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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 /> �k QC Batch# SMS000417 Date analyzed 04/17/00 <br /> Matrix Solid Spiked Sample Blank Spike <br /> Units µgfk8 <br /> PARAMETER Method# SA SR SP SP SPD SPD RPDQ C LIMITS <br /> pig µg/kg Fi�kB %R pglkg %R RPD <br /> l,1 pichloroerhene 8240/8260 25 ND 223 1 89 1 21 9 1 88 1 8 25 65-135 <br /> 1 <br /> ;Benzene 8240/8260 25 ND 260 104 255 102 19 25 65-135 1 <br /> 1Tnchloroethene 8240/8260 25 ND 266 106 273 109 26 25 65-135 ; <br /> :Toluene 8240/8260 25 ND 262 105 259 104 l 12 25 65-135 <br /> �Chlorobenzene 8240/8260 25 1 ND 1 258 103 1 253 101 1 20 25 65-135 <br /> 'SU/TDgA1PS <br /> 1 1 1 1 1 1 f I 1 1 1 e <br /> ;Toluene-d8 1 8240/8260 1 103% ; 104% 1 101% 1 65-135 ; <br /> 1 1 1 0 1 0 1 0 1 I 65-135 <br /> ,Dibrotnofluommethane , 8240/$260 100% , 110% , , 107/0 1 1 , <br /> 1 1 1 1 , 1 , , , 1 l , <br /> 14-Broniotluombenzene 8240/8260 103% 1 111% 1 109% 1 1 1 1 <br /> 65-135 ' <br /> 2-D,chloroethane-M 8240/8260 1 108% + 130% 1 1 125% 1 1 65-135 1 <br /> Defirution of Terms <br /> na Not Analyzed to 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 /> I <br /> 1 <br />