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<br />SENT BY: BOR-WCAOS SD; <br />nC"'[,lll'lU: O"lg-"Dj IU:ill:'''''.; <br /> <br />B-16,96 4:56PM; 970 385 6539 -> <br />., BOR,W~DS ID: '23 <br /> <br />303 866 4474; <br /> <br />#22/22 <br /> <br />SWQDINMED S\lIIIII18rY <br />August 12, 1996 <br />Page 20 <br /> <br />River, These lnflow con<:entrations coupled with the re5el'VOU'S shallow wateR, probable eutrophic <br />conditions and a1aa! populations should increase the methylaJion potential for Hg.., The extent of <br />HI! bioaccumulation cannol be ~lillbly predicted, but would probably ranie between 0.3 and 1.0 <br />~glg." <br /> <br />"If the trout fishery were ultimately manased as a seasonal put--and.talce mh~, bioaccuml1lation <br />of Hg duriDg this &bort-term el>.-posure to the system would not Rl3ult in signifkant conceD1Jations <br />orRS in their flesh. This would be abovg the New Mexico public health standard (0,1 /olglg) for fish <br />ccmsumpCioD, but would probably not llxeecd the FDA standard of 1.0 /olglg. Hg bioaccwnulauoll <br />could be of puticular concern to raptors such as bald east'"' that Ite expected to feed on fish from <br />the re&erYoir." If put-and-talce trout will exceed the New Mexico public helsIth standard for fish <br />consumption, it can be logically assumed that lifetime-resident fish could bioal:cwuula.te much <br />higher concentrations of mercury. <br /> <br />The Assessment states tha1 "[oluce selenIum is in the sediments, mobili~tion processes can pIO~ide <br />pathways 10 cycle selenium back into the foed chain. Such processes include oxidatinn IU)d <br />methylation ofinorgllllic and Olianic selenium by plant r001S and microori8Disms, biological m.ixing <br />and oxidation of sedlments from lnlrrowing by benthic: invertebrates, a.cc:umulation by rooted plants, <br />and llccumulatiOlJ of sediment-u~iated selenium by benthic inver1cbralCll BIld detrital feeding <br />fishes, Thus. vvli'1'ents commonly 5erVe a~ only 8 tl!mpnflfV r~sitolY for selenium," [Emphasis <br />added} <br /> <br />The Water Quality, the Hydrology and the Soils and Trace Element Analysis appendic:es all <br />summari1A: QOUtcUld data in ways that largoly disguise the magnitude of fulun: water quality <br />problems in the L. Plata River, These sl1llllJWi.zations 81e further summarized in the FSFES and <br />gener.alJy c:onelude that no problems will occur. This Project will CRu:IC additional and more Krious <br />violatioDs of water quality ltandards in the La Plara River, Ii\er equilibrium is reached, The effeclS <br />on the water quality of tile La Plata River wiU be far greater prior to tha1 time, <br /> <br />71) <br />Il.,,!> <br />