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Groundwater Quality Monitoring Plan <br /> RI <br /> ct <br /> 1.0 INTRODUCTION <br /> LG Everist, Inc is planning to mine aggregate resources from northern portions of the <br /> Fort Lupton mine site, Permit M-1999-120. An amended mining permit for the Fort <br /> Lupton mine site incorporates the northern portions into the mining site. The <br /> amendment area is approximately 202.25 acres and is located northeast and northwest <br /> of the current Fort Lupton mine site. <br /> The purpose of this Groundwater Quality Monitoring Plan (GWMP) is to provide a <br /> description and assessment of the potential of the introduction of pollutants into the <br /> groundwater during mining activities, and to assess if and how water quality may <br /> change over time. The plan also provides information about the collection of water level <br /> measurements to show water level changes over time. <br /> Sample collection is described in a separate Groundwater Sampling Plan (GSP). The <br /> groundwater sampling procedures, sample handling, and laboratory methods are <br /> presented in the GSP. <br /> This GWMP will designate what data is collected and how it may be interpreted and <br /> modified as the mining activities progress. Both the GWMP and the Groundwater <br /> Sampling Plan (GSP)will be followed for all groundwater monitoring done at the LG <br /> Everist— Fort Lupton North (LGE-FLN) site. <br /> The Colorado Division of Reclamation, Mining and Safety(DRMS) requires a GWMP for <br /> the LG Everist—Fort Lupton (LGE-FL) mining permit to establish baseline constituent <br /> concentrations for comparison to future sample results to assess whether mining <br /> activities are impacting groundwater quality. Water quality monitoring wells (WQM), <br /> approved by DRMS, will be sampled for five quarters to establish a baseline set of data. <br /> Future samples may be collected from the water quality monitoring wells (WQM) and <br /> compared to the baseline data during mining activities. <br /> 2.0 MONITORING PLAN COMPONENTS <br /> The network of groundwater monitoring wells is shown in Figure 1 —Monitoring Wells. <br /> The entire well monitoring network includes the water quality monitoring wells and the <br /> other water gauging wells. All of the wells are completed in the uppermost aquifer and <br /> located in up-gradient and down-gradient positions in the alluvium. Additional monitoring <br /> wells may be included in the future as necessary, or in response to regulatory concerns. <br /> Baseline sample data is collected from the WQM wells. The baseline sample data from <br /> each of the WQM will be compared to future sample results. The comparison of the <br /> baseline data and additional WQM sample results is used to assess potential changes <br /> in water chemistry that may cause overall changes in water quality downstream. <br /> r�MOLcu►TEENS LG Everist Fort Lupton GW Monitoring Plan <br /> a asso Page 2 of 7 <br /> 27 <br />