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I <br /> ' Entech Analytical Labs,Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> I <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD: Gas Chromatography <br /> Laboratory Control Sample <br /> QC Batch#: GBG1991122 Date Analyzed: 11/22/99 <br /> Matrix: Soil Quality Control Sample: Blank Spike <br /> Units: 99(kg <br /> ARAMETER Method# MB SA SR SP SP SPD SPD I RPDQC LIMITS <br /> gg(kg gg/kg µg/kg %R I µ$/kg %R RPD %R <br /> 'Benzene i 20 I <5.0 6.6 ND I 7.5 I 114 17.5 114 1 0.0 1 25 70-130 <br /> ,Toluene 8020 ; <5.0 ; 29.0 ND ; 28 97 ; 28 96 1.1 25 ; 70-130 ; <br /> , <br /> !Ethyl Benzene 8020 1 <5.0 I 5.7 ND I 5.7 100 5.6 1 98 1.8 25 70-130 <br /> ' ;Xylenes 8020 1 <5.0 30.6 ND ; 32 10.3 31 102 1.6 25 70-130 <br /> 25 75-125 <br /> 8015 i <1000 ; 500 ND 478 % 477 i 95 0.2 <br /> Gasoline � `. <br /> ;aaa-TFT(S.S.)-PID 8020 100% 104% 103% 65-I35 <br /> ;aaa-TFT(S.S.)-FID 8015 96% 97% 97% 65-135 <br /> 1 <br /> �finition of Terms: <br /> na: Not Analyzed in QC batch <br /> MB: Method Blank <br /> SA: Spike Added <br /> SR: Sample Result <br /> RPD(%): Duplicate Analysis-Relative Percent Difference <br /> SP: Spike Result <br /> SP(%R): Spike%Recovery <br /> SPD: Spike Duplicate Result <br /> ' SPD(%R): Spike%Recovery <br /> NC: Not Calculated <br /> 1 <br />