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VW-1 was additionally analyzed for reactivity, corrosivity, and ignitability to facilitate <br /> disposal The sample was found to be non reactive, non ignitable, and had a pH of 7.85 <br /> Current analytical results are depicted in Figure 6 with current analytical reports included in <br /> Appendix B Historical analytical data is listed in Table 1. <br /> 3.4r i <br /> Groundwate Quality Data <br /> No groundwater samples were collected during this investigation, however results of a recent <br /> quarterly well sampling event (July 1994) conducted at the site revealed no detectable <br /> concentrations of petroleum hydrocarbons <br /> 4.0 Conclusions <br /> Results of the recent geotechnical soil testing and review of boring logs indicate that the site <br /> is generally underlain by coarse grained materials with varying concentrations of fines <br /> Analysis of soil samples collected in locations surrounding the abandoned tanks (similar to <br /> the original soil sample collection points) appears to indicate that diesel originally <br /> encountered near the fill end of the 550 gallon abandoned tank may have naturally degraded <br /> over the past four years, as no detectable diesel concentrations were encountered during the <br /> current investigation Analysts of soil samples collected near the 300 gallon abandoned tank <br /> indicates the continued presence of detectable diesel concentrations. <br /> Soil samples were tested for the presence of volatile petroleum hydrocarbons with little to no <br /> detectable concentrations encountered The lack of volatile petroleum hydrocarbon <br /> concentrations appears to indicate that the diesel present in the site soil is naturally degrading <br /> with time <br /> One soil sample from each borehole was analyzed using the soluble threshold limit <br /> concentration (STLC) procedures. This test method involves determining the concentration of <br /> waste that will leach from a soil sample and potentially migrate to groundwater. Results of <br /> the STLC testing indicated very low levels of petroleum hydrocarbons which are potentially <br /> "mobile" <br /> One sample was analyzed to determine the naturally occurring hydrocarbon content of the <br /> soil Results of this test appear to indicate that the hydrocarbon concentrations reported <br /> M7Jo9-06-94/UST/940 i 38 mer 8 <br />