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Entech Analytical Labs, Inc 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> r^ <br /> METHOD Gas Chromatography <br /> QC Batch# GBG2990309 Date Analyzed 03/09/99 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units pg/L <br /> PARAMETER Method# : MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> !Lg/L Vg/L V9/L u� % R 1191I. %R RPD 1 %R <br /> ,,Benzene 8020 <0 50 40 I ND 41 1 103 1 42 1 105 1 2 3 1 25 1 81-117 I <br /> t t t t t t t t t <br /> t r t t t e t t t s t <br /> ,,Toluene 8020 <0 50 ,, 40 1 ND 41 ,, 103 ,, 42 11 105 25 ,, 25 82-116 <br /> t t x t r t t r t t t t <br /> 'Ethyl Benzene 8020 1 <0 50 ,, 40 ND 1 41 1 104 42 106 1 24 1 25 1 83-116 1 <br /> t t t t t t t r t t <br /> ' 8020 i <0 50 1 120 1 ND i 122 i 102 126 1 105 1 32 25 1 83-117 1 <br /> 'Xylenes i t t t t x e t t t <br />' ,,Gasoline ,, 8015 ,, <50 0 ,, 500 ND ,, 504 ,, 102 477 95 56 ,, 25 ,, 78-119 ; <br /> Note LCS and LCSD results reported for the following Parameters <br /> All <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 /> • <br /> 1 <br />