Question 1

Why is a waste management system necessary before starting laboratory work?

Accepted Answer

A waste management system must be established before commencing any laboratory activity to ensure safe handling of hazardous waste from generation through disposal. Your institute's Environmental Health and Safety office develops systems complying with regulations like OSHA standards to protect public health and the environment throughout the waste lifecycle.

Question 2

What are the main strategies for reducing chemical waste in the laboratory?

Accepted Answer

Reduce chemical waste by minimizing operation scale, substituting hazardous reagents with less toxic alternatives, and storing only quantities needed for near-term use. You can also recycle solvents like acetone through distillation. These efficient waste management practices significantly decrease the volume of hazardous material requiring disposal.

Question 3

How should chemical waste containers be labeled and organized?

Accepted Answer

Affix labels to waste containers immediately when chemicals are added, writing full chemical names and approximate compositions. Segregate waste into separate containers for halogenated, nonhalogenated, and aqueous materials to prevent dangerous heat or gas formation. Store containers in a designated satellite accumulation area near the point of generation.

Question 4

What personal protective equipment is required when handling chemical waste?

Accepted Answer

Wear proper personal protective equipment including a lab coat, goggles, and gloves, along with long pants and closed-toed shoes whenever handling any chemical waste. This comprehensive protection safeguards against chemical exposure and contamination during waste collection, storage, and transport procedures.

Question 5

How should sharps and broken glass be disposed of in the laboratory?

Accepted Answer

Dispose of chemically contaminated needles, syringes, and razor blades, collectively known as sharps, inside a designated sharps waste container. For broken glass, used pipettes, or test tubes, use a specialized glass waste container. Empty bottles can be reused after triple rinsing with acetone, water, and acetone again.

Question 6

What happens to chemical waste after it reaches the central accumulation area?

Accepted Answer

Once containers are filled to capacity, they are carefully moved to a designated central accumulation area. From this central location, the waste is removed for disposal at an offsite final destination facility. Regulated handling continues throughout this transfer to ensure compliance with safety and environmental standards.

Question 7

Where should chemical waste be stored before transport to the central accumulation area?

Accepted Answer

Store chemical waste in suitable containers such as plastic carboys or glass bottles in a designated satellite accumulation area near the point of generation. Containers must be kept in a fume hood or other well-ventilated area to minimize exposure and prevent vapor accumulation in the laboratory.

Proper Waste Disposal - Assessment Quiz