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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> 4 ID <br /> (916)921-9600 <br /> Analytical www <br /> (916)9Z1-0{00 <br /> Owsequoialabs 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 P LeCheminant 02/07/01 14 38 <br /> Total Purgeable Hydrocarbons (C6-02), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Anaiyte Result Limit Units Dilution Batch Prepared Analyzed Method Motes <br /> NP-1-22 (5101452-01)Water Sampled 01/30/01 09 15 Received 01/30/01 14 10 <br /> Purgeable Hydrocarbons 5070 5000 ug/l 100 1020046 02/05/01 02/05/01 DHS LUFT P 02 <br /> Benzene 110 500 " <br /> Toluene ND 500 " <br /> Ethylbenzene 586 500 " <br /> Xylenes(total) 202 500 " <br /> Methyl tert-butyl ether ND 250 <br /> Surrogate a a a-Trtfluorotoluene 92 9% 60-140 <br /> NP-1-65(S101452-02)Water Sampled 01/30/0109 25 Received 01/30/01 14 10 <br /> Purgeable Hydrocarbons 756 500 ugll 10 1020046 02/05/01 02/05/01 DHS LUFT P-02 <br /> Benzene 160 500 " <br /> Toluene 100 500 " <br /> (benzene 17 2 500 <br /> enes(total) 126 500 " <br /> Methyl tert-butyl ether ND 25 0 " <br /> Surrogate a a a-Trtfluorotoluene 79 5% 60-140 " <br /> NP-1-1I1 (S101452-03)Water Sampled 01/30/01 09 40 Received 01/30/01 I4 10 <br /> Purgeable Hydrocarbons ND 500 ug/I 1 1020046 02/05/01 02/05/01 DHS LUFT <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Trtfluorotoluene 778% 60-140 " <br /> equota 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 to its entirety <br /> page 2 of 7 <br />