ILLINOIS POLLUTION CONTROL BOARD

July

14,

1983

METROPOLITAN SANITARY DISTRICT

OF GREATER CHICAGO,

Petitioner,

v.

)

PCB 83—72

ILLINOIS ENVIRONMENTAL

PROTECTION AGENCY,

DISSENTING OPINION

(by J.D,

Dumelle):

My reason for dissenting

lies

in the possible health danger

to persons using the Illinois River downstream of the Calumet

Sewage Treatment Plant.

The record in P37—12,

Docket

D, was included in this proceeding

at the Petitioner’s request,

In that record,

Dr. Charles

Haas,

an expert in microbiology, had estimated fecal coliform lt~vels

at Morris,

Illinois at 28,700 colonies per 100 ml

if the ‘lisinfection

in the Chicago area ceased.

The Calumet STP discharges ahout

one—seventh of the total Chicago—area sewage plant

flow.

Applying

the one—seventh figure

to the 28,700 figure results

in levels

of 4,100 colonies per 100

ml at Morris.

The Chicago beach closing

standard

is

500,

The Morris location

is significant because

it is a center ~or

water-skiing.

No protection

in this variance

is given to those

using the Illinois River

if bacterial

levels

in fact rise above

500 and approach 4,100.

I would have required bacterial uonitoring

at Morris and a resumption of disinfection for levels over 500

during the water—skiing

season.

Respectfully submitted,

fl

~.

/7’,

7~-

~~f)~~/

A~~-Q~

•~

Jacob

D.

DuTnelle,

P.E.

Chairman

I, Christan

L. Moffett, /Clerk of the Illinois Pollution

Control Board, do hereby cer~..i~ythat the above Dissenting

Opinion was submitted this

~

day of

,

1983.

Christan L. Mof

¶t~’

Clerk