89 FR 49120
SIP Proposal: Michigan (removal of redundant definition for "used oil").
SIP Proposal: Michigan (removal of redundant definition for "used oil").
EPA designated one new equivalent method for measuring concentrations of ozone in ambient air.
SIP Approval: California (revisions to meet extreme area requirements for the 1997 eight-hour ozone NAAQS in the Riverside Co. nonattainment area).
SIP Approval: Michigan (removal of redundant definition for "used oil").
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.