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Commingled Plume#35 <br /> Chevron 9-4275/ARCO#2133 <br /> Site Conceptual Model <br /> September 1, 2006 <br /> Page 7 <br /> 32 Soil Sample Analytical Results <br /> TPHg, BTEX, or fuel oxygenates were not detected above the laboratory reporting limits <br /> in the soil samples collected beneath the product lines and dispensers In the tank pit <br /> soil samples, only MtBE was detected at a maximum concentration of 0 026 mg/kg (TP- <br /> 2) Two soil samples collected from each end of the 1,000-gallon concrete UST (TP-6N <br /> and TP-6S) contained 1 5 mg/kg TPHg, 0 001 mg/kg ethylbenzene, and 0 009 mg/kg <br /> total xylenes, all in TP-6N Soil results are presented on Table 7 Copies of the <br /> certified analytical laboratory reports and chain-of-custody documentation are presented <br /> in Appendix B <br /> • s <br /> • <br /> 94275-ARCO 2133 SCM 9-2006 7 <br />