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Q. Well, could you try -- how many days? <br />A. With considerable frequency. It is not un- <br />common. Several times a year, at the approrpiate <br />seasons; sometimes a couple of times a week it's <br />happened. <br />Q. Would you identify that for the record and <br />tell me what you see, whether you recognize that? <br />(indicating) <br />A. Yes, I recognize it. It is a publication, <br />1969, by the Iowa Academy of Sciences, entitled <br />"Water Resources of Iowa." <br />Q. Now I direct your attention to figure 8, done <br />in exactly the same method. I understand this <br />figure, Doctor, and I ask you to correct me if I am <br />incorrect, we can expect a four-inch rainfall in a <br />24-hour period once in five years; is that correct? <br />A. Yes sir. <br />Q. Thank you. <br />The second example of a witness leaving his area of knowledge was <br />probably the fault of his lawyers, who assisted in the drafting of an overly <br />broad written statement. The witness was attempting to rebut an EPA position <br />in the Aldrin/Dieldrin hearings that much if not most of the residues of these <br />pesticides come from agricultural runoff rather than point sources. The Shell <br />Chemical Company was attempting to show that sloppy handling by formulation <br />and fertilizer blenders was the cause of the pollution. (If this were so, the <br />argument goes, EPA could reduce pollution measurably by enforcement actions <br />against certain plants and would not need to ban the pesticide. Another more <br />immediate purpose was to throw doubt upon the EPA studies showing high <br />residues in those agricultural areas in which Aldrin is used.) A company <br />chemist was put in the uncomfortable position set forth below (Rogers <br />1974:19-21): <br />Q. Are any of your publications related to the <br />material you talk about in your statement? <br />A. No. <br />Q. So to shorten this up you have never published <br />in the fields of -- stop me if you have, I am just <br />going to read a list, aquatic toxicology, kinetics <br />of Aldrin/Dieldrin degradation, the absorption of <br />Aldrin/Dieldrin to soil particles, erosion <br />problems, the fate and effect of Aldrin/Dieldrin in <br />fresh water moving stream environment, or the <br />19