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Lake seep water. These data will be evaluated with respect to spatial and temporal trends and <br />changes from historical data. Additionally, all available data related to water levels in the wells and <br />Robinson Lake, seep pump station pumping rates, and process data that may influence changes to <br />Robinson Lake also will be reviewed. <br />• Conduct an initial site reconnaissance (scheduled for April 19, 2013) with Tetra Tech's <br />hydrogeologist and geochemist. <br />• Develop a conceptual hydrogeochemical model that describes flow with respect to both hydrologic <br />and chemical parameters along a transect from Robinson Lake to Eagle Park Reservoir. <br />• Incorporate new monthly sampling data as they become available and modify the conceptual model, <br />including recommendations for additional work as required. <br />We have scheduled this first phase of work to be completed within the next two to three weeks. Current snow <br />conditions preclude extensive field investigation at this time. However, when conditions allow, we anticipate <br />conducting additional site reconnaissance and performing additional sampling and analysis of springs, seeps <br />and surface water in the area, as well as Robinson Lake and Robinson Lake seep. Other investigative work <br />that may be performed when conditions allow include in -situ groundwater sampling using a Geoprobe and/or <br />constructing new monitoring wells between Robinson Lake and EVMW -4. <br />The data collected from this field investigation phase will be then evaluated together with data from the <br />preliminary investigation to refine the conceptual hydrogeochemical model to better estimate flow and <br />attenuation rates. Based on these results, and in accordance with the WQMP, Climax will consult with <br />DRMS and Eagle Park Reservoir Company to determine the appropriate actions to be taken. <br />Climax will provide you with the results of the Tetra Tech investigation when available, and can either <br />teleconference or meet with you to discuss those results. In the meantime, please feel free to contact me if <br />you have specific questions on the contents of this letter and attachments. <br />Sincerely, <br />Raymond Lazuk <br />Environmental Manager <br />attachments <br />2 <br />