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Sequoia 885rarvis J)nW <br /> Morgan H41-CA 95037 <br /> A (408)766-9600 <br /> Analytical <br /> FAX(408)782-6308 <br /> www sequoialab&com <br /> Secor-Rancho Cordova Project ARCO#4932,Stockton,CA <br /> 3017 Kilgore Rd Suite 100 MMG0728 <br /> Project Number Arco#4932,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/05/03 14 S8 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Result Lung Units Leve] Result °/REC Limits RFD Lana <br /> Notes <br /> Batch 3H04010-EPA 5430B PIT' <br /> Matrix Spike(3H04010-MS1) Source MM1110001-01RE1 Prepared&Analyzed 08/04/03 <br /> Methyl tert-butyl ether 452 25 ug/1 248 210 976 63-137 <br /> Benzene 179 25 160 62 73 1 78-124 <br /> Toluene QM-07 <br /> 683 25 742 12 904 78-129 <br /> Gasoline Range Organics(C6-C 10) 11900 2500 11000 1500 945 70-113 <br /> Surrogate 12-Dichloroethane-d4 592 S 00 118 78-129 <br /> Matrix Spike Dup(3H0401 0-MSD 1) Source MM110001-01RE1 Prepared&Analyzed 08/04/03 <br /> Methyl tert-butyl ether 443 25 ug/l 246 210 940 63-137 201 13 <br /> Benzene 172 25 160 62 68 8 78-124 399 12 <br /> Toluene QM 07 <br /> 668 25 742 12 88 4 78-129 222 10 <br /> Gasoline Range Organics(C6-C 10) 11500 2500 11000 1500 909 70-113 342 9 <br /> Surrogate 1 2-D:chloroethane-d4 587 500 117 78-129 <br /> Sequoia Analytical-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 /> 17 of 18 <br />