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885 Jarvis Drive <br /> CDFAX <br /> Morgan(40Hil77 95037 <br /> Sequoia (408)776-9600 <br /> wwwiWAnalytical (408)782-6308 <br /> gcquoialabs com <br /> 0 <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133,Rancho Cordova,CA MMI0807 <br /> 3017 Kilgore Rd Suite 100 Project Number N/P Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/20/03 16 45 <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 %REC Limits RPD Limit Notes <br /> Batch 3JO9001 -EPA 5030B PIT <br /> Laboratory Control Sample(3J09001-BSI) Prepared&Analyzed 10/09/03 <br /> Ethylbenxene 101 050 ugIl 100 101 84-117 <br /> Xylenes(total) 309 050 300 103 83-125 <br /> Surrogate 12-Dichloroethane-d4 4 71 500 942 78-129 <br /> Laboratory Control Sample(3J09001-BS2) Prepared&Analyzed 10/09/03 <br /> Gasoline Range Organics(C6-C 10) 400 50 ug/l 440 909 70-113 <br /> Surrogate 12-Dichloroethane d4 491 500 982 78-129 <br /> Laboratory Control Sample Dn (3J09001-BSDI) Prepared 10/09/03 Analyzed 10/10/03 <br /> Ethanol 172 100 ugll 200 860 31-186 3 99 37 <br /> tert-Butyl alcohol 579 20 500 116 0-206 1 74 22 0-09 <br /> Methyl tert-butyl ether 947 050 100 947 63-137 0 423 13 <br /> W <br /> isopropyl ether 974 050 100 974 76-130 1 14 9 <br /> thyl ter-butyl ether 9 37 050 100 937 61-141 0 107 9 <br /> cert-Amyl methyl ether 938 050 100 93 8 56-140 140 12 <br /> 1,2-Dichloroethane 996 050 100 996 77-136 295 13 <br /> 1,2-Dibromoethane(EDB) 108 050 10D 108 77-132 1 87 9 <br /> Benzene 967 050 10 0 967 78-124 2 20 12 <br /> Toluene 10 1 050 too 101 78-129 220 10 <br /> Ethylbenzene 982 050 100 982 84-117 2 81 10 <br /> Xylenes(total) 307 0 50 300 102 83-125 0 649 it <br /> Surrogate 12-Dichloroethane-d4 488 500 976 78-129 <br /> Laboratory Control Sample Dup(3J09001-BSD2) Prepared 10/09/03 Analyzed 10/10/03 <br /> Gasoline Range Organics(C6-CIO) 367 50 ug/l 440 83 4 70-113 860 9 <br /> Surrogate 1 2-Dichloroethane-d4 4 84 " 500 968 78-129 <br /> Matrix Spike(3J09001-MSI) Source MMJ0095-05 Prepared&Analyzed !0/09103 <br /> Ethanol 1800 1000 ugll 2000 ND 900 31-186 <br /> tert-Butyl alcohol 15900 200 500 17000 NR 0-206 QM-4X <br /> Methyl tert-butyl ether 948 5 0 100 ND 948 63-137 <br /> Di-isopropyl ether 946 5 0 100 ND 946 76-130 <br /> Ethyl tert-butyl ether 93 5 5 0 100 ND 93 5 61-141 <br /> tert-Amyl methyl ether 93 8 5 0 100 ND 93 8 56-140 <br /> 1,2-Dichloroethane 96 1 5 0 100 ND 96 1 77-126 <br /> 1,2-Dibromoethane(EDB) 105 5 0 100 ND 105 77-132 <br /> Benzene 929 5 0 100 ND 929 78-124 <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 /> 18 of 22 <br />