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4 �n�nDnFc <br /> KD- 1 4 N 71,2 6 09 <br /> URS Corporation[Arco II Project ARCO 96100,Tracey,CA MOKO1 82I <br /> Project Number GOC 1 Y-001 0 RC[)ON cul <br /> 2870 Gateway Oaks Dr Ste 300 J <br /> Sacramento CA,95833 Project Manager Jay Johnson 12/02/05 ]0 55 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reponin6 Spike Source %R£C RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lvrn Not— <br /> Batch <br /> fon ,Batch 5K21014-EPA 50351 EPA 8260B <br /> Blank(5K21014-BLKI) Prepared&Analyzed 11/21/05 <br /> tert-Amyl methyl ether ND 00050 mg/kg <br /> Benzene ND 00050 <br /> tert-Butyl alcohol ND 0 020 " <br /> Di-isopropyl ether ND 00050 <br /> ] 2-Dibromoethane(EDB) ND 00050 " <br /> 1 2-Dichloroethane ND 00050 <br /> Ethanol ND 0 to " <br /> Ethyl tert butyl ether ND 00050 <br /> Ethylbenzene ND 00050 " <br /> Methyl tert-butyl ether ND 00050 <br /> Toluene ND 00050 " <br /> Xylenes(total) ND 00050 <br /> " <br /> Xylenes <br /> Range Organics(C4-C12) ND 010 -- - <br /> Surrogate 12 Dichloroethane-d4 000433 000500 87 60-125 <br /> Laboratory Control Sample(5K21014-BSI) Prepared&Analyzed 11/21/05 <br /> tort-Amyl methyl ether 00161 00050 mg/kg 00150 107 80-130 <br /> Benzene 000530 00050 000516 103 65-125 <br /> cert-Butyl alcohol 0 157 0 020 0 143 110 80-165 <br /> Dt-isopropyl ether 0 0160 00050 00151 106 85-115 <br /> 1 2 Dibromoethane(EDB) 0 0165 00050 00149 1 1 1 85-130 <br /> 1,2 DILhloroethane 00138 00050 00147 94 63-124 <br /> Ethanol 0 152 0 10 0 142 107 35-150 <br /> Ethyl tert butyl ether 00163 00050 00150 109 80-125 <br /> Ethvlben=ne - 0 00730- 0 0050 0 00754— - - —9-7 80-135 - - - --- --- - <br /> Methyl tert-butyl ether 000703 00050 000702 loo 75-115 <br /> Toluene 00364 00050 00372 98 85-125 <br /> Xylenes(total) 0 0410 00050 00412 100 80-140 <br /> Gasoline Range Organu-s(C4-C 12) 0 542 0 10 0 440 123 53-126 <br /> Surrogate 12 Dichloroethane-d4 0 00351 000500 70 60-125 <br /> Sequoia Analytical - Mor-an Mill The resulls in this report apply to the samples analv`cd in accordance n uh the Chuan of <br /> custodv docuntuu Unless othenvise stated results are reported an a It c r It ci,hi In' i% <br /> . This anaillical report must be reproduced in its entirety <br /> P 1t'.L I I ()] 13 <br />