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West Elk Mine 2007 Annual Hydrology Report 7 <br />• access to most sites at the Project area is impractical, so the baseline monthly monitoring is <br />generally not performed from October through March. A summary of the revised baseline <br />monitoring plan schedule frequencies is presented in Table 1 and the first 5 years of monitoring <br />(including baseline) laboratory parameters are shown on Table 2. <br />Table 1. Monitoring Frequencies <br />• <br />C7 <br />Routine Monitoring Baseline Monitoring <br /> <br />Month Flow / <br />Level Field <br />Parameters Laboratory <br />Analysis <br /> January <br /> February <br /> March <br />Rising Limb - April 3 to May 13 Aril x X X <br />Peak Flow - April 21 to June 26 May x X X <br />Low Flow - July 10 to October 8 June x X X <br /> Jul x X X <br /> August x X X <br /> September x X X <br /> October <br /> November <br /> December <br />In general, baseline monitoring is conducted monthly, usually from April through September in <br />order to provide adequate data to show seasonal variations in water quality and quantity. Winter <br />access to most sites at the Project area is impractical, so the baseline monitoring is generally not <br />performed from October through March. <br />June 2008 HydroGeo, Inc.