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CAMBRIA <br /> Drilling Company Gregg Drilling & Testing, Inc of Martinez, California (C57 <br /> License No 485165) <br /> Drilling Dates November 8 and 9, 2000, April 1 I through 13, and <br /> April 16, 2001 <br /> Drilling Methods 6-inch, 8-inch, and 10-inch hollow-stem augers (HSA) and cone <br /> penetration testing(CPT) equipment <br /> Number of Borings One CPT boring and eight HSA soil borings Two of the HSA <br /> borings were converted into groundwater monitoring wells <br /> (MW-6 and MW-8) One of the HSA borings was set with <br /> galvanized metal casing and subsequently advanced to the total <br /> depth using CPT equipment (CPT-2) Boring and well <br /> specifications are described in Table I and the locations are <br /> shown on Figure 2 <br /> i <br /> Boring Depths Well borings MW-6 and MW-8 to 65 and 69 fbg, respectively, <br /> CPT borings CPT-1 and CPT-2 to 100 06 and 92 fbg, <br /> respectively Soil borings SB-5 and SB-7 through SB-9 to <br /> 41 5 fbg and soil boring SB-6 to 40 fbg <br /> Groundwater Depths During drilling activities, first encountered groundwater was <br /> observed in borings MW-6 and MW-8 at depths of 57 5 and <br /> 59 fbg, respectively Groundwater depth was calculated at <br /> 60 fbg in boring CPT-1 using a pore pressure dissipation test <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California <br /> measured groundwater in wells MW-5, MW-6, and MW-8 at <br /> depths ranging from 55 35 to 55 96 fbg on March 16, 2001 <br /> Soil Sampling Methods Soil from boring CPT-1 was logged continuously using CPT <br /> electronic logging equipment No soil samples were collected <br /> from this boring Boring CPT-2 was not logged, and one soil <br /> sample was collected at 84 fbg for chemical analysis The HSA <br /> borings were logged using the Unified Soil Classification <br /> • System and Munsell Soil Color Charts Encountered soils from <br /> 1346 3 <br />