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If Democratic presidential nominee Hillary Clinton wins the 2016 election, the biggest environmental policy of her administration might be defending and implementing a slew of air, climate, water and other rules finalized by President Obama's EPA, observers say, as Clinton is not expected to break significantly with the president's energy and environmental platform.

In a landmark ruling, the U.S. Court of Appeals for the 9th Circuit has ruled against a broad interpretation of “disposal” under the Superfund law, finding that previous decisions by the same circuit effectively bound the panel to conclude that a smelter’s emissions of hazardous substances that settled many miles away on land or water do not constitute “disposal” under the law.

EPA has issued a long-delayed final rule under the Toxic Substances Control Act (TSCA) setting standards for formaldehyde emissions from composite wood products, granting industry's requests to exempt certain laminated wood products from the rule while stopping short of some producers' calls to exclude a broader array of products.

States challenging EPA's greenhouse gas rule for existing power plants say a recent appellate ruling that blocked the agency's haze emissions plan for Texas and Oklahoma bolsters the states' attacks on EPA for inadequate review of grid impacts from the GHG rule, because the court faulted as insufficient EPA's grid reliability review for the haze plan.

EPA in its recently filed response to comments on its effluent limitation guideline for shale oil and gas wastewater is refuting industry claims that its failure to consider crafting mandatory pretreatment pollutant limits when it opted for an effective ban on indirect discharges of the sector's effluent violated the Clean Water Act (CWA), saying it found pretreatment limits infeasible.

A coalition of municipalities and industry groups is challenging EPA's approval of Minnesota's nutrient water quality standards for measuring the eutrophication of rivers and streams caused by excess nutrients, arguing that the methods approved are not scientifically proven.

Environmental groups are strongly criticizing EPA's draft drinking water amendments to protective action guides (PAGs) for radiological emergencies, arguing the plan would allow radionuclide concentrations far beyond Safe Drinking Water Act (SDWA) limits and disparaging the agency for failing to disclose concentration levels for most of the radionuclides under the guidance.