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y / i Sequoia 885Deva <br /> M <br /> �� � organ Hill CA CA 95037 <br /> ^" - (408)776 9600 <br /> 1 ► Analytical FAX(408)7826308 <br /> www sequoialabs com <br /> 7S <br /> RS Corporation[Arcoll Project ARCO#5469, Stockton,CA MN10470 <br /> 28 '0 Gateway Oaks Dr, Ste 300 Project Number N/P Reported <br /> Sacramento CA, 95833 Project Manager Jay Johnson 09/29/04 17 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 %PEC Limits RPD Limit Notes <br /> Batch 4I23011 - EPA 5030B PIT <br /> Matrix Spike Dup(4I23011-MSD1) Source MNI0470-03 Prepared 09/23/04 Analyzed 09/24/04 <br /> Benzene 500 5 0 ug/l 640 ND 78 69-124 2 20 <br /> Ethylbenzene 729 50 75 2 ND 97 84-132 2 20 <br /> Methyl tert-butyl ether 419 5 0 992 360 59 63-137 5 20 LN <br /> Toluene 302 5 0 319 ND 95 78-129 4 20 <br /> Xylenes(total) 354 5 0 366 ND 97 83-137 1 20 <br /> Gasoline Range Organics(C4-C12) 4650 500 4400 450 95 70-124 2 20 <br /> Surrogate 12-Dichloroethane-d4 439 S 00 88 78-129 <br /> �ota 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 hasis <br /> This analytical report must be reproduced to its entirety <br /> Page 14 of 17 <br />