United States of America, and State of California, Ex Rel. California Department of Health Services Hazardous Substance Account and Hazardous Cleanup Fund v. Shell Oil Company Union Oil Company of California Atlantic Richfield Company Texaco, Inc. Los Coyotes Estates Ramparts Research & Financial Corporation, United States of America State of California, Ex Rel. California Department of Health Services Hazardous Substance Account and Hazardous Cleanup Fund v. Shell Oil Company Union Oil Company of California Atlantic Richfield Company Texaco, Inc., and Los Coyotes Estates Ramparts Research & Financial Corporation

281 F.3d 812 UNITED STATES of America, Plaintiff-Appellant, and State of California, ex rel. California Department of Health Services; Hazardous Substance Account and Hazardous Cleanup Fund, Plaintiff, v. SHELL OIL COMPANY; Union Oil Company of California; Atlantic Richfield Company; Texaco, Inc.; Los Coyotes Estates; Ramparts Research & Financial Corporation, Defendants-Appellees. United States of America; State of California, ex rel. California Department of Health Services; Hazardous Substance Account and Hazardous Cleanup Fund, Plaintiffs-Appellees, v. Shell Oil Company; Union Oil Company of California; Atlantic Richfield Company; Texaco, Inc., Defendants-Appellants, and Los Coyotes Estates; Ramparts Research & Financial Corporation, Defendants. No. 00-55027. No. 00-55077. United States Court of Appeals, Ninth Circuit. Argued and Submitted June 4, 2001. Filed February 11, 2002. COPYRIGHT MATERIAL OMITTED Todd S. Kim, U.S. Department of Justice, Washington, DC, for plaintiff-appellant-cross-appellee United States. Timothy R. Patterson, Deputy Attorney General, California Department of Justice, San Diego, CA, for plaintiff-cross-appellee State of California. Ronald L.…