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Drive <br /> q 885 <br /> Sequoia Morgan Hill, <br /> CA CA950375037 <br /> (408)776-9600 <br /> FAX <br /> Analytical equo 08 <br /> labs c <br /> www squoiaabs corn <br /> URS Corporation[Arcot] Project ARCO#6020,Manteca,CA MOL0445 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC I V-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 12/29/05 17 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 %R-EC Limits RPD Limit Notes <br /> Batch SL21004-EPA 5030B P/T/EPA 8260B <br /> Blank(5L21004-BLKI) Prepared&Analyzed I2121/05 <br /> tert-Amyl methyl ether ND 050 ug/1 <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 50 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2 Dibromoethane(EDS) ND 050 <br /> 1,2 Drchloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert butyl ether ND 050 <br /> Toluene ND 050 " <br /> lencs(total) ND 050 <br /> asohne Range Organics(C4-C12) ND 50 <br /> Surrogate 1 2-Drchloroethane-d4 423 11500 85 60-135 <br /> Laboratory Control Sample(5L21004-BS1) Prepared&Analyzed 12121/05 <br /> tert-Amyl methyl ether 152 050 ug/l 150 101 80-115 <br /> Benzene 529 050 5 16 103 65-115 <br /> tcrt-Butyl alcohol 149 50 1143 104 75-150 <br /> Di isopropyl ether 167 050 " 151 111 75-125 <br /> 1,2 Dibromocthane(EDB) 170 050 14 9 114 85-120 <br /> 1 2-Drchloroethane 144 050 14 7 98 85-130 <br /> Ethanol 159 100 142 112 70-135 <br /> ;ethyl tert-butyl ether 151 050 150 101 75-130 <br /> Ethylbenzene 7 06 050 7 54 94 75-135 <br /> Methyl tert-butyl ether 696 050 " 702 99 65-125 <br /> Toluene 37 6 050 " 37 2 101 85-120 <br /> Xylenes(total) 396 050 " 41 2 96 85-125 <br /> Gasoline Range Organics(C4-C12) 378 50 440 86 60-140 <br /> Surrogate 1 2 Dichloroeihane-d4 452 500 90 60-135 <br /> Sequoia 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 weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 10 of 12 <br />