ILLINOIS POLLUTION CONTROL BOARD

July 31, 1973

ILLINOIS POWER COMPANY,

HENNEPIN GENERATING STATION,

)

UNIT NO. 1,

Petitioner,

v.

)

PCB 73—231

ENVIRONMENTAL PROTECTION AGENCY,

Respondent.

OPINION AND ORDER OF THE BOARD (by Mr. Seaman):

On July 5, 1973, Petitioner, Illinois Power Company, filed with

this Board its Petition to Extend Variance. Petitioner operates an

electric power generating station known as the Hennepin Station

located in Putnam County, Illinois. Petitioner, on July 14, 1972,

filed a Petition for Variance for Unit 1 of its Hennepin Electric

Generating Station. That Petition sought a variance to permit the

operation of Unit 1 in excess of current particulate standards

during those very limited periods when Unit 2 or its precipitator

were inoperative, gas was unavailable and the output of Unit 1 was

necessary for the reliability of electric service.

On October 10, 1972, based on the Petition and other submissions,

this Board entered its Order granting the variance, subject to

certain specified conditions,, for Unit 1 until October 10, 1973, sub-

ject to extension until June 30, 1974 (PCB71—l93).

Petitioner alleges that it has complied with all the conditions

of the original Order. Operation of Unit 1 in reliance upon the

variance has been very rare and work is continuing on schedule for

the precipitator on Unit 1. Petitioner believes, barring unforeseen

occurrences beyond Petitioner’s control, that the precipitator for

Unit 1 can be completed by June 30, 1974.

The Agency is of the opinion that Petitioner has complied with

all applicable conditions set forth in the Board’s Order in PCB72-297.

Further, the Agency is of the opinion that Petitioner is on schedule

for the installation of an electrostatic precipitator on Unit 1.

Petitioner’s control program should put Unit 1 into compliance

with the standards set forth in Rule 203(g) of Chapter 2, Part II

of the Pollution Control Board’s regulations. Petitioner’s sulfur

dioxide emissions are presently under the 6.0 lb/b6 BTU standard

set f0rth in Rule 204. The Agency has received no comment from the

public concerning this variance.

This Opinion constitutes the findings of fact and conclusions

of law of the Board.

8—687

---

—2—

IT IS THE ORDER of the Pollution Control Board that variance

be granted for the continued operation of Petitioner’s Unit 1

until June 30, 1974, subject to the following conditions:

1) All applicable conditions contained in the Board’s

Order in PCB72-297 shall remain in full force and effect.

2) Within thirty (30) days of the completion and startup

of Unit 1, Petitioner shall have performed a stack test on Unit 1.

Within five days of the date of said test, Petitioner shall notify

the Agency of the date and time of said test and allow Agency

observation if desired. Petitioner shall submit the results of

said test to the Agency as soon as they are available.

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

Board, certify that

the

above Op~nionand Order

was

adopted by the

Boa,rd

on

the ~~day of ~

l973~by

a ~7ote

_~L_to

0

“I