18-Env-B5 Industrial & Hazardous Waste Management · December 2015
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Reference texts: Nemerow & Dasgupta, Industrial and Hazardous Waste Treatment, 2nd ed.; Metcalf & Eddy, Wastewater Engineering: Treatment and Resource Recovery, 5th ed.; Davis & Cornwell, Introduction to Environmental Engineering, 6th ed.; LaGrega, Buckingham & Evans, Hazardous Waste Management, 2nd ed.; CCME, Guidelines for the Management of Biomedical Waste in Canada (1992); Canadian Environmental Protection Act (CEPA), 1999; Basel Convention on the Control of Transboundary Movements of Hazardous Wastes (1989); provincial hazardous waste regulations (e.g. BC's Environmental Management Act and Hazardous Waste Regulation).
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
(1) Ignitability — a waste that is a liquid with a flash point below a regulatory threshold (typically 60°C), or a non-liquid capable of spontaneous combustion, or an ignitable compressed gas or oxidizer. (2) Corrosivity — an aqueous waste with a pH ≤ 2 or ≥ 12.5, or a liquid that corrodes steel at a specified rate, capable of destroying living tissue or containment materials on contact. (3) Reactivity — a waste that is normally unstable and readily undergoes violent change, reacts violently with water, generates toxic gases when mixed with water, or is capable of detonation. (4) Toxicity — a waste that, on standardized leaching (e.g. the toxicity characteristic leaching procedure), releases a regulated contaminant at a concentration above a defined threshold, indicating it can mobilize a hazardous constituent into groundwater under landfill conditions.
