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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precision & Accuracy) <br /> FORWARD, INC. Date of Report: 04/01/98 <br /> P. 0. BOX 6336 Sample Matrix: stormwater <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-01936 - 1 <br /> I I I I I I I MS I MSD I I I I Precision) I I Accuracy I <br /> I I I Sade I Sade I MS I MSD I Spike I Spike I ISamplelSpike I Control I MS I MSD I Control I <br /> (Constituents 1QC Sample ID I Result IDuplicate I Result I Result I Level I Level (Units JR.P.D.IR.P.D.1 Limits 1% Rec 1% Rec I Limi <br /> (Nitrate as N 1785-8 0.420 J 0.426 1 5.335 1 5.319 1 5.000 1 5.000 Img/L I<PQL 1 0. 1 101 98. 1 98. 1 83 - 1121 <br /> IpH 11885-1 1 7.850 I 7.860 1 I 1 IpH Units 1 0. 1 1 t.1 PH UNI <br /> (Electrical Conductivity I I I I I I I I I I I I I I I <br /> I a 25 C 11936-1 1 1560 1 1550 1 1 ( Jumhos/cm 1 1. 1 I 101 1 1 I <br /> I Tota t Suspended Solids I I I I I I I I I I I I I I <br /> I using glass fiber Type A/E 11891-2 I 52.50 1 53 501-� f I Ima/L 1 2. 1 1 101 1 1 <br /> INon-Volatile Organic Carbon 11925-1 ( 3.240 ( 3.267 I 24.81 1 24.95 1 20.00 1 20.00 (mg/L I<PQL 1 1. 1 101108. 1109. 1 80 1201 <br /> MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference <br /> Quality Co tro Officer <br /> thony Bonanno <br /> 4100 Atlas Ct. Bakersfield, CA 93308 • (805)327-491 1 FAX(805)327-191 B <br />