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885 larti is <br /> Sequoia Morgan Hill CA 9503737 <br /> 4D (408)776.9600 <br /> Analytical FAX(408)792 6308 <br /> www sequoialabs con <br /> CTS-ecorRancho Cordw,a Project ARCO 92133 Rancho Cordova,CA MMC0823 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO 92133, 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 8015B/8021 B- Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit //nits Level Result %REC Limits RPD Limit Notes <br /> -] <br /> Batch 3030677-EPA 5030,waters <br /> Blank(3030677-BLK1) Prepared&Analyzed 03/31/03 <br /> Gasoline Range Organics ND 50 u9/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 304 300 101 65-135 <br /> Surrogate 4-Bromofluorobenzene 163 300 88 65-135 <br /> Laboratory Control Sample(3030677-BSI) Prepared&Analyzed 03/31/03 <br /> tasoline Range Organics 2540 50 ug/1 2750 _ 92 65-135 <br /> nzene 42 8 0 50 365 117 65-135 <br /> Toluene 206 0 50 203 101 65-135 <br /> Ethylbenzene 48 0 0 50 470 102 65-135 <br /> Xylenes(total) 226 0 50 " 236 96 65-135 <br /> Methyl tert-butyl ether 692 2 5 560 124 65-135 <br /> Surrogate a,a,a-Trifluorotoluene 335 300 111 65-135 <br /> Surrogate 4-Bromofluorobenzene 284 300 95 65-135 <br /> _Matrix Spike(3030677-MSI) Source MMC0823-01 Prepared&Analyzed 03/31/03 _ <br /> Gasoline Range Organics 2530 50 u9/1 2750 ND 92 65-135 <br /> Benzene 426 0 50 365 ND 117 65-135 <br /> Toluene 209 050 203 ND 103 65-135 <br /> Ethylbenzene 49 5 0 50 470 ND 105 65-135 <br /> Xylenes(total) 230 0 50 " 236 ND 97 65-135 <br /> Methyl tert-butyl ether 70 1 2 5 560 IID 125 65-135 <br /> i <br /> i <br /> Surrogate a a a-Trifluorotoluene 316 300 109 65-135 <br /> Surrogate 4-Bromofluorobenzene 174 300 91 65-135 <br /> i <br /> �quoia Analytical-Morgan Hi I] The results in this report apply to the samples analyzed in accordance with the chain <br /> ojcusiody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 10 of 13 <br />