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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precision & Accuracy) <br /> FORWARD, INC. Date of Report: 04/27/98 <br /> P. 0. BOX 6336 Sample Matrix: Stormwater R <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-03292 - 1 <br /> MS MSD Precision Accuracy <br /> Sade I Sample MS MSD I Spike Spike ISamplelspike I Control I MS I MSD I Control <br /> (Constituents JQC Sade ID I Result IDuplicate Result Result Level Level jUnits JR.P.D.IR.P.D.1 Limits 1% Rec 1% Rec I Limit <br /> (Nitrate as N 13287-9 1 1.92 1.98 7.30_� 7.27 I 5.00 5.00 Img/L 13 1 0 I 101108. 1107. I _80 - 1201 <br /> fpH 13270-1 7.98 7.99 I IpH Units 10 I 1 t.1 PH UNI <br /> 'Electrical Conductivity I i I I I 1 i <br /> i s 25 C 13270-1 J>20000 >20000 I Iumhos/cm 1 0 1 I 101 1 l I <br /> (Total Suspended Solids I I I I I I I 1 <br /> I using glass fiber Type A/E 13291-1 40 I 42 �_� I I Imq/L i 5 1 I 101 1 1 <br /> 'Non-Volatile Organic Carbon 13176-1-X100 1 7318. 7362. 9314. 9286. 1 2000. ( 2000. (mg/L 1. 1 0. 10100. 1 98. 1 80 120' <br /> MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference <br /> Quality Control Officer <br /> . A, 2, <br /> Anthony Bonanno <br /> 41 00 Adas Ct. • Bakersfield, CA 9-3308 • (805)327-491 1 • F=AX (805)327-19 1 8 <br />