Emissions Control & Environmental Compliance Flashcards

A fleet manager must comply with EPA's National Emission Standards for Hazardous Air Pollutants (NESHAP). Which type of pollutants does NESHAP specifically target?

Answer: Hazardous air pollutants (HAPs) such as benzene and formaldehyde

NESHAP targets hazardous air pollutants (HAPs), which are 187 substances identified under CAA Section 112 that pose cancer or other serious health risks.

Which OBD-II monitor evaluates the efficiency of the catalytic converter by comparing upstream and downstream oxygen sensor signals?

Answer: Catalyst monitor

The catalyst monitor uses the switching frequency ratio of upstream versus downstream oxygen sensors to assess catalytic converter oxygen storage capacity and efficiency.

An environmental compliance officer identifies that a company failed to submit its annual Toxic Release Inventory (TRI) Form R. This violates which law?

Answer: EPCRA Section 313

EPCRA Section 313 requires facilities meeting threshold criteria to annually report releases and transfers of listed toxic chemicals on EPA Form R.

Which component in a diesel emissions system chemically reduces NOx by injecting a urea solution (DEF) into the exhaust stream?

Answer: Selective Catalytic Reduction (SCR) system

The SCR system uses diesel exhaust fluid (urea/DEF) which converts to ammonia in the exhaust to reduce NOx to harmless nitrogen and water.

What is the EPA's definition of a 'major source' under the Title V operating permit program for CAA criteria pollutants?

Answer: A facility emitting 100 tons per year or more of any regulated air pollutant

Under Title V, a major source generally emits 100 tons per year or more of any regulated air pollutant (lower thresholds apply in nonattainment areas).

During an EVAP system large leak test (P0455), a technician uses a smoke machine. Where should smoke be introduced into the system?

Answer: Through the fuel tank filler neck or EVAP service port with the fuel cap removed

Smoke is introduced into the EVAP system via the fuel tank filler neck or a dedicated service port to pressurize the sealed system and locate leaks.

Which CAA provision allows states to develop their own State Implementation Plans (SIPs) to meet NAAQS in nonattainment areas?

Answer: Title I Part D

Title I Part D of the Clean Air Act requires states with nonattainment areas to develop SIPs with enforceable measures to achieve NAAQS within specified deadlines.