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Gettler-Ryan/Geostrategies(1) ]PrglecL Unocal(4) - <br /> 6747 Sierra Court,Suite 3 PtnJect Number Former Unocal SS#2859/1665 Pacific Ave Reported ;. <br /> 1~ <br /> Dublin CA,94568 Prolmt M8w9a' Deanna Harding 06/21/01 1203 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spite Source %REC RPD <br /> Analye Result Lsmt Units Level Rcsuh %REC Lrmits RPD Limn Notes <br /> Batch 1060034-EPA 5030B [P/T] u { <br /> Blank(1060034-BLK2) Prepared&Analyzed 06/11/0111-. — <br /> Ethanol ND 1000 ug/l <br /> 1,2-Dtbromoethane ND 20 " <br /> 1,2-Dichloroed=r ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tett-butyl etber ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Tett-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 12 Dichloroethaned4 405 " 500 810 76-114 <br /> Surrogate Toluene-d8 533 500 107 88-110 <br /> LCS(1060034-BSI) Prepared&Analyzed 06/08/01 <br /> McthyI tent-butyl ether 391 20 ug/i 500 782 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 430 Soo 860 76-114 <br /> Surrogate Toluene-d8 517 500 _ 103 88-110 <br /> LCS(1060034-BS2) - Prepared&Analyzed 06/11/01 <br /> _ _ <br /> Mothyl telt-butyl ether 546 20 ug/1 500 109 70-130 <br /> - Surrogate 1,2-Drchloroethaned4__ 423 — _- __- - 50 0 ------84 6 ---76-114-------=--- - — <br /> �Surrogate Toluene-d8 483 " 500 966 88-110 <br /> Matrix Spike(1060034-MSl) - Source:L106029-01 Prepared&Analyzed 06/08/01 <br /> Methyl tertbutyl ether 457 20 ug/l Soo ND 914 60-140 <br /> Surrogate 1,2-Dichloroethane-d4 470 " Soo 940 76-114 <br /> Surrogate Toluene-d8 531 500 106 88-110 <br /> Matrix Spike Du (1060034-MSDI) Source L106029-01 Prepared&Analyzed 06/08/01 <br /> Methyl Cert-butyl ether 458 20 ug/I 500 ND 916 60-140 0 219 25 <br /> Surrogate 1,2-Dichloroethaned4 476 " Soo 952 76-114 <br /> Surrogate Toluene-d8 538 Soo 108 88-110 <br /> Sequoia Analytical-San Carlos the results in this report apply to the samples analyzed in accordance with the cha ' <br /> custody document nis analytical report must be reproduced in its entirety <br /> Page 19 of 20 <br />