AQS Mitigation Strategies 3

Question 1

Fugitive dust emissions from an unpaved haul road are best controlled using which mitigation measure?

Accepted Answer

Applying chemical dust suppressants or watering the road surface

Answer

Watering or applying chemical suppressants binds surface particles and prevents wind and vehicle traffic from suspending dust into the air.

Question 2

Under EPA's Enhanced Inspection and Maintenance (I/M) program, what is the main vehicle emission control goal?

Accepted Answer

Identify and repair high-emitting vehicles to reduce on-road fleet emissions

Answer

Enhanced I/M programs test actual tailpipe emissions and OBD systems to find and repair gross emitters, reducing fleet-average emissions significantly.

Question 3

Stage II vapor recovery systems at gasoline service stations are designed to capture which pollutant during vehicle refueling?

Accepted Answer

Volatile organic compounds (VOCs) / gasoline vapors

Answer

Stage II systems use a vacuum-assist or balance nozzle to recover fuel vapors displaced from the vehicle tank during refueling, preventing VOC release.

Question 4

Which agricultural practice is a direct mitigation measure for ammonia (NH3) emissions from livestock operations?

Accepted Answer

Covering manure storage lagoons

Answer

Covering manure storage lagoons prevents volatilization of ammonia, which is a precursor to secondary PM2.5 formation.

Question 5

A construction project near a non-attainment area must implement Best Available Control Measures (BACM) for fugitive dust. Which of the following is NOT a typical BACM for construction sites?

Accepted Answer

Operating equipment only during daylight hours

Answer

Limiting operating hours to daylight is a noise control measure, not a recognized dust control BACM for construction sites.

(AQS) Air Quality Specialist Certification Practice Test

(AQS) Air Quality Specialist Certification Practice Test

AQS Mitigation Strategies 3