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0 ntech Analytical Labs, Inc. 525 Dei 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#: SGC2000828 Date Analyzed: 08/28/00 <br /> Matrix: Soil Quality Control Sample: Blank Spike <br /> Units: µg/kg <br /> PARAMETER € Method# MB SA € SR SP SP SPD , SPD RPD QC LIMITS <br /> Iig kg `' µg/kg ug kg [ % R ug/kg %R RPD %R <br /> .Benzene 1 8020 <5.0 2.0 ND t 1.6 79 1 2.0 1 99 1 22.1 25 75-125 <br /> :Toluene 1 1 1 <br /> 1 8020 1 <5.0 28.2 1 ND 33 1 115 1 32 115 1 0.4 1 25 75-125 <br /> Ethyl Benzene 8020 <5.0 1 4.8 1 ND 3.7 1 77 3.7 77 1 1.1 1 25 75-125 <br /> ;Xylenes ; 8020 ; <5.0 32.1 ; ND 33 1 102 ; 33 ; 102 ; 0.3 ; 25 ; 75-125 <br /> !Gasoline ; 8015 ; <1000 468 ; ND 521 ; 111 518 ; 111 0.7 1 25 ; 75-125 <br /> ;aaa-TFT(S.S.)-P1D ; 8020 ; 118% 108% 107% 65-135 <br /> ;aaa-TFT(S.S.)-FID 8015 78% 78% 78% 65-135 <br /> Oefinition 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 />