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wi q <br /> 1 <br /> +� 885 Jarvis Dr <br /> Sequoia Morgan Hill CA 95037 <br /> Analytical (408)776-9600 <br /> FAX(408)782-6308 <br /> www sequoralabs.com <br /> Secor-Rancho Cordova Project ARCO#595,Stockton,CA MMD0354 <br /> 3017 Kilgore Rd Suite 100 Project Number 26204 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/23/03 09 30 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %aREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3D16003-EPA 5030B PIT <br /> Blank(3D16003-BLK1) Prepared&Analyzed 04/16/03 <br /> Ethanol ND 100 ug/l <br /> tett-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di isopropyl ether ND 050 " <br /> Ethyl tent-butyl ether ND 050 " <br /> tett-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C6-C 10) ND 50 " <br /> Aft <br /> 'Wurrogate 1 1-Drchloroethane-d4 507 500 101 78-129 <br /> Laboratory Control Sample(3D16003-BS1) Prepared&Analyzed 04/16/03 <br /> Methyl tent-butyl ether 107 050 ug/1 100 107 63-137 <br /> Benzene 953 050 100 95 3 78-124 <br /> Toluene 975 050 100 97 5 78-129 <br /> Surrogate 1,1-Drchloroethane-d4 540 500 108 78-129 <br /> Laboratory Control Sample(3D16003-BS2) Prepared&Analyzed 04/16/03 <br /> Methyl tert-butyl ether 849 050 ug/I 904 93 9 63-137 <br /> Benzene 459 050 544 844 78-124 <br /> Toluene 282 050 328 860 78-129 <br /> Gasoline Range Organics(C6-C10) 386 50 440 87 7 70-113 <br /> Surrogate 12-Drchloroethane-d4 499 500 998 78-119 <br /> Sequoia Analytical-Morgan Hill The results to 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 /> 13 of 16 <br />