WASHINGTON, July 3 (TNSFR) -- The U.S. Environmental Protection Agency approved Oklahoma's updated air permitting program, finding the State Implementation Plan revisions comply with Clean Air Act requirements. The Environmental Protection Agency has finalized approval of selected revisions to Oklahoma's State Implementation Plan, updating the state's New Source Review permitting program and other general air quality provisions under the Clean Air Act. The final rule approves portions of revis  more

WASHINGTON, July 3 -- Power Performance Enterprises, Tulsa, Oklahoma, submitted a public comment letter to the U.S. Environmental Protection Agency urging the retention of the proposed Tier 4 emissions standards postponement and recommending a thorough reassessment of the Tier 3 and Tier 4 regulatory frameworks under Clean Air Act Section 202(a). The entity called for a rollback to Tier 2 emissions standards while proposing a technology-neutral safe harbor for in-use vehicles that can demonstrat  more