Technical depth
Check command of the specific regimes they cite: Title V and NSR permitting, NPDES discharge limits, RCRA generator status, SPCC plans, and AP-42 emission factor calculations.
Evidence to listen for
- Explains the physics or mechanism behind their work, not just the tooling
- Names the standards, tolerances, and constraints they designed against
- Can defend a design decision under follow-up questions
- Distinguishes what they personally engineered from what the team delivered
Five-point scoring guide
Cannot explain the fundamentals of their own stated specialism.
Knows the vocabulary but not the underlying mechanism; struggles under follow-ups.
Solid working knowledge for the role; depth thins out on edge cases.
Strong command of the domain; explains trade-offs and defends decisions well.
Names the exact permit conditions and rule citations they worked under, and explains how emissions or discharge limits were calculated.