1. These extensive data gaps are a result both of a lack of fundamental scientific lmowledge and of inadequate data collection, according to EPA and others;U S Gen;ENVIRONMENTAL INFORMATION: EPA Is TAKJNG STEPS TO IMPROVE INFORlvlATION MANAGEMENT, BUT CHALLENGES REMAJN 4-5,1999
2. EPA Watch: GAO finds major shortcomings in drinking water research
3. 98 (1992) (state regulation is preempted "where the scheme of federal regulation is so pervasive as to make reasonable the inference that Congress left no room for the States to supplement it") (quoting Rice v;E G See;Ass'n, 505 U.S,1947