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PRECISION <br /> ENVIRQ-TECH <br /> Analytical Laboratory CERTIFICATE OFANAL YSIS <br /> Thursday,August 11, 2005 <br /> Attention Jack Bishop <br /> California Tank Lines Report Page 21 of22 <br /> P 0 BOX 6245 <br /> Stockton, CA 95206 <br /> I � <br /> Total Petroleum Hydrocarbons-Diesel Range-Quality Control <br /> Precision Enviiro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AF52813-Solvent Extraction <br /> Blank(AF52813-BLKI) Prepared&Analyzed 28-Jun-05 <br /> TPH-Diesel ND 100 ug/1 <br /> LCS(AF52813-BS1) Prepared&Analyzed 28-Jun-05 <br /> TPH-Diesel 620 100 ug/1 625 99 75-125 <br /> Matrix Spike(AF52813-MS1) Source 5062506-03 Prepared&Analyzed 28-Jun-05 <br /> TPH-Diesel 570 100 ugll 625 000 91 75-125 <br /> Matrix Spike Dup(AF52813-MSDI) Source 5062506-03 Prepared&Analyzed 28-Jun-05 <br /> TPH-Diesel 580 100 ug/1 625 000 93 75-125 2 20 <br /> I <br /> mg/L=milligrams per Liter=ppm DLR=Detection bmitforPurposeofRepornng <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits <br /> RESPECTFULLY SUBMITTED, <br /> ok�:Vol'z� <br /> Jonathan Le,Laboratory Director <br /> 774311 West Lane Saute B2 Stockton CA 95210 phone (209) 477-8105 Fax (209) 477-81.18 <br /> 64166 <br />