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Tial Road <br /> ` Sequoia Sant lndustA94070 <br /> San Carlos 23 94070 <br /> Analytical - (6x0)2329600 <br /> FAX(650)232 9612 <br /> ` wwwuo�ala <br /> xq bs com <br /> Gettier-Ryan/G eostrategtes(1) Project Unoca)(4) <br /> 6747 Sierra Court Suite 1 Project Number Unocal SS#5098, Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 01/01/02 11 05 <br /> - - Volatile Organic Oxygenated Compounds by EPA Method 8260B - Quality Control-- - <br />- Sequoia Analytical - San-Carlos - - <br /> Reporting Spike Source %REC RPD <br /> Analvte Result Limit Unit, Level Result %REC Limits RPD Limn Notee <br /> Batch 1120006-EPA 50309 IP/Tl <br /> LCS{1120006-BS1}T-----� - --- - -- --�� ---Prepared&Analyzed 12/04/01 ---' — - ------ ---- - <br /> Benzene 469 10 ug/l 500 93 8 70-130 <br /> 'toluene 497 1 0 Soo 994 70-130 <br /> Methyl ten-burvi ether 52 1 10 500 104 70-130 <br /> Surrogate 12-Dichloroeihone-d4 228 250 912 70-130 <br /> Surrogate Toluene-d8 245 25 0 98 0 70-130 <br /> Surrogate 4-BFB 233 25 0 932 70-130 <br /> LCS(1120006-BS2) Prepared& Analyzed 12/06/01 <br /> Benzene 537 10 ugli Soo 107 70-130 <br /> Toluene 499 1.0 500 99 8 70-130 <br /> Methvi ten-butyl ether 548 10 500 110 70-130 <br /> Surrogate 1 1-Dichloroerhane-d4 261 250 104 70-130 <br /> Surrogate Toluene-d8 243 - _ 250 98 0 70-130 <br /> Surrogate 4-BFB 232 25 0 928 70-130 • <br /> Matrix Spike(1120006-MSI) Source Ll 11162-08 Prepared&Analyzed 12/04/01 <br /> Benzene 484 1 0 ug/l 500 ND 96 8 60-140 <br /> Toluene 482 1 0 500 ND 964 60-140 <br /> Methyl ten-butyl ether-=-=---- ----46 7 — ) 0=="--- 50 0--ND—T93 4---60-140- --- -- - -- <br /> Surrogate 12-Dichloroerhane-d4 248 250 99 2 70-130 <br /> Surrogate Toluene-d8-- - -- -- - 243 <br /> - -- -- " -- 25 0` -97 2—70430---_-_______ <br /> Surrogate 4-BFB 242 250 968 70-130 <br /> Matrix Spike Dap(I 12000(F-MSDI) Source L111162-08 Prepared&Analyzed 12/04/01 <br /> Benzene 493 10 ug/l 500 ND 98 6 60-140 184 25 <br /> Toluene 492 10 Soo ND 984 60-140 205 25 <br /> Methyl Leri-butyl ether 537 10 500 ND 107 60-140 13 9 25 <br /> Surrogate 1,2-Dichloroerhane-d4 26 4 250 106 70-130 <br /> Surrogate Toluene-d8 24 7 25 0 988 70-130 <br /> Surrogate 4-BFB 249 25 0 996 70-130 <br /> Sequoia Analytical -San Carlos The results in this report apply to She samples anal)Aed in accordance with the chain o <br /> 0 <br /> custody document This analytical report must be reproduced in its entire!) <br /> Page 30 of 34 <br />