Question

______is an instrument that is used to detect the presence of specific volatile organic compounds, such as gasoline,

 and methane in a landfill, through the use of shallow boreholes.

1. electrical resistivity meter
2. ground probing radar
3. geo magnetics
4. photoionisation meter

Answer 1

Correct Answer - Option 4 : photoionisation meter

Concept:

Photoionisation meter:

Typical photoionization detectors(PID) measure volatile organic compounds and other gases in concentrations from parts per billion(ppb) to 10 000 parts per million (ppm). The photoionization detector is an efficient and inexpensive detector for many gases and vapor analytes. PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas chromatography or as hand-held portable instruments. A PID is a very sensitive instrument used in a wide variety of applications such as:

• Industrial hygiene and safety
• Environmental contamination and remediation
• Hazardous materials handling
• Ammonia detection
• Lower explosive limit measurements
• Arson investigation
• Indoor air quality
• Cleanroom facility maintenance