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• <br />' Entech Analytical Labs,Inc 525 Del Rey Avenue, Suite E <br /> Sunnyvale,CA 94086 <br />' QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Oras Chromatography <br /> QC Batch# GBG5980120 Date Analyzed 01/20/98 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units <br /> QC LMTS <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> li /L %R %R RPD 1 %R <br />' 'Benzene ' 8020 1 <0 50 1 10 0 1 ND 1 103 103 1 94 1 94 1 96 1 25 1 50-150 ' <br /> Toluenet <br /> 1 8020 I <0 50 i 100 1 ND 1 94 1 94 1 89 1 89 I 53 1 25 1 50-150 1 <br /> :Ethyl Benzene 8020 <0 50 1 100 1 ND 1 96 i 96 1 92 I 92 I 50 1 25 1 50-150 <br /> 'Xylenes I 8020 1 <0 50 1 30 1 ND 1 31 r 102 1 29 1 96 I 65 1 25 1 50-150 I <br /> Gasoline 8015 i <50 0 i 625 i ND 616 t 99 624 t 100 1 13 t 2550-150 1 <br /> I 1 l I I I I I E <br /> � i <br /> ' Definition 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 />