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4-19 <br />• from 1,000 to 6,000 mg/1. These limited data suggest an <br />increase in both dissolved-solids concentration and sodium <br />sulfate in the downstream direction. If so, groundwater <br />discharging to East Salt Creek within the permit area is of <br />extremely poor quality and is dominantly a sodium sulfate type. <br />Ground water quality, as shown in the above noted tables, <br />was established from the sampling of six alluvial ground <br />water wells as shown on Figure 2.3-5. This figure also shows <br />the location of wells to be utilized in future monitoring as <br />described in Section 2.6; the analyses from these wells are <br />shown in Table 4.5-12. <br />4.4.4 Impact of Mining on Ground Water <br />• The proposed mining in the Upper Carbonera seam and Cameo seam <br />as shown on Figures 2.1-9 and 2.1-5 will not have an impact on <br />the ground water within the permit area or adjacent areas. <br />The extent of mining by the year 1990 will not reach the area <br />where the Cameo seam is below the elevation of water saturation. <br />Only localized, perched pockets of water saturated coal seams <br />could possibly be encountered. <br />The upper Carbonera Coal seam is about 100 feet above the Cameo <br />seam and therefore encountering the saturated part of this coal <br />seam is reduced further. <br />Surface and groundwater monitoring programs are discussed in <br />detail in Sections 2.5 and 2.6. <br />• <br />