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C <br />; <br />Donna Keller <br />GeoAnalytical Laboratories, Inc. <br />2300 Maryann Dr. <br />"Turlock, CA 95380 <br />Donna, <br />11 <br />July 22, 2014 <br />I have enclosed our report "A Title 22 'Hazardous Waste' Toxicity Evaluation of Three Waste <br />Samples" for the samples designated: <br />• "1000 E Channel Mixing Area Green Liquid On Ground", <br />• "1000 E Channel Mixing Area White Liquid Under Mixer", and <br />"1000 E Channel Mixing Area Red Liquid". <br />These samples were collected on June 18, 2014, and delivered to our testing laboratory on June <br />26. <br />1000 E Channel Mixing Area Green Liquid On Ground: <br />The results of this test indicate that the waste sample "1000 E Channel Mixing Area Green <br />Liquid On Ground" was acutely toxic to fathead minnows at the test treatment levels. The LCso <br />of this sample was <250 mg/1_, which is less than the Title 22 "Hazardous Waste" classification <br />threshold of 500 mg/L, and therefore, the sample should be considered a hazardous waste with <br />respect to fish toxicity. <br />Please note that the test solutions that were prepared for "1000 E Channel Mixing Area Green <br />Liquid Oil Ground" initially had pH levels >pH9. The test method (Polisini and Miller 1988) <br />specifies that "alkaline samples with pH values greater than 8.5 may be adjusted with <br />hydrochloric acid to a pH of 8.5". In addition, "a second, pH -adjusted control may accompany <br />any bioassay in which the treatment pH has been adjusted." The test solutions were accordingly <br />adjusted to pH8.5 prior to testing and a pH8.5 Control was prepared and tested as well. <br />1000 E Channel_ Mixin -Area White Li uid Under Mixer: <br />The results of this test indicate that the waste sample "1000 E Channel Mixing Area White <br />Liquid Under Mixer' was r acutely toxic to fathead minnows at the test treatment levels. The <br />LC';o of this sample was >750 mg/L, which is greater than the Title 22 "Hazardous Waste" <br />classification threshold of 500 mg/1_, and therefore, the sample should not be considered a <br />hazardous waste with respect to fish toxicity. <br />1000 E Channel Mixing Area Red Liquid: <br />The results of this test indicate that the waste sample "1000 E Channel Mixing Area Red Liquid" <br />was acutely toxic to fathead minnows at the test treatment levels. The LCso of this sample was <br /><250 mg/L. which is less than the "title 22 "Hazardous Waste" classification threshold of 500 <br />mg/L, and therefore, the sample should be considered a hazardous waste with respect to fish <br />toxicity. <br />1/28 <br />