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� rn <br /> A 94070 <br /> ��++ 1551 Indu9nal Road <br /> a- ) Sequoia SanC(650)ados 32-%Do <br /> q (aso}232-goo° <br /> Analytical FAX(650)232-96 12 <br /> ,w,N,N sequmalabs cone <br /> Gettle.r-Ryan/Geostrategles(1) Project Tosco(1) <br /> 6747 Sierra Court,Suite] Project Number Former Unocal SS#4409,Stockton,CA Reported- <br /> Dublin CA,94568 Project Manager Deanna Harding 10126/0109:39: <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spice Source %REC RPD <br /> Analyte Result Lunit Units Level Result %REC Limits RPD Lunit Notes <br /> _Batch 1100063-EPA 5030D (PITT _ <br /> Blank(1100063-BLK2) Prepared&Analyzed 10/16/01 <br /> Ethanol ND 1000 ug/l <br /> 1,24Dibrvmoethane ND 20 " <br /> 1,2-D chloroedum ND 20 " <br /> Ek.isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND 20 " <br /> Methyl tent-butyl ether ND 20 " <br /> Ten-arnyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroerhane-4 501 500 100 76-114 <br /> Surrogate Toluene-& 487 500 974 88-110 <br /> LCS(1100063-BSI) Prepared&Analyzed 10/15/01 <br /> Methyl Cert-butyl ether 584 20 ug/l 500 117 70-130 <br /> Surrogate 1,2-Dichloroethane-4 562 500 111 76-114 <br /> Surrogate Toluene-d8 505 500 101 88-110 <br /> LCS(1100063-BS2) Prepared&Analyzed 10/16/01 _ <br /> Methyl tent-butyl ether 53 7 20 ugA 500 107 70-130 <br /> Surrogale 1,2Dichloroethane-4 536 500 107 76-114 <br /> Surrogate Toluene-$ 485 500 970 88-110 <br /> Matrix Spike(1100063-MSI) Source L110077-03 Prepared&Analyzed 10/15/01 _ <br /> Medo tent-butyl ether 527 20 ugll 500 ND 105 60-140 <br /> Sw7ogate 1,2-Dichloroeiharte44 488 500 976 76-114 <br /> Swrogate Toluene-d8 524 500 103 88-110 <br /> Matrix Spike Dap(1100063-MSDI) Source:L110077-03 Prepared&Analyzed 10/15/01 - <br /> Methyl tert-butyl ether 544 20 ug/l Soo ND 109 60-140 374 25 <br /> Surrogate 1,2 Dichloroedume-d4 512 50 0 101 76-114 <br /> Swrogale Toluene-d8 517 500 103 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 anabmcal report must be reproduced in tis entirety <br /> Page 15 of 16 <br />