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Drive <br /> 8Hi Jarvis <br /> Sequoia MorganHill CA 950375037 <br /> (408)776 9600 <br /> Analytical wwwwwsegeq8)7826308 <br /> uoialabs com <br /> URS Corporation(Arcola Project ARCO#5469,Stockton,CA M000479 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G09JZ-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/07/05 t2 53 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lmut Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5C25006-EPA 5030B P/T/EPA 8260B <br /> Blank(5C25006-BLKI) Prepared&Analyzed 03/25/05 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 <br /> 1,2-Dichloroethane ND 0 50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether ND 0 50 <br /> Toluene ND 0 50 " <br /> es(total) ND 0 50 <br /> ine Range Organics(C4-C 12) ND A " <br /> Surrogate 12-Dichloroethane-d4 560 500 112 60-135 <br /> Laboratory Control Sample(5C25006-BSI) Prepared&Analyzed 03/25/05 <br /> tert-Amyl methyl ether 10 4 050 ugll 100 104 80-115 <br /> Benzene 944 0 50 100 94 65-115 <br /> tert-Butyl alcohol 51 5 20 500 103 75-150 <br /> Di-isopropyl ether 10 7 050 100 107 75-125 <br /> 1,2-Dibromoethane(EDB) 934 050 100 93 85-120 <br /> 1,2-Dichloroethane 113 050 100 113 85-130 <br /> Ethanol 184 100 200 92 70-135 <br /> Ethyl tert-butyl ether 10 8 050 100 108 75-130 <br /> Ethylbenzene 943 050 100 94 75-135 <br /> Methyl tert-butyl ether 10 6 0 50 100 106 65-125 <br /> Toluene 929 0 50 100 93 85-120 <br /> Xylenes(total) 30 2 0 50 300 101 85-125 <br /> Surrogate 12-Dichloroethane-d4 535 500 107 60-135 <br /> uoia 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 17 of 30 <br />