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• Method of Exploration and Equipment to be Used - Seismic <br />Approximately 6,355 feet of seismic lines will be processed under this Notice of Intent. <br />This will involve the drilling of a maximum of 116 holes, 7 inch in diameter, to a maximum <br />depth of 5 feet (1 hole every 55 feet along lines). A series of geophone arrays will be <br />spaced along each seismic line. An explosive charge ranging from 1/5 to i/3 pound will be <br />detonated, individually, in each hole, with the reflection data recorded through the <br />geophone arrays by a portable exploration seismograph unit. <br />Drilling will be accomplished with a portable, beck-pack auger drill. Please see <br />accompanying photographs of the auger drill, geoph ones, and drill hole surface <br />disturbance. <br />Method of Exploration and Equipment to be Used - Drilling <br />Exploration will consist of rotary drilling. The equipment used will be one Mayhew 1500 <br />rotary drill. It is anticipated that most of the locations can be drilled by air from an <br />air compressor mounted on the drill rig being used. However, if water is used, one <br />1,000-gallon truck will be parked in the field area. Other equipment in the field will <br />• include four-wheel drive pickups and one geophysical logging truck. <br />There will be a total of 2 monitor wells end 1 bore location to be explored at average <br />depths of 400 to 500 feet.. The diameter of each hole will be 5-1/8 inches. Drill pads <br />will average 50' x 50' in size, with the construction of 10' x 10' mud pits if drilling <br />fluid is required for hole stability. <br />In accordance with the State Engineers Office concerning monitor holes, a Notice of Intent <br />to Construct shall be submitted to their office at lees[ three days prior to construction. <br />Upon completion of the monitoring holes, a Well Completion Report will be filed with the <br />Division of Water Resources. An application to convert each monitor hole to a permitted <br />monitoring well will be filed with the State Engineers Office within the time frame <br />specified. See Figure 7 for generalized well completion. <br /> L~ht-Use Roads. Drill Pads- Seed Mixtures <br /> No roads will be constructed for this project. Existing roads will be used only if <br /> climatic conditions are such that usage will not cause degradation, erosion, or increase <br />. sedimenta <br />d <br />ilt tion. No drainage <br />b structures will be installed on any existing road. No drill <br /> pa <br />s w e constructed for the seismic portion of the project. Three drill pads and mud <br /> pits will be constructed for the monitor wells and bore hole. <br /> 2 <br />