THIS CASE IS AN ADMINISTRATIVE ORDER AGAINST THE RES- PONDENT UNDER SECTION 106(A) OF CERCLA TO UNDERTAKE ACTION TO PROTECT THE PUBLIC AND THE ENVIRONMENT. EPA HAS DETERMINED THAT THERE HAS BEEN RELEASE AND THAT THERE EXISTS A THREAT OF FURTHER RELEASE INTO THE ENVIRON- MENT OF HAZARDOUS SUBSTANCES FROM THE XTRON SITE WHICH MAY PRESENT AN IMMINENT AND SUBSTANTIAL DANGER.