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Sequoia 8 1 Avenue Suite S <br /> Sacramento CA 95834 <br /> (9t6)921-96W <br /> FAX(916)921-0100 <br /> WO Analytical www sequoialabs com <br /> O — <br /> Gettler-Ryan-Dublin Project Unocal 0187,Stockton,CA <br /> 6747 Sierra Court,Ste J Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager P LeCheminant 03/02/01 17 05 <br /> Total Purgeable Hydrocarbons (C&C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-2-20(Sl02299-04)Water Sampled 02/21/01 15 05 Received 02/21/01 1.6 20 <br /> Purgeable Hydrocarbons 337 500 ug/1 1 1020283 02/26/01 02/26/01 DHS LUFT P-02 <br /> Benzene 3 21 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene 142 0 500 " <br /> Xylenes(total) 196 0 500 " <br /> Methyl tert-butyl ether ND 2 50 " <br /> Surrogate a a,a-Triuorotoluene 119% 60-140 " <br /> NP-2-60(S102299-05)Water Sampled 02/21/01 15 00 Received 02/21/01 16 20 <br /> Purgeable Hydrocarbons 8370 5000 ug/l 100 1020283 02/26/01 02/26/01 DHS LUFT P-02 <br /> Benzene 3370 500 " <br /> Toluene ND 500 " <br /> Wbylbcnzene(rota203 500lines(total) 328 500 <br /> thyl tert-butyl ether ND 250 <br /> Surrogate a a a-Tri luorotoluene 117% 60-140 " <br /> NP-1-116(Sl02299-06)Water Sampled 02/21/01 14 55 Received 02/21/01 16 20 <br /> Purgeable Hydrocarbons ND 500 ug/l 1 1030027 03/01/01 03/01/01 DHS LUFT <br /> Benzene 162 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tent-butyl ether ND 250 " <br /> Surrogate a a a-TriJluorololuene 118% 60-140 <br /> IWequota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 7 <br />