Laserfiche WebLink
causes for these concen.r.,, nq are not known, 1991 data appe ce typical of the <br />chemical behav;or of this and does not Indic'. .,yra - of water quality. <br />Bier to _:..e ', f„r cotr ar Jn of .ivality w 1 .stock water quality <br />standardq <br />Regarding analyses performed on c,- ecceu at surface water sites during . 1991 <br />er year .tle Draw and associated tributaries, as well water ,lieu dt <br />-DES 001 and 006 remained suitable for livestock drinking water. Refer to Table 10 for <br />comparison of surface water quality with livestock water quality standards. <br />Table 11 presents a comparison of Colorado Department of Health rec - 'wing stream standards <br />for stream Segment 5 of the San Miguel River, with total recoverable trace metal analyses <br />performed on samples collected during 1991 at the five Nucla Mine surface water monitoring <br />sites (Colorado Department of Health, 1983, Reviseu 1986; Table 7 -66, Tab 7, 1988 Nucla <br />PAP). Based on this table, exceedences were observed at two sites: 1) lead at NPDES 006 <br />and 2) manganese and iron at SW -N7. The high lead level in the September, 1981 sample at <br />NPDES 006 is unexplained; however, analysis for r oted sample also collected <br />in September at Site SW -N3 (downgradient of NPULS 006) was Less than the 25 ug;' star,Jard <br />set for this parameter (see Table 11). High • and iron levels at monitoring Site <br />SW -N7 are associated with the low flow and high suspended solids sample collected in <br />April, 1991. No exceedences were observed at SW -N3, the most downgradient surface <br />monitoring site, although manganese was very high in the April, 1991 sample. <br />18 <br />