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' Entech AnalyticalInc• tl Lbs ISZS Del Rey Avenue,Suite E <br />' QUALITY CONTROL RESULTS SUMMARY Sunnyvale,CA 9086 <br />' Volatile Organic Compounds <br /> Laboratory Control Sample <br /> QC Batch#�WMS991224Date analyzed 12/24/99 <br /> Matrix Liquid . Spiked Sample Blank Spike <br /> Units µSIL <br /> PARAMTERMethod# SA SR SP SP SPD SPD RPD QC LIMITS <br /> Ng/I- µg/- µgr- ° µg/L °/ RPD I %R <br /> ;1,1-D,chloroethene 1 8240/8260 1 40 ND 285 ,7 1 28 5 71 00 1 25 1 <br /> 1 1 I 1 1 <br /> ' <br /> Methyl-tert-butyl ether 1 8240/8260 I 40 ND 1 268 67 1 27 7 1 3 3 1 25 1 50-150 <br /> Benzene 1 8240/8260 1 40 ND 264 66 1 26 1 1 65 1 1 I 25 1 50-150 ; <br /> �Tnchlomethene ; 5240/8260 40 ND ; 30 0 I 75 ; 30 1 5 0 3 25 1 50-150 <br /> 1Toluene 8240/8260 40 1 ND 25 5 64 25 5 64--1 0 0 1 25 50-150 <br />' ;Chlorobenzene 8240/$260 40 ND 27 4 69 27 2 0 7 25 50-150 I <br /> 1 Sun ogales i i i <br /> 1Dibromofluoromethane ` ' ' ' ' ' ' 1 <br /> 8240/8260 1 1 9S% I 99% 1100% I ; 65-135 <br />' 'MTBE-d3 8240/$260 101% i 97% 1 ; 101% <br /> 65-13 5 <br /> 1 1 I 1 i 1 1 , , <br /> Toluene-d8 8240/8260 1 95% 93% 1 94% I i 65-135 1 <br /> 4-Bromofluorobenzene 1 8240/8260 195% 1 94% 94% 65-135 <br />'.Definition of Terms <br /> na Not Analyzed in QC batch <br /> SA Spike Added <br />' SR Sample Result Yy /0 v,) <br /> RPD(%) Duplicate Analysts -Relative Percent Difference l <br /> SP Spike Result <br />' SP (%R) Spike%Recovery <br /> SPD Spike Duplicate Result C <br /> SPD(%R) Spike Duplicate%Recovery <br /> I <br /> I <br /> i <br /> I <br /> r <br />