Which of the following is NOT a way to prevent contamination?

• A. Letting drains get backed up or clogged up to prevent water flow
• B. Keeping drains clear and routine drain maintenance
• C. Using spill containment and cleanup procedures
• D. Proper waste segregation and disposal

Answer: (A)

Contamination prevention in welding environments hinges on containment, cleanup readiness, and proper waste management. Letting drains back up or clog is not a containment measure; it creates conditions where liquids and contaminants can overflow, spread, and reach floors, soils, or water systems. This undermines any effort to keep pollutants from moving around.

Keeping drains clear and performing routine maintenance prevents blockages that could lead to spills or runoff. Spill containment and cleanup procedures provide a controlled way to capture and recover any spilled material, limiting where contamination can travel. Proper waste segregation and disposal ensures contaminated materials are kept separate from clean waste and disposed of correctly, reducing cross-contamination and environmental release.