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r <br /> ( Entech Analytical Labs, Inc 525 Del Rey Avenue, Suite E <br /> Sunnyvale, CA 94056 <br /> QUALITY CONTROL RESULTS Si11V1M,�1tY ' <br /> METHOD Gas Chromatography <br /> QC Batch# GBG5970519 Date Analyzed 05/19/97 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units µg/L <br /> ' QC LIMITS <br /> PARAMETER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> peg/L ug[L ug/L Ag/L % R Ag/L %R RPD i %R <br /> Benzene r 8020 r <05 i 25 r 00 r 28 r 112 i 25 i 100 i 113 r 25 i 50-150 i <br /> ' :Toluene 8020 i <0 5 25 11 00 26 104 26 i 104 : 00 i 25 50-150 <br /> Ethyl Benzene i 8020 <05 r <br /> 5 r 00 25 100 25 <br /> 50-1501 1 1 <br /> Xylenes 8020 <0S 75 r <br /> 0 0 i 77 i 103 i 76 i 101 i 1 3 i 25 i 50-150 <br /> r' Gasoline r 8015 i <50 0 625 r 0 i 661 i 106 r 656 r 105 r 0 8 i 25 r 50-150 r r r i i r i i r r r i r <br /> 1 <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 /> 1 <br /> r <br /> I <br /> r <br />