Materials, streams and uncategorised mass
Status: proposed
Weighed material is classified in one hierarchical material category scheme. The levels run from material family (paper and cardboard, plastics, metals, glass, composites, organics, sanitary, residual, hazardous, e-waste, textiles) down to grade or resin. Families align to cdm:WasteTypeScheme where it has a match, so that approved GHG methodologies can consume the quantities. A project declares the level it weighs at.
Each category has a default separation stream (recyclable, organic, residual or sanitary). A project may declare a different stream for a category in its design, but the category itself never changes.
Mass weighed without a category is uncategorised. It is reported as its own value, is never assigned to a stream by default, and never counts toward diversion.
Distilled from novaWaste2’s waste category catalog and material-family mapping (indicator judgements J1 and J2). novaWaste2 counted unsorted batches as recyclable on some reports, as uncategorised on others, and left them out of the recycling balance.