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tech Analytical Labs,Inc 525 Del Rey Avenue,Suite E Sunnyvale,CA 94086 QUALITY CONTROL RESULTS SUMMARY METHOD ICP QC Batch # SM981207 Date Analyzed 12/07/98 Matrix Solid Extraction Method EPA 3050 Units mgikg Spiked Sam le Blank S tke ! PARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS in g mg/kg mg/kg m %R m Kg. %R RPD %R I'Arsenic Ant�mony 6010 <0 50 50 1 na na na na na 1 na 1 250 71-102 ; 6010 <0 50 1 50 na na na na na na 250 59-116 'Barium 6010 <0 50 ' I � 50� � na � na � na � na � na 1 na 25 0 75-107 ; 'Beryllium 6010 <0 50 50 1 na 1 na 1 na na 1 na 1 na 250 I 78-99 1' 1 I 1 1 1 1 1 f 1 1 'Cadmium ; 6010 <0 50 11 50 11 na ; na na na na ; na 250 i 1 74-101 1 ; 11 1 IChrom�um 6010 1 <0 50 50 1 na I na 1 na I na I na I na 25 0 69-105 1 1 1 1 1 , 1 1 1 , 1 6010 1 <0 50 1 50 1 1 1 l 1 na 1 250 1 76-100 ,'Cobalt na na na na na Kopper I 6010 1 <0 50 1 50 1 na I na 1 na I na 1 na I na 1 25 0 1 64-117 1 1 1 1 1 1 , , 1 1 1 1 1 ;Lead 6010 <0 50 1 50 0 0 ; 45 90 42 85 1 60 250 62-115 ii i i i i i i 1 i i i gMolybdenum. 1 6010 I <0 50 , SD na na na na , na na 250 , 57-114 Nickel 1 6010 I <0 50 1 50 1 na 1 na I na 1 na I na 1 na I 250 1, 69-1201 , 1 { 1 ,Selenium 6010 <D 50 1 50 I na I na 1 na 1 na 1 na 1 na 1 250 I 56-122 1 ' er 6010 1 <0 50 1 50 na I na na na na I na 25 0 70-106 1 1 1 1 1 1 , 1 1 , 1 1 Ilum 1 6010 I <050 1 50 1 na 1 na 1 1 1 1 na na na na I 25 0 1 54-115 1 Vanadium 6010 1 <0 50 50 na na na na na I na 250 1 64-126 1 'Zinc 6010 <0 50 50 na na na na na na 250 67-112 1 [Note LCS and LCSD results reported for the following Parameters All i Acceptable LCS and LCSD results are reported when matrix Interferences cause MS and MSD results to fall outside established QC limits Definition of Terms na Not Analyzed in QC batch MB Method Blank SA Spike Added r r i SR Sample Result SP Spike Result I SP(%R) Spike%Recovery ' SPD Spike Duplicate Result SPD(%R) Sptke'Duplicate%Recovery I , I