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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> QC Sample LR 124622-498552 <br /> Matrix WATER <br /> Prep Date 02/23/04 <br /> Analysis Date 02/23/04 <br /> ID#'s to Batch LR 124585, 124622, 124810 <br /> MATRIX SPIKE/MATRIX SPIKE DUPLICATE RESULT <br /> Reporting Units— mg/L <br /> Sample Spike Matrix Matrix %Ree %Rec <br /> Test Method I Result Added Spike Spk Dup MS MSD RPD <br /> TRPH 4I 3 I ND 4 12 380 360 92 87 5 <br /> RAD=Relative Percent Difference of Mau ra Spike and Matrix Spike Duplicate %REC LIMITS = 70 - 130 <br /> %RLC-MS&MSD=Pei cent Recovery of Matrix Spike&Matra Spike Duplicate RPD LIMITS = 30 <br /> • <br /> PREPARATION BLANK/LAB CONTROL SAMPLE RESULTS <br /> PREP BLK LCS <br /> Value I Result True %Rec I L Lutut H Limit <br /> ND 1720 1650 104 800/0 120% <br /> Value=Prepwation Blank Value ND=Not-Detected <br /> LCS Result=Lab Conti of Sample Result <br /> True=True Value ofLCS <br /> L Limit/11 Limit=LCS Control Limits <br /> • <br /> 2/25/2004 4181_irph_0223w <br />