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Several states are pursuing revisions to their rules for wastewater produced from the oil and gas drilling sector, including issuing regulations to address water reuse, transport, transfer of liability, naturally occurring radioactive materials (NORM), and siting of underground injection control (UIC) wells to address seismic concerns, sources say.

EPA's Inspector General (IG) is urging EPA to update its 1991 guidance on when to issue a Safe Drinking Water Act (SDWA) Emergency Order and require all agency drinking water and water enforcement management and staff to attend training on the orders after the IG found the agency should have acted sooner in the Flint, MI, crisis.

EPA has finalized its voluntary emissions control guidelines for existing oil and gas operations in areas violating the federal ozone standard, prompting praise from advocates who say it will cut pollution pending an air rule for existing sources but a call from industry to delay use of the guidelines until EPA gathers more data on such a rule.

A coalition of agricultural groups is launching a suit over EPA's endangerment finding for aircraft greenhouse gases, in an attempt to preempt the regulation of carbon dioxide emissions resulting from the combustion of biofuels in any forthcoming agency standards for the sector.

The U.S. Court of Appeals for the District of Columbia Circuit is poised to hear consolidated challenges to EPA's novel stormwater permit for small municipalities in Massachusetts after the 1st Circuit transferred suits over the rule to the court, with the case posing a test of EPA's power to mandate strict permit measures like on-site stormwater retention.

EPA is formally requesting a headquarters-level meeting with the Federal Energy Regulatory Commission (FERC) to resolve the long-running controversy on whether the commission must analyze “indirect” greenhouse gas (GHG) emissions when reviewing the environmental impacts of natural gas infrastructure projects.

The municipal solid waste management sector is seeking greater clarity and uniformity on how EPA and states classify food waste that is processed to create energy, particularly in anaerobic digesters, in order to ensure progress is made in reaching national and state goals for keeping food waste out of landfills and reduce greenhouse gases (GHGs).