Street improvements for all streets which shall be included in the property owners' petition, the total cost of which shall be assessed against the abutting property owners, shall include the following:
(A) Storm sewer drainage facilities, including drainage pipe 30 inches or less in diameter, inlets and other necessary incidentals as may be required by town specifications;
(B) Curb and gutter as required by town specifications;
(C) Grading for a width of 30 feet on those streets which were opened prior to February 9, 1965 and which need to be graded prior to resurfacing;
(D) Base course material for a width of 18 feet if existing base course is not adequate in accordance with town specifications;
(E) Street surfacing according to town specifications for a width of 16 feet.
(`88 Code, § 18-81)