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I <br /> I <br /> Sampling Protocol <br /> Drilling <br /> Peimits were obtained for the bonngs before the drilling began The soil borings were <br /> accomplished using a mobile mounted drilling ng employing the use of a hollow stem <br /> flight auger no less than 3-114 incl i d and 8-718 inch o d <br /> All drilling equipment was thoroughly steam cleaned before; drilling began, to prevent <br /> the introduction of contamination from off site, and between bonngs to prevent cross <br /> contamination <br /> The bonngs were logged under the direct supervision of a registered geologist, using <br /> the Unified Soil Classification System (Appendix A) The color, texture, moisture, <br /> plasticity (if applicable), consistency of the earth materials, blow counts, pertinent soil <br /> or bedrock characteristics, and any evidence of contamination were noted All water- <br /> bearing. zones and the depths at which they were encountered were noted on these logs <br />' All borings were drilled in such a manner as to prevent cross contamination between <br /> strata The borings were terminated with a cement and three percent (%) Bentonite <br /> mixture after hole plug was placed to the bottom of the bonngs <br /> Soil Sampling <br />' All soil sampling equipment was thoroughly steam cleaned before and between samp- <br /> ling to prevent cross contamination Relatively undisturbed soil samples were taken at <br /> intervals of not more than five feet (5') in order to evaluate the subsurface materials <br /> The soil samples were taken using a wire line and a California Modified Split Spoon <br /> sampler with brass liners The sampler was driven continuously by a wire line hammer <br /> have heads ace and were immediate/ <br /> The laboratory samples did not p y sealed in their <br />' liners using aluminum foil lined plastic caps The remaining sample was removed from <br /> its liner and used as an aide to the on-site geologist in logging the material at that <br /> depth <br />' Soil samples collected for analysis were analyzed using EPA method 8020 for BTX&E <br /> compounds and EPA method 5030/LUFT for gasoline The minimum detection limits <br />' used for each analyte was 5 0 µg/kg for BTX&E and 2 5 mg/kg for gasoline The State <br /> certified laboratory analyzing the soil samples was F_xelchem Laboratories, Inc , <br /> located in Citrus Heights, California <br /> I <br /> I <br />