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• Entity did not measure static autumn 2004 water levels (5) <br />3.3 Quality Assurance/Quality Control <br />A series of quality control steps were undertaken during the water level collection process as <br />described below. <br />In the field, a variety of steps were taken to obtain an accurate water level measurement. In <br />some cases the water level in the well was obtained using two methods when a sonic water <br />level meter was being evaluated for possible future use; if the two measurements differed, then <br />the direct physical water level measurement (e.g., steel tape or M-scope) was given preference. <br />If there was uncertainty in a water level measurement made using a steel tape due to smearing <br />of the chalk, the water level was measurement was repeated. <br />When solicited data was received, it was compared to previous water levels for that well. If the <br />measurement differed significantly from the previous measurement, the entity was contacted to <br />confirm the measurement. It was assumed that the solicited water level measurements were <br />taken using the same method as measurements submitted previously to the SEO for the <br />bedrock water level monitoring program. <br />Once all of the data was collected, it was compiled into an electronic format. Numerical data <br />from each of the sources were initially entered into a Microsoft Excel® spreadsheet. The data <br />entry was then checked for accuracy by comparing 10 percent of the values to the original hard <br />copy data. All solicited data received were checked for data importation/data entry accuracy. If <br />errors in the data entry were found or if the values appeared to be suspect in any way, the value <br />was confirmed with the original entity and any errors were corrected in the spreadsheet. This <br />procedure was used to assure quality for all data that was added to the State's HydroBase. <br />Data collected in Task 39.1 will be included in the Task 44.2 and 44.3 Technical Memoranda as <br />well as included in the State's HydroBase database. <br />Summary and Conclusions <br />CDM completed Task 39, collecting autumn water level measurements in 2004 for Phase 2. <br />Below are conclusions from the data collected during this task. <br />^ Autumn water level data was collected for 83 wells in the Denver Basin. <br />^ Updated information on well owners, location of wells and measurement methods were <br />documented and provided to the SEO. <br />^ Well completion information for the bedrock wells in the SEO water level monitoring <br />network was compiled and evaluated to identify the wells which have sensing zones in a <br />single bedrock aquifer. <br />^ Using a sonic water level meter would speed up the data collection process. <br />