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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# SMS000417 Date analyzed 04/17/00 <br /> Matrix Solid Spiked Sample Blank Spike <br /> Units pgfkg <br /> PARAMETER Method# SA I SR I SP = SP SPD SPD RPD QC LMIITS <br /> pglkg pg/kg p8/kg %R = pg/kg %R RPD <br /> �1,117ictiloroeshene 8240/8260 1 25 = ND 1 223 1 $9 1 219 $8 18 25 65-135 <br /> '-Benzene j 8240/8260 25 ND 26 0 104 25 S lOZ i 9 25 65-13511 <br /> ,TmIloroeihene 8240/8260 25 ND ; 26 6 ; 105 27 3 ; 109 ; 2 6 25 ; 65-135 <br /> 1 <br /> 'Toluene 8240/8260 25 i ND 262 105 i 259 104 i 12 25 65-135 <br /> 'Chlorobenzene 8240/8260 25 ND 25 8 103 25 3 1 101 20 25 ; 65-135 <br /> 1 <br /> 1 k1 ' 1 1 <br /> ,Surrogares i i i 1 1 1 1 1 1 i <br /> j ;Toluene-d8 ; 8240/8260 103% 104% '- 101% ; 65-i35 <br /> 4Dibromofluaromethane 8240/8250 100% 110% s 107% 1 65-135 i <br /> 1s-Sromonuomlenzene 8240/8260 1 103% 111% i 109% i i 65-135 <br /> 1 8240/8260 108% ; 130% ; 125% ; 55-135 <br /> 1,2-Dichlorotthanc d4 1 1 , <br /> i <br /> Defiruuott of Ter-iris <br /> na Not Analysed to QC batch <br /> SA Spike Added <br /> SR Sample Result <br /> r RFD(%) 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 /> NC Not Calculated <br /> i <br /> E <br /> i <br /> '� I <br />