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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> • QC Sample LR 87295-770 <br /> Matrix WATER <br /> Prep Date 01/28/02 <br /> 0 <br /> Analysts Date 01/28-29/02 <br /> LAB ID#'s to Batch LR 87343,87344,87345,87305,87362 <br /> MATRIX SPIKE 1 MATRIX SPIKE DUPLICATE RESULT <br /> REPORTING UNITS= ag/L <br /> Sample Spike Matrix Matrix %Rec %Rec <br /> Test Method Result Added Spike S k Dup MS MSD RPD <br /> Benzene 8021 ND 10 87 87 87 87 0 <br /> Toluene 8021 ND 10 85 84 85 84 1 <br /> Ethylbenzene 8021 ND 10 93 94 93 94 I <br /> Xylenes 8021 ND 20 I8 8 185 94 93 2 <br /> ND=Not Detected <br /> a <br /> RPD-Relative Percent Difference of Matrix Spike and Matrix Spike Dzip '%.REC LIMITS = 70 130 <br /> 11oREC MS&MSD-Percent Recovery of Matrix Spike&Mairix Spike Duplicate JPPD LIMIT S = 30 <br /> PREPARATION BLANK/LAB CONTROL SAMPLE RESULTS <br /> PREP BLK LCS <br /> Test Method Value Result True %Rec L Limit H Limit <br /> Benzene 8021 ND 8 9 10 89 80% 120% <br /> Toluene 8021 ND 8 5 10 85 80% 120% <br /> Ethylbenzene 8021 ND 94 10 94 80% 120% <br /> X lenes 8021 ND 181 20 9l 80% 120% <br /> LCS -Lab Control Sample Result <br /> TRUE=True Value of LCS <br /> L LIMIT/H LIMIT=LCS Control Limits <br /> SURROGATE RECOVERY <br /> Sample No AAA-TET <br /> QC Limit 70-130 <br /> QA Sample 92 <br /> MS 94 <br /> MSD 93 <br /> Method Blank 93 <br /> . LCS 96 <br /> AAA-TFT-a a a Trifluorotoluene <br /> 211/2002 8021 blex 0128w <br />