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l <br /> t 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# SMS000418 - Date analyzed 04/18/00 <br /> Matrix Solid Spiked Sample Blank Spike <br /> Units µg/kg <br /> t <br /> ARAAETER i—Method#ii—SA=i=SR=i=SP—!=SP==SPD= =SPD='=RPD QC WMTTS <br /> + 119/kg pg/kg 99/kg + %R ' Pg/kg %R RPD <br /> I +1,1-Dictitomettiene 8240/8260 25 ND z 221 88 216 +1. 86 + <br /> 2-3 1 25 65-135 <br /> 'Benzene 1 8240/8260 25 ND 253 101 25 4 1 102 1 04 1 25 65-135 <br /> ' 8240/8260 { 25 ND 250 100 247 99 = 12 25 65-135 <br /> Tnctdoroethene , <br /> t Toluene 1 8240/8260 25 1 ND 1 250100 1 ° ' ' <br /> It <br /> 25 4 102 16 25 65-I35 <br /> Plombenzene I 8240/8260 1 25 1 ND 250 1 100 25 1 1 100 11 0 4 1 25 I 65-135 <br /> ,,,Surrogates <br /> �:Toluene-d8 t 82401$260 � � 105% � 98% � � 101% <br /> e <br /> 65-135 <br /> tDtbrornofluoromethane 8240/8260 101% 96% 98% 65-135 <br /> 14Bmmofluombenzrne 8240/8260 1 1 99% 95% 1 1 97% 1 65-135 <br /> + + + , <br /> 2- 8240/8260 109% ; 97% 97% 1 1 1 1 65-1354a' <br /> 1,� ptchloroethane-d4 + <br /> Definition of Terms <br /> na Not Analyzed in QC batch �J <br /> SA Spike Added <br /> SR Sample Result <br /> RPD(%) Duplicate Analysis-Relative Percent Difference �) <br /> SP Spike Result <br /> F SP(%R) Spike%Recovery <br /> t SPD Spike Duplicate Result <br /> SPD(%R) Spike Duplicate%Recovery <br /> NC Not Calculated <br /> i <br /> wit <br /> �f <br /> i <br />