Midwest Generation EME, LLC
)
MAR i t^ 2007
Will County Generating Station
)
STATE OF ILLINOIS
Pollution Control Board
Petitioner,
)
V .
)
IEPA - 074
(Provisional Variance-Water)
ILLINOIS ENVIRONMENTAL
)
PROTECTION AGENCY,
)
Respondent .
)
Re:
Provisional Variance From Limits for Biochemical Oxygen
Demand (BOD), Total Suspended Solids (TSS), from NPDES
Permit IL0002208
Dear Ms . Maria Race :
The Illinois Environmental Protection Agency (Agency) has completed
its technical
review of the attached provisional variance request (Attachment A) submitted by
Midwest Generation EME, LLC (Midwest), on March 12, 2007, for its Will County
Generating Station. Midwest has had an upset in its sanitary wastewater treatment
system that will require the cleaning of the media in the trickling filter
. Cleaning the
media and re-establishing biological growth will take approximately thirty days
. Based
on its review, the Agency GRANTS a provisional variance, subject to
the specific
conditions set forth below
.
Background
Midwest owns and operates a coal-fired steam electric generating facility near
Romeoville, Illinois
. Midwest has an on-site wastewater treatment system consisting of
an Imhoff tank followed by a trickling filter
. Discharge from this treatment system is to
the Chicago and Sanitary Ship Canal via Outfall 003 of NPDES permit 11,0002208. The
quantity of water discharged through Outfall 003 is approximately 0
.015 million gallons
per day (MGD)
. No industrial wastewater is discharges through Outfall 003 .
Prior to
being discharged to the Chicago and Sanitary Ship Canal, Outfall 003 is combined with
ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
March 14, 2007
CLERK'S OFFICE
Outfall 002 .
Outfall 002 is designated in NPDES permit IL0002208 as Recycle
Wastewater Treatment System Blowdown, with an approximate flow of 0
.88 MGD
.
Relief Requested
Midwest seeks a provisional variance from the BOD and TSS limits of Outfall 003 while
it cleans and re-establishes biological growth on the media in the trickling filter
. NPDES
permit limits for Outfall 003 are
:
Parameter
Monthly Avg. (mg/1)
Daily Max . (mg/1)
BOD
20
40
TSS
25
50
Midwest is requesting that during the term of the provisional variance it by allowed to
discharge up to 50 mg/1 BOD and 70 mg/I TSS .
Agency Determinations
The Agency has reviewed the requested provisional variance and has concluded the
following :
1 .
The environmental impact from the requested relief is predicted to be
minimal;
2
. No reasonable alternatives appear available ;
3 .
No public water supplies should be affected
;
4.
No federal regulations will preclude the granting of this request
; and
5
.
Midwest will face an arbitrary and unreasonable hardship if the request is
not granted.
Conditions
The Agency hereby GRANTS Midwest Generation EME, LLC a provisional variance
from the BOD and TSS limits for Outfall 003 of NPDES Permit IL0002208, subject to
the following conditions
:
A.
The provisional variance shall begin on March 14, 2007, and end no later
than April 27, 2007 .
B.
Midwest shall operate its system to produce the best effluent possible, and
at no time shall the effluent from Outfall 003 exceed the limits of 50
mg/l for BOD and 70 mg/I for TSS
. All other requirements of NPDES
permit IL0002208 will be maintained during the variance period
.
C.
The City shall notify Roger Callaway of the Agency by telephone at
217/782-9720 when the trickling filter is taken out of service and again
when it is returned to service
. Written confirmation of each notice shall
be sent within five days to the following address
:
Illinois Environmental Protection Agency
Bureau of Water - Water Pollution Control
Attention: Roger Callaway
1021 North Grand Avenue East, MC #19
Springfield, Illinois 62794-9276
G.
Midwest shall sign a certificate of acceptance of this provisional variance
and forward that certificate to Roger Callaway at the address indicated
above within one day of the date of this order
. The certification should
take the following form :
I (We) ,
hereby accept and agree to be bound by all
terms and conditions of the provisional variance granted by the
Agency
Petitionerin dated
Authorized Agent
Title
Date
The City shall continue to monitor and maintain compliance with all other parameters
and conditions specified in its NPDES Permit No
. IL0002208
.
Conclusion
The Agency grants this provisional variance in accordance with its authority contained in
Sections 35(b), 36 (c),
and 37(b) of the Illinois Environmental Protection Act (415 ILCS
5/35(b), 36(c), and 37(b) (2004)
. The decision to grant this provisional variance is not
intended to address compliance with any other applicable laws or regulations
.
Robert A . Messina
Chief Legal Counsel
cc :
Marcia Willhite
Roger Callaway
Vera Herst
Connie Tonsor
GC NER ]ION EIVf, LLC
March 12, 2007
Mr
. Roger Callaway
Manager
Wastewater Compliance Unit
Bureau of Water
Illinois Environmental Protection Agency
1021 North Grand Avenue East
P . 0. Box 19276
Springfield, IL 62794-9274
Subject
:
Request for Provisional Variance
BOD and TSS permit requirements
Will County Generating Station
NPDES Permit No . IL 0002208
Dear Mr. Callaway:
Per Section 35(b) of the Illinois Environmental Protection Act, Midwest Generation Will County
Generating Station respectfully submits this application for a provisional variance . The following
information is being supplied in support of the provisional variance application per requirements of
Title 35, Subtitle A, Chapter II, Part 180 .202 :
1 . A statement identifying the regulations, Board Order, or permit requirements from which the
variance is requested;
Midwest Generation is requesting a provisional variance from the NPDES permit IL0002208
requirements of meeting the following limits at Outfall 003, Sewage Treatment Plant Effluent :
•
Biological Oxygen Demand (BOD 5) limits of 20 mg/I (30 day average) and 40 mg/I
(daily maximum)
•
Total Suspended Solids (TSS) limits of 25 mg/l (30 day average) and 50 mg/I (daily
maximum)
2. A description of the business or activity for which the variance is requested, including pertinent
data on location, size, and the population and geographic area affected by the applicant's
operations;
Midwest Generation owns and operates a coal-fired steam electric generating facility located in
Romeoville, Illinois . Process wastewater, impacted stormwater and flows from other sources
are collected, treated at Midwest Generation's on-site wastewater treatment facility, and then
Midwest Generation EME, LLC
One Plnanoild Place
440 South LaSalle Street
Suite 3500
Chicago . It, 606113
'lei, 31253-560(12
Fax : 312 788 5526
limed : mraccC1mwgen .cnnt
Attachment A
Mill la L . IUCC
Sra .ior P'.nvironnsntel Huleineer
Illinois EPA
March 12, 2007
Page 2
discharged to the Chicago Sanitary and Ship Canal under Midwest Generation's NPDES
permit .
Midwest Generation is requesting a provisional variance from its NPDES permit requirements
to meet BOD 5
and TSS limits at Outfall 003 .
The on-site wastewater treatment facility consists of an Imhoff Tank followed by a trickling
filter
. Analytical samples in February 2007 exceeded the limit for BOD
. As we investigated
the reasons for this, we discovered an upset in our sewage treatment system that will require
cleaning of the rocks in the trickling filter
. During the time it takes to clean the rocks and for
the biological sludge to reestablish itself on the cleaned rocks, we will have noncompliances
with both the BOD and TSS limits
. We expect that the time necessary to both clean the rocks
and to re-establish the biological sludge will require approximately thirty days
.
3. The quantity and types of
materials used in the processor activity for which the variance is
requested, as appropriate
;
The quantity of water released through Outfall 003 per day is
.015 MGD of treated sanitary
wastewater
. Industrial process wastewater is not discharged through Outfall 003
. During the
time for which the variance is requested, we will still be treating the waste, however, the
system will not be as effective as usual as the biological system in the trickling filter
reestablishes itself
4. The quantity, types and nature ofmaterials
or emissions to be discharged, deposited or emitted
under the variance, and the identification of the receiving waterway or land, or the closest
receiving Class A and Class B land use, cis appropriate
;
Although it is difficult to estimate what the actual BOD and TSS values would be during the
time period for which this variance is requested, our estimates are that the TSS will not exceed
70 mg/I and the BOD will not exceed 50 mg/l
. The average Outfall 003 daily discharge is
approximately .015 MGD
. Please note that a highly conservative assumption has been made
regarding the concentrations in Outfall 003 during the proposed cleaning work and re-
establishment of the biological sludge .
5.
The quantity and types of materials in drinking water exceeding the allowable content, or other
pertinent facts concerning variances from the Board's public water supply regulations
;
No discharge to drinking water sources from activities conducted under this provisional
variance application would be expected . The receiving water, the Chicago Sanitary and Ship
Canal, is a Secondary Contact Use stream
. We do not believe there are any public water supply
intakes located in the vicinity of the discharge .
6. An assessment of any adverse environmental impacts which the variance may produce
;
All wastewater produced by the proposed activity will still be captured and directed to Midwest
Generation's sewage treatment plant for primary treatment prior to discharge under NPDES
Illinois EPA
March 12, 2007
Page 3
Permit 11
.,0002208
. Outfalls 002 and 003 are combined before discharge which should help
minimize the impact upon the receiving stream
. Minimal adverse environmental impacts
related to slightly higher BOD or TSS are expected relating to activities proposed under this
provisional variance application .
7.
A statement explaining why compliance with the Act, regulations or Board Order imposes
arbitrary and unreasonable hardship
;
Approval of this provisional variance application will allow Midwest Generation to properly
reestablish the biological sludge in the trickling water system
. Alternatives such as capturing
the water for disposal imposes an arbitrary and unreasonable expense to Midwest Generation
.
Operating the sewage treatment system as the biological sludge reestablishes itself will cause
little additional loading to the Chicago Ship and Sanitary Canal, a Secondary Contact
waterway .
8
. A description of the proposed methods to achieve compliance with the Act, regulations or
Board Order, and a timetable for achieving such compliance
;
Midwest Generation's waiver application covers a 45-day period that would allow the
biological sludge to reestablish itself and BOD and TSS levels to return to normal
.
9
. A discussion of alternate methods of compliance and of the factors influencing the choice of
applying for a provisional variance
;
Midwest Generation evaluated the possibility of bringing a tank on site to collect the
wastewater until the system reestablishes itself
. However, the tank volume required is very
large and it would be difficult to obtain such a tank and secondary containment on short notice
.
In order to reestablish the sludge in the Wastewater Treatment System, the system would need
to be used, so the tank would need to be added onto the existing trickling filter
. The time that it
would take to perform this engineering work would create undue hardship for the station and
during that time, waste would continue to flow through the outfall
. Providing temporary
showers and toilets for use at Will County Station also places undue hardship on the station and
will not be easily possible in the time necessary to have the work performed
.
10
. A statement of the period, not to exceed 45 days, for which the variance is requested ;
The requested period of the provisional variance is 45 days . The exact starting date would be
March 14, 2007 .
11
. A statement of whether the applicant has been granted any provisional variances within the
calendar year, and the terms and duration of such variances
;
Midwest Generation has not been granted any provisional variances within the calendar year .
12
. A statement regarding the applicant's current permit status as related to the subject matter of
the variance request
;
Illinois EPA
March 12, 2007
Page 4
Midwest Generation Will County Station has an NPDES permit and has had one
noncompliance in the month of February related to the BOD issue, but has had no other
exceedences .
13
. Any Board orders in effect regarding the applicant's activities and any matters currently before
the Board in which the applicant is a party
.
NA.
Midwest
Email atGeneration
mracena,mwgenlooks .coforward
m
if you
to
have
your
any
responsequestions
. Please
or desire
contact
additional
Maria Race
information(312)
925
.
3608 or via
---Sincerely,
Maria Race
Attachments
CC: Maria Race
Fredrick Veenbaas
May 31, 2005
Midwest Generation, LLC
Environmental, Health & Safety Department
One Financial Place
440 South LaSalle Street, Suite 3500
Chicago, Illinois 60605
Re:
Midwest Generation, LLC
Will County Generating Station
NPDES Permit No
. IL0002208
Final Permit
Gentlemen :
ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
1021 NORTH GRAND AvLNLIE
EAST, P
.O . Box] 9276,
SPRINGFIELD, ILLINOIS 62794-9276, 217-782-3397
JAMES R . THOMPSON CENTER, 100 WEST RANDOLPH, SUITE
7 1-300, CHICAGO, IL 60601, 312-814-6026
217/782-0610
ROD R. BLACOlevicH, GOVERNOR
RENEE CIPRIANO, DIRECTOR
R:a
Attachment B
JUN 0 2 2005
EE kiiiiioja~'
Attached is the final NPDES Permit for your discharge . The Permit as issued covers discharge limitations,
monitoring, and reporting requirements . Failure to meet any portion of the Permit could result in civil and/or
criminal penalties . The Illinois Environmental Protection Agency is ready and willing to assist you in
interpreting any of the conditions of the Permit as they relate specifically to your discharge .
The Agency has begun a program allowing the submittal of electronic Discharge Monitoring Reports
(eDMRs) instead of paper Discharge Monitoring Reports (DMRs)
. If you are interested in eDMRs, more
information can be found on the Agency website, http://epa.state.il.us/water/edmr/index .html. If your facility
is not registered in the eDMR program, a supply of preprinted paper DMR Forms for your facility will be sent
to you prior to the initiation of DMR reporting under the reissued permit . Additional information and
instructions will accompany the preprinted DMRs upon their arrival .
The Permit as issued is effective as of the date indicated on the first page of the Permit . You have the right
to appeal any condition of the Permit to the Illinois Pollution Control Board within a 35 day period following
the issuance date .
Should you have questions concerning the Permit, please contact Beth Unser at the telephone number
indicated above .
Sincerely,
Alan Keller, P .E.
Manager, Permit Section
Division of Water Pollution Control
SAK:BAK:BAU\99120101 .BAH
Attachment
: Final Permit
cc:
Records
Compliance Assurance Section
Des Plaines Region
Facility
USEPA
NIPC
ROCKFORD-4302 North Main Street, Rockford, IL 61103-(815) 987-7760
• DES PLAINES-9511 W . Harrison St, Des Plaines, IL.60016-18471 294-4000
ELGIN -
595 South State, Elgin, IL 60123-(847) 608-3131
•
PEORIA-5415 N . University St ., Peoria, IL 61614-(309) 693-5463
BUREAU OF L-IND - PEORIA -7620 N . University St
., Peoria, IL 61614--(309) 693-5462
• CNav,PAION-2125 South First Street, Champaign, IL 61820-(217) 278-5800
SPRINGFIELD --1500 S Sixth Street Rd
., Springfield, IL 62706-(217) 786-6892
COLLI,NSVILIE-2009 Mall Street, Collinsville, IL 62234-(618) 346-5120
MARION - 2309 W . Main St ,
Suite 116, Marion, IL 62959 - (618) 993-7200
pi,", m r,u Rrrvr, .,n Pecae
Expiration Date : May 31, 2010
Name and Address of Permittee :
Midwest Generation, LLC
Environmental, Health & Safety Department
One Financial Place
440 South LaSalle Street, Suite 3500
Chicago, Illinois 60605
Discharge Number and Name :
001 Condenser Cooling Water and House Service Water
A01 Reverse Osmosis Wastes
B01 Boiler Blowdown, Boiler Drain and Turbine Drain
C01
Cooling Water Intake Screen Backwash
002 Recycle Wastewater Treatment System Blowdown
003 Sewage Treatment Plant Effluent
NPDES Permit No . IL0002208
Illinois Environmental Protection Agency
Division of Water Pollution Control
1021 North Grand Avenue East
Post Office Box 19276
Springfield, Illinois 62794-9276
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
Reissued (NPDES) Permit
Issue Date : May 31, 2005
Effective Date : June 1, 2005
Facility Name and Address
:
Midwest Generation, LLC
Will County Generating Station
529 East Romeo Road
Romeoville, Illinois 60441
(Will County)
Receiving Waters :
Chicago Sanitary and Ship Canal
In compliance with the provisions of the Illinois Environmental Protection Act, Title 35
of III . Adm . Code, Subtitle C and/or Subtitle D, Chapter
1, and the Clean Water Act (CWA), the above-named permittee is hereby authorized to discharge at the above location to the above-named
receiving stream in accordance with the standard conditions and attachments herein .
Permittee is not authorized to discharge after the above expiration date
. In order to receive authorization to discharge beyond the
expiration date, the permittee shall submit the proper application as required by the Illinois Environmental Protection Agency (IEPA) not
later than 180 days prior to the expiration date .
Alan Keller, P .E .
Manager, Permit Section
Division of Water Pollution Control
SAK :BAK :BAU :99120101 .bah
Page 2
Flow (MGD)
See Special Condition 1
Total Residual Chlorine/
Total Residual Oxidant*
*See Special Conditions 3 and 4 .
NPDES Permit No . IL0002208
Effluent Limitations and Monitorinq
1 . From the effective date of this permit until the expiration date, the effluent of the following
discharge(s) shall be monitored and limited
at all times as follows :
Temperature
See Special Condition 5, 6 and 7
0 .2*
Daily
Continuous
1/Week
*Concentration
Curve
Daily
Continuous
LOAD LIMITS lbs/day
CONCENTRATION
OAF (DMF)
LIMITS mo/I
30 DAY
DAILY
30 DAY
PARAMETER
AVERAGE
MAXIMUM
AVERAGE
DAILY
MAXIMUM
SAMPLE
FREQUENCY
SAMPLE
TYPE
Outfall(s) : 001 Condenser Cooling Water and House Service Water
This discharge consists of :
Approximate Flow
1 . Condenser Cooling Water
587 .0 MGD
2 . House Service Water
78 .9 MGD
3 . Reverse Osmosis Wastes
0 .1 MGD
4 .
Boiler Blowdown
0 .023 MGD
5 . Boiler Drain
Intermittent
6 . Turbine Drain
Intermittent
7 .
Intake Screen Backwash
0 .433 MGD
Page 3
NPDES Permit No . IL0002208
Effluent Limitations and Monitorinq
1 . From the effective date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited
at all times as follows :
LOAD LIMITS Ibs/day
CONCENTRATION
DAF (DMF) LIMITS
ma/1
Outfall(s) : C01 Cooling Water Intake Screen Backwash*
'See Special Condition 8
30 DAY
PARAMETER
AVERAGE
DAILY
MAXIMUM
30 DAY
AVERAGE
DAILY
SAMPLE
MAXIMUM
FREQUENCY
SAMPLE
TYPE
Outfall(s) : A01 Reverse Osmosis Waste
This discharge consists of :
1 . Reverse Osmosis Waste
Flow
See Special Condition 1
Total Suspended Solids
Oil and Grease
Outfall(s) : B01 Boiler Slowdown, Boiler Drain and Turbine Drain
This discharge consists of:
1 . Boiler Blowdown
2 . Boiler Drain
3 . Turbine Drain
15
15
Approximate Flow
24-Hour Total
8-hour Composite
Grab
0 .1 MGD
1/Week
30
1/Week
20
1/Year
Approximate Flow
0
.023 MGD
Intermittent
Intermittent
Flow
See Special Condition 1
1/Week
24-Hour Total
Total Suspended Solids
15
30
1/Week
8-hour Composite
Oil and Grease
15
20
1/Year
Grab
Page 4
NPDES Permit No . IL0002208
Effluent Limitations and Monitoring
1 . From the effective date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited
at all times as follows :
LOAD LIMITS lbs/day
CONCENTRATION
DAF (DMF) LIMITS ma/I
'The sampling frequency for total iron and total copper shall be daily during discharge of non-chemical metal cleaning wastes . At all other
times the sampling frequency shall be twice per month .
"See Special Condition 9 .
30 DAY
PARAMETER
AVERAGE
DAILY
MAXIMUM
30 DAY
AVERAGE
DAILY
MAXIMUM
Approximate Flow
0 .88 MGD
Intermittent
Intermittent
Intermittent
Intermittent
Intermittent
Intermittent
SAMPLE
FREQUENCY
SAMPLE
TYPE
Outfall(s)
: 002 Recycle Wastewater Treatment System Blowdown^
This discharge consists of:
1 . Ash Sluice System Blowdown
a . Bottom ash sluice water
b . Units #1,2 3 and 4 slag tank overflow sumps
c . Non-chemical metal cleaning wastes
d . South area runoff collection basin effluent
2 . North area runoff collection basin effluent
3 . Chemical and control building floor drainage
Flow
See Special Condition 1
pH
See Special Condition 2
Total Suspended Solids
15
30
Daily
1/Week
1/Week
Continuous
Grab
24-Hour Composite
Oil and Grease
15
20
1/Week
Grab
Iron
1 .0
1 .0
2/Month'
24-Hour Composite
Copper
0 .5
1 .0
2/Month'
24-Hour Composite
Page
5
NPDES Permit No . IL0002208
Effluent Limitations and Monitoring
1 . From the effective date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited
at all times as follows :
LOAD LIMITS lbs/day
CONCENTRATION
DAF (DMF) LIMITS mg/I
30 DAY
DAILY
30 DAY
DAILY
SAMPLE
SAMPLE
PARAMETER
AVERAGE
MAXIMUM
AVERAGE
MAXIMUM
FREQUENCY
TYPE
'See Special Condition 10 .
Outfall(s) : 003 Sewage Treatment Plant Effluent
This discharge consists of:
1 . Treated Sanitary Wastewater
Approximate Flow
0
.015 MGD
(DMF 0 .03125 MGD)
Flow
See Special Condition 1
Daily
Continuous
pH
See Special Condition 2
1fWeek
Grab
Total Suspended Solids
6 .5
13 .0
25
50
1/Week
24-Hour Composite
BOD S
5 .2
10 .4
20
40
1/Week
24-Hour Composite
Total Residual Chlorine
0 .05
Daily'
Grab
Page 6
NPDES Permit No
. IL0002208
Soecial Conditions
SPECIAL CONDITION 1 .
Flow shall be reported, in "million gallons per day" (MGD), as a daily maximum and monthly average
. In the
event that no discharge occurs during a given month, a statement of "No discharge" shall be reported on the DMR submitted for that month
.
SPECIAL
on the DMR
CONDITION
form .
2
. The pH shall be in the range 6 .0 to 9 .0
. The monthly minimum and monthly maximum values shall be reported
SPECIAL CONDITION 3 . Total residual chlorine/total residual oxidant (TRC/TRO) shall not be discharged from any single generating unit
for more than two hours per day
. The daily mean concentration of total residual oxidant shall be based on a concentration curve
. The
concentration curve shall be generated using grab samples with a sampling frequency of five minutes or less over the exposure time
. The
exposure time is defined to be from the point of first detectable measurement to the point of the last detectable measurement of total
residual oxidant . Concentration curves shall be submitted with Discharge Monitoring Reports
. The frequency and duration of the oxidant
dosing period plus the amount of chlorine or bromine applied shall be reported on the Discharge Monitoring Reports
. For reporting
purposes, the daily discharge shall be the average of all non-zero values measured in a day and the monthly average shall be the average
of all daily discharges
. Discharge Monitoring Reports shall indicate whether chlorine or bromine compounds were used during the month
.
For the purposes of determining compliance, the highest single instantaneous TRCITRO concentration measured during compliance curve
sampling on any day will be regarded as the daily maximum concentration
. Total residual oxidant concentration shall be measured and
reported in terms of total residual chlorine .
SPECIAL CONDITION 4 . A discharge limit of 0
.05 mg/I (instantaneous maximum) shall be achieved for total residual oxidant (total residual
chlorine/total residual halogen) when bromine biocides are used for condenser biofouling control, in accordance with Special Condition
3 .
SPECIAL CONDITION 5 . The receiving waters for Outfall 001 are designated as Secondary Contact and Indigenous Aquatic Life Waters
by
standardSection
:
302 .408, Illinois Administration Code, Title 35, Chapter 1, Subtitle C, as amended
. These waters shall meet the following
Temperatures shall not exceed 93°F (34°C) more than 5% of the time, or 100°F (37 .8°C) at any time at the edge of the mixing zone which
is defined by Rule 302 .102 of the above regulations .
SPECIAL CONDITION 6 . In lieu of the requirements of section 302 .211(d) and (e), Illinois Administrative Code, Title 35, Subtitle C, as
amended, effluent shall not alone or in combination with other sources cause temperatures in the main channel of the Lower Des Plaines
River at the 1-55 Bridge to exceed the temperatures set forth in the following table, except in accordance with the allowable monthly
excursions detailed below :
Jan Feb Mar A rr
ADrr
May May June June
July
Aug Sept Oct Nov Dec
1-15
16-30
1-15
16-30
1-15
16-30
°F
60
60
65
73
80
85
90
90
91
91
91
90
85
75
65
These standards may be exceeded by no more than 3°F during 2% of the hours in the 12-month period ending December 31, except that
at no time shall Midwest Generation's plants cause the water temperature at the 1-55 Bridge to exceed 93°F . (Midwest Generation's plants
continue to be subject to the Secondary Contact Standards at the point of discharge) .
SPECIAL CONDITION 7 . Permittee shall comply with all temperature limitations as imposed by the Pollution Control Board's order in AS
96-10, dated October 3, 1996 .
SPECIAL CONDITION 8
.
The discharge from Outfall C01 is limited to Chicago Sanitary and Ship Canal make-up water intake screen
backwash, free from other discharges
. Adequate maintenance of the intake screen system is required to prevent the discharge of floating
debris collected on intake screens back to the canal .
SPECIAL CONDITION 9 . The Agency has determined that the effluent limitations in this permit constitute BAT/BCT for storm water which
is treated in the existing treatment facilities for purposes of this permit reissuance, and no pollution prevention plan will be required for such
storm water
. In addition to the chemical specific monitoring required elsewhere in this permit, the permittee shall conduct an annual
inspection of the facility site to identify areas contributing to a storm water discharge associated with industrial activity, and determine
whether any facility modifications have occurred which result in previously-treated storm water discharges no longer receiving treatment
.
If any such discharges are identified the permittee shall request a modification of this permit within 30 days after the inspection . Records
of the annual inspection shall be retained by the permittee for the term of this permit and be made available to the Agency on request .
Page 7
NPDES Permit No . IL0002208
Special Conditions
SPECIAL CONDITION 10 . For Outfall 003 : Any use of chlorine to achieve disinfection or for operation and maintenance purposes is
subject to 0 .05 mg/I daily maximum total residual chlorine limit . Sampling for total residual chlorine shall be performed on a daily basis
during the chlorination process . Sampling for total residual chlorine is not required when chlorine is not used . If chlorine is not used during
any monthly period, the penmittee shall report "no chlorine used" on the Discharge Monitoring Reports
.
SPECIAL CONDITION 11 . There shall be no discharge of polychlorinated biphenyl compounds .
SPECIAL CONDITION 12 .
There shall be no discharge of complexed metal bearing wastestreams and associated rinses from chemical
metal cleaning unless this permit has been modified to include the new discharge .
SPECIAL CONDITION 13 . The bypass provisions of 40 CFR 122
.41(m) and upset provisions of 40 CFR 122 .41(n) are hereby incorporated
by reference .
SPECIAL CONDITION 14
. The Agency may modify this permit during its term to incorporate biomonitoring requirements and additional
limitations or requirements based on the biomonitoring results . The Agency may also modify this permit to incorporate additional
requirements and/or limitations based on the effluent monitoring results
. Modifications under this condition shall follow public notice and
opportunity for hearing
.
SPECIAL CONDITION 15 .
Samples taken in compliance with the effluent monitoring requirements shall be taken at a point representative
of the discharge, but prior to entry into the receiving stream
.
SPECIAL CONDITION 16 . The Permittee shall record monitoring results on Discharge Monitoring Report (DMR) Forms using one such
form for each outfall each month .
In the event that an outfall does not discharge during a monthly reporting period, the DMR Form shall be submitted with no discharge
indicated .
The Permittee may choose to submit electronic DMRs (eDMRs) instead of mailing paper DMRs to the IEPA . More information, including
registration information for the eDMR program, can be obtained on the IEPA website,
h ttp ://www.epa .state .il .us/water/edmr/index.htmi .
The completed Discharge Monitoring Report forms shall be submitted to IEPA no later than the 28th day of the following month, unless
otherwise specified by the permitting authority .
Permittees not using eDMRs shall mail Discharge Monitoring Reports with an original signature to the IEPA at the following address
:
Illinois Environmental Protection Agency
Division of Water Pollution Control
1021 North Grand Avenue East
Post Office Box 19276
Springfield, Illinois 62794-9276
Attention : Compliance Assurance Section, Mail Code # 19
SPECIAL CONDITION 17
. . The Permittee's facility has been deemed to meet the criteria as a Phase II existing facility (under section
316(b) of the Clean Water Act) pursuant to 40 CFR 125 .91 . Therefore, the permittee must fulfill the applicable requirements of 40 CFR
125 subpart J, and 40 CFR 122(r)(2), (3) and (5) . The regulation at 40 CFR 125
.95 requires submittal of a Proposal for Information
Collection (PIC) to support the development of a Comprehensive Demonstration Study (CDS) for the herein permitted facility
. The PIC
will be reviewed by the Agency and a response will be provided
. An extension of time to submit the CDS has been granted . Therefore,
you must submit your CDS on or before January 7, 2008
. Once the CDS has been reviewed by the Agency and a compliance strategy
has been approved, this permit will be modified to include implementation, monitoring, and reporting requirements pursuant to 40 CFR
125 .98 .
Page
8 .
ATTACHMENTH
Standard CondHbru
Definitions
Act meA.,
the
Illinois Envronmental Protection Act . Ch
. 111 112
IN
Rev . Slat . Sec 1001 .
1052 as Amended
.
Agency means die Illinois Environmental Protection Agency .
Bleed means one Illinois Pollution Control Board .
Clean Wataa Act (formerly referred to as the Federal Water Pollution Control Acol means
Pub t . 92-500 as amended 33 U S C . 1251 et set
NPDES National Pollutant Discharge Elimination System) means the national program for
issurag, modifying, revoking and reissuing, lerminaling, conducting and enforcing permits . and
imposing and enforcing Pretreatment requirements, under Sections 307 . 402 . 310 and 405
of the Clean Water Act
USEPA means me United States Environmental Protection Agency .
Daily Obsolete" ream the discharge of a pollutant measured during a calendar day or any
24-four period that reasonably represents the calendar day for prposes of sampling
. For
pollutants with limitatons upessed m units
of mass, the "daiN discharge'' is calculated as
the total mass of the pollutant discharged over the day For pollutants with limitations
espnssed an other
onus of measuremente the "daily discharge" la calculated as the average
measurement of the polluted over the day
Meet
. Daily Diacbrp WnltatIon daily malmuml means the highest allowable daily
dscnarge
Average MonWy Discharge Limitation (30 day average) spans the highest allowable
average of daily discharges over a calendar month, calculated a the sum of ale daily
discharges maasued dudg a calendar month divided by the number of daily discharges
r nesured dakg that mottle .
Average Weakly Dladsarq Umltation 47 day average) means the highest allowable
.wedges of daily dlacharges other . calendar week, calculated a the sum of ell daily discharges
muNaed during a calendar week divided by the number of daily, discharges measured dunng
that weed .
Net Mwregement Psetleea IBMPsI means schedules of ativities, prohibitions of
pyAdAAA
. mantenance procsduns, and other management
actp.
t o prevent or reduce the
poldao0 of waters of the State . BMPs ale include treatment rpomposeta, operating
pocedofa
. and practices to control plant site runoff, spillage or lesks, sludge or waste
dfepoW, or drainage from raw material storage .
Aliquot nape a sample of specified volume used to make up a total composite ample
.
Grb salotple more an individual ample of at leas) 100 milliklen cdbcted al a rendomly-
seleded tins over a period not esceeding 15 minutes .
24 Ftaer Cenpoefs Sample means a combination of at least B sample aliquots of at least
100 mdi it ., collected at periodic intervals during the operating hods of a facility over a 24'
Fees,
period
B Haw Cafppfe Sample means a combination of at least 3 sampe aliquots of at least 100
mill i l iters,
collected at periodic intervals during the operating hours of a facility over an 0-hour
period,
Flow Proportional Comps/ta Sample means a combination of sample aliquots of at least
500 milE1M colected at pee iodic intervals such than either th time interval between each
aliquot
or
fine volume of each aliquot is proportional to either the stream flow at the lime of
sampling or the total stream flow since the collection of the previous aliquot .
III Duty to campy . The pamkrne mat comply with all conditions of this permit
.
Any permit noncomp"nce constitutes a violation of the Act ale is grounds for
enforcement action, permit termination, revocation and refssuence, modification,
or for dental of a Permit removal Application . The pemtittee shall comply with
effluent standards or prohibitions atabli .Nd under Section 307(a) of the Clean
Water Act for toxic pollutants within the time provided in IN regulations that
establish these standards
or
pohibitions. NM d de pond has et yet ban
modified to incorporate tai replacement
12)
Duty to haply
.
ff tai penninu wishes to continue an activity regulated by this
permit a her the espaion date of tnis permit the permittae must apply for and
obtain a new permit 6 the perming submits a proper
application
used by
tai Agency no later than 180 day. prior to the aspiration date, this permit shall
continue in full force And affect until the final Agency decision on me application
hes been made .
131 Need to NII a red ce activity Out a defense . It shall not be a defense for a
psrminu in an enforcement Action that it would have been ecaaary 10 halt or
reduce this
pamnmed activity m order to maintain compliance with the conditions
of this perms.
141 Duty to mitigate. The
.it free take ell reasonable step to m
prevent any discharge in violation of this permit which has a reasonable likelihood
of adversely affecting human health on the environment .
151
Proper operation and maintenance The permittae shall at AN times properly
operate and maintain AN facilities ale systems of treatment end control lend
Mated appurtenances) which am Installed or used by the permute to Achieve
compliance with the conditions Of this permit . Proper operation and maintenance
includes effective performance, adequate funding, adequate operator staffing and
training, and adequate laboratory and process controls, including appropriate
quality assurance procedures
. This provision requires the operation of back-up, or
auxillery facilities, or
similar systems only when necessary to achieve
compliance with the condition of the permit .
PRINTED ON RECYCLED PAPER
161 Permit actions. TMs permit may be modified, revoked and reissued, or terminated
for aua by the Agency pursuant to 40 CFR 122 62 . The filing of a request by the
permute for a prmul modification, revocation and reissuanu, on temknation . w a
notification of panned changes or anticipated noncompliance, does Out stay any
pecan condition
171
Property rights. This permit does not convey any property
rights of any sort or
any ro .shi ve privilege .
(8)
Duty to provide information The permittae shall furnish to the Agency within a
reasonable lime, any information which In, Agency may request to determine
whether cause esisls for modifyingl
revoking
and reissuing, or terminating this
permit or 10 determine compliance with the permit . The permillee shall also
furnish to the Agency, upon request, copies of records required to be kept by this
permit
191 Inspection and an,,, The permiuee shall allow an authorized repesentative of
the Agency, own the presentation of credentials and Other documents as may be
regrwed by law, in'.
(al
Enter
upon the prmmae's premises where a regulated facility a activity is
located or conducted, or where records must be
kept under the conditions
of this permit .
III
Have access to and
copy,
at rasonable times, any records that most W
kept under th conditions of this humid .
Icl Inspect at reasonable times any facilities, equipmem including monaw .g
and control equations t), practices, or operations regulated or required
under this permit, and
(d) Sample or monutor at reasonable times, for the purpose of alluring wood
compliance . Or as otherwise auhorized by In . Act, any substance, or
prenreten at any location .
110) Moalterli and records .
tat
Samples and measurements taken for the purpose of monitoring shall be
rprsuntalive of the monitored activity
01 The pennmw shall ruin records of all monitoring information. Assistant,
all calibration and maintenance records, and all oregiW strg chart
recordings for continuous monitoring instrumentation, copies of ell reporta
required by tnis permit end records of ell data used to complete the
application for this prmit for a period of at least 3 years from the date of
this permit m surement report or application, This period may be
arxsded by request of the Agency at any time
.
dl
Records of monitoring information shall idWde':
(I1
The date, exact place . and lime of sampling or measurements :
12)
The individualisl who performed the sampling or measurements :
131 The data( .) analyses were performed
:
14)
The individualist who performed the analyses .
151
The analytical techniques or methods used
; no
151
The results of such analyses .
Idl Monitoring must be conducted according to test procedures approved
under 40 CFR Pan 136, unless other test procedures have been specified
in this permit When no test pocedure under s0 CFR Pan 136 has been
approved, the permftles must submit to the Agency a lest nsethod for
approval . The permiuee shall calibrate and perform maintenance
procedures on all monitoring end analytical instrumentation at intervals to
aeure accuracy of measurements .
(111 Signatory requirement . All applications, reports or information submitted to the
Agency shall be signed end certified .
tat
Application . All permit applications shall he
signed as follows
(1) For a
.
.'portion':
by
a principal executive officer of at leas, the
level of vice president or a person or position having o vera1
responsibilM for environmental matters for the corporation :
121 For a yannerahip a sole propietorahip by a general partner p
the popwlor,
respectively or
131 For a municlpelity. Sore, Federal, p other public agency'y by
either a principal aecutiva offcer or ranking elected oflolal.
Ibl Reports.MIreportarequiredbypermits,orolNrinlormafionregiueetedtry
the Agency shall be signed by a person described in paragraph 1 .) Or by A
duly authorized representative of that person .
A
Person is a duty authorized
repesenubve
only
if.
11) The authorization is made in writing by a person described in
paragraph (A) : and
121 The authorization specifies either a individual or a position
responsible for me overall operation ofthe facility, gram which the
discharge orginatess such as a plant manager, superintendent or
person of equivalent responsibility : and
131 TN written ptlrortstion is submitted to the Agency .
