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STATE OF COLORADO <br />DIVISION OF MINilAlS AND GFOLOGT <br />~ W+nmmi d rv pn,,U Rvun•cq <br />I J U Sncnan V. [W„ , 21 S <br />nrn..,, C~le.em !7201 <br />n,on~. not, A6d ~ ~ s s2 <br />u:: nnn al:.a: x <br />Dale: <br />To: <br />From: <br />SubjeC.: <br />Seotamber 10. 1999 <br />Jim Dilllo <br />C;: f/~ -i <br />Harty Posey ' <br />Raviaw of TR-26 Response. BMRI, San Luis Proleet; M-Bti-. t2 <br />olrlsioM Or <br />MINERALS <br />-~- <br />GEOLOGY <br />AGCIAIlA7lOM <br />XINIry G•{I/(TY <br />a.. r>r~ <br />c~.r~,. <br />GM L W~KMf <br />w,.A.. a~r«,« <br />w,wr~ ~ ww <br />o~ryM1, Dine <br />¢eneral Comment 1, h 19 reeognlzed that the only surface water quality excardenae <br />are }or suNete end manganese. It Is understood that these exceadancrs Dose aeethetk: <br />risks only, not human hoaftfl risks. It appears that most of TR-26 and the TR-26 <br />responses a.rt at reducing concentrations of sulfate and manganese In ground and/or <br />surface water. The operator should recognize that conoentratons of several elements <br />In some bacMlll wolfs rxceod either surfacr water standards, groundwater numeric <br />protection levels, drinking water or agdculture etandarda. Cancentretions of Mn and <br />50. routirnfy rxcred drinking water standards, but so also does F. Thr following <br />parameters do not meet either surface water, drinking water or agriculture stanaatds for <br />at least one sampling of one well: AI, Ag, As, lie, B, G, Cr, Fe, NH4, Hg, NI, Nt3~-NOS, <br />Pb, pH, and Zn. Ths proposed treatment Systems must address these elamrnls as well <br />ac Mn and SO.. <br />COMMENTS ON NANOFILTRATIOWREvERSE OSMOS-S SYSTEM <br />Information rscrlvrd In BMRI's letter of August 271ndicate that chemcals Induding <br />NaOH, CaO, and HCI will accompany the ROManoflftration process. If volumes of <br />these chemicals stored on sde are to be significant, iCmay be necessary to bond for <br />their maintrnance yr removal. Whet maximum quantites of tnrsa eF+emicds will br <br />stored on sitar Wherefiow will they be srored7 Will other chemicals I>• n~e~ssaryl <br />so, which chrmkal entl what maximum quantities may br stored on sitar <br />