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~~cmcx <br />Scptemhcr21.2(K)-1 / -,;,~:;,~~:,~,... ,, ,,~e~~, <br />linca Crushv tJ <br />linvirunmcnad Protection Sltectalist <br />Colorado Division ul :\Lnctnls and Cicalogy vta Ccniticd Mml <br />I i I ~ ShCI'rtliut SL. R++0111 ~ 1 ~ Idcturn Rctcgn Rcyuestcd <br />Den+'cr. Colurallo Sll?ll : ,i lU^_ .J I tl UI N11 Site) ~' ~ ~ ~ <br />tiubject: Pcnnit \u, \I-77•Z(I8, ('cmex Lyons ('cment Planl, I.cun+ (luarry, ('e•ntcnt <br />Kiln Dust bisposal in ('-pit. <br />Dc;u I.nar <br />This Icuer comains Ceme~'s rcspunse to v:u•uws issues raised by the Division rel;tong to cement <br />kiln dust (CKDt disposal in C-pit at the I_yuns Quarry. Ccmcx and its consultants have reviewed <br />your June 2d, _'[NN ntstx,ction rcpurt. 1 carry Puscy's August '?6, 20(Y3 analysis of water quality <br />sumphng results. attended a meeting +vilh the Dtviswn un Scptcmttcr 3. ?(N>•3 and have rcvieoed <br />relevant lilt matcri;d and I,crnttl cundiuons. Several ticld investigations have a6u taken pL•ccc. <br />Ccmcx is committed to addresstng the fhvtstun's eoncems and rcductng or climinaung putcnual <br />impacts to +v'tldlife :md ground water rrsuurces. <br />Rev Actions -Taken to Dute <br />Sinrc the tmnal monitonng event in C-pit in .4pnl _'(NW (which show'cd elevated pll :md <br />sclcniuml Ccmcx h:u taken the fullowtng key actions: <br />- Ret:oned a wildlife csper, ground water gcuchcmist and pctntiuing consultants <br />- In~ututcd ht-ntunthly .,ampling and analysis in C-pit and :\-pit <br />- Started nronnonne the off-site Dakota Formation well <br />- Rcp:urcd and rcplaccd the pump in C-pit which had previously failed due to <br />mechanical and opcrauon;d pruhlems. <br />- 1'ur~h.tscJ ,~ hack-up pump fur ('-pit <br />• Comcncd to a floating pump to reduce sediment tnlakc <br />- :~ddcd water trcautnnt ;tt the pump tntakc to reduce calcium plaung <br />- Installed a staff gauge in ('-pn pond to mcasurc the retreat of the water level (the <br />water Icccl has dropped several Inches since the new pump was installcdl <br />Wildlife Assessment <br />The Division's June 24, ?(xW inspection report requested that a wildlil'c ;tssessmcnt he. done to <br />determine potennal impacts :md recirmntcnd :my nutigaliun that may he necessary.:1 wildlife <br />^ssessment repuil was delivered to the Division on Septemlxr 14. ?(103. <br />"fhc asscssntent Indic:ucs that potential intpurt to all types of ++ilJlilc is low to very low. <br />Further, no irnntcdiatc mnigatiun ++as deemed to he nccessar~ ahhough the author st:ncd that <br />some fencing and a gate would rrduce the potential for terrestrial species to gain access to the <br />i ersnw, rn taut ara nr: ~~ <br />