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noted that the site on Grassy Creek (SSGl) that is upstream of Seneca II <br />discharges also experienced exceedances of the 0.2 mg/1 standard. <br />Spoil Spring 6 exceeded the cadmium, nickel and manganese agricultural <br />standards. However, this spring eventually flow into NPDES Pond 002, <br />which does not exceed any of these parameters. <br />Table 12 shows the CDPHE receiving stream standards for Fish Creek <br />(Yampa Segment 13b). Table 13 provides a comparison of those standards <br />to water quality data collected this year from NPDES4 and Site SSC10 in <br />the Fish Creek basin. The stream standards for Fish Creek are based on <br />aquatic life standards, even though there are no fish present in the <br />tributary that NPDES4 discharge into. Standards that were exceeded are: <br />Parameter # of Sites / # of Excursions <br />Sulfide 1/1 <br />One sample from NPDES4 exceeded the sulfide standard, 0.002 mg/l un- <br />ionized, with a value of 0.0109 mg/1. The analytical method detects both <br />dissolved sulfides and acid-soluble metallic sulfides present in <br />suspended matter. It is suspected that a large portion of the sulfides <br />detected is of the latter type, which would bias the un-ionized results <br />high. Any dissolved sulfides present in surface water should eventually <br />oxidize to sulfates. <br />In September 2003, the CDPHE resegmented Grassy Creek from Yampa Segment <br />12 to Segment 13e. Regulation 33 was further revised in December 2005 <br />and August 2008. Table 14 shows the new CDPHE receiving stream standards <br />for Grassy Creek. Table 15 provides a comparison of those standards to <br />water quality data collected this year from NPDES and stream sites in <br />the Grassy Creek basin. Standards that were exceeded are: <br />Parameter # of Sites / # of Excursions <br />Iron, Total Rec. 5/8 <br />Nitrite <br />Selenium <br />1/1 0 <br />1/2 <br />18