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` . <br /> PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Tuesday,April 19,2005 <br /> Attention: Doug Heard <br /> Report Page/6of]7 <br /> Kleinfelder,Inc. <br /> 2825 Myrtle St. <br /> Stockton, CA 95205 <br /> Total Petroleum Hydrocarbons-Diesel Range-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC 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-Diesel ND 1000 ug/kg <br /> LCS(AD51915-BSI) Prepared&Analyzed: 19-Apr-05 <br /> TPH-Diesel 9800 1000 ug/kg 10000 98 75-125 <br /> Matrix Spike(AD51915-MSI) Source:5041812-01 Prepared&Analyzed: 19-Apr-05 <br /> TPH-Diesel 9200 1000 ug/kg 10000 0.00 92 75-125 <br /> Matrix Spike Dup(AD51915-MSD1) Source:5041812-01 Prepared&Analyzed: 19-Apr-05 <br /> TPH-Diesel 9220 1000 ug/kg 10000 0.00 92 75-125 0.2 20 <br /> mg/L=milligrams per Liter=ppm DLR=Detection Limit for Purpose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane. Suite B2 Stockton CA. 952.10 vhone: (209) 477-8105 Fax: (209) 477-8148 <br />