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q6 Entech 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# GBG2981215 Date Analyzed 12/15/9$ <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units Ag(L . <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> pg/L µ1;lL µ� •, -99/L—: %R µg(L %R ; RPD %R <br /> Benzene 1 8020 <0 50 40 I ND =' 39 1 97 1 37 91 55 25 i 76-113 1 <br /> a <br /> ;Toluene ; 8020 ; <0 50 ; 40 ; ND ; 39 ; 98 37 ; 94 ; 47 ; 25 ; 77-112 ; <br /> ;Ethyl Benzene 8020 <0 50 1 40 1 ND 40 100 38 95 44 25 1 76-114 <br /> 1'Xylenes 8020 <0 50 120 ND 121 1 101 115 96 45 1 25 78-115 <br /> ;Gasoline 8015 <50 0 500 ND 450 90 ` 422 ` 84 65 25 71-114 ` <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, ISD results to fall outside <br /> established 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 Analysts-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 /> �f <br /> S <br />