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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> ,!1) (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> ttler-Ryan-Rancho Cordova Prof-t Unocal 0187,Stockton,CA <br /> 140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 03/04/02 16 09 <br /> Total Purgeable Hydrocarbon, 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 2020335-EPA 5030E PIT <br /> Blank(2020335-BLKI) Prepared&Analyzed 02/26/02 <br /> Purgeable Hydrocarbons ND 050 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Methyl tert-butyl ether ND 00050 " <br /> Surrogate a a a-Trifluorotoluene 00173 00200 865 60-140 <br /> LCS(2020335-BSI) Prepared&Analyzed 02/26/02 <br /> Benzene 00171 00050 mg/kg 00200 85 5 70-130 <br /> Toluene 0 0172 00050 00200 860 70-130 <br /> Ethylbenzene 0 0194 00050 00200 97 0 70-130 <br /> Wines(total) 00556 00050 00600 92 7 70-130 <br /> yl tent-butyl ether 0 0158 00050 00200 790 70-130 <br /> Surrogate a,a,a-Trifluorotoluene 00165 00200 823 60-140 <br /> Matrix Spike(2020335-MSI) Source S202216-01 Prepared&Analyzed 02/26/02 <br /> Benzene 00157 00050 mg/kg 00200 ND 78 5 60-140 <br /> Toluene 00162 00050 00200 ND 81 0 60-140 <br /> Ethylbenzene 0 0179 00050 00200 ND 89 5 60-140 <br /> Xylenes(total) 00517 00050 00600 ND 86 2 60-140 <br /> Methyl tert-butyl ether 00146 00050 00200 ND 73 0 60-140 <br /> Surrogate a,a,a-Trifluorotoluene 00159 " 00200 79 5 60-140 <br /> Matrix Spike Dup(2020335-MSD1) Source 5202216-01 Prepared&Analyzed 02/26/02 <br /> Benzene 0 0152 00050 mg/kg 0 0200 ND 760 60-140 324 25 <br /> Toluene 00155 00050 00200 ND 77 5 60-140 442 25 <br /> Ethylbenzene 00171 00050 00200 ND 85 5 60-140 457 25 <br /> Xylenes(total) 00495 00050 " 00600 ND 82 5 60-140 435 25 <br /> Methyl tert-butyl ether 00146 00050 00200 ND 73 0 60-140 000 25 <br /> Surrogate a a,a-Trifluorotoluene 00149 00200 74 5 60-140 <br /> uoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 6 of 9 <br />