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toxicity to the aeriodaphnia; however, on January 15, 19900 <br /> the results for the fourth quarter bio-monitoring were <br /> received and these tests showed no toxicity to either the <br /> ceriodaphnia or fathead minnows. Although a THE is <br /> presently being conducted for the discharge, no conclusive <br /> evidence has yet been generated to determine what is causing <br /> the intermittent toxicity; however, the test of October 1, <br /> 1989 run on the HRL 100 (Guar Gum) rules out this substance <br /> as being a factor in the toxicity. <br /> A third requirement of the Department of Health was an <br /> as-needed cleaning of the 016 pond series. A larger <br /> dragline has been employed to fulfill this requirement. <br /> Field notes indicate that the first pond in the 016 series <br /> needs cleaning approximately every ten weeks. The last <br /> cleaning of the 016 ponds occurred on January 26, 1990. <br />