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Western Fuels Effluent 008 Fathead Acute May 2006 <br />gram run on 06-19-2006 at 16:44:34 <br />RESULTS CALCULATED USING THE BINOMINAL METHOD <br />------- <br />CONC. --------------------- <br />NUMBER ---------- <br />NUMBER ---------------- <br />PERCENT ------- <br />BINOM ----- <br />IAL -------------- <br /> EXPOSED DEAD DEAD PROB. (PERCENT) <br />------------ <br />------- <br />100 --------------------- <br />40 ---------- <br />2 ---------------- <br />5.00 ------- <br />LESS ----- <br />THAN -- <br />0.001 <br />75 40 2 5.00 LESS THAN 0.001 <br />50 40 0 0.00 LESS THAN 0.001 <br />25 40 0 0.00 LESS THAN 0.001 <br />12.5 40 2 5.00 LESS THAN 0.001 <br />AT A CONFIDENCE LEVEL OF 95 PERCENT, THE BINOMIAL TEST <br />SHOWS THAT THE LC50 IS ABOVE 100 <br />THE USEFULNESS OF ANY LC50 CALCULATED FROM THIS SET OF DATA <br />IS QUESTIONABLE BECAUSE A CONCENTRATION-EFFECT RELATIONSHIP <br />HAS NOT BEEN DEMONSTRATED OVER A REASONABLE RANGE (e.g. <br /><37 TO>63 OF PERCENT DEAD <br />NEITHER THE APPROXIMATE LC50 CALCULATION NOR THE MOVING <br />AVERAGE METHOD CAN BE USED WITH THIS SET OF DATA. <br />EITHER THE HIGHEST CONCENTRATION KILLED LESS THAN 50 <br />PERCENT OR THE LOWEST KILLED MORE THAN 50 PERCENT. <br />THE PROBIT SLOPE IS NEGATIVE, ENTER THE DATA AGAIN <br />~ING THE NUMBER ALIVE INSTEAD OF THE NUMBER DEAD. <br />RESULTS CALCULATED USING THE PROBIT METHOD <br />-------------------------------------------------------------------------------- <br />GOODNESS OF FIT <br />ITERATIONS G H CHI-SQUARE PROBABILITY <br />-------------------------------------------------------------------------------- <br />5 40.838 1.000 4.161 0.245 <br />SLOPE _ .1694002 <br />95 PERCENT CONFIDENCE LIMITS = -.9131475 AND 1.251948 <br />LC50 = 5.41486E+12 <br />95 PERCENT CONFIDENCE LIMITS = 1296.504 AND + INFINITY <br />LC1 = .1002349 <br />95 PERCENT CONFIDENCE LIMITS = 0 AND 27.34858 <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />C~ <br /> <br />