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�� Sequoia 1455McDowellNorth Ste 4 <br /> ��►."� Pctalurna,CA 94954 <br /> (707)792 1865 <br /> �r Analytical FAX(707)7920342 <br /> www sequoialabs cam <br /> Secor-Rancho Cordova Proleci Arco Slte 4932,Stockton CA P411025 <br /> 3017 Ktlgare Road Suite 100 Project Number WR 63964 Reported <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky 01/04/05 1 1 35 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limas RPD Limit Notes <br /> Batch 4110095-EPA 5030B waters 1 EPA 8260B <br /> Matrix Spike(4110095-MSI) Source P411025-01 Prepared&Analyzed 11/03/04 <br /> Tert-amyl methyl ether 133 25 ugA 125 ND 106 78 117 <br /> Benzene 125 12 125 ND 100 81 118 <br /> Ten-butyl alcohol 2050 5o0 2500 ND 82 60 147 <br /> Dtisopropylether 122 25 125 ND 98 70-125 <br /> 12 Dibromoethane(EDB) 117 12 " 125 ND 94 85-125 <br /> 12 Dichloroethane 122 12 125 5 2 93 77-126 <br /> Ethanol 2400 2500 2500 ND 96 55 200 <br /> Ethylberizene 119 12 125 ND 95 89 122 <br /> Ethyl text butyl ether 128 25 L25 ND 102 71-120 <br /> Methyl tort butyl ether 769 12 1125 630 Ht t 70-122 <br /> Toluene 120 12 125 ND 96 84-119 <br /> • xylenes(total) 362 12 375 ND 97 86-132 <br /> Surrogate Dibromofluoromethane 547 Soo 109 84-121 <br /> Surrogate 12 Dichloroethane-d4 547 5 00 109 74-135 <br /> Surrogate Toluene-d8 593 500 119 84-119 <br /> Surrogate 4 Bromofluorobenzene 500 5 00 100 86-119 <br /> Matrix Spike Dup(4110095-MSDI) Source P411025-01 Prepared&Analyzed 11/03/04 <br /> Tett-amyl methyl ether 126 25 u9A 125 ND 101 78-117 5 20 <br /> Benzene 116 12 125 ND 93 81 Its 7 20 <br /> Tort butyl alcohol 1950 500 2500 ND 78 60-147 5 20 <br /> DL isopropyl ether 115 25 1 125 ND 92 70-125 6 20 <br /> 12 Dibromoethane(EDB) 113 12 125 ND 90 85-125 3 20 <br /> 1 2 Dichloroethane 116 12 125 5 2 89 77-126 5 20 <br /> Ethanol 2550 2500 2500 ND 102 55 200 6 20 <br /> Ethylbenzene 109 12 125 ND 87 89-122 9 20 LN <br /> Ethyl tert butyl ether 121 25 125 ND 97 71-120 6 20 <br /> Methyl tort butyl ether 742 12 125 630 90 70-122 4 20 <br /> Toluene 113 12 125 ND 90 84-119 6 20 <br /> Xylenes(total) 333 12 375 ND 89 86-132 8 20 <br /> Surrogate Dtbromofluoromethane 549 500 110 84-111 <br /> Surrogate 12 Dtchloroethane-d4 534 500 107 74-135 <br /> Surrogate Toluene-d8 383 500 117 84-119 <br /> Surrogate 4 Bromofluorobenzene 508 11 500 102 86-119 <br /> Sequoia Analytical-Petaluma The results in this reporrapply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weigh!basis <br /> 77ds analytical report must be reproduced in its entirety <br /> Page 8 of 9 <br />