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relationship between turbidity and aldrin-dieldrin <br />concentrations in a moving fresh water stream. <br />Have you ever published in those areas? <br />A. No. <br />Q. Do you know how many tons of soil leave an <br />average American corn field according to the U.S. <br />Department of Agriculture? <br />A. No. <br />Q. Don't you think that would be a good figure to <br />have in mind when you are talking about the rela- <br />tive pollution of Iowa corn streams?... <br />A. I don't see the need to know that figure. <br />Q. Did you have any data on the distance an <br />aldrin or dieldrin molecule can be transported in <br />various size streams? <br />A. No. But I would guess it could go from one end <br />to the other. <br />Q. You have no data on that, do you? <br />A. No. <br />Q. You have no information on how far this <br />molecule could travel in a highly turbid drainage <br />ditch or turbid Iowa stream of 500 cfs, do you? <br />A. No. <br />Q. Doctor, do you have any example of a number in <br />parts per million or pounds per day for any formu- <br />lating plant in the Midwest at any time of the <br />year? <br />A. No. <br />Q. Do you have any number for the pounds per day <br />or parts per million from any municipal outfall in <br />the Midwest. <br />A. No. <br />20