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4i. <br />s <br />x <br />.a <br />0 <br />r 1 <br />r <br />w <br />vi <br />j " <br /> <br /> <br />used in treatments and the rapid breakdown of <br />rotenone. Estimates of oral toxicity to humans are <br />300 to 500 mg rotenone per kg of body weight. Thus, <br />a 132 pound person would have to drink over 60,000 <br />liters (15,790 gallons) of treated water at one sitting <br />to receive a lethal dose. When a 1,000X safety factor <br />is included, a person could drink 14 liters of treated <br />water per day and still be well below the most <br />conservative safe intake level. <br />Q. What can people or municipalities who draw their <br />water from a lake or stream that is to be treated do <br />to avoid drinking rotenone treated water? <br />A. Normal treatment of water drawn from a lake or <br />stream should remove or destroy any traces of <br />rotenone. Charcoal filtration and chlorination would <br />both protect users from exposure to any rotenone that <br />might temporarily occur. Potassium permanganate <br />could also be added to destroy any rotenone that <br />might be present. <br />Q. How soon can people enter the treated water? <br />A. In 1981, EPA concluded "that there was no reason to <br />restrict the use of rotenone in waters intended for <br />irrigation, livestock consumption, and recreational <br />swimming uses". Even though there is no health risk, <br />