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of the excavations This contaminated water and mud was stored on-site in three (3) Baker tanks <br /> until waste characterization could be made After pumping the boreholes dry, each borehole was <br /> backfilled using a three-sack sand slurry mixture The contaminated soil was transported from <br /> the elevator shaft to roll-off bin using a Bobcat Front Loader The contaminated soil was <br /> transferred from the roll-off bin using a backhoe and loaded into licensed hazardous waste <br /> transporter trucks The soil was removed from the subject property under chain of custody using <br /> a non-hazardous waste manifest for final disposition at TPS in Adelanto, California The <br /> groundwater was transferred from the Baker tanks into a licensed hazardous waste transporter <br /> tanker truck The groundwater was removed under chaui of custody using a non-hazardous waste <br /> manifest for final disposition at McKittrick Waste Treatment Facility in McKittrick, California <br /> The waste manifests are provided in Appendix VI <br /> At the completion of drilling activities, new slab rebar was set and a new cement slab was poured <br /> to replace the one demolished to access the contaminated soil <br /> 6.0 LABORATORY ANALYTICAL RESULTS <br /> 6.1 Original Excavation <br /> CRC collected and submitted fifty-three (53) soil samples for analysis from the <br /> excavation The soil samples collected were analyzed for TPH as hydraulic fluid using <br /> . EPA Method 8015M The laboratory results are summarized in Tables I and II Detailed <br /> laboratory analytical results with Quality Assurance/Quality Control (QA/QC) <br /> documentation are presented in Appendix V <br /> The laboratory analytical results from soil samples collected from the excavation indicated <br /> concentrations of TPH from the samples taken at the bottom of four (4) out of fifteen <br /> borings drilled to remove contaminated soil from the elevator pit Concentrations of TPH <br /> ranging from 89 ppm to 1,600 ppm were found in these four (4) soil samples The other <br /> eleven (11) bottom samples were non-detected Concentrations of TPH ranging from <br /> non-detected to 25,000 ppm were found in samples taken between 5 feet and the bottom <br /> samples throughout the excavation The highest reading of 25,000 ppm occurred in <br /> boring SB6 (Sample SB6A) at the 5 foot 6 inch level <br /> CRC Environmental Risk Management Inc Project H 3620-001-4 <br /> George Bravante,Receiver 2233 Grand Canal Boulevard <br /> January 19 1995 5 Stockton California <br />