Table 1.

Description of the sanitation projects subjected to EIA in Chile.

Letter	Description
o.1	Sewage systems for ≥10,000 inhabitants.
o.2	Sewage systems or stormwater evacuation facilities when they are interconnected for ≥10,000 inhabitants.
o.3	Drinking water systems that include uptaking and conveying water works, and intermediate processes to the user place for ≥10,000 inhabitants.
o.4	Wastewater treatment plants for ≥2500 inhabitants.
o.5	Treatment and/or disposal plants for solid waste from domestic and sanitary origin, transfer stations, and collection and classification centers serving ≥5000 inhabitants.
o.6	Submarine emissaries.
o.7	Treatment and/or disposal plants for liquid industrial waste, which meet one of the following conditions at least: (o.7.1) Include stabilization ponds. (o.7.2) Effluents are reused for irrigation, infiltration, sprinkling, and vial wash-down. (o.7.3) Provide treatment waste services to third parties. (o.7.4) Treatment of effluents with average daily pollutant load ≥ the equivalent sewage for 100 inhabitants, in one or more of the discharge quality standards.
o.8	Treatment and/or disposal systems for solid industrial waste with treatment capacity ≥30 tons per day or ≥50 tons of disposal.
o.9	Treatment and/or disposal and/or elimination systems for hazardous waste with treatment capacity of 1000 kg per day and 25 kg per day for those catalogued as “acute toxic” waste according to the Supreme Decree SD148 of 2003 of the Ministry of Health [23].
o.10	Treatment and/or disposal and/or elimination systems for special hazardous waste from human health requirements, with treatment capacity ≥250 kg per day.
o.11	Repair or recovery of contaminated areas covering ≥1 hectare.