What is the minimum clearance required between the fencing and compression equipment?

The correct choice reflects the minimum clearance requirement necessary for safety around compression equipment. Maintaining a two-foot clearance is important because it allows for safe operation and maintenance of the equipment. This clearance helps in preventing accidental contact with machinery, which can pose a risk of injury, and it also provides adequate space for proper ventilation and emergency response if needed. Furthermore, this distance ensures that operators and maintenance personnel can work around the equipment comfortably without the risk of encroaching on operational zones that may contain moving parts or other hazards. It's crucial for safety standards and regulations to be followed in such scenarios to mitigate risks associated with compressed natural gas operations.