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Y <br /> 1885 Jarvis Dnve <br /> (DFAX <br /> Morgan 40Hil77 45037 <br /> Sequoia (408)776 9600 <br /> (408)782 6308 <br /> 1WAnalytical www sequoLalabscc <br /> Project ARCO#6100,Trace CA MOF0491 <br /> URS Corporation[Arcot] � y' <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC IY-0003/7 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 06/17/05 16 37 <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 5F16009-EPA 5030B PIT/EPA 8260B <br /> Laboratory Control Sample Dup(5F16009-BSD2) Prepared&Analyzed 06/16/05 <br /> Benzene 566 0 50 mg/ml Air 608 93 65-115 5 20 <br /> Ethylbenzene 795 050 784 101 75-135 5 15 <br /> Methyl tert-butyl ether 856 050 960 89 65-125 2 20 <br /> Toluene 362 0 50 329 110 85-120 3 20 <br /> Xylenes(total) 44 1 050 38 5 115 85-125 2 20 <br /> Gasoline Range Organics(C4-C 12) 389 50 440 88 70-124 1 20 <br /> Surrogate 12-Dtchloroethane-d4 458 500 92 60-135 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed to 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 14 of 15 <br />