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i <br /> 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# GBG5970521 Date Analyzed 05/21/97 <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 /> "g/L µg/L pig/L µg/L % R µg/L %R RPD i %R <br /> rBenzene i 8020 r <0 5 r 25 i 00 r 24 r 96 r 24 r 96 i 00 r 25 r 50-150 r <br /> 1Toluene 11 8020 i <0 5 25 0 0 25 100 24 i 96 1 4 1 1 25 i 50-150 <br /> Ethyl Benzene r 8020 i <05 r 25 r 00 24 r 96 i 24 i 96 r 00 r 25 r 50-150 <br /> r r r r r t r ► r r <br /> Xylenes r 8020 r <0 5 r 75 r 00 r 74 r 99 r 73 r 97 i 14 r 25 r 50-150 i <br /> 1 Gasoline i 8015 r <50 0 r 625 r 0 i 670 r 107 r 645 i 103 r 3 8 r 25 i 50-150 r r r i r i r r r r r i r <br /> Definition of Terris <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 /> SPO (%R) Spike % Recovery <br /> NC Not Calculated <br />