For the purposes of these subsections, "common property" shall mean all land areas used in common for septic, drainage, parking or other land uses. In addition, common property shall include, without limitation, such personal property as pumps, pump chambers, piping, valves, manholes, culverts, asphalt and other paving materials, and septic tanks as may be used by two or more units or buildings in a PMLD. Common property may also include similar personal property such as septic tanks even if not used by more than one unit if such personal property is to be maintained as a part of the common scheme for the PMLD.