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819 Striker Avenue Suite 8 <br /> ento 583" <br /> 4D Sequoia (916)92199600 <br /> FAX(916)921-0 100 <br /> *%U—r Analytical www sequoialabs com <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 Paul LeCheminant 06/25/01 14 29 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units DdUuOn Batch Prepared Analyzed Method Notes <br /> NP-2-20(5106302-04)Water Sampled 06/19/01 10 00 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons 64 50 ug/l 1 1060183 06/20/01 06/20/01 DHS LUFT zP-02 <br /> Benzene 13 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 859% 60-140 IF " <br /> NP-2-60(S106302-05)Water Sampled 06/19/0109 50 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons ND 5000 ug/l 100 1060191 06/19/01 06/20/01 DHS LUFT <br /> Benzene 2300 50 " <br /> Toluene 190 50 " <br /> �ylbenzene 130 50 <br /> enes(total) 210 50 " <br /> Methyl Cert-butyl ether ND 250 <br /> Surrogate a a a-Trifluorotoluene 119% 60-140 " <br /> NP-2-116(5106302-06)Water Sampled 06/19/0109 40 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 1060191 06/19/01 06/20/01 DHS LUFT <br /> Benzene 23 050 " <br /> Toluene 13 050 <br /> Ethylbenzene 10 050 " <br /> Xylenes(total) 13 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 109% 60-140 " <br /> OC quota 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 6 <br />