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FIRESTONE TIRE AND RUBBER COMPANY STOCKTON, CALIFORNIA SITE ASSESSMENT AND REMEDIATION WORKPLAN On April 25 , 1991 , 12 tanks were removed from the Firestone facility located at 400 N El Dorado St, Stockton, California (See Figure 1) Two permits , tank closure and fire department , were issued by the Public Health Services , San Joaquin County (PHS) , and the Stockton Fire Department , respectively , to Ryan Murphy, Inc prior to the tank removals ion ack to The site ' aand 30 ' s Recently, itdhadlbeentuseddaslagFb 1920sFirestone the 1920 s retail tare and automotive store. - Tank 4 was previously closed in-place with tanks 1 , 2 , and 3 under a permit issued to Firestone in 1967 . However, in this current tank work, Tank 4 was removed with Tank 5 since both tanks were located within two feet of each other and it was easier to remove both tanks than leave one in place. No soil samples were taken from the tank 4 location because of its previous nfirmeduby as . TPHShe drepresentativeetermination oon-sitenot ke a l during the sample wass con tank removal work. All the tanks were steel and coated with a black paint-like material. Although, tanks had notedscaling anyand ofctheotanksox�.dazed surfaces, no obvious holeswere Table 1 summarizes relevant tank and soil sampling information. Figure 2 indicates the location of the tanks at the site and the location of the soil samples retrieved for laboratory analysis . One soil sample was taken from the center of each lube oil tank (Tanks 8 ken) atneachoendhofetheern Tanknd of 6 and ank Tank 5 Tank16 locations . sample wass tato Table 1 Tank/Soil Sampling Information Tank Tank Tank Contents Tank Invert, Soil Sample, No of No S].ze, Feet below Feet below Soil Gallons Grade Grade Sam les 11 0 1 4 & 5 550 Waste Oil (WO) 8.25 11 0 2 6 1000 Gasoline (Gas) 7 83 8 thio 65 Lube Oil 6 0 8.5 1 ea 15 7 0 10-10 5 2 16 1000 WO/GAS