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at * <br /> 885 Jarvis Dr <br /> Sequoia Morgan HiQ,CA 95037 <br /> Analytical FAX(40840$)'7$2-69608 <br /> lowwww sequoialabs cam <br /> Secor-Rancho Cordova Project ARCO#595, Stockton,CA MMA0549 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/25/03 10 42 <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 %REC Limits RPD Limn Notes <br /> Batch 3BO9003-EPA 5030B [PIT) <br /> Matrix Spike Dap(3B09003-MSD1) Source Prepared 01/31/03 Analyzed 02/01/03 <br /> Toluene 650 020 ug/l 820 ND 790 68-121 0 463 29 <br /> Ethylbenzene 171 020 1 96 ND 872 75-125 000 32 <br /> Xylenes(total) 8 10 020 958 ND 846 76-121 0 247 29 <br /> Surrogate a a a-Tr{fluorotoluene 205 200 102 56-134 <br /> �equoia Analyttcal-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 /> This analytical report must be reproduced in its entirety <br /> 19 of 22 <br />