SAQs

1. What do you mean by Stack Sampling?

Definition of Stack Sampling

Stack sampling is a method used to determine the concentration of pollutants in the exhaust gases emitted from industrial stacks, chimneys, or vents. The primary goal of stack sampling is to quantify the amount of pollutants released into the atmosphere.

Purpose of Stack Sampling

Stack sampling is conducted to:

• Monitor the efficiency of air pollution control devices
• Determine compliance with emissions standards and regulations
• Identify potential sources of pollution
• Evaluate the effectiveness of pollution control strategies
• Gather data for dispersion modeling and air quality impact assessments

Methods of Stack Sampling

There are several methods of stack sampling, including:

• Isokinetic sampling: involves collecting a representative sample of the exhaust gases
• Non-isokinetic sampling: involves collecting a sample that may not be representative of the exhaust gases
• Grab sampling: involves collecting a single sample at a specific point in time
• Continuous sampling: involves collecting a series of samples over a period of time

2. List the Objectives of using Control Equipment.

Objectives of Control Equipment

The objectives of using control equipment are: