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The Environmental Protection Agency (EPA) is an independent agency of the United States government tasked with environmental protection matters. [2] President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order . [ 3 ]
Level IV mapping is still underway but is complete across most of the United States. For an example of Level IV data, see List of ecoregions in Oregon and the associated articles. The classification system excludes the U.S. state of Hawaii, which is not part of the North American continent.
The NPL guides the EPA in "determining which sites warrant further investigation" for environmental remediation. [2] As of June 6, 2024 [update] , there were 1,340 Superfund sites in the National Priorities List in the United States. [ 2 ]
This is the list of extremely hazardous substances defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. § 11002).The list can be found as an appendix to 40 CFR 355. [1]
In chemical structure, EPA is a carboxylic acid with a 20-carbon chain and five cis double bonds; the first double bond is located at the third carbon from the omega end. EPA is a polyunsaturated fatty acid (PUFA) that acts as a precursor for prostaglandin-3 (which inhibits platelet aggregation), thromboxane-3, and leukotriene-5 eicosanoids.
The EPA sets and enforces standards for air, soil and water quality, evaluates the impact of pesticides and chemical substances, and manages the Superfund program for cleaning toxic waste sites. The Export–Import Bank of the United States (EXIM) is the official export credit agency (ECA) of the United States federal government. Operating as a ...
The SWDA requires the EPA to maintain an up-to-date list of states that are potentially non-compliant with the federal standards. If continued infractions warrant federal intervention, the EPA must provide technical assistance, advice, and a 60-day notification to the state, so the state has a chance for remedial action. [19]
Diamond Alkali was added to the EPA's National Priorities List in 1987 and cleanup of the Lower Passaic is still underway. [9] Draining and development of the Everglades; Draining of the Mesopotamian Marshes in the 1990s; DuPont dumping of perfluorooctanoic acid (PFOA) in Parkersburg, West Virginia, USA 1951-2003. [10]