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Wedge Overburden. Well 42, located in the south central part of the permit area, usually <br />• does not have enough rater in its casrng to sample, as was the case this year. <br />Milliequivalent data from previous samples has been included in Appendix C. <br />Wedge Coal. Two wells are used to monitor the water quality o£ this Stratum. Well 17 is <br />located just west of NPDES 002. The TDS trend since 1990 appears to be stable. Well 19 <br />is located in the southwest part of the permit area. It displays a decreasing TDS trend. <br />wolf Creek Overburden/Wedge Underbuzden. Three wells are used to monitor this stratum. <br />Well 7 is located below the Wolf Czeek pit. It displays an increasing TDS trend. Well <br />SP1 is located below a reclaimed portion of the Wedge pit in the eouthxest corner of the <br />permit area. The TDS trend for this well has stabilized. Well 11 is located just rest of <br />the PeaCOCO Pond, belox a reclaimed portion of the Wedge pit. It displays a decreasing <br />TDS trend. <br />Trout Creek Sandstone. Well 5 is used as the potable rater supply for the Seneca II Mine. <br />It displays a stable TDS trend. <br />• Spoils. Three wells monitor the spoils above NPDES 002. Well 25, the upper well, does <br />not display a distinct TDS trend. There aas not enough rater in this well to sample thin <br />year. Well 26, the middle well, displayed an increasing TDS trend until 1990/1991, but <br />has recently decreased. Well 27, the bottom xell, displays an increasing TDS trend. <br />Well 61 is located in the eouthaest portion of the permit area. It displays an increasing <br />TDS trend. Well 62 is located above NPDES 004. It displays an increasing TDS trend. <br />Comparison of Ground Water Quality to Water Use Standazds. 9CC has compiled a list of <br />standards for agricultural uses (Table 5). This lief ie co~osed mostly of Colorado <br />Department of Health (CDOtl) ground water standards as of April 1996, although other agency <br />standards have been used if the CDOtl has no agricultural etandazd £or a pazticulaz <br />parameter. Table 5 has footnotes to indicate rho source of each water quality standard. <br />Table 6 provides a comparison of ground rater quality to agricul rural standards. This <br />Paradox database generated table does not include the units of concentration (mg/1 or <br />• ug/1) fox each parameter. The unite used for each pazameter are the same as those listed <br />on the standards table ITable 5) and are also the same as those used in the water quality <br /> <br />