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1 Sequoia 1551 Indusinal Road <br /> San Carlos CA 94070 <br /> Analytical {650}232-9600 <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> ettler-Ryan/Geostrategies()) Project Unocal(4) <br /> Sierra Court, Suite J Project Number' Former Unocal#5098, Stockton Reported <br /> in CA,94568 Project Manager Deanna Harding 07/01/02 07 46 <br /> Tentatively Identified Compounds by GC/MS <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> -1 L206021-02 Water Sampled 06/10/02 15 30 Received 06/11/02 18-05 <br /> Cyclohexane 52 25 ugA 25 2060034 06/24/02 06/24/02 EPA 8260B <br /> ciopentane 80 2 5 <br /> rlopentene 35 2 5 „ <br /> yl cyclobutane 140 2 5 „ „ <br /> 11 <br /> Methyl pentane 24 2 5 <br /> tthyl pentane isomer 36 2 5 <br /> Lane 45 2 5 ^ ^ ^ ++ <br /> Pentene 31 2 5 <br /> penyl benzene 28 2 5 <br /> nown 160 2 5 <br /> NIW-2 L206021-03 Water Sampled 06/10/02 16 42 Received 06/11/02 IS 05 <br /> ane 250 18 ug/1 1786 2060034 06124/02 06/24/02 EPA 8260B <br /> lohexane 280 18 1. ^ „ +, „ <br /> Ethyl methyl benzene 600 18Efi <br /> yl methyl benzene isomer 360 18 <br /> butane 350 18 <br /> yclopentane 420 18 <br /> vlet y ethyl benzene 430 18 <br /> r9hyl ethyl benzene isomer 360 18 <br />' ene 240 18 " <br /> Iropenyl benzene 420 18 <br /> -3 L206021-04 Water Sampled 06/10/02 16 30 Received 06/11/02 18 05 <br /> ne 560 62 ug/1 62 S 2060034 06/24/02 06/24/02 EPA 8260B <br />'yclohexane 390 62 1, ^ ^ +, „ <br /> opentane 570 62 06/24/02 ^ <br /> opentene 620 62 06/24/02 <br /> imethyl cyclopropane 320 62 <br /> cyclobutane 750 62 <br /> ityl butane 1300 62 <br /> , 530 62 <br /> mtene 470 62 ^ „ <br /> r�enyl benzene 350 62 <br /> r <br /> quota Analytical-San Carlos The results in this report apply to the samples analyzed in accordance Nrith the chain of <br /> custody document This analytical report must be reproduced in its entirety, <br /> IPage 3 of 103 <br />