ILLINOIS POLLUTION CONTROL BOARD

?larch 24, 1988

COMMONWEALTH EDISON CO., BYRON

GENERATING STATION,

Petitioner,

v.

)

PCB 88—53

ILLINOIS ENVIRONMENTAL

PROTECTION AGENCY,

Respondent.

ORDER OF THE BOARD (by J.D. Durrtelle):

This matter comes before the Board upon the March 22, 1988

filing by Illinois Environmental Protection Agency (Agency) of

its “Agency Recommendation” in the above—captioned provisional

variance.

Petitioner has requested that it be granted variance from

the requirements of 35 Ill. Adm. Code 304.124(a). Petitioner

requested that a 20 mg/i limitation be imposed during the period

of the variance. The Agency has determined that the higher iron

effluent level will have minimal environmental impact on

receiving streams and that compliance with the Act would impose

an arbitrary and unreasonable hardship.

Accordingly, Petitioner is granted a provisional variance

from the iron effluent levels of 35 Ill. Adm. Code 304.124(a)

subject to the following:

a) Variance shall begin when the contractor resumes work to

regenerate the stored resins, and continue for 45 days

or until the work needed to regenerate the demineralizer

resins is completed, whichever occurs first.

b) Effluent discharge from Outfall 001(a) shall be limited

to 20 mg/i for iron as a 30 day average during this

variance period.

c) Petitioner shall notify Jan Hopper of the Agency’s

Compliance Assurance Section via telephone at 217/782—

9720 when the regeneration work is started and when it

is completed. Written confirmation shall then be

submitted within 5 days to:

87—229

---

—2—

Illinois Environmental Protection Agency

Division of Water Pollution Control

Compliance Assurance Section

2200 Churchill Road

Springfield, IL 62706

ATTN: Jan Hopper

d) Petitioner shall during the term of the variance sample,

analyze and report for iron from Outfall 001(a).

Reports must be submitted with Petitioner’s DMR’s.

e) Petitioner shall operate and maintain its wastewater

treatment facilities so as to produce the best effluent

possible during this variance period.

IT IS SO ORDERED.

I, Dorothy M. Gut-in, Clerk of the Illinois Pollution Control

Board, here~certify that the above Order was adopted on

the

______________

day of ~

,

1988 by a vote

of

____________

Illinois Pollution Contrci. Board

—230