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Surface <br /> Gas Tight Fitting <br /> Probe Box (optional) <br /> Neat-Cement Grout <br /> (if permanent) <br /> or <br /> Hydrated Bentonite <br /> (if temporary) <br /> Tubing <br /> (metal, nylon, PEEK,teflon®) <br /> AL T <br /> DBT -1 Ft Dry Granular Bentonite DBT <br /> ST Probe Tip ST <br /> �BD -1 Ft Sand <br /> TL <br /> Neat-Cement Grout <br /> (if permanent) <br /> or <br /> Hydrated Bentonite <br /> (if temporary) <br /> -1 Ft Dry Granular Bentonite <br /> Legend Probe Tip <br /> BD = borehole diameter(inches) <br /> DBT = dry bentonite thickness (ft) -1 Ft Sand DBT <br /> ST = sand pack thickness (ft) _X_ <br /> TL = tubing length (ft) ST <br /> PEEK = Polyetheretherketone s <br /> {�BD-1� <br /> FROM ADVISORY,ACTIVE SOIL GAS INVESTIGATIONS(CALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL,JULY 2015),FIGURE 1. <br /> �i CDIM ENGINEERING, INC. TYPICAL SINGLE(LEFT)AND NESTED(RIGHT) FIGURE <br /> 45 POLK STREET,THIRD FLOOR SOIL VAPOR WELL CONSTRUCTION DIAGRAM <br /> ��■ SAN FRANCISCO,CA 94102 2.1 <br /> WWW.CDIMENGINEERING.COM <br /> i N G 1 N e E R i N G PH: (415)498-0535 <br />