Table 1.
Site-specific hazard index (HI), by waste site.
| Hazard Index (HI) | Waste Site | Rationale |
|---|---|---|
| 5A | Burning of waste, plastic and temporary waste storage | Possible contamination of all environmental media (air, soil, water) and presumed presence of high hazardous waste. |
| 4A | Potentially very hazardous and hazardous non-visible waste (sunken or buried), quarries with sunken waste | Possible contamination of soil and groundwater. Considering that the wastes are non-visible, we presumed that they are hazardous or very hazardous. |
| 4B | Illegal dumps and uncontrolled landfills with contaminated groundwater and soil | Presence of hazardous waste, with contamination of soil and groundwater. |
| 3B | Illegal dumps with documented contamination of soil, spillage of sludge on contaminated soil, illegal heaps of hazardous waste (asbestos, tires, household appliances, paints, also volume < 10,000 mc), dumps of metallic drums, hazardous and no hazardous waste in quarry | Hazardous waste, with potential contamination of soil. |
| 2B | Waste treatment plants with documented contamination, illegal heaps of urban and undefined waste, storage and treatment disposals of hazardous waste | Documented or potential contaminated sites with hazardous and undefined waste. |
| 2C | Illegal heaps/dumps of special non-hazardous waste, landfills of special/industrial waste, disused industrial activities with documented environmental contamination | Sites with special/industrial waste with possible release of hazardous substances. |
| 1C | Car wrecking and scrapping plants, electric and electronic waste reclaim plants, treatment plants of spills and special waste | Plants that, if well managed, are not supposed to generate environmental impact. Waste with prevalent inorganic compounds, and possible release of dangerous substances. |
| 1D | Temporary storage of non-hazardous waste or organic substances, illegal heaps (>10,000 mc) of non-hazardous and urban waste, plants of recycling and reuse of specific substances, landfills of urban waste and biogas plants with documented contamination | Non-hazardous waste with predominant organic compounds in contexts with a risk of potential release of hazardous substances. |
| 1E | Uncontrolled landfills of urban waste, dumps of non-hazardous waste, illegal heaps of urban (<10,000 mc) and inert waste (>10,000 mc) | Non-hazardous waste in uncontrolled disposals, with possible environmental contamination. |
| 1F | Controlled landfills of urban waste, plants of waste treatment, plants for refuse-derived fuel selection and production, refluent-water depuration plants, plants of organic substances reuse, illegal heaps of undefined waste | Non-hazardous waste in controlled disposals and illegal heaps of undefined waste, with unlikely release of hazardous contaminants. |
| 1F * | Temporary waste storage sites, disused industries and quarries, without any information | Waste storage sites and activities of undefined typologies, with possible environmental impact. |