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<br />15 <br /> <br />Table 2. - Results of toxicity characterization usin~ TIE procedures. <br />LC'io2/ (%) and 95% confidence limits <br />Manipulation C. dubia Fathead minnow <br /> <br />Baseline toxicity test (this test <br />repeated twice for C. dubia) <br /> <br />21.0 (15.9-27.7) <br />20.3 (17.0-24.2) <br /> <br />> 100 <br /> <br />pH 11 adjustment <br /> <br />30.8 (24.0-39.4) <br />35.4 (24.9-50.2) <br /> <br />> 100 <br /> <br />pH 3 adjustment <br /> <br />> 100 <br /> <br />Aeration <br /> <br />17.7 (confidence <br />limits not reliable) <br /> <br />SPE <br /> <br />23.3 (17.2-31.6) <br />61.6 (48.0-78.9) <br /> <br />> 100 <br /> <br />Filtration <br /> <br />> 100 <br /> <br />Eluted SPE <br /> <br />> 100 <br /> <br />> 100 <br /> <br />EDTA (% survival in 100% <br />concentration) <br /> <br />100 <br /> <br />Sodium thiosulfate (% survival <br />in 100% concentration) <br /> <br />20 <br /> <br />1 The LC50 is the concentration of toxicant or test water in which there is <br />mortality to 50 percent of the test organisms. . . . <br />