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10 <br /> 5. During the drilling of the test holes, the Contractor shall collect representative samples <br /> of the rotary drill cuttings at 10-foot intervals and at formation changes. The Engineer may <br /> direct the Contractor to collect samples at more frequent intervals if deemed appropriate. <br /> The samples collected shall not be washed. They shall be carefully drained of excess <br /> drilling fluid but in a manner which will preserve the finer particle size of the sample. Each <br /> sample taken shall be preserved in quart-size"Zip-Lock" plastic freezer bags and marked <br /> as to date,depth,and well number. The samples shall be properly stored by the Contractor <br /> in a manner as to prevent breakage or loss until they are accepted by the Engineer. <br /> 6. Upon completion of the test hole drilling, a geophysical log shall be conducted. <br /> 2.3.3 GEOPHYSICAL LOGGING <br /> A. Scope -- This item shall consist of conditioning the bore hole and conducting geophysical <br /> surveys in the test hole. The geophysical surveys to be run in the test holes are the gamma ray, <br /> spontaneous potential and resistivity surveys. <br /> B. Methods <br /> 1. The Contractor shall furnish services for logging the test holes. An acceptable <br /> geophysical logging service company is Pacific Surveys, Stewart Well Logging Service, or <br /> approved equal. Borehole geophysical logs, consisting of gamma ray, spontaneous <br /> potential (SP)and multiple resistivity, shall be conducted in each test hole. <br /> 2. The spontaneous potential survey shall be plotted on a scale of one-inch equal to plus <br /> or minus 20 millivolts. The gamma ray survey shall be plotted on a scale of one-inch equal <br /> to plus or minus 20 API units. The multiple resistivity survey shall consist of a point <br /> resistivity curve and multiple resistivity curves employing 16-inch short normal and 64-inch <br /> long normal spacing's on a one-inch equal to 20 or 40 ohm scale. All surveys will be plotted <br /> on a footage scale of one-inch equal to 20 feet in accordance with the American Petroleum <br /> Institute standard. <br /> 3. The Contractor is responsible for the integrity of the borehole to assure that the <br /> geophysical logging can be successfully conducted. The Contractor shall maintain <br /> circulation in the borehole with tools on the bottom of the hole until the logging equipment <br /> is on location and prepared to conduct the survey. The logging service company shall <br /> obtain a ditch sample of the circulating fluid for calibration of the logs prior to the securing <br /> of the circulating pump. Tools shall then be pulled by the Contractor and the logging <br /> services immediately commenced. If the logging probe fails to descend to the desired <br /> depth,the Contractor, at his/her own expense, shall run the drilling tools to the target depth <br /> to recondition the hole. <br /> 4. Upon completion of logging operation, the Contractor will deliver four(4) field prints to <br /> the Engineer. Four final prints and an electronic ASCII file of the geophysical surveys shall <br /> be provided with the final records submittal. The field copies of the electrical log shall be <br /> approved by the Engineer before the logging service is released from the site by the <br /> Contractor. <br /> 2.3.4 TEST HOLE REAMING <br /> A. Scope -- This item shall consist of reaming the test hole to the final specified well depth in <br />