Laws & Regulations

Engine Certification and Compliance Testing

The National Vehicle and Fuel Emissions Laboratory (NVFEL) tests a portion of all heavy-duty diesel and small gasoline engines intended for sale in the United States to confirm compliance with EPA’s exhaust emissions standards.

Vehicle Certification and Compliance Testing

The National Vehicle and Fuel Emissions Laboratory (NVFEL) tests a portion of all new cars and trucks to confirm compliance with EPA’s exhaust emissions standards, and to verify the accuracy of fuel economy test results submitted by each manufacturer.

Texas SIP: 30 TAC 117.201-117.223: Commercial, Institutional, and Industrial Sources; SIP effective 2000.10.31

Texas SIP: 30 TAC 117.530. Compliance Schedule For Nitric Acid and Adipic Acid Manufacturing Sources; SIP effective 2000.10.31

Texas SIP: 30 TAC 117.301-117.321: Adipic Acid Manufacturing; SIP effective 2000.10.31

Texas SIP: 30 TAC 117.401-117.421: Nitric Acid Manufacturing - Ozone Nonattainment Areas; SIP effective 2000.12.26

Texas SIP: 30 TAC 117.101-117.121: Utility Electric Generation; SIP effective 2000.10.31

Texas SIP: 30 TAC 117.460-117.469: Water Heaters, Small Boilers, ad Process Heaters; SIP effective 2000.12.26

Texas SIP: 30 TAC 117 table in 40 CFR 52.2270(c) updated effective April 16, 2001

Texas SIP: 30 TAC 117.131-117.149: Utility Electric Generation in East and Central Texas; SIP effective 2004.04.26

Texas SIP: 30 TAC 117.451-117.458: Nitric Acid Manufacturing - General; SIP effective 2000.10.31

Texas SIP: 30 TAC 117.560. Rescission; SIP effective 2000.10.31

Texas SIP: 30 TAC 117.540. Phased Reasonably Available Control Technology (RACT); SIP effective 2000.12.26

Texas SIP: 30 TAC 117.401-117.421: Nitric Acid Manufacturing - Ozone Nonattainment Areas; SIP effective 2000.04.03

Texas SIP: 30 TAC 117.570. Trading; SIP effective 2000.12.26

Texas SIP: 30 TAC 117.131-117.149: Utility Electric Generation in East and Central Texas; SIP effective 2001.04.16

Stone Quarrying, Crushing and Screening Facilities General Air Quality Permit Coverage for Camas Gravel Company Portable Plant at Hasselstrom Pit on the Nez Perce Reservation

EPA's approval of coverage under the SQCS general permit for Camas Gravel Company Portable Plant at Hasselstrom Pit, Winchester, Idaho on the Nez Perce Reservation

Hot Mix Asphalt Plants General Air Quality Permit Coverage for Helena Sand & Gravel at the Wapato Quarry on the Yakama Reservation

EPA's approval of coverage under the HMA general permit for Helena S&G - Wapato Quarry, Wapato, WA on the Yakama Reservation.

Errata for August 2014 Policy Assessment for the Review of the Ozone National Ambient Air Quality Standards

Corrections to the final draft ozone (O3) policy assessment include an appendix from the second draft that was inadvertently left out of the final draft, and minor text changes.

Updates to Information Presented in the Scope and Methods Plans for the Ozone NAAQS Health and Welfare Risk and Exposure Assessments, May 2012 Memo

This memorandum provides an overview of changes to the scope and methods plan, and reasons for them, to inform the CASAC Ozone Panel and the public as they prepare to review the first drafts of the Risk and Exposure Assessments.