A district court held that the prior owner of a contaminated site is jointly and severally liable for the current owner's response costs under CERCLA §107(a). The prior owner argued that the current owner has not incurred costs that are necessary or consistent with the NCP. But there is ample uncon...

The Tenth Circuit reversed in part and affirmed in part a lower court decision holding the seller of contaminated yet commercially viable buildings liable as an arranger under CERCLA. Due to hazardous substance contamination, the buildings were under an EPA order regulating their use. The prior owne...

A district court dismissed environmental groups' CAA citizen suit against EPA for failing to respond to their 2011 petition concerning ammonia gas pollution. In 2011, the groups petitioned EPA asking it to find that ammonia gas pollution endangers the public health and welfare, designate ammonia as ...

The D.C. Circuit dismissed a truck association's lawsuit against EPA challenging California's tractor-trailer emission rules. The association argued that the state regulations impermissibly discriminate against out-of-state tractor trailers in violation of the dormant Commerce Clause. The associatio...