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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday,April 19,2005 <br /> Attention: Doug Heard <br /> Kleinfelder,Inc. Report Page 8 of 17 <br /> 2825 Myrtle St. <br /> Stockton, CA 95205 <br /> Extractable Petroleum Hydrocarbons by 8015 DRO-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %R-EC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AD51915-Solvent Extraction <br /> Blank(AD51915-BLKI) Prepared&Analyzed: 19-Apr-05 <br /> TPH-Motor Oils ND 5000 ug/kg <br /> rng'L=milligrams per Liter=ppm DLR=Detection Limit for Purpose of Reporting. <br /> ugiL=micrograms per Liter-ppb Exceptional sample nmtrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> "43 N. [4''est Lctlae . Suite 132 Stockton G-1. 95210 rtholie: (''0>l I/?-8105 Fax: (209) / %-81d,N <br />