EPA ISSUED A ROD FOR THE SITE ON JUNE 30, 1995. ON JULY 2, 2007, EPA SIGNED EXPLANATION OF SIGNIFICANT DIFFERENCE NO. 2 (ESD2) ADDING INSTITUTIONAL CONTROLS TO THE REMEDY SELECTED IN THE ROD. THIS IS A CERCLA 106 REFERRAL TO FACILITATE NEGOTIATIONS WITH THE SITE OWNER TO VOLUNTARILY IMPLEMENT THE INSTITUTIONAL CONTROLS.