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8851aDnve <br /> Sequoia Morgan H 11 CA CA 95037037 <br /> (408)776-9600 <br /> I <br /> iW Analytical FAX 782 6308 <br /> www sequoiequoialabs com <br /> • <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133,Stockton, CA MPCO261 <br /> 3017 Kilgore Rd Suite 100 Project Number Arco#2133, Stockton,CA Reported <br /> Rancho Cordova CA, 95670 Project Manager Brian Carey 04/04/06 13 28 <br /> Volatile Organic Compounds by EPA Metbod 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %R-EC Limits RPD Limit Notes <br /> Batch 6C11005- EPA 50351 EPA 8260B <br /> Laboratory Control Sample(6C11005-BS2) Prepared 03/11/06 Analyzed 03/12/06 <br /> Cert Amyl methyl ether 00173 00050 mg/kg 00163 106 80-130 <br /> Benzene 000557 00050 000504 111 65-125 <br /> tert-Butyl alcohol 0 170 0020 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 0 10 0 165 138 35-150 <br /> Lthyl teri-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 /> nes(total) 00429 00050 00408 105 80-140 <br /> line Range Organics(C4-Cl2) 0 466 010 0440 106 53-126 <br /> Surrogate 12-Dichloroethane-d4 000478 000500 96 60-125 <br /> Laboratory Control Sample Dup(6C11005-BSD1) Prepared 03/11/06 Analyzed 03/12/06 <br /> Cert Amyl methyl ether 00111 00050 mg/kg 00100 111 80-130 0 25 <br /> Benzene 00114 00050 00100 114 65-125 0 20 <br /> tert-Butyl alcohol 0 236 0 020 0200 118 80-165 7 25 <br /> Di-isopropyl ether 00110 00050 00100 110 85-115 0 20 <br /> 1 2 Dibromoethane(EDB) 00109 00050 00100 109 85-130 0 15 <br /> 1 2 Dichloroethane 00126 00050 00100 126 63-124 0 25 HL <br /> Ethanol 0 319 010 0200 160 35-150 4 40 HL <br /> Ethyl tert-butyl ether 00106 00050 00100 106 80-125 0 25 <br /> Ethylbenzene 00114 0 0050 00100 114 80-135 0 9 20 PE <br /> Methyl tert butyl ether 00102 00050 00100 102 75-115 4 35 <br /> Toluene 00122 00050 00100 122 85-125 2 15 <br /> Xylenes(total) 00339 00050 00300 113 80-140 2 20 <br /> Surrogate 1 2-Dichloroethane-d4 000475 000500 95 60-125 <br /> quota 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 wel weight basis <br /> This analytical report most be reproduced in its entirely <br /> Page 16 of 20 <br />