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995 Jarvis Dr <br /> Sequoia Mcrgin Hill,CA 95037 <br /> 4D (408)776-9600 <br /> qW Analytical FAX(408)782-6308 <br /> www sequoiala6s <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 1103 <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 Resuit %REC Limits RPD Linut Notes <br /> Batch 3BI2005-EPA 5030B(P/`1'] <br /> Blank(3B12005-BLKI) Prepared&Analyzed 02/12/03 <br /> Surrogate a a a-Trifluorotoluene 9 74 ug17 100 974 55-141 <br /> Laboratory Control Sample(3B12005-BS1) Prepared&Analyzed 02/12/03 <br /> Benzene 957 050 ug/1 10 0 957 68-140 <br /> Toluene 9 84 050 10 0 984 76-127 <br /> Ethylbenzene 9 75 050 10 0 975 77-130 <br /> Xylenes(total) 281 050 300 937 78-128 <br /> Surrogate a a,a-Trifluorotoluene 101 100 101 55-142 <br /> Laboratory Control Sample(3B12005-BS2) Prepared&Analyzed 02/12/03 <br /> Gasoline Range Organics(C6-C10) 287 50 ug/I 250 115 62 134 <br /> Surrogate a a a-Trifluorotoluene 105 11100 105 55-142 <br /> Matrix Spike(3BI2005-MS1) Source MMB0210-03 Prepared 02/12/03 Analyzed 02/13/03 <br /> Gasolmc Range Organics(C6-C10) 277 50 ug/I 550 ND 50 4 62-134 QM-07 <br /> Benzene 582 050 6 80 ND 856 68-140 <br /> Toluene 204 050 410 ND 498 76-127 QM-07 <br /> Ethylbenzene 4 66 0 50 9 80 ND 47 6 77-130 QM-07 <br /> Xylenes(total) 232 050 479 ND 48 4 78-128 QM-07 <br /> Surrogate aaa-Trifluorotoluene 110 100 110 55-142 <br /> Matrtx Spike Dup(3B12005-MSDI) Source MMB0210-03 Prepared 02/12/03 Analyzed 02/13/03 <br /> Gasoline Range Organics(C6-C10) 358 50 ug/l 550 ND 65 1 62-134 25 5 41 <br /> Benzene 102 050 6 80 ND 150 68-140 547 30 QM-07 <br /> Toluene 376 050 410 ND 917 76-121 593 30 QR-07 <br /> Ethylbenzene 9 33 050 9 80 ND 952 77-130 668 21 QR-07 <br /> Xylenes(total) 457 050 479 ND 954 78-128 653 21 QR-07 <br /> Surrogate aaa-Trri luorotoluene = = _-105 - - — - -- -_ <br />