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885 Jarvis Drive <br /> Sequoia Morgan Hol! CA 95037 <br /> (408)776 9604 <br /> D 308 <br /> Analytical wwseUoialab com <br /> www sequoiala6s com <br /> i <br /> Project y, M010662 <br /> URS Corporation �Arcol) .] ARCO#f6100,Trace CA <br /> 2870 Gateway Oaks Dr, Ste 300 Project Number GOC 1 Y-0005 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 10/03/05 17 30 <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 5JO1004- EPA 5030B P/T/EPA 8260B <br /> Blank(5JO1004-BLKI) Prepared&Analyzed 10/01/05 <br /> tert-Amyl methyl ether ND 0 50 ugll <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1 2-Dibromoethane(EDB) ND 050 " <br /> 1 2-Dichlaroethane ND 050 <br /> Ethanol ND 100 " <br /> Ethyl tett-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl Cert-butyl ether ND 0 50 " <br /> Toluene ND 050 <br /> 0 es(total) ND 050 <br /> me Range Organics(C4-C12) ND 50 <br /> Surrogate 12-Dechloroethane-d4 245 250 98 60-135 <br /> Laboratory Control Sample(5JO1004-BSI) Prepared&Analyzed 10/01/05 <br /> ten-Amyl methyl ether 10 5 050 ugA 10 0 105 80-115 <br /> Benzene 112 050 10 0 112 65-115 <br /> tert-Butyl alcohol 47 1 20 500 94 75-150 <br /> Di-isopropyl ether 105 050 100 105 75-125 <br /> 1,2-Dibromoethane(EDB) 101 050 100 101 85-120 <br /> 1,2-Dichloroethane 11 1 050 100 111 85-130 <br /> Ethanol 197 100 200 98 70-135 <br /> Ethyl tert-butyl ether 10 1 0 50 10 0 101 75-130 <br /> Ethyibenzene 11 1 050 10 0 111 75-135 <br /> Methyl tert-butyl ether 10 1 050 10 0 101 65-125 <br /> Toluene 106 050 10 0 106 85-120 <br /> Xylenes(total) 358 050 300 119 85-125 <br /> Surrogate 1 2-Dichloroethane-d4 243 250 97 60-135 <br /> uola Analytical -Morgan Hill The results in this report apply to the samples analy-ed in accordance with the chain of <br /> custody document Unless otherwise staled results are reported on a wet weight bases <br /> This analytical report must be reproduced in its entirety <br /> Page 13 of 16 <br />