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C150) The cement was pumped into the bore hole using a tremmie pipe as the augers <br /> were extracted <br /> 23 Subsurface Soil Sampling <br /> Soil samples were obtained at 5 foot intervals using an 18-inch long California split <br /> spoon sampler The sampler was lowered through the hollow stem auger to the bottom <br /> of the bore hole A 140-pound slide hammer with an 18-inch drop was used to advance <br /> the split spoon sampler through the soil and collect the samples The samples were <br /> collected in 6-inch brass tubes, sealed with teflon tape and plastic end caps, then <br /> preserved on ice and transported to the laboratory for analysis <br /> The intermediate section of the sampler was described (logged) by the CEMI geologist <br /> Descriptions consisted of lithology, color, grain size, mineralogy, odor, and other <br /> properties that may be of value in determining soil structures and the presence or <br /> absence of petroleum hydrocarbons Please refer to Soil Boring Logs (Appendix B) <br /> The soil samples were screened on-site for organic vapors (headspace) with a Foxboro <br /> 128 Flame-Ionization Detector (FID), calibrated to a hexane standard The FID field <br /> screening was conducted by placing a portion of the soil sample in a sealed plastic bag, <br /> allowing approximately ten (10) minutes for volatilization of organic vapors, and then <br /> inserting the FID probe into the bag for a reading The readings were then recorded on <br /> K084023 RPT 10 <br />