Total hazardous and non-hazardous waste
|Total hazardous and non-hazardous||126.51||296.48||661.50||306.04||626.48|
Total regulated hazardous waste quantities by disposal method
|Incineration or used as fuel||0.00||2.38||112.24||20.25||204.51|
Total regulated non-hazardous waste quantities by disposal method
|Incineration or used as fuel||5.37||62.49||30.66||7.56||27.79|
Hazardous and non-hazardous waste
|United Kingdom hazardous||0.24||0.29||0.19||0.49||2.98|
|United Kingdom non-hazardous||104.50||108.90||137.21||118.12||103.78|
Note: Data has been reported for countries where waste has been generated. Similarly, data has been reported for applicable waste disposal methods that have been used.
Hazardous waste: all waste that is defined as hazardous, toxic, dangerous, listed, priority, special, or some other similar term as defined by an appropriate country, regulatory agency or authority. We use the European Union (EU) definitions and waste codes.
Non-hazardous waste: industrial wastes resulting from Company operations, including process and oil field wastes (solid and liquid) disposed of either on-site or off-site. Includes, refuse and other office waste, commercial (e.g. retail) or packaging-related wastes. Excludes hazardous waste as defined above.
Disposal method: the method by which the waste is disposed. This is split into the following categories in line with GRI reporting requirements: reuse, recycling, composting, incineration, landfill, on-site storage and other. Waste data, including information on disposal method, is provided by our waste disposal contractors where applicable, or by contractors who are responsible for waste generated during short-term operations. We use the EU definitions and codings.
We generate waste during rig, marine vessel and shore-based operations, as well as from our offices in the UK and other locations.
Waste from field based operations: waste generated during field-based operations (including offshore waste - except where offshore treatment is allowed such as waste incineration under the International Convention for the Prevention of Pollution from Ships (MARPOL)) is transferred to shore-based waste disposal facilities and waste transfer notes are used to record and track each transfer as part of our ‘Duty of Care’. Waste figures are submitted to Cairn at the end of each month by the vessels themselves (in the case of short-term operations such as seismic) or by the waste disposal contractor (in the case of longer-term operations such as current drilling operations in Senegal). This data is then checked and entered into our database, split by hazardous/non-hazardous and by disposal method.
Waste figures are reported in tonnes. We ask our contractors to weigh waste wherever possible and report by mass (tonne, kg). Where this is not possible, tonnage is calculated by multiplying the volume of waste by a conversion factor. We provide contractors with a set of standard conversion factors from Waste & Resources Action Programme (WRAP), a non-government organisation working with UK governments, the EU and other funders, to help deliver their policies on waste prevention and resource efficiency (see www.wrap.org.uk).
Office waste: waste data is collected from our offices at the end of each year. This covers all types of waste including general office waste, controlled waste and recycling waste, e.g. paper and toner cartridges. Figures for Cairn’s head office in Edinburgh are received from the waste contractors that service the building, and are partly estimated. Figures for Cairn’s Stavanger office are obtained from the building managers. For both these offices some figures are calculated as a proportion of the overall building. For other offices waste figures are estimated using per person per month Edinburgh office figures.
Estimates and uncertainties
- There is a degree of uncertainty in the volumes of waste measured and in the conversion factors used to convert volume to tonnes and these will arise from the method used.
- Waste figures for offices are, for the most part, estimated as a proportion of the overall building or using per person per month Edinburgh office figures.
Water effluent and discharges to water
Water effluent discharged to surface
Oil discharged in water effluent to surface
(tonnes/mg per litre of water discharged to surface/mg per million tonnes of hydrocarbon produced)
Note: There has been no hydrocarbon production since 2010.
Note: Water effluent data includes domestic water effluent discharged from vessels but not from taps in offices. Domestic water effluent discharge from vessels is usually based on estimation as vessels do not often have discharge metres.
Note: Data has been provided for individual countries where there has been relevant water consumption or effluent and discharges to water.