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Figure #4: Air Sparge11 Construction Schematiw) <br /> Cutter Lumber Site <br /> 3930 South Eldorado Street ` Flush Mounted Well Box <br /> Stockton, CA 95206 F --Concrete Collar <br /> Paved Surface <br /> a <br /> 2 Diameter Schedule 40 Blank Casing <br /> Clay& Silt <br /> 20'feet <br /> Sand& Silt t <br /> Cement Grout <br /> s:> 30'feet <br /> Silt&Clay Approximate Groundwater Level <br /> a � j <br /> — ;� 1------------------------ <br /> i <br /> f; <br /> 40' <br /> Sand & Silt ... ........ Bentonite Transition Seal <br /> L <br /> .010 Slotted 2" Schedule <br /> 40 PVC Casing <br /> 45Ife #3 Sand Filter Pack <br /> Silt <br /> 8" Diameter Boring <br /> 50'feet <br /> Clay and Silt <br /> L <br />