ILLINOIS POLLUTION CONTROL BOARD

February 15,

1979

PPG INDUSTRIES,

INC.,

Petitioner,

V.

)

PCB 78—210

ILLINOIS ENVIRONMENTAL

PROTECTION AGENCY,

Respondent.

ORDER OF THE BOARD

(by Mr. Werner):

The Petitioner’s Motion to Reopen the Hearing and Supplement

the Record

in this case

is hereby granted.

The Hearing Officer is

directed

to convene a hearing as soon as possible for the purposes

set forth herein.

The Respondent’s Objection to the Motion to Reopen

the Record has been duly considered,

and Respondent’s request that

the Board deny Petitioner’s Motion to Reopen the Record is hereby

denied.

When the Petitioner introduces additional evidence concerning

the effect of its emissions on ambient air quality standards,

it may

well be advisable to also address those questions and issues raised

by the Illinois Environmental Protection Agency.

Similarly, when

modeling studies are performed

in the Decatur area to determine the

effect of a possible increase of emissions

at the Mt.

Zion glass

plant,

the current United States Environmental Protection Agency

Guidelines on Air Quality Models should be taken into consideration.

In addition to the foregoing,

in reference to the float glass

manufacturing process,

it would be appreciated

if the

Petitioner

could make

it crystal clear as to the flow of gases from the various

components to the stack outlet,

showing temperatures, weight flows

in pounds per hour,

and draft losses at the various critical points.

It would also be appreciated if these data

(as well as the data

used in the modeling studies) were calculated in the English

(foot-pound-second)

system,

instead of the metric

(cgs)

system, for

our evaluation.

IT IS SO ORDERED.

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

Control Board, hereby certify the above Order was adopted on

the

~

day of

~ilc4..iL1/JAJ/

,

1979 by a vote of

________

~JOJnJ?

~

Christan L. Moffett, Cle

32-553

Illinois Pollution Control Board