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85 <br /> �,��, Sequoia MorganBHill CA 95037 <br /> �"t`� ) (408)776-9600 <br /> Analytical FAX(408)7826308 <br /> www sequotalabs com <br /> URS Corporation [Arcola Project ARCO#5469, Stockton,CA MOL0448 <br /> 2870 Gateway Oaks Dr, Ste 300 Project Ntunber GOBZP-0002 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 12/22/05 11 44 <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 5L20009-EPA 5030B P/T 1 EPA 82608 <br /> Blank(5L20009-BLK1) Prepared&Analyzed 12/20/05 <br /> tert-Amyl methyl ether ND 050 ug,9 <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 12-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 IC <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tent-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> We <br /> s(total) ND 050 <br /> the Range Organics(C4-C12) ND 50 <br /> Surrogate 12-Drchloroethane-d4 235 250 94 60-135 <br /> Laboratory Control Sample(5L20009-BS1) Prepared&Analyzed 12/20/05 <br /> Cert-Amyl methyl ether 145 050 ug/l 15 0 97 80-115 <br /> Benzene 554 050 5 16 107 65-115 <br /> tert-Butyl alcohol 131 20 143 92 75-150 <br /> Di-Isopropyl ether 181 050 151 120 75-125 <br /> 1 2-Dibromoethane(EDS) 154 0 50 149 103 85-120 <br /> 1,2-Dichloroethane 15 5 050 147 105 85-130 <br /> Ethanol 597 100 142 420 70-135 HL IC <br /> Ethyl tert-butyl ether 157 050 15 0 105 75-130 <br /> Ethylbenzene 749 050 7 54 99 75-135 <br /> Methyl tert-butyl ether 6 02 050 702 86 65-125 <br /> Toluene 399 050 372 107 85-120 <br /> Xylenes(total) 369 050 412 90 85-125 <br /> Gasoline Range Organics(C4-C12) 429 50 440 98 60-140 <br /> Surrogate 1,2-Dtchloroethane-d4 227 250 91 60-135 <br /> �uo1a Analytical- Morgan Hill The results to 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 weigh!basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 18 <br />