Approval and Promulgation of Implementation Plans; State of Missouri

EPA is approving a State Implementation Plan (SIP) revision submitted by the state of Missouri. EPA is approving a request to amend the Missouri SIP to include revisions to the St. Louis Solvent Metal Cleaning rule. The revisions to this rule include consolidating exemptions in the applicability section, adding new exemptions, adding definitions of new and previously undefined terms, and clarifying rule language regarding operating procedure requirements for spray gun cleaners and air-tight and airless cleaning systems. This revision will ensure consistency between the state and the Federally-approved rules.