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Entech Analytical Labs, Inc 525 Del Rey Avenue,Suite E <br />' Sunnyvale,CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br />' METHOD Gas Chromatography <br /> QC Batch## GBG2990114 Date Analyzed 01/14/99 <br />' Matrix Soil Quality Control Sample Blank Spike <br /> Units Ag/kg <br /> 1 ' <br /> PARAMETER Method# : MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> ' Pg/kg ; IaP,/k'; µ9/kg : 901-9 % R ; µg/lcg %R ; RPD 1 %R <br /> Benzene 1 8020 I <5 0 1 80 ND 77 96 I 72 1 90 64 1 25 1 81-111 I <br />' 1 S 1 t <br /> 1 1 7 1 E 1 1 ! 1 1 1 <br /> ;Toluene 8020 <5 4 80 ND 1 77 46 73 91 50 25 81-111 1 <br /> ;Ethyl Benzene 8020 I 0 I I I I I <br /> <5 1 80 ND 1 77 97 73 91 t 5 8 25 81-110 , <br /> (Xylenes 8020 1 <5 0 1 240 I ND 230 96 I 220 1 92 1 47 1 25 1 82-110 1 <br /> (Gasoline 1 8015 1<1000 00; 1000 1 ND 1 1050 105 1 930 93 1 121 1 25 I 70-125 1 <br /> Note LCS and LCSD results reported for the following Parameters <br />' .411 <br />' Acceptable LCS and LCSD results are reported when matrix interferences cause MS and MSD results to fall outside <br /> established QC limits <br />' Definition of Terms <br /> na Not Analyzed in QC batch <br />' MB Method Blank <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%Recovery <br /> NC Not Calculated <br /> 1 - <br />