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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical www <br /> 921-0100 <br /> sequoequoialabs mm <br /> Gettler-Ryan-Dublin Protect Unocal 0187, Stockton,CA <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager P 'LeCheminant 02/02/01 17 42 <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 Limu Notes <br /> Batch 1020003- BPA 5030B(P/T) <br /> Blank(1020003-BLK1) Prepared&Analyzed 01/31/01 <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 250 <br /> Surrogate a a a-Triuorotoluene 917 100 91 7 60-140 <br /> LCS(1020003-BS1) Prepared&Analyzed 01/31/01 <br /> Benzene 8 74 0 500 ug/[ 100 874 70-130 <br /> *ene 904 0 500 „ 100 904 70-130 <br /> [benzene 8 94 0 500 100 89 4 70-130 <br /> Xylenes(total) 269 0 500 300 89 7 70-130 <br /> Methyl tent-butyl ether 904 2 50 100 904 70-130 <br /> Surrogate a a a-Triuorotoluene 966 100 966 60-140 <br /> Matrix Spike(1020003-MSI) _ Source S101428-16 Prepared&Analyzed 01/31/01 <br /> Benzene 12 2 0 500 ug/l EO 0 3 15 905 60-140 <br /> Toluene 952 0 500 100 ND 95 2 60-140 <br /> Ethylbenzene 8 78 0 500 100 ND 878 60-140 <br /> Xylenes(total) 25 5 0 500 300 1 13 81 2 60-140 <br /> Methyl tert-butyl ether 269 250 100 18 8 81 0 60-140 <br /> Surrogate a a a-Trifluoratoluene 118 100 118 60-140 <br /> Matrix Spike Dup(1020003-MSD1) Source 5101428-16 Prepared&Analyzed 01/31/01 _ <br /> Benzene 11 8 0 500 ug/l 100 3 15 865 60-140 3 33 25 <br /> Toluene 904 0 500 100 ND 904 60-140 5 17 25 <br /> Ethylbenzene 866 0 500 100 ND 866 60-140 138 25 <br /> Xylenes(total) 25 4 0 500 300 1 13 809 60-140 0 393 25 <br /> Methyl tent-butyl ether 256 250 10 0 188 68 0 60-140 495 25 <br /> Surrogate a a a-Trrfluorotoluene 102 100 102 60-140 <br /> i <br /> 4equota Analytical- Sacramento The results rn 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 7 of 8 <br />