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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 45:) (916)921-9600 <br /> FAX <br /> VWOAnalytical www sequoialabscom <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 01/05/01 09 51 <br /> Total Purgeable Hydrocarbons (C6-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(5012388-04)Water Sampled 12/26/00 10 40 Received 12/28/00 08 05 <br /> Purgeable Hydrocarbons 559 500 ug/l l 1010043 01/04/01 01/04/01 DHS LUFT P-04 <br /> Benzene 156 0 500 " <br /> Toluene 4 18 0 500 " <br /> Ethylbenzene 10 3 0 500 " <br /> Xylenes(total) 16 8 0 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Trifluorotoluene 978% 60-140 <br /> NP-2-60(5012388-05)Water Sampled 12/26/00 10 50 Received 12/28/00 08 05 <br /> Purgeable Hydrocarbons 12700 5000 ug/f 100 1010043 01/04/01 01/04/01 DHS LUFr P-02 <br /> Benzene 3210 50 0 " <br /> Toluene 187 500 <br /> ylbenzene 334 500 i 1 <br /> enes(total) 521 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Trifluorotoluene 790% 60-140 <br /> NP-2-116(S012388-06)Water Sampled 12/26/00 10 30 Received 12/28/00 08 05 <br /> Purgeable Hydrocarbons 118 500 ug/l 1 1010043 01/04/01 01/04/01 DHS LUFT P-02 <br /> Benzene 15 2 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 2 50 " <br /> Surrogate a a a-Trifluorotoluene 860% 60-140 <br /> ecluoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Tits analytical report must be reproduced to its entirety <br /> Page 3 of 5 <br />