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404 N Wiget Lane <br /> i Walnut Creek CA 94598 <br /> Sequoia (925)988-9600 <br /> FAX(925)988-%73 <br /> 9%0- Analytical www sequoialabs corn <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dubhn CA,94568 Project Manager Scott Polston 04-Oct-00 08 08 <br /> Total Purgeable Hydrocarbons (C6-02), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Splice Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Li nit Notes <br /> Batch 0I29004-EPA 5030B [P/TJ <br /> Blank(0129004-BLKI) Prepared&Analyzed 29-Sep-00 <br /> Purgeable Hydrocarbons ND 10 mg/m'Air <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 0 10 " <br /> Xylenes(total) ND 0 10 <br /> Methyl lert-butyl ether ND 0 50 " <br /> Surrogate aaa-Tri luorotoluene 550 600 91 7 70-130 <br /> LCS(0129004-BSI) Prepared&Analyzed 29-Sep-00 <br /> nzene t 73 0 10 mglm'Air 200 865 70-130 <br /> ene <br /> 173 0 10 200 865 70-130 <br /> Ethylbenzene 168 0 10 200 840 70-130 <br /> Xylenes(total) 506 010 600 843 70-130 <br /> Surrogate aaa-TnJluorotoluene 454 600 75 7 70.130 <br /> LCS Dup(0129004-BSDI) Prepared&Analyzed 29-Sep-00 <br /> Benzene 185 0 10 mg/m'Air 200 925 70-130 670 25 <br /> Toluene 1 87 0 to 200 93 5 70-130 7 78 25 <br /> Ethylbenzene 1 87 oto 200 935 70-130 107 25 <br /> Xylenes(total) 542 010 600 903 70-130 687 25 <br /> Surrogate aaa-Trr,Jluorotaluene 514 " 600 857 70-130 <br /> • <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the churn of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 5 of 8 <br />