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Sequoia 1455 McDowell BBllvd,North Ste D <br /> a ulna.CA 94954 <br /> (707)792-1865 <br /> l r' Analytical FAX(707)792-0342 <br /> - www sequoialabs corn <br /> tS Corp-Sacramento Project Arco Site 2130,Stockton,CA P306252 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50293 Reported- <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/27/03 17 13 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result L=t Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3060630-EPA 5030 waters <br /> Blank(3060630-BLK1) Prepared&Analyzed 06/24/03 <br /> Tert-amyl methyl ether ND 10 ug/1 <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 10 " <br /> Ethanol NII 100 " <br /> Ethyl text butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate Dibrornofluoromethane 465 450 103 84-122 <br /> Surrogate 12-Dichloroethane-d4 461 450 102 74-135 <br /> Surrogate Toluene-& 502 450 772 84-119 <br /> Laboratory Control Sample(3060630-BS1) Prepared&Analyzed 06/24/03 <br /> Tert-amyl methyl ether 522 10 ug/1 500 104 70-116 <br /> zropyl <br /> tyl alcohol 850 20 100 85 62-142 <br /> ether 478 10 500 96 71-121 <br /> Ethyl tert-butyl ether 483 10 " Soo 97 71-110 <br /> Methyl tert-butyl ether 496 050 500 99 77-123 <br /> Surrogate Dtbromofluoromethane 439 450 98 84-122 <br /> Surrogate 1,2 Dschloroethane-d4 447 450 99 74-135 <br /> Surrogate Toluene-8 460 450 102 84-119 <br /> Matrix Spike(3060630-MS1) Source P306252-01 Prepared 06/24/03 Analyzed 06/25/03 <br /> Tert-amyl methyl ether 501 10 ug/l 500 ND 100 70-116 - <br /> Tert-butyl alcohol 125 20 " 100 10 115 62-142 <br /> Di-isopropyl ether 476 10 500 ND 95 71-121 <br /> Ethyl tert-butyl ether 472 10 " Soo ND 94 71-110 <br /> Methyl tent-butyl ether 122 050 " 500 84 76 77-123 Q-LIM <br /> Surrogate Dtbromofluoromethane 441 450 98 84-122 <br /> Surrogate 12-Dichloroethane-d4 458 450 102 74-135 <br /> Surrogate Toluene-& 481 450 107 84-119 <br /> uoia Analytical-Petaluma 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 /> Thts analytical report must be reproduced in its entirety <br /> Page 23 of 27 <br />