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Stantec <br /> L & M OPERABLE UNIT- FOURTH QUARTER AND ANNUAL 2010 SITE STATUS, <br /> REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT <br /> Annual Summary of Remediation -2010 <br /> January 31, 2011 <br /> 6.3 SVE SYSTEM OPERATIONAL AND ANALYTICAL SUMMARY- 2010 <br /> During 2010 (December 9, 2009 to December 14, 2010), the SVE system was 89% operational <br /> (330 out of 370 days). The system was intermittently shut down for repairs between August 30th <br /> and October 7th. The system removed approximately 97 pounds (15.9 gallons) of TPHg from <br /> soil vapor beneath the L&M OU (below). No measurable amount of benzene or MtBE was <br /> detected or removed from soil vapor beneath the L&M OU during the year. <br /> Hour TPHg Benzene MtBE <br /> Meter Cumulative Cumulative Cumulative <br /> Date Reading Recovery Recovery Recovery <br /> Sampled (hours) (Ibs) (Ibs) (Ibs) <br /> 12/9/2009 16,296.3 2,220 0.14 0.00 <br /> 1/12/2010 17,108.7 2,220 0.14 0.00 <br /> 2/4/2010 17,631.0 2,220 0.14 0.00 <br /> 3/2/2010 18,254.0 2,220 0.14 0.00 <br /> 4/7/2010 19,028.6 2,220 0.14 0.00 <br /> 5/12/2010 19,686.2 2,243 0.14 0.00 <br /> 6/10/2010 20,382.2 2,243 0.14 0.00 <br /> 7/12/2010 21,149.2 2,243 0.14 0.00 <br /> 8/4/2010 21,703.9 2,243 0.14 0.00 <br /> 9/15/2010 22,327.8 2,308 0.14 0.00 <br /> 10/7/2010 22,590.5 2,317 0.14 0.00 <br /> 11/17/2010 23,550.7 2,317 0.14 0.00 <br /> 12/14/2010 24,221.1 2,317 0.14 0.00 <br /> REPORTING PERIOD: December 9,2009 to December 14,2010 <br /> Period Days: 370 <br /> Period Operational Days: 330 <br /> Period Pounds TPHg Removed: 97.0 <br /> Period Pounds Benzene Removed : 0.0 <br /> Period Pounds MtBE Removed: 0.0 <br /> 6.4 2010 REMEDIATION SUMMARY <br /> The DPE, ASVE, and SVE remediation systems continued to remove appreciable quantities of <br /> TPHg, TPHd, and TPHo from soil vapor and groundwater while in operation at the site during <br /> 2010. Benzene and MtBE influent concentrations remained below laboratory reporting limits in <br /> all samples collected during 2010; consequently no measurable amount of benzene or MtBE <br /> was removed by any of the systems during the year. <br /> I:\Tidewater\TW Stockton(Parcel 2A-0415)\Reports\QMR\2010\4010-Annual\4Q10 and Annual OSSRQRSRQMR Stockton_FINAL.doc 6.4 <br />