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1 <br /> REMEDIATION SYSTEM STATUS <br /> The site groundwater remediation system consists of soil vapor extraction (SVE) wells, from <br /> which soil vapors are extracted using a Catalytic Oxidizer Start up of the remediation system <br /> occurred on February 3, 2000, under the supervision of regulatory personnel The remediation <br /> system was shut-down on October 1, 2004, due to fiscal constraints and has remained off since that <br /> time The County of San Joaquin was notified about the shut-down <br /> Sampling Results <br /> No vapor samples were collected <br /> System Performance Status <br /> The treatment system did not operate during the reporting period <br /> Remediation System Performance Summary <br /> ry <br /> TPHg removed since February 3,2000 startup(estimate) 3,244 lbs <br /> TPHg removed during this reporting period 0 lbs <br />' TPHg daily removal rate during reporting period 0 Ibs/d <br /> TPHg destruction efficiency 0% <br /> TPHg emission rate to atmosphere 0 Ibsld <br /> Benzene removed since startup(estimate) 4 9 lbs <br /> Benzene removed during this reporting period 0 lbs <br /> Benzene Destruction Efficiency 0% <br /> Benzene emission rate to atmosphere 0 Ibsld <br /> IAverage flow rate for this reporting period 0 SCFM <br /> System uptime during this reporting period None <br />�I <br /> CONCLUSIONS <br /> Analytical results for groundwater samples collected from the site were generally consistent with <br /> previous sampling events Measured groundwater elevations increased between 1 95 and 2 18 feet <br /> from the February 7, 2005, sampling event The groundwater elevations during the second quarter <br /> 2005 indicated a generally eastward direction of flow Graphs showing TPHg and benzene <br /> concentrations, and groundwater elevations versus time in wells MW-1R, VW-2, and VW-3 are <br /> presented in Appendix D <br /> The SVE system was temporarily shut down on October 1, 2004 and has yet to be restarted <br /> Shaw will continue to perform quarterly groundwater sampling The next sampling event is <br /> tentatively scheduled for August 2005 <br />' N\sac DM00S1PrjN88 800391 A Sag dor. 3 SHAW ENVIRONMENTAL,INC <br />