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Ihive <br /> Sequoia IBES JarvisC95037 <br /> Morgan Hill, 77 -9600 <br /> (40$}776-9604 <br /> Analytical FAX(408)782-6308 <br /> www.scquoialabs.com <br /> Secor-Rancho Cordova(ARCO) Project:ARCO#4932,Stockton,CA MOG0595 <br /> 3017 Kilgore Rd,Suite 100 Project Number:GOC8D-0001 Reported: <br /> j Rancho Cordova CA,95670 Project Manager:Clinton Harms 08/01/05 11:10 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> I <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5626006-EPA 5030E PIT/EPA 8260B <br /> Laboratory Control Sample Dup(5G26006-BSDI) Prepared&Analyzed:07/26/05 <br /> Surrogate:1,2-Dichloroethane-d4 5.57 ug/I 5.00 Il l 60-135 <br /> Matrix Spike(5G26006-MSI) Source:MOG0700-01 Prepared&Analyzed:07/26/05 <br /> Benzene 48.8 5.0 ug/l 60,8 ND 80 65-115 <br /> Ethylbenzene 66.2 5.0 78.4 ND 84 75-135 <br /> Methyl Cert-butyl ether 306 5.0 96.0 230 79 65-125 <br /> Toluene 316 5.0 329 ND 96 85-120 <br /> Xylenes(total) 359 5.0 385 ND 93 85-125 <br /> Gasoline Range Organics(C4•C12) 5310 500 4400 750 104 70-124 <br /> Surrogate.1,2-Dichloroethane-d4 5.97 5.00 119 60-135 <br /> Matrix Spike Dup(5G26006-MSD1) Source:MOG0700-01 Prepared&Analyzed:07/26/05 <br /> enzene 51.4 5,0 ugll 60.8 ND 85 65-115 5 20 <br /> thylbenzene 69.6 5.0 78.4 ND 89 75-135 5 15 <br /> Methyl tert•butyl ether 290 5.0 96.0 230 62 65-125 5 20 LN <br /> Toluene 307 5.0 329 ND 93 85-120 3 20 <br /> Xylenes(total) 382 5.0 385 ND 99 85-125 6 20 <br /> Gasoline Range Organics(C4-C 12) 5000 500 4400 750 97 70-124 6 20 <br /> Surrogate:1,2-Dichloroethane-d4 5.15 " 5.00 103 60-135 <br /> Batch 5G27004-EPA 5030B PIT I EPA 8260B <br /> Blank(5G27004-BLK} Prepared&Analyzed:07.127105 <br /> tert-Amyl methyl ether ND 0.50 -ugll <br /> Benzene ND 0.50 " <br /> tett-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethanc(EDB) ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0,50 " <br /> Ethylbenzene ND 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) ND 0,50 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate:l,2-Dichloroethane-d4 2.80 2.50 112 60-135 <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 /> Page 24 of 27 <br />