THIS IS A COST RECOVERY ACTION UNDER SECTION 107 0F CERCLA 42 USC, 9607, SARA, TO RECOVER $962,500. FROM GULF RESOURCES & CHEMICAL CORP FOR CERCLA 104 REMOVAL ACTION TO CLEANUP HAZARDOUS SUBSTANCES FROM BUNKER HILL SUPERFUND SITE. ON 5/28/86, A CERCLA REMOVAL ACTION WAS INITIATED BY REGION 10 EPA AT THE BUNKER HILL SUPERFUND SITE IN THE SILVER VALLEY OF NORTHERN IDAHO. EPA EXCAVATED AND REPLACED THE TOP LAYER OF SOIL FROM DUSTY AREAS WHERE CHILDREN PLAY, INCLUDING PARKS, PLAYGROUNDS AND ROAD SHOULDERS, AS WELL AS AREAS SIGNIFICANTLY CONTRIBUTING TO BLOWING DUST. THE FIRST PUBLIC HEALTH SURVEY CONDUCTED BY THE IDAHO DEPT OF HEALTH AND WELFARE IN 1974 INDICATED THAT EPIDEMIC PROPORTIONS OF CHILDREN LIVING NEAR THE BUNKER HILL COMPLEX HAD ELEVATED BLOOD-LEAD LEVELS DUE TO EXPOSURE TO HEAVY METAL CONTAMINATED DUST AND AIRBORNE PARTICULATES GENERATED DURING SMELTING OPERATIONS. HOWEVER, CHILDREN CONTINUED TO EXHIBIT TOXIC BLOOD-LEAD LEVELS EVEN AFTER THE CLOSURE OF THE SMELTER IN 1981 DUE TO CONTAMINATED EXPOSURE TO CON- TAMINATED SOILS. A 1983 STUDY BY THE CDC, IDHW AND PANHANDLE HEALTH DIST FOUND MANY AREA CHILDREN TO BE LEAD- TOXIC. (UNDER CDC DEFINITIONS A CHILD WITH BOTH ELEVATED BLOOD-LEAD AND ELEVATED LEVELS OF EURYTHROCYTE PROTOPOR- PHYRIN, AN ENZYME INDICATIVE OF RED BLOOD CELL PRODUCTION, IS LEAD TOXIC.) HIGHER BLOOD-LEAD LEVELS ARE ASSOCIATED WITH INCREASINGLY SEVERE ADVERSE HEALT