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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# SMS1000926 Date analyzed 09/27/00 <br /> Matrix Solid Spiked Sample Blank Spike <br /> Units pg/kg <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> pg/kg ug/kg pg/kg %R pg/kg %R RPD <br /> 11,1-Dichloroethene 8240/8260 25 ND 1 l9 6 ; 78 21 5 86 92 25 65-I35 ; <br /> I!Benzene <br /> I 8240/8260 I 25 ND I 202 81 I 207 83 24 25 65-135 <br /> ;Tnchloroethene 8240/8260 25 ND ', 20 1 ; 80 21 2 85 53 1625 65-135 <br /> ;Toluene 8240/8260 25 1 ND 210 84 213 85 14 25 65-135 <br /> r <br /> �Chlorobenzene � 8240/8260 ± 25 ND 1 208 1 83 21 3 SS 24 1 25 65-135 <br /> I <br /> , <br /> ;Surrogates I <br /> Toluene A8 8240/8260 102% 98% 96% 65-135 k <br /> o o ' 65-135 <br /> I Dibromofluoromethane 8240/8260 I 97% r 108 e/o 1110/° , <br /> �4-8romofluorobeiizene 8240/8260 j 98% 113% , <br /> 65-135 j <br /> MTBE-d3 1 8240/8260 72% 91% 93% 65-135 <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> SA Spike Added <br /> SR Sample Result <br /> RPD(%) Duplicate Analysts - Relative Percent Dtfference <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 />