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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br />' QC Sample LR 128831-518634 <br /> Matrix WATER <br /> 1 Prep Date 05/07/04 <br /> Analysis Date 05/07/04 <br /> ID#'s in Batch LR 128779, 128785, 128831, 128911 <br /> MATRIX SPIKE I MATRIX SPIKE DUPLICATE RESULT <br /> Reporting Units= mg/L <br /> 1 Sample Spike Matrix Matrix %Rec %Rec <br /> Test Method Result Added Spike Spk Dup MS MSD RPD <br />' TRPH 418 1 ND 4 12 350 3 90 85 1 95 L 11 <br /> RFD=Relative Percent DiJjerence of Matrix Spike and Matrix Spike Duplicate ©rREC LIMITS = 70 - 130 <br /> 16REC-MS&MSD=Percent Recovery ofMalrix Spike&Matrix Spike Duplicate RPD LIMITS = 30 <br /> PREPARATION BLANK/LAB CONTROL SAMPLE RESULTS <br /> PREP BLK LCS <br /> Value Result True %Rec L Limit H Limit <br /> ND <br /> 1460 16 50 88 80% 120% <br /> iValue=Preparation Blank Value ND=Not-Detected <br /> LCS Result=Lab Control Sample Result <br />' True=True Value of LCS <br /> L Limit/H Limit=LCS Control Limits <br /> 5/13/2004 4181_trph 0507w <br />