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Drive <br /> Sequoia Jarvis <br /> Hargan Hill CA 95403737 <br /> (448)776 9600 <br /> 1W Analytical FAX(408)7826308 <br /> www sequoialabs coni <br /> Sector-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNH0071 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/06/04 15 45 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC LIMLtS RPD lamd Notes <br /> Batch 4HO6002-EPA 5030E PIT <br /> Laboratory Control Sample(41106002-BSI) Prepared&Analyzed 08/06/04 <br /> Toluene 108 050 ugll 100 108 78-129 <br /> Xylenes(total) 306 050 300 102 83-137 <br /> Surrogate 12 Dichloroerhane-d4 511 500 102 78-129 <br /> Laboratory Control Sample(4H06002-BS2) Prepared&Analyzed 08/06/04 <br /> Benzene 600 0 50 ug/l 640 94 69-124 <br /> Ethylbenzene 8 57 050 696 123 84-132 <br /> Methyl tert-butyl ether 104 0 50 992 105 63-137 <br /> Toluene 365 050 29 7 123 78-129 <br /> Xylenes(total) 39 6 0 50 33 7 118 83 137 <br /> Gasoline Range Organics(C4-C12) 382 50 440 87 70-124 <br /> 014"ogate I 1-Dichloroethane-d4 509 500 102 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 /> Page 7 of 8 <br />