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ry N i I_ 7910 LOWER SACRAMENTO ROAD STOCKTON,CALIFORNIA DELTA PROJECT NO. 40-88-147 1.0 EXE['Trrrv>;crrn.rx...n., This report derails the activities and results.for closure of four underground storage tanks (two, 7,500-gallon and two 5,000-gallon tanks):at the Shell Service Station located at 7910 Lower Sacramento Road,Stockton, California. y On December 20, 1988,four underground storage tanks were excavated, removed,and transported to Triangle Construction,Inc., Sacramento, California.`�e:ght soil samples were obtained from the -bottom of-the cxcavation'and serf to EVreka Labora3Qr-es,•Inc:;'for chemical a taly;is.�f•benzene, I toluene,xylenes(BTX),total petroleum hydrocarbons(TPH),ethylene dibromide(EDB),and organic lead The,results indicated the soils.at a depth.of 15 feet contained petroleum hydrocarbons; Two hundrede'bit. yards of soil and backfill ware excavated from the forarcr tank oxcavatsan One hundred:ctibta yaYds of this:'soil were. used'to partially backfill thc-former excavatron The t,y cemaanidg 100 cubic yards of soil and 60 cubic yards of soli and backfill excavated from the product ;eana trenches were stoc*prled and sampled for chemical analysis.`'1 Hese soils were transported to te ` Forward"Landfill in Lodi;"California;ori February 19,'1989.' e Excavation of the soils from the new tank Iccation required the removal of approximately 800 tabic l-a 'yards of soil. Two soil samples were collected from the excavation at a depth of 13 feet for chemical t-I analysis. The results indicated the soils were free of petroleum hydrocarbons. Approximately 228 cubic yards of this soil were used to backfill the former tank excavation. During,00 weekof.: _ were transported to 6101 East Eight Mile Road,Stockton; December 9, 19813;572 cubic yards of soil , �4fotnia, fordisposal: tls Delta Environmental Consultants, Inc.(Delta),is hereby submitting the Tank Closure Report for the Shell Service Station located at 7910 Lower Sacramento.Road,_Stockton,-California--(Figure 1) --- - _._. _ __ att4n.was uadertaken;to.evaluate the conditioM of.the soil beneath the`undcrground storags feeler after.excavation and to observe the installatian of the now underground storage tanks.