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Entech Analytical Labs Inc. 525 Del Re Avenue Suite E <br /> Y Y , <br /> Sunnyvale,CA 94086 j <br /> QUALITY CONTROL RESULTS SUMMARY <br /> METHOD: Gas Chromatography <br /> QC Batch#: GBG4970723 Date Analyzed: 07/23/97 <br /> Matrix: Soil Quality Control Sample: D11684 <br /> Units: ug/kg <br /> QC.LIMITS <br /> PARAMETER Method# MB SA SR 1 SP SP SPD SPD RPD (ADVISORY) <br /> ug/kg ug/kg ug/kg 1 ug/kg % R u %R RPD %R <br /> iBenzene i 8020 i <5.0 1 80 1 ND 1 105 1 132 i 103 1 129 1 1.9 1 25 50-150 i. <br /> :Toluene I 8020 I <5.0 1 80 i ND i 105 I 131 1 102 I 127 I 3.1 1 25 , I 50-150 ! <br /> Ethyl Benzene 1 8020 1 <5.0 i 80 I ND 1 103 I 129 1 102 I 128 I 0.5 1 25 50-150 I <br /> I I I I I I I I I I I E <br /> Xylenes 1 8020 I <5.0 1 240 I ND i 309 I 129 i 302 I .126 I 2.6 i 25 50-150 1 <br /> Gasoline i 8015 i <1000.00 I 1 1000 1 ND i 930 I 93 i 900 90 I -33 i 25 50-150 1 <br /> Note: LCS and LCSD results reported for the following Parameters: <br /> None <br /> Acceptable LCS and LCSD results are reported when matrix interferences cause WS and MSD results to fall outside t <br /> established QC limits. <br /> I <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 /> t <br />