Laserfiche WebLink
EUEIS-UGH <br />~~"" • RE~Es~!~~• IIIIIIIIIIIIIIIIIII <br />INC. <br />999 <br />"'"'~``"`"' SEP 2 5 1990 <br />_ - ~f <br />- ~ ~ 1ra7ern furls <br />_-___ _ ,~~,~r~ 7nc Mined Land <br />Reclamation Civision <br />September 24, 1°90 <br />'.1is. Hath;• Dolan <br />Cclcrsdc Department cf i7eslth <br />Water Quality Ccntrcl Division <br />Per wits snd Enforcement Secticn <br />4210 East llth Avenue <br />Den•:er, Cclcrsdo 80220 <br />RE: AldENDMENT TO NPDES PER1dIT #CO-0038024 <br />OUTFACE #024. SDHl - SURF.~CE DOWN-HOLE SUMP <br />Dear ~!s. Dcls^.: <br />Western Fuels-Utah her eby applies for sn sme.^.dment tc cur dischsr ge permit for <br />final discharge sampling location to be designated belo:v :eater fall structures <br />after Process Pend ~3 effluent. This ne:v lecsticr. will allow for increased solids <br />retention and aeration of the discharge effluent. The enclosed diagram, entitled <br />SDE#1 Discharge Monitoring Pt., shcws cur modified treatment system that <br />increases efficiency of solids and sulfide removal Prom our mine water influent. <br />Aeration structures include perforated 55 gallon drums placed below the effluent <br />discharge pipes at Process Ponds ?, 2 and 3, straw and hsy bale filters, srd <br />:•entilstion tubing placed ss water..°slls st :~sricus pcints beloav Pcnd 3. Test <br />results have shown that these structures ha•re c'.arified our mine water effluent <br />to meet chemical *IPDES parameters. <br />We also arsh to add aluminum sulfate (*Islco product E*l.4CT 7883 liquid; to our <br />influe.^.t process pond water for removal oP oil s.^.d grease. In;ection cf aluminum <br />sulfate :rill occur orl;• when elevated levels of ail snd grease are detected st the <br />in..°luent ..°lcw tc cur pond system. This flocculent will be used at ron-toxic <br />levels via a chemical injection system st the down hole sump area. A Material <br />Safety Dsta Sheet is enclosed sheaving in_°ormatien on the floccule.^.t product we <br />will be using. <br />Sincerely, <br />^- ~~ <br />!l4ursr i Shrestha <br />Senior Engineer <br />~4S:lgp <br />cc: Don L. Desrdor.°f <br />Tim Chervick <br />~andy Price, C'.SLRD <br />Suite #305 <br />ti05 Urban Street <br />L~kew~oal. Colonda 9U_'_8 <br />Telephone j0i~'9SY-96'b <br />Teleeopier 30V9S6-31y7 <br />