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URS Corporation[Arco l) PrI ARCO 46100 Tracey CA \I(?f $ <br /> 2870 Gateway Oaks Dr Ste 300 Project Number GOC1 Y-001 0 <br /> Sacramento CA 95833 Project Manager Jay Johnson l 1/2 lri t <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Mol gan Hill <br /> Rtpomn, Spike Source %REC RI 1) <br /> Analvie Result Limit Unns level Result %REC Limits RPD Luuil li <br /> Batch 5K22019-EPA 50351 EPA 8260B <br /> Matrix Spike(5K22019-MS11) Source MOK0899-01 Prepared Analyzed l 1/22/05 _ <br /> tert-Amyl methyl ether 0 0150 00050 mg/kg 00150 000014 99 80-130 <br /> BCn ,ne 000517 00050 000516 ND too 65-125 <br /> tert-Butyl alcohol 0 153 0 020 0 143 ND 107 80-135 <br /> Di-isopropyl ether o 0151 00050 00151 ND 100 85-115 <br /> 1 2-Dibromoethane(EDB) 0015.3 0 00>O 00149 ND 103 85-130 <br /> 1 2-Dlehl0r0eth'tne 00125 0 00]0 00147 ND 85 63-124 <br /> Ethznol 0 133 0 099 0 142 ND 94 35-150 <br /> Ethyl reit-butyl ether 00152 0 000 00150 ND 101 80-125 <br /> E(hylbenzene 000677 00050 000754 ND 90 80-]35 <br /> Methyl tert-butyl ether 0 00634 00050 000702 ND 90 75-]15 <br /> Toluene 00363 00050 00372 000019 97 85-125 <br /> ylenes(total) 00390 00050 00412 ND 95 80-140 <br /> isoline Range Organics(C4-C]2) 0 496 0 099 0 440 ND 113 53-126 <br /> Surrogate I2-Dlchlorocthanc.-d4 000352 000500 70 60-125 <br /> Matrix Spike Dup(5K22019-MSDI) Source MOK0899-01 _ Prepared 11/22/05 Analyzed 11/23/05 <br /> tert-Amyl methyl ether 00148 0 00 0 tng/k- 00150 0 00014 98 80-130 l <br /> Benzene 000503 00050 000516 ND 97 6]-125 3 70 <br /> tett-Butyl alcohol 0 146 0 020 0 143 ND 102 80-135 5 30 <br /> Di isopropyl ether 00149 0 00 0 0 O1 I ND 99 85-115 1 20 <br /> 1 2-Dibroinoethane(EDB) 00147 00050 0 Ot49 ND 99 85-130 4 1:) <br /> 2-Dichtoroethane 00122 00050 00147 ND 83 63-124 2 2:) <br /> Ethanol 0 109 0 099 0 142 ND 77 35-150 20 40 <br /> Ethyl tort-butvl ether 00150 00050 00150 ND 100 80-125 1 2> <br /> Ethvlbenzene 000659 00050 000754 ND 87 80-135 3 20 <br /> Methyl tert-butyl ether 000614 00050 000702 ND 87 75-115 3 ;� <br /> Toluene 00353 0 01 00372 000018 94 85-12D 3 1� <br /> XVlents(total) 00378 00050 00412 ND 92 80-1.10 3 20 <br /> Gasoline Range Organics(C4 C12) 0476 0 099 0 440 ND 108 53-126 4 <br /> Surrogale 12 Dicidoroe11nu7c dJ 000334 - 0005019 - �—-—6/ - -677 1 ) - - <br /> Sequoia Analytical - Morvan Hill The results 11711[1$report opplt to the sumplcz unalti_cd itr ac c ul t II n Y <br /> cu$fodti doCUMC nt L/nksa whern ise stated rc3ults ate reporled Stu r i.,7 I <br /> 0 Thi-I,arnak n(al report rna%t be reproduced to its enttreti <br /> � i 1 <br />