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Stantec <br /> L & M OPERABLE UNIT- FOURTH QUARTER AND ANNUAL 2012 SITE STATUS, <br /> REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT <br /> Annual Summary of Remediation-2012 <br /> February 1, 2013 <br /> 6.3 SVE SYSTEM OPERATIONAL AND ANALYTICAL SUMMARY- 2012 <br /> During 2012 (December 15, 2011 to December 21, 2012), the SVE system was 66% <br /> operational (245.6 out of 372 days). The system is periodically shut down to accommodate <br /> quarterly site monitoring and sampling. The system was found down on arrival on March 30, <br /> 2012 and June 22, 2012 due to a high level alarm in the oil/water separator. The system was <br /> shut down on August 10, 2012 to accommodate a carbon change out event for the DPE system. <br /> On December 7, 2012 the SVE system was found down on arrival. Upon attempted restart it <br /> was discovered that the combustion blower was malfunctioning. On December 21, 2012 the <br /> combustion blower motor was removed and brought to a motor shop for repair. The motor will <br /> be repaired, reinstalled, and the system restarted during January 2013. <br /> During 2012, the SVE system removed approximately 359.1 lbs. of TPHg, 0.44 lbs. of benzene, <br /> and 1.03 lbs. of MtBE from soil vapor beneath the L&M OU (below). <br /> Approximate Approximate Approximate <br /> Hour TPHg Benzene MtBE <br /> Meter Recovery Recovery Recovery <br /> Date Reading 2012 2012 2012 <br /> Sampled (hours) (lbs.) (lbs.) (lbs.) <br /> 12/15/2011 31,553.5 -- -- -- <br /> 1/19/2012 32,392.9 24.0 0.02 0.04 <br /> 2/28/2012 33,352.3 19.9 0.02 0.05 <br /> 3/16/2012 33,762.1 11.5 0.01 0.02 <br /> 4/20/2012 34,176.9 74.9 0.03 0.07 <br /> 5/8/2012 34,605.9 106.7 0.06 0.14 <br /> 6/22/2012 34,830.7 26.1 0.03 0.08 <br /> 7/12/2012 35,309.2 56.7 0.07 0.17 <br /> 8/15/2012 35,579.6 5.4 0.04 0.10 <br /> 9/21/2012 36,230.8 9.3 0.08 0.17 <br /> 10/19/2012 36,548.1 7.5 0.02 0.06 <br /> 11/28/2012 37,389.8 17.1 0.06 0.13 <br /> 12/21/2012 37,447.1 -- -- -- <br /> Reporting Period: December 15,2011 to December 21,2012 <br /> Days in Period: 372 <br /> Days Operational in Period: 245.6 <br /> Period Pounds TPHg Removed: 359.1 <br /> Period Pounds Benzene Removed: 0.44 <br /> Period Pounds MtBE Removed: 1.03 <br /> I:\Tidewater\TW Stockton(P2A)\QMRs\2012\4Q12-Annual\4Q12 and Annual QSSR QRSR QMR Stockton_FINAL.doc 6.5 <br />