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r! �y <br /> First Quarter 2006 Groundwater Monitoring and Remediation Status Report <br /> Cohn Property,3755 Munford Avenue,Stockton,California <br /> Page 4 <br /> Analysis Performed: <br /> Anal sls Abbreviation Designation I USEPA Method No <br /> Total Petroleum Hydrocarbons TPH Fuel-Range g015M <br /> as Gasoline g Hydrocarbons <br /> Benzene Aromatic <br /> Toluene BTEX Volatile <br /> Eth (benzene <br /> X lenes (Total) Organics <br /> Tertiary Butyl Alcohol TBA 82608 <br /> Methyl Tertiaa Butyl Ether MTBE Five Fuel <br /> Di-isopropyl Ether DIPE Oxygenates and <br /> Ethyl Terga Buty] Ether ETBE Ethanol <br /> Tertiary Amyl Methyl Ether TAME <br /> Ethanol <br /> 4156 ftlld�4Xhlf 4_%F& &A %510'* le * vsax <br /> Modifications from Standard Monitorin Kogram <br /> Well MW-13 was not sampled due to problems encountered during well development activities <br /> The well will be redeveloped and sampled during the next quarterly monitoring event <br /> . REMEDIATION SYSTEM SUMMARY <br /> Soil Vapor Extraction System Description <br /> The remediation system is a 250 standard cubic feet per minute (SCFM), soil vapor extraction <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 />