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i <br /> 885 Jarvis Dr <br /> Sequoia Mcrgan Hill,CA 95037 <br /> Analytical (448)776-9600 <br /> FAX(408)782-6308 <br /> www sequoialabs can <br /> RS Corporation(lI Project ARCO#6020,Manteca,CA MMB0590 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number ARCO#6020,Manteca,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 03/05/03 09 36 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 31327005-EPA 5030B P/T <br /> Matrix Spike(3B27005-MS1) Source MMB0590-02 Prepared 02/27/03 Analyzed 02/28/03 <br /> Methyl tert-butyl ether 1230 50 ug/1 904 340 985 0-200 <br /> Benzene 591 50 544 ND 109 78-124 <br /> Toluene 3580 50 3280 ND <br /> 109 7$-129 <br /> Gasoline Range Organics(C6-C10) 48400 5000 44000 ND 110 70-113 <br /> Surrogate 12 Dichloroethane-d4 548 500 110 78-129 <br /> Matrix Spike Dup(3B27005-MSD]) Source MMB0590-02 Prepared 02/27/03 Analyzed 02/28/03 <br /> Methyl tert-butyl ether 1270 50 ug/I 904 340 103 0-200 320 200 <br /> Benzene 594 50 544 ND 109 78-124 0 506 12 <br /> Toluene 3630 50 3280 ND 111 78-129 139 10 <br /> Gasoline Range Organics(C6-C10) 47500 5000 44000 ND 108 70-113 1 88 9 <br /> rrogate 12-Dichloroethane-d4 54.9 500 110 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 /> is This analytical report must be reproduced in its entirety <br /> 7 of 8 <br />