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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 # GBG5971021 Date Analyzed 10/21/97 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units jcg/L <br /> QC LIMITS <br /> FEER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> ug/L Mcg/L µg/l- Mcg/L % R pg/L %R RPD I %R <br /> iBenzene 1 8020 1 <0 50 1 50 I ND 1 40 i 80 1 47 1 93 1 147 1 25 1 50-150 <br /> i <br /> 4 6 93 4 7 1 1 E <br /> (Toluene 1 8020 c0 50 1 50 I ND i i 1 94 1 0 9 1 25 1 50-150 <br /> Ethyl Benzene I 8020 1I e0 50 1 50 I ND 1 46 1 92 I 46 I 92 1I 07 I 25 1 50-150 <br /> 1 1 I I I 1 I I I <br /> Xylenes E 8020 1 CO 50 1 15 I ND 1 15 1 100 1 15 i 99 1 0 7 1 25 I 50-150 <br /> Gasoline i 8015 j C50 0 j 625 j ND j 632 j 101 j 644 j 103 j 1 9 j 25 50-150 <br /> Defuution 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 />