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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 4D (916)921-96W <br /> FAX <br /> awrAnalytical www secluoialabsCOM <br /> Gettler-Ryan-Dublin Project Unocal 0187, Stockton, CA <br /> 6747 Sierra Court Ste 1 Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager Paul LeCheminant 05/01/01 15 19 <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(5104327-04)Water Sampled 04124/0109 55 Received 04/24/01 11 00 <br /> Purgeable Hydrocarbons 439 250 ug/l 5 1040327 04/26/01 04/26/01 DHS LUFT P-02 <br /> Benzene 327 250 " <br /> Toluene 4 79 250 " <br /> Ethylbenzene 5 76 250 " <br /> Xylenes(total) 4 14 250 <br /> Methyl tert-butyl ether ND 12 5 " <br /> Surrogate a a a-Trifluorotoluene 957% 60-140 <br /> NP-2-60(5104327-05)Water Sampled 04/2410109 45 Received 04/24/01 11 00 <br /> Purgeable Hydrocarbons 7070 5000 ugll 100 1040327 04/26/01 04/26/01 DHS LUFT P-02 <br /> Benzene 2270 500 <br /> Toluene 164 500 " <br /> ylbenzene 157 500 <br /> " <br /> lenes(total) 267 500 <br /> Methyl tert-butyl ether 459 250 " <br /> Surrogate a a a-Trtfluorotoluene 93 7% 60-140 " <br /> NP-2-110(5104327-06)Water Sampled 04/24/0109 30 Received 04/24/01 11 00 <br /> Purgeable Hydrocarbons 81 1 500 ugll I 1040327 44/26/01 04/26/01 DHS LUFT P-02 <br /> Benzene 275 0 500 " <br /> Toluene 1 11 0 500 " <br /> Ethylbenzene 126 0 500 " <br /> Xylenes(total) 146 0 500 " <br /> Methyl tert-butyl ether 426 250 " <br /> Surrogate a a a-Trifluorotoluene 118% 60-140 <br /> equoia 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 rn its entirety <br /> Page 3 of 7 <br />