West Coast Home Builders, Inc., is a developer and builder of homes. West Coast owns a parcel of property near or adjacent to the Contra Costa Sanitary Landfill near Antioch, California (the CCSL Landfill). The CCSL Landfill was used as a disposal area for hazardous materials during the 1960s and 1970s, and for the disposal of municipal waste, including hazardous materials, until approximately 1992. West Coast alleges that the CCSL Landfill is the source of groundwater contamination on and under West Coast's property. West Coast sought recovery of response costs and contribution under CERCLA, declaratory relief under federal law, and monetary and injunctive relief under state tort law. In addition, West Coast sought relief through claims of negligence. Was either the CERCLA or the nuisance claim effective? Why? West Coast Home Builders, Inc. v. Aventis Cropscience USA, Inc., 2006 U.S. Dist. LEXIS 48023 (2006).