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i <br /> Sequoia 819 Striker Avenue S 8 <br /> ► Sacramento CA 95858 34 <br /> (916)921-9600 <br /> FAX 00 <br /> Analytical www sequoialabs corn <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 (C&C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units DllUtlon Batch Prepared Analyzed Method Notes <br /> NP-1-22 (S106302-01)Water Sampled 06/19/01 09 20 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons 6100 2000 ug/I 40 1060183 06/20/01 06/20/01 DHS LUFT zP-02 <br /> Benzene 89 20 " <br /> Toluene ND 20 " <br /> Ethylbenzene 250 20 <br /> Xylenes(total) 760 20 " <br /> Methyl tert-butyl ether ND 100 " <br /> Surrogate a a a-Trifluorotoluene 969% 60-140 " <br /> NP-1-65(5106302-02)Water Sampled 06/19/01 09 10 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons 760 500 ug/I 10 1060183 06/20/01 06/20/01 DHS LUFT zP-02 <br /> Benzene 34 50 " <br /> Toluene 160 5 0 " <br /> ylbenzene 19 5 0 <br /> eves(total) 77 5 0 <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 105% 60-140 " <br /> NP-1-111(5106302-03)Water Sampled 06/19/0108 55 Received 06/19/01 12 02 <br /> Purgeable Hydrocarbons ND 50 ug/I 1 1060183 06/20/01 06/20/01 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbcnzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 958% 60-140 " <br /> Am <br /> 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 2 of 6 <br />