A-6 - Waste

A-6A - Solids

A-6A1 - Solid Waste Disposal

A-6A2 - Incineration and Open Burning of Waste

A-6A3 - Biological Treatment of Solid Waste

A-6A4 - Composting

A-6B - Non-Solids

A-6B1 - Wastewater Treatment

A-6B2 - Other Waste