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<br />been halted. When water is again discharged through NPDES 008, which we expect [o <br />occur sometime during the latter portion of the 2~td Qtr of 2002, we will immed_ iatcly <br />resume the accelerated WGT testing. <br />2) RequestedW;G.T.,Inalosendsatnplesofthefailedtestwaterstoouranalytical <br />testing lab, AGZ of Steamboat Springs so that they can run a metal suitewith a low <br />detection threshold of abouf5 ppb. [4tetals include As, Gd, Cr, pb, Ni; Ag, Zn, Na, and <br />K. , <br />• <br />• <br />3) 2equested W.G.T., Inc. to conduct bench top aeration tests -on, the. first <br />accelerated saipple collected 2 Jan 2002. Separate batches of water we[e,aerated for <br />four (4) hours and twenty (20) hours before a Cenodaphnia WET test Resultsahow <br />both aeration :periods produced no mortality in 100% after.48 hours Mr: Rawlings <br />believes. tliat,our,trouble may arise because what we are discltaiging is.aransi[ioning <br />from agroiitidwater to surface water stability state. He also stated thatihe high TDS <br />values may;:ezacerbate-the stress that Ceriodaplmia .undergo during the_ stability <br />transition phase: He has drafted a summary memo based on WEG's comments, and the <br />results of both the failed WGT tests and his bench top testing. A copybf his memo is <br />attached to this letter as Appendix A <br />4) Stmt in-house design work ofsimple modification methods based onincreasing <br />surface residence time and / or aeration of water to be discharged from NPDES 008, <br />whenever it is7eactivated. <br />5) Conduct additidnal testing, design, etc as results and conditions warrant: <br />This is what we cprrently know and how we intend ro proceed for the next sever2l months; WPC <br />will keep you informed as to our progress. As always, subsequent findings.maymodify or <br />invalidate the steps listed above. <br />Meeting fhc State compliance standards is very important to WI=C, and as such, we will find an <br />answer to the problem of the Failed NPDGS OOS WLT tests. <br />.Sincerely, <br />"foray d ins - <br />Mine ' ~ginecr <br />