Po those which may exist in the Coluxabis up to dilutions waich are many, many times these waich will oceus in tho river, and this gives us an opportunity to seo that tho higher levels where Gamage may bagin to appear; and if we run it high enough, we can see at what level this escurs, and wo can cutrapolate bach into these much lover, lovier levels. This is the sort of result we get. ( tee (si de) I would like to point out that these ere not snort-torn ocunporimenis, These are long-term chronic studies. The same sert of thing that these organisms aro actually snubgected to in the Colundia River is shovm. We liko to use salmon,azain, because of the econonic valve, but also because this species is annarently. the most sensitive we have in the Columbia River. We started out with the ezzs in the fall at the sane time the ecss are derositedc, Ve incubate these and we travel then through the larvae and into the ficserling stages and wa keep thon into the troughs until normal nigration time, until time to fo downstrean, Obviously, the ecss are very littie affected. Ve bezin to see effects during the fry stase in tho high levels, and these continues into tho finzerlins stages. The concentration of the Coluubia River Range rust be below this area in throuch This is a growing effect of tho effluent. ranges, factors. It includes the temneratur It incivides a factor which I did not mention as far u) It includes a11 of the 0 in the Colunodia., Those are considcrably sreater than we have P here (indicating).