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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Laboratory Control Sample) <br /> FORWARD, INC. Date of Report: 04/01/98 <br /> P. O. BOX 6336 Sample Matrix: stormwater <br /> STOCKTON, CA 95206 <br /> CARRIE FISHER <br /> Samples Affected: 98-01936 - 1 <br /> Accuracy <br /> QC Sample Spike Control <br /> Constituents Sample ID Result Level Units % Rec Limits <br /> Nitrate as N LCSW 4.7 5.0 m L 94. 91 - 105 <br /> H LCSW 7.020 7.0 pH Units 100. 98 - 102 <br /> Electrical Conductivity <br /> 25 C LCSW 308.0 303. umhos cm 102. 90 - 110 <br /> Non-Volatile Organic Carbon LCSW 21.39 20. mg/L 107. 98 - 114 <br /> Qual/i�ty C ntrol Officer <br /> Anthoh Bonanno <br /> 4100 Atlas Ct. Bakersfield, CA 93308 (805) 327-1911 FAX(805)327-191 8 <br />