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Drive <br /> �j1 • n HI Jarvis 5037 <br /> J�'� \ Sequoia MorganHtkl CA 95037 <br /> 1W Analytical (4018)776-9600 <br /> FAX(408)782 6308 <br /> www sequoialabs corn <br /> 0 <br /> URS Corporation(Arcol] Project ARCO#6020,Manteca,CA MOFOI50 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC1 V-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/20/05 13 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 Linut Notes <br /> Batch 5FO8009-EPA 5030B P/T 1 EPA 8260B <br /> Matrix Spike Dup(5F08009-MSD1) Source MOF0123-05 Prepared 06/08/05 Analyzed 06/10/05 <br /> Benzene 627 050 ug/l 608 ND 103 65-115 27 20 RB <br /> Ethylbenzene 871 0 50 784 ND 111 75-135 24 15 RB <br /> Methyl tert-butyl ether 943 050 9 60 ND 98 65-125 25 20 RB <br /> Toluene 413 050 329 ND 126 85-120 28 20 BA,LM <br /> Xylenes(total) 503 050 385 ND 131 85-125 24 20 BA,LM <br /> Gasoline Range Organics(C4-C 12) 439 50 440 ND 100 70-124 28 20 RB <br /> Surrogate 12-Dichloroethane-d4 3 78 500 76 60-135 <br /> i <br /> Sequoia Analyttcal-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 10 of I 1 <br />