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Materials encountered in each borehole will be visually classified and described by a qualified <br />geologist or engineer from either cuttings or the cores. The Consultant's on-site <br />representative will maintain a log of all significant well construction and testing activities. <br />Cores will be photographed for additional documentation and stored in waterproof cardboard <br />core boxes. <br />Laboratory testing of vertical permeability will be conducted on 2 samples of representative <br />lithologies from the upper core run, while 2 horizontal permeability tests will be conducted on <br />samples from the core in the uppermost aquifer. The objective of the vertical permeability <br />assessment in the upper bedrock interval is to assist in determination of vertical leakance <br />characteristics, while the horizontal permeability is to determine hydraulic properties of the <br />bedrock aquifer. <br />Drilling mud and cuttings will be disposed of off-site. The site will be graded and a dryland <br />seed mix spread. <br />The well will be completed with 4-inch PVC casing and a screen length of no more than 40 <br />feet. Well completion will be in accordance with State regulations. <br />The well will be developed by surging and pumping and the produced water discharged to the <br />surface. <br />A surveyor licensed in the State of Colorado will be selected and sub-contracted to provide <br />vertical and horizontal coordinates using precision differential GPS methods. <br />A single-borehole aquifer performance test will be conducted after each well is completed and <br />developed. Large capacity wells within 2000 feet will be checked to verify that they are not <br />pumping. Pumping will be conducted at a sustainable constant rate for a period not greater <br />than 8 hours. Water from testing will be discharged to overland flow or nearby surface water <br />bodies without treatment or chemical testing. It is assumed that no permits for this discharge <br />will be required. Water level data will be recorded during the pumping and recovery phases <br />using a pressure transducer and data logger. Aquifer performance testing results will be <br />reduced and interpreted using industry standard graphical analysis techniques based on the <br />Cooper-Jacob method of analysis. <br />An in-well pressure transducer and data logger will be installed in the Phase 1 bedrock well <br />and operated fora 10-month period outside of the irrigation season. <br />The data will be recorded at an hourly interval and normalized to elevation for reporting. After <br />initial installation and confirmation of operation over atwo-week start-up period, data will be <br />retrieved on asemi-annual basis. <br />This data will be used to analyze water levels as part of Task 44 <br />Deliverables: <br />Task 36.2 Phase 1 Denver Basin Region Bedrock Well Construction and Testing Report <br />SPDSS Groundwater SOW, Phase 1 Page 16 <br />