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885 Jarvis Dr <br /> gan Hill,CA <br /> Sequoia Mor (408)776-59600 <br /> qW Analytical FAX(408)782 6308 <br /> www segttocalabs <br /> Secor-Rancho Cordova Project ARCO#4932,Stockton,CA MMB0227 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#4932,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/25/03 11 03 <br /> Total Purgeable Hydrocarbons (C6-C10)by EPA 8015B modified, BTEXM by EPA 8021B-Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Lrnut Notes <br /> Batch 3B11005-EPA 5030B [PIT] <br /> Blank(3B11005-BLKI) Prepared&Analyzed 02/11/03 <br /> Gasoline Range Organics(C6-C10) ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzenc ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tett-butyl ether ND 25 " <br /> Surrogate a a a-Trrfluorotoluene 103 100 103 55-142 <br /> Laboratory Control Sample(3B11005-BSI) Prepared&Analyzed 02/11/03 <br /> Benzene 965 050 ug/1 100 965 68-140 <br /> Toluene 975 050 100 975 76-127 <br /> Ethylbenzene 107 050 100 107 77-130 <br /> Xylenes(total) 31 1 050 300 104 78-128 <br /> Surrogate a a a-Trtfluorotoluene 103 100 103 55-142 <br /> Laboratory Control Sample(3B11005-BS2) Prepared&Analyzed 02/11/03 <br /> Gasoline Range Organics(C6 C10) 243 50 ug/i 250 972 62-134 <br /> Surrogate a a a-Tr�fluorotoluene 109 100 109 55-142 <br /> Matrix Spike(3B11005-MS1) Source Prepared 02/11/03 Analyzed 02/12/03 <br /> Gasoline Range Organics(C6-C10) 896 50 ug/1 550 540 647 62-134 0-11 <br /> Bene 177 050 6 80 9 4 122 68-140 <br /> Toluene 407 050 410 10 968 76-127 <br /> Ethylbenzene 10 8 0 50 9 80 056 104 77-130 Q-23a <br /> Xylenes(total) 504 050 479 ND 105 78-128 Q-23 <br /> Surrogate a a a-Thfluorotoluene 13 4 100 134 55-142 Q-23b <br /> Matrix Spike Du (3BI1005-MSDI) - - - Source — - Prepared 02/11/03 Analyzed 02/12/03 <br /> Gasoline Range Organics(C6-C10) 866 50 ug,9 550 540 593 62-134 341 41 O 11,QM-07 <br /> Benzene 17 1 050 " 6 80 9 4 113 68-140 345 30 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> Thrs analytical report must be reproduced to its entirety <br /> 12 of 21 <br />