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• • <br />CYPRUS ORCHARD VALLEY COAL CORPORATION <br />1993 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONfTORING DATA <br />STATION: P180i <br />Field Date <br />Parameters 08/25/9 07/15/9 <br />Flow Rate (cfs) 0.0000 0.0000 <br />Water Level 1 /31u11 1 /4 full <br />Tem rature C <br />Conductiv' umhos/cm <br />H <br />Lab; <br />Parameters <br />Alkaliri as CaCO3 m f <br />Bicarbonate as CaCO3 m I <br />Carbonate as CaCO3 m <br />Calcuim, dissolved m A <br />Chbride (mg/I) <br />ConductFi @ 25 C° umhos/cm <br />H <br />Hardness as CaCO3 m A <br />M nesium, dissolved m I <br />Sodium, dissolved m <br />SuHate (mcyl) <br />TDS Ratb ravJcab. <br />Solids, total dissolved m <br />Solids, total su nded m <br />' Monitoring of Pond 18-1 was temporaNy suspended effective 1994 (see TR-24). Pond 18-1 overlies an area of the East mine inactive since 1986 and <br />outside the potential subsidence zone given mine development to date. Monitoring of Pond 18-1 will be renewed 1 year pdor to further development of <br />the East mine with quarterly flow, field parameter, and water level measurements and an annual water quality sample. <br />