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A federal district judge has rejected environmentalists' novel suit aiming to force an oil and gas company to “aggregate,” or combine, emissions from its operations and trigger stricter Clean Air Act permitting requirements, but the decision leaves the door open to future citizen suits relying on an EPA test for aggregation that one appellate court has rejected.

Environmentalists are urging a federal appeals court to force EPA to tighten an air toxics rule for commercial, industrial and solid waste incinerators (CISWI) that they say unlawfully exempts the vast majority of the units from regulation, while industry is asking the same court to back its claim that the regulation is too stringent.

Chemical manufacturers are asking EPA to take the rare step of removing a chemical from the agency's Toxics Release Inventory (TRI) reporting program, calling for the delisting of the common cleaning agent ethylene glycol butyl ether (EGBE) from the TRI due to what industry says are low health and environmental risks.

Road builders and other industry groups critical of California's "in-use" air rules limiting use of non-road engines are urging a federal appeals court to vacate EPA's issuance of a Clean Air Act waiver to allow implementation of the rules, saying the agency's decision for the waiver was flawed and the rules cannot be replicated elsewhere.

EPA's Inspector General (IG) says the agency's updates to its environmental justice (EJ) screening tool could boost efforts by its 10 regional offices to use equity as a factor when inspecting facilities to determine their compliance with air toxics rules, including making it possible to provide data on multiple facilities and locations at once.

EPA and its environmentalist, state and utility industry supporters are defending the agency's use of “co-benefit” cuts in pollution not regulated by its power plant maximum achievable control technology (MACT) rule as a justification for the regulation, saying the human health protections from the cuts are a vital part of the MACT's benefits.