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+1 <br /> 885 Jarvis Drive <br /> qllUla Morgan Hill CA 95037 <br /> (408)776-9600 <br /> FAX 2-6308 <br /> Analytical wwscq 8)7absco <br /> www se[luotala6s coni <br /> 0 <br /> URS Corporation[Arcot) Project ARCO#0760,Lodi,CA MPA 1406 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC8R-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/10/06 16 30 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source m/REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limn Notes <br /> Batch 6BO6031 -EPA 5030B P/T/EPA 8260B <br /> Matrix Spike(6B06031-MSI) Source MPA1366-01 Prepared&Analyzed 02/06/06 <br /> tert-Amy]methyl ether 168 050 ugll 163 ND 103 80-115 <br /> Benzene 492 050 504 ND 98 65-115 <br /> tert-Butyl alcohol 150 20 169 ND 89 75-120 <br /> Di-isopropyl ether 161 050 162 ND 99 75-125 <br /> 1,2-Dibromoethane(EDB) 166 050 166 ND 100 85-120 <br /> 1,2-Dichloroethane 153 050 155 ND 99 85-130 <br /> Ethanol 163 300 165 ND 99 70-135 <br /> Ethyl tert-butyl ether 15 8 050 164 ND 96 75-130 <br /> Ethylbenzene 648 050 728 ND 89 75-135 <br /> Methyl Cert-butyl ether 723 050 7 84 ND 92 65-125 <br /> Toluene 41 0 050 380 014 108 85-120 <br /> Xylenes(total) 402 050 408 ND 99 85-125 <br /> i <br /> Aft <br /> asolme Range Organics(C4-C12) 447 50 440 59 88 60-140 <br /> Surrogate 12-Dichloroethane-d4 470 500 94 60-135 <br /> 1 � <br /> Matrix Spike Dup(6B06031-MSDI) Source MPA1366-01 Prepared 02/06/06 Analyzed 02/07/06 <br /> tent Amyl methyl ether 167 050 ugll 163 ND 102 80 115 06 15 <br /> Benzene 493 050 5 04 ND 98 65-115 0 2 20 <br /> Cert Butyl alcohol 154 20 169 ND 91 75-120 3 25 - <br /> Di isopropyl ether 16 4 050 16 2 ND 101 75-125 2 15 <br /> I,2-Dibromoethane(CDB) 161 050 166 ND 97 85-120 3 15 <br /> 1,2-Dichloroethane 146 050 155 ND 94 85-130 5 20 - _- <br /> Ethanol 173 300 165 ND 105 70-135 6 35 <br /> Ethyl tent-butyl ether 15 8 050 164 ND 96 75-130 0 25 <br /> Ethylbcnzene 632 050 728 ND 87 75-135 2 15 <br /> Methyl tett butyl ether 7 54 050 7 84 ND 96 65-125 4 20 <br /> Toluene 404 050 38 0 0 14 106 85-120 1 20 <br /> Xylenes(total) 399 050 409 ND 98 85 125 0 7 20 <br /> Gasoline Range Organics(C4-C 12) 430 50 440 59 84 60-140 4 25 <br /> Surrogate 12-Drchloroethane-d4 4 66 500 93 60-135 <br /> Sequoia 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 he reproduced to as entirety <br /> Page 7 of 8 <br />