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Moun(ain Coal Company 1999 Annual Hydrology Report Wes( Elk Mine <br />• <br />Table 6 <br />Underdrain and Mine Water Monitoring <br /> Water uaG <br />Station Flow <br />Measurements Field Parameters Lab Analyses <br />LRP Underdains' J times per year 3 lima per year Annually <br />RPE Underdmms 3 times per year 3 times per year Annually <br />Mme Innows' ~ 3 Lima pcr year 3 times per year Annually <br />I Field parameters include pH, conductivity, and temperature. <br />~ Annual analyses during the third sampling period include laboratory analyses of pH, conductivity, total dissolved <br />solids (TDS), calcium, magnesium, sodium, SAR hardness, bicarbonate, chloride, un-ionized ammonia, <br />niMate/nitrite, phosphate (POa' as P), sulfate, iron (total and dissolved), manganese (total and dissolved), arsenic, <br />cadmium, lead, mercury, selenium and zinc. All parameers were analyzed for their dissolved form unless stated <br />otherwise. <br />J LRP and RPE Underdrain flows are sampled seasonally. <br />° Field parameters and a water sample will be obtained (and parameters per footnote p2 analyzed) if the inflow is <br />of sufficient discernable flow (>S gpm) and/or lasts longer than 7 days. If the inflow is continuous, an initial <br />sample will be obtained, and then sampled at least annually thereafter. <br />• <br />u <br />83i-031.520 Page 13 Wright Warer Engineers <br />