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u � <br /> Chevron <br /> v <br /> Depth (ft) <br /> 0 1/4"o.d. Nylon Tubes With Gas-Tight Caps <br /> Well Box <br /> 1 12"Cement <br /> 2 <br /> 3 36"Pre-Hydrated Granular Bentonite <br /> 4 <br /> 5 12"Dry, Granular Bentonite <br /> 6 - - _ 12"Sand Pack <br /> 7 <br /> 6 36"Pre-Hydrated Granular Bentonite <br /> 9 <br /> 10 12"Dry, Granular Bentonite <br /> 11 12"Sand Pack <br /> 12 <br /> 13 36" Pre-Hydrated Granular Bentonite <br /> 14 <br /> 15 12"Dry, Granular Bentonite <br /> 16 Err - - 12"Sand Pack <br /> TD 16.5' ' 12" <br /> Figure 1. Augered, permanent multilevel soil vapor sampling probe (by Chuck Zuspan, <br /> CVX ETC). <br /> ETC Soil Vapor Sampling Technical Toolkit 7 . <br /> Version 1.4, September 7,2005 <br />