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LABORATORIES B C LABORATORIES <br /> QUALITY CONTROL REPORT <br /> (Precision & Accuracy) <br /> Method 8140 <br /> FORWARD, INC. Date of Report: 05/22/98 <br /> P. 0. BOX 6336 Sample Matrix: Water <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-04298-1 <br /> MS I MSD I I I Precisions I Accuracy i <br /> Sable MS MSD I Spike I Spike I ISpike I Control I MS I MSD I Control <br /> NConstituents IQC Sample ID I Result I Result I Result I Level ( Level jUnits JR.P.D.1 Limits 1% Rec 1% Rec I Limits <br /> 'Bolstar IOFW I < 1. 1 6.68 1 5.41 I 4.77 1 4.77 I►c9/L 1 21. 1 30140. 1113. I 51 - 1401 <br /> lCoumaphos IOFW f < 1. 1 13.72 1 12.77 ( 8.80 1 8.80 lug/L 1 7• 1 301156. 1145. 1 9 - 172' <br /> IDisulfoton IOFW I < 1. 1 7.08 1 5.73 I 5.18 1 5.18 Jag/L 1 21. 1 301137. 1111. 1 46 - 110' <br /> Phorate IOFW I < 1. 1 13.11 1 10.36 9.64 1 9.64 1alL 1 23. 1 301136. 1107. 1 39 - 1201 <br /> iStirophos-Tetrachlorivinphos JOFW < 1. 1 6.64 1 5.23 1 4.88 1 4.88 Iµg/L 1 24. 1 30136. 1107. 1 37 - 1291 <br /> N I I I I I i I 1 I 1 1 I <br /> MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference <br /> The matrix spike recoveries for disulfoton and phorate are outside QC limits. <br /> The sample report is flagged accordingly. <br /> QualV:4' <br /> trot Officer <br /> '' <br /> nthon anno <br /> 4100 Atlas Ct. Bakersfield, CA 93300 (305]027-491 1 FAX (800):327-1 91 B <br />