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fall back down co 1040 mq/1. Monitoring at Well WW15 was discontinued is October, 1995 <br />for the same reason as given above for Wall WOV15. Wall WW16 displays on iacreae iaq TDS <br />tread. Wall WW17 exhibits a level TDS trend, is spite of an anomalously high TDS value in <br />Mny, 1995 (1710 mq/1). Subaequant TDS values at this well fall with is tae historic <br />range. Wall WW18 was discontinued is October, 1995 due to a semplinq ballet that was lost <br />down the well and she fact [hat is not downgradient of mining. <br />Comparison of Cround Water Quality to Water Dse Standards. SCC has compiled lie[• of <br />standards for irrlgation (Table ,} and livestock (Table 61. These lists are composed <br />mostly of Colorado Department of Hea1tL (CDOH) standards, although other ageaciae' <br />etaaderda have been used if they are more stringent or if the CDOH has no standard for e <br />particular Darametaz. Sea 9CC'e Yoaet Mine Permit ADDlicatioa, Tables 7-21 and 7-Z3, for <br />s more detailed explanation of these standards. <br />Table 7 Drovidae a comparison of ground water quality to irrigation standards. Standards <br />that ware exceeded are boron (one wall), chlorides (one well), pH ([ro tells), fluorides <br />(one tell), iron (too tells), manganese (eight ee(ls), dissolved solids (five walls), and <br />sulfates (trelva walla). Ia addition, one tell Lad chromium end lead values [Let Mara <br />Dolor the detection limit which is turn ras greater tLan the standard. <br />Tebl• 8 provides a comparison of ground water quality Co livestock standards. Standards <br />that were exceeded are fluorides (two we11s1, pH (two we11s1, disso lead solids lone wall(. <br />end sulfates (one well). <br />At the Seneca II~W shop well (Well 201TC1, CDOH drinking Ovate: standards were used to <br />determine its suitability. The secondary standard for iron IG.3 mg/1) was exceeded titL <br />values of 7.16 and 1.95 mq/1. '*he secondary standard for manearese (0.05 mq/11 tea <br />exceeded with values of 0.16 and 0.11 mq/1. However, bottled water is consumed at Seaece <br />II-W. Also, since the aquifer for tae shop well (Trout Creek Sandstone) starts at 280 <br />feet below tae Wedge Coal and is separated by conf iaiaq shale layers, pater from this Nell <br />should not be affected by mining and, therefore, reflects the natural characteristics of <br />tae aquifer. <br />Tab 7 of the Seneca II-W PAP contains a section that diecussea tae suitability of using <br />water from the various aquifers monitored at the Seneca 1I-W Mine for irrigation or • <br />6 <br />