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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792 1865 <br /> a— ) <br /> w Analytical FAX(707)792 0342 <br /> 0 www sequotalabs com <br /> Seeor-Rancho Cordova Protect Arco Site 2133 P306554 <br /> 3017 Kilgare Road Suite 100 Project Number 38982 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/02/03 18 02 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 801513/8021B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3060704-EPA 5030,waters <br /> Blank 3060704-BLK1) Prepared&Analyzed 06/27/03 <br /> Gasoline Range Organics ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 312 300 104 65-135 <br /> Surrogate 4-Bromofluorobenzene 268 300 89 65-135 <br /> Laboratory Control Sample 3060704-BS1 Prepared&Analyzed 06/27/03 <br /> Gasoline Range Organics 2070 50 ugll 2750 75 65-135 <br /> Benzene 39 8 0 50 33 5 119 65-135 <br /> �oluene 204 0 50 ii 202 101 65-135 <br /> Ethylbenzene 476 0 50 475 100 65-135 <br /> Xylenes(total) 230 0 50 240 96 65-135 <br /> Methyl tert-butyl ether 48 3 2 5 54 5 89 65-135 <br /> Surrogate a a a-Trifluorotoluene 346 340 115 65-135 <br /> Surrogate 4-Bromofluorobenzene 179 300 93 65-135 <br /> Matrix Spike(3060704-MS1) Source P306429-01 Prepared&Analyzed 06/27/03 <br /> Gasoline Range Organics 2160 50 ug/l 2750 ND 79 65-135 <br /> Benzene 38 4 0 50 33 5 022 114 65-135 <br /> Toluene 200 0 50 202 0 15 99 65-135 <br /> Ethylbenzene 469 0 50 475 ND 99 65-135 <br /> Xylenes(total) 226 0 50 240 0 46 94 65-135 <br /> Methyl tert-butyl ether 131 2 5 54 5 89 77 65-135 <br /> Surrogate a a a-Trifluorotoluene 337 300 112 65-135 <br /> Surrogate 4 Bromofluorobenzene 289 300 96 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> afcustody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 8 of 11 <br />