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�l a <br /> Sequoia 885 Jarvis Dine <br /> Morgan Jill/,CA 95037 <br /> r Analytical (48)766-9600 <br /> FAX(4008)782-6308 <br /> www sequowlabs,com <br /> SeeOr-Rancho Cordova Protect ARCO#4932,Stockton,CA <br /> 3017 Kilgore Rd Suite 100 MMG0728 <br /> Project Number Arco#4932,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty$enkosky 08/05/03 14 58 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Arialyte <br /> Reporting Spike Source %REC RPD <br /> Result tutu! Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3G31001 -EPA 5030B PIT <br /> Matrix Spike(3G31001-MSI) Source MMG0729-13 Prepared&Analyzed 07/31/03 <br /> Methyl tert-butyl ether 71700 500 ug/l 9920 50000 219 63-137 <br /> QM-4X <br /> Benzene 5600 500 6400 ND 87 5 78-124 <br /> Toluene 34800 500 29700 320 116 78-129 <br /> Gasoline Range Organics(C6-C10) 510000 50000 440000 87000 96 1 70-113 <br /> Surrogate 1 1-Diehloroethane-d4 561 Soo 112 78-119 <br /> Matrix Spike Du (3G3 100 1-MSDI) Source MMG0728-13 Prepared&Analyzed 07/31/03 <br /> Methyl tert-butyl ether 61300 500 ug/t 9920 50000 114 63-137 15(1 13 <br /> QM-4X <br /> Benzene 5720 500 6400 ND 894 78-124 212 12 <br /> Toluene 34900 500 29700 320 116 78-129 0 287 10 <br /> Gasoline Range Organics(C6-C 10) 499000 50000 440000 87000 936 70-113 2 18 9 <br /> Surrogate 11-Dwhloroethane-d4 547 500 109 78-119 <br /> Batch 3G31008-EPA 5030B P/T <br /> Blank(3G31008-BLKI) Prepared,- 07/31/03 <br /> Ethanol ND 100 ugll <br /> tert-Bury]alcohol ND 20 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl Cert-butyl ether ND 050 " <br /> tat-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-C10) ND 50 " <br /> Surrogate 1 2-Dichloroethane-d4 5 62 '500 111 78 119 <br /> Sequoia 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 basis <br /> This analytical report must be reproduced in its entirety <br /> 13 of 18 <br />