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Entech Analytical Labs,Inc 525 Del Rey Avenue,Suite E <br /> Stumyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> Volatile Organic Compounds <br /> Laboratory Control Sample <br /> QC Batch# WGCMS990922 Date analyzed 09/23/99 <br /> Matrix Water Spiked Sample Blank Spike <br /> Umts H$/I- <br /> PARAMETER Method# I SA SR 1 SP j SP SPD SPD r RPD <br /> iQC LIMITS <br /> �L <br /> u1;g/1 µSIL %R 119/1- %R RPD 1 %R <br /> 1,1-Dtehloreethene 1 8240/8260 25 ND 22 87 ' 1 2182 57 25 50-150 <br /> , <br /> ;Methyl-tert-butylethar 1 8240/8260 25 ND 29 1 116 1 27 1 109 61 25 50-150 1 <br /> Benzene i $240/8260 25 � ND 26 102 25 � 98 36 25 50-150 <br /> ITricliloroethene 8240/8260 25 ND 1 28 1 112 ; 27 109 <br /> 33 25 1 50-150 <br /> ;Toluene8240/8260 25 ND 26 104 25 102 19 25 150-150 <br /> lChlorobenzene ; 8240/8260 ; 25 ; ND ; 27 ; 108 ; 26 ; 105 2325 25 50-150 <br /> Surrogates <br /> Pbromofluoromethane 8240/8260 103% 110% 105% 65-135 l <br /> MTBE-d3 8240/8260 1 1 115°/a l 125% 120% iI <br /> 65-135 , <br /> 'Tolueno-d8 8240/8260 1 i 96% 1 105% 1 104% { ; ' <br /> 65-135 <br /> 14-13romofluorobenzene ; 8240/8260 ; 1 981/o 1. 1011 ; ; 106% ; ; 1 1 65-E35 1 <br /> Definition of Terms <br /> na Not Analyzed in QC hatch <br /> 10 <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 /> r <br /> r <br /> s <br />