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CHAPIN BROTHERS, INC. May 25, 1995 Page 4 water, Two passive product skimmers will be installed in monitoring wells MWX and MW2 to remove free product present in ground water. Miscellaneous equipment will Consist of flow meters, vacuum, pressure and temperature gauges, valves, a water-knockout tank, high temperature and water level automatic shut-off switches and sample ports. The vapor extraction and air sparging equipment will be placed inside an enclosure contained within a six-foot-high chain link fence with redwood slats. Complete system design and construction drawings for the vapor extraction and air sparging systems will be prepared for permitting and construction purposes. We will procure all necessary equipment and materials for a fully operational air sparging system, We will coordinate and supervise the installation of the treatment system. System installation activities will take approximately one week to complete. Afar the SIVUAPCD authority to construct and building permit are obtained the air sparging wells and vapor extraction wells will be connected to the air sparging blower and internal combustion engine, respectively, via underground piping. We will procure all necessary equipment and materials for fully operational vapor extraction and air sparging treatment systems. We will coordinate and supervise the installation of the treatment systems. System installation activities will take approximately one to two weeks to complete. After the SJVUAPCD permit to operate is obtained, the treatment systems will be started, Measurements will be taken from the internal combustion engine to determine the influent and effluent gas flow rates. Influent and effluent air samples will be collected before and after the emissions control device. The air samples will be submitted to a California-certified laboratory for analysis of Total Petrolewn Hydrocarbons (TPH) as gasoline using Modified EPA Method 8015 and Benzene, Toluene, Ethylbenzene, and Total Xylenes (BTEX� using Modified EPA Method 8020. After analytical sampling results of air samples are returned from the laboratory, an emission verification report will be prepared for submittal to the SJVUAPCD approximately two weeks after collecting air samples, The emission verification report will contain flow rate calculations, results of laboratory analysis and the system destruction efficiency. Start-up procedures include electrical and mechanical checks to verify normal operation of equipment and a system performance check (Le., verification of design vacuums, pressures, and flow rates). System start-up will follow established SJVUAPCD procedures. If proper IRS :x:rd(a xr WALLACG-KUHL 6ASSOCIATES INC.