ABC Wastewater Collection Class II study guide
ABC Wastewater Collection Class II · Work through your exam, one topic at a time.
The ABC Wastewater Collection Systems Operator Class II certification is a voluntary, third-party credential for people who operate and maintain sanitary sewer collection systems. It sits at the intermediate level: above entry-level Class I and below the advanced Class III/IV grades, so it assumes you already know how a collection system is put together and can work without constant supervision. The ABC Wastewater Collection Class II study guide has 9 sections and about 2,184 words.
01Collection System Operations and Maintenance
Operations and maintenance questions test whether you understand how a collection system behaves as a whole, not just individual components. Know the difference between preventive maintenance (scheduled inspection, cleaning, root control, lubrication) and corrective maintenance (repairing a failure after it occurs).
294 words, about 1 min02Sewers, Lift Stations, and Pumping Equipment
This domain covers the physical system: gravity sewers, force mains, lift stations, and pumps. Understand why lift stations exist (to lift flow when gravity grade is insufficient), how wet wells and dry wells differ, and how pumps are controlled by level (float switches, bubbler, ultrasonic, pressure transducers).
310 words, about 2 min03Safety and Confined Space Entry
Safety questions are heavily weighted and often the easiest points to earn if you know the rules. A confined space is large enough to enter, has limited entry/exit, and is not designed for continuous occupancy.
288 words, about 1 min04Wastewater Flow, Hydraulics, and Capacity
Hydraulics questions test whether you can reason about flow, velocity, slope, and capacity. Know the continuity equation (Q = A × V), Manning's equation conceptually, and the difference between gravity and pressure flow.
247 words, about 1 min05Inspection, Testing, and Rehabilitation
This domain covers how utilities find and fix defects. Know the inspection methods and what each is best at detecting, plus the common rehabilitation techniques and their limits.
219 words, about 1 min06Regulations, Permits, and Reporting
Regulatory questions test your familiarity with the Clean Water Act framework, NPDES permits, and reporting obligations. Know that the NPDES program regulates point-source discharges, that collection systems may be covered under a general permit, and that SSOs must be reported per permit and state rules.
229 words, about 1 min07Math and Calculations
Math questions reward method over memorization. Set up the problem, track units, and sanity-check the answer.
205 words, about 1 min08Pretreatment, Grease, and Odor Control
Pretreatment protects the collection system and treatment plant from industrial and commercial discharges. Grease and odor control are the most visible field problems.
192 words, under 1 min09Recordkeeping, Asset Management, and Public Relations
This domain tests the management side: how utilities track assets, plan maintenance, and communicate with the public. Know the difference between reactive and preventive maintenance, the purpose of a computerized maintenance management system (CMMS), and the basics of asset management (condition, criticality, and risk).
200 words, about 1 min