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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 /> 3.0 Status of Remediation Activities <br /> 3.1 DUAL PHASE EXTRACTION SYSTEM <br /> 3.1.1 Dual Phase Extraction Systems Summary <br /> The dual phase extraction (DPE) system consists of groundwater extraction (GWE) and soil <br /> vapor extraction (SVE) and utilizes wells DPE-1 through DPE-13, and 2AMW-14, a 100-gallon <br /> liquid/vapor separator, and a Solleco 400- standard cubic feet per minute (scfm) thermal <br /> oxidizer with a Travaini TRO 400s 25-hp liquid ring pump. <br /> From March 18, 2004 through April 4, 2004, the system was operated to conduct source tests <br /> for the San Joaquin Valley Air Pollution Control District (SJVAPCD) and the collection of effluent <br /> Polycyclic Aromatic Hydrocarbon (PAH) sampling under Authority to Construct (ATC) number <br /> N-4878-1-1. On July 7, 2004, the SJVAPCD issued a new ATC number (N-4878-1-2) for <br /> permanent operation of the system. The system was re-started on August 2 and 3, 2004 for <br /> collection of PAH samples. Following PAH sample collection; the system was shut down until <br /> Site excavation activities were completed. Continuous operation of the DPE system was <br /> re-commenced on December 14, 2004. On June 22, 2005, SJVAPCD issued a Permit to <br /> Operate (PTO) number (N-4878). On September 8, 2006, SJVAPCD issued a PTO number <br /> (N-4878-1-3) that excluded further sampling of PAH. <br /> 3.1.2 Dual Phase Extraction System: Operational and Analytical Data — 3Q13 <br /> Operation of the DPE system is conducted periodically to capture product that seeps into the <br /> DPE wells. The vapor component of the DPE system was not operated continuously during <br /> 3013 (June 25, 2013 to September 26, 2013). The groundwater portion of the DPE system <br /> remained operational and processed approximately 56,795 gallons of water originating from <br /> system operation during compliance sampling events, rainwater, knock-out water, and purge <br /> water that was collected during site monitoring and sampling. <br /> During 3Q13 the DPE system (GWE and SVE combined) removed approximately 0.47 lbs. <br /> (0.08 gallons) of TPHg, 3.05 lbs. (0.42 gallons) of TPHd, 1.20 lbs. (0.16 gallons) of TPHo, and <br /> 0.04 lbs. (0.01 gallons) of benzene. No appreciable amount of MTBE, or TBA was removed <br /> from the subsurface by the DPE system during 3Q13. <br /> Historically the DPE system (GWE and SVE combined) has removed approximately 18,124 lbs. <br /> (2,971 gallons) of TPHg, 9,580 lbs. (1,334 gallons) of TPHd, 5,153 lbs. (676 gallons) of TPHo, <br /> 13.40 lbs. (1.81 gallons) of benzene, 3.77 lbs. (0.61 gallons) of MTBE, and 0.58 lbs. (0.09 <br /> gallons) of TBA from water and soil vapor to date. Since system start-up groundwater <br /> extraction has removed and treated approximately 7,287,285 gallons of water. <br /> 5 5ta ntec 3.1 <br />