CEA Air Emission Monitoring & Control 2

Question 1

Under 40 CFR Part 75, which facilities are required to use Continuous Emission Monitoring Systems (CEMS)?

Accepted Answer

Electric utility steam generating units subject to the Acid Rain Program

Answer

40 CFR Part 75 specifically requires CEMS for electric utility steam generating units regulated under the Acid Rain Program (Title IV of the CAA).

Question 2

What is the primary purpose of a Relative Accuracy Test Audit (RATA) for a CEMS?

Accepted Answer

To compare CEMS data against reference method measurements to verify accuracy

Answer

A RATA compares CEMS measurements with simultaneous reference method (stack test) measurements to verify that the CEMS accurately reflects actual emissions.

Question 3

Which EPA method is the reference method for measuring particulate matter emissions from stationary sources?

Accepted Answer

EPA Method 5

Answer

EPA Method 5 is the reference method for determining particulate matter emissions from stationary sources using an isokinetic sampling train.

Question 4

A stack test result shows SO2 emissions of 1.8 lb/MMBtu against a permit limit of 1.5 lb/MMBtu. What is the compliance status?

Accepted Answer

Out of compliance, because measured emissions exceed the permit limit

Answer

Measured SO2 emissions of 1.8 lb/MMBtu exceed the permit limit of 1.5 lb/MMBtu, placing the facility in noncompliance regardless of the margin.

Question 5

What does the term 'isokinetic sampling' mean in the context of stack emissions testing?

Accepted Answer

Sampling at a rate equal to the stack gas velocity to avoid biasing particle collection

Answer

Isokinetic sampling means the sampling rate matches the stack gas velocity so that particles enter the probe in proportion to their actual concentration, avoiding size-biased errors.

(CEA) Certified Environmental Auditor Practice Test

(CEA) Certified Environmental Auditor Practice Test

CEA Air Emission Monitoring & Control 2