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indicates a relatively steady trend; however, the peak occurred in May <br />2004. <br />Spoil Spring 5 (WSSPGS) was first sampled in June 2006. It is located <br />above the large culvert that feeds into Pond 016. Its TDS plot indicates <br />a decreasing trend, with the peak occurring in May 2007. <br />Comparison of Surface Water Quality to Water Use Standards. SCC has <br />compiled a list of surface water standards for agricultural uses (Table <br />10). This list is composed of CDPHE surface water agricultural use <br />standards (CDPHE, Reg.31, November 2009). <br />Table 11 provides a comparison of this year's surface water quality, <br />including springs, to agricultural standards. This Paradox database- <br />generatedtable does not include the units of concentration (mg/l or <br />ug/1) for each parameter. The units used for each parameter are the same <br />as those listed on the standards table (Table 10) and are also the same <br />as those used in the water quality reports. The frequency column on <br />Table 11 indicates, in this order: uncensored, that is, the number of <br />exceedances above the Method Detection Limit (MDL) / the number of <br />exceedances between the MDL and the Practical Quantitation Level (PQL) / <br />censored, that is, the number of sample values below the MDL but the MDL <br />was higher than the standard / the total number of samples. Below is a <br />summary of standards that were exceeded. Given in parenthesis is the <br />source and use of each standard. Although the CDPHE does not <br />differentiate 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 />SCC chooses to use those ground water use standards classifications <br />(livestock or irrigation) for surface water use evaluation. Of all the <br />surface water sites downstream of Seneca II -W, only Sites WSDS (Dry <br />Creek), WSSF3 (Sage Creek), WSH7 (mid-Hubberson Gulch) and WSHF1 (lower <br />Hubberson Gulch) have their waters used for irrigation. Following is a <br />list of standards exceeded this year. <br />22 <br />