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Sen. Tom Carper (D-DE), the top Democrat on the Senate environment committee, is stepping up his efforts to get legislative measures passed this year to regulate per- and polyfluoroalkyl substances (PFAS) under drinking water and Superfund laws after lawmakers were unable to secure a deal on the measures in defense legislation.

California and seven other states are committing to develop an action plan to put “hundreds of thousands more zero-emission trucks and buses” on the road to help slash conventional pollutants and greenhouse gases, an effort that will in part prioritize subsidies for technology and infrastructure development.

A major ethanol producer in a new legal filing says EPA is arbitrarily blocking approval of its cellulosic ethanol production method under the renewable fuel standard (RFS), with the dispute affecting both the broader biofuel industry and potentially the agency’s forthcoming proposal to slash statutory RFS blending volumes for cellulosic fuels.

A Maryland county is asking the Supreme Court to overturn a novel ruling from the state’s high court that the county says improperly expands the scope of a Clean Water Act (CWA) stormwater permit to make the county responsible for stormwater runoff outside of its control and prevents judicial review of the stormwater system’s regulatory classification.

The Trump administration is urging a federal judge to quickly back its litigation challenging California’s decision to link its greenhouse gas trading program with a similar system in Quebec, arguing in a summary judgment motion that the move tramples on the president’s role in setting foreign policy.

The Center for Biological Diversity (CBD) is faulting EPA’s proposal to approve plans by California’s Imperial County for tackling its “moderate” nonattainment with the 2008 federal ozone standard, saying air pollution from Mexico is hindering air quality in the area and justifies a stricter “serious” nonattainment finding and emissions plans.

EPA is considering elevating cleanup decision-making at the massive Portland Harbor, OR, cleanup to Administrator Andrew Wheeler’s office after the agency had rejected claims from an industry group that sampling it conducted shows greater than expected river recovery and warrants revised remedial action levels and other changes.