Laserfiche WebLink
i0i <br />DRAFT <br />2 SAMPLING PROGRAM REQUIREMENTS <br />5 <br />2.1 Rationale for sampling <br />The proposed sampling program is summarized in Table 2.1 and discussed in greater <br />detail in Work Plan. It includes installation of piezometers, wells, water level monitoring, <br />groundwater sampling and analysis, measurement of surface water flow and surface <br />water sampling and analysis. Limited geochemical sampling and analysis is also <br />proposed. <br />Table 2.1 Planned work and rationale <br />• <br />Sampling <br />Planned Activities <br />Rationale <br />installation <br />Bedrock <br />Install standpipe <br />• Piezometers targeted in I -Sand and /or coal seams, H- <br />Piezometers <br />piezometers <br />Sand and /or coal seams, Fab /G coal seams and the <br />• Conduct slug tests <br />sandstone unit above the Fab seam <br />• Monitor water levels <br />• [-Sand and H -Sand comprise potential first sources of <br />groundwater below proposed floor of pit <br />• Fab /G seams comprise the most likely source of <br />groundwater inflow to the pit <br />• Sandstone above Fab comprises another potential <br />source of inflow to the pit. The Utah International <br />information equates this unit with the Twentymile <br />Sandstone. <br />• Piezometers will be used to determine the level of <br />saturation in these units across the site and the pre - <br />mining piezometric head distribution. <br />• Slug tests will provide some indication of hydraulic <br />p roperties. <br />Bedrock <br />• Install monitor wells <br />• Monitor wells are targeted in the H- Sand /coal seams, <br />monitoring wells <br />• Develop wells <br />Fab /G coal seams and the sandstone above the Fab. <br />• Conduct single -hole <br />• Wells will be tested to determine hydraulic properties of <br />pumping tests <br />units. <br />• Monitor water levels <br />• Water samples will be obtained to determine baseline <br />• Obtain water quality <br />groundwater quality in each major unit that may <br />samples <br />contribute to mine inflow. <br />• Water levels will supplement information from <br />p iezometers <br />Bedrock test <br />• Install test production <br />• The test production well will determine large -scale <br />production wells <br />well <br />hydraulic parameters that will influence mine inflow, <br />• Install vibrating wire <br />dewatering and slope depressurization <br />transducers <br />• Transducers installed in holes surrounding the pumping <br />• Conduct long -term <br />well will monitor the response Jo pumping in various key <br />p umping test <br />units <br />Alluvial <br />• Install monitor wells <br />• Monitor wells are targeted in alluvium along major stream <br />monitoring wells <br />. Develop wells <br />channels adjacent to flume locations <br />• Conduct single-hole <br />• Wells will be tested to determine hydraulic properties of <br />2572 -R1 Co /owyo Coal Company, L.P. <br />Water Management Consultants <br />