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FINAL REMEDIATION PLAN <br /> Shell Od Company <br /> 624 West Charter Way,Stockton,California <br /> Delta Project No 40-88-586 <br /> Page 9 <br /> TABLE 4 <br /> Waste Oil Tank, Sump, and Hoist Soil Samples <br /> Concentrations in milligrams per kilogram (equivalent to parts per million) <br /> Sample 1 D <br /> Waste <br /> Sump Oil Tank Hoist 1 Hoist 2 <br /> Depth below grade 125 10 7.5 75 <br /> Chemical Constituent <br /> TPHa 4.5 1.2 <10 14 <br /> TPHb X10 <10 <10 X1.0 <br /> Benzene <0 05 X0 05 <0 05 <005 <br /> Toluene <01 <01 <01 <01 <br /> Ethylbenzene <01 <01 X0.1 <01 <br /> Xylenes 012 <0 i <01 X01 <br /> Cadmium 2.2 2.3 21 33 <br /> Chromium 12 11 16 24 <br /> Lead 17 16 19 13 <br /> Zinc 51 63 48 64 <br /> Oil and Grease 89 X300 110 100 <br /> aTotal petroleum hydrocarbons in the low to medium boiling point range <br /> bT otal petroleum hydrocarbons in the high boiling point range <br />