The D.C. Circuit held that a home builders' association lacked standing to challenge EPA's and the U.S. Army Corps of Engineers' determination that two reaches of the Santa Cruz River in southern Arizona constitute "traditional navigable waters" (TNW) under the CWA. The court previously held in a si...

A district court held that a corporation subject to an EPA unilateral administrative order (UAO) in connection with the Columbia Nitrogen Superfund site in Charleston, South Carolina, may seek contribution under CERCLA §113 and not §107. Defendant companies argued that the corporation was preclude...