Definitions

Definitions. 1. Aggregate System – any subsurface disposal system that utilizes gravel, crushed stone, tire chips or other approved aggregate media. 2. Conventional Subsurface Aggregate Disposal System – any gravity-fed subsurface disposal field utilizing a loose aggregate media ranging from 36 to 12 inches in depth: a. Standard Subsurface Disposal: 25 in. to 36 in. b. Shallow Subsurface Disposal: 12 in. to 24 in. 3. Tire Chips – coarse aggregate made from recycled tires to substitute volumetrically for mineral aggregate for use as media in a conventional subsurface disposal field.