Which color marking indicates the presence of sewer or drain lines?

• A. Green
• B. Pink
• C. Yellow
• D. Red

Answer: (A)

The correct answer is green, which is the color traditionally used to mark the presence of sewer or drain lines. Color coding helps in identifying and locating various types of utilities safely and effectively during construction or excavation activities. Green markings specifically denote sanitary sewer systems, which ensures that workers are aware of the underground infrastructure related to wastewater management.

Understanding the color coding is crucial for pipeline construction inspectors, as it aids in preventing accidental damage to existing utilities. Identifying sewer and drain lines correctly reduces safety hazards and minimizes disruption during construction. By adhering to these color standards, inspectors can promote best practices for utility management and compliance with safety regulations.