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Sequoia 819 acro Avenue Suite$ <br /> Sacramento CA 95$34 <br /> (916)921-9600 <br /> Analytical FAX equo alabs92 1 c 00 <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project Unocal 0187 Stockton CA <br /> 6747 Sierra Court, Ste J Project Number Miner St Reported <br /> Dublin CA 94568 Project Manager P LeCheminant 01/09/01 16 14 <br /> Total Purgeable Hydrocarbons (C&C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPI] <br /> Analyte Result Lima units Level Result %REC Limits RPD Limit Notes <br /> Batch 1010073- EPA 5030B(PIT) <br /> Blank(1010073-BLK1) Prepared&Analyzed 01/08/01 <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 tett-butyl ether ND 250 <br /> Surrogate a a a-Triuoratoluene 109 100 109 60-140 <br /> LCS(1010073-BSI) Prepared&Analyzed 01/08/01 <br /> Benzene 10 6 0 500 ug/I 100 106 70-130 <br /> ene 110 0 500 100 Ito 70-130 <br /> [benzene 1 1 4 0 500 100 114 70-130 <br /> Xylenes(total) 30 1 0 500 300 100 70-130 <br /> Methyl tert-butyl ether 11 1 250 10 0 111 70-130 <br /> Surrogate a a a-Triuorotoluene 112 100 112 60-140 <br /> Matrix Spike(1010073-MSI) Source S012392-07 Prepared&Analyzed 01/08/01 <br /> Benzene 100 0 500 ug/I 100 ND 100 60-140 <br /> Toluene 10 6 0 500 10 0 ND 106 60-140 <br /> Ethylbenzene 1 1 0 0 500 100 ND 110 60-140 <br /> Xylenes(total) 290 0 500 300 ND 967 60-140 <br /> Methyl cert-butyl ether 110 250 100 ND Ito 60-140 <br /> Surrogate a a a-Trifluorotoluene 110 100 110 60-140 <br /> Matrix Spike Dup(1010073-MSD1) Source S012392-07 Prepared&Analyzed 01/08/01 <br /> Benzene 103 0 500 ug/I 10 0 ND 103 60-140 296 25 <br /> Toluene 109 0 500 100 ND 109 60-140 279 25 <br /> Ethylbenzene 112 0 500 100 ND 112 60-140 1 80 25 <br /> Xylenes(total) 294 0 500 300 ND 980 60-140 l 37 25 <br /> Methyl tent-butyl ether 105 250 10 0 ND 105 60-140 4 65 25 <br /> Surrogate a a a-Tr�fluorotoluene 1I 1 100 111 60-140 <br /> —Requoia Analytical- Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 6 <br />