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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Laboratory Control Sample) <br /> Method 8140 <br /> FORWARD, INC. Date of Report: 05/20/98 <br /> P. 0. BOX 6336 Sample Matrix: Water <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-04298-1 <br /> Accuracy <br /> QC Sample Spike Control <br /> Constituents Sample ID Result Level Units % Rec Limits <br /> Bolstar LCSW 4.970 4.770 L 104. 47 - 137 <br /> Couma hos LCSW 11.838 8.800 L 135. 5 - 169 <br /> Disulfoton LCSW 4.528 5.180 L 87. 34 - 122 <br /> Phorate LCSW 7.862 9.640 L 82. 7 - 137 <br /> Stirophos <br /> (Tetrachlorivinphos) LCSW 4.743 4.880 µq/L 97. 30 - 123 <br /> Quart Control Officer <br /> Bonanno <br /> 4100 Atias Ct. Bakersfield, CA 93308 • (805) 327-491 1 FAX(B05)327-191 B <br />