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• <br /> Gettler-Ryan/Geostrategres(1) Project. Tosco(1) <br /> _6747 Sierra Court,Suite 3_ Project Number Tosco(Unocal)SS#6981 Reported <br /> Dublin CA,94568 - - Project Manager Deanna Harding -- - - 63/22%01 13-29 <br /> Volatile Organic 8 Oxyganated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spike source %RF.0 RPD <br /> Analyte - Result limit Units Level Result %PEC limits RPD limit Notts <br /> Bateb 1030035-EPA 5030B [PIT] <br /> LCS(1030035-BS2) Prepared&Analyzed 03/14/01 <br /> Methyl tett-butyl ether 463 200 ug/l 500 926 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 493 500 986 76-114 <br /> Surrogate Toluene-d8 493 500 986 88-110 <br /> Matrix Spike(1030035-MSI) Source L103050-02 Prepared&Analyzed 03/09/01 <br /> Methyl tett-butyl ether 528 200 ug/1 500 ND 106 60-140 <br /> Surrogate 1,2-Dichloroethane-d4 511 Soo 102 76-114 <br /> Surrogate Toluene-d8 498 500 996 88-110 <br /> Matrix Spike Dup(1030035-MSDI) Source L103050-02 Prepared&Analyzed 03/09/01 <br /> Methyl tert-butyl ether 522 200 ug/1 Soo ND 104 60-140 1 14 25 <br /> Surrogate 12-Dtchloroethane-d4 511 " 500 102 76-114 <br /> Surrogate Toluene-d8 498 500 996 88-110 <br /> Batch 1030037-EPA 5030B [PIT} <br /> Blank(1030037-BLKI) Prepared&Analyzed 03/12/01 <br /> Ethanol ND 1000 u9/1 <br /> 1,2-Dibromodbanc ND 200 " <br /> 1,2-lhchloroethane ND 200 " <br /> Eh-isopropyl ether ND 200 " <br /> Ethyl tent-butyl ether ND 200 " <br /> Methyl tat-butyl ether ND 200 " <br /> Tat-amyl methyl ether ND 200 " <br /> Tat-butyl alcohol ND 100 " <br /> Surrogate 12 Dichloroethane-d4 463 " 500 926 76-114 <br /> Surrogate Toluene-d8 521 500 104 88-110 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the char <br /> AW <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 23 of 25 <br />