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Spectrum Exploration Inc drilled the soil borings All of the drilling equipment was <br /> decontaminated prior to mobilization to the site. No underground utilities were encountered <br /> ' during drilling. Soil cuttings were stored in a 10 yard roll-off bin provided by Delta <br /> Container Corporation <br /> Argon Laboratories, a DHS certified laboratory, set up a mobile laboratory to perform on-site <br /> ' sample analyses. <br /> A tailgate health and safety meeting was held pnor to the commencement of site activities. <br /> Modified level D personal protective equipment was used during the field activities, pursuant <br /> to the site-specific health and safety plan (HASP). <br /> 2.2.2 Soll Boring Installation <br /> ' Two soil borings SB-1 and SB-2 (Figure 2) were drilled using a CMI&75 hollow-stem auger <br /> ng. The soil borings were drilled using a continuous core sampling barrel for hthologic <br /> ' characterization and collection of chemical and bioassessment samples In addition, relatively <br /> undisturbed soil samples were collected for geotechnical testing from boring SB-1 using a 140 <br /> lb. slide hammer attached to a California modified split-spoon sampler. Both SB-1 and SB-2 <br /> rwere drilled to total depths of 64.5 feet below ground surface (bgs) without encountering <br /> water. The soil borings were logged using the Unified Soil Classification System <br /> ' (Appendix B) Based on the results obtained from the mobile laboratory, proposed soil <br /> borings SB-3 and SB-4 were not drilled. <br /> ' w completed, the boreholes were abandoned in accordance with State and <br /> After the borings were co p ted, <br /> County guidelines A grout mixture (Type I/H Portland cement with a three to five percent <br /> bentonite-clay mixed and six to eight gallons of water per sack of cement) was used to <br /> ' abandon each boring. The grout mixture was fed into each borehole through a tremae hose as <br /> the augers were pulled from the borehole. Additional grout was placed in each borehole after <br /> settlement occurred to ensure that each borehole was finished to grade. <br /> 2.2.21 Soll Sampling and Chemical Analyses <br /> Sampling depths were selected in order to characterize current chemical conditions in the <br /> vadose zone, and verify previously reported analytical data. Samples were collected at the <br /> following depths in each soil boring- 10, 15, 20, 25, 30, 40, 50, and 64 feet, respectively. <br /> Mz111-20-95/VDBF/95.OM7 3 <br />