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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# WMS991227 Date analyzed 12/27/99 <br /> Matrix Liquid Spiked Sample Blank Spike <br /> Units µ$/L <br /> PARAMETER Method# SA SR SP SP SPD SPD RPD QC LIMITS <br /> µg/L lig/L Ag/L %R Itg/L %R RPD %R <br /> +11 1-Dichloroethene 1 8240/8260 40 ND 42 8 1 107 420 1 105 1 9 1 25 50-150 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> 1 <br /> :Methyl-tert-butyl ether " 8240/8260 40 ND 408 1 102 : 43 1 " 108 " 55 1 25 " 50-150 1 <br /> 1 1 1 1 1 ! 1 1 1 1 1 + <br /> :Benzene : 8240/8260 : 40 : ND : 411 : 103 : 417 : 1041 14 : 25 : 50-150 1 <br /> 1 1 1 1 I 1 1 1 1 1 1 1 <br /> :Tnchloroethene : 8240/8260 : 40 : ND : 456 1 114 : 456 1 114 : 00 : 25 : 50-150 <br /> 1 1 1 1 1 1 1 I 1 1 ! 1 <br /> :Toluene : 8240/8260 : 40 : ND : 408 1 102 1 407 1 102 1 02 : 25 : 50-150 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> 1Chlorobenzene 1 8244/8260 1 40 1 ND 1 42 1 105 1 41 8 1 105 1 07 1 25 1 54-150 1 <br /> 1 1 1 1 1 I 1 1 1 1 <br /> 11 1 1 1 1 I 1 I 1 1 {i 1 i <br /> 'surrogates 1 1 1 1 1 1 1 1 1 1 1 <br /> 1 1 1 1 1 1 1 1 I 1 1 1 <br /> 1 1 1 l 1 1 1 1 1 1 <br /> 'Dibrom1 <br /> ane 1 ofluororneth8240/8260 ' ' <br /> 1 1 1 1 1 98% 100% 'I 1 1 + 1 1 99% 65-135 1 <br /> 1 1 1 1 1 1 1 1 1 1 1 1 <br /> :MTBE-d3 : 8240/8260 : : 99% : 98% : : 100% : : : : 65-135 <br /> 1 1 1 1 1 1 1 1 1 1 + <br /> ' 8240/8260 : : 95% : 95% : : 93% : : : : 65-135 <br /> "Toluene-d8 1 1 1 1 1 1 1 1 1 1 <br /> 14-Bromofluorobenzene 1 8240/8260 1 1 94% 1 96% 1 94% : : : : 65-135 1 <br /> k 1 1 1 F 1 1 1 1 1 1 1 <br /> obefinition 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 />