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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- Volatile Organics <br /> QC Batch# VOC2W980624 Date Analyzed 06/24/98 <br /> Matrix Water Quality Control Sample E 11587 <br /> Units ptpX <br /> 7 <br /> PARAMETER Method# :SA SR SP SP SPD SPDRPD QC LIMITS <br /> R %R RPD i %R <br /> iBenzene t 602 t 40 i ND 1 39 i 97 i 39 i 96 t 10 t 25 t 87-109 i <br /> t 39 t 9S i 40 i 99 i 18 t 25 i 77-120 i <br /> tChlorobenzene t 60I i 40 i ND i t r i i i i i <br /> X <br /> 1,1-Dichloroethane 601 40 ND 38 94 37 i 73-123 <br /> 92 2 4 i 25 i <br /> iToluene s 602 i 40 i ND t 39 i 98 t 39 i 96 i 15 i 25 i 86-110 <br /> Trichloroethene ll 601 1 40 i ND E 38 i 94 i 35 i 88 i 6 6 25 i 70-129 <br /> i t i r i i i i t t t i <br /> Note LCS and LCSD results reported for the following Parameters <br /> None <br /> . Acceptable Lf 5 and LCSD results are reported when matrix interferences cause MS and WM results to full outside <br /> established QC limits <br /> Definition of Terms <br /> na Not Analyzed in QC batch <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 Duplicate%Recovery <br /> NC Not Calculated <br />