The facilities regulations § 40

§ 40 Open drainage systems

Facilities shall be equipped with open drainage systems that can collect and divert oil and chemicals so that the risk of fire, harm to personnel and pollution is reduced.
The installation shall be designed such that any discharge of oil and chemicals results in the least possible pollution of the marine environment and such that the requirements in Chapter XI of the Activities Regulations are fulfilled.
Section last changed: 01 January 2011

Open drainage systems as mentioned in the first subsection, means systems that collect liquid, but are not pressurised.
The discharge point for drainage water should be located such that potential discharges as mentioned in the second subsection, have the least possible impact on the marine environment, and such that discharges are not a nuisance to personnel on vessels near the facilities.
As regards the design of open drainage systems, the following standards should be used in the area of health, working environment and safety: NS-EN ISO 13702 Chapter 9 and Appendix B.4, NORSOK S-001 Chapter 9 and P-002 Chapter 28. In addition, NORSOK S-001 Chapter 24 should be used for mobile facilities.