CPWM Study Guide 2026
Everything you need to pass the CPWM exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CPWM Exam Format at a Glance
📚 CPWM Topics to Study (69)
✍️ Sample CPWM Questions & Answers
1. What is the key difference between 'solid waste' and 'hazardous waste' under RCRA?
RCRA defines 'solid waste' broadly (including liquids and gases) and hazardous waste is a subset of solid waste that either appears on EPA lists or exhibits ignitability, corrosivity, reactivity, or toxicity.
2. What is the primary regulatory purpose of a gas collection and control system (GCCS) at a municipal solid waste landfill?
A GCCS is required under the Clean Air Act to collect LFG and route it to a control device (flare or energy recovery system) to prevent uncontrolled release of methane and non-methane organic compounds.
3. The TCLP (Toxicity Characteristic Leaching Procedure) is used to determine whether a waste exhibits which hazardous characteristic?
TCLP simulates leaching in a landfill environment to assess whether a waste can release toxic constituents above regulatory levels.
4. In an LFG collection system, what does a negative wellhead pressure (vacuum) measurement indicate?
Negative (vacuum) wellhead pressure confirms that the blower is successfully applying suction to pull LFG from the waste mass into the collection system; pressure levels are adjusted to balance collection efficiency against air infiltration.
5. In a drop-off recycling program serving a rural county, which factor most significantly affects program cost-effectiveness?
In rural programs, low population density means higher per-ton collection costs, and long transport distances to processors drive up haul costs, making site placement critical to economic viability.
6. What OSHA standard requires employers to train workers on hazardous chemicals in the workplace and provide Safety Data Sheets?
OSHA's Hazard Communication Standard (HazCom/GHS) requires SDS access and employee training on chemical hazards.