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qt> PACIFIC [CO RISK <br />Donna Keller <br />GeoAnalytical Laboratories, Inc. <br />2300 Maryann Dr. <br />Turlock, CA 95380 <br />ENVIRONMENTAL CONSULTING & TESTING <br />June 29, 2022 <br />Donna: <br />I have enclosed our report "A California Title 22 Hazardous Waste Acute Toxicity Evaluation of <br />a Waste Sample" for the sample designated Soil-la that was collected on May 3, 2022 and <br />delivered to our testing laboratory on May 5, 2022. This sample was submitted under <br />GeoAnalytical Lab Report # 12E0306 as listed on the chain-of-custody form. The results of this <br />evaluation are summarized below: <br />The 96-hour acute LCso value of the sample Soil-la was >750 mg/L, which is greater than the <br />Title 22 Hazardous Waste classification threshold of 500 mg/L, as defined by CA Title 22 CCR <br />§66261.24. Accordingly, this sample should not be considered hazardous waste with respect to <br />acute aquatic toxicity. <br />If you have any questions regarding this testing or the report, please contact me at (707) 207- <br />7760. <br />Sincerely, <br />Digitally signed by <br />Alison Briden <br />Date: 2022.0629 <br />15:13:50 -0700' <br />Alison Briden <br />Sr. Aquatic Toxicologist <br />Pacific EcoRisk is accredited in accordance with NELAP (ORELAP ID 4043). Pacific EcoRisk certifies <br />that the test results reported herein conform to the most current NELAP requirements for parameters for <br />which accreditation is required and available. Any exceptions to NELAP requirements are noted, where <br />applicable, in the body of the report. This report shall not be reproduced, except in full, without the <br />written consent of Pacific EcoRisk. This testing was performed under Lab Order 36581. <br />2250 Cordelia Road, Fairfield, CA 94534 phone: 707.207.7760 fax: 707.207.7916 www.pacificerorisk.com <br />1/15