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Sump in the fall of 2011. Its TDS plot of previous data displayed a <br />decreasing TDS trend (SF = 0.5). <br />- Spoil Springs 6 and 10. These springs exist in the Wolf Creek coal <br />spoils. Spoil Spring 6 exists along the northwest edge of the Wolf Creek <br />pit and exhibits a decreasing TDS trend. Spoil Spring 6A monitors the <br />same drainage downstream where it meets the haul road. Monitoring at 6A <br />is not a PSCM requirement. This site was not checked this year, but no <br />flow was likely at the time when Spoil Spring 6 was checked. <br />Spoil Spring 10 was discovered in 1993. It exists along the southwest <br />edge of the spoils in the vicinity of the Wolf Creek pit underdrain, and <br />is normally sampled at the haul road culvert. It displays a slightly <br />increasing TDS trend; however, the peak TDS value occurred in May 2006. <br />Comparison <br />compiled a <br />10). This <br />standards <br />of Surface Water Quality to Water Use Standards. PSCM has <br />list of surface water standards for agricultural uses (Table <br />list is composed of CDPHE surface water agricultural use <br />( CDPHE, Reg.31, November 2009). <br />Table 11 provides a comparison of all surface water quality data <br />(including spoil springs) this year to agricultural standards. This <br />Paradox database generated table does not include the units of <br />concentration (mg /1 or ug /l) for each parameter. The units used for each <br />parameter are the same as those listed on the standards table (Table 10) <br />and are also the same as those used in the water quality reports. The <br />frequency column on Table 11 indicates, in this order: uncensored, that <br />is, the number of exceedances above the Method Detection Limit (MDL) / <br />the'number of exceedances between the MDL and the Practical Quantitation <br />Level (PQL) / censored, that is, the number of sample values below the <br />MDL but the MDL was higher than the standard / the total number of <br />samples. Below is a summary of standards that were exceeded. Given in <br />parenthesis is the source and use of each standard. Although the CDPHE <br />does not indicate between livestock and irrigation uses in their surface <br />water agricultural standards, they have done so in their similar ground <br />water agricultural standards (see Table 5). For the sake of discussion, <br />16 <br />