The following words and terms, unless the context clearly indicates a different meaning, have the following meanings: (1) 'Affected residence' refers to a residence which has an ISDS failure or a contaminated domestic water supply; (2) 'Contaminated domestic water supply' refers to the primary source of drinking and household water for a residence which fails to meet generally accepted drinking water standards, or which the department of health has certified as undrinkable; (3) 'Domestic individual sewage disposal system' ('ISDS') refers to an existing disposal system which services an owner occupied, single family residence; (4) 'Failed domestic individual disposal system' refers to an ISDS system which has been determined to have failed by the land resources section of the department of environmental management, or a system which has required pumping out more than four (4) times in a one-year period; (5) 'Multiple domestic individual sewage disposal system failure' refers to a number of failed ISDS systems in close proximity to one another. History of Section.P.L. 1984, ch. 420, § 1.Rhode Island Legal Code