1 Risk identification, assessment and prevention

1
(1) Every Discharge Management Plan shall include—
  • (a)location details of the offshore installation and of the field to which the application relates;
  • (b)up to date and accurate drawings or plans showing the general arrangement of the installation, in particular, the places and systems associated with the storage or transfer of fuels including tank capacity, filling arrangements, isolation valves and drainage systems highlighting the critical isolation points and the most likely sources of any spill that may result in a pollution incident;
  • (c)details of the proposed operations at the installation;
  • (d)particulars of all oils stored at the installation including characteristics, specifications, material safety data sheets and the maximum volume for each oil to be held on the installation;
  • (e)information on the oils produced by the installation, including1
    • (i)physical properties including pour point, viscosity, density, API gravity, wax content and asphaltene content measured by a method approved by the Chief Executive Officer;
    • (ii)weathering information including evaporation rates, emulsion-forming tendencies and changes in oil properties measured at 12, 24 and 48 hours by a method approved by the Chief Executive Officer; and
    • (iii)effectiveness on selected dispersants as required by the Chief Executive Officer on fresh oil and oil weathered for 12, 24 and 48 hours measured by a method approved by the Chief Executive Officer;
  • (f)information on the likely fate of spilled produced oil taking into account weathering characteristics and the likely movement of any oil spilled from the installation;
  • (g)a detailed description of all the processes and activities which present a risk of pollution from an oil spill, with a list of specific procedures to reduce the risk of an oil spill;
  • (h)a detailed description of all identified potential environmental impacts, including any possible social, cultural and economic implications that may result from any operational discharges or spill of oil or other substances from the installation.
(2) The Discharge Management Plan of an offshore installation shall also include information about every harmful substance that is eco-toxic in the aquatic environment.
(3) In fulfilment of subclause (2), the Discharge Management Plan shall include, in a form acceptable to the Chief Executive Officer, the information set out in Appendix 4 of this part, if the following is held on an offshore installation—
  • (a)20 litres or more of a harmful substance that is eco-toxic in the aquatic environment; or
  • (b)100 litres or more of any other harmful substance.
(4) The Discharge Management Plan for an offshore installation shall explain how the production water, displacement water, offshore processing drainage and any other water emanating from the well product, will be managed to avoid any risk of environmental impacts as identified in clause 1(h), including—
  • (a)selection of the least hazardous chemicals to minimise the toxicity of that water; and
  • (b)if re-injection of production water (the preferred option in all cases), is not to be used, the options to be used to reduce the volume of production water discharged into the marine environment; and
  • (c)the method to be used to monitor the concentration of oil in production water; and
  • (d)the procedure by which oil content and volume of production water discharged is to be recorded and reported in accordance with regulations 35 and 45.
(5) The Discharge Management Plan for an offshore installation shall describe measures to be taken to avoid environmental impacts from discharges during commissioning and decommissioning of the installation other than those identified in clause (4).
(6) The Discharge Management Plan for a controlled offshore installation shall include a detailed description of the environmental monitoring programme to be undertaken in accordance with regulation 47.
1To inform a national response in the event of a spill.
1To inform a national response in the event of a spill.