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Entech Analytical Labs,Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> Laboratory Control Sample <br /> QC Batch# GBG4990810 Date Analyzed. 08/10/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units �tg/Liter <br /> PARAMETER Method# MB SA SR SP SP SPD SPD % QC LIMITS <br /> ug/Liter gg/Liter µg/Liter 4gfLiter % R gg/Ltter %R RPD RPD %R <br /> ;Benzene 8020 11 <0 50 40 j ND ; 38 94 ; 39 1 98 1 3 9 25 70-130 <br /> Toluene 8020 <0 50 40 ND 38 95 ; 41 103 76 25 ; 70-130 <br /> ;Ethyl Benzene 8020 <0 5040 ND 95 40 99 4 7 <br /> l 25 70-130 <br /> � � 38 � � � <br /> Xylenes 8020 <0 50 120 ND 115 95 1 120 100 1 4 9 25 1 70-130 <br /> ;Gasoline 8015 <50 0 500 ND 440 88 454 91 32 25 70-130 <br /> ;aaa-TFT(SS)-P!D 8020 93% 930, 95% 65-135 <br /> ;aaa-TFT(SS)-FID 8015 102% 97014 96% 65-135 <br /> Definition of Terms <br /> na Not Analyzea in QC batch <br /> 0 MB Method Blank <br /> SA Spike Added <br /> SR Sample Result <br /> RIP D(%) 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 />