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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 />3.4.1 Water Level Measurements <br />Wells that are part of the current SEO water level monitoring program will be <br />evaluated as part of Task 39 for inclusion in the fall water level monitoring program. <br />Additionally, water level data may be obtained from wells operated by municipalities <br />or water user groups with water level monitoring programs who are willing to <br />cooperate with the SPDSS. <br />CDM will collect measurements of the depth to water at each well using methods <br />comparable to those currently used by the State during their spring-season <br />measurements. The measurement date, time, well identification number, measuring <br />point location, casing stickup, and other descriptive information pertinent to the <br />measurements will be noted and recorded in a field notebook. The procedure for <br />measuring water levels is presented in Appendix H. <br />The measurements tabulated in a field notebook will be entered into an existing <br />electronic database of water level measurements by the consultant. Following data <br />QC, the water level data will be analyzed as part of Task 44 and the electronic data <br />will be added to HydroBase in a format consistent with previous ground water level <br />data. <br />4.0 Documentation of Field Activities <br />Field and testing data will be collected in a manner consistent with the planned <br />Technical Memoranda to be prepared under Tasks 35.2, 35.3, 36.2, 37.3, 39.2, and 39.3, <br />as described in the SOW (CDM 2003b). It is anticipated that a total of six TMs will be <br />prepared, one each for alluvial wells constructed in the Denver Basin and Lower <br />South Platte Alluvium Regions (Tasks 35.2 and 35.3, respectively), one for the bedrock <br />well constructed in the Denver Basin Region (Task 36.2), one for bedrock aquifer tests <br />performed at existing wells (Task 37.3), and one each for the Denver Basin Region and <br />Lower South Platte Alluvium Region water level measurement programs (Tasks 39.2 <br />and 39.3, respectively). Each of the TMs will contain elements described in their <br />respective sections in the SOW (CDM 2003b). Draft TMs will be submitted to the State <br />electronically for review and comment. Final TMs will be submitted to the State <br />electronically and on two CDs. <br />5.0 Cost Estimates <br />Anticipated unit costs for installation of one typical monitoring well in the alluvium <br />and the bedrock aquifers are included. Unit costs presented in this work plan for an <br />alluvial well are based on maximum drilling and completion depths of up to 80 feet, <br />with an average of approximately 40 feet for DPT wells and 120 feet for HSA wells. <br />Unit costs presented in this work plan for a bedrock well are based on a maximum <br />depth of 740 feet. Engineering Cost Estimates for alluvial and bedrock wells and for <br />DPT piezometers are presented in Appendix A. <br />~.~.-~ <br />20 <br />Z:\SPDSS\10-CDM DELIVERABLES\PHASE 2 FIELD WORKPLAN\FINAL DRAFT\FINAL SPDSS TASK 33 2 WORK PLAN.DOC <br />