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I <br /> Entech Analytical Labs,Inc. 525 Del Rey Ave„ Sutte E <br /> Sunnyvale, CA 94086 <br /> QUALITY CONTROL RESUL'T'S SUMMARY <br /> Volatile Organic Compounds <br /> QC Batch N WGCMS9812I7 Date analyzed 12/18/98 <br /> Matrix Water Spiked Sample Blank Spike <br /> Units Ag/u <br /> PARAMETER ; Method# ; SA SR SP SP SPD SPD RPD QC LIMITS <br /> • 4w, AWL ug/L %R µeL ' %R ; RPD 1 %R <br /> 1I I.DlchloroeLhena 18240/82601 25 1 ND 23 92 1 24 1 45 26 1 25 1 50-150 1 <br /> ;Methyl-tent-butyl ether 1824018260; 25 ; ND 24 98 ; 27 ; 106 ; 93 25 50-150 <br /> 1 1 <br /> 1&nxcnc 1824)182601 25 ; ND 1 23 1 92 1 24 1 94 1 2 6 ; 25 1 54-150 i <br /> iTn(.hl0rocthCnC 1$240/82601 25 ND 1 27 1 108 28 1 114 1 5 1 1 25 1 50-150 1 <br /> ;Toluene. ;824018260; 25 ND 26 ; 104 1 26 j 106 1 I ; 25 50-150 <br /> Whlorobenzene18240182(501 25 ND 25 102 1 26 103 16 25 50-150 f <br /> 1 1 1 I A 1 1 I 1 f 7 1 <br /> f 1 1 1 1 1 1 1 1 1 I <br /> 1 1 1 1 1 1 f 1 1 1 1 1 <br /> 1 I 1 1 1 1 f ! 1 1 1 r <br /> • I <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> SA Spike Added <br /> SR Sample Result <br /> RPI](%) Duplicate Analysis-Relative Percent Difference <br /> Sp Spike Result <br /> SP(%R) Spice%Recovery <br /> SPD Spike Duplicate Result <br /> SPD(°!eR) Spike Duplicate%Recovery <br /> NC Not Calculated <br /> 1 <br /> 1 1 1 <br /> I <br /> 1 I I 1 E <br /> 1 <br /> d 1 ! I I E i I id 08D jai rff �� WId90 TT 661.I ST wbf l I , <br />