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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precision & Accuracy) <br /> Method 8140 <br /> FORWARD, INC. Date of Report: 02/05/98 <br /> P. 0. BOX 6336 Sample Matrix: Water <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-00502 1 <br /> I I I MS I MSD 1 I I Precision I Accuracy 1 <br /> Sample I MS I MSD ( Spike I Spike I (Spike I Control I MS I MSD I Control 1 <br /> Constituents IQC Sample ID I Result I Result I Result I Level I Level (Units 1R.P.D.1 Limits 1% Rec 1% Rec I Limits 1 <br /> t i i u <br /> 1Bolstar 120-Jan 1 < 1 3.93 1 3.75 1 4.77 1 4.77 Iug/L 1 4. 1 71 82. 1 79. 1 51 - 1401 <br /> 1Coumaphos 120-Jan 1 < 1 1 9 01 1 9.29 1 8.80 1 8.80 (ua/L 1 3. 1 71102. 1106. 1 9 - 1721 <br /> 1Disulfoton 120-Jan < 1 3 74 1 3.27 1 5.18 1 5.18 199/L 1 13. ( 161 72. 1 63. 1 46 - 1101 <br /> 1Phorate 120-Jan 1 < 1 1 5.39 1 5.45 1 9.64 1 9.64 1µq/L 1 1. 1 71 56. 156. 1 39 - 1201 <br /> 1Sti rophos I I I I I I I I I I I I I <br /> 1 (Tetrachlorivinphos) 120-Jan < 1. 1 3.39 1 2.93 1 4.88 1 4.88 Iµg/L 1 14. 1 341 69. 1 60. 1 37 - 1291 <br /> MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference <br /> Quality ontroL Officer <br /> t"o anno <br /> 4100 Atlas Ct. Bakersfield, CA 93309 (805)827-491 1 FAX (8051327-191 B <br />