ILLINOIS POLLUTION CONTROL BOARD

May

5,

1988

IN THE MATTER OF:

JOINT PETITION OF THE CITY OF MORTON

AND THE ILLINOIS ENVIRONMENTAL

)

PCB 85-212

PROTECTION AGENCY FOR EXCEPTION TO THE

COMBINED SEWER OVERFLOW REGULATIONS

ORDER OF THE BOARD

(by R.

C. Flemal):

By Order

of May 9, 1986 the Board granted

the City of Morton

(“Morton”)

an exception to

35

Iii. Adm.

306.305(b)

pertaining

to

combined sewer overflows

(“CSO”).

Grant of the exception was

subject

to certain conditions,

as specified

in the May

9,

1986

Order.

On April

11, 1988

Morton filed

a Motion

to Modify one of the

conditions of

the May

9,

1988 Order.

Specifically, Morton

requests

that the deadline identified

in condition

1(a)

be

changed

from September

30,

1988

to September

30,

1989.

On April

21,

1988 the Illinois Environmental Protection

Agency

(“Agency”),

the Joint Petitioner

in this matter,

filed

a

Response

to Morton’s motion wherein the Agency registers support

for Morton’s request.

Condition 1(a)

specifies

that Morton shall provide excess

flow treatment at

its Sewage Treatment Plant No.

2

for all excess

flows reaching that plant.

it additionally specifies

that such

treatment

is

to consist

of primary treatment followed by chlorine

contact,

that flow measurement and sampling be undertaken, and

that all facilities necessary

to achieve same be in place by

September

30,

1988.

In support of the requested modification Morton and the

Agency note that Morton has already completed separation

of

sewers tributary to Plant No.

2 pursuant

to condition

1(c), well

ahead of

the October,

1991 deadline therein.

Joint Petitioners

believe

that the reduction

in tributary CSOs has resulted

in

fewer bypass events at Plant No.

2 than originally anticipated.

Thereto,

Joint Petitioners note that only one CSO event occurred

at Plant No.

2 during

1987,

and that that event was related

to

a

power outage;

this contrasts

to the three or four events per

year,

each of several days duration, which occurred prior

to the

improvements.

Joint Petitioners further note that

if the reduced frequency

of CSO events proves out,

Morton might

be able

to down—size

the

facilities originally designed

for compliance with condition

1(a),

and thus save

an estimated $150,000.

The additional

time

89—43

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—2—

is

requested

to conduct

event monitoring

such that the facilities

may

be appropriately redesigned.

Both Morton and the Agency

contend

that there would be minimal environmental impact on

the

receiving stream, Prairie

Creek,

during the interim.

The Board grants Morton’s motion

to extend the completion

date of condition

1(a)

of the Board’s Order

in PCB 85—212

(May

9,

1986),

by one year,

to September

30, 1989, subject

to the

condition that all other uncompleted requirements

of that Order

remain

in full force

and effect as

issued May

9,

1986.

Section

41 of the Environmental Protection Act,

Ill.

Rev.

Stat.

1985

ch.

111 1/2 par.

1041, provides

for appeal

of final

Orders of the Board within

35 days.

The Rules of

the Supreme

Court of Illinois establish filing requirements.

IT

IS SO ORDERED.

Board Member Jacob D.

Dumelle concurred.

I, Dorothy M.

Gunn, Clerk

of the Illinois Pollution Control

Board, hereby certify

that the above Order was adopted on

the

6c~-

day

of

________________,

1988,

by

a vote of

7-O

&t~~

~M.

//~L~~/

Dorothy

M. G

n, Clerk

Illinois Pollution Control Board

89—44