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Sequoia 819 Avenue SuiteSacraacra mento CA 958344 <br /> (916)921-9600 <br /> Analytical www `916'92,-0100 <br /> sequocalabs coin <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 03/07/01 17 05 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFr - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1020283-EPA 5030B P/T <br /> Blank(1020283-BLK1) Prepared&Analyzed 02/26/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <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 2 50 " <br /> Surrogate a a a-Trifluorotoluene 115 100 115 60-140 <br /> LCS(1020283-BSI) Prepared&Analyzed 02/26/01 <br /> Benzene 940 0 500 ug/i 100 940 70-130 <br /> Dene 994 0 500 100 994 70-130 <br /> Ibenzene 10 2 0 500 10 0 102 70-130 <br /> Xylenes(total) 31 4 0 500 300 105 70-130 <br /> Methyl ten-butyl ether 880 2 50 100 880 70-130 <br /> Surrogate a a a-Trifluorotoluene 12 1 100 121 60-140 <br /> Matrix Spike(1020283-MS1) Source 5102299-04 Prepared&Analyzed 02/26/01 <br /> Benzene 879 0 500 ug/i too 3 21 558 60-140 Q-02 <br /> Toluene 932 0 500 100 ND 932 60-140 <br /> Ethylbenzene 974 0 500 100 1 42 832 60-140 <br /> Xylenes(total) 299 0 500 300 1 96 93 1 60-140 <br /> Methyl cert-butyi ether 707 250 100 ND 767 60-140 <br /> Surrogate a a a-Tri luorotoluene 113 100 113 60-140 <br /> Matrix Spike Dup(1020283-MSDI) Source S102299-04_ Prepared&Analyzed 02/26/01 <br /> Benzene 887 0 500 ug/l. 100 321 566 60-140 0 906 25 Q-02 <br /> Toluene 948 0 500 100 ND 948 60-140 1 70 25 <br /> Ethylbenzene 992 0 500 100 1 42 85 0 60-140 1 83 25 <br /> Xylenes(total) 305 0 500 300 196 95 1 60-140 199 25 <br /> Methyl tert-butyl ether 791 250 too ND 79 1 60-140 308 25 <br /> Surrogate a a a-Trrfluorololuene 114 100 114 60-140 <br /> llWequoia 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 5 of 7 <br />