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95 <br /> Drive <br /> Sequoia BHill C s 5037 <br /> Morgan Hill CA 95037 <br /> (ZN (408)776 9600 <br /> Analytical Www <br /> (409)782 6308 <br /> sequotalabs com <br /> • <br /> Secor- Rancho Cordova(ARCO) Project ARCO#2133,Rancho Cordova,CA MNF0734 <br /> 3017 Kilgore Rd Suite 100 Project Number N/P Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/10/04 11 18 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %RHC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4GO2003-EPA 5030E PIT <br /> Matrix Spike Dup(4G02003-MSDI) Source MNF0628-03 Prepared 07/02/04 Analyzed 07/03/04 <br /> Benzene 295 5 0 ugll 640 260 55 69-124 3 20 QM02 <br /> Ethylbenzene 815 5 0 696 4 4 111 84-132 2 20 <br /> Methyl tert-butyl ether 375 5 0 99 2 270 106 63-137 6 20 <br /> Toluene 360 50 297 47 120 78-129 2 20 <br /> Xylenes(total) 390 50 337 74 114 83-137 0 20 <br /> Gasoline Range Organics(C4-C12) 8550 500 4400 4100 101 70-124 0 1 20 <br /> Surrogate 12-Dichloroethane-d4 531 5 00 106 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 otherwrse stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 10 of I I <br />