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• Drill cuttings will be disposed of at the site by spreading on the site and leveling, if <br />compatible with the land-use and acceptable to the owner. Disturbed areas will be re-seeded <br />with a dryland mix, if necessary. <br />� Aquifer materials in each borehole will be sampled and visually classified and described by a <br />qualified geologist or engineer to characterize general lithology below the water table to the <br />total borehole depth. Selected samples will be retained for geotechnical analysis, consisting <br />of grain size determinations by the wet-sieve method at a maximum of 4 intervals per well. <br />Cores will be photographed for additional documentation. <br />• As included in Exhibit D, Task Compensation, I Consultant's costs are based on an average <br />drilling time of 1.5 days per well for the alluvial wells with the Consultant's on-site <br />representative being present for up to an average of 1 day per well. The Consultant will <br />maintain a log of all significant well construction and testing activities occurring in their <br />presence. <br />• As included in Exhibit D, Task Compensation, the cost estimates for this Task are based on 17 <br />wells that are expected to be installed using Direct Push drilling techniques, 3 wells that will <br />be installed using Hollow Stem Auger drilling techniques, and 5 sites will have data collected <br />using existing wells. <br />• All wells installed under this Task will be completed with a 20-foot screen interval, on <br />average, with the actual screen length selected in the field by the Consultant based on the <br />lithologies encountered. <br />• Wells will be constructed of either 1-inch or 2-inch ID PVC with a mill-slotted screen. Well <br />completion will be in accordance with State regulations. <br />• The well will be developed by surging or 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 by the <br />Consultant to provide vertical and horizontal coordinates using precision differential GPS <br />methods with vertical accuracy within 0.1 feet and horizontal accuracy within 2.0 feet. <br />• As included in Exhibit D, Task Compensation, multi-well aquifer pumping tests will be <br />conducted at 20 of the sites targeted for Phase 2 field data collection, with single-well tests <br />conducted at the remaining 5 sites, which will be located in areas to collect regional <br />background water level data. The final number sites used for multi-well tests may be revised <br />in Task 33 if recommended by the Consultant and approved in writing by the State. <br />� For sites where a multi-well aquifer pumping test will be conducted, an observation well will <br />be located near an existing large capacity well, which will serve as the pumping well during <br />the aquifer test. As included in Exhibit D, Task Compensation, pumping will be conducted at <br />a sustainable constant rate for a period not less than 8 hours and for up to 72 hours based on <br />an average test duration of 24 hours. Water from testing will be discharged by the owner of <br />the existing large capacity well, with an effort made to have this water conveyed away from <br />the observation well so as to minimize its effects on aquifer drawdown due to pumping. ' <br />SPDSS Groundwater SOW, Phase 2 5 <br />