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South Platte Decision Support System Groundwater Component Task 33 Field Study Work Plan <br />for Alluvial and Bedrock Well Installation, Testing, and Water Level Monitoring <br />that will be performed under Task 37, a Phase 2 bedrock monitoring well may be <br />installed. This well, if installed, will be located near an existing high-capacity well for <br />the purpose of performing amulti-well aquifer test. The bedrock well will be drilled <br />at a location that is determined to be a data gap area, which is near ahigh-capacity <br />well, and has a cooperative operator. <br />2.4 Task 37, Proposed Denver Basin Region Bedrock Aquifer <br />Testing Locations <br />Candidate aquifer testing locations within the Denver Basin Region bedrock aquifers <br />will be determined based on the findings from Phase 2 in Task 37.1. Owners of <br />existing high-capacity bedrock wells that are located within areas targeted for <br />investigation will be requested to cooperate in the SPDSS by allowing their wells to be <br />used in an aquifer pumping test. It is anticipated that most of these aquifer pumping <br />tests will be single-well drawdown and recovery tests. Incases where observation <br />well(s) exist in the vicinity of a high capacity well, they will be evaluated for use as <br />observation wells in the aquifer tests. Evaluation criteria include having well <br />completion information, lithologic or geophysical logs, and a measurement port for <br />water level measurement. It will be necessary for an observation well to have a <br />screened interval in the same aquifer as the nearby high-capacity well. <br />Information on the location and the owners of candidate bedrock wells will be <br />identified through examination of well permit applications provided by the SEO to <br />CDM. Up to 50 municipalities or other entities will be contacted up to two times to <br />discuss details of collaborative data gathering activities. Candidate locations will be <br />screened to a subset that are in suitable locations and have available wells that meet <br />the technical criteria and whose owners are cooperative. It is anticipated that the State <br />will provide limited assistance to CDM, such as discussing CDM's purposes with the <br />applicant and assisting CDM administratively with site access, as needed. <br />The existing high-capacity bedrock wells will need to satisfy a set of criteria before <br />they will be accepted for use in the test. These criteria include: <br />^ Willingness of the operator to shut down the well before and after the test for a <br />suitable period to allow water level recovery <br />^ Availability of lithologic or geophysical logs and well construction information <br />identifying the aquifer to be pumped <br />^ Location of the well screen within a single bedrock aquifer as defined by the <br />Denver Basin Rules <br />^ Presence of an in-line flow meter capable of certification by the State <br />^ Presence of a sounding tube to allow water level measurements in the pumped well <br />and any available observation well(s) <br />~.~.-~ <br />Z:\SPDSS\10-CDM DELIVERABLES\PHASE 2 FIELD WORKPLAN\FINAL DRAFT\FINAL SPDSS TASK 33 2 WORK PLAN.DOC <br />