State Agency does not necessarily have exclusive expertise to address remediation such that CWA & RCRA citizen suit claims are to be dismissed, especially where there is a lack of ongoing formal state proceedings

NL Industries owned a site through 2005. It entered into an administrative consent order with the State of New Jersey which required it to clean-up part of a site and investigate other portions, including sediments in an adjacent river. The sediments showed elevated metals. NL concluded that the...