 Reference to Explosive Storage Regulations:

The International Fire Code (IFC 2021), Section 5604 and NFPA 495 (Explosive Materials Code) regulate the storage distances for Class 1.3 explosives (which include low explosives such as propellants and display fireworks).

Table 5604.5.2(3) of the IFC provides minimum separation distances between explosives storage and public traffic routes based on the weight of the explosives.

 Determining the Correct Distance:

According to IFC Table 5604.5.2(3), for 1,750 lb. of Class 1.3 explosives, the minimum separation distance from a public traffic route is 115 feet.

 Clarification of Incorrect Answer Choices:

A. 50 ft. → Incorrect

50 feet is too close and does not meet the safety requirements for explosive storage.

B. 75 ft. → Incorrect

75 feet is insufficient based on IFC and NFPA separation tables.

D. 150 ft. → Incorrect

While more distance is safer, the minimum requirement is 115 feet, making 150 feet unnecessary per code.

 Conclusion:

The correct and verified answer is C (115 feet) based on IFC Table 5604.5.2(3) and NFPA 495 requirements for Class 1.3 explosives storage near public traffic routes.