Comprehensive and Detailed Step-by-Step Explanation:
Guard Post Requirements:
Per NFPA 1 (Fire Code), Section 60.5.1.9, guard posts installed to protect hazardous material areas from vehicular impact must be placed at least 5 feet (1.5 m) from the tank.
Purpose of the 5-Foot Requirement:
Ensures adequate buffer space between the vehicle barrier and hazardous materials, reducing the risk of damage or spills from accidental collisions.
Other Options Explained:
Options A (2 ft), B (3 ft), and C (4 ft): Do not meet the minimum distance requirement under NFPA standards.
Summary:
Guard posts must be installed 5 feet (1.5 m) from hazardous material tanks to ensure proper protection.