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- Wolf Creek Overburden/Wadge Underburden. Three wells are used to <br />monitor this stratum. Well 7 is located below the Wolf Creek pit. It <br />displays an increasing TDS trend, although recently it has stabilized. <br />Well 8P1 is located below a reclaimed portion of the Wadge pit in the <br />southwest corner of the permit area. The TDS values for this well has <br />stabilized. Well 11 is located just west of the PeaCoCo Pond, below a <br />reclaimed portion of the Wadge pit. It displays a decreasing TDS trend. <br />- Trout Creek Sandstone. Well 5 is used as the potable water supply for <br />the Seneca II Mine. It displays a stable TDS trend. <br />- Spoils. Three wells monitor the spoils above NPDES 002. Well 25, the <br />upper well, does not display a distinct TDS trend. There was not enough <br />water in this well to sample since May 1997. Well 26, the middle well, <br />displayed an increasing TDS trend until 1990/1991, but has decreased <br />since then. Well 27, the bottom well, displays an increasing TDS trend. <br />Well 61 is located in the southwest portion of the permit area. It <br />displays a stable TDS trend. Well 62 is located above NPDES 004. It <br />also displays a stable TDS trend. <br />Comparison of Ground Water Quality to Water Use Standards. SCC has <br />compiled a list of ground water standards for agricultural uses (Table <br />5). This list is composed of Colorado Department of Health ground water <br />standards (CDOH, Aeg. 41, March 19991. <br />Table 6 provides a comparison of ground water quality data this year to <br />agricultural standards. This Paradox database generated table does not <br />include the units of concentration (mg/1 or ug/1) for each parameter. <br />The units used for each parameter are the same as those listed on the <br />standards table (Table 5) and are also the same as those used in the <br />water quality reports. The frequency column on Table 6 indicates the <br />number of exceedences out of the total number of samples (i.e., 1/2 <br />indicates one exceedence out of two samples) . Below is a summary of <br />standards that were exceeded. Given in parenthesis is the source and <br />use of each standard. <br /> <br /> <br /> <br />8 <br />