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0 • <br /> Mr Michael Infurna, SJCEHD June 17,2005 <br /> Site Investigation Work Plan <br /> Palisades Station No 835, Stockton, CA <br /> Page 6 <br /> • Advance seven (7) cone penetrometer test (CPT) borings (CPT-1 through CPT- <br /> 7) to a depth of approximately 80 feet bgs <br /> • Collect depth discrete soil and groundwater samples immediately adjacent to <br /> each CPT boring location <br /> The proposed scope of work has been subdivided into tasks 1 through 4 Details are <br /> provided for the activities associated with each task All geologic work will be conducted <br /> under the direct supervision of a State of California Registered Geologist or Civil <br /> Engineer and will be conducted in accordance with standards established by the <br /> California Regional Water Quality Control Board (RWQCB, Recommendations for <br /> Preliminary Investigation and Evaluation of Underground Tank Sites, April 2004) and <br /> SJCEHD guidelines A California-licensed C-57 well driller will perform all soil boring <br /> activities A copy of Stratus' field practices and procedures that will be utilized during <br /> this work is provided in Appendix A <br /> Task 1 Pre-field Activities <br /> Following approval of this Work Plan by SJCEHD personnel, the following activities <br /> will be completed <br /> • Obtain soil boring permits from SJCEHD, <br /> • Retain and schedule a licensed C-57 drilling contactor, <br /> • Prepare a health and safety plan for the site, <br /> • Mark boring locations and contact Underground Service Alert to locate <br /> underground utilities in the vicinity of the work site, and <br /> • Notify SJCEHD and Palisades of the scheduled field activities <br /> Task 2: Field Activities <br /> CPT Borings and Soil and Groundwater Sampling <br /> Stratus will oversee a California licensed drilling contractor advance seven CPT borings <br /> to an approximate depth of 80 feet bgs The proposed locations of the borings are shown <br /> on Figure 3 The actual locations of the borings will be based on accessibility and the <br /> location of underground utilities <br /> The CPT consists of advancing a cone-tipped cylindrical probe (1 7 inches in diameter) <br /> into the ground while simultaneously measuring the resulting resistance to penetration A <br /> computer generated CPT log is plotted in the field, providing a continuous log of site <br /> lithology Upon completion of sampling, the CPT holes will be pressure grouted from the <br /> bottom of the borehole up to surface grade <br /> K\USA Gasohn60835\Work Plans\pahsades835 workplan 06-17-05 doc STRATUS <br />