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865 Drive <br /> Sequoia Morgan Hill, <br /> CA l,CA 950375037 <br /> a— ) <br /> ► Analytical FAX(408)7826308 <br /> www se uoialabs core <br /> Sector-Rancho Cordova Project ARCO#2133,Rancho Cordova,CA <br /> 3017 Kilgore Rd Stute 100 Project Number ARCO#2133,Racho Cordova,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/21/02 17 13 <br /> Total Purgeable Hydrocarbons(C6-C10) by EPA 8015B modified, BTEW by EPA 8021B -Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2JO8001-EPA 5030B[P/T] <br /> Blank 2J08001-BLK1 Prepared&Analyzed 10/08/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 103 100 103 70-130 <br /> LCS(2J08001-BS1) Prepared 10/08/02 Analyzed_ 10/2_0/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/I 62-134 <br /> Benzene 930 050 " 10 0 93 0 70-130 <br /> Toluene 932 0 50 " 10 0 932 70-130 <br /> Ethylbenzene 896 0 50 10 0 896 70-130 <br /> ylenes(total) 292 0 50 I 30 0 973 70-130 <br /> Surrogate a a a-Trifluorotoluene 894 100 894 70-130 <br /> LCS 2.108001-BS2 Prepared&Analyzed 10/08/02 <br /> Gasoline Range Organics(C6-C10) 226 50 ug/1 250 904 70-130 <br /> Benzene ND 0 50 68-140 <br /> Toluene ND 0 50 76-127 <br /> Ethylbenzene ND 0 50 77-130 <br /> Xylenes(total) ND 0 50 78-128 <br /> Surrogate a a a-Trrfluorotoluene 962 100 962 70-130 <br /> Matrix Spike(2J08001-MSI) Source MLI0799-01 Prepared&Analyzed 10/08/02 <br /> Gasoline Range Organics(C6-C 10) 442 50 ug/1 550 ND 804 60-140 <br /> Benzene 5 61 050 6 60 ND 85 0 60-140 <br /> Toluene 37 7 050 39 7 ND 950 60-140 <br /> Ethylbenzene 829 050 920 ND 889 60-140 <br /> Xylenes(total) 40 8 050 46 1 ND 88 5 60-140 <br /> Surrogate a a a-Trifluorotoluene 108 100 108 70-130 <br /> Sequoia Analytical-Morgan Hill 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 /> 12 of 15 <br />