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Dr <br /> a— ) <br /> 895Yarns37Sequoia Morgan(409)776 96t)0 <br /> W Analytical FAX(408)782 63oa <br /> www sequoialabs com� <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNG0370 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/20/04 09 33 <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 %aREC Limits RPD Llmtt Notes <br /> Batch 4GI9006-EPA 5030B PIT <br /> Laboratory Control Sample Dup(4G19006-BSD2) Prepared&Analyzed 07/19/04 <br /> Benzene 5 13 050 ug/l 640 80 69-124 9 20 <br /> Ethylbenzene 765 050 696 110 84-132 5 20 <br /> Methyl tent butyl ether 871 050 992 88 63-137 3 20 <br /> Toluene 305 050 297 103 78-129 4 20 <br /> Xylenes(total) 380 050 33 7 113 83-137 6 20 <br /> Gasoline Range Organics(C4-C 12) 443 50 440 101 70-124 7 20 <br /> Surrogate 1 1-Dichloroethane-d4 494 500 99 78-129 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the sham 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 0 <br /> Page 9 of I I <br />