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Entech Analytical Labs,Inc <br /> 525 Dal Rey Avenue,State E <br /> Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# 013G5970624 Date Analyzed 06/24/97 <br /> Matrix Water Quality Control Sample Blank Spike <br /> Units µg/L <br /> QC L <br /> ARA.METER Method# MB SA SR SP SP SPD SPD RPD (ADVISORY) <br /> lam P9/L lag/L P$2 %R µg/L %R RPD r %R <br /> (Benzene I 8020 r -<05 i 25 1 ND i 246 1 98 1 25 5 1 102 1 34 i 25 I 50-150 I <br /> I TolueneI I I I I 1 1 f I I I <br /> i 8020 I <0 5 I 25 I ND I 26 0 1 X04 I 27 S I 111 1 66 1 25 i 50-154 <br /> Ethyl Benzene I 8020 I <0 5 I 25 I ND I 23 9 1 96 I 248 1 99 I 38 I 25 I 50-150 I <br /> Xylenes r 8020 I <0 5 r 75 ND r 68 1 91 i 71 1 95 43 I 25 I 50-150 <br /> Gasoline E 8015 <50 0 625 ND 628 i 100 i 614 i 98 i 2325 i 25 I 50-150 I <br /> Definition of Terms <br /> na Not Analyzed in QC hatch <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 /> I <br /> 11 1 r <br /> E � 1 <br /> ! ! I <br /> I <br /> I <br /> 1 ! <br />