WOH Operator Math Packet V2

This packet teaches the mathematical foundations operators use daily: order of operations, averages, percentages, area, and volume. Certification exams typically weight math at 30–50% of points, making these skills critical. The content moves from basic arithmetic through the pound formula for chemical dosage, with worked examples and worksheets throughout.

Key topics include unit conversions, chemical feed pump calibration, detention time calculations, well drawdown, and lift-station volume. Operators need to master order of operations (PEMDAS) since incorrect calculation order produces wrong doses. The packet emphasizes practical shortcuts: circle area = 0.785 × D², and converting percentages to decimals before using them in dosage formulas.

The resource includes worksheets on basic math, unit conversions, BOD and TSS loading, lift-station wet-well volume, and pump drawdown, along with pre- and post-tests and advanced review problems. Each section builds toward real-world operator tasks like reading meters, setting chemical feed rates, and tracking residuals.