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S1 water truck <br /> 1 pipe truck <br /> 1 supervisor's vehicle <br /> I driller's pickup truck <br /> I geophysical log truck <br /> 1 truck with low bed trailer (for backhoe transport) <br /> The water truck, driller's pickup truck, supervisor's vehicle and geophysical log <br /> truck will use the access routes on a daily basis. The other vehicles will remain on the <br /> site until completion of the wells. <br /> The drilling equipment will occupy an area about 100 x 120 feet during the drilling <br /> operation. All activity associated with the drilling of a single well will be carried out <br /> within this area. Figure 2 illustrates a typical drill site layout. The drill rig will be <br /> situated on the upslope side of the drill area. At bedrock well locations, mud pits <br /> (approximate dimensions, 6 feet wide by 10 feet long by 8 feet deep) will be dug <br /> adjacent to and downslope from the drill rig. The pits will contain the drill chips and <br /> water discharged from the drill hole. From two to four pits will be necessary at each <br /> bedrock well site, depending on hole depth and drilling conditions. A small refuse pit (2 <br /> feet wide by 4 feet long by 4 feet deep) will also be dug close to the drill rig to <br /> accommodate refuse disposal. Some holes may require a larger mud pit (10 feet wide <br /> by 10 feet long by 8 feet deep) to accommodate drill foams and possible aquifer flows. <br /> The alluvial exploration holes and piezometer installation locations are shallow enough <br /> that mud pits will not be required. All excavation will be accomplished with a backhoe. <br /> The topsoil will be stockpiled separately from the subsoil, for future reclamation of the <br /> sites. <br /> Compressed air will be used for the removal of drill cuttings as long as borehole <br /> conditions allow. When necessary, water will be circulated from the mud pits through <br /> the rig and into the borehole to remove cuttings. To maintain fluid circulation, the use <br /> of commercial foams or bentonites may be required. Any such fluid will be contained in <br /> the mud pits. <br /> • <br /> PR-31-12 -12- <br /> 6/10/83 <br />