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3.9 Groundwater Analytical Results <br /> No analytes were detected in any of the groundwater samples Analytical results are summarized <br /> ' in Table 2 and depicted in Figure 4 A copy of the laboratory report is included in Appendix B <br /> 4.0 Disposal of Purge Water <br /> — <br /> A total of 16 6 gallons of well development water were generated during the October 27, 2003 <br />' groundwater sampling event The water generated was removed from the SBC facility and <br /> transported to Shaw's facility in Sacramento, California for storage pending off-site disposal <br /> 5.0 Conclusions <br /> Based on the field observations and laboratory analytical data presented in this report, Shaw <br /> concludes the following <br />' The average measured depth to groundwater was 10 89 feet bsg, with an average <br /> groundwater surface elevation of 38 66 feet above msl <br /> • The groundwater gradient was estimated to the north at approximately 0 004 foot <br /> per foot <br /> • No analytes were detected in any �" samples of the groundwater les collected from wells <br /> p <br /> MW-1, MW-2, and MW-3 <br /> • No analytes were detected in the previous groundwater monitoring event <br /> conducted in July 2003 <br /> • Based on these results, Shaw recommends that the site be granted case closure <br /> and the monitoring wells properly destroyed <br /> 6.0 References <br />' IT Corporation (IT, 2002a), Underground Storage Tank Removal Report, Pacific Bell Facthty, <br /> 10 East 12th Street, Tracy, California, April 2002 <br />' IT Corporation (IT, 2002b), Underground Storage Tank Removal Report, Pacific Bell Facility, <br /> 10 East 12th Street, Tracy, California, May 2002 <br />' IT Corporation (IT, 2002c), Additional Site Assessment Activities Report, Pacific Bell Facility, <br /> 10 East 12th Street, Tracy, California, November 2002 <br /> CNCD/O SHARFJUST103-0183 doc <br /> 4 <br />