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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precision & Accuracy) <br /> Method 8140 <br /> Date of Report: 04/23/98 <br /> FORWARD, INC. <br /> Sample Matrix: Stormwater Runoff <br /> P. 0. BOX 6336 <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-03292 - 1 <br /> Precision Accuracy <br /> MS I MSD I i I <br /> 1 1 Sample I MS I MSD I Spike i Spike I (Spike I Control I MS I MSD I Control <br /> Constituents IQC Sample ID I Result I Result ( Result I Level I Level (Units IR.P.D.1 Limits 1% Rec 1% Rec I Limits I <br /> IBolstar (3/27/98 < 1 5.18 I 5.47 1 4.77 I 4.77 lug/L 16 I 71108. 1115. I 51 - 1401 <br /> ICoumaphos 3/27/98 < 1 I 8.77 8.22 I 8.80 I 8.80 lug/L 16 I 71100. 193. I 9 172' <br /> IDisulfoton 3/27/98 _1 < 1 7.28 I 5.23 5.18 I 5.18 lug/L 133. I 161141. 1101. I 46 1101 <br /> (Phorate 13/27/98 I < 1. 1 13.57 I 8.39 i 9.64 I 9.64 Iµg/L 147. I 71141. 187. I 39 1201 <br /> tl <br /> MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference <br /> The spike RPD and matrix spike recovery for Phorate and Disulfoton are outside <br /> QC limits. The sample report has been flagged accordingly. <br /> Quality Cop�tr t Officer <br /> Ant o y onanno <br /> 4100 Atlas Ct. - Bakersfield, (3A 933019 - (805)327-491 1 - FAX(800)327-191 B <br />