SIP Approvals: Nebraska (PSD preconstruction permitting program). 

SIP Approvals: Montana (attainment of the 1997 annual fine PM NAAQS for the Libby nonattainment area)

SIP Approvals: Missouri (idling of heavy-duty diesel vehicles).

SIP Approvals: Indiana/Kentucky (attainment of the annual average 1997 fine PM NAAQS for the bi-state nonattainment area).

SIP Approval: California (nitrogen oxide, carbon monoxide, sulfur dioxide (SO2), and particulate matter (PM) emissions for the San Joaquin Valley unified air pollution control district)

SIP Approvals: California (definition of terms for the Imperial County, Kern County, and Ventura County air pollution control districts).

EPA entered into a proposed administrative settlement under CERCLA that requires the settling party to pay U.S. response costs incurred at the National Starch and Chemical Company Superfund site in Mobile, Alabama.

EPA entered into a proposed administrative settlement under CERCLA that requires the settling party to pay $20,000 in U.S. response costs incurred at the Industrial Street Drum Superfund site in Dearborn, Michigan.

EPA entered into a proposed administrative settlement under CERCLA that requires the settling party to pay $76,630 in past and projected future U.S. response costs incurred at the Newton County Mine Tailings Superfund site in Newton County, Missouri.

EPA entered into a proposed administrative settlement under CERCLA that requires the settling party to pay U.S. response costs incurred at the Picayune Wood Treating Superfund site in Picayune, Mississippi.