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885 Jarvis Drive <br /> Sequoia Morgan Hill CA 95037 <br /> Analytical (408)776-9600 <br /> FAX(408)7$2-6308 <br /> www sequotalabscom <br /> i <br /> Secor-Rancho Cordova(ARCO) Project ARCO#14932,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 Limn Units Level Result %REC Limits RPD Liiint Notes <br /> Batch M22020-EPA 5030B Modified <br /> Matrix Spike(3J22020-MSI) Source MMJ0401-02 Prepared 10/22/03 Analyzed 10/23/03 <br /> Methyl tent butyl ether 297 050 ug/l 101 21 861 63-137 <br /> Benzene 553 050 648 0 11 83 6 78-124 <br /> Toluene 34 1 050 29 7 12 111 78-129 <br /> Ethylbenzene 8 18 050 720 0 25 110 84 117 <br /> Xylenes(total) 417 0 50 337 13 120 83-125 <br /> Gasoline Range Organics 457 50 440 ND 104 70-113 <br /> Surrogate 12-Dichloroethane-d4 585 500 117 78-129 <br /> Matrix Spike Dup(3J22020-MSDI) Source MMJ0401-02 Prepared 10/22/03 Analyzed 10/23/03 <br /> Methyl tert butyl ether 284 050 ug/1 101 21 733 63-137 448 13 <br /> Benzene 527 050 648 0 11 796 78-124 481 12 <br /> Toluene 312 050 29 7 12 101 78-129 888 10 <br /> Ethylbenzene 767 050 720 025 103 84-117 644 10 <br /> Xylenes(total) 38 6 050 33 7 1 3 111 83-125 7 72 11 <br /> Gasoline Range Organics 425 50 440 ND 966 70-113 726 9 <br /> Surrogate 11-Dichloroethane-d4 5 90 500 118 78 129 <br /> Batch 3J23005-EPA 5030B Modified <br /> Blank(3J23005-BLK1) Prepared&Analyzed 10/23/03 <br /> Ethanol ND 100 ug/l <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tett-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibrornoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics ND 50 0-09 <br /> Surrogate 1 2-Dichloroethane-d4 585 500 117 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 to its entirety <br /> 18 of 21 <br />