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885 Jarvis,Drive <br /> (DFAXSequoia tvforgan(408) 76.96 0(408}77Cr9600i► wwsequAnalytical8)7826308 <br /> www equoia)abscom <br /> A <br /> Secor-Rancho Cordova(ARCO) Project ARCO#595,Stockton,CA MMJ0263 <br /> 3017 Kilgore Rd Suite 100 Project Number 38983 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/06/03 15 47 ' <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Linins RPD L nut Notes <br /> Batch 3J23005-EPA 5030B Modified <br /> Laboratory Control Sample(3323005-BS2) Prepared&Analyzed 10/23/03 <br /> Methyl tert-butyl ether 8 19 050 ug/l 101 81 1 63 137 <br /> Benzene 548 0 50 648 846 78-124 <br /> Toluene 33 4 050 29 7 112 78-129 <br /> Ethylbenzene 833 050 720 116 84-117 <br /> Xylenes(total) 416 050 337 123 83-125 <br /> Gasoline Range Organics 494 50 440 112 70-113 0-09 <br /> Surrogate 1,2-Dichloroethane-d4 612 500 122 78-129 <br /> -- --Laboratory Control Sample Dup(3J23005-BSD1) _Prepared 10/23/03 Analyzed 10/24/03 <br /> Ethanol 208 100 ug/1 200 104 31-186 23 7 37 <br /> tert-Butyl alcohol 483 20 500 96 6 0-206 164 22 <br /> Methyl tert-butyl ether _ ­886 _ -050 l0 0 Y 896 63-137 _ 147 13 QR-02 <br /> Di-isopropyl ether 941 050 100 94 1 76-130 13 4 9 QR-02 <br /> Ethyl tert-butyl ether 945 050 100 945 61-141 13 1 9 QR-02 qW <br /> tert-Amyl methyl ether 955 050 100 95 5 56-140 163 12 QR-02 <br /> 1,2-Dichloroethane 103 050 100 103 77-136 903 13 <br /> 1,2-Dibromoethane(EAB) 981 050 100 98 1 77-132 113 9 QR-02 <br /> Benzene __050___L'_ -_10 0_ F �—97 6 78-124_- _8 66____12- <br /> Toluene 103 050 100 103 78-129 683 10 <br /> Ethylbcn=ne - - -- - 107— ­050— 100-- —, 107.----- 84-117 3 81 10 <br /> Xylenes(total) 322 05 0 30 0 107 83-125 608 11 <br /> Surrogate 1,2-Dichloroethane-d4 560 Soo 111 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/l 101 783 63-137 348 13 <br /> Beiaeria c Al n 50 6 4R 944 78-124 0 183 12 <br /> Toluene 31 3 0 50 297 105 78-129 649 10 <br /> Ethylbenzene 7 S6 050 720 109 84-117 581 10 <br /> Xylenes(total) _ 38 4 050 33 7 114 83-125 800 11 <br /> Gasoline Range Organics 439 50 440 99 8 70-113 118 9 QR-02 <br /> Surrogate 12-Dichloroethane-d4 5 72 500 114 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 /> 14 of 16 <br />