         tence 1:3 Ii should be noted that the toiicity (LCSO} of a  observed tt a rangefinding text may be significantly  rent from the toixkity observed in the follow-up chronic  itive test (1) the definitive text ts longer: and (2) the test  be performed with u sample collected at a different time,  possibly differing significantly bi the level of toxicity    2: The toxicity of a sample th the rangesfinding test  be exactly the ame as the toxicity tn the follow-up test.”