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Second Quarter 2006 Groundwater Monitoring and Remediation Status Report <br /> Cohn Property,3755 Munford Avenue,Stockton,California <br /> Page 4 <br /> Analysis Performed: <br /> Anal sis Abbreviation Designation I USEPA Method No <br /> Total Petroleum Hydrocarbons TPH Fuel-Range 8015M <br /> as Gasoline 9 H drocart ons <br /> Benzene Aromatic <br /> Toluene BTEX Volatile <br /> Eth Ibenzene Organics <br /> Xylenes(Total) <br /> Tertiary Butyl Alcohol TBA 8260B <br /> Methyl Tertiary Butyl Ether MTBE Five Fuel <br /> Di-isopropyl Ether DIPS <br /> Ethyl TertiaryButyl Ether ETBE Oxygenates and <br /> Tertia Amyl Methyl Ether. TAME Ethanol <br /> Ethanol <br /> Modifications from Standard Monitoring Program: <br /> Well MW-13 was not sampled due to problems encountered during well development activities -Th,, <br /> The well will be redeveloped and sampled during the next quarterly monitoring event s4�rG <br /> REMEDIATION SYSTEM SUMMARY <br /> rrt � � <br /> Soil Vapor Extraction System Description: -26,f4 Cz</ <br /> R. I IL <br /> The remediation system is a 250 standard cubic feet per minute (SCFM), soil vapor extraction s�1v <br /> (SVE) system with a thermal/catalytic oxidizer as an emission control unit A 7 5 horsepower <br /> (hp), positive displacement blower extracts soil vapors from the subsurface at a maximum <br /> vacuum of 12"of mercury(Hg) The system is currently operating in thermal mode and utilizing <br /> three vapor extraction wells, VEW-1, VEW-2 and VEW-3 The emission control operates at a <br /> maximum of 0 5 million British Thermal Units (BTUs) per hour The trailer mounted SVE <br /> system is manufactured by Solleco Environmental Equipment of Anaheim, California The SVE <br /> system and control device are permitted with the SJVAPCD and operating under the "Authority <br /> to Construct" number,N-5817-1-0 <br /> System startup date: September 2, 2005 <br /> Current system mode: Thermal operation since startup <br /> Active extraction wells: VEW-1, VEW-2 and VEW-3 <br /> Inactive extraction wells/reason: None <br />