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G . The CONTRACTOR is responsible for filing all drilling and well completion records <br /> with the appropriate agencies . <br /> H . All drilling will be measured to the nearest linear foot of completed borehole depth . <br /> 1 . The CONTRACTOR shall measure and record the water level in the well to the <br /> nearest 0. 01 of a foot from a permanent measuring point at the beginning and end of <br /> each shift. <br /> 3 . 02 DRILLING <br /> A . Utilizing mud-rotary drilling technigues, drill a nominal 8 to 12-inch diameter pilot <br /> hole into the top of the intermediate confining unit at an estimated depth of 140 feet <br /> below land surface (ft bls) . <br /> B . Ream the pilot hole to a nominal 30-inch diameter. Condition borehole through <br /> circulation of drilling fluids in preparation for geophysical logging and installation of <br /> nominal 24-inch diameter intermediate casing. <br /> C . Following completion of grouting of nominal 24-inch diameter intermediate casing, <br /> drill a nominal 8 to 12 -inch diameter pilot hole to an estimated depth of 400 feet into <br /> the top of the UFA utilizing mud-rotary drilling techniques . <br /> D. Ream the pilot hole to a nominal 23 -inch diameter. Condition borehole through <br /> circulation of drilling fluids in preparation for geophysical logging and installation of <br /> nominal 16-inch diameter final casing. <br /> E . Following completion of grouting of nominal 16-inch diameter final casing, drill a <br /> nominal 14-inch diameter borehole hole utilizing reverse-air drilling techniques to an <br /> estimated completion depth of 750 ft bls. <br /> F. The boreholes shall be drilled so as to permit the installation of the casing, straight and <br /> plumb, to the tolerances specified in Section CASING. <br /> G . The CONTRACTOR may check plumbness, out-of-roundness , and straightness of the <br /> drilled hole as the drilling progresses . Such checking shall not relieve the <br /> CONTRACTOR from requirements as specified in Section CASING . <br /> 3 .03 FORMATION SAMPLES <br /> A . Take representative formation samples at 10-foot intervals and at major lithologic <br /> contacts from land surface to the full depth of the well . Each sample must be <br /> representative of the actual depth to which drilling has progressed. Samples shall be <br /> approximately 1 cup in volume . Place each sample in a container labeled with the <br /> DRILLING <br /> 02050-4 <br /> C :\DOCUME— I \mikeh\LOCALS- 1 \Temp\Temporary Directory 13 for IRC wells Div I .zip\06-TRC_DRFLLFNG.D0C <br />