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, <br /> Sequoia 404 a CA Lane <br /> Walrtut Geek CA 94548 <br /> 4 (975)988-9600 <br /> a- F„ Analytical FM(925)988-9673 <br /> www sequoialabs rot„ <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite] Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager W Skip McIntosh 01-Dec-00 1f577 <br /> MTBE by EPA Method 8260A - Qual,ity Control <br /> _ Sequoia Analytical - Walnut Creep <br /> , a <br /> r n <br /> Reporting, Spike Source %REC RPD <br /> Analyte 1 Result r Limit Units a Level Result %REC Limits RPD Limit Notes <br /> 4 <br /> Batch OK30023-EPA 5030B[PIT] <br /> Blank(OK30023-BLK1) Prepared&Analyzed 29-Nov-00 <br /> Methyl tert-butyl ether ND 1 2 0 Ug/1 <br /> r <br /> Surrogate Dibromofluoromeihane 49 0' 500 980 50-150 <br /> Blank(OK30023-BLK2) Prepared&Analyzed 30-Nov-00 <br /> Methyl tert-butyl ether ND s 20 ugll y <br /> , <br /> Surrogate Dibromofluoromethane St 49 0 1 500 980 50-150 <br /> r <br /> LCS(OK30023-BSI) , 1 11 ” Prepared&Analyzed 29-Nov-00 " <br /> Methyl Cert-butyl.ether 466 N 20 ug/1 500 d 93 2 9" 70-130 , <br /> Surrogate Dibromofluoromethane 490 T+ '�, 500 980 ,, 50-150 <br /> 1 <br /> LCS(OK30023-BS2) Ir Prepared'&A„nalyzed 30-Nov-00 <br /> Methyl tent-butyl ether 45 2 20 ug/1 h, 500 90 4 70-130 - <br /> + <br /> Surrogate Dibromofluoromethane ' 490 11, ' ' " ' Soo ' 1 :980 , SO-1 SO <br /> 'Matrix Spike(OK30023-MSI) Source W011535-03 'Prepared&Analyzed 30-Nov-00 <br /> Methyl tert-butyl ether t;' 48 7 tY, T"2 0' 1 ug4 500 ND 974 60-150 <br /> Surrogate Drbromofluoromethane Soo, 500 100 50-150 <br /> Matnx Spike Dup (OK30023-MSDI) " Source+,WO11535-03 Prepared&Analyzed 30-Nov-00 <br /> Methyl tert-butyl ether 512 20 ugfl 500 ND 102 60-150 501 25 <br /> ' h <br /> Surrogate Dihromofluoromethane 520 SO 0 104 50-150 <br /> 1 <br /> r <br /> a <br /> r , <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analwed to accordance with the chain <br /> custody document This analytical report must be reproduced in its entre <br /> Page 5 of 6 <br /> ` r <br />