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i <br /> Corrective Action Plan Page 6 <br /> Cutter/Western Lift Site <br /> GPE Project No. 102.3 <br /> December 12,2003 j <br /> Ir extraction well screened deeper, any'j such tiapped air ,!.should tend to migrate toward the <br /> extraction well, where it may be removed along with any entrained hydrocarbons. <br /> 3.2.2 Air Sparge Well Construction <br /> One sparge Well (ASW-1) has already been constructed. This well and the three proposed j <br /> new sparge wells locations are shown in Figure 2. The following table describes the <br /> f construction of the air sparge wells: <br /> Casing 2" Schedule 40 PVC <br /> Screen 0.010 Slotted Schedule 40 PVC <br /> Screened Interval 45-50 feet below ground surface (bgs) <br /> Filter Pack 43-50 feet bgs <br /> Filter Pack Material #3 Monterey sand <br /> Bentonite Transition Seal 43-40 feet bgs <br /> Annular Seal 0-40 feet bgs <br /> The sparge wells will be screened to expel air near the bottom or slightly below the main mass <br /> of the contaminant. This placement will allow several feet of vertical space in which the air <br /> may penetrate deeper into the native formation before beginning to rise and spread through the <br /> main contaminant mass. <br /> 3.3 Waste Disposal <br /> Soil cuttings will be temporarily stockpiled on site pending profiling and disposal to a Class II <br /> landfill. All liquid waste generated during the .well installation and development will be <br /> containerized in DOT approved containers to await proper disposal. <br /> I <br /> i <br /> I <br /> C2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone(209)569-0293 <br /> Modesto,CA 95356 Fax(209)569-0295 <br />