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Energy has since regained ownership of this property, and will be able <br />to sample this well again in 2010. It previously displayed a slightly <br />increasing TDS trend. <br />- Spoils. Two wells monitor the spoils above NPDES 002. Well 26, the <br />upper well, displayed an increasing TDS trend until 1990/1991, but have <br />decreased since then. Well 27, the lower well, displays an overall <br />increasing TDS trend, however, TDS values peaked in 1998. <br />Well 61 is located in the southwest portion of the permit area. It <br />displays a decreasing TDS trend. Well 62 is located above NPDES 004. <br />It recently displays a stable TDS trend (SF 0.5). <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 Public Health and <br />Environment ground water standards (CDPHE, Reg. 41, May 2008). <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/l 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 />Parameter <br />pH (CDPHE, irrigation) <br />Fluoride (CDPHE, irrigation) <br />Iron (CDPHE, irrigation) <br />Manganese (CDPHE, irrigation) <br />Selenium (CDPHE, irrigation) <br /># of Wells / # of Excursions <br />2/2 <br />2/2 <br />2/2 <br />10/17 <br />1/1 <br />6 <br />• <br />• <br />•