Which of the following is vital to ensuring safety around CNG delivery systems?

Regular inspections for leaks are essential to ensuring safety around CNG delivery systems. This practice is critical because compressed natural gas can be hazardous if it escapes into the atmosphere. Identifying and repairing leaks promptly helps prevent explosions and fire hazards, which can occur if CNG ignites. Regular monitoring allows for the detection of potential issues before they escalate into dangerous situations, thereby protecting both workers and the surrounding environment.

While other choices address different aspects of operational safety, they do not directly contribute to mitigating the inherent risks posed by CNG itself. For example, training staff on customer interactions is valuable for communication but does not impact the physical safety of the delivery system. Using decorative barriers might serve an aesthetic purpose or provide limited physical separation, but does not ensure the integrity of the gas delivery system. Minimizing communication on site could lead to misunderstandings or the overlooking of safety precautions, which would not foster a safe working environment.

Thus, the focus on regular inspections is the most critical factor in maintaining a safe working environment around CNG delivery systems.