What are the two points of reference used by Nicor to measure from?

The correct answer highlights the two essential points of reference that Nicor utilizes for measurements: the Property Line and the Center Line.

Understanding these references is crucial in gas line installations and maintenance. The Property Line serves as a boundary marker indicating the limits of ownership and often defines where the utility service enters a property. This ensures that installations comply with legal and safety regulations pertaining to distance and accessibility. The Center Line refers to the central axis of a road or utility line, which is important for positioning gas mains and ensuring that gas services are installed in accordance with code requirements regarding clearances and safety protocols.

In practical applications, using these two reference points helps technicians to accurately determine the appropriate placement of gas pipelines and service connections, ensuring safety and adherence to local regulations. In contrast, the other options provided may reflect various components encountered within utility work, but they do not serve as the primary or standardized reference points used by Nicor in their operations.