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ASSOCIATED LABORATORIES <br /> • QA REPORT FORM <br /> QC Sample LR 83988-184 <br /> Matnr WATER <br /> Prep Date 12/01/01------ <br /> Analysis <br /> 2101/0IAnalysts Date 12/01/01 12/02/01 <br /> LAB ID#'s to Batch LR 84034 <br /> MATRIX SPIKE I MATRIX SPIKE DUPLICATE RESULT <br /> REPORTING UNITS= uglL <br /> Sample Spike Matrix Matrix %Rec %Rec <br /> Test Method Result Added SpIke 5 k Dup MS MSD RPD <br /> Benzene 8021 ND 10 0 101 99 101 99 2 <br /> Toluene 8021 ND 10 0 95 95 95 9S 0 <br /> Ethylbenzene 8021 ND 10 0 10 4 102 104 102 2 <br /> Xylenes 8021 ND 200 18 7 187 94 94 0 <br /> ND-Not Deterred <br /> . RPB=Relan.e Percenr Difference ofMarric Spike and Matra Spike Dup 91.RECLIMI7S = 70 130 <br /> ..REC AIS&MSD-Percent Reco.ery of Watra Spike&Maira Spike Duplicate IRPD L1MIM a 30 <br /> PREPARATION BLANK I LAB CONTROL SAMPLE RESULTS <br /> PREP BILK LCS <br /> Test Method Value Resuit True %Rec L Limit H Lmut <br /> Benzene 8021 ND 99 10 0 99 80% 120% <br /> Toluene 9021 ND 9 9 10 0 99 80% 120% <br /> Ethylbenzene 8021 ND 101 to 0 lot 80% 120% <br /> Xylenes 9021 ND 190 1 200 95 80% 120% <br /> LCS -Lab Control Sample Result <br /> TRUE=Tme Value of LCS <br /> L LIMIT I H LIMIT-LCS Control Lunits <br /> SURROGATE RECOVERY <br /> Sample No AAA-TFT <br /> QC Limit 70-130 <br /> QA Sample 915 <br /> MS 98 <br /> MSD 97 <br /> Method Blank 93 <br /> • LCS t 95 <br /> AAA TFT-a a a Trifluororoluene <br /> 1215'2001 8021 btex 1201w <br />