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885 Jarvis Drive <br /> � Sequoia Morgan Hill,CA95437 <br /> (408)776-9640 <br /> W Analytical FAX(408)782,6308 <br /> www sequotalabscorn <br /> i <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MMJ0401 <br /> 3017 Kilgore Rd Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/06/03 08 05 <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 Limlis APD Liitiit Notes <br /> Batch 3J23005-EPA 5030B Modified <br /> Laboratory Control Sample Dup(3J23005-BSD]) Prepared 10/23/03 Analyzed 10/24/03 <br /> Surrogate 1 2-Dichloroethane-d4 560 119/1 500 112 78-129 <br /> Laboratory Control Sample Dup(3J23005-BSD2) Prepared 10/23/03 Analyzed 10/24/03 <br /> Methyl tert-butyl ether 791 050 ug/I 101 78 3 63 137 348 13 <br /> Benzene 547 050 648 844 78-124 0 183 12 <br /> Toluene 313 050 297 105 78-129 649 10 <br /> Ethylbenzene 7 86 050 720 109 84-117 5 81 10 <br /> Xylenes(total) 38 4 050 337 114 83-125 800 11 <br /> Gasoline Range Organics 439 50 440 998 70-113 11 8 9 QR 02 <br /> Surrogate 1 2-Dichloroethane-d4 5 71 500 114 78-119 <br /> Matrix Spike(3J23005-MS1) Source MMJ0263-10 Prepared&Analyzed 10/23/03 <br /> Methyl tert-butyl ether 274 12 ug/I 252 86 746 63-137 <br /> Benzene 138 12 162 2 5 83 6 78-124 Is <br /> Toluene 810 12 742 3 0 109 78-129 <br /> Ethylbenzene 198 12 180 ND 110 84-117 <br /> Xylenes(total) 992 12 842 ND 118 83-125 <br /> Gasoline Range Organics 11000 1200 11000 ND 100 70-113 009 <br /> Surrogate 1 2-Dichloroethane-d4 613 500 123 78-129 <br /> Matrix Spike Dup(3J23005-MSDI) Source MMJ0263-10 Prepared&Analyzed 10/23/0.3 <br /> Methyl cert-butyl ether 246 12 ug/1 252 86 635 63-137 108 133 <br /> Benzene 131 12 162 2 5 793 78-124 520 12 <br /> Toluene 837 12 742 30 112 78-129 3 28 10 <br /> Ethylbenzene 205 12 180 ND 114 84-117 347 10 <br /> Xylencs(total) 1030 12 842 ND 122 83-125 3 76 11 <br /> Gasoline Range Organics 11900 1200 11000 ND 108 70-113 786 9 0.09 <br /> Surrogate 1 1-Dichloroethane-d4 504 500 101 78-129 <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 /> 20 of 21 <br />