A. Whenever it is necessary to break through existing pavement for the purpose of constructing gas service facilities, and where trenches are to be four feet (4') or over in depth, the pavement and the base shall be removed to at least six inches (6") beyond the outer limits of the subgrade that is to be disturbed in order to prevent settlement, and a six inch (6") shoulder of undisturbed material shall be provided on each side of the excavated trench. The face of the remaining pavement shall be approximately vertical.
B. A power-driven concrete saw shall be used to cut a kerf sufficient to permit complete breakage of concrete pavement or base without ragged edges.
C. Asphalt paving shall be scored or otherwise cut in a straight line. No piledriver may be used in breaking up the pavement. (Ord. 157 § 420, 1961)