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r 404 N Wiget Lane Sequoia Walnut Geek CA 94598 (925)988-96pp FAX(925)988-%73 Analytical a- www sequoialabs com , Gettler Ryan,Inc -Dublin Project it Unocal, 6747 Sierra Court Suite J Project Number 'Unocal#0187 Reported Dublin CA,94568 Project Manager Deanna L Harding 14-Mar-01 10 19 Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015NV8020M Sequoia Analytical -Petaluma Reporting Analyte Result Lunt Umts Dilution Batch Prepared Analyzed Method Notes „ U-3 (W102669-04)Water Sampled 27-Feb-01-15 51-I'Received 28-Feb-01 16 50- Gasabne 279 500 uO 1 1030227 09-Mar-01 09-Mar-01 EPA 8015M/8020M Benzene 0 750 0 500 QR-04 Toluene 0 657 0 500 QR-04 Ethylbenzene ND 0 500 " Xylenes(total) 793 0 500 " Methyl tent-butyl ether ND 2 50 Surrogate a,a,a-Thfluorotoluene 957% 65-135 Surrogate 4 Bromofluorobenzene 997% 65-135 " U4 (W102669-05)Water Sampled 26-Feb-01 12 00 Received 28-Feb-01 16 50 Gasoline ND 500 ug/1 1 1030227 09-Mar-Ol 09-Mar-01 EPA 8015M/8020M Benzene ND 0 500 Toluene y ND y J 0 500 -Ethylbenzene- - --- --ND - --0 500- Xylenes(total) ND 0 500 Methyl text-butyl ether ND 250 " Surrogate a,a,a-Trrfluorotoluene 997% 65-135 " Surrogate 4 Brontafluorobenzene-.—_- -,�-- _ —99 7%--_� .65-135 r_ U-5 (W102669-06)Water Sampled 26-Feb-01 11 25 Received 28-Feb-01 16 50 ^�Gasoline ND 500 ug/l 1 1030227 09-Ma'-01 09-Mar-Ol EPA 8015M/8020M , Benzene - ND }'07500 Toluene ND 0 500 " Ethylbenzene ND 0 500 " Xylenes(total) ND 0 500 Methyl tert-butyl ether ND 2 50 " Surrogate a,a,a-Trifluorotoluene 980% 65-135 " Surrogate 4 Bromofluorobenzene 970% 65-135 " Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain custody document TMs analytical report must be reproduced to its enbre Page 15 of 32