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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 />Aquifer testing of municipal wells will be performed for a period of between 8 and <br />72 hours. If feasible, recovery data will be measured and recorded for the same <br />duration as the pumping phase. All procedures for discharge, water level <br />measurement, and aquifer test analysis will be the same as those discussed in <br />Section 3.1.4. <br />2.5 Task 38, Proposed Water Level Monitoring Locations <br />The SEO water level measurement databases for the Denver Basin and Lower South <br />Platte Alluvium Regions will be reviewed to identify candidate wells for autumn post <br />irrigation-season water level measurement in both the bedrock and alluvial aquifers. <br />Criteria for evaluating candidate wells include: <br />^ The well location <br />^ Aquifer screened by the well <br />^ Existence of adequate well control (location and measuring-point elevation) data <br />^ Historic record of measurements <br />^ Whether measurements are currently collected in the autumn by SEO staff or other <br />cooperating entities <br />The selected subset of wells to be measured will be chosen to represent areas most <br />impacted by groundwater development and to yield good spatial distribution. <br />Candidate wells will be discussed with SEO staff knowledgeable with the existing <br />water level monitoring program during a single half-day meeting. Issues such as site <br />access, measurement procedures, and prior experience at the candidate locations will <br />be discussed. Alternate sites may be selected based on this meeting. It is anticipated <br />that at least 60 wells will be measured once during this Task, with the specific number <br />of wells and their location in the Denver Basin and Lower South Platte Alluvium <br />Regions defined after CDM evaluates the existing data gaps and meets with SEO staff. <br />Sites for continuous monitoring of bedrock aquifer water levels will be evaluated as <br />part of this process. <br />Sites selected for monitoring will be finalized and the listing sent to the State for <br />approval. Copies of field notes from the sites will be provided by SEO staff to the <br />Consultant. It is anticipated that CDM will not need to contact any of the well owners, <br />that access to the wells will be straightforward, and that separate site visits will not be <br />needed prior to collecting the water level field data. Water levels will be measured <br />according to the procedures described in Appendix H. <br />~.~.-~ <br />Z:\SPDSS\10-CDM DELIVERABLES\PHASE 2 FIELD WORKPLAN\FINAL DRAFT\FINAL SPDSS TASK 33 2 WORK PLAN.DOC <br />