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t � <br /> Analytical hy , <br /> URS Corporation�ArcoII Project ARCO#6100 Tracey,CA <br /> 2870 Gateway Oaks Dr,Ste 300 Praject Number GOC 1 Y-0010 <br /> Sacramento CA 95833 Project Manager Jay Johnson <br /> Volatile 01 ganic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Repotting Spike Source %REC L11) <br /> Analyte Result Linut Units Level Result °/nREC Limits RPD 1 ni 1 <br /> BAW] 5K22019-EPA 50351 EPA 8260B <br /> Blank(5K22019-BLKI) Prepared&Analyzed 1 1/29/05 <br /> Cert-Amyl methyl ether ND 00050 ing/kg <br /> Benzene ND 00050 <br /> tert-Butyl alcohol ND 0 020 <br /> Di-isopropyl ether ND 00050 <br /> 1 2-Dibrotnoethane(EDB) ND 00050 <br /> 1 2-Dichloroethane ND 00050 <br /> Ethanol ND 010 <br /> Ethyl telt-butyl ether ND 0 000 <br /> Ethylbenzene ND 00050 " <br /> Methyl tert-butyl ether ND 0 0050 <br /> Toluene ND 00050 <br /> Ienes(total) ND 00050 <br /> soline Range Organics(C4-C 12) ND 0 10 <br /> Surrogate l 2-Drchlor0i.thane-d9 000368 0 00500 74 60-125 <br /> La bora toiy Control Sample(5K22019-BSI) Prepared&Analyzed 11/22/05 <br /> tLrt-Amyl methyl ether 00163 00050 mg/kg 00150 109 80-130 <br /> Benzene 000519 00050 000516 101 65-125 <br /> tert Btstyl-IIcOhol 0 158 0 020 0 143 l 10 80-165 <br /> Di-isopropyl ether 0 0160 00050 00151 106 85-115 <br /> 1 2-Dibromocthane(EDB) 00166 00050 00149 1 1 1 85 130 <br /> 1 2-Dichloroethane 00171 0 0050 00147 116 63-124 <br /> Ethanol 0146 O IO 0142 103 35-150 <br /> Ethvl tert-butyl ether 00162 0 00DO 0015G 108 80-125 <br /> Ethylbenzene 000662 00050 000754 88 80-135 <br /> Methyl tert-butvl ether 000803 00050 000702 114 75-115 <br /> Toluene 00345 0 000 00373 93 85-125 <br /> hvlenes(total) 00380 00050 0 0412 92 80-140 <br /> Gasoline Range Organics(C4C12) 0520 010 0440 1i 53-126 <br /> Sfrrrogalc 12-Drddoroethane-cN --- 000453 - — - - - 0 00.)of) - -— 91 60 125 <br /> Sequoia Analytical -Morgan Hill The msuIrs m this report apph to the samphs ancrh_cd m aeeoiChIML ILJ h <br /> cusloth,docuuruu Unlcsl Wht m isc stated resulrs are rcpui lc rl ern a a ci <br /> . This analt tical report must be mproduccd in us enrtron <br />