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1 <br /> Entech Anal?tical Labs, Inc 525 Del Rey Avenue, Suite E <br /> Sunnyvale,CA 940$6 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# GBG5970613 Date Analyzed 06/13/97 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units µ L <br /> I I QC LIMITS <br /> PARAMETER Method# MB I SA SR SP SP SPD SPD RPD (ADVISORY) <br /> µ L I p-/L_ L % R L %R I RPD I %R <br /> (Benzene I 8020 1 <0 5 1 25 1 0 0 i 21 3 ! 85 ! 221 1 88 1 3 7 ! 25 1 50-150 I <br /> ' I ! 1 I I I ! I I f I I I <br /> (Toluene ! 8020 I <0 5 I 25 i 0 0 263 101 ! 251 1 100 1 0 8 I 25 ! 50-150 I <br /> :Ethyl Benzene : 8020 : <0 5 : 25 1 0 0 : 25 4 : 102 : 25 2 !1 101 : 0 8 : 25 : 50-150 : <br /> I 1 I I I I I k I I I <br /> Xylenes I 8020 I <0 5 I 75 1 0 0 I 70 I 93 ! 68 1 91 I 2 9 I 25 ! 50-150 I <br /> Gasoline i 8015 i <50 0 , 625 i 0 i 596 95 i 600 i 96 i 0 7 25 i 50-150 <br /> ' Definition of Terms <br /> na Not Analyzed in QC batch <br /> MB Method Blank <br /> 1 SA Spike Added <br /> SR Sample Result <br /> RPD(%) Duplicate Analysis-Relative Percent Difference <br /> 1SP Spike Result <br /> SP(%R) Spike%Recovery <br /> SPD Spike Duplicate Result <br /> SPD(%R) Spike%Recovery <br /> ' NC Not Calculated <br /> i <br /> l <br />