Do we count emissions from disposing of biomass boiler ash?

Yes, if you send it away. Trucking the ash and its treatment is Scope 3 Category 5, usually small. Ash given to brick makers or farmers is a by-product, so count only transport. The boiler's methane and nitrous oxide stay in Scope 1.

Records

• Tonnes of ash removed, from weighbridge slips.
• Who took it and where.
• Truck distance.

Biogenic CO2

CO2 from burning biomass is reported separately, outside the scopes. Ash disposal does not change that.

What Senseible does here

Senseible reads bills, fuel invoices and production records into dated, fingerprinted records, so the figure you send a buyer can be traced to its documents.

• Biomass fuel still has CH4 and N2O
• Waste in Category 5

Sources: GHG Protocol Corporate Value Chain (Scope 3) Standard, IPCC 2006 Guidelines, Volume 2: Energy

Last reviewed 2026-10-22.