🌊 WPI — BC / AB / SK / MB · CLASS III WATER TREATMENT
Class III Formula Sheet
Advanced treatment, membranes, process control & regulatory calculations for the WPI Class III exam
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Ozone & UV Disinfection
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Membrane Filtration
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Advanced Coagulation & Process Control
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Hydraulics & Pumping
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Regulatory & QMS Calculations
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Sludge & Residuals Management
⚡ Quick Reference — Class III Key Values
Ozone CT (3-log Giardia, 25°C)2.0 mg·min/L
UV Dose (4-log Crypto)40 mJ/cm²
MF/UF Typical Flux20–80 LMH
RO Typical Recovery70–85%
Rapid Mix G300–1000 s⁻¹
Flocculation G10–75 s⁻¹
Flocculation Gt10,000–100,000
Sedimentation SOR (conventional)20–40 m/d
TTHM MAC (RAA)0.100 mg/L
HAA5 MAC (RAA)0.080 mg/L
Giardia log removal (filtration credit)2-log
Cryptosporidium log removal (filtration credit)2.5-log
Virus log removal (filtration credit)2-log
Alum alkalinity consumption0.5 mg CaCO₃ per mg alum
Minimum residual alkalinity (coagulation)> 30 mg/L as CaCO₃