LANDFILL LECTURE 5

What is a borehole?

• A wide tunnel used for mining operations.

• A narrow shaft bored into the ground for geotechnical investigation, environmental assessment, or installing underground utilities.

• A type of well used for extracting oil and gas.

• A large pit dug for construction purposes.

What is site investigation in geotechnical engineering?

• The process of collecting information, appraising data, assessing, and reporting to understand the hazards in the ground beneath a site.

• A method for designing buildings based on aesthetic principles.

• A technique used to measure soil moisture levels for agricultural purposes.

• An analysis of the historical significance of a construction site.

What is the recommended design life for landfill sites?

• 5 years

• 10 years

• 15 years

• 20 years

What are the main purposes of site investigation?

• Assess the aesthetic appeal of the site.

• Achieve safe and economical design of foundations and temporary works.

• Understand the historical significance of the site.

• Foresee and mitigate difficulties during construction.

What are the considerations for landfill site selection?

• Sufficient land area and volume for landfill capacity.

• Proximity to urban centers for easy access.

• Avoidance of steep gradients.

• Close proximity to water bodies for drainage.

What are Atterberg Limits?

• Basic measures of the critical water contents of fine-grained soil: shrinkage limit, plastic limit, and liquid limit.

• A method to determine the density of coarse-grained soil.

• The maximum moisture content at which soil can be compacted.

• A classification system for coarse aggregates.

What is the purpose of laboratory testing in site investigation?

• To determine the color and texture of soil samples.

• To test disturbed and undisturbed samples for classification, quality, permeability, shear strength, and compressibility.

• To assess the environmental impact of the site.

• To evaluate the historical significance of the site.

What is hydraulic conductivity?

• A property that describes the ease with which a fluid can move through pores or fractures in soils and rocks.

• A measure of the ability of a material to retain water.

• The rate at which water evaporates from a surface.

• A property that indicates the strength of soil under load.

What is required for the issuance of an ECC?

• A positive review of the ECC application by the Environmental Management Bureau (EMB) after assessing potential environmental impacts.

• A payment of the ECC application fee to the local government.

• A public consultation with local communities regarding the project.

• An environmental impact assessment report submitted by the project proponent.

What factors affect site investigation?

• Size and type of the project.

• Weather conditions during the investigation.

• Availability of construction materials.

• Degree of risk or safety involved.