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(rpt •� rR <br /> N <br /> • <br /> Gettler-Ryan/Geostrategtes(1) Project Tosco(l) <br /> 6747 Sierra Court,Suite J Project Number Tosco SS#4409 Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 04/19/01 15 27 <br /> Volatile Organic 8 Oxyganated Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result limit Units level Result %REC limits RPD Lainit Notes <br /> Batch 1040038-EPA 5030B [PIT] <br /> LCS(1040038-BSI) Prepared&Analyzed 04/12/01 <br /> Methyl tert-butyl ether 479 200 ugll Soo 958 70-130 <br /> Surrogate 12 Dichloroethane-d4 485 500 970 76-114 <br /> Surrogate Toluene-d8 498 500 996 88-110 <br /> Matrix Spike(1040038-MSI) Source L104041-04 Prepared&Analyzed 04/12/01 <br /> Methyl tert-butyl ether 646 200 ug/1 500 614 117 60-140 <br /> Surrogate 1,1-Dichloroethane-d4 513 500 103 76-114 <br /> Surrogate Toluene-4 306 Soo 101 88-110 <br /> Matrix Spike Dup(1040038-MSDI) Source L104041-04 Prepared&Analyzed 04/12/01 <br /> Methyl ten butyl ether 652 200 ugA 500 614 118 60-140 0 924 25 <br /> Surrogate 1 2-Dichloroethane-d4 500 500 100 76-114 <br /> Surrogate Toluene-d8 505 " 500 101 88-110 <br /> Sequoia Analytical- San Carlos The results in this report apply to the Samples analyzed in accordance with the chain o <br /> mw <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 13 of 14 <br />