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1885 Jarvis Chive <br /> Sequoia Morgan Hill,CA 45037 <br /> a- )� <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> • www.sequoialabs.cont <br /> Secor-Rancho Cordova(ARCO) Project:ARCO#4932,Stockton,CA MOG0595 <br /> 3017 Kilgore Rd.Suite 100 Project Number:GOC8D-0001 Reported: <br /> 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 /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %uREC Limits RPD Limit Notes <br /> Batch 5G25006-EPA 5030B PIT/EPA 8260B <br /> Laboratory Control Sample Dup(SG25006-BSDI) Prepared&Analyzed:07/25/05 <br /> Surrogate:1,2-Dichloroeihane-0 2.13 u9/1 2.50 85 60-135 <br /> Matrix Spike(5G25006-MS1) Source:MOG0499-02 Prepared&Analyzed:07125105 <br /> Benzene 305 2.5 ugR 30.4 330 NR 65-115 <br /> Ethylbenzene 294 2.5 39.2 270 61 75-135 BB,LM <br /> Methyl tert-butyl ether 39.8 2.5 48.0 1.5 80 65-125 <br /> Toluene 172 2.5 164 5.0 102 85-120 <br /> Xylenes(total) 619 2.5 192 460 83 85-125 <br /> Gasoline Range Organics(C4-C 12) 7900 250 2200 5400 114 70-124 <br /> Surrogate:1,2-Dichtoroethane-d4 3.52 2.50 141 60-135 LH <br /> Matrix Spike Dup(5G25006-MSD1) Source:MOG0499-02 Prepared&Analyzed:07/25/05 <br />! Menzene 304 2.5 ugll 30.4 330 NR 65-115 0.3 20 <br /> thylbenzene 298 2.5 39.2 270 71 75-135 1 15 BB,LM <br /> Methyl tert-butyl ether 39.8 2.5 48.0 1.5 80 65-125 0 20 <br /> Toluene 174 2.5 164 5.0 103 85-120 1 20 <br /> Xylenes(total) 621 2.5 192 460 84 85-125 0.3 20 <br />! Gasoline Range Organics(C4-C 12) 7890 250 2200 5400 113 70-124 0.1 20 <br /> Surrogate:l,2-Dichloroethane-d4 3.36 2.50 134 60-135 <br /> Batch 5G25011-EPA 5030B PIT 1 EPA 8260B <br /> Blank(5G25011-BLKI) Prepared&Analyzed:07/25/05 <br /> tert-Amyl methyl ether ND 0,50 ugll <br /> Benzene ND 0.50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 " <br /> 1,2-Dichlomethane ND 0.50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Methyl cert-butyl ether ND 4.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) ND 0.50 j <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> Surrogate:1,2-Dichloroethane-d4 2.56 2.50 102 60-135 <br /> I <br /> ! <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of ! <br /> custody documen[.Unless otherwise slated results are reported on a wet weight basis. <br /> • This analytical report must he reproduced in its entirety. <br /> Page 16 of 27 <br />