Boskalis jaarverslagen 2011

Fuel and energy consumption

In 2011 we worked hard to optimize the reporting on the fuel consumption of our fleet and the energy consumed by our office organization and to expand it with the data from SMIT.

At present the CO2 emissions of our fleet are based on absolute fuel consumption and not on relative emissions per production unit. Due to the absence of a clear standard the annual consumption reports are difficult to compare. A complex set of factors come into play here. Our fleet consists of different types of vessels and the fuel consumption of a large trailing suction hopper dredger can hardly be compared to that of a tugboat. The purpose of the former is to suck up sand, transport it and unload it, whilst the latter tows or pushes large vessels. The deployment of older or more modern vessels and the utilization rate of the fleet also have a bearing on fuel consumption in a given year. In addition the nature of the projects can also provide a distorted picture; for example, a cutter suction dredger will have much lower energy consumption during a year involving a lot of work in softer soil compared to a year working on projects with predominantly hard soil. This means that higher or lower fuel consumption by our fleet in a given year does not automatically equate to less or more efficient deployment. For this reason we do not consider it sensible to set a quantitative target for annual fuel consumption at this time.

Our aim is to establish an industry standard and we are in talks with others in the sector to achieve this. We are looking at whether we can arrive at a workable model by linking carbon emissions to the type of working conditions. The second step will be to make this model uniform. Given the complexity of the subject we expect that introduction is still several years away. In the meantime we will continue to report on our fuel consumption, our research and targeted measures taken to reduce our emissions.

Carbon dioxide emissions in 2011

Based on the results of a case study in 2010 (see page 61 of our 2010 CSR report) we have decided not to report on the fuel consumption of our dry earthmoving equipment, because the vast majority (around 95%) of our carbon dioxide emissions are produced by our fleet. The tables below show the fuel consumption of our fleet as well as the amount of energy consumed by our office organization.
In terms of both fleet and office organization associate companies are consolidated pro rata to the participating interest we hold.
Boskalis fleet. Compared to 2010 carbon dioxide emissions declined by 15%. Around one-tenth of the decline is due to several ships being decommissioned (see the article Environmentally friendly equipment). The remainder is attributable to lower equipment utilization rates (hoppers from 43 to 39 weeks and cutters from 27 to 19 weeks).
Boskalis offices. In 2011 we further fine-tuned the reporting scope with regard to the offices. In addition we now report only on permanent offices, which has resulted in a more stable office base. As a result of this fine-tuning a number of temporary project offices, which were included in the reporting in 2010, are now out of scope.
Lamnalco fleet. Overall emissions rose by around 1% compared to 2010. However, the number of vessels included in the reporting increased in 2011. On a like-for-like basis in terms of fleet composition consumption in 2011 was down 6% on 2010, with the decline attributable to lower equipment utilization levels.
Lamnalco offices. Scope and consumption comparable to 2010.
SMIT fleet and offices. We are reporting on the consumption of the SMIT fleet and office organization for the first time this year.

Added to My report add to My report Source: CSR Report 2011, Our environmental performance, page 52