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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 4x) <br /> (916)921-9600 <br /> AOWnalytical FAX(916) 00 <br /> www sequoialabs alabs com <br /> Gettler-Ryan-Dublin Project Unocal 0187, Stockton CA <br /> 6747 Sierra Court Ste j Project Number N/A Reported <br /> Dublin CA 94568 Project Manager P LeChemtnant 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 Limit Notes <br /> Batch 1010280- EPA 5030B(P/T) <br /> Blank(1010280-BLKI) Prepared&Analyzed 01/26/01 <br /> Purgeable Hydrocarbons ND 500 ug/i <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 " <br /> Methyl tent-butyl ether ND 250 <br /> Surrogate a a a-Triuorotoluene 932 100 93 2 60-140 <br /> LCS(1010280-BSI) Prepared&Analyzed 01/26/01 <br /> Benzene 906 0 500 ug/I 100 906 70-130 <br /> fn" <br /> 901 0 500 100 901 70-130 <br /> (benzene 880 0 500 100 88 0 70-130 <br /> Xylenes(total) 272 0 500 300 907 70-130 <br /> Methyl Cert-butyl ether 935 2 50 10 0 935 70-130 <br /> Surrogate a a a-Trifluorotoluene 899 100 89 9 60-140 <br /> Matrix Spike(1010280-MS1) Source 5101340-04 Prepared&Analyzed 01/26/01 <br /> Benzene 11 4 0 500 ug/l 10 0 165 97 5 60-140 <br /> Toluene 100 0 500 l0 0 ND 100 60-140 <br /> Ethylbenzene 12 8 0 500 l0 0 3 11 969 60-140 <br /> Xylenes(total) 38 7 0 500 300 752 104 60-140 <br /> Methyl ten-butyl ether 158 250 100 ND 158 60-140 Q-16 <br /> Surrogate a a a-Triuorotoluene 103 100 103 60-140 <br /> Matrix Spike Dup(1010280-MSD1) Source S101340-04 Prepared&Analyzed 01/26/01 <br /> Benzene 1 1 6 0 500 ug/l t 0 0 165 995 60-140 1 74 25 <br /> Toluene 101 0 500 100 ND 101 60-140 0 995 25 <br /> Ethylbenzene 125 0 500 100 3 11 93 9 60-140 237 25 <br /> Xylenes(total) 393 0 500 300 752 106 60-140 1 54 25 <br /> Methyl ten-butyl ether 16 0 2 50 10 0 ND 160 60-140 1 26 25 Q-16 <br /> Surrogate a a a-Tris luorotoluene 104 100 104 60-140 <br /> Oeq-uota 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 he reproduced in its entirely <br /> Page 6 of 8 <br />