THIS A RESPONSE ACTION AGAINST THE RESPONDENTS UNDER SECTION 106(A) OF CERCLA TO UNDERTAKE ACTION TO PROTECT THE PUBLIC AND THE ENVIRONMENT FROM THE ENDANGERMENT. EPA HAS DETERMINED THAT THERE HAS BEEN A RELEASE AND THAT THERE EXISTS A THREAT OF FURTHER RELEASE INTO THE ENVIRONMENT OF HAZARDOUS SUBSTANCES FROM THE AERR CO SITE WHICH MAY PRESENT AN IMMINENT AND SUBSTANTIAL ENDANGERMENT TO THE PUBLIC HEALTH AND WELFARE AND THE ENVIRONMENT.