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•i�D 8Hi Jarvis Drive037 <br /> Sequoia Morgan Hill CA 95037 <br /> Analytical (408)776-9600 <br /> FAX equoi lab 6308 <br /> our <br /> www sequorala6s cOm <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133, Stockton,CA MPCO246 <br /> 3017 Kilgore Rd Suite 100 Project Number Arco#2133, Stockton,CA Reported <br /> Rancho Cordova CA, 95670 Project Manager Brian Carey 04/11/06 09 55 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source °/aRFC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 6C11005-EPA 5035/EPA 8260B <br /> Blank(6C11005-BLK1) Prepared 03/11/06 Analyzed 03/12/06 <br /> Toluene ND 00050 mg/kg <br /> Xylenes(total) ND 00050 " <br /> Gasoline Range Organics(C4-C 12) ND 0 10 " <br /> Sun ogaie 12-Drchloroethane-d4 000470 000500 94 60-125 <br /> Laboratory Control Sample(6C11005-BSI) Prepared 03/11/06 Analyzed 03/12/06 <br /> Cert Amyl methyl ether 00111 00050 mg/kg 00100 111 80-130 <br /> Benzene 00114 00050 00100 114 65-125 <br /> teri Butyl alcohol 0 220 0 020 0200 110 80-165 <br /> Di isopropyl ether 00110 00050 00100 110 85-115 <br /> 1 2-Dibromoethane(EDB) 00109 00050 00100 109 85-130 <br /> -Dichloroethane 00126 00050 00100 126 63-124 HL <br /> of 0306 010 0200 153 35-150 HL <br /> yl Cert-butyl ether 00106 00050 00100 106 80-125 <br /> Ethylbenzene 00115 00050 00100 115 80-135 PE <br /> Methyl tert butyl ether 00106 00050 00100 106 75-115 <br /> foluene 00124 00050 00100 124 85-125 <br /> Xylenes(total) 00345 00050 00300 115 80-140 <br /> Sun ogale 1 2-Dichloroethane-d4 000479 000500 96 60-125 <br /> Laboratory Control Sample(6C11005-BS2) Prepared 03/11/06 Analyzed 03/12/06 <br /> tori-Amyl methyl ether 00173 00050 mglkg 00163 106 80-130 <br /> Benzene 000557 00050 000504 ill 65-125 <br /> tert-Butyl alcohol 0 170 0 020 0 169 101 80-165 <br /> Di isopropyl ether 00161 00050 00162 99 85-115 <br /> 1 2-Dibromoethane(EDB) 00160 00050 00166 96 85-130 <br /> 1,2-Dichloroethane 00186 00050 00155 120 63-124 <br /> Ethanol 0 228 010 0 165 138 35-150 <br /> Ethyl ten-butyl ether 00162 00050 00164 99 80-125 <br /> Ethylbenzene 000814 00050 000728 112 80-135 PE <br /> Methyl tert butyl ether 000815 00050 000784 104 75-115 <br /> Toluene 00417 00050 00380 110 85-125 <br /> Xylenes(total) 00429 00050 00408 105 80-140 <br /> Gasoline Range Organics(C4-C12) 0 466 010 0 440 106 53-126 <br /> Surrogate 12-Drchloroethane-d4 000478 000500 96 60-125 <br /> quota Analytical - Morgan Htll The results rn rhes report apply to the samples analyzed rn accordance with the churn of <br /> cicstady document Unless otherwise slated results are reported on a wet weight bases <br /> This analytical report must be reproduced in its entirety <br /> Page 22 of 28 <br />