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0 <br />-> PA(Ifi( [(ORISK <br />Donna Keller <br />GeoAnalytical Laboratories, Inc. <br />2300 Maryann Dr. <br />Turlock, CA 95380 <br />Donna, <br />INVIRON.0 I' N IAL I'. 01l. i i:.\:;,, I li i I\,, <br />May 7, 2014 <br />I have enclosed our report "A Title 22 'Hazardous Waste' Toxicity Evaluation of a Waste <br />Sample" for the sample designated "Sludge -I" that was collected on April 16, 2014, and <br />delivered to our testing laboratory on April 22. <br />The results of this test indicate that the waste sample "Sludge -1" was not acutely toxic to fathead <br />minnows at the test treatment levels. The LC50 of this sample was >750 mg/L, which is greater <br />than the Title 22 "Hazardous Waste" classification threshold of 500 mg/L, and therefore, the <br />sample should not be considered a hazardous waste with respect to fish toxicity. <br />If you have any questions regarding this testing or the report, feel free to call my colleague Dr. <br />Scott Ogle or myself at (707) 207-7760. <br />This testing was performed under GeoAnalytical Lab Report # A4D2102. <br />Sincerely, <br />Digitally signed by <br />N Michelle Kawaguchi <br />p - Date: 3014.05.07 <br />14:15:54-08'00' <br />Michelle Kawaguchi <br />Aquatic Ecotoxicologist <br />Pacific EcoRisk is accredited in accordance with NELAP (ORELAP ID 4043). Pacific EcoRisk <br />certifies that the test results reported herein conform to the most current NELAP requirements for <br />parameters for which accreditation is required and available. Any exceptions to NELAP <br />requirements are noted, where applicable, in the body of the report. This report shall not be <br />B reproduced, except in full, without the written consent of Pacific EcoRisk. This testing was <br />performed under Lab Order 22423. <br />v, , <br />1/13 <br />