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Figures—Soil Gas Probe Emplacement Methods <br /> Figure 1—Permanent/Semi-permanent Gas Figure 2—Multi-depth Gas Probe <br /> Probe Construction Diagram Constmction Diagram <br /> Fill to the <br /> Fill to the Hydrated surface <br /> surface granular <br /> bentonite <br /> .` <br /> Approx.1-ft in ,.,• ��•.; Dry Approx.1-ft in <br /> `%• <br /> •4ranular thickness <br /> thickness MI. :?•pM,r 9 <br /> '4:•`,.r bentonite <br /> Approx.1-ft in Approx. 1-ft in <br /> Probe tip thickness <br /> thickness <br /> . ... .. Sand <br /> pack <br /> Temporary Gas <br /> Probe Method <br /> To Surface Fill to <br /> approx.1-ft <br /> below sand <br /> Sample <br /> tube <br /> pack <br /> Drive <br /> rod <br /> Vapor <br /> inlet <br /> Drive <br /> tip <br /> • •+ •• . Approx.1-ft in <br /> thickness <br /> Approx.1-ft in <br /> thickness <br /> 01/28/2003 -24- <br />