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Sequoia 885JarvisC 5037 <br /> '"���"a Morgan Hip CA 95437 <br /> (408)776 9600 <br /> FAX 308 <br /> qW Analytical www <br /> labs82 co, <br /> www sequoialabs coin <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNG0371 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/03/04 16 21 <br /> Purgeable Hydrocarbons and Volatile Organic Compounds by EPA method 8260B -Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spice Source %REC RPD <br /> Analyte Result limit Units Level Result %REC Limits RPD limit Notes <br /> Batch 4G23004-EPA 5030B PIT <br /> Blank(4G23004-BLK1) Prepared&Analyzed 07/23/04 <br /> Methyl tert-butyl ether ND 050 ug/l <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate 1 2-Dtchloroethane-d4 232 2 50 93 78-129 <br /> Laboratory Control Sample(4G23004-BS1) Prepared&Analyzed 07/23/04 <br /> Methyl tert-butyl ether 9 53 0 50 ug/l 10 0 95 63-137 <br /> Benzene 934 050 100 93 69-124 <br /> Toluene 961 0 50 100 96 78 129 <br /> Bthylbenzene 101 0 50 100 101 84-132 <br /> Xylenes(total) 31 0 0 50 300 103 83-137 <br /> Surrogate 11-Dcchloroethane-d4 219 150 88 78-129 <br /> Laboratory Control Sample(4G23004-BS2) Prepared&Analyzed 07/23/04 <br /> Methyl tert-butyl ether 872 050 ug/1 992 88 63-137 <br /> Gasoline Range Organics(C4-C12) 445 50 440 101 70-124 <br /> Benzene 546 0 50 640 85 69-124 <br /> Toluene 31 3 050 29 7 105 78-129 <br /> Ethylbenzene 793 0 50 696 114 84-132 <br /> Xylenes(total) 395 050 33 7 117 83-137 <br /> Surrogate 1,1-Dichloroethane-d4 213 250 89 78-129 <br /> Laboratory Control Sample Dup(4G23004-BSDI) Prepared&Analyzed 07/23/04 <br /> Methyl tert-butyl other 842 050 ug/l 10 0 84 63-137 12 20 <br /> Benzene 937 050 10 0 94 69-124 0 3 20 <br /> Toluene 946 050 10 0 95 78-129 2 20 <br /> Ethylbenzene 10 0 050 10 0 100 84-132 1 20 <br /> Xylenes(total) 305 050 30 0 102 83-137 2 20 <br /> Surrogate 11-Dichloroethane-d4 107 150 83 78-119 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed to 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 /> Page 13 of 24 <br />