December 18, 2008IN THE MATTER OF:AIR QUALITY STANDARDS CLEAN-UP:AMENDMENTS TO 35 ILL.
at 1.
First, the Agency proposes that the Board amend the existing Section 243.125 by
incorporating the new eight-hour ozone standard and revoking the one-hour standard.
Adm.
Code 211.4770 (defining PM10), TSD at 2.
Specifically
2the Agency proposes to revoke the “annual PM10 standard which had been calculated as theannual arithmetic mean concentration of 50 micrograms per cubic meter.” Statement at 3, citing73 Fed. 38652 (July 18, 1997); see Prop. 415 ILCS 5/27, 28 (2006); 35 Ill.
Allowed
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