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Final West Elk Mine 2005 Annual Hydrology Report 6 <br />• 3.0 HYDROLOGIC MONITORING <br />The hydrologic monitoring program for the Project includes monitoring surface water resources, <br />springs and seeps, ground water resources, the underdrain, and pertinent mine water sites. Routine <br />monitoring includes collecting field water quality data (pH, electrical conductivity (EC), and <br />temperature) three times per year and collecting samples for laboratory analysis annually. Flow or <br />water level measurements are collected three times per year. The three monitoring periods <br />correspond with the rising limb period between April 3`d and May 13a', the peak flow period <br />between April 21s' and June 26`s, and the low flow period between July 10'h and October 8`h. <br />A separate baseline monitoring schedule is followed for approximately one year prior to mine <br />development or two years prior to permit approval for newly added monitoring sites. The baseline <br />schedule involves collecting field water quality data, recording flow or water level measurements, <br />and collecting samples for laboratory analysis of permit-specified water quality parameters on a <br />monthly basis. Site accessibility and mine development timing are considered when determining <br />baseline schedules. Baseline monitoring is typically conducted monthly from April through <br />October. Since most areas at the Wes[ Elk Mine are inaccessible through the winter months, <br />baseline monitoring is unfeasible and is typically not required from November through March. A <br />• summary of the routine and baseline monitoring schedule frequencies is presented in Table 1. <br />Table 1. Monitoring Frequencies t't <br />Routine Monitorin Baseline Moni[orin <br /> <br />Month Flow / <br />Level Field <br />Parameters Laboratory <br />Anal sis a~ <br /> Janua <br /> Febma <br /> March <br />Rising Limb -April 3 to May 13 Aril X X <br />Peak Flow -April 21 to June 26 Ma X X <br />Low Flow -July 10 to October 8 June X X <br /> Jul X X <br /> Au st X X <br /> S [ember X X <br /> October X X <br /> November <br /> December <br />1O Per discussion with J. Burnell, CDMG, 2005 <br />~~~ Site Specific Schedule <br />• <br />September 2006 HydroGeo, ]nC. <br />