The management of water resources

The management of water resources is an environmental issue which the SEA Group has for some time dedicated focus and its consolidated knowledge, following an undertaking to become entirely self-sufficient in the provision of water, through the construction of a series of independently managed wells which fulfill the hygiene/sanitary, fire control and “industrial” needs of both airports.

The principal water sources utilised are the aquifers, to which the 12 wells located at Malpensa and the 8 wells located at Linate are linked.

The water drawn from wells at the airport sites of Malpensa and Linate are distributed for consumption through internal aqueducts. The chemical/physical and quantitative control, in addition to the consumption rationalisation activities, ensure the highest level of attention to this important common resource.

Water requirements m3

 Water requirements m3

Note: The consumption figures include SEA Energia
Source: SEA

Water quality

SEA guarantees, in accordance with regulations and in strict collaboration with the control bodies such as Air Safety Board and the Health Boards, a high quality level of the water distributed, through a monitoring plan which provides for systematic chemical/physical control checks of the water quality provided. This monitoring allows also the SEA Group to guarantee the quality of the water and to avoid negative impacts from possible contamination through the continual control of the complete cycle, from the drawing from wells to the distribution on the network and the final discharge of water into the environment.

At both airports, the parameters analysed are significantly lower than the maximum levels permitted by law and highlight the good quality of the water distributed at both airports.

Discharge

The management of water discharge is principally related to the civil sewage filtering and collection systems (or related systems) from the airport infrastructure and from the meteorological wash away of impermeable areas. The collection and separation of domestic sewage from all buildings present at the airport is assured at Malpensa by the sewage network which delivers sewage to the San Antonio consortium filter system, while the Linate sewage network is linked to the Peschiera Borromeo filter system.

At both airports the quality of the sewage is within the limits established by environmental regulations.

Water drainage m3

Water drainage m3

Note: Discharge from Linate is divided into “sewage” and “surface water”. The quantification of surface water discharge is only possible considering the empirical difference between the total of water drawn and the quantity discharged as sewage, with a degree of approximation, taking account of the contribution from meteorological water. Discharges by SEA Energia are excluded Source: SEA

De-icing treatment, relating to the defrosting of aircraft during the winter and when required by the airlines, is carried out at dedicated stands, equipped with a system for the collection of any water discharge from the activities and is treated as special waste.

De-icing liquid drained (tonnes)
  2010 2011 2012
Malpensa 55 14 21
Linate 61 81 104
Source: SEA

The management of meteorological water

Meteorological water can be utilised (with the exception of first flush water which is discharged into the sewage system together with domestic sewage) for the soil at Malpensa and in surface water areas at Linate. In line with sector environmental regulations, collection, separation and treatment of meteorological water plant are in place at both Milan airports, comprising “continuous” oil extraction plant or first flush separation tanks. The quality of sewage falls within the limits established by the applicable environmental regulation, as highlighted below in the tables, which report the parameters monitored.

Currently, water re-usage systems are not in place at the airports. The SEA Group, together with other major European operators, is exploring many aspects related to Water Saving systems and the possible re-usage of meteorological water, in order to save aquifer drawn water and rationalise water consumption.

Spillages

SEA is committed to closely considering and ensuring the correct management of potential spillages. In the case of the accidental spillage of fuel or oil in operational areas, runways and stands, procedures are in placed to intercept fluids before they reach the meteorological water drainage systems. A specific procedure applicable to the terminal movement areas is in place at the airports in compliance with environmental protection regulations. Spillages have reduced slightly, most likely as a result of reduced traffic; spillages in terms of m2 range from 100 (the most significant) to 1m2, with an average of 16 m2 and a volume in m3 of 1.5 in 2012 (calculated as an average litre of emulsion produced per m2 of spillage).

At Malpensa spillages of kerosene reduced (-22% compared to 2011), while at Linate remained stable.

Accidental gasoline spillages principally remained under the attention thresholds and overall were insignificant.

 

Malpensa - Spills

Malpensa - Spills 

Source: SEA

Linate - Spills

Linate - Spills

Source: SEA

Spillages of hydraulic oil related to the breakage of operational equipment. Also in this case the number of events is not directly proportional to the quantity. The issue is closely related to the characteristics of the equipment and the terminal Maintenance Department have introduced specific plans to deal with such events.

At both terminals no significant spillages took place in volume terms, as events are contained and resolved in a short period of time, according to standard procedures.

© Copyright 2013 SEA S.p.A. P.IVA 00826040156