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Gettler-Ryan/Geostrategtes(l) <br /> PiJ-L Unocal(4) <br /> 6747 Sierra Court,Suite J Ptoleet Nimib- Former Unocal SS#2859/1665 Pacific Ave = <br /> Dublin CA,94568 Project M—a- Deanna Harding 06/21/01 12 03 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reponm8 Spilie Soiree %RW RPD <br /> lAnaW Result Lama un" 1"d Rewk 'YAW lamb: RPD Lmm Nays <br /> Batch 1060033-EPA 5030B PIT <br /> LCS(1060033-BS1) Prepared&Analyzed 06/07/01 <br /> Methyl tert-butyl ether 502 20 ug/I Soo 100 70-130 <br /> Surrogate 1 2-Dichloroethane-d4 501 Soo 100 76-114 <br /> Surrogate Toluene-a!8 505 500 101 88-110 <br /> LCS(1060033-BS2) Prepared&Analyzed 06/11/01 <br /> Methyl tett-butyl ether 462 20 ug/1 500 924 70-130 <br /> Surrogate 12-Dichloroethaned4 500 500 100 76-114 <br /> Surrogate Toluene-d8 478 500 956 88-110 <br /> CS(1060033-BS3) Prepared&Analyzed 06/12/01 <br /> ethyl tert-butyl ether 492 20 ug/l 500 984 70-130 <br /> a <br /> rrogate I 1-Diehloroethaned4 500 " 500 100 76-114 <br /> Surrogate Toluene-d8 513 Soo 103 88-110 <br /> Matrix Spike(1060033-MSI) Source- L106035-02 Prepared&Analyzed 06/07/01 <br /> Methyl tert-butyl ether 111 20 ug/I 500 56 110 60-140 <br /> Surrogate 1 1-Dichloroethaned4 492 500 984 76-114 <br /> Surrogate Toluene-d8 503 500 101 88-110 <br /> Matrix Spike Dtt (1060033-MSDI) Source: L10603542 Prepared&Analyzed 06/07/01 <br /> Methyl tert-butyl ether 112 20 ugd 500 56 112 60-140 0 897 25 <br /> Surrogate I 1-Dichloroeduined4 ill 500 101 76-114 <br /> Surrogate Toluene-a[8 514 500 105 88-110 <br /> Batch 1060034-EPA 5030B [P/T1 <br /> Blank(1060034-BLKI) Prepared&Analyzed 06/08/01 <br /> Ethanal ND 1000 u3/1 <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-Isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl tett-butyl ether ND 20 " <br /> Tert-amyi methyl ether ND 20 " <br /> Tert-butyl alcohol ND 1 W " <br /> Surrogate 1 2-Dichloroedmned4 458 500 916 76-114 <br /> 0-rrogate Toluene-d8 516 500 JOS 88-110 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 18 of 20 <br />