no major acersiation of radioactive materials in the botteon material which is basing picked un by the individual ovrganisns Sampiing for quantitative determinations -- we have the laboratory progran goirg on in terms of toxicity studics, but we are also aware that the salmon fry may not be tho most sensitive organism that we have te ceal with in the river, so we are interested in knowins whether any of the population in 4the river are koing aifected. This cets back to some quanti- tative type of samplinsts of river organisns, Ve started out taking cuantitative samples in a number of different stations which, as I nmentionod earlicr, were selected because we thought they were as near the hydrosraphic conditions as w2 could find thon, This gets to waat Dr, Patrick pointod out yesterday. Comparing one station to another, it requires a terificaliy large nunber of samples in order to try to make quantitative differences, These stations we looked at in terns of both numbers of species and also the quantity of individual species Which were involved. The species number compare quite favorably up and down, but we still get wide fluctuations in nuubers of organisms betveen different stations, This probably . - points out the kinds of differences that occur even in . -* \ \ Stations which are selected for similarity initially. ‘A * We have arranzed these things in terus of the activity ¥ . ° ‘density which wo find in the river water which is asseciated with those, so wa find that the stations clese to the Hanford 1 $