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V� 8851 CA 5037 <br /> Drive <br /> Sequoia Wigan I'll CA 95037 <br /> (408)776 9600 <br /> 1W Analytical FAX(408)7926308 <br /> J www sequorelabs com <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MOJ0547 <br /> 3017 Kilgore Rd Suite 100 Project Number GOC8D-0001 Reported <br /> Rancho Cordova CA,95670 Project Manager Clinton Harms 10/20/05 12 56 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Ltmu Units Level Result %REC Limits RPD Lunn Notes <br /> Batch 5317010-EPA 5030B PIT/EPA 8260B <br /> Blank(5317010-BLK1) Prepared&Analyzed 10/17/05 <br /> Cert-Amyl methyl ether ND 050 ugll <br /> Benzene ND 050 " <br /> Cert-Butyl alcohol ND 5 0 <br /> Di-isopropyl ether ND 050 " <br /> 12-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1 2-Dichloroethane-d4 521 Soo 104 60 135 <br /> Laboratory Control Sample(5J17010-BSI) Prepared&Analyzed 10/17/05 <br /> tert-Amyl methyl ether 17 1 050 ug/! 150 114 80-115 <br /> Benzene 534 050 5 16 103 65 115 <br /> tert-Butyl alcohol 158 5 0 " 143 110 75-150 <br /> Di-isopropyl ether 16 7 050 151 111 75 125 <br /> 1,2-Dibromoethane(EDB) 183 050 149 123 85-120 HL <br /> 1,2-Dichloroethane 16 3 050 " 147 111 85 130 <br /> Ethanol 152 100 142 107 70-1135 <br /> Ethyl tent-butyl ether 17 0 050 15 0 113 75 130 <br /> Ethylbenzene 766 050 7 54 102 75 135 <br /> Methyl Cert-butyl ether 768 050 702 109 65 125 <br /> Toluene 39 1 050 " 372 105 85 120 <br /> Xylenes(total) 40 2 050 412 98 85 125 <br /> Gasoline Range Organics(C4-C12) 496 50 " 440 113 60-140 <br /> Surrogate 12-Dichloroethane-d4 523 500 105 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 slated results are reported on a wet weight oasts <br /> . Thrs analytical report must be reproduced in its entirety <br /> Page 22 of 24 <br />