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<br /> <br />TABLE 6. CHEMICAL PARAMETER JUSTIFICATIONS <br /> <br />Chemical Parameter Justification <br />Miscellaneous: <br />pH a characteristic of water needed to assess the <br />solubility ranges of the chemical parameters; a <br />characteristic of rock needed to assess <br />acid-base forming potential; effluent <br />limitations of Rule 4.05.2 (7 ). <br />Electrical Conductivity an indicator of the general quality of water; <br />an indicator of the salinity hazard associated <br />rock materials. <br />Temperature a characteristic of water needed to assess, <br /> solubility ranges of the chemical parameters. <br />Dissolved Oxygen an essential element for aquatic life; <br /> increases in major ion concentrations that may <br /> occur as a result of mining in the western U.S. <br /> (Everett, 1979) may affect the natural chemical <br /> oxygen demand, potentially causing oxygen <br /> depletion in a stream. <br />Total Suspended Solids an indicator of suspended sediment in a stream; <br /> effluent limitations from Rule 4.05.2 (7}; <br /> suspended sediment could act as a transport <br /> mechanism for toxic-heavy metals. <br />Total Dissolved Solids an indicator of the general quality of water; <br /> concentrations may increase in waters near <br /> surface mines in the western U.S. <br /> (Everett, 1974). <br />Total Combustible Solids an indicator of the fire hazard potential of <br /> underground mine refuse rock and coal <br /> processing wastes. <br />Oil and Grease an indicator of oil and grease leakage into <br /> surface waters. <br />Lithologic Classification an indicator of general rack texture and type. <br />Textural Analysis an indicator of textural variability; needed to <br />% sand assess erosiveness and suitability of rock <br />% silt material to be used as a plant growth medium; <br />~ clay an indicator of the infiltration and water <br />retention properties of spoils material. <br />