ILLINOIS POLLUTION CONTROL BOARD
July
 18,
 1996
IN MATTER OF:
 )
)
PETITION OF THE CITY OF LASALLE
 )
 PCB 86-2
FOR EXCEPTION TO THE COMBINED
 )
 (CSO Exception)
SEWER OVERFLOW REGULATIONS
 )
JAMES A MCPHEDRAN OF ANTHONY C.
 RACCUGLIA & ASSOCIATES APPEARED
ON
 BEHALF OF CITY OF LASALLE;
LISA E.
 MORENO APPEARED
 ON BEHALF OF THE ILLINOIS ENVIRONMENTAL
PROTECTION AGENCY.
OPINION AND ORDER OF THE BOARD (by G.T.
 Girard):
On September
 1,
 1995,
 the City of LaSalle
 (LaSalle) filed a second amended petition
(Am.Pet.) for exception to the combined sewer overflow
 (CSO) regulations at
 35
 Ill.
 Adm.
Code 306.305(a)
 and (b).
 On November 27,
 1995,
 the Board received a response to the
petition (Ag. Rec.) from the Illinois
 Environmental Protection Agency (Agency)
recommending that the Board deny the request for CSO
 exception.
On December 20,
 1995,
 the Board denied LaSalle permanent exception to the CSO
requirement and closed the docket.
 On January 23,
 1996,
 LaSalle sought reconsideration of
the Board’s order and requested that a hearing be held.
 On February
 2,
 1996,
 the Agency
filed a response which also asked that the Board reconsider and modify the December 20,
1995,
 opinion and order.
 The Agency also
 asked that this
 matter be
 set for hearing.
 On
February
 15,
 1996 the Board granted reconsideration, vacated its
 December 20,
 1995
 opinion
and
 order and
 set the matter for hearing.
Hearing was held before the Board Hearing Officer Deborah Frank on May 8,
 1996.
Briefs were filed by
 LaSalle and the Agency
 on June 4,
 1996.
 The Agency’s brief now
recommends that permanent exception be granted with certain conditions.
The Board first received a
 request from LaSalle for a permanent exception to the CSO
regulations on January 2,
 1986,
 and on January 9,
 1986,
 the Board accepted that petition.
 A
public hearing was held on July 21,
 1986.
 Additional information was provided by
 LaSalle on
August 21,
 1986.
 On April
 1,
 1987,
 the Board granted a
 temporary CSO exception to LaSalle
with conditions and
 retained jurisdiction over the proceeding.
For the reasons discussed below the Board will grant a permanent exception to 35
 Ill.
Adm.
 Code
 306.305(a) regarding first flush of storm flows and
 35
 Ill.
 Adm.
 Code 306.305(b)
for LaSalle’s
 CSO outfall 007 and
 CSO
 outfall 006A.
 The Board will further grant an
2
exception to the compliance deadlines of 35
 Ill.
 Adm.
 Code 306.306
 for CSO
 outfall
 003
subject to
 the conditions discussed below.
BACKGROUND
The City of LaSalle is located in LaSalle County
 along both sides of Illinois Route 351
from the north bank ofthe Illinois River to
 a point just south
 of Interstate Route
 80.
 The
Illinois
 River flows from east to west along the south boundary of the community.
The Board has previously discussed in detail the relevant background information in
this proceeding.
 Rather than repeat that information here, the Board hereby incorporates
 by
reference in this
 opinion the Board’s April
 1,
 1987 and November
 3,
 1994,
 opinions and
orders (In the Matter of:
 Petition of the City of LaSalle for Exception to Combined Sewer
Overflow Regulations,
 77 PCB 21,
 PCB 86-2;
 —
 PCB
—,
 PCB 86-2).
 The Board directs
interested persons to
 those previous decisions for a more comprehensive review.
CSO
 REGULATIONS
The CSO regulations are contained in 35 Ill. Adm.
 Code
 306.
 Section 306.305
provides as follows:
All combined sewer overflows and treatment plant bypasses shall be given
sufficient treatment to prevent pollution, or the violations of applicable water
standards unless
 an exception has been granted by the Board pursuant to
Subpart D.
Sufficient treatment shall consist of the following:
a)
 All dry weather flows,
 and the first flush of storm flows as determined
by the Agency,
 shall meet the applicable
 effluent standards; and
b)
 Additional flows, as determined by the Agency but not less
 than ten
times to
 sic
 average dry weather flow for design year, shall receive a
minimum of primary treatment and disinfection with adequate retention
time; and
c)
 Flows
 in excess of those described in subsection (b) shall be treated,
 in
whole or in part,
 to the extent necessary to prevent accumulations of
sludge deposits,
 floating debris and solids
 in accordance with 35
 Ill.
Adm.
 Code
 302.203,
 and
 to prevent depression of oxygen levels; or
d)
 Compliance with a treatment program
 authorized by the Board in an
exception granted pursuant to Subpart
 D.
3
Section 306.306
 sets forth specific timeframes for compliance with the provisions
 of Section
306.305.
Subpart D sets forth the CSO exception procedures.
 Section
 306.350 states that an
exception shall be granted by the Board based upon
 “water quality effects, actual and potential
stream uses,
 and economic considerations
 including those of the discharger and those affected
by the discharge”.
 Section
 306.360 allows the discharger to file a petition for an exception
either singly,
 orjointly with
 the Agency.
 In order for a discharger to receive a CSO
exception, a certain level ofjustification for the exception
 is required to be
 submitted.
 This
level ofjustification
 differs depending on whether the discharger filed a single orjoint petition
for CSO exception.
 The level ofjustification required of a jQj~~t
 petition is
 set forth in Section
306.362 which provides for a demonstration under
 Section 306.361(a) (i.e., minimal discharge
impact) which is not
 available to
 single petitioners.
 LaSalle as a
 single petitioner, justifies
 its
claim for a CSO exception based on Section 306.361(b), (c)
 and (d).
Section 306.361(d),
 applicable to
 single petitioners under
 Section 306.362,
 provides
that
 a discharger may establish that because special
 circumstances exist, a detailed water
quality evaluation (required pursuant to
 Sections 306.361(b) and (c)) would
 be inapplicable for
reasons of irrelevancy or the expense of data collection in relation to the relevancy of the data.
BOARD’S
 1987 OPINION
The Board’s April
 1,
 1987
 opinion (1987) indicated that the Agency testified that
LaSalle did take all the necessary
 steps
 to qualify as joint petitioners with the Agency,
including submitting a Phase I study
 on October
 5,
 1983 and a Phase II Study on October 23,
1984.
 (1987 at 2.)
 However, the Agency chose not to
 co-petition with LaSalle because of the
late
 date at which LaSalle
‘
s petition was received, and because of Agency concerns related to
whether water quality and
 other environmental
 impacts will be alleviated after the City’s
proposed improvements are completed.
 (Id.)
 Further, Mr. Tim Zook of the Agency testified
that although a detailed CSO
 impact study
 (i.e., Phase III Study) was not conducted, pursuant
to Section 306.361(b)
 and
 (c),
 a study prepared for LaSalle by Serco Laboratories does give
substantial
 information concerning water quality impacts.
The Board in its
 1987
 opinion also detailed the compliance options and the cost
effectiveness of each option.
 (1987 at 5-7.)
 The Board in the
 1987
 opinion held that LaSalle
had
 not justified a permanent CSO exception, but had justified a temporary CSO exception
 with conditions.
 Among other conditions,
 the Board order required an amended petition be
filed by March
 1,
 1990,
 as well as requiring LaSalle to construct and operate improvements to
its wastewater collecting
 system,
 and continue monitoring.
 On March
 22,
 1990,
 the Board
extended
 until March 1,
 1991,
 the deadline for the amended petition.
BOARD’S
 1994
 OPINION
4
In the amended petition of March
 1,
 1991,
 LaSalle stated that improvements have
resulted in the elimination of all dry weather overflows.
 (November 3,
 1994 opinion and
order (1994) at 2.)
 LaSalle pointed out
 that since the Board granted the temporary
 CSO
exception in
 1987,
 LaSalle has constructed and was operating
 improvements to its wastewater
collection
 system and treatment plant.
 (Id.)
 LaSalle also provided information regarding
improvements to the wastewater treatment plant which increased the design average flow of
the plant from 2.2 MGD to 3.3
 MGD.
 (Id.)
 However, the design maximum flow was
decreased
 from
 12 MGD to
 9.1
 MGD.
 (Id.)
LaSalle stated that the
 11th Street Pump
 station and the M & H Outfall have been
eliminated by
 installing a diversion structure near the location of the
 11th Street Pump
 Station,
routing all existing
 sewers which were tributary to the Pump
 Station through this
 structure,
and abandoning the M
 & H Pipe
 in place.
 (1994 at 2.)
 A 60”
 overflow pipe at the
 11th Street
overflow was also installed south
 of the old M & H Overflow pipe.
 (Id.)
 In 1991,
 LaSalle
also maintained that construction
 involving the Union Street interceptor, the Canal Street
interceptor, and the Creve Coeur Street Diversion structure upgraded the system and decreased
overflows.
 (Id.)
To further reduce the possibility
 of overflows, LaSalle had implemented a policy
 that
any
 major street repair would involve new storm sewers as well as adding a Street sweeping
program to
 remove debris
 before the debris can enter the sewer.
 (1994 at 2-3.)
 Finally,
LaSalle stated that its
 population had decreased by
 approximately 6.3
 since the
 1980
 census
and one large industrial user has been lost,
 while a second industrial user had significantly
upgraded its pre-treatment facility and a third
 is presently subject to a compliance plan to
install a pre-treatment facility.
 (1994 at 3.)
In November
 1994,
 the Board found that LaSalle’s March
 1,
 1991
 amended petition
lacked
 sufficient information to grant a permanent CSO exception as there were some areas
where dry-weather overflows may be occurring.
 (1994 at 4.)
 The Board stated:
The Board is
 particularly concerned
 in that LaSalle was offered an opportunity
to update the information before the Board in June of this
 year.
 LaSalle choose
not to file any
 further information with the Board.
 The Board finds that LaSalle
has failed to provide necessary data to allow the Board to
 determine what
impact the requested exception will have on the environment.
 Therefore,
 the
Board
 will not grant a permanent CSO exception at this
 time.
 Instead,
 the
Board will accept the Agency’s recommendation and extend the temporary
exception with certain conditions.
(1994 at 4.)
The Board’s 1994 order set forth eight conditions
 which included a requirement that
LaSalle shall eliminate
 all dry-weather overflows as well as providing any raw data LaSalle
has with respect to monitoring
 outfalls 003,
 004,
 006,
 006A and 007.
 (1994 at 6.)
 Further,
5
the Board’s order required LaSalle to repair outfall 006, prior to
 performing stream
inspections, so the flow can properly enter the Little Vermilion River.
 (Id.)
 The Board also
directed LaSalle, in consultation with the Agency,
 to:
 design and construct improvements at
CSO outfalls 006 and 004
 (5th Street and Marquette
 Street) to permanently eliminate the dry
weather overflows at these locations by March
 1,
 1995;
 complete a Phase II report as outlined
in 35
 Ill.
 Adm.
 Code 375.203
 and submit it to the Agency by May
 15,
 1995;
 and complete
and submit to
 the Agency a Plan of Study
 (POS) for a Phase III Evaluation at each CSO
 outfall
location by December
 1,
 1994.
 (Id.)
SECOND AMENDED PETITION
In general,
 the second amended petition states that LaSalle has continued the policy of
street sweeping
 and upgrading storm sewers.
 (Am. Pet.
 at 6-7.)
 LaSalle reiterates that certain
industrial users have ceased operations while other industrial users have upgraded pretreatment
facilities.
 (Am. Pet,
 at 6.)
 Further,
 LaSalle
 states that it has received recent approval from
USEPA
 of “upgraded standards regarding its
 wastewater treatment plant”.
 (Id.)
Specifically,
 LaSalle submitted
 information regarding each of the conditions from the
 Board’s 1994 order.
 Regarding Condition
 1,
 which required that LaSalle eliminate all
 dry-
weather overflows,
 LaSalle maintains that it has eliminated all
 dry-weather overflows.
 (Am.
Pet.
 at 10.)
 LaSalle states that it has removed the Marquette
 Street outfall (004) from the
combined sewer system and sealed the Fifth Street outfall.
 (Id.)
 LaSalle maintains that
 “any
flow currently existing with an
 outlet pipe presently,
 does not originate from any portion of
any
 remaining combined
 system”.
 (Id.)
 LaSalle admits that a
 “slight flow”
 was noticed
during dry weather at the Creve Coeur Street outfall
 (003);
 however,
 according to LaSalle an
investigation determined that the flow did not originate from the combined system.
 (Id.)
Rather, LaSalle speculates
 that the flow originates from LaSalle
‘
s water distribution system.
(Id.)
Conditions
 2
 and 3
 granted LaSalle a temporary CSO
 exception until December
 1,
1995 from
 35 Ill.
 Adm.
 Code 306.305(a)
 regarding the first flush of storm
 flows and from 35
Ill.
 Adm.
 Code 306.305(b) and required LaSalle to submit an amended petition on or before
 September
 1,
 1995.
 LaSalle timely filed this
 amended petition.
Condition 4 required LaSalle to provide any raw data it has with respect to monitoring
outfalls 003,
 004,
 006,
 006A and
 007.
 LaSalle submitted
 summaries of the data as Exhibits
 A
and B to the amended petition filed on September
 1,
 1995.
 (Am. Pet.
 at 11.)
 Condition
 5
required LaSalle to repair outfall 006,
 prior to performing stream inspections,
 so the flow can
properly enter the Little Vermilion River.
 LaSalle
 states that outfall 006 was eliminated on
November
 15,
 1994.
 (Am. Pet.
 at 11.)
Condition
 6
 set forth several requirements for LaSalle including a requirement to
design and
 construct improvements at outfalls 006 and 004 (5th Street and Marquette Street) to
permanently eliminate the dry weather overflows at these locations
 by
 March 1,
 1995.
 As
6
stated above, LaSalle maintains that it has eliminated all dry-weather overflows.
 (Am. Pet.
 at
11.)
Condition 6(b) required LaSalle to complete a Phase II report as outlined
 in 35 Ill.
Adm.
 Code
 375.203
 and submit to the Agency by May
 15,
 1995.
 LaSalle indicates that it
completed inspection for low flow events in September of 1994;
 however,
 stream and
environmental conditions have not resulted in an overflow at outfall 007.
 (Am. Pet.
 at 11.)
Therefore,
 LaSalle asserts it was unable to fully comply with condition 6(b).
 (Id.)
Condition 6(c) required LaSalle to complete and submit to
 the Agency a Plan of Study
(POS) for a Phase III Evaluation at each CSO outfall location by
 December
 1,
 1994.
 LaSalle
states that a Phase III stream study was submitted to
 the Agency
 by December
 1,
 1994.
 (Am.
Pet.
 at 11.)
 According to LaSalle, work associated with the study
 is being completed and data
in existence at the date of the
 filing of the amended petition was included in Exhibit B to the
petition.
 (Id.)
Condition
 6(d) prohibited expansion of the service area tributary to the combined
sewers and condition 6(e)
 required LaSalle to
 continue its
 monitoring of the combined
 sewer
overflows on a weekly basis and after every major rainfall.
 LaSalle states that no extensions
of service have been allowed and monitoring has been continued.
 (Am. Pet.
 at 12.)
 LaSalle
has submitted
 copies of all monitoring reports
 to the Agency and included a summary of the
 reports
 in Exhibit A.
 (Id.)
The remaining conditions
 in the Board’s 1994 order
 concerned procedural
considerations and
 LaSalle simply acknowledges those
 conditions in the second amended
petition.
 (Am. Pet.
 at 12.)
 LaSalle
 also
 states that it remains willing
 to
 “continue to
 be alert
to any additional issues that may arise”.
 (Am. Pet,
 at 12.)
 As
 an example of LaSalle’s
diligence, LaS alle reportedly
 “spent considerable time
 investigating potential
 solutions” to a
recent increase
 in the frequency and amount of backups.
 (Id.)
 LaSalle further indicates that it
has recently appointed a full-time city
 engineer with
 “considerable experience in environmental
matters”.
 (Id.)
MAY 8.
 1996 HEARENG
Mr. William Etzenbach testified on behalf of LaSalle and indicated what additional
measures LaSalle would undertake to correct ongoing problems at CSO
 outfalls
 007,
 006A and
003.
 (Tr.
 at 76.)
 At CSO outfall 007,
 in dry weather there is
 infiltration of groundwater into
the discharge pipe.
 (Tr.
 at 78.)
 The discharge is contaminated primarily with metals.
 (Tr.
 at
78-79.)
 Mr. Etzenbach testified that LaSalle will dam the pipe at the bottom and pump the
 infiltrations back into the sewage
 system for treatment.
 (Tr.
 at 79.)
 The estimated cost of the
pumping station
 is
 $70,000.
 (Tr.
 at 81.) Mr. Etzenbach testified that LaSalle will have the
facility designed and
 plans submitted
 to the Agency for a construction permit by December 31,
1996,
 with completion
 of the project by December 31,
 1997.
 (Tr.
 at 92.)
7
With regard to problems identified in the Agency response to the discharge at CSO
outfall 006A,
 Mr. Etzenbach testified that the
 “visual appearance leaves nothing to be
desired”.
 (Tr.
 at 80.)
 However to
 insure that no
 further problems may occur, LaSalle
 is
prepared to
 install a hand raked bar
 screen.
 (Tr.
 at 80.)
 LaSalle further proposes that the bar
screen be
 visited on a weekly basis and after any rainfall event that might cause an overflow.
(Id.)
 Such visits would
 allow crews to rake the bar screen, raking the material into the sewer
system
 and performing remedial action if necessary.
 (Tr.
 at 80-81.)
 The cost of installing the
bar screen is estimated at $5,600.
 (Tr.
 at 81.)
 Mr.
 Etzenbach testified that the bar screen
could be fabricated and
 installed by the end of 1996.
 (Tr.
 at 92.)
Mr. Etzenbach testified that LaSalle does not have enough solid information to design a
plan for CSO outfall 003
 at this
 time; however, LaSalle does have a two-phase plan for
proceeding with bringing CSO
 outfall
 003
 into compliance.
 (Tr.
 at 82.)
 First,
 LaSalle will
construct a bar screen in the overflow manhole to be visited and maintained in the same
manner as the bar screen for outfall 006A.
 (Id.)
 Mr. Etzenbach testified that
 the bar screen
would provide immediate relief.
 (Tr.
 at 83.)
 Second,
 LaSalle would
 capture the entire
 first
flush and provide a secondary treatment
 and capture
 the next ten times
 average dry weather
flow and provide primary treatment.
 (Tr.
 at 83-84.)
 The second phase will require additional
investigation and study.
 (Tr.
 82-84.)
 Mr. Etzenbach testified that a very rough estimate for
the cost of proceeding with this plan would be just
 over $3,000,000.
 (Tr.
 at 89.)
 Mr.
Etzenbach testified that phase one
 could be
 completed by December 31,
 1996.
 (Tr.
 at 92.)
Mr. Etzenbach stated that the first flush rate and volume,
 and dry weather flow monitoring,
should be completed by June 30,
 1997,
 and construction alternatives by
 December 31,
 1999.
(Tr.
 at 92-93.)
 LaSalle would then choose the best plan by December 31,
 2000,
 with permits
and financing obtained by December 31,
 2001.
 (Id.)
AGENCY RESPONSE
After the Board
 issued the December 20,
 1995 order
 denying LaSalle a permanent
exception, the Agency joined LaSalle in asking the Board to reconsider the December 20,
1995
 order.
 The Agency
 also joined
 in LaSalle’s request for hearing.
 For the record, the
Board notes that the Agency,
 in its initial
 response to the amended petition,
 stated that the
Agency
 “cannot
 recommend” that the temporary exception to the
 CSO regulations be extended
nor can the Agency recommend that LaSalle be granted a permanent CSO exception.
 (Ag.
Rec. at 1.)
 Also for the record the Board will summarize the concerns raised by the Agency
in the initial response.
 However, at hearing and in the Agency’s post-hearing brief, the
Agency
 indicated that it now supported LaSalle
‘5
request for exception with
 certain conditions.
(Tr.
 at
 102;
 Resp. Br.
 at
 1.)
Response
The Agency acknowledges that LaSalle
 “has made significant improvements in its
overall C SO” system.
 (Ag. Rec. at 7.)
 However, the Agency is concerned that discharges
8
from certain CSO outfalls
 still
 apparently cause sludge deposits
 in the Illinois
 and Michigan
Canal (I &
 M Canal).
 (Id.)
The Agency indicated particular concerns about the conditions at
 CSO outfall 003
which discharges into the I & M Canal.
 (Ag. Rec. at 3-4.)
 By LaSalle’s
 own admission dry-
weather flow is
 occurring at this outfall apparently from the potable water distribution system.
(Ag.
 Rec. at 4.)
 The Agency
 is concerned that this
 is
 a potential cross-connection which is
prohibited by
 regulation.
 (Id.)
 In addition,
 the Agency points
 to the observations made by
LaSalle’s personnel when carrying out a low stream flow inspection in
 1994.1
 According to
the inspection:
A general overall inspection of the outfall area indicated the presence of rags,
paper and feminine hygiene products.
 A smell similar to
 that found in a bar
screen building was present.
 The water in these pockets was a milky
 green
color.
 There were also
 isolated areas of turbid green water with debris.
Probing of the bottom sediment,
 which appeared to be
 a sandy soil,
 indicated
the presence of fresh and partially deteriorated organic material.
 This sediment
was black, gritty
 and had a septic odor.
 Approximately twenty percent of the
bed appeared to contain these deposits which were
 1/4
 inch in depth in an area
of stream about 300 feet long.
Exhibit A, par.
 6.1-1;
 Ag.
 Rec. at
 4-5.
In addition to the Agency’s concerns involving
 outfall 003,
 the Agency is
 also
concerned about the conditions
 around
 outfalls 006A and 007.
 (Ag. Rec. at
 5.)
 In the area of
outfall 006A,
 according to LaSalle’ s inspections,
 is being used as an illegal dump.
 (Exhibit A,
par 6.2-1;
 Ag.
 Rec. at
 5.)
 The Agency believes that additional Phase II
 stream inspection
should be made in this area to
 insure that the debris is
 not masking impacts from the CSO.
(Ag. Rec. at 5.)
 Outfall 007 also has evidence of dry-weather flows,
 apparently due to
groundwater infiltration from
 an old
 industrial site.
 (Ag.
 Rec.
 at 6.)
 The Agency is
concerned that the outfall pipe may be serving
 as a conduit for transporting potentially
hazardous materials directly to the Little Vermilion River.
 (Id.)
Hearing and Agency Post-Hearing Brief
At hearing,
 Mr.
 Dean Studer testified on behalf of the Agency.
 (Tr.
 at 102.)
 Mr.
Studer indicated that the compliance plans
 testified to by Mr.
 Etzenbach on behalf of LaSalle
were acceptable to the Agency.
 (Tr.
 at 102-107.)
 Mr. Studer further testified that the
timeframes given for completion of the compliance plans
 were realistic and acceptable to the
Agency.
 (Id.)
1
 The inspection is discussed in
 Exhibit A to LaSalle’s
 second amended petition (Exhibit A)
titled “Update of Report of Monitoring Program to
 Comply with Illinois
 Pollution Control
Board Order No. 89-2 April
 1,
 1987.”
9
The Agency,
 in its post-hearing brief, recommends that LaSalle be granted a permanent
exception to 35 Iii.
 Adm.
 Code 306.305(a)
 regarding first flush of storm flows and 35
 Ill.
Adm.
 Code 306.305(b) for CSO
 outfalls 006A
 and 007.
 (Resp.
 Br.
 at
 1.)
 The Agency also
recommends that LaSalle be granted an exception to
 the compliance
 deadlines of 35 Ill. Adm.
Code 306.306
 for CSO outfall
 003.
 (Id.)
 The Agency further recommends
 conditions
 to be
included in the exceptions.
 (Resp. Br.
 at 7.)
 The conditions recommended by the Agency
set forth the plans for compliance testified to by Mr. Etzenbach.
 (Id.)
DISCUSSION
As previously stated a CSO exception shall be granted by
 the Board based upon
 “water
quality
 effects, actual and potential stream uses,
 and economic considerations
 including those
of the discharger and those affected by the discharge”.
 (Section
 306.350.)
 LaSalle has made
significant progress in correcting the deficiencies
 in LaSalle’s sewer overflow systems.
LaSalle has established
 that an exception
 is economically justified and the environmental
impact of the permanent exception has been minimized.
 LaSalle has addressed concerns of the
Agency
 and the Board and LaSalle has committed
 to correcting the remaining problems at
outfalls
 003,
 006A and 007 within a specific
 timeframe.
 Therefore,
 the Board
 will grant
permanent exception to
 35 Ill. Adm.
 Code
 306.305(a) regarding first flush of storm flows and
35
 Ill.
 Adm.
 Code 306.305(b) for CSO outfalls
 006A and 007.
 The Board also grants
LaSalle an exception to the compliance
 deadlines of 35
 Ill.
 Adm.
 Code 306.306 for CSO
outfall
 003,
 subject to
 the conditions
 set forth in the Agency’s brief.
 This
 docket is closed.
This opinion constitutes the Board’s findings of fact and conclusions of law.
ORDER
The City of LaSalle is hereby granted an exception from the combined sewer overflow
regulation of 35 Ill.
 Adm.
 Code 306.305(a)
 as it relates to
 the first flush of storm flows and
from 35 Ill.
 Adm.
 Code 306.305(b) for CSO
 outfall
 006A
 and CSO
 outfall 007,
 and
 from the
compliance dates of 35
 Ill.
 Adm.
 Code 306.306
 for CSO outfall 003,
 subject to the following
conditions:
1.
 LaSalle shall:
a.
 Install bar screens and maintain for CSO outfall
 006A and CSO
outfall 003 no later than December
 1,
 1996.
b.
 Install
 a pump station capable of transporting all
 dry weather flows
from CSO
 outfall 007 no later than December 31,
 1997.
10
c.
 Complete a monitoring program at
 CSO outfall 003
 sufficient to
determine first flush rate and dry weather flow volumes no
 later than
June 30,
 1997.
d.
 Develop and
 select a compliance
 alternative for CSO outfall 003
 no
later than December 31,
 1999.
e.
 Complete design and submit a construction permit to IEPA for the
 selected CSO outfall 003
 compliance alternative
 no later than
December 31,
 2000.
f.
 Complete construction of the selected compliance
 alternative for CSO
outfall 003
 no later than December 31,
 2003.
2.
 The grant of exception does not preclude the Agency from
 exercising its
authority to require as a permit condition a CSO monitoring program
sufficient to assess
 compliance with this exception and
 any other Board
regulations and other controls, if needed,
 for compliance,
 including
compliance
 with water quality standards.
3.
 This grant of exception is
 not to be construed as affecting the
enforceability of any
 provisions
 of this exception, other Board
regulations,
 the Environmental Protection Act, or the federal Clean
Water
 Act.
IT IS SO
 ORDERED.
Board Members J.
 Theodore Meyer and M. McFawn dissented.
Section
 41
 of the Environmental Protection Act
 (415 ILCS
 5/41
 (1994)) provides for
the appeal of final Board orders within 35
 days of the date of service of this order.
 The
 Rules
of the Supreme Court of Illinois establish filing
 requirements.
 (See also
 35 Ill.
 Adm.
 Code
101.246
 “Motions for Reconsideration.”)
I, Dorothy M.
 Gunn, Clerk of the Illinois Pollution
the
 above opinion and order was adopted on the
/?~
 day of
of
 5-~
Board,
 hereby certify that
1996,
 by a vote
Illinois
 Control Board