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Preliminary Investigation and Evaluation Report— California Cedar Products <br /> used to test soils for the presence of volatile organic compounds Sal samples <br /> ' were capped, labeled and placed in an ice-chest in preparation for transport under <br /> chain-of-custody to McCampbell Laboratory, a State Certified Laboratory located in <br /> ' Pacheco, California <br /> ' 2.2 Groundwater Grab Sample <br /> At location B4, a four-foot hydropunch screen was installed to 23 feet bgs to open <br /> the hole to groundwater between the depth of 19 and 23 feet bgs The depth of <br />' standing groundwater was 19 feet bgs as determined by sounding meter <br /> Groundwater was collected through polypropylene tubing equipped with a bottom <br /> ball check-valve allowing water to be lifted through the tubing Groundwater was <br />' carefully poured into laboratory-supplied 1-liter amber bottles and into acidified <br /> 40ml vials for volatile organic compounds and fuel oxygenates <br /> The groundwater grab samples were capped, labeled and placed in an ice-chest in <br />' preparation for transport under chain-of-custody to McCampbell Laboratory, a State <br /> Certified Laboratory located in Pacheco, California A trip blank was included with <br /> the samples to provide a quality control check on the sample-handling procedures <br /> to ensure that cross-contamination would be detected if it occurred between the <br /> sample containers during transport to the laboratory <br />' 2.3 Backfill and Surface Restoration <br />' The probe holes were back filled by tremie from the bottom of the hole The tremae <br /> pipe was raised in increments as Portland Cement (5 gallons per bag mix) was <br />' placed to the base of the probe hole The ground surface was restored with fast- <br /> setting concrete <br /> RAS Consulting <br /> 4 <br />