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Drive <br /> } v� q IsJarvis <br /> Sequoia Ula Morgan Hill CA 950375037 <br /> (408)776 9600 <br /> Analytical www <br /> seq 8) labs82 cu 8 <br /> www sequoialabs cum <br /> URS Corporation[Arcol] Project ARCO#6100 Tracey CA M0140072 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOCI Y-0005 [reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 08/05/05 10 25 <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 5H03004-EPA 5030B P/T/EPA 8260B <br /> Laboratory Control Sample Dup(SH03004-BSD1) Prepared&Analyzed 08/03/05 <br /> tert-Amyl methyl ether 10 8 050 mg/m'Air 100 108 80-115 4 15 <br /> Benzene 112 0 50 10 0 112 65-115 6 20 <br /> tert-Butyl alcohol 48 3 20 500 97 75-150 0 2 25 <br /> Di-Isopropyl ether 103 050 10 0 103 75-125 7 15 <br /> Ethyl tert-butyl ether 105 050 100 105 75-130 6 25 <br /> Ethylbenzene 930 050 100 93 75-135 3 15 <br /> Methyl tert-butyl ether 11 0 050 100 110 65-125 2 20 <br /> Toluene 11 4 050 10 0 114 85-120 5 20 <br /> Xylenes(total) 272 050 300 91 85-125 2 20 <br /> Surrogate I 1-Dichloroethans-d4 245 250 98 60-135 <br /> Laboratory Control Sample Dup(5H03004-BSD2) Prepared&Analyzed 08/03/05 <br /> cnzcnc 6 19 050 mg/m'Air 6 08 102 65-115 7 20 <br /> thylbenzene 725 050 784 92 75-135 4 15 <br /> Methyl Cert-butyl ether 950 050 960 99 65-125 7 20 <br /> Toluene 376 0 50 329 114 85-120 3 20 <br /> Xylenes(total) 35 3 050 385 92 85-125 3 20 <br /> Gasoline Range Organics(C4-C12) 422 50 440 96 70-124 8 20 <br /> Surrogate 12-Dichloroethane-d4 237 250 95 60-135 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analy_ed in accordance with the chain of <br /> custody document Unless othertvtse stated results are reported on a ivet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 10 of 11 <br />