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$19 5tAvenue,Suite 8 <br /> Sequoia Sacramento, <br /> ento,CA 95834 <br /> (916)921-9600 <br /> �� Analytical FAX(916)921-0100 <br /> www sequoialabs coin <br /> • URS-Sac Gateway Oaks Project ARCO 2093,Tracy,CA <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number 2093,Tracy,CA Reported <br /> Sacramento CA,95833 Project Manager Vernon Elarth 07/16/02 17 03 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT- Quahty 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 2070089-EPA 5030B P <br /> Blank 2070089-BLKI Pirpared&Analyzed 07/09/02 <br /> Purgeable Hydrocarbons ND 50 UFA <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Triuorotoluene 856 100 86 60-140 <br /> LCS(2070089-BSI) Prepared&Analyzed 07/09/02 <br /> Benzene 828 050 ugll 100 83 70-130 <br /> Toluene 893 0 50 100 89 70-130 <br /> Ethylbenzene 967 0 50 10 0 87 70-130 <br /> Xylenes(total) 27 1 0 50 30 0 90 70-130 <br /> Surrogate a a a-Trfluorotoluene $85 10 0 88 60-140 <br /> �Vlatrtx S tke 2070089-MS1 Source 5207012-01 Pr ared&Anal zed 07/09/02 <br /> Benzene 7 82 0 50 ug/l 10 0 ND 78 60-140 <br /> Toluene 8 56 050 " 100 ND 86 60-140 <br /> Ethylbenzene 840 0 50 100 ND 84 60-140 <br /> Xylenes(total) 260 0 50 " 30 0 ND 87 60-140 <br /> Surrogate a a a-Trifluorotoluene 856 100 86 60-140 <br /> Matrix Spike Dup_(2070089-MSD1) Source 5207012-01 Prepared&Analyzed 07/09/02 <br /> Benzene 842 050 ug/I 100 ND 84 60-140 7 25 <br /> Toluene 9 20 0 50 100 ND 92 60-140 7 25 <br /> Ethylbenzene 9 06 0 50 10 0 ND 91 60-140 8 25 <br /> Xylenes(total) 274 050 300 ND 91 60-140 5 25 <br /> Surrogate a a a-Trifluorololuene 848 100 85 60-140 <br /> Sequoia 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 1 l <br />