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• y. <br /> z <br /> CLOSURE SUMMARY FOR <br /> CERTIFIED GROCERS OF CALIFORNIA <br /> 1990 PICCOLI, STOCKTON CA <br /> Carol Oz <br /> September 25. 1997 A 20,000 gal. UST was removed from the site. Oil supply lines <br /> were discovered leading to a previously removed gasoline dispenser. <br /> September 26. 1997 Soil samples were obtained below the UST and stockpile. Soil <br /> sampling observed by PHS/EHD below existing UST slab. Contamination was <br /> evidenced in analytical samples collected from the stockpile but not below the UST. <br /> October 1, 1997 PHS/EHD witnessed soil sampling beneath piping run, dispensers <br /> and piping stockpile. Stockpiles and three pipeline samples evidenced contamination. <br /> October 9, 1997 UAR and Prop 65 completed. <br /> October 15. 1997 Overexcavation of 10 tons of contaminated soil at the piping#7 <br /> y <br /> sample area was observed by PHS/EHD. Clean fill was placed in the excavations and on <br /> top of that the stockpiled soil was placed. <br /> October 16. 1997 . Site entered LOP. <br /> January 21 1999 . PHS/EHD sent letter to RP requesting more information and <br /> Closure Plan. <br /> March 22, 1999 -Reseived Closure Plan. i <br /> March 25, 1999 Began Closure Summary. <br />