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icon at three walls, manganese at thirtaea rolls, molybdenum at one roll, aelenlum at tro <br />wells, TDS at lourtean tells, and sulfate at eighteen calls. • <br />Table B provides a comparison of ground xater quality livestock standazda. Standazdn that <br />were ezeaeded aze p8 at three rolls, fluoride at three cello, TDS at one wall, and sulfate <br />at tro rolls. <br />Finally, rater quality analyses performed on samples obtained at the 9enaca II shop roll <br />(STCS) for this year rare compared against both human health and secondary drinking rater <br />e tandazda developed for ground xataz by the Colorado Dapaztment of eealth (GOOF, 19861. No <br />human health standazda rere a:ceaded, The COOS secondary standard for iron, 0.3 mq/1, was <br />ezcaeded once rith s wlue of 0.72 mq/1. The CDOE secondary standard for sulfate, 250 <br />mq/1, tae ezeeadad trice rith values of 390 and X00 mq/1. Well STCS hoe historically <br />ezhibited highas sulfate concentrations than the secondary Qrinkinq avatar standard for <br />this parameter. Sowawr, bottled rater is consumed at Seneca II. <br />Ground Water Quality S•••-•~-*~•. TDS wlues at nine walla displayed increasing TDS trends. <br />TDS trends at all other rolls rase either level or decreasing. Agricultural ground rater <br />ataadaids fox pe, fluoride, iron, manganaee, selenium, sulfate, and TDS rasa azcwded at i <br />certain monitoring wells. in the area surrounding Senate Ii, ground avatar is not being <br />pumped for irrigation or livestock catering purposes. The above Q1sNealOn is provided <br />only to serve as a eompazstiw basis to judge ground rater quality. Domestic rolls that <br />provide 6rinkinq water for local residents aza not Erom aquifers impacted by mining. <br />Mining at Seneca II ie not believed to be causing the degradation of any monitored <br />aquifer. <br />Surface Water <br />Table 9 lists pertinent information on all NPDES, stream, and eprinq monitoring sites at <br />the Seneca II Mine. A complete description of the surface rater monitoring program may be <br />found on Pagae 7-336 to 7-355 of the Seneca II PAP. NPDES Diechazga Pointe 002, 003, 006, <br />and 008 aza monitored raekly for field pazamatare (floc, temperature, pe, and electrical <br />conductivity) and monthly for NPDSS parameters. 00~ and 008 are monitored monthly only in <br />the tinter. Stream Monitoring Sites 1, 2, 3, and 5 are monitored for field pazametars <br />monthly from March Through October. All of these sites era saapled three times a year Lor • <br />full-suite rater quality. The lirst sample of the year is collected prior to the eprinq <br />8 <br />