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<br />L~~ COMMEACIALTESTIN6 d ENOINEERINOCO. <br />DISCi~SSION,; <br />In February of._2003 the quarterly.Whole•Effluent.Toxieity:iest-failed for Ceriodaphnia+dubia. <br />Two subsequent accelerated tests also failed, thereby establishing a "pattern of toxicit}~' and <br />triggering;the automatic compliance schedule. set forth in.dischazge site.62's NPDES:permit. <br />~.. _ . <br />However, the:results of this PTI did not indicate any toxicity in any characterization tests or the <br />baseline degradation and initial toxicity tests. It is a fair assumption to say that the toxicity <br />spontaneously~disappeazed:between the final accelerated fest;on:March 7,.2p03,and the PTI start- <br />up on March 23;; 2003.::: Most akely. the toxicity. exhibited in: Site. 62 effluent was diluted by <br />spring runoff or a wet event.. ;. .- .< < :.::, .:. . <br />. ... ;3].x. n ..5 .. .. ..< <br />1 <br /> <br />~~~ <br /> <br />