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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 /> Matrix Spike and Matrix Spike Duplicate <br /> QC Batch 9: SGCMS991129 Date analyzed: 11/29/99 <br /> Matrix: Solid Spiked Sample: 17693-006 <br /> Units: µg/kg <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> µ€/kg 4g/kg [ pg/kg %R pg/kg %R l RPD %R <br /> r ;1,1-Dichloroethene 8240/8260 ; 25 ND 24 95 26 104 T 9.6 25 50-150 <br /> ;Benzene 8240/8260 25 ND 25 98 27 108 i 8.9 25 50-150 <br /> ;Trichloroethene 8240/8260 25 ND 24 94 26 103 1 8.9 25 50-150 <br /> Toluene 8240/8260 25 ND 1 24 96 27 109 1 12.9 25 50-150 ; <br /> ' Plarobenzene 8240/8260 25 ND 22 89 25 1 100 1 11.8 25 50-150 l <br /> ; <br /> 'Surrogates <br /> ;Dibromofluoromcthane 8240/8260 ; ; 125% 111% ; ; 106% ; 65-135 <br /> 1-2-Dichloroethane 8240/8260 147%* ; 128% 1 116% 65-135 <br /> tTaluenn-d8 1 8240/8260 108% 104% 106% i 65-135� ; <br /> 4-6romofluorobenzene 8240/8260 92% 99% 100% ; 65-135 <br /> High surrogate recovery due to matrix interference. <br /> 1walculated Recoveries Outside of Recovery Limits: <br /> 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 /> NC: Not Calculated <br />