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FINAL.IZL-MF-r)IA'nON MAN <br /> shell Oil Company <br /> 620 West Charter Way,Stockton,California <br /> Delta Proj=No.4"9-586 <br /> Pagel <br /> id During dht week of November 13, 1989, soil samples were collected from beneath the three former <br /> underground storage tanks and from along the former product distribution lines. Analytical results for soil <br /> ramples collected during the tank and line excavations are summarized in Table I Soil sample locations <br /> are ill Inted in Figure I <br /> Also during the week of November 13,1990,soil samples were collected from the base of the new tank vas ll. <br /> Analytical results for soil samples collected in the new tank vault are summarized in Table 3,and sample <br /> locations are indicated in Figure 3. Additional soil samples were collected in the areas of the form-rwaste <br /> ip <br /> oil tank,sump,and service bay hoists. Analytical results are summarized in Table 4 and soil sample locations <br /> are illustrated in Figure 3. <br /> TABLE 2 <br /> Former Tank Excavation Soil Samples <br /> Concentrations in milligrams per kilogram(equivalent to pans per million) <br /> Sample Depth(feet Ethyl- X11°No.— jLe�— ndg]l Benzene, Toluene benzene Acnes <br /> 14 66 170 74 320 3,200 <br /> N.End <br /> Tank I <br /> S.End 14 0.22 0,074 <0.05 0.098 1.4 <br /> Tank 1 <br /> N.End 14 0.053 0.071 0.092 0.53 4.2 <br /> Tank 2 <br /> S.End 14 <0.05 0.068 <0.05 0.087 1.4 <br /> Tank 2 <br /> N.End 14 97 200 100 550 6,100 <br /> Tank 4 <br /> S.End 14 29 120 48 230 3.700 <br /> tr <br /> Tank 4 <br /> NE Comer 19.5 110 290 100 500 7.100 <br /> Old E=v. 3 <0.05 <0.05 <0.05 0.12 <0.5 <br /> line#1 3 <0.05 0.087 0.098 3.1 12 <br /> Line#2 3 <0,05 0.058 0.27 6.3 <br /> Line#3 <br /> 17'rotil petroleum hydrocarbons as gasoline, <br />