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ak s WESTERN BIOASSAY LABORATORIES <br /> Date: November 4, 1992 <br /> To: Mr. Jeff Hess <br /> Environmental Solutions, Inc. <br /> 2815 Mitchell Drive, Suite 103 <br /> �1 Walnut Creek, CA 94598 <br /> From: Linda S. Mortensen <br /> Hazardous Waste Testing Specialist <br /> �C�\Julianne C. Fegley <br /> Laboratory Coordinator <br /> Subject: Aquatic Toxicity Testing Results for Hazardous Waste 'Testing <br /> Project Number: 92-797 <br /> SAMPLE MATRIX AND I.D.: One solid sample #11371 (Wood Debris) <br /> Project No. 92-797. <br /> TREATMENT DILUTIONS (mg/L): 250, 500, 750 and Control run in soft <br /> water of 40-48 mg/L hardness and in duplicate with 10 fish/6 L tank and 20 <br /> fish/treatment. <br /> TESTING PERIOD: Received 10/30/92; Tested 10/30/92-11/3/92. <br /> BIOASSAY TEST(S): Fathead minnow (Pimephales promelas) 96-hour static <br /> Hazardous Waste Toxicity. <br /> METHODS: ATT's hazardous waste aquatic toxicity test protocol based on <br /> "Standard Methods for the Examination of Water and Wastewater", 16th <br /> Edition, American Public Health Association, 1986; California's Title 22 <br /> Code, Section #66261.24; "Static Acute Bioassay Procedures for Hazardous <br /> Waste Samples" (Polisini and Miller, 1988), California Department of Fish <br /> and Game; and as certified by the State of California's Department of Toxic <br /> Substance Control (CA. EPA). <br /> 2950 Buskirk Avenue, Suite 120•Walnut Creek,CA 94596 <br /> Laboratory: (510) 686-3215 Sales: (510) 947-4525 FAX: (510)934-0418 <br />