On March 14, 2013, Representative Jared Polis (D-CO) introduced a bill (H.R. 1154) to amend the Clean Air Act (CAA) to eliminate the exemption for aggregation of hazardous air pollutants from oil and gas sources. CAA § 112(n)(4) currently prohibits the aggregation of emissions from "any oil or gas exploration or production well (with its associated equipment) and emissions from any pipeline compressor or pump station." In addition to eliminating this exemption, H.R. 1154 would require U.S. EPA to issue a final rule adding hydrogen sulfide to the list of hazardous air pollutants under CAA § 112(b) and a separate rule to include oil and gas wells as major sources and area sources of hydrogen sulfide under CAA § 112(c).
For more, see this Oil and Gas Alert.