ADMINISTRATIVE ORDER ON CONSENT FOR MALLINCKRODT VETERINARY, INC AND INTERVET, INC TO CONDUCT CARBON TREATMENT AND SAMPLING ON TWO DRINKING WATER WELLS AND TO STUDY HYDROGEOLOGIC CONNECTION BETWEEN SHALLOW AND DEPP AQUIFER IN MILLSBORO, DE.
AMENDED AOC ON 11/26/10: ADMINISTRATIVE ORDER ON CONSENT FOR RESPONDENTS TO CONDUCT EE/CA AT MILLSBORO TCE GROUNDWATER CONTAMINATION SITE.
AMENDED AOC ON 10/15/12: EPA REGION III SIGNED AMENDMENT NO. 2 TO ADMINISTRATIVE ORDER ON CONSENT FOR REMOVAL RESPONSE ACTION WITH INTERVET, INC. AND MALLINCKRODT VETERINARY, INC., ( RESPONDENTS ) UNDER SECTIONS 106 AND 122 OF CERCLA TO IMPLEMENT A FURTHER REMOVAL ACTION IN CONNECTION WITH THE MILLSBORO TCE GROUNDWATER CONTAMINATION SITE ( SITE ). THE SITE INCLUDES A PROBABLE TRICHLOROETHYLENE ( TCE ) SOURCE AREA LOCATED AT A FORMER POULTRY VACCINE MANUFACTURING FACILITY LOCATED ON OR AROUND 225 WEST DUPONT HIGHWAY, NEAR THE INTERSECTION OF WHARTON STREET AND SOUTH DUPONT HIGHWAY IN MILLSBORO, A PLUME OF TCE-CONTAMINATED GROUNDWATER MIGRATING FROM THE PROBABLE TCE SOURCE AREA, AND TWO PUBLIC DRINKING WATER SUPPLY WELLS IN THE COLUMBIA AQUIFER SERVING THE TOWN OF MILLSBORO. UNDER THE ORIGINAL AOC, RESPONDENTS ARE CONTINUING THE CARBON TREATMENT AND SAMPLING ON THE WELLS IN THE COLUMBIA AQUIFER. UNDER THE SECOND AMENDMENT TO THE AOC, RESPONDENTS WILL IMPLEMENT AN EXTRACTION AND REINJECTION PLANT TO EXTRACT CONTAMINATED WATER FROM THE COLUMBIA AQUIFER, TREAT IT, AND REINJECT IT INTO THE AQUIFER