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r <br /> iEntech Analytical Labs,Inc 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# GBG4980826 Date Analyzed 08/26/98 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units u <br /> ARAMETER Method 9 MB SA SR SP SP SPD SPD RPD QC LMTS <br /> u u u u I RPD I %R <br /> 1Benzene 1 8020 1 <0 50 1 80 i ND 1 84 1 105 1 79 1 99 1 54 1 25 1 76-116 1 <br /> :Toluene 1 8020 : <0 50 i 80 I ND : 82 : 103 : 78 1 98 : 48 :: 25 75-116 : <br /> i [ I I I I r 1 I I l f i <br /> iEthyl Benzene 1 8020 f <050 i 80 1 ND i 84 r 104 ! 79 1 99 1 51 1 25 I1 77-116 I <br /> I E 1 <br /> :Xylenes 1 8020 1 <050 1 240 1 ND I 253 i 106 1 238 1 99 1 63 1 25 1 76-119 1 <br /> ,Gasoline i 8015 <50 0 1000 i ND 1110 i 111 ' 1170 i 117 i 53 25 i 63-136 <br /> Note LCS and LCSD results reported for the following Parameters <br /> All <br /> Acceptable LCS and LCSD results are reported when matrix interferences cause MS and,VSD results to fall outside <br /> 0stablished QC limits <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> MB Method Blank <br /> SA Spice 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 /> i <br />