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Sequoia <br /> 819 Striker Avenue Sune 8 <br /> Se uoia Sacramento )9 95834 <br /> [^^_'ti-_ �� � (916)921 9600 <br /> Analytical FAX(916) lab 0100 <br /> www sequoiaEa6s com <br /> ECOR International-Rancho Cordova Project ARCO 595,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/02 14 12 <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 2070242-EPA 5030B PIT <br /> Blank(2070242-BLKI) Prepared&Analyzed 07/24/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Tris luorotoluene 105 100 105 60-140 <br /> LCS(2070242-BSI) Prepared&Analyzed 07/24/02 <br /> Benzene 100 050 ug/l 100 100 70-130 <br /> Toluene 106 050 100 106 70-130 <br /> Ethylbenzene 105 050 100 105 70-130 <br /> Xylenes(total) 322 050 300 107 70-130 <br /> �thyl tert-butyl ether 993 25 100 99 70-130 <br /> -Nr rrogate a a a-Trifluorotoluene 110 100 110 60-140 <br /> Matrix Spike(2070242_-MSI) Source S207249-14 Prepared&Analyzed 07/24/02 <br /> Benzene 102 050 ugl] 100 ND 102 60-140 <br /> Toluene 107 050 100 ND 107 60-140 <br /> Ethylbenzene 104 050 10 0 ND 104 60-140 <br /> Xylenes(total) 31 3 050 300 ND 104 60-140 <br /> Methyl tert-butyl ether 115 2 5 100 ND 112 60-140 <br /> Surrogate a a a-Trrfluorotoluene 106 100 106 60-140 <br /> Matrix Spike Dup(2070242-MSD1) Source 5207249-14 Prepared&Analyzed 07/24/02 <br /> Benzene 104 050 ugll 100 ND 104 60-140 2 25 <br /> Toluene 109 050 10 0 ND 109 60-140 2 25 <br /> Ethylbenzene 106 050 10 0 ND 106 60-140 2 25 <br /> Xylenes(total) 327 0 50 300 ND 109 60-140 4 25 <br /> Methyl tert-butyl ether 127 25 100 ND 124 60-140 10 25 <br /> Surrogate a a a-Trifluorotoluene 105 100 105 60-140 <br /> equola 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 be reproduced in its entirety <br /> Page Page 12 of 16 <br />