ILLINOIS POLLUTION CONTROL BOARD

#R 70-2, THERMAL STANDARDS,

LAKE MICHIGAN

June

9,

1971

Rules and Regulations

SWB-7 and SWB-l5 are hereby amended

by adding the following new provisions applicable to Lake Michigan

and Calumet Harbor:

1.

(a)

All sources of heated effluents in existence as of

January

1,

1971 shall meet the following restrictions

outside of

a mixing zone which shall be no greater than

a circle with

a radius of 1000 feet or an equal fixed

area of simple form:

Ci)

There

snall be no abnormal temperature changes

that may affect aquatic

life,

(ii)

The normal daily and seasonal temperature

fluctuations that existed before

the addition

of heat shall be maintained.

(iii)

The maximum temperature rise at any time above

natural temperatures shall not exceed 3°F,

In addition, the water temperature shall not

exceed the maximum limits

(°

F.)

indicated in

the following table:

Jan,

Feb.

Mar,

Apr.

May

June

July

Aug.

Sept.

Oct.

Nov.

Dec.

45

45

45

55

60

70

80

80

80

65

60

50

(b)

The owner or operator of

a source of heated effluent

which discharges

0,5 billion British Thermal Units per

hour

(BTU/HR,)

or more shall demonstrate

in

a hearing

before

this Board not

less than

5 nor more than

six

years after the adoption of this regulation,

that dis-

charges from that source have not caused and cannot be

reasonably expected in the

future to cause significant

ecological damage

to the

Lake,

If such proof

is not

made to the satisfaction of the Board, backfitting of

alternative cooling devices shall be accomplished

within

a reasonable

time as determined by

the Board,

Cc)

The owner or operator of

a source of heated effluent

shall maintain such records and conduct such studies

of the effluents

from such source and of their effects

as may be required by

the Environmental Protection

Agency or in any permit granted under the Environmental

Protection Act,

Cd)

Backfitting of alternative cooling facilities will be

required

if,

upon complaint

filed in accordance with

Board rules,

it is found at any time that any heated

effluent causes significant ecological damage

to the

Lake,

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695

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2.

Any effluent source under construction

as of January

1,

1971,

but not in operation,

shall meet all

the requirements

of

Section

1 of this regulation and in addition shall meet the

following restrictions:

(a)

Neither the bottom,

the shore,

the hypolimnion,

nor

the thermocline shall be affected by any heated

effluent,

Cb)

No heated effluent shall affect spawning grounds or fish

migration routes.

Cc)

Discharge structures shall be

so designed as

to maximize

short—term mixing and thus

to reduce the area signifi-

cantly raised in temperature.

Cd)

No discharge shall exceed ambient temperatures by more

than 20°F.

(e)

Heated

effluents

from

more

than

one

source

shall

not

interact.

(f)

All reasonable ~steps shall be taken to reduce

the number

of

organisms

drawn

into

or

against

the

intakes.

(g)

Cleaning

of

condensers

shall

be

accomplished

by nechani-

cal devices.

If

chemicals

must

he

used

to

supplenent

mechanical

devices,

the

concentration

at

the

point

of

discharge

shall

not

exceed

the

96—hour

TLm

for

fresh

water orgahisms.

3.

(a)

No source

of heated effluent

which

was

not

in

operation

or under construction

as

of January

1,

1971

shall dis-

charge more than

a daily average of 0,1 billion

BTU/Fr.

(b)

Sources

of

heated

effluents

which

discharge

less

than

a

daily

average

of

0.1

billion

BTU/Hr,

not

in

operation

or

under

construction

as of January

1,

1971 shall meet

all

requirements

of

sections

1 and

2

of

this

regulation.

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