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89 FR 49120

SIP Proposal: Michigan (removal of redundant definition for "used oil"). 

89 FR 49874

EPA designated one new equivalent method for measuring concentrations of ozone in ambient air.

89 FR 49815

SIP Approval: California (revisions to meet extreme area requirements for the 1997 eight-hour ozone NAAQS in the Riverside Co. nonattainment area).

89 FR 49100

SIP Approval: Michigan (removal of redundant definition for "used oil"). 

89 FR 48850

The National Park Service (NPS) proposed to revise regulations governing the application, processing, and issuance of right-of-way permits for lands and waters administered by NPS.