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• Enviro — Chem, Inc. • <br />1214 E. Lexington Avenue, Pomona, CA 91766 Tel (909) 590-5905 Fax (909) 590-5907 <br />LABORATORY REPORT <br />CUSTOMER: Worldwide Waste Services <br />3770 Grand Avenue <br />Pomona, CA 91766 <br />Tel(909)597-2999 Fax(909)597-2995 <br />PROJECT: PNP - Stockton <br />DATE SAMPLED:DB/17/11 DATE RECEIVED:08/19/11 <br />MATRIX:SOIL DATE ANALYZED:08/20-29/11 <br />REPORT TO:MS. LISA ULLOA DATE REPORTED:08/26/11 <br />SAMPLE ID: Soil, Rock LAB ID: 110819-23 <br />---------------------- <br />AQUATIC TOXICITY TESTING <br />---------------------------------------- <br />METHOD: STATE OF CALIFORNIA DEPARTMENT OF FISH AND GAME APPROVED <br />PROCEDURES USING PIMEPHALES PROMELAS (FATHEAD MINNOWS) <br />RESULTS: 5% MORTALITY RATE AT 750 mg/L CONCENTRATION <br />(95% SURVIVAL) <br />0% MORTALITY RATE AT 500 mg/L CONCENTRATION <br />(100% SURVIVAL) <br />0% MORTALITY RATE AT 250 mg/L CONCENTRATION <br />(100% SURVIVAL) <br />THEREFORE, LC -50 > 750 mg/L <br />COMMENTS <br />mg/L = MILLIGRAM PER LITER = PPM <br />> = GREATER THAN <br />ANALYSIS WAS PERFORMED BY ASSOCI WABORATORIES, ORANGE, CA <br />DATA REVIEWED AND APPROVED BY: <br />ENVIRO-CHEM'S CAL -DHS ELAP CERTIFICATE No.: 1555 <br />