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Gettler-Ryan/Geostrategres(1) Project Tosco(i) <br /> 6747 Sierra Court,Suite 3 Project Number Tosco(Unocal)SS#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/22/01 13 29 <br /> Volatile Organic 8 Oxyganated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reporting Spike Source %ltl C RPD <br /> Analyte Result Limit Umts Izvel Result %REC Limits RPD Limit Notes <br /> Batch 1030037-EPA 5030E PIT <br /> Blank(1030037-BLK2) Prepared&Analyzed 03/12/01 <br /> Ethanol ND 1000 ug/1 <br /> 1,2-Dibromocthaiie ND 200 " <br /> 1,2-Dechloroethme ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Methyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 12-Dichloroethaned4 457 500 914 76-114 <br /> Surrogate Toluene-d8 521 500 104 88-110 <br /> 030037-BSI) Prepared&Analyzed 03/12/01 <br /> MW tert-butyl ether 520 200 ug/l Soo 104 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 501 500 100 76-114 <br /> Surrogate Toluene-d8 515 500 103 88-110 <br /> LCS(1030037-BS2) Prepared&Analyzed 03/12/01 <br /> Methyl tert-butyl ether 519 200 ug/i Soo 104 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 479 " 500 958 76-114 <br /> Surrogate Toluene-d8 520 " 500 104 88-110 <br /> Matrix Spike(1030037-MS1) Source L103050-06 Prepared&Analyzed 03/12/01 <br /> Methyl tert-butyl ether 490 200 ug11 Soo ND 980 60-140 <br /> Surrogate 1,2-Dichloroethane-d4 487 " 500 974 76-114 <br /> Surrogate Toluene-& 519 Soo 104 88-110 <br /> Matrix Spike Du (1030037-MSD1) Source L103050-06 Prepared&Analyzed 03/12/01 <br /> Methyl tent-butyl ether 499 200 ug/l 500 ND 998 <br /> 60-140 1 82 25 <br /> Surrogate 1,2-Dichloroethane-d4 484 500 968 76-114 <br /> Surrogate Toluene-d8 515 500 103 88-110 <br /> Alk <br /> Qla Analytical- San Carlos The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Thu analytical report must be reproduced in its entirety <br /> Page 24 of 25 <br />