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819 Striker Ave Ste 8 <br /> 5,icramento CA 9814 <br /> (D Sequoia (9161921 9600 <br /> FAX(91 6)92 1-010D <br /> Anah tical www sequoialabs com <br /> ci-Ryan-Petaluma Project Tosco 11192 Stockton,CA ti212235 <br /> N McDowell Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 Project Manager Jed Douglas 02/05/03 11 52 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %R1✓C Limits RPD Limit Notes <br /> Batch 2120262-EPA 5030B(P/'i <br /> Matrix Spike Dup(2120262-MSD I) Source 5212231-02 Prepared&Analyzed 12/16/02 <br /> Benzene 10 3 0 50 ug/l 10 0 ND 103 60-140 2 25 <br /> Toluene 10 5 0 50 100 ND 105 60-140 1 25 <br /> Ethylbenzetie 102 0 50 100 ND 102 60-140 0 25 <br /> Xylenes(total) 29 9 050 30 0 ND 100 60440 07 25 <br /> Methyl tort butyl ether 118 2 5 10 0 ND 118 60-140 2 25 <br /> Surrogate a a a-Tnfluorotoluene 118 100 118 60-140 <br /> - <br /> I <br /> I <br /> or <br /> ia Analytical-Sacramento <br /> Vie results in this report apply to the samples analyzed in arcordancc with the chain of <br /> custody document Unless other+vise slated results are reported on a++et i+eight bases <br /> This analytical report must be reproduced in its entirety <br /> Page 11 of 14 <br />