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1551 Industnal Road ' <br /> Sequoia San Carlos <br /> 650)23 9600 <br /> "'' ►��"'i Analytical - <br /> (650) <br /> FAX(650)232-9612 <br /> www scquoia]abs com <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court, Suite J Project Number Former Unocal#5098,Stockton Reported <br /> Dublin CA,94568- Project Manager Deanna Harding r 07/01/02 07 46 <br /> Tentatively Identified Compounds-by GUMS <br /> - Sequoia Analytical- San Carlos - _ <br /> - Reporting - - - - I <br /> Limit Analyte Result Lit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-4(L206021-05)Water Sampled 06/101021725 Received 06/11/02 18 05 <br /> Cyclohexane- _ _1130- 62 ugll 625- 2060034,- 06/24/02 06/24/02 EPA 8260E ' <br /> Cyclopentane 100 6 2 <br /> Cyclopentene 46 6 2 <br /> Dihydro-IH-Indene 60 62 " ^ <br /> Ethyl methyl benzene 37 6 2 ^ <br /> Methyl butane 120 6 2 <br /> Methyl cyclohexane 37 6 2 <br /> Methyl cyclopentane 230 62 ^ <br /> Trimethyl hexane 43 6 2 <br /> Unknown 62 62 ^ " <br /> MW-5(L206021-06)Water Sampled 06/10/02 14 02 Received 06/11/02 18 05 <br /> Propenyl benzene 11 10 ug/I _ 1 2060032 06/20/02 06/21/02 EPA 8260B <br /> MW-6(1.206021-07)Water Sampled 06/10/02 14 25 Received 06/11/02 1S 05 <br /> 2-Methyl butane 29 1 0 ug/l 1 2060032 06/20/02 06/21/02 EPA 8260B <br /> 2-Methyl pentane 20 1 0 " " " ^ <br /> Cyclohexane 5 5 I 0 " <br /> Dimethyl hexane 1S 1 0 <br /> Dimethvl pentane 6 4 1 0 <br /> Dimethyl pentane isomer 6 5 10 ^ <br /> Methyl cyclopentane - <br /> Propenyl benzene 7 0 1 0 <br /> - <br />- Trimethyl pentane isomer 9 7 1 0 " <br /> Sequoia Analytical - San Carlos The results to this report apply to the samples analyzed in accordance ivith the chain of <br /> custody document This analytical report must be reproduced in its enirrety <br /> Page 4 of 103 ' <br />