The sites are in the coastal plain, are most concerned in case of contamination by the potential impact on aquifers, due to its high permeability effects on water, surface water in the discharge of oil or other wastes produces decreased oxygen content, increase of solids and organic and inorganic substances. In the case of groundwater, the greatest damage is manifested in an increase in salinity, pollution of aquifers with water from oil production high salt content, often occur in places like the coasts, where there are some refineries. Offshore, the barge spilled oil, either accidental loss, as happened when a ship has an accident, or intentionally. For example, by washing their ponds in the ocean. The platforms that extract oil and gas from the seabed and the oil motor boats and smaller vessels also contribute to the pollution of the marine ecosystem.
Industry data show that a refinery could generate approximately 2 Hm3/year waste water that are discharged into water bodies. Effects on air: The environmental impacts of refining oil, mainly from gas emissions, discharges of liquid, solid, sound, smell and visual effects. The uptake of gas is determined by the gas / oil, whichever is higher, the gas is captured and if low, sell and / or burned by torches. Mainly for reasons attributed to the transport control systems and monitoring of vehicles with since oil fields and pipelines to refineries. Hazardous waste: solid materials, slurries, liquids and as the gas in containers, which, being the result of a process of production, processing, use or consumption, its producer intended to neglect and composition containing any of the substances and materials listed in the Annex to this Law quantities or concentrations as to pose a risk to human health, natural resources and environment.