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<br />CHADWICK 8t ASSOCIATES, INC. <br />3 February 1994 S37S Seu1h Sycamon Street, Sulre tOt <br />Llttietos, Colorado !0120 <br />Theae(IOS) 79~-SS~O <br />]im IMnaamtn Ea: (yea) 79~-SO~1 <br />Ken Cal Co. <br />1130 Coaatry Ad. 29A <br />Box 4B7 <br />1Valdw, Colorado 80460 <br />Dear Mr. Mossroao: <br />~+ <br />i <br />~~ <br />~~ <br />J <br />Enclosed are the results of the tnxirity tetra performed from 20 to 2ll Ianuary 1994. A Cerlcdgphtda <br />survival sad lepreductiotStasCand a fathAd minnow survtvat and Qtoa~ teat were performed ttr ettimtaa <br />the chronic responses produced by the 7 hour Kerr Cori dischazgs 002 oa 19 January 1994. The <br />Cerlodaphnla test was run until 607E of the wtmols released 3 broods of young and tathcad minnow tea! <br />was run for 7d. A wpy of the Culurarlu CDPS WET uttrunic lmt rupurt furor has bwu included for each <br />tat. Florae fill in the appropriate sxtions (e.g. outfall r1, IWC) before submittfag, <br />Teat procedures genaelly followed Colorado Department of Health guidelines (1993), with the <br />following exception. Since thin outfall had a limited discharge period. the '7-0ay' chronic feet had ~ <br />be aura with only one sample armpnsiteri from the 7 hn of discharge. Renewals could rant he mllectad <br />on alternate days sine there was no further dischuge. This tnoditfcatloa of test coedldoes wu approved <br />by the Colorado Depaament of Health following diaeuaaiom with Kathy Kalirnan. <br />Thu rte:lwal table sumtaarizra the rraults of truth [rata. The fathead minnow cltrouiC tact lndlcatcd uo <br />chrottic wxicity. However, chronic effects were observed at the l00% treatmetrt with CerlaGaphntd. An <br />NOEC (no observable effect concentration) of 7596 effluent wu obtained, with an iC25 of fi89i for the <br />sub-lethal bloa-ass (number of young produced divided by numbs of females exposed) parameter. LC30 <br />levels rnuld nor he determined for CirindapJuria nr fathead minnrrwa slot! significant trrnt7allty was rant <br />ObaarVad la elthaT CIIIODiC tNt. <br />If you have any questiom, please don't hesitate w ult. <br />Sittacely, <br />CHAD do ASSOCIATES, iNC. <br />~~ <br />Steven P. Cantos <br />Senior Viw Praaldmt <br />SPGme <br />Enclaaure <br />a~b.e d, <br />Aeeyttae Paper <br />