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<br /> <br /> <br /> <br />CYPRUS ORCHARD VALLEY COAL CORPORATION <br />1993 ANNUAL HYDROLOGY REPORT <br />HYDROLOGY MONRORING DATA <br />STATION: P1804 <br />Field Date <br />Parameters 08/24/9 07/17!9 08/13/9 <br />Flow Rate (cts) 0.0000 0.0000 0.0000 <br />Water Level 3/4 full 1/41u11 D <br />Tem rature C <br />Conductiv umhos/cm <br />H <br />Lab : ::::: .::. ... <br />Parameters . <br />Alkalin' as CaC03 m I <br />Bicazbonate as CaC03 m I <br />Carbonate as CaC03 m / <br />Calcuim, dissolved m A <br />Chbride (mg/~ <br />Conductiv' @ 25 C° umhos/cm <br />H <br />Hardness as CaC03 m <br />M nesium, dissolved m I <br />Sodium, dissolved m A <br />Sulfate (mgA) <br />TDS Ratb ravJcalc. <br />Solids, total dissoved m /I <br />Solids, total su nded m <br />Monitoring of Pond 18-4 was temporarily suspended effective 1994 (see TR-24), Pond 18-4 overlies an area of the East mine inactive since 1983. No <br />retreat mining has occurred In the vicinity, Monitoring of Pond 18-4 will be renewed 1 year prior to funkier development of the East mine with quarterly <br />flow, field parameter, and water level measurements and an annual water quality sample. <br />