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]551 I ndustnai Road <br /> D <br /> Sequoia San Carlos CA 94070 <br /> (650)232 9600 <br /> Ana1y iCal FAX(650)2329612 <br /> qQF1` l l www sequoialabs eom <br /> -Ry an/Geoslralegies(1) Project Unocal(4) <br /> 16*7Sierra Court Suite J Project Number Former Unocal SS42859 Stockton,CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 09/06/01 12 14 <br /> Tota! Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analvte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> TB-LB(L108120-01)Water- Sampled 08/16/01 00 00 Received 08/17/01 18 55 <br /> Purgeable Hydrocarbons ND 50 ug/I 1 i H28004 08/28/01 08/28/01 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a,a,a-Tiifluoioioluene 913 % 70-130 " <br /> 1•9N'V-1 (L108120-02) 'Vater Sampled 08/16/01 17 45 Received 08/17/01 18 55 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 1H28004 08/28/01 OW8141 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Meth I ten-butyl ether ND 2 5 " <br /> S to a a a-Tr fluorotoluene 88 6% 70-130 " <br /> N1\ili-2 (L108120-03)'%V:iter Sampled 08/17/01 09 30 Received 08/17/01 18 55 <br /> Purgeable 1113drocarbons 98000 25000 ug/l 500 1H29003 08/29/01 08/29/01 DHS LUFT P-Ol <br /> Benzene 5000 250 " <br /> Toluene 22000 250 " <br /> Ethylbenzene 5800 250 " <br /> Xylenes(total) 20000 250 " <br /> Methyl tent-butyl ether ND 1200 " <br /> Surrogate a a a-Triuorotoluene 106% 70-130 " <br /> SeIW Analytical - San Carlos 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 5 of 22 <br />