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• <br /> Gelder-Ryan/Geostrategtes(1) Pro)-t Unocal(4) <br /> 6747 Sierra Court,Suite 3 Proieet Dumber Former Unocal SS#F2859/1665 Pacific Ave Rep=Yed <br /> Dublin CA,94568 Peoixt M-9- Deanna Harding 0681/01 I2 03 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- San Carlos <br /> Repum9 gpax Source %REC RPD <br /> q {yu Revell Lumt Units Level Resuh %REC Lmm RPO Law Nota <br /> Batch 1060034-EPA 5030B PIT <br /> Blank(1060034-BLK2) Prepared&Analyzed 06/11/01 <br /> Ethanol ND 1000 ug/I <br /> 42-Dibromoethanc ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> 133-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Tat-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND too <br /> Surrogate 1 2-Dichloroethane-d4 405 " 300 810 76-114 <br /> gate Toluene-d8 533 Soo 107 88-110 <br /> LCS(1060034-BSI) Prepared&Analyzed 06/08/01 <br /> Methyl tert-butyi ether 391 20 ug/1 500 782 70-130 <br /> Surrogate 1 2-Dechloroethane-d4 430 500 860 76-114 <br /> Surrogate Toluene-d8 517 " 500 103 88-110 <br /> LCS(1060034-BS2) Prepared&Analyzed 06/11/01 <br /> Methyl tert-butyl ether 546 20 ug/I 500 109 70-130 <br /> Surrogate 1 1-Dichloroethaned4 413 Soo 846 76-114 <br /> Surrogate Toluene-d8 483 Soo 966 88-110 <br /> Matrix Spike(1060034-MS1) Source L106029-01 Prepared&Analyzed 06/08/01 <br /> Methyl tert-butyl ether 457 20 ug/l 500 ND 914 60-140 <br /> Surrogate 1 2-Dichlomethaned4 470 " 500 940 76-114 <br /> Surrogate Toluene-d8 531 Soo 106 88-110 <br /> Matrix Spike Du (1060034-MSDI) Source L106029-01 Prepared&Analyzed 06/08/01 <br /> Methyi tert-butyl ether 459 20 ug/I 500 ND 916 60-140 0 219 25 <br /> Surrogate 12-Deehloroethane-d4 476 " Soo 9S2 76-114 <br /> Surrogate Toluene-d8 538 500 108 88-110 <br /> 0 <br /> Sequoia Analytical-San Carlos The results in thu report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its enarety <br /> Page 19 of 20 <br />