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�� `+_ 3 � Y w._„e : ,q,��.. �. � s'��' �« -.ice _+,�„ - - A `�a�. I� •' <br /> .nr .�- - � -41�A 3�s - x rrr i •� � '� r F y <br /> 6.� <br /> r <br /> 1 <br /> SAMPLE TUBE ' <br /> TO PUMP <br /> -- 5tJ0E HAMMER <br /> SLEEVE , <br /> sTRIKER PLATE SECTION <br /> GRADE <br /> ` Fr•1 !�r•i <br /> 3/4" DIA. HOLE • <br /> 5/8" TUBE SECTION 10-30 FEET • <br /> Y <br /> �f 0 • <br /> WELL POINT • <br /> s <br /> 'NELL POINT SAMPLING <br /> r A B <br /> FIGURE I. SOIL VAPOR SURVEYING <br /> The soil-vapor survey is accomplished by driving a hollow <br /> stainless-steel probe into the ground and drawing a sample <br /> of soil-vapor through the well point. <br /> A. Well point used in soil textures with grain sizes <br /> smaller than .25 mm. . <br /> B. Well point used in soil textures with grain sizes <br /> larger than .25 mm. <br />