08. Commitment to the environment

Resource management

Principales consumos de recusros en Sacyr

Materials

Given the variety of the SyV Group’s operations, the nature and origin of the resources consumed vary widely. Comparisons of consumption levels between periods are not meaningful given the seasonality of the businesses, changes in workforce numbers at different times and the changes in the number of work centres.

In 2011, the company continued to roll out an IT tool to monitor the main resources consumed at its work centres. The data reflect a general decline in the consumption of construction materials owing to the decline in works executed in 2011.

As far as the consumption of products in Sacyr Spain is concerned, in 2011 the study of products so far not quantified has continued. This was the first year that information was collected relating to the consumption of paint, adhesives and sealants and collection bags. The results obtained were as follows:

Otros productos consumidos en Sacyr España

In Sacyr Chile, 23,940 litres of oil and grease were consumed in 2011.

Principales consumos de recursos en Valoriza (I) Principales consumos de recursos en Somague Construcción (I)

The higher consumption of all resources at Valoriza Energía in 2011, compared with 2010, owes to the full year operation of the Linares Bioelectrical facility, while in 2010 it was operational only from May on. As a guideline, the availability of this facility was 5,677 hours in 2010, and 7,798 hours in 2011.

Principales consumos de recursos en Somague Ambiente (I)

Somague Construcción’s paper consumption, mostly at its offices, totalled 69,157 kg in 2011. In 2011 saw a 32.70% fall in paper consumption compared with 2010.

In the Spain-based services area, paper consumption in 2011 totalled 50,092 kg, distributed by activity as follows:

Consumo de papel en Valoriza

Somague Construcción’s paper consumption (mostly used its offices) amounted to 100,480 kg in 2011.

Consumo de papel en Somague

Approximately 17% of the paper acquired by the Somague water unit is recycled paper.

In line with the company’s environmental policy, one of the SyV Group’s priorities is to reduce the use of resources by using recycled and/ or recyclable products. Accordingly, in carrying out its activities the Group encourages the use of recycled materials – generated internally or sourced externally – and the use of surplus materials for other purposes.

We highlight the following environment-related practices undertaken by the SyV Group in its construction activities in 2011:

• Reuse of concrete discharge as filler; concrete tanks are cleaned out over containers. The containers are emptied when full of set concrete. The concrete is then demolished and used as filler.

• Reusing excess wood from formwork and steel bars for use in: signposts for information signs for tank cleaning and safety, access stairways and railing, signalling at construction sites, pedestrian crossings for employees at sites, etc.

• When there are surplus structural steel rods for certain structures, these are used to mark off the different areas of a site: for example, stopper fencing.

• Reuse of structural and geotextile steel to make sediment containment barriers.

• Reuse of material obtained from the road surface milling works in the execution of embankments, paving subbase, in the preparation of tracks and provisional site detours, etc.
Occasionally, projects stipulate that this kind of material has to be transferred to a landfill. However, whenever possible it is always proposed that this kind of material be reused in the works.

• Reuse of materials deriving from blasting to construct stone fill.

• Reuse of materials deriving from excavation in building access and work platforms, filling in of ditches, etc.

• Acquisition of recycled aggregate recovered from waste concrete and paving demolition.

• Acquisition of steel containing 94-98% recycled material.

Puente atirantado. Ronda sur de Talavera. Toledo

For example, the SyV Group applied the following practices in the provision of its various services:

• Used engine oil is mixed with new oil for greasing company-owned machinery wherever maintenance requirements permit such reuse.

• Acquiring recycled resources. 33.68 % of the collection bags used in building cleaning and maintenance in 2011 were recycled.

• Reuse of millings produced by road repairs to adapt site pathways and stockpiling surfaces; approximately 5,497 m3 have been reused.

• In the road maintenance and conservation segment, trees are pruned on the road margins, reusing part of the material pruned for fertilising the area. It is estimated that 370 m3 of this material have been used.

• Composting work using material retrieved from scrub clearing, felled tree stumps, pruning waste, etc., as an organic contribution to soil.

Within the environmental services area, it is important to distinguish between materials which are recovered as the result of good environmental practices carried out in our work centres and others which form part of the activities we carry out.

Of the former, materials recovered as a result of good practices, we highlight the waste generated by our processes which is fed back into the same processes in some way, saving on the consumption of raw materials.

We would mention the recovery of leachates produced by composting and landfill processes in some of our waste treatment plants. In these cases, leachates are recirculated and readded to the process to provide humidity for the fermenting organic matter, thereby eliminating an important part of this waste and saving on water consumption. This is a common practice at the Aranda de Duero (Burgos), Arenas de San Pedro (Ávila) and Abajas (Burgos) facilities.