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<br />SENT BY: BOR-WCADS SO; <br /> <br />8-16-96 4:49PM; 970 385 6539 -> <br />a> BOM-WCAOI 80; "'1 <br /> <br />303 866 4474; <br /> <br />#12/22 <br /> <br />I .._.._~....,~. ...'U".v, ''''.'''.i <br /> <br />SWQBINMED SummllI}- <br />August 12,1996 <br />Palle8 <br /> <br />Table A-I (page B-I07) This table sho....'S predic:ted levels of various trace metals under Pha.q: 1. <br />stage A fur avcr8ie, high and low flO\'o'1 in the Animas River. The model shows thaI selenium levd~ <br />will remain cons1ant in the Animal River at all New .Mexico stations under all flow regimes, a highly <br />questionable outcome. The levels of selenium (total or dissolved?) used for the model ( 4 to 5 j.lgIL) <br />are very con.istent and ve:y low, considering that the actual measured values found in Table 5e-2 <br />for the two New Mexico stations VlIlY from 2 to 33 ~GfL with an overall average of 11.9 uglL. This <br />table also IhoWl Imall-magnitude inctcue. in the levels of mercury (total or dissolved'?), AU <br />p,.kld 1ffMC*'1 U:vcls are /III order o//JlDfllilwk abolW "" New M.xico lI_rk wate, 'llUllit)l <br />SI/llUlIpd/or ttmIlmercllry. <br /> <br />Table A-3 (pap 8-109) This table lists predicted changes by percenta&e of several ttace elements <br />under Phase I, stase A for average, high and low flows in the Animas River. Mercury and selenium <br />are predicted to increase under 1he various flow reiimes in the Animas River. Mercury levels wUl <br />incn;a.sc by an 1JI10WU l'IIlIing from 0,6 to 4,4 pen:a11. Selenium levels will increase by IlD. amount <br />rinsing from 2,0 to 5,8 ~ent. The.~ predictions should be viewed with a great deal of skepticism, <br />considering the problems with the model di~ under the La P1ata River discussion. These two <br />contaminants are currently at levels in excess oftllC New Mexico water quality standaIds and aJl)' <br />increase would be unacceptable, These tables also IIhow si!!nificmt inaeases in levc:lli of copper and <br />arsenic. <br /> <br />Tables A-4 and A-S (pages B-l11/1 12) These tables show predicted levels of various trace metals <br />under Phase I, stage B for average, high and low flows in the Animas River and the predicted percent <br />chauges. Chlmget in pretlicted mercury Ieve1I will vary from a decuase of 1.7 percent to an incrtlISe <br />of 9 ,4 percent. SelwllUllcvcls will inclClilSC 11)- an BmOllat ranging from 7,0 to 21,8 percent, Again, <br />th_ predictions should be viewed with a great deal of skepticism, considering the problems with <br />the model discussed previously, These two contaminants are already at levels in excess of the New <br />Mexico water quality standards and any increase would be UlIIlCCeptable. These tables also show <br />si&:Diticant increllSl!S in levels of copp<< and arsenic. <br /> <br />Tables A-6 and A-7 (pages B-113/1l4) These tables show predicted levels ofvlrious trace metals <br />undCI Phue II fox average, high and low flows in the Animas River and lhe predieted percent <br />cbanies. Changes in predicted mercury levels will vmy mm a decrease of2.1 percent to an incIASe <br />of9.8 percent. Selenium IlMllswiU increasebyanamount~ tiom4.7 to 14.9 percent. Again, <br />these predictions should be viewed with a great deal ofskepticism. considering 1he problem! with <br />tht model discussed pn:vioUily, These two contaminants lite already at levels in elt~ss of the New <br />Mexico water quality S1lIndards. A:rJ.y increase v.vuld be unacceptable. These tables also show <br />significant incleases in levels of copper and arsenic. <br /> <br />The FSFES concludes from data summarized in this Appendix that "(bJwl.use the water quality in <br />the Animas River would not change significantly, thexe would be no effect to IKJUlltiC life or wildlife" <br /> <br />1/1 <br />!~!J <br />