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1895 <br /> Drive <br /> Sequoia nflil CA 5037 <br /> MorBaa 40 C7 95037 <br /> (408)776-96D0 <br /> FAX 308 <br /> iW Analytical wwseg oialab co <br /> www sequolaiabs corn <br /> URS Corporation[Arcot] Project ARCO#2186,Stockton,CA MOF0559 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Ntanber G09JZ-0164 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/27/05 16 38 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunit Units Level Result %REC Limits RPD Lurut Notes <br /> Batch 5F23012-EPA 5030B PIT 1 EPA 8260B <br /> Matrix Spike Dup(5F23012-MSD1) Source MOF0559-01 Prepared 06/23/05 Analyzed 06/24/05 <br /> Benzene 1000 50 ug/l 608 370 104 65-115 8 20 <br /> Ethylbenzene I170 50 784 390 99 75-135 8 15 <br /> Methyl tert-butyl ether 4090 50 960 3000 114 65-125 1 20 <br /> Toluene 3840 50 3290 30 116 85-120 7 20 <br /> Xylenes(total) 4950 50 3850 1300 95 85-125 7 20 <br /> Gasoline Range Organics(C4-C12) 55800 5000 44000 7500 110 70-124 9 20 <br /> Surrogate 11-Dichloraethane-d4 236 150 94 60-135 <br /> I <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 /> Page l l of 12 <br />