THIS ADMINISTRATIVE ORDER ON CONSENT IS ENTERED INTO VOLUNTARILY BY THE U.S. EPA, AND ASARCO, INCORPORATED AND RESURRECTION MINING COMPANY. THIS ORDER CONCERNS THE PERFORMANCE OF METALS SPECIATION WORK TOWARD THE EVENTUAL COMPLETION OF A REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RI/FS) AND REIMBURSEMENT OF RESPONSE COSTS INCURRED BY THE U.S. IN CONNECTION WITH THIS ORDER AT THE CALIFORNIA GULCH SUPERFUND SITE NEAR LEADVILLE, LAKE COUNTY, COLORADO.