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n <br /> Sequoia 819Striker q�eSteR <br /> Sacramento CA 91$11 <br /> (916)921 9600 <br /> Analytical FAX(916)921-010o <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project Fortner Unocal 5098,Stockton,CA S308091 , <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA, 94568 Project Manager Deanna L Harding 08/20/03 16 56 <br /> _ Gasoline Hydrocarbons (2-Methylpentane to 1,2,4-Trimethylbenzene) by EPA 8015M - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3080144-EPA 5030B (PIT) T <br /> Blank(3080144-BLKI) Prepared&Analyzed 08/12/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Surrogate aa,a-Trtfluorotoluene 114 100 114 60-140 <br /> Blank(3080744-BLK2) Prepared&Analyzed 08/13/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Surrogate a a,a-Trfluorotoluene 856 100 86 60-140 <br /> Laboratog Control Sample(3080144-BS]) T Prepared&Analyzed 08/12/03 ' <br /> Purgeable Hydrocarbons 252 50 ug/l 250 141 70-130 <br /> Surrogate a a a-Triuoratoluene 030 100 93 60-140 <br /> Laboratory Control Sample(3080744-BS2) Prepared&Analyzed 08/13/03 <br /> Purgeable Hydrocarbons 255- 5o U911 250 102 70-130 <br /> Surrogate a a a-Trac luorotoluene 103 " 100 103 60-140 <br /> Matrix Spike (3080144-MSI) Source 5308091-21 Prepared&Analyzed 08/12/03 <br /> Purgeable Hydrocarbons 234 50 ug/l 250 ND 94 60-140 <br /> 6urrogate a a a-Trtfluorotoluene 897 0 10 0 90 60-140 <br />--Matrix Spike Dup(3080744=MSDl) Source5308091-27 Prepared&Analyzed 08/12/03 <br /> Purgeable Hydrocarbons 249 50 ug/l 250 ND 100_ 60 140_ 6 25__ <br /> Surrogate a a a-Trtfluorotoluene 8 85 100 88 60-140 <br /> �S <br /> Sequoia Analytical - Sacramento The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety ' <br /> Page 94 of 117 <br />