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- existence of a well log containing lithologic or geophysical logs and well construction <br />information, <br />- the well being screened within one bedxock aquifer as defined by the Denver Basin Rules, <br />- the presence of an in-line flow meter capable of certification by the State, <br />- the abiiity to collect water level measurements in the pumped well. <br />• As included in Exhibit D, Task Compensation cost estimates for this task are based on 10 <br />pumping tests being conducted in existing wells completed in bedrock aquifers in the Denver <br />Basin Region, provided this many entities are willing to cooperate. As conditions and budget <br />allows, additional tests may be undertaken in wells completed in the bedrock aquifers. <br />• In cases where observation well(s) exist in the vicinity of a high capacity well, they will be <br />used in the aquifer tests provided they meet certain criteria, such as having a well completion <br />diagram, lithologic or geophysical logs and being screened in the same aquifer as the nearby <br />high-capacity we1L <br />• If not already equipped, the high-capacity wells and the observation wells will be outfitted with <br />continuous water level recording devices to monitor changes in groundwater levels during the <br />aquifer pumping test. It is anticipated that water levels in each pumping well and in one other <br />well that can serve as an observation well, if present, will be monitored for at least one week <br />prior to the start of the aquifer test and for a total of up to one month. The aquifer test will <br />consist of water level measurements recorded in three phases: pretest, pumping phase, and <br />recovery phase. During the pretest phase, water level measurements will define ambient <br />conditions. During the pumping phase, the high-capacity bedrock well will pump at a <br />constant rate over the duration of this phase and water levels in the observation well will <br />decline as a cone of depression forms around the pumped well. During the recovery phase, <br />the high-capacity well will be shut down and water levels allowed to rise back towards <br />prepumping levels. <br />• Discharge will be measured periodically during the test to ensure that a constant pumping rate <br />is maintained. Discharge measurements will be made with an in-line flow meter or other <br />method acceptable to the State Engineer's Office. The pumping phase will last for at least 8 <br />hours and may extend up to one week in duration. Up to one week may be required to <br />measure the recovery in aquifer water levels once pumping stops. <br />The water level data will be analyzed using standard aquifer test analysis methods that are <br />appropriate for the type of aquifer being tested (unconfined, confined or leaky). The data <br />analysis will be used to obtain estimates of aquifer transmissivity, storage coefficient (for <br />tests with observation wells) and, where aquifer saturated thickness data are readily available <br />to the Consultant, hydraulic conductivity. <br />SPDSS Groundwater SOW, Phase 2 14 <br />