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ri it <br /> '1 885 Jarvis Dr <br /> Sequoia Morgan Hill CA 95037 <br /> Analytical equo labsc 00 <br /> FAX(409)7826308 <br /> www sequoialabscom <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 %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3D16003-EPA 5030B P/T <br /> Matrix Spike(3D16003-MS1) Source MMD0127-01 Prepared&Analyzed 04/16/03 <br /> Methyl tert-butyl ether 303 50 ug/l 904 250 S86 63-137 QM-07 <br /> Benzene 470 50 544 ND 864 78-124 <br /> Toluene 295 50 328 ND 899 78 129 <br /> Gasoline Range Organics(C6-C 10) 4090 500 4400 210 88 2 70-113 <br /> Surrogate 12-Dichloroethane-d4 522 500 104 78-129 <br /> Matrix Spike Dup(3D16003-MSD1) Source MMD0127-01 Prepared&Analyzed 04/16/03 <br /> Methyl tert-butyl ether 299 50 ug/l 904 250 542 63-I37 133 13 QM-07 <br /> Benzene 49 2 50 544 ND 90 4 78-124 4 57 12 <br /> Toluene 304 5 0 328 ND 927 78-129 301 10 <br /> Gasolme Range Organics(C6-C 10) 4230 500 4400 210 91 4 70-113 337 9 <br /> urrogate 12-Dichloroethane-d4 507 5 00 101 78-119 <br /> Batch 3D18001 -EPA 5030B P/T <br /> Blank(3D18001-BLK1) Prepared&Analyzed 04/18/03 <br /> Ethanol ND 100 ug/l <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-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 /> Surrogate 1 2-Dichloroethane-d4 500 500 100 78-129 <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 /> 14 of 16 <br />