RCRA CORRECTION ACTION ORDERS GMC TO REMOVE CHLORINATED SOLVENT DNAPL FROM AQUIFER, CONTROL THE MIGRATION OF GROUNDWATER CONTAMINATION , SAMPLE PRIVATE WELLS, INVESTI- GATE RELEASES ON-SITE AND OFF-SITE OF THE FACILITY, DETER- MINE CORRECTIVE MEASURES NECESSARY, AND IMPLEMENT CORRECTIVE MEASURES TO ATTAIN MEDIA CLEANUP STANDARDS.