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rit <br /> a <br /> .i� 885 jatvts Dr <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> Imo► Analytical FAX(408) Labsc 08 <br /> www sequoralabscom <br /> Secor-Rancho Cordova Project ARCO#595,Stockton,CA MMD0354 <br /> 3017 Kilgore Rd Suite 100 Project Number 26204 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/23/03 09 30 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3D18001 -EPA 5030B P/T <br /> Laboratory Control Sample(3D18001-BSI) Prepared&Analyzed 04/18/03 <br /> Methyl tert-butyl ether 948 050 119/1 100 948 63-137 <br /> Benzene 973 050 100 973 78-124 <br /> Toluene 105 050 100 105 78-129 <br /> Surrogate 1 2-Dichloroethane-d4 5 10 5 00 102 78-129 <br /> Laboratory Control Sample(3D18001-BS2) Prepared&Analyzed 04/18/03 <br /> Methyl tert-butyl ether 846 050 119/1 9 04 93 6 63-137 <br /> Benzene 544 0 50 5 44 100 78-124 <br /> Toluene 35 3 050 328 108 78-129 <br /> Gasoline Range Organics(C6-C 10) 422 50 440 95 9 70-113 <br /> Surrogate 1 2-Dichloroethane-d4 5 12 500 102 78-129 <br /> 10 <br /> Matrix Spike(3D18001-MSl) Source MMD0273-02 Prepared&Analyzed 04/18/03 <br /> Methyl tert butyl ether 685 5 0 ug/l 90 4 590 105 63-137 <br /> Benzene 526 50 544 ND 96 7 78-124 <br /> Toluene 321 5 0 328 ND 97 9 78-129 <br /> Gasoline Range Organics(C6-C10) 4580 500 4400 580 909 70-113 <br /> Surrogate 1 2-Dichloroethane-d4 545 500 109 78-129 <br /> Matrix Spike Dup(3D18001-MSDI) Source MMD0273-02 Prepared&Analyzed 04/18/03 <br /> Methyl tent-butyl ether 629 50 ug/I 904 590 43 1 63-137 852 13 QM-4X <br /> Benzene 526 50 544 ND 967 78-124 000 12 <br /> Toluene 333 5 0 328 ND 102 78-129 367 10 <br /> Gasoline Range Organics(C6-CIO) 4630 500 4400 580 920 70-113 1 09 9 <br /> Surrogate 1,2-Dichloroethane-d4 528 500 106 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 /> 15 of 16 <br />