s other circumstances, and the remainder of this permit, shall not be af fected by such 9
APPLICATION CF OTHER AUTHORITY findino.
ordinances, regulations or other legal requirements applying to the op 10.
ADMINISTRATIVE RULES 900 of the Iowa Administrative Code in Chapters 60 - 64 Rules of this department whic e
n par designated prowlsion of Part 900 lowa Administrative Code, Reference to the term " rule" In this permit means the 11.
DUTY TO MITIGATE which has a reasonable likellhood of adverselv ef fecting human health or the 12.
m MAINTENANCE OF RECORDS AND SIGNATORY RECutREMENTS You are required to maintain records of your operation in accordance with rule 63.2.
reports, or Information submitted to the Department shall be signed and certlfled.
Also all applications, 13.
CHANGES IN DISCHARGES OF T0XIC SUBSTANCES (See rule 63.10 & 64.3(811 The permittees shall notify the Olrector as soon as they know or have reason to believe:
a)
That any activity has occurred or will occur which would result is not limited in the permit. (See 40 CFR 122.42(a)).
in the discharge of any toxic pollutant which b) any toxic pollutant which was not reported in the permit application.That they hav o uc Y u may appeal any conditions of this permit by filing a written notice of appeal and reauest for adelnist ulth the executive director of this Department within 30 days of your receipt of this permit.
rative hearti D:partment of Water, Air and Waste Management for extra report Contact the towa Information at the Wallace Building, 900 E. Grand Ave., Des Moines, Iowa 50319, or phoneforms, tional 515/281-e693 FOR THE DEPARTMENT OF WATER, AIR AND WASTE MANAGEMENT St: phen W. Ballou, Executiva Of rector
,/
- By __-
/2 n'4 M-cW M ---
Lavoy Adace, chief or maste aze,r'Fermits eranen ProgramOperat/ensDivis D ISTRlDUTION I - County Sanitarian 1 - EPA, Region vil 1 - Roolon 1
1 - Records Center 1 - Wastewater Permits Branch 1 - Permittee O l SX22--NJR:p le/00-00.15 S
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NG-86-2722 Ij1 l Jl lowa Electric Light and Rwer Company July 1, 1986 Mr. Lavoy Haage Chief, Wastewater Permits Branch Program Operation Division Iowa Department of Water, Air and Waste Management Henry A. Wallace Building 900 East Grand Avenue Des Moines, IA 50319 Re:
National Pollutant Discharge Elimination System (NPDES Permit 57-00-1-04 for the Duane Arnold Energy Center)
Dear Lavoy:
Thank you for renewal of the NPDES permit.
We received our copy of the renewal June 10, 1986.
As you know from our conversation, we seek a change in the permit as issued.
The change we seek would allow dis-charge of cooling tower blowdown for more than two (2) hours per day.
The two-hour limitation imposed by the permit as issued, is designed to control the discharge of chlorine.
This limitation is not necessary in this instance because chlorine discharges from blowdown at this facility are miniscule.
In fact, chlorine is typically not detected in the blowdown discharge from Duane Arnold, and when it is we do not allow blowdown discharge until the chlorine has dissipated to less than detectable concentrations.
Our analysis is able to reliably detect chlorine concentrations as low as 0.05 milligrams per liter.
For these reasons the chlorine concentration reaching the river is essentially zero.
Allowing the discharge over the more extended period of time will not be against the intent of federal standards as set out in 40 CPR Part 423.
This section clearly intends to limi't quantitics of chlorine and not the duration of discharge.
l Generial Office
- lu %,1331
- Cedar ILuphis, lawse 32406
- 319/396-4411
/*
- r. Lnvoy H2rga July 1, 1986 P ga 2 We would be agreeable to either a two (2) hour a day discharge time limit when there is detectable quantities of chlorine, or a total poundage limit equivalent to that of the permit.
The DAEC plant staff is planning to change its operating instruction and procedure to protect against chlorine dis-charges that would exceed the.2 average and.5 maximum.
As the permit renewal requires, we are taking the necessary steps to put in a twenty-four (24) hour composite sampling system for influent and effluent of the sewage treatment plant.
The system will replace our present grab sampling procedure.
Since this is a budget item, we antic-ipate that this new system will be in place next year.
Finally, as per our discussions, we will test for chromium and zinc in discharge for three (3) months to demonstrate that these metals are not present.
Please call me (319) 398-4180 if you have questions.
We hope to hear from you soon regarding these items.
Sincerely, L-Y P. McPartland Environmental Coordinator
/ps cc:
S.
Tuthill T.
Pitner/J. Ryan R. McGaughy D. Mineck II. Giorgio W.
Keith K.
Young
NG-86-2722 1
E/
department of water, air and waste management July 14, 1986 RECEIVED' Mr. J.P. McPartland MI Environmental Coordinator Iowa Electric Light and Power Co.
1.E.LP Co.
P.O. Box 351 "R *C " +
Cedar Rapids, IA 52406 C/
RE: NPDES Permit No. 57-00-1-04 Duane Arnold Energy Center
Dear Mr. McPartland:
I've reviewed your request of July 1,1986 for a change in chlorine limitations to allow cooling tower blowdown discharges for more than two (2) hours per day.
I think the problem we have with this restriction is one of interpretation of the intent of the federal standards rather than one of actual operations at the Duane Arnold Energy Center.
As you know, 40 CFR Part 423.13, in addition to limiting the discharge concentration (or mass) of chlorine, also says that "neither free available nor total residual chlorine may be discharged from any unit for more than two hours in any one day..."
I don't believe EPA intended to restrict the duration of cooling tower blowdown discharges only the duration of chlorine discharge to the river.
If, as stated in your letter, chlorine is typically not detected in the blowdown discharge from Duane Arnold, and when it is, you do not allow blow down dis-charge until the chlorine has dissipated to less than detectable concentrations you would be in compliance with the two hour per day restriction.
If concentra-tions are at less than detectable levels, we would assume no chlorine was being discharged since we could not prove otherwise.
I quickly reviewed EPA's Development Document that was used to develop the stan-dards in hopes of finding the rationale that went into this requirement.
It seems that the basic philosophy was to move facilities away from continuous chlorination of cooling towers in favor of " shock chlorination."
In other words, EPA felt that the blowdown valve could be closed during chlorine addition and reopened when the natural chlorine demand reduced concentrations to less than detectible levels.
This appears to be the method of operation at Duane Arnold.
Therefore, I don't believe any changes in cooling tower operation are needed and that you are in compliance with the regulations.
I suggest that we leave the permit, as written, for the time being.
If the need arises to clarify this requirement in the permit because of confusion or misinter-pretation by EPA or DNR field staff, we can try to revise the language at that
- time, honry a walloco budding
- 900 oost grand
- dos moinos,iowo 50319
- 515/2818690
~
Mr. J.P. McPartland Iowa Electric Light and Power Co.
Cedar Rapids, Iowa July 14, 1986 Page 2 Please contact me at 515/281-8884 if you wish to discuss this further.
Sincerely, ENVIRONMENTAL PROTECTION DIVISION dWM Steven N. Williams Environmental Specialist Wastewater Permits Section SNil: bib cc:
Field Office No.1 - Manchester
s n
NG-86-2722 l
SUMMARY
OF CHANGES OUTFALL PARAMETER NEW PERMIT REQUIREMENT OLD PERMIT REQUIREMENT 001 Free Available 0.2 mg/l/2 hrs / day avg.
- Total Residual Chlorine (Cooling Chlorine 0.5 mg/l/2 hrs / day max.
- Limited to 0.14 mg/l max.
Tower
- No Time Restrictions on Blowdown)
Chlorine Discharge 001 Chromium, Total Not to exceed 0.2 mg/l No Requirement Zinc, Total Not to exceed 1 mg/l (DAEC does not use)
Grab Sample, 1/ month 002 Flow 9.0 MGD 0.08 MGD (Sewage Treatment) 002 Temperature 1/ month - Effluent No Requirement 1/ week - Aeration Basin 002 pH 1/ week - Aeration Basin No Requirenent 002 BOD 24-hr Composite Sample, Grab Sample, 1/ month - Effluent 1/ month - Effluent 002 T.S.S.
24-hr Composite Sample, Grab Sample, 1/3 months - Effluent 1/ week - Effluent 002 Settleable Grab Sample, No Requirement Solids 1/ week - Effluent 002 MLSS Grab Sample, No Requirement 1/ week -
Aeration Basin 002 Dissolved Grab Sample, Grab Sample, Oxygen 1/ week -
1/ week -
Aeration Basin Effluent & Aeration Basin 002 5-Minute Grab Sample, No Requirement Settleability 1/ week -
Aeration Basin