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on Figure 2. <br /> After collection and labeling, the samples were immediately put on ice and cooled to <br /> approximately XC. Chain of Custody documentation accompanied all samples from the time <br /> of collection to the time of delivery to the onsite mobile laboratory and the offsite stationary <br /> laboratory. Copies of the Analysis Request and Chain of Custody records for all samples are <br /> included in this UST removal report as Appendix E. <br /> — 2.4 Sample Analysis <br /> The methods utilized in the analysis of the UST excavation, overburden and overexcavation <br /> stockpile soil samples were modified EPA method 8015 with a gasoline and diesel standard, <br /> EPA method 8020 used for benzene, toluene, ethyl benzene, and xylenes (BTEX) and methyl <br /> tertiary butyl ether (MTBE) distinction. The stockpile composite samples were additionally <br /> analyzed for total lead using EPA method 6010 and for reactivity, corrosivity and ignitability <br /> (RCI) using California Title 22 methodology. All soil samples collected during tank removal <br /> and overexcavation activities on May 2 and 3, 1996, were analyzed onsite using a mobile <br /> laboratory operated by Sparger Technology Incorporated (Sparger) of Sacramento, California <br /> (with the exception of the total lead and RCI analyses which the mobile lab was unable to <br /> perform - these tests were completed by Sparger in their stationary laboratory in Sacramento, <br /> California). <br /> Analysis of soil samples (SSA-EMR-001 and SSA-EMR-002) collected from the gasoline <br /> UST excavation floor (middle and east end of the excavation respectively), revealed <br /> detectable gasoline, BTEX and MTBE lead concentrations. Soil sample SSA-EMR-001 was <br /> found to contain: 3,400 parts per million (ppm) unleaded gasoline, 3.7 ppm benzene, 59 ppm <br /> toluene, 39 ppm ethyl benzene and 163 ppm xylenes and 4.9 ppm MTBE, upon analysis. <br /> Analysis of soil sample SSA-EMR-002 revealed 18 ppm gasoline, 0.019 ppm benzene, 0.02 <br /> ppm toluene, 0.34 ppm ethyl benzene, 1.1 ppm xylenes and 0.73 ppm MTBE. Analysis of <br /> soil samples SSA-EMR-003, SSA-EMR-004 and SSA-EMR-005 (collected from the west end <br /> of the gasoline tank excavation, the east end of the diesel fuel tank excavation and the west <br /> end of the diesel fuel tank excavation respectively) revealed no detectable petroleum <br /> hydrocarbon concentrations. <br /> Analysis of composite soil sample STP-EMR-001, collected from the gasoline tank <br /> overburden stockpile, revealed no detectable petroleum hydrocarbon concentrations. Analysis <br /> 4 <br />