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' Entech Ana - <br /> lytical Labs, Inc. 525 Del Rey Avenue,Suite E <br />' Sunnyvale, CA 94086 <br /> QUALITY CONTROL RESULTS SUMMARY <br />' METHOD Gas Chromatography <br /> QC Batch# GBG2990115' Date Analyzed 01115/99 Mamx Soil <br /> Units ug/kg Quality Control Sample Blank Spike <br />' PARAMETER : Method# : MB SA : SR : SP SP SPD SPD RPD QC LIMITS <br /> µg/kg µg/kg ltJ^g . la g % R ' Pg/kg %R RPD 1 %R <br /> 'Benzene 1 8020 1 <5 0 1 80 I ND 74 93 € 78 1 98 I 54 1 25 1 81-111 I <br />' ,Toluene 8020 <5 0 80 ND 74 93 79 98 57 25 81-111 I <br /> (Ethyl Benzene ; 8020 ; <5 0 ; 80 ; ND 75 94 '1 77 96 I 25 25 81-110 ; <br /> Xylenes 8020 I <5 0 1 240 1 ND 1 229 95 1 243 1 101 1 63 1 25 1 82-110 1 <br />' ,Gasoline 8015 +<1000 001 1000 ND980 98 1 1 1010 1 101 1 30 25 70-125 1 <br /> 1 1 1 1 <br /> Note LCS and LCSD results reported for the following Parameters <br />' All <br /> / <br /> i <br />' Acceptable LCS and LC.SD results are reported when matrix interferences cause MS and MSD results to fall outside <br /> established QC limits <br /> IDefinition 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 /> • <br />