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Sequoia 814 Striker Avenue Suite 8 <br /> Sacramento CA 45834 <br /> 4 <br /> (916)92 t-9600 <br /> Analytical FAx(416)921 0100 <br /> www sequotI:IN <br /> alabs com <br /> 01WO <br /> Gettler-Ryan-Dublin Project Unocal 0187, Stockton,CA <br /> 6747 Sierra Court,Ste I Protect Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager P L.eCherrunant 02/13/01 11 52 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - 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 1020090-EPA 5030E (PIT <br /> Blank(1020090-BLKI) Prepared&Analyzed 02/09/01 <br /> Purgeable Hydrocarbons ND 500 ug/1 <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-Trifluororoluene 888 100 888 60-140 <br /> LCS(1020090-BSI) Prepared&Analyzed 02/09/01 <br /> Benzene 8 37 0 500 ug/I 100 837 70-130 <br /> uene 864 0 500 100 86 4 70-130 <br /> ylbenzene 877 0 500 100 87 7 70-130 <br /> Xylenes(total) 263 0 500 300 877 70-130 <br /> Methyl tert-butyl ether 720 250 100 72 0 70-130 <br /> Surrogate aaa-Trifluorotoluene 897 100 897 60-140 <br /> Matrix Spike(1020090-MS1) _ Source 5102102-02 Prepared&Analyzed 02/09/01 <br /> Benzene 821 0 500 ug/l 10 0 ND 82 l 60-140 <br /> Toluene 8 50 0 500 100 ND 850 60-140 <br /> Ethylbenzene 957 0 500 100 ND 85 7 60-140 <br /> Xylenes(total) 25 7 0 500 300 ND 85 7 60-140 <br /> Methyl tert-butyl ether 6 02 2 50 100 ND 602 60-140 <br /> Surrogate a a a-Trifluorotoluene 859 100 859 60-140 <br /> Matrix Spike Dup(1020090-MSDI) Source 5102102-02 Prepared&Analyzed 02/09/01 <br /> Benzene 829 0 500 ug/l 100 ND 829 60-140 0 970 25 <br /> Toluene 858 0 500 100 ND 858 60-140 0 937 25 <br /> Ethylbenzene 864 0 500 too ND 864 60-140 0 813 25 <br /> Xylenes(total) 25 9 0 500 300 ND 86 3 60-140 0 775 25 <br /> Methyl tert-butyl ether 7 47 250 100 ND 74 7 60-140 21 5 25 <br /> Surrogate a a a-Trifluorotoluene 857 100 85 7 60-140 <br /> I <br /> I <br /> equora 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 /> I <br /> I <br /> Page 5 of 6 <br />