ILLINOIS POLLUTION CONTROL BOARD

September 7, 2000

IN THE MATTER OF:

PROPOSED MTBE GROUNDWATER QUALITY

STANDARDS AMENDMENTS: 35 ILL. ADM. CODE

620

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R01-014

(Rulemaking - Public Water Supply)

ORDER OF THE BOARD (by C.A. Manning):

On September 1, 2000, the Illinois Environmental Protection Agency (Agency) filed a rulemaking proposal

pursuant to Section 8 of the Groundwater Protection Act and Section 27 of the Environmental Protection Act (Act)

(415 ILCS 5/27) (1998)) to establish groundwater quality standards for the contaminant methyl tertiary-butyl ether

(MTBE). The proposal would set preventive response level standards of 0.020 mg/l and groundwater quality

standards of 0.070 mg/l for Class I and Class II groundwaters. The proposal would also amend 35 Ill. Adm. Code

620.505 “compliance determinations” to include specification of conditions when drinking water supply wells can be

used for such determinations, in addition to various other changes. The Agency requests that the Board adopt these

proposed rules “as expeditiously as practicable.”

The Board finds that the petition meets the minimum requirements of 35 Ill. Adm. Code 102.160(a) and

accordingly accepts this proposal for hearing. We hereby direct the hearing officer assigned to this matter to

schedule hearings as required pursuant to Title VII of the Act.

IT IS SO ORDERED.

I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, hereby certify that the above order was

adopted on the 7th day of September 2000 by a vote of 7-0.

Dorothy M. Gunn, Clerk

Illinois Pollution Control Board