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' ntech 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# WMS000128 Date analyzed 01/28/00 <br />' <br /> Matrix Liquid Spiked Sample Blank Spike <br /> Units 1t8/- <br />' PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> ug/L Pg/L I192 %R µ9/1- %R RPD ; %R <br /> 11,1-Dichloroethene ; 8240/8260 ; 40 1 ND ; 480 120 473 ; 118 1 1 5 25 50-150 <br /> ;Methyl-tent-bury!ether 8240/8260 40 ND ; 4119 ; 102 421 106 18 ; 25 ; 50-150 ; <br /> ;Benzene ; 8240/8260 ; 40 ; ND ; 433 ; 108 430 ; 108 ; 07 ; 25 ; 50-150 <br /> ,Tnchloroethene ' ; <br /> ' 8240/8260 ; 40 ; ND ; 42 9 ; 107 ; 45 1 1 113 ; 5 0 ; 25 ; 50-150 ; <br /> , <br /> 'Toluene 1 8240/8260 1 40 1 ND 1 432 1 108 1 434 1 109 1 05 1 25 1 50-150 <br /> ` t <br /> Chiorobenzene � 8240/8260 � 40 � ND f� 429 1 107 1 433 1� 108 � 09 � 25 50-150 <br /> 1 Surro Ales <br /> 1 1 ; ; 0 1 0 1 ; o ; 1 1 65-135 <br /> ,Dtbromofluaromethane , 8240/8260 , 96/0 , 41/0 , , <br /> ; 1 ; 1 0 1 0 ; ; 96o p � ; <br />' 1MTSE-d3 8240/8260 88/0 95/0 , , <br /> 96/0 1 1 1 65-135 1 <br /> 1Toluene-d8 ; 8240/8260 1 1 94% 1 96% 1 1 95% ; 1 1 ; 65-135 ; <br /> 14-Bromof]uorobenzene 1 8240/8260 1 1 86% 1 92% 1 97% 1 1 ; 65-135 1 <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 /> 1 <br />