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Sequoia Walnut CreNek CCBA 94 98 <br /> (925)988-9600 <br /> FAX(925)988-%73 <br /> Analyticalwww sequotalabs co <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite I Project Number Tosco#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 20-Oct-00 15 26 <br /> �-—- - Volatile Organic Compounds liy EPA Method 8260B- Quality Control - <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lurut Uruts Level Result %REC Limits RPD Lmut Notes <br /> Batch 0J09013-EPA 5030B [Prfl <br /> US(OJ09013-EM) Prepared 8t Analyzed 04-Oct-00 <br /> Methyl teat-butyl ether 444 20 ug/1 500 888 70-130 <br /> Surrogate Dtbanmofluoromed mre 500 " Soo 100 50-150 <br /> Surrogate 1 2-Dtehloroedmne-d4 450 SO 0 900 50-150 <br /> Matrix Spike(OJ09013-MSI) Source W009589-06 Prepared&Analyzed 03-Oct-00 <br /> Methyl tert-butyl ether 449 20 ug/1 500 ND $98 60-150 <br /> Surrogate Dibroinofluoromethane 470 " Soo 940 50-150 <br /> Surrogate 1,2 Dichloroeihane-dF 400 Soo 800 50-ISO <br /> Matnx Spike Dup(OJ09013-MSDI) Source W009589-06 Prepared&Analyzed 03-Oct-00 <br /> Methyl tort-butyl ether 474 20 ug/1 500 ND 948 60-150 542 25 <br /> Surrogate Drbrmmofluoromethane 480 500 960 50-ISO <br /> Surrogate 1 2-Dtehlamethane-d4 410 SO 0 820 50-ISO . <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordmrce with the churn o <br /> custody documenL This analytkal report mast be reproduced in its etrit-W <br /> Page 19 of 23 <br />