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CRYSTAL CREAM& BUTTER COMPANY <br /> WKA No 1628 07 <br /> June 5, 1996 <br /> Page 5 <br /> caps and utility boxes finished flush with the ground surface (Plate 5) The wells will be surveyed <br /> with respect to mean sea level (MSL) using a California-registered surveyor <br /> The air sparging wells will be developed with a vented surge block and pumped until relatively <br /> free of sediment and/or until stabilized pH, temperature and conductivity readings are attained <br /> The water purged during development will be placed in labeled 55-gallon drums and stored on <br /> site <br /> A diagram showing construction details of the well is shown on Plate 3 <br /> Air Spar2ingNanor Extraction Pilot Test <br /> • An air sparging test will be conducted using the proposed air sparging well and observation wells <br /> The air sparging well will be used as an air injection well and the observation wells will be used to <br /> collect site specific data Equipment utilized for the test will consist of (1) an air compressor <br /> equipped with an oil coalescence filter, (2 instrumentation for measuring air velocity, air flow, and <br /> vacuum pressure, (3) PVC piping, fittings, and wellhead connections, and a pressure gauge and <br /> regulator, and (4) soil gas sample monitoring and collection equipment The air compressor will <br /> be used to deliver pressurized air below the water table <br /> Prior to starting the test, static water levels, soil gas and soil pressure will be measured and iter <br /> samples collected from the air sparging well and observation wells and analyzed fodissolved <br /> oxygen and issolved-phase petroleum hydrocarbons to obtain baseline data During the test, <br /> er samples wi a collected from the observation wells and analyzed for dissolved oxygen <br /> Water levels, soil gas and soil pressure will be periodically measured in the observation wells <br /> Measurements will be recorded at specified intervals over which time the pressure and flow rate <br /> of the injected air will be varied systematically in discrete increments Water samples will be <br /> collected from the air sparging and observation wells at the end of the pilot test and analyzed for <br /> dissolved-phase petroleum hydrocarbons and dissolved oxygen The test will be conducted for <br /> approximate) 7 eight hours <br /> `NK <br /> WALLACE KUHL <br /> Recycled paper &ASSOCIATES INC <br />