a largo amount of short-lived material. By alloying this material to decay for a short poried oer time cna retention basis, much of this is dissipated teform it is actualiy dischersed back into the Coluzpbia River. ° Vith respect to aquatic biolecy, thse Biolozy Socticn at Hanford hos been concerned with waat this material nay co back in 1945. n operating o ‘9 G2 o t-te vs u Ww Since a fow weebs aftor these reactor ct We have been studying the probien Hy to the Colunbin River life. We have a laboratory which is located in one of the precduction areas and cone of tho ways in which we study these er eifects is to essentially plvz this laboratory in: o the line. We have a continual sample of water Which is coming out fron this gevion waich is 2 soinz into tho river, ’ : and wo continually oo mee v biologically monitor this waste with acquatic organisms, paré ticularly young salmon Sinc? this is tho one that has the dollar Sign attached to it. Theso are run in terms of toxicity typa of studies. The second phase, of course, is our ficld monitoring provran waich is a sampling of the orsanisrs downstrean, Sust a moment on this laboratory sampling program. (Slide) This is a continual flew process we havo . where we have a nuaber of troughs Which are set up, and we bring in river water which is uncontaminated essentially -- also proper and appropriate anounts of the pile water dircethy iron the system, , set these up in a serics of dilutions ranging froa < w