ARCHIVED REPORTS_XR0012639 - Laserfiche WebLink

Home Browse Search

� . _aAl NOx t�S ACT I Oti'S TAKEN AT THE I SC W l VERY 5 I TE 1 1.11 THOI.pF' O 1 L CQIIPA%Y BLTWEEN SEP1'1 �1 .E1'+ 13 , MS AND DEC1=VJ3ER 13, 19S9 The September 13, 19SS date refers to Appendix A-9, wherein GTI responded to questions from the 511-HD (:appendix A-S) concerning their Pre IIn-,inary Site Assessment PCPCrt of Ma N, 25, 19SS (appendix A-7 ) . The . first contaminated soil +vas discovered during the removal of a 15 ,000 gal . , concrete fuel storage bunker during late 1957 or early i9S8. .Approximately 4 ,000 cu. yds . of soil were excavated at that time (Fig. 2) , of which about 2 ,000 cu. yds . were considered to be contaminated with leakage from the concrete tank ("diesel and/or bunker fuel oil ) . The removed spoil was stack- piled on site with all contaminated soil placed initially in Pile # 1 and later if, Pile # 2 (Figs . 2 & 3) . In as much as most of the surface at t1)e site is either covered with concrete foundation slab" or a G" asphalt topping, spoil could be easily stored without danger of groundwater infiltration . JTO , who ',"as in charge of demolition and cleaning up of the site for ISC, along +Pith other investors , purchased the entire property in July of 1958. According to JTO, buildings around the storage tank area ware de- molished during October & November 1985 . Then, about 12541 cu. yds. of non-contaminated spoil were placed on plastic in a pile South of the excavation area (Pile # 3) and about 1400 cu. yds. of contaminated soil were removed and placed on plastic sheeting overlying asphalt north of the excavation (Pile ;J 1 ) . At that 1 time the excavation was about 50' X 75" long and 20' deep. In December , 1988 a short work sun-mary and a soil remediation plan was submitted to the DHS by JTO. While waiting for a response to this document , the remaining buildings were demolished in Jan. & Feb 1589 (,appendix # 10) and most of the building material scrap removed from the site. Some rubble remains today, mostly in the form of concrete churks and rebar . I` EXCAVATION ." In this same report (Appendix 10) , it +vas proposed to enlarge the excavation to about 75'X 100' X 40' deep . These dimensions would approximately encompass the area between the outermost test borings and monitoring ++ells drilled by GTI . ++'herein no contaminated soli was found. Because the three monitoring wells had not shown the ground ter to be contaminated, it -,vas believed Thai all contaminated material could be recovered by an excava- tion of this size, estimated to be about an additional 5 ,555 cu. -- - ------- - --.—..--- - p and 2750 yds_- of uncontamina- ,... yds. . _o.f...--of--possibly con.t.;ntl-i ted.. sor._l_... _._ ted. It was proposed that sampling &testirig be done urrn 3