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%�Emeth Anaiyhcal Labs,Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> ' QUALITY CONTROL RESULTS SUMMARY <br /> ' METHOD Gas Chromatography <br /> QC Batch# GBG4980831 Date Analyzed 08/31/98 <br /> ' Matrix Water Quality Control Sample Blank Spike <br /> Units UgIL <br /> E"AMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> u %R1 %R RPD i %R <br /> :Benzene 8020 i <0 50 1 80 i ND i 82 1 102 i 77 % i 66 25 1 76-116 i <br /> ' :Toluene 8020 : <0 50 : 80 : ND 83 103 : 78 : 97 : 63 25 : 75-116 <br /> ,Ethyl Benzene 8020 <0 50 80 ND 82 102 77 97 60 25 76-116 i <br /> :xylenes 8020 i <0 50 i 240 i ND 253 106 i 233 i 97 i 86 25 i 76-119 i <br /> iGasolme i 8015 i <50 0 i 1000 i ND t 1160 116 i 1210 i 121 i 42 25 i 63-136 <br /> Note LCS and LCSD results reported for the following Parameters <br /> ' Al! <br /> cceptable LCS and LCSD results are reported when matrix interferences cause MS and MSD results to fall outside <br /> fgWestablished QC limits <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 />