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t� <br /> Entech Analytical Labs,Inc. 525 Del Rey Avenue,Suite E <br /> • Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> Volatile Organic Compounds <br /> Laboratory Control Sample <br /> QC Batch#: WGCMS990726 Date analyzed: 07/26/99 <br /> Matrix: Water Spiked Sample: Blank Spike <br /> Units: 119/1- <br /> PARAMETER <br /> lyPARAMETER Method# SA SR SP SP i SPD SPD RPD QC LIMITS <br /> i <br /> 991L i llg/l µg/L E %R i µg/L %R i RPD ; %R <br /> 11,1-Dichloroethene 82,4018260 I 25 I ND 24 94 24 94 1 0.0 25 50-150 1 <br /> 1 <br /> 1 I 1 1 1 1 1 1 1 1 1 1 <br /> ;Methyl-tert-butyl ether 8240/8260 25 ND 31 123 27 108 13.1 25 50-150 ; <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> ;Benzene 8240/8260 25 ND 27 107 26 104 3.0 25 50-150 <br /> 1 1 1 1 1 1 1 1 l 1 1 1 <br /> Trichloroethene 8240/8260 25 ND 27 1 107 26 105 2.3 25 1 50-150 ; <br /> 1 i 1 1 1 1 1 1 1 1 1 1 <br /> Toluene 8240/8260 , 25 , ND 1 27 108 , 27 1 107 1 0.7 1 25 , 50-150 <br /> IChlorobenzene 1 8240/8260 25 1 ND I 27 I 108 1 27 I 108 I 0.0 I 25 I 50-150 <br /> 1 1 ! 1 1 1 1 1 I 1 1 1 <br /> ISu1 �gaces <br /> 1 1 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> IDibromofluor+omethane 8240/8260 114% 1 113% 1 102% ; 65-135 ; <br /> i 1 1 I 1 1 1 k I 1 1 1 <br /> ,MTBE-d3 , 8240/8260 , 92% , 110% , 108% 1 , , 65-135 <br /> 1 k 1 1 I 1 41 <br /> ,Toluene-d8 , 8240/8260 1 101% 1 102% , 105% , , , 65-135 <br /> s4-Bromofluombenzene 1 8240/8260 1 91% j 92% j ; 95% ; ; 65-135 <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 />