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Sequoia 885Jan i <br /> Morgan Hill CA 95037037 <br /> iW Anal Y tical (408)7769600 <br /> FAX(408)782 6308 <br /> �vww sequotalabs con <br /> Secor-Rancho Cordova Project ARCO#2133, Rancho Cordo,,a CA MMC-0823 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#2133,Rancho Cordova CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/04/03 12 00 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B18021B - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Leve] Result %REC Limits RPD Limit Notes <br /> Batch 3030678-EPA 5030,waters <br /> Matrix Spike 3030678-MS1 Source MMC0823-02 Prepared&Analyzed 03/31/03 <br /> Gasoline Range Organics 2410 50 ug/l 2750 27 87 65-135 <br /> Benzene 403 0 50 365 ND 110 65-135 <br /> Toluene220 050 203 ND 108 65-135 <br /> Ethylbenzene 45 1 0 50 470 ND 96 65-135 <br /> Xylenes(total) 236 0 50 236 ND 100 65-135 <br /> Methyl tert-butyl ether 609 25 560 ND 109 65-135 <br /> Surrogate a a a-Tr fluorotoluene 315 " 300 108 65-135 <br /> Surrogate 4-Bromofluorobenzene 309 " 300 103 65-135 <br /> Matrix Spike Dup(3030678_-M_SDI) Source MMC0823-02 Prepared&Analyzed 03/31/03 <br /> Gasoline Range Organics 2400 50 ug/l 2750 27 86 65-135 04 20 <br /> 0nzene 39 6 0 50 365 ND 108 65-135 2 20 <br /> 0luene 217 0 50 203 ND 107 65-135 1 20 <br /> Ethylbenzene 446 0 50 470 ND 95 65-135 1 20 <br /> Xylenes(total) 232 0 50 " 236 ND 98 65-135 2 20 <br /> Methyl tert-butyl ether 596 25 " 560 ND 106 65-135 2 20 <br /> Surrogate a a a-Trifluorotoluene 329 300 110 65-135 <br /> Surrogate 4-Bromofluorobenzene 318 300 106 65-135 <br /> quota Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a xet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 12 of 13 <br />