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404 N Wiget Lane <br /> • Walnut Creek CA 94598 <br /> S e qu of a (925)988-9600 <br /> FAX(925)988-9673 <br /> �DAnalytical www sequolalabs corn <br /> ttler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0123 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 20-Jul-00 11 19 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Lunn Units Dilution Batch Prepared Analyzed Method Nates <br /> U-3(WO06495-04)Water Sampled 19-0un-00 10 50 Received 20-0un-00 17 30 <br /> Purgeable Hydrocarbons ND 50 ug/1 1 OF28001 28-jun-00 28-Jun-00 EPA <br /> 8015M/8020 <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 <br /> Surrogate a,a,a-Tnfluorotoluene 953 % 70-130 " <br /> U4 (W006495-05)Water Sampled 19-Jun-00 13 40 Received 20-Jun-00 17 30 P-01 <br /> Purgeable Hydrocarbons 210 50 ug/1 1 OF29M 29-Jun-00 29-Jun-00 EPA <br /> 8015M/8020 <br /> Benzene 9 5 0 50 " <br /> Toluene 0 63 0 50 " <br /> Ethylbenzene 0 89 0 50 " <br /> lenes(total) 2 4 0 50 <br /> IWthyl tert-butyl ether ND 2 5 <br /> Surrogate a,a,a-Tnfluorotoluene 863% 70-130 " <br /> U-5 (W006495-06)Water Sampled 19-0un-00 1122 Received 20-Jun-0017 30 <br /> Purgeable Hydrocarbons ND 50 ug/1 1 OF28001 28-Jun-00 28-Jun-00 EPA <br /> 8015M/8020 <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 <br /> Surrogate a,a,a-Trtfluorotoluene 950% 70-130 " <br /> Sequoia Analytical-Walnut Creek The results in tits report apply to the samples analyzed to accordance with the chain of <br /> custody document Vus analytical report must be reproduced in its entirely <br /> Page 3 of 20 <br />