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L & M OPERABLE UNIT-THIRD QUARTER 2013 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Status of Remediation Activities <br /> November 1, 2013 <br /> Historical DPE system operations and analytical data are presented in Table 8 through Table <br /> 13. Chemical concentrations and mass removal graphs are presented on Figure 31 through <br /> Figure 34. Analytical lab reports and field data sheets for all O&M activities are presented in <br /> Appendix 1. <br /> 3.2 L&M OU AND APARTMENT SOIL VAPOR EXTRACTION SYSTEMS <br /> 3.2.1 L&M OU and Apartment Soil Vapor Extraction Systems Summary <br /> The L&M OU SVE (SVE) and Apartment SVE (ASVE) systems have been operational since <br /> May 31, 2007. The SVE system is comprised of horizontal vapor wells: SVE-1 through SVE-11, <br /> a 100-gallon liquid/vapor separator, and a Solleco 500 cfm vapor extraction system with a Roots <br /> URAI 59 20-hp positive displacement blower. The ASVE system is comprised of horizontal wells <br /> (ASVE-1 through ASVE-6), a 100-gallon liquid/vapor separator, and a Solleco 250 cubic feet per <br /> minute (cfm) vapor extraction system with a Roots URAI 56 10-hp positive displacement blower. <br /> Vapor from both the SVE and the ASVE systems is abated with a 750 scfm thermal oxidizer. <br /> Since May 31, 2007 the 750 scfm SVE and ASVE vapor abatement system has been operated <br /> under SJVAPCD permit number N-4878-2-0. <br /> 3.2.2 L&M OU and Apartment Soil Vapor Extraction Systems Operational Data — 3Q13 <br /> During 3Q13 (June 25, 2013 to September 26, 2013) the SVE and the ASVE systems were <br /> approximately 92% operational (85 out of 93 days). The systems were found down on arrival on <br /> September 26, 2013 due to an air pressure alarm. The alarm was cleared and the systems <br /> were inspected for issues prior to being restarted. The systems operated without incident for <br /> the remainder of the quarter. <br /> 3.2.3 Apartment Soil Vapor Extraction System Analytical Data — 3Q13 <br /> During 3Q13 (June 25, 2013 to September 26, 2013) the ASVE system removed approximately <br /> 9.4 lbs. (1.5 gallons) of TPHg, 0.08 lbs. (0.01 gallons) of benzene, and 0.17 lbs. (0.03 gallons) <br /> of MTBE from the subsurface. To date the ASVE system has removed approximately 2,787.6 <br /> lbs. (457.0 gallons) of TPHg, 10.19 lbs. (1.42 gallons) of TPHd, 3.15 lbs. (0.43 gallons) of <br /> benzene, and 6.69 lbs. (1.08 gallons) of MTBE from soil vapor beneath the Delta View <br /> Apartments. Historical ASVE system operations and analytical data are presented in Table 16 <br /> through Table 18. <br /> 3.2.4 L&M OU Soil Vapor Extraction System Analytical Data — 3Q13 <br /> During 3Q13 (June 25, 2013 to September 26, 2013) the SVE system removed approximately <br /> 151 lbs. (24.7 gallons) of TPHg, 0.14 lbs. (0.02 gallons) of benzene, and 0.31 lbs. (0.05 gallons) <br /> of MTBE from the subsurface. To date the SVE system has removed approximately 4,884 lbs. <br /> (801 gallons) of TPHg, 5.17 lbs. (0.72 gallons) of TPHd, 3.86 lbs. (0.53 gallons) of benzene, and <br /> 5tantec 3.2 <br />