THIS ADMINISTRATIVE ORDER IS AGAINST THE RESPONDENT, HOMESTAKE MINING COMPANY OF CALIFORNIA UNDER SECTIONS 104(B), 122(A), AND 122(D)(3) OF CERCLA TO PERFORM FEASIBILITY STUDY AT THE WHITEWOOD CREEK SITE. APPROXIMATELY 10 MILLION KILGRAMS OF MINING-RELATED WASTES ARE BELIEVED TO BE DEPOSITED ALONG THE SITE. CONSTITUENTS OF MINING-RELATED WASTES INCLUDE ARSENIC, WHICH IS CLASSIFIED BY EPA AS A HUMAN CARCINOGEN, AND OTHER METALS SUCH AS CADMIUM, LEAD, COPPER, SELENIUM, IRON, AND MAGNESIUM, WHICH ARE TOXIC TO HUMANS AND ANIMALS AT CERTAIN CONCENTRATION LEVELS.