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0 C A M B R I A <br /> INVESTIGATION RESULTS <br /> Personnel Present. Geologist Scott Lewis and Tom Magney directed the field <br /> sampling, working under the supervision of California <br /> Registered Geologist Joe Neely <br /> Permit Two drilling permits were obtained from SJCPHS/EHD One <br /> permit for the onsite borings, and one permit for the offsite <br /> borings <br /> Drilling Company Gregg In Situ, Inc of Martinez, California (C57 License <br /> No 656407) <br /> Drilling Dates November I through 3, and November 8 and 9, 2000 <br /> Drilling Method Cone penetration testing (CPT) <br /> . Sampling Methods Soil lithology was continuously logged using CPT equipment <br /> Encountered lithology is described on the CPT plots presented <br /> in Appendix A Soil samples from the borings were collected <br /> at approximately ten-foot intervals for potential chemical <br /> and headspace analyses Groundwater samples were collected <br /> for chemical analyses using Hydropunch equipment where <br /> CPT logs indicated water-bearing soils occurred The water <br /> sampling equipment could not be advanced below 75 feet in <br /> boring CPT-4 due to the high density of the soil encountered <br /> Number of Borings Four soil borings (CPT-I through CPT-4) Boring <br /> specifications are described in Table 1 and locations are shown <br /> on Figure 2 <br /> Boring Depths The CPT-I through CPT-3 were drilled to 100 fbg Boring <br /> CPT-4 encountered refusal at 81 fbg <br /> Groundwater Depths During drilling activities, pore pressure dissipation tests <br /> indicated groundwater depths in the borings ranged from <br /> approximately 19 5 to 22 fbg <br /> 1• <br /> 1399 3 <br />