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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday,June 15, 2004 <br /> Attention Rita Koehnen <br /> Port of Stockton Report Page 6 of 14 <br /> P O Box 2089 <br /> Stockton, CA 95201-2089 <br /> Total Petroleum Hydrocarbons-Gasoline <br /> Sample Information <br /> Sample ID MW 3-4 Sample Type Grab <br /> Laboratory ID 0401500-03 Project Name, Port of Stockton UST Site No 3 <br /> Date/Time Sampled 21-May-04 14 40 by Jun Neal Sample Matrix- Ground Water-Non Potable <br /> Test Parameter Result DLR Unit Dilution Batch Prepared Analysis Date Method Notee <br /> TPH-Gasoline ND 100 ug/i 1 AF41505 27-May 04 27-May-04 LUFT GC/MS <br /> -Surrogate efet 4-Bromofluorobenzene 92% 75-125 <br /> 0 <br /> mg'L=milligrams per Liter=ppm DLR—Deleclion Lim uforPurpose ofReponing <br /> ug'L-micrograms per Luer=ppb Exceptional sample matrices or interferences moy <br /> result in higher detection limits <br /> *ECTFULLY SUBMITTED, <br /> Jonathan,Le,Laboratory Director <br /> 77J? Al Wart T n"a (Z7iiia R7 4Zfn1-lrfn" ( A 0;')I0 nlnnvto OnO) 177_91nS ?71- t'7(10) 477 Q1 IQ <br />