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Lnapter Iv <br /> These permits, as approved, require Mid-Continent to monitor point discharge <br /> points for flow, total dissolved solids, iron, manganese, pH and oil and grease, and <br /> to send in quarterly reports. <br /> b. Ground Water. <br /> Ground water in the permit area is being monitored using ground water <br /> observation wells in order to detect adverse water quality and changes in the <br /> ground water flow system (Exhibit IV-C-1). The alluvial well system is primarily <br /> used to detect changes in the ground water flow system (Exhibit IV-C-1). The <br /> alluvial well system is primarily used to detect changes resulting from surface <br /> facility impacts. The wells are also being monitored for static water levels to <br /> determine If the base flow ground water component is, or will be, depleted by the <br /> mining operations. The fifteen wells in the mine plan area (See Exhibit VI-C-1), are <br /> measured and sampled bi-annually. In addition, ground water observation wells <br /> will be installed in refuse and tunnel spoil disposal areas to detect if infiltrating <br /> water is leeching undesirable minerals from the spoil. The wells will also check <br /> pore water pressure which, if it does exist, will provide an early warning that the fill <br /> could be structurally unsound. See Appendix III-E-2, Figure III-E-2, and Table <br /> III-E-1 for ground water quality data. <br /> Field Tests Lab Test <br /> Flow Bicarbonate <br /> Temperature Sulfate <br /> pH Sodium <br /> Conductivity Calcium <br /> Chloride <br /> Magnesium <br /> Sodium Absorption Ratio <br /> Iron <br /> Total Dissolved Solids <br /> c. Surface Water. <br /> Mid-Continent has been collecting surface water samples from up to ten <br /> monitoring points on a monthly basis since 1977, and from three points since <br /> 1974. Now that water quality data base has been established, the company will <br /> continue to collect samples from six key monitoring points: Nos. 3, 5, 20, and <br /> Sutey 1, 2 and 3) as indicated on Exhibit IV-C-1. The three Sutey points were <br /> added in 1984 for the new coal refuse pile area. In addition to measuring flow, <br /> tests are done to determine the amounts of the following substances in each water <br /> sample: <br /> Field Tests Lab Test <br /> Flow Bicarbonate <br /> Temperature Sulfate <br /> pH Sodium <br /> Conductivity Calcium <br /> Chloride <br /> Magnesium <br /> Sodium Absorption Ratio <br /> Iron (Total Recoverble for NPDES) <br /> Total Dissolved Solids <br /> Total Suspended Solids <br /> 23 <br />