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A <br /> 1 /� <br /> Geocon Consultants,Inc. Project Number: Former Wards&Unocal,S9482-06-02 <br /> ' 3160 Gold Valley Drive,Suite 800 Report To: Rebecca Silva <br /> Rancho Cordova,CA 95742 Reported: 01/27/2012 <br /> BTEX/MTBE by EPA 8021-Quality Control <br /> Result PQL Spike Source %Rec RPD <br /> ' Analyte (ug/kg) (ug/kg) Level Result %Rec Limits RPD Limit Notes <br /> Batch B2A0671-GCVOAS <br /> ' Blank(B2A0671-BLKI) Prepared:1/26/2012 Analyzed:126/2012 <br /> MTBE ND 5.0 NR <br /> Benzene ND 5.0 NR <br /> ' Toluene ND 5.0 NR <br /> Ethylbenzene ND 5.0 NR <br /> m,p-Xylene ND 5.0 NR <br /> ' <br /> 0-Xylene ND 5.0 NR <br /> Surrogate:4-Brontofluombenzene 100 100 102 65-140 <br /> LCS(B2A0671-BS1) Prepared:1/26/2012 Analyzed:1/262012 <br /> ' MTBE 430 5.0 429 100 70-130 <br /> Benzene 35 5.0 40.8 85.8 70-130 <br /> Toluene 180 5.0 202 87.8 70-130 <br /> Ethylbenzene 55 5.0 76.0 72.1 70-130 <br /> ' m,p-Xylene 190 5.0 206 92.1 70-130 <br /> o-Xylene 72 5.0 73.5 97.6 70-130 <br /> Smrogare:4-Bromofluorobenzene 110 100 109 65-140 <br /> ' LCS(B2A0671-BS2) Prepared:1/262012 Analyzed:1/262012 <br /> MTBE 120 5.0 100 121 70-130 <br /> Benzene 110 5.0 100 113 70-130 <br /> ' Toluene 110 5.0 100 114 70-130 <br /> Ethylbenzene 110 5,0 100 112 70-130 <br /> m,p-Xylene 230 5.0 200 113 70-130 <br /> o-Xylene 110 5.0 100 114 70-130 <br /> ' Surrogate.4-Brontofluawbenzene 110 100 111 65-140 <br /> LCS Dup(B2A0671-BSD1) Prepared: 1/26/2012 Analyzed:126/2012 <br /> MTBE 390 5.0 429 92.0 70-130 8.40 20 <br /> ' Benzene 35 5.0 40.8 86.9 70-130 1.27 20 <br /> Toluene ISO 5.0 202 88.2 70-130 0.376 20 <br /> Ethylbenzene 55 5.0 76.0 72.5 70-130 0.542 20 <br /> m,p-Xylene 190 5.0 206 92.1 70-130 0.0494 20 <br /> o-Xylene 71 5.0 73.5 96.4 70-130 1.26 20 <br /> Surrogate:4-Bronrofluombenzene 100 100 104 65-140 <br /> LCS Dup(B2A0671-BSD2) Prepared:1/26/2012 Analyzed:1/26/2012 <br /> MTBE 120 5.0 100 116 70-130 4.83 20 <br /> Benzene 110 5.0 100 108 70-130 4.63 20 <br /> Toluene 110 5.0 100 110 70-130 3.80 20 <br />' Ethylbenzene 110 5.0 100 108 70-130 3.50 20 <br /> m,p-Xylene 220 5.0 200 109 70-130 3.08 20 <br /> 3275 Walnut Avenue,Signal Hill, CA 90755•Tel:562-989-4045 •Fax:562-9894040 •wn,mallglobahcom Page 7 of 10 <br />