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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 /> DPE System 2012 Analytical Summary-Soil Vapor Extraction <br /> The SVE component of the DPE system removed approximately 16.3 lbs. of TPHg, 0.12 lbs. of <br /> benzene, and 0.06 lbs. amount of MtBE (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 5,082 <br /> 1/19/2012 5,082 <br /> 2/28/2012 5,082 <br /> 3/16/2012 5,082 <br /> 4/20/2012 5,091 <br /> 5/8/2012 5,098 0.5 0.00 0.00 <br /> 6/22/2012 5,745 9.2 0.09 0.05 <br /> 7/12/2012 5,748 <br /> 8/15/2012 5,748 0.0 0.00 0.00 <br /> 9/21/2012 5,913 5.4 0.03 0.01 <br /> 10/19/2012 5,921 0.2 0.00 0.00 <br /> 11/28/2012 5,924 0.0 0.00 0.00 <br /> 12/21/2012 5,961 1.0 0.00 0.00 <br /> Period Days: 372 <br /> Period Operating Days: 36.6 <br /> Period Percent Operational: 56% <br /> Period Pounds of TPHg Removed: 16.3 <br /> Period Pounds of Benzene Removed: 0.12 <br /> Period Pounds of MtBE Removed: 0.06 <br /> 6.1.3 SPH Removal Summary -2012 <br /> The DPE Non-aqueous Extraction Technique (NET) free product removal system and periodic <br /> extraction from monitoring wells have removed approximately 25.4 gallons of SPH from <br /> groundwater beneath the Site during quarterly visits between January 12, 2012 and October 11, <br /> 2012 (below). <br /> NET <br /> NET System TPE TPE SPH SPH <br /> System Cumulative Cumulative Cumulative Extraction Extraction Total <br /> Period SPH SPH SPH SPH Period Cumulative SPH <br /> Recovery Recovery Recovery Recovery Recovery Recovery Recovery <br /> Date Notes (gallons) (gallons) (gallons) (gallons) (gallons) (gallons) (gallons) <br /> 1/12/2012 1,575 6.4 185.8 1,777.2 <br /> 4/12/2012 1,575 5.6 191.3 1,782.7 <br /> 7/12/2012 1,575 6.2 197.5 1,788.9 <br /> 10/11/2012 1,575 7.2 204.7 1,796.1 <br /> Total Gallons SPH Recovered During 2012: 25.4 <br /> I:\Tidewater\TW Stockton(P2A)\QMRs\2012\4Q12-Ann ual\4Q12 and Annual QSSR QRSR QMR Stockton_FINAL.doc 6.3 <br />