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grout may be used if appropriate. Geomatrix field staff will calculate the borehole volume and <br /> compare it to the volume of grout used to evaluate whether bridging has occurred. These <br /> calculations and the actual volume emplaced will be noted on the BORING LOG. The grout will <br /> be placed in continuous lifts from the bottom of the boring to a depth of 20 feet above the water <br /> table.. The grout will be emplaced by pumping it through the hollow stem augers, drill pipe, <br /> tremie pipe, or flexible hose initially lowered to the bottom of the borings and raised <br /> incrementally as placement proceeds. If hollow stem augers are used, the augers should be raised <br /> incrementally as grout emplacement proceeds. Augers will not be raised in increments greater <br /> than 20 feet or greater than allowed by borehole stability. Borings that are terminated above the <br /> water table and not greater than 20 feet deep may be destroyed by continuous lifts originating at <br /> the ground surface. The grout will be pumped or poured until a return of fresh grout is visible at <br /> the surface. Additional grout may need to be added to the soil boring if significant settlement <br /> has occurred after the grout has set. <br /> Attachments: Daily Field Record <br /> Boring Log <br /> Well Log <br /> DRILLING AND DESTRUCTION OF SOIL BORINGS Page 6 of 6 <br /> PROTO-DD.doc REVISION DATE:MARCH 1996 DD-6 <br />