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t w <br /> relative levels of contamination, but cannot be used to evaluate hydrocarbon levels with the <br /> confidence of laboratory analyses <br /> Laboratory Procedures <br /> Selected soil and groundwater samples collected will be analyzed for the presence of <br /> gasoline range total petroleum hydrocarbons (TPHg), benzene, toluene, ethylbenzene, <br /> xylenes (BTEX), and methyl tertiary butyl ether(MtBE) using EPA Method 8260 <br /> Rinsate Water and Stock Pile Soil <br /> Water generated dunng steam cleaning, and sampling of the borings will be temporarily <br /> stored in DOT-approved 55-gallon drums pending transport by Chevron's disposal contractor <br /> to an appropriate disposal or treatment facility Soil generated from the installation of the <br /> groundwater monitoring wells will be temporarily stored on site in DOT-approved 55-gallon <br /> drums pending characterization and transport by Chevron's disposal contractor to an <br /> appropriate disposal or treatment facility <br />