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reclamation plans for the Southfield Mine. These measures are based upon available baseline <br />information on the existing hydrologic environment, previous modeling of hydrologic systems, the <br />experience of similar mining operations in controlling hydrologic impacts, applicable regulatory <br />requirements, and the results of ongoing monitoring programs. Hydrologic control and mitigation <br />measures developed for the Southfield operations have been designed to prevent significant changes <br />in the quantity and quality of surface and groundwater resources, preserve existing hydrologic <br />functions, and limit any adverse impacts on surface or groundwater users. For the entire time that the <br />Southfield Mine permit has been in existence, EFCI has monitored impacts on the hydrologic balance <br />to determine if the control and mitigation measures are effective. <br />The groundwater monitoring program described in Section 2.05.6, Mitigation of Surface Coal Mining <br />Operation Impacts, provides relevant information on groundwater levels, recharge and discharge <br />rates, and water quality. The Hydrologic Monitoring Plan (Exhibit 25) was designed to insure a <br />frequency and distribution of groundwater data collection adequate to identify and document trends <br />and fluctuations in the quantity and quality of groundwater and the overall effects of mining on the <br />hydrologic balance. The groundwater monitoring data and resulting evaluations have been used to <br />identify any potential problems on a timely basis and develop any necessary mitigation measures. <br />The surface water monitoring plan, together with the monitoring of pond outfalls associated with <br />CDPS permits issued by the Water Quality Control Division, are also described in Section 2.05.6 and <br />Exhibit 25. This plan provides for measurement and recording of the quantity and quality of all <br />discharges from the permit area. The frequency, density, and accuracy of monitoring was designed to <br />allow EFCI to evaluate and determine the success of mine plans, drainage and sediment control <br />facilities, and reclamation of disturbed areas. <br />Southfield Mine C-1981-014 Page 8 of 12 August 22, 2016 <br />SL -04 <br />