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C A M B R I A <br /> laboratory report for the required samples taken on December 6, 2004 is presented in Appendix A <br /> Monthly Flow Data Between December 6 and December 27,2004,the total discharge to the sanitary <br /> sewer was 23,893 gallons, which corresponds to an average flow rate of 0 79 gallons per minute <br /> Discussion Aqua Sierra Controls, Inc calibrated the LEL meter on December 27, 2004 The <br /> calibration certificate is included as Appendix B The GYVE system was shut down on <br /> December 14, 2004,in anticipation of carbon replacement Carbon replacement activities commenced <br /> on December 27,2004,but could not be completed because water service is no longer available from <br /> the abandoned station building The GYVE system will remain off until water service is resumed and <br /> carbon replacement activities are completed <br /> CLOSING <br /> The signed certification statement is included as Appendix C Thank you for your assistance with this <br /> project Please call Cynthia Vasko at(510) 420-3344 if you have any questions <br /> Sincerely, <br /> Cambria Environmental Technology, Inc <br /> Cynthia Vasko <br /> Senior Staff Engineer <br /> Attachments <br /> Table 1 Groundwater Extraction System Permit Sampling Results <br /> Appendix A Groundwater Extraction System Certified Analytical Report <br /> Appendix B LEL Meter Calibration Certificate <br /> Appendix C Certification Statement <br /> cc Karen Petryna, Shell Oil Products US <br /> Mike Infurna, San Joaquin County Environmental Health Department <br /> 0783 2 <br />