ILLINOIS POLLUTION CONTROL BOARD

January

10,

1980

CENTRAL

ILLINOIS PUBLIC SERVICE CONPANY,

)

(Meredosia Power Station),

Petitioner,

V.

)

PCB 79—248

ENVIRONMENTAL PROTECTION AGENCY,

Respondent.

ORDER OF THE BOARD

(by Dr. Satchell):

On November 26 and December 20,

1979 Central Illinois

Public Service Company

(CIPS)

filed motions to stay conditions

of NPDES permits for its Neredosia power station.

Condition

003A of Attachment B3A, involving boiler chemical cleaning

wastes,

is stayed for the reasons given in the Board!s Order

of this date in PCB 79—246 and 247.

The other conditions for

which stay is requested involve total suspended solids

(TSS)

in

cooling water discharges.

CIPS contends that the permit con-

ditions would require it to reduce TSS to below background levels

and that it falls under the proviso of Rule 401(b)

of Chapter

3:

Water Pollution.

This

is a renewed permit and the condition is

apparently new although a similar permit condition relating to

ash ponds was rejected by the Board in a previous permit appeal

involving this facility

(PCB 74-149,

15 PCB 437, February

14,

1975).

The Environmental Protection Agency

(Agency)

filed

responses

to the motions on December

12 and 24,

1979.

The Agency

does not contend that these TSS conditions are mandated by new

regulations4

Apparently the Agency

is exercising discretion with

respect to the interpretation of the background concentration.

Since these are new discretionary conditions

they will be stayed.

The motion is granted.

IT IS SO ORDERED,

I, Christan L, Moffett, Clerk of the Illinois Pollution

Con~ro1Board, hereby certify the above Order was adopted on the

~

day of

,

1980 by a vote of

~Q.

Christan L. Moffet

erk

Illinois Pollution

trol Board

37—157