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r <br /> Entech An ilytical Labs, Inc 525 Del Rey A,.enue, Suite E <br /> • Sunnyvale, CA 93086 <br /> rQUALITY CONTROL RrSULTS SUMMARY <br /> ' METHOD Gas Chromatography <br /> QC Batch # GBG5971210 Date Analvzed 12/10/97 <br /> ' Matnx Water Qualm Control Sample Blank Spite <br /> Units gg/L <br /> QC LIMITS <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> ug/L gg/L gg/L gg/L % R gg/L %R RPD I %R <br /> (Benzene 1 8020 1 <0 50 1 100 1 ND 1 97 1 97 1 105 1 105 1 80 1 25 1 50-150 1 <br /> :Toluene : 8020 : <0 50 : 10 0 : ND : 103 1 103 : 101 : 101 : 27 : 25 : 50-150 <br /> � I I I I I 1 1 I 1 1 I I <br /> rEthyl Benzene i 8020 i <0 50 i 100 i ND 99 99 94 i 94 5 1 i 25 E 50-150 <br /> :Xylenes 1 8020 t <0 50 1 30 I ND 1 29 1 97 1 27 I 92 1 5 7 I 25 1 50-150 1 <br /> EGasoline j 8015 j <50 0 j 625 j ND j 599 j 96 j 59295 : 1 2 : 25 : 50-150 <br /> I 1 I 1 I <br /> 1 <br /> 1 <br /> yDefinition of Terms <br /> na Not Analyzed in QC batch <br /> ' MB Method Blank <br /> SA Spike Added <br /> SR Sample Result <br /> ' RPD(%) Duplicate Analysts -Relative Percent Difference <br /> SP Spike Result <br /> SP (%R) Spike % Recovery <br /> SPD Spike Duplicate Result <br /> ' SPD (`7oR) Spike % Recovery <br /> NC Not Calculated <br /> r <br /> r <br /> r <br /> 1 <br /> 1 <br />