18-Env-A6 Solid Waste Engineering and Management · December 2013
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Reference texts: Tchobanoglous, Theisen & Vigil, Integrated Solid Waste Management: Engineering Principles and Management Issues; Freeze & Cherry, Groundwater (Darcy's Law, vadose zone); CCME, Guidance Document on Landfill Gas Management; EGBC/Engineers Canada 04-Env-A6/18-Env-A6 examination syllabus.
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) Load-count analysis — record the number and approximate volume/type of collection vehicle loads delivered to the disposal facility over a study period, combined with an assumed or measured average density, to estimate total volume/mass. (2) Weight-volume (scale) analysis — directly weigh incoming loads at a facility weigh scale over a representative period (the most accurate method where a scale exists, since it removes the density-assumption error of load-count analysis). (3) Materials-balance analysis — estimate generation indirectly from known per-capita or per-source generation factors (e.g., kg/capita/day by source, as in the Q13 generation study) applied to population/business counts, useful for forecasting or where no direct collection/weighing data exists yet.
