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1 <br /> 1 ASSOCIA7ED LABORATORIES <br /> QA REPORT FORM <br /> 1 QC Sample LR 74159-026 <br /> Matrix WATER <br /> 1 Prep Date 06/09/01 <br /> Analysts Date 06/09/01-06/10101 <br /> LAB ID#'s in Batch LR 74159,74109 <br /> MATRIX SPIKE/MATRIX SPIKE DUPLICATE RESULT <br /> REPORTING UNITS= ug/L <br /> Sample Spike Matrix Matrix %Rec %Rec <br /> Test Method Result Added Spike Spk Dup MS MSD RPD <br /> Benzene 8021 ND 100 1029 1036 103 104 1 <br /> Toluene 8021 ND 10 0 880 894 88 89 2 <br /> Ethylbenzene 8021 ND 100 1041 1063 104 106 2 <br />�. Xylenes 8021 ND 200 1850 1868 93 93 1 <br /> ND=Not Defected <br /> RPD=Relative Percent Drerence of Matrix Spike and Matrix Spike Dup %REC LIVITS = 70-130 <br /> %REC-MS&MSD=Percent Recovery of Matrix Spike&Matrix Spike Duplicate RPD LIMITS = 30 <br /> PREPARATION BLANK/LAB CONTROL SAMPLE RESULTS <br /> PREP SLK JLCS <br /> Test Method Value Result True %Rec L Limit H Limit <br /> Benzene 8021 ND 1046 100 105 80% 120% <br /> Toluene 8021 ND 9 04 100 90 80510 120% <br /> Ethylbenzene 8021 ND 1080 100 108 80% 120% <br /> Xylenes 8021 ND 19 07 200 95 1 80% 120% <br /> LCS =Lab Control Sample Result <br /> TRUE=True Valtie of GCS <br /> L LIMIT/H LIMIT=LCS Control Limits <br /> i <br /> 6/19/01 r 8021—blex 0609w1 <br />