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® BLOCK ENVIRONMENTAL SERVICES <br />2451 Estand Way <br />Pleasant Hill, CA 94523-3911 <br />(925) 682-7200 FAX 686-0399 <br />Hazardous Waste Aquatic Toxicity Screening Test Results for <br />One Solid Sample (Client Job # CQK 0083 — PGEEI) <br />November 2007 <br />Prepared For: <br />Mark Smith <br />CLS Labs <br />3249 Fitzgerald Rd. <br />Rancho Cordova, CA 95742 <br />BES Sample #24548 <br />Prepared By: <br />Block Environmental Services, Inc. <br />2451 Estand Way <br />Pleasant Hill, CA 94523-3911 <br />(925) 682-7200 <br />November 13, 2007 <br />Nanette Malan Lake David Block Ph.D. <br />Laboratory Manager Laboratory Director <br />