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� I <br /> l,1 <br /> Geocon Consultants,Inc. Project Number: Former Wards&Unocal,59482-06-02 <br /> 3160 Gold Valley Drive,Suite 800 <br /> ReportTo: Rebecca Silva ' <br /> Rancho Cordova,CA 95742 Reported: 01/27/2012 <br /> BTEX/MTBE by EPA 8021-Quality Control(cont'd) <br /> Rec RPD <br /> Result PQL Spike Source ' <br /> Analyte (ug/kg) (ug/kg) Level Result %Rec Limits RPD Limit Notes <br /> Batch B2A0671-GCVOAS(continued) <br /> LCS Dup(B2A0671-BSD2)-Continued <br /> Prepared: 1/26/2012 Analyzed:1/262012 <br /> o-Xylene 110 5.0 100 111 70-130 2.98 20 <br /> Surrrogate:4-Brromofluorobercene 100 T00 105 65-140 ' <br /> Matrix Spike(B2A0671-MS]) Source:1200273-01 Prepared: 126/2012Analyzed:126/2012 <br /> MTBE 310 5.0 429 ND 72.1 39-121 <br /> Benzene 56 5.0 40.8 ND 137 69-264 ' <br /> Toluene 170 5.0 202 2.7 83.7 44-150 <br /> Ethylbenzen72 5.0 76.0 20 67.7 37-161 <br /> m,p,Xylene 200 5.0 206 17 87.8 30-149 <br /> o-Xylene 68 5.0 73.5 2.0 90.3 31-166 ' <br /> Surrrogate:4-Bronmfluorobenzene 110 100 113 65-140 <br /> Matrix Spike Dup(B2A0671-MSIM Source:1200273-01 Prepared:1/26/2012 Analyzed:1/262012 <br /> MTBE 300 5.0 429 ND 71.1 39-121 1.49 20 ' <br /> Benzene 60 5.0 40.8 ND 148 69-264 7.98 20 <br /> Toluene 170 5.0 202 2.7 83.6 44-150 0.157 20 <br /> Ethylbenzenc 76 5.0 76.0 20 74.0 37-161 6.41 20m,p ' <br /> 200 5.0 206 17 89.2 30-149 1.50 20 <br /> o-X Xylene 68 5.0 73.5 2.0 89.8 31-166 0.547 20 <br /> -Xylene <br /> Surrogate:4-Brromoflumroben:ene ITO <br /> 100 114 65-140 <br /> I <br /> I <br /> I <br /> I <br /> 3275 Walnut Avenue,Signal Hill, CA 90755•Tel:562-989-4045 •Fax:562-989-4040 •3vwtv.at1global.00m Page 8 of 10 I <br />