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Geocon Consultants,Inc. Project Number: Former Wards and Unocal,S9482-06-02 , <br /> 3160 Gold Valley Drive,Suite 800 ReportTo: Iosh Ewert <br /> Rancho Cordova,CA 95742 <br /> Reported: 01/23/2012 <br /> BTEX/MTBE by EPA 8021-Quality Control ' <br /> Result PQL Spike Source %Ree RPD ' <br /> Analyte (ug/kg) (ug/kg) Level Result %Ree Limits RPD Limit Notes <br /> Batch B2A0518-GCVOAS ' <br /> Blank(B2A0518-BLKI) Prepared:1/20/2012 Analyzed:1/20/2012 <br /> MTBE ND 5.0 NR <br /> Benzene <br /> ND 5.0 NR ' <br /> NR <br /> Toluene ND 5.0 <br /> 0 NR 5. <br /> E[hylbenzene ND NR <br /> m,p-Xylene ND 5.0 <br /> o-Xylene <br /> ND 5.0 NR , <br /> Surrogate:4-BromoJluoroberuene <br /> 85 100 85.2 65-140 <br /> LCS(WA0518-BS2) Prepared: 120/2012 Analyzed: 12012012 <br /> MTBE 87 5.0 100 87.1 70-130 ' <br /> Benzene 97 5.0 100 96.7 70-130 <br /> Toluene 97 5.0 100 97.4 70-130 <br /> Ethylbenzene 95 5.0 100 94.9 70-130 <br /> m,p-Xylene 190 5.0 200 96.2 70-130 ' <br /> o-Xylene 97 5.0 100 97.3 70-130 <br /> Surrogate:4-BwmoJluomhenzene <br /> 84 100 84.0 65-140 <br /> LCS Dup(B2A0518-13SD2) Prepared:1/20/2012 Analyzed 1/202012 ' <br /> MTBE 98 5.0 100 98.0 70-130 11.7 20 <br /> Benzene 99 5.0 100 99.0 70-130 2.42 20 <br /> 99 5.0 100 99.2 70-130 1.80 20 <br /> Toluene ' <br /> ToluenEthylbenzene 96 5.0 100 96.2 70-130 1.27 20 <br /> 190 5.0 200 97.3 70-130 1.21 20 <br /> m,p-Xylene 99 5.0 100 98,7 70-130 1.50 20 <br /> o-Xylene <br /> !00 90.9 65-140 <br /> Surrogate:4-Bromq fiuowbenzen e <br /> 91 ' <br /> Duplicate(B2A0518-DUPI) Source:1200221-02 Prepared:1/20/2012 Analyzed:t20/2012 <br /> ND NR 20 ' <br /> MTBE ND 50ND NR 20 <br /> Benzene 'ND 50 ND NR 20 <br /> Toluene 5.0 ND NR 20 <br /> Ethylbenzene ND 5.0 <br /> ND 5.0 20 <br /> ND NR 1 <br /> m,p-Xylene 20 <br /> o-Xylene <br /> ND 5.0 ND NR <br /> Surrogate:4-Bromofluorobenzene <br /> 88 100 87.8 65-140 <br /> Matrix Spike(BZA0518-MS1) Source:1200135-07RE1 Prepared:1/202012 Analyzed:1/202012 ' <br /> MTBE 380 5.0 430 ND 89.4 39-121 <br /> Benzene 29 5.0 40.8 ND 70.6 69-264 <br /> Toluene 170 5.0 202 ND 83.6 44-150 I <br /> 5.0 76.0 ND 73.3 37-161 <br /> 56 <br /> Ethylbenzene 56 5 0 6.0 ND 95.6 30-149 <br /> ,,p-Xylene <br /> 3275 WahiutAnenue,Signal Hill, CA 90755 0 Tel: 562-989-4045 •Fax.-562-989-4040 •www.atlglobaGcont Page 7 of 11 I <br />