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., <br />A significant amount of work has been completed by previous investigators related to <br />groundwater conditions in the study area, as summarized in the SPDSS Feasibility Study and in <br />the Groundwater Phase 1, Phase 2 and Phase 3 deliverables. The Phase 4 field data collection <br />program (Task 39) is a continuation of the Phase 1, 2 and Phase 3 field data collection efforts to <br />fill data gaps in water level data identified after historical data were collected and analyzed (see <br />Phase 3: Tasks 34, 39, 41, 42, 43 and 44}. Data obtained from the Phase 4 field data collection <br />program will be analyzed, added to the existing groundwater databases and maps (under Task 39), <br />and be used to undertake new analyses and mapping (Tasks 39 and 46). The databases, analyses <br />and maps also will be used to evaluate the groundwater model of the Denver Basin Region being <br />developed collaborativelywith the USGS (Task 47), and to support and expand the modeling of <br />the alluvial aquifer system (Tasks 48 and 50). <br />All deliverables will be consistent with the DSS design, including use of HydroBase. Deliverables <br />will use DSS standards for memo formats, report formats, and database design. <br />Task 39: Collect Water Level Data <br />Objective: <br />This task will enhance the State's groundwater level database by continuing the Phase 3 <br />collection of measurements during the fa112006 season after agricultural pumping has ceased and <br />will add to the understanding of seasonal changes in groundwater levels when compared to the <br />Colorado Division of Water Resource's (DWR} spring season measurements. This task will also <br />download and process the data from the alluvial and bedrock SPDSS monitoring wells installed <br />with pressure transducer and data loggers. This task will help fulfill one of the recommendations <br />of the SB 96-74 Review Committee. <br />Approach: <br />Task 39.1 Water Level Measurements <br />• Up to 111 bedrock and alluvial wells measured during Phase 3 Task 39 are expected to be <br />measured during the fall post-irrigation season. <br />The Groundwater Contractor will obtain verbal permission for site access from the well owner <br />or resident prior to visiting their well. If contact cannot be made with the well owner to obtain <br />verbal permission, the well will not be visited and measured, unless a DWR employee <br />accompanies Contractor staff for undertaking the field activities for such wells. It is assumed <br />that physical access to the wells will be straightforward, and separate site visits will not be <br />needed prior to collecting the water level field data. <br />• The Groundwater Contractor will collect measurements of the depth to water at each site <br />using methods comparable to those currently used by the DWR during their spring-season <br />measurements. The measurement date, time, site identification number, measuring point <br />SPDSS_Phase4_gw SOW_09-15-06.doc 2 <br />