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C��> P A C I F I C E C 0 R I S K ENVIRONMENTAL CONSULTING & TESTING <br /> Christina Ruiz September 17,2020 <br /> GeoAnalytical Laboratories, Inc. <br /> 2300 Maryann Dr. <br /> Turlock, CA 95380 <br /> Christina: <br /> I have enclosed our report"A California Title 22 Hazardous Waste Acute Toxicity Evaluation of <br /> a Waste Sample" for the sample designated S-2,S-3,S-4,S-4@2' Composite. This sample was <br /> submitted under GeoAnalytical Lab Report#GOG2208 as listed on the chain-of-custody form. <br /> The results of this evaluation are summarized below: <br /> The LC50 of the sample S-2,S-3,S-4,S-4@2' Composite was>750 mg/L, which is greater than <br /> the hazardous waste classification threshold of 500 mg/L, as defined by CA Title 22 CCR <br /> §66261.24. Accordingly,the sample should not be considered a hazardous waste with respect to <br /> acute aquatic toxicity. <br /> If you have any questions regarding this testing or the report, please call me at(707) 207-7760. <br /> Sincerely, <br /> Alison Briden <br /> Sr. Project Manager <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 32070. <br /> 2250 Cordelia Road, Fairfield, CA 94534 phone: 107.207.7760 fax: 707.207.7916 uuucu.paci iceroriik.corn <br /> 1/13 <br />