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i <br /> 4 4, tr .. ..µ, <br /> 5 3865 Jarvis DnVe <br /> 5037 <br /> Sequoia tvtprganHil] CA95037 <br /> (408)776 9600 <br /> Analytical FAX(408)792 6308 <br /> www sequoialabs coin <br /> r r ' <br /> Secor-Rancho Cordova(ARCO) Project ARCO##0595,Stockton, CA MNA0270 <br /> 3017 Kilgore Rd Suite 100 Project Number' 38983 -- ,- t.r _ _Reported _ <br /> Raiwiio Cotdays CA,95670 Project Manager ltttaty Renkoskv 01/26/04 14 13 <br />- -- ~ -- ________ Volatile Organic Compounds by-EPA-Method 8260B-,Quality.Control W _ <br /> Sequoia Analytical- Morgan Hill 0 <br /> Reporting Spike Source %REC RPD <br /> Analyte _ Result _ Limit v Umts -Level Result %REC Limits RPD Limit_ Notes <br /> Batch 4A20011 -EPA 5030B PIT <br /> Laboratory Control Sample Dup(4A20011-BSD2) Prepared 01/20/04 Analyzed 01/21/04 _ <br /> Methyl tert-butyl ether 906 0 50 ugA 992 91 3 63-137 1 89 20 <br /> Benzene 5 78 050 640 90 3 69-124 4 96 20 <br /> Toluene 34 6 0 50 29 7 116 78-129 4 73 20 <br /> Ethylbenzene 8 57 0 50 6 96 123 84-132 4 53 20 <br /> Xylenes(total) 43 1 0 50 33 7 1 128 83-137 3 30 20 <br /> Gasoline Range Organics 435 50 440 a, 1198 9 70-113 4 95, 9 <br /> Surrogate 12-Dichloroethane-d4 529 5 00 106 78-119 <br /> `Matrix Spike(4A20011-MSI)--------Source MNA0128-01_r--- --Pre ared&Anaf ed 0l/24/04_____4_ - <br /> Ethanol 9040 5000 ug/l 10000 ND 90 4 31-143 <br /> tert-Butyl alcohol 2530 1000 2500 ND 101 56-131 <br /> Methyl tert-butyl ether 2250 , 25 500 -1700 110- 63.137 <br /> Di-isopropyl ether 572 25 500 ND` 114 76 130 <br /> Ethyl tert-butyl ether 582 25 500 ND 116 81-121 <br /> tent-Amyl methyl ether 540 25 500 ND 108 82-140 <br /> 1,2-Dichloroethane 572 25 500 ND 114 77-136 <br /> 1,2-Dibromoethane(EDB) 564 25 500 ND 113 77-132 <br /> 4 <br />- Benzene x_69-124_ <br /> Toluene 545 25 500 ND 109 78-129 <br /> Ethylbenzene - -� _ -- 518----- ---25 =- ---- 500w-- ND..._._. 104_....._84-132 <br /> Xylenes(total) 1600 25 1500 ND 107 83-137 <br /> Surrogate 1 2-Dichloroethane-d4 5 13 1 500 103 78-129 <br /> Matrix Spike Du 4A20011-MSD1 Source MNA0128-01 Prepared&Analyzed 01/20/04 <br /> Ethanol 7830 5000 USA 10000 ND 78 3 31-143 14 3 20 <br /> alcohol 25 10 11100 " 2500 ND 100 56-131 0 794 20 <br /> Methyl tert-butyl ether 2110 25 500 1700 820 63-137 642 20 <br /> Di-isopropyl ether 561 25 500 ND 112 76-130 1 94 20 <br /> Ethyl tert-butyl ether - 573 25 500 ND 115 81-121 1 56 20 - <br /> tert-Amyl methyl ether - 519 25 500 'ND 104 82-140 3 97 20 - <br /> 1,2-Dichloroetbane 546 25 „" 500 ND 109 77-136 465 20 <br /> -1,2-Dibromoethane(EDB)--- --- — - -- 558- ___25_- _ - _ 500- , ND y 112 _ 77-132_ _1 07_ _ 20 <br /> Benzene 526 25 500 ND 105 69-124 0 380 20 <br /> Toluene 518 25 500 ND 104 78-129 5 08 20 <br /> Ethylbenzene 534 25 500 ND 107 84-132 3 04 20 <br /> Xylenes(total) 1650 25 1500 ND 110 83 137 3 08 20 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 14 of 18 <br />