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Performance Specification 12A for Mercury

Promulgated Performance Specification 12A - Specifications and Test Procedures for Total Vapor Phase Mercury Continuous Emission Monitoring Systems in Stationary Sources.

U.S. State of Texas Coal Combustion Residuals (CCR) Permit Program

information about Texas application submitted for EPA approval for Texas to permit coal ash units

Can a refiner with more than one refinery transfer oxygen and benzene credits from one of its refineries to another of its refineries?

See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . If a refiner generates credits at one refinery, these credits could be used to offset a shortfall at another refinery through a transfer of credits meeting all conditions of § 80.67(h).(7/1/94) This question and answer was posted at…

Last published: May 15, 2025

Can a refiner certify finished gasoline using method D-4294 or D-5354-94 (Antek Oxidation-UV Fluorescence Method) instead of D-2622 for sulfur? Will EPA accept other methods for measuring total aromatics content such as using mid-IR instruments?

See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . No. Again, alternate methods are not allowed for certification of the gasoline by the refiner or importer, with the exception of alternatives for oxygen/oxygenates and aromatics until January 1, 1997, but they can be used for downstream quality…

Last published: May 15, 2025

Risk Evaluation for n-Methylpyrrolidone (NMP)

Fact sheet for N-Methylpyrrolidone (NMP)

Can material that does not conform with commercial specifications for gasoline still be considered gasoline for compliance with the RFG regulations? For example, could a mixture of butane and MTBE be blended with non-VOC controlled simple model RFG? The b

See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . Blending components that are added to RFG must meet the standards for RFG and the party who conducts such blending must meet all requirements that apply to refiners. The regulations, however, do not require them to also conform…

Last published: May 15, 2025

EPA Seeks Comment on the Preliminary Finding of No Significant Impact (FONSI) for the Town of Marmet for Maryland Avenue Sewer Overflow Abatement project in Kanawha County, WV

The EPA has prepared this preliminary FONSI based on its independent Environmental Assessment of the project pursuant to Section 102 of the National Environmental Policy Act (NEPA) of 1969 and EPA’s NEPA procedures under 40 C.F.R. Part 6.

Comments Due Date: June 16, 2025
Geographic Locations: Mid-Atlantic, West Virginia

TSCA Section 21

TSCA Section 21 regulations collect data for use in conducting assessment of potential chemical risk are described.

EPA in New Hampshire

Portal for news and information about EPA's efforts in New Hampshire and NH environmental conditions.

MARPLOT Software

Part of the CAMEO suite, MARPLOT® is a mapping application that people can use to quickly create, view, and modify maps. Users can create their own objects in MARPLOT (e.g., facilities, schools, response assets) and display them on top of a basemap.

EPA in Maine

Portal for news and information about EPA's efforts in Maine.

First Clean Air Act Benefits and Costs Prospective Study - Press Release November 16, 1999

The economic value of the public health and environmental benefits that Americans enjoy from the Clean Air Act Amendments of 1990 exceed their costs by a margin of four to one, according to this EPA study released in 1999.

UST Performance Measures

EPA collects data from states and territories regarding underground storage tank (UST) performance measures.

Chemicals, Pesticides and Toxics Topics

Learn how to safely handle chemicals, the effects of certain toxins, which substances are controlled or managed, and safer alternatives.

Frequent Questions about Closeouts

EPA policy defines a closeout as the systematic process by which EPA determines that all required technical work under a grant or cooperative agreement has been completed by the recipient and EPA, and all applicable administrative requirements are met.