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rI 11 <br /> 0 C A M B R I A <br /> Onsite Abandoned Water Well. On August 7, 2002 the abandoned water supply well at the <br /> subject site was redeveloped and video logged Gregg Drilling and Testing, Inc of Martinez, <br /> California was on site to redevelop the well Well redevelopment consisted of bailing, surge- <br /> blocking, and purging the water from the well Approximately 550 gallons of water was <br /> removed from the well dunng development activities This water was pumped into a vacuum <br /> truck which was onsite that day to perform GWE from well MW-IA <br /> Water Well Technology, Inc of Fair Oaks, California provided the video logging services <br /> During video logging activities the well was found to be approximately 115 feet deep <br /> Groundwater was encountered in the well at seven feet below grade (fbg) The well casing is <br /> steel and six inches in diameter Perforations in the casing consisted of vertical slots between <br /> 107 and 115 fbg The video log report is included in Appendix C <br /> Cambria discussed how this well should be destroyed with San Joaquin County Environmental <br /> Health Department (EHD) EHD is requesting the steel casing be perforated prior to pressure <br /> grouting the well Cambria will contact driller companies to determine the appropriate method <br /> for perforating this well Once we have selected a drilling company to destroy the well we will <br /> submit an application to EHD for destruction of this well <br /> ANTICIPATED FOURTH QUARTER 2002 ACTIVITIES <br /> Groundwater Monitoring- Blaine will gauge and sample the site wells according to the existing <br /> sampling schedule and tabulate the data Cambria will prepare a groundwater monitoring report <br /> Groundwater Remediation. GWE from well MW-1A will continue <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Only well MW-lA reported MTBE at a concentration of 1,400�tgIL, which remains significantly <br /> reduced from MTBE concentrations reported in the first quarter of 2002 It appears that periodic <br /> GWE continues to reduce MTBE concentrations in well MW-1A, in addition to the tank backfill <br /> Groundwater flow direction was to the northeast this quarter, as is typical for the site <br /> 0813 2 <br />