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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday,June 15, 1004 <br /> Attention Rita Koehnen <br /> Port of Stockton Report Page 11 of 14 <br /> P O Box 2089 <br /> Stockton, CA 95201-2089 <br /> Total Petroleum Hydrocarbons-Gasoline <br /> Sample Information <br /> Sample ID- Trip Blank Sample Type. Grab <br /> Laboratory ID 0401800-06 Project Name Port of Stockton UST Site No 3 <br /> DatelMme Sampled 21-May-04 09 50 by Jun Neal Sample MatrLr Ground Water-Non Potable <br /> Test Parameter Result DLR Una Dilution Batch Prepared Analysis Date Method Notes <br /> TPH-Gasoline ND 100 ugll 1 AF41505 27 May-04 28-May-04 LUFT GC/MS <br /> Surrogate 4-Bromofluorobenzene 95% 75-125 <br /> mgL=indirgrams per Luer-ppm DLR=Detection Limo for Purpose ofReponing <br /> u9E-micrograms per I iter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits <br /> PECT)=ULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 77-13 N Wev lane ''idle R2 Sinc kton CA 95210 shone (209) 477-8105 Fax (209) 477-8148 <br />