Laserfiche WebLink
Western Fuels Effluent 008 Fathead Acute May 2006 <br />Program run on 06-19-2006 at 16:44:34 <br />LTS CALCULATED USING THE BINOMINAL METHOD <br />------------------------------------------ <br />CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> EXPOSED DEAD DEAD PROB.(PERCENT) <br /> <br />100 -------- <br />40 ------------ <br />2 -------------- <br />5.00 ------------- -------- <br />LESS THAN 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 />IF THE PROBIT SLOPE IS NEGATIVE, ENTER THE DATA AGAIN <br />USING THE NUMBER ALIVE INSTEAD OF THE NUMBER DEAD. <br />r 1 <br />L_J <br />RESULTS CALCULATED USING THE PROBIT METHOD <br />----------- ------------------- ----------- --------------------------------------- <br />GOODNESS OF FIT <br />ITERATIONS G H CHI-SQUARE PROBABILITY <br />---- <br />----------- <br />5 ------------------- <br />40.838 ----------- <br />1.000 ----------------------------------- <br />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 RES ULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />C , <br />J <br /><l <br />