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Sequoia 819 Sacramento <br /> Avenue Suite 8 <br /> Sacramento CA 95834 <br /> 4 (916)921-9600 <br /> FAX(916)921-0100 <br /> a- F„ Analytical www sequoialabs com <br /> Ciettler-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 03/14/01 15 29 <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 1030041 - EPA 5030E(PIT) <br /> Blank(1030041-BLK1) Prepared&Analyzed 03/09/01 <br /> Purgeable Hydrocarbons ND 500 ugll <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-Trifluorowluene 8 70 100 870 60-140 <br /> LCS(1030041-BSI) Prepared&Analyzed 03/09/01 <br /> Benzene 9 64 0 500 ugll 100 964 70-130 <br /> ft <br /> ene 991 0 500 „ too 991 70-130 <br /> lbenzene 101 0 500 100 101 70-130 <br /> Xylenes(total) 299 0 500 300 997 70-130 <br /> Methyl tert-butyl ether 957 250 100 957 70-130 <br /> Surrogate a a a-Trifluorotoluene 915 100 915 60-140 <br /> Matrix Spike(1030041-MSI) _ Source S103120-12 - Prepared&Analyzed 03/09/01 _ <br /> Benzene 942 0 500 ug/l t0 0 ND 942 60-140 <br /> Toluene 968 0 500 100 ND 968 60-140 <br /> Ethylbenzene 100 0 500 100 ND 100 60-140 <br /> Xylenes(total) 307 0 500 300 ND 102 60-140 <br /> Methyl tent-butyl ether 968 250 100 ND 968 60-140 <br /> Surrogate a a a-Trifluorotoluene 711 100 711 60-140 <br /> Matrix Spike Dup(1030041-MSD1) Source S103120-12 Prepared&Analyzed 03/09/01 <br /> Benzene 968 0 500 ugll 10 0 ND 968 60-140 2 72 25 <br /> Toluene 996 0 500 10 0 ND 996 60-140 285 25 <br /> Ethylbenzene 10 2 0 500 100 ND 102 60-140 1 98 25 <br /> Xylenes(total) 302 0 500 300 ND 101 60-140 1 64 25 <br /> Methyl tent-butyl ether 939 250 100 ND 939 60-140 3 04 25 <br /> Surrogate a a a-Trifluorotoluene 686 100 686 60-140 <br /> ecluciia Analytical- Sacramento The results to 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 4 of 6 <br />