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<br />'~-., ... <br /> <br />. <br /> <br />. <br /> <br />An air permeameter, capable of measuring the permeability ~f porous <br />media with equivalent hydraulic conductivites as low as 10 cm/s, is <br />available and will be used for the permeability measurements. A <br />variety of drying ovens, balances, and miscellaneous equipment is <br />available for use as required. <br /> <br />PERSONNEL <br /> <br />David McWhorter, Professor, will be responsible for all aspects of <br />the proposed work. He has 22 years of experience in research <br />related to flow in porous media. His speciality is the mechanics of <br />multi-fluid systems in porous media. <br /> <br />The measurements and analyses will be conducted by a graduate <br />student under Professor McWhorter's direction. Support will be <br />provided by a laboratory technician with 15 years experience in the <br />Porous Media Laboratory. <br /> <br />Jehn & Wood, Inc. are consultants to Castle Pines and will be responsible <br />for control and disposition of the core and contracting for most of the <br />geophysical logs to be run on the core hole. Lithologic descriptions of <br />the core and coordination between this study and the landowner will also <br />be provided by Jehn and Wood, Inc. <br /> <br />The U.S. Geological Survey will be responsible for additional geophysical <br />logging, construction of an observation well, and aquifer testing as <br />outlined below. <br /> <br />OBJECTIVE <br /> <br />The objective of the aquifer testing is to provide large scale <br />determinations of hydraulic conductivity for specific geologic <br />materials for comparison with, and verification of, results of <br />laboratory core analyses. Aquifer test results, in conjunction with <br />core analyses, provide a better basis for interpreting the <br />geophysical logs. The goal is to improve log interpretation <br />techniques to allow better definition of aquifer units in the <br />subsurface without the cost and delay associated with core drilling <br />on laboratory analyses. Conduct of the detailed aquifer test will <br />be dependent on funds remaining after completion of the geophysical <br />logging and core analysis objectives. <br /> <br />APPROACH <br /> <br />It is proposed that either the existing 4 inch core hole be reamed <br />to an 8 inch hole or a new 8 inch hole be drilled to allow access <br />for the large probe for the nuclear magnetic resonance log, and to <br />allow placement of a 4~ inch diameter steel casing to the base of <br />the Arapahoe aquifer. After logging, the casing will be set, <br />cemented into the hole to prevent leakage, and gun perforated at <br />selected intervals. Inflatable packers will then be set to isolate <br />pressure transducers in selected perforated intervals. A nearby <br />municipal well completed in the Arapahoe aquifer will then be pumped <br />and head changes monitored in the packed-off intervals. <br />