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Waste Final Quiz
Modules 10 and 11
| Question | Answer |
|---|---|
| What is the final cover? | 30 cm thick cover soil |
| What should the final cover provide? | Protection from extreme weather, withstand corrosion, provide structural stability, resist settlement, resist reactions, and resist disruptions by plantlife |
| Layers of the cap (bottom to top) | Final Lift, Subcase, Barrier Layer (geomembrane), Drainage Layer (sand/gravel), Protective Layer, Surface Layer |
| Sub base details | Low to medium field capacity Follows contour of land May include gas collection |
| Barrier Level details | Geomembrane Prevents water infiltration and gas from leaving |
| Drainage Layer Details | Low field capacity Directs percolated moisture away from the landfill |
| Protective layer details | High field capacity soil |
| Surface layer details | High field capacity and supports growth of plants |
| How do you plant trees in the cap? | The hole must be at least twice the size of root depth |
| T or F 90% of landfill settlement will occur in the first five years post closure. | True |
| Why is landfill settlement inversely proportional to compaction? | -decomposition, gas loss, leachate generation decreases -overburden pressure |
| Hazardous waste regulations in AB | AEPEA AER Public Health Act Federal Atomic Energy Control Act Transportation of Dangerous Goods Act |
| Two ways of classifying hazardous waste in AB? | By the AEPEA Waste Managers Guide or by AER Directive 058 |
| Four questions in determining wastes | 1. Is it a waste 2. Is it exempt 3. Is it hazardous 4. Can it be landfilled |
| What even is a substance | Anything that can be dispersed or transformed |
| Why might a waste be exempt under the waste regulation? | -Not hazardous -Regulated by another act -Too hazardous |
| Why might a waste be hazardous? | - Discarded chemicals -Unique waste stream -Has specific characteristics |
| Characteristics of a hazardous waste | -Too liquidy, under pH 2, over pH 12, flashpoint less than 61C, spontaneously combusts -Oral LD50 below 5000ppm -Dermal LD50 below 1000ppm -Inhalation LD50 below 10 000ppm -More than 50ppm PCB |
| TCLP meaning | Toxicity Characteristic Leaching Procedure |
| DOW meaning | Dangerous Oilfield Wastes |
| T or F DOW is the same as hazardous waste | Basically true |
| Stabilization vs solidification | Stabilization decreases solubility, solidification converts waste to a solid |
| What is waste fixation | Stabilization and solidification |
| What is sorption? | Sponging off the liquid |
| What are pozzolan processes? | Using volcanic ash to convert to an inert solid waste |
| What is thermoplastic encapsulation? | Radioactive waste dispersed in a heated matrix like asphalt |
| What is vitrification? | Combine waste with molten glass, which is costly and used for highly toxic waste |
| What should the destruction removal efficiency be if using incineration? | 99.999% |
| Example of solid waste incinerator | Rotary kiln incinerator |
| Example of wet waste incinerator | Liquid injection incineration |
| Concept of deep well injection | Dispose hazardous waste into a deep confined aquifer |
| Disposal well details | -Fill the annular space with a noncorrosive liquid to detect leaks - Packing between casings |
| Issues with deep well disposal | -What if it leaks -Wastes water that could be recovered |
Created by:
swilson67
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