Gasunie is one of the biggest gas infrastructure companies in Europe. Within the company, we give safety the highest priority; it forms the basis of our license to operate. We abide by the strictest safety, health and environmental standards, both for our own employees, external contractors and the surroundings. Gasunie’s safety policy is thus characterised by a proactive approach which is designed to prevent accidents, incidents and hazardous situations.

At every Gasunie location, it must be clear in an instant what hazardous situations could arise and what emergency procedures must be put in place. The emergency exits must also be clearly visible. Good health and safety indicators can prevent unclear, annoying and even dangerous situations. Health and safety indicators (H&S indicators) make an important contribution to safe working practices and to welfare at work. Each employee (both Gasunie in-house staff and external contractors) must therefore be aware of H&S indicators and abide by them. You must never start work without the express permission of the site supervisor. Health and safety signs

Old and new icons Together with the new standard, effective since January 2013, new icons have also been introduced. The new icons will be implemented at the new Gasunie facilities. At existing facilities the old icons will remain in use, as can be seen on the photographs. They will be replaced at a later date, as the regulations do not require replacement as of yet. Below are examples of the old and the new icons. Warnings New Old Triangular sign Yellow centre Black edge Icons in black

BansNewOld Round sign White centre Red edge with slanting red line Icons in black Commands NewOld Round sign Blue centre Icons in white Fire fighting equipmentNewOld Square sign Red centre Icons in white

Rescue equipment New Old Square or rectangular sign Green centre Icons in white

Health and safety signs in practice At any location, signs indicating warnings, bans and commands are often placed together. Location sign General information about the facility. The health and safety signs that apply here, can also be found at other specific locations. Docking sign This sign gives general information about the rules and regulations regarding the tank docking zones.Specific dangers are indicated on the pipelines used. Additional information

Storage barrels and tanks Storage tanks with a volume of more than 1 m³ are identified by: Substance name Danger Symbol Pipelines: All uncoded pipelines at Gasunie transport natural gas. Coded pipelines at the facility are identified by: substance name group colour danger flow direction (when important) Hazardous substances Storage and docking facilities for hazardous substances are indicated by the general health and safety signs.

Gas cylinders Gas cylinders should have the following identifying information: colour indication UN number correct transport name danger symbols Escape routes The signs marking escape routes lead to a safe location or central assembly point, from any location at the facility.

Safety demarcation Safety demarcation is an indication or cordoning off of specific areas at the facility, obstacles or zones. A yellow-black demarcation indicates that dangerous activities are carried out within the demarcated area. It is prohibited to enter the demarcated area; only those people that have to carry out activities in this area are allowed to enter, and only after receiving express permission from the officer responsible for this area. A red-white demarcation indicates general danger. Accessing these areas is only allowed after receiving express permission from the officer responsible for this area (licence holder) Acoustic and optical signs The following sound signals can be used: Evacuation signal Fire alarm Gas alarm

Acoustic and optical signs The following optical signals can be used: Fire alarm (blue) Gas alarm (red) Warning (yellow/orange) Attention (white) Danger of suffocation (red) No danger of suffocation (green) Questions? More information? More information can be found in the CSA-38-N and the OSA-12-N documents. Do you have suggestions for improvement of the health and safety signs? You can always contact the authorities that issued your work permit or the facility manager. TAKE RESPONSIBILITY All individuals are required to check whether everything is safe before the start work. Doubts? Ambiguities? Ask for more information! Contact the authority that issued your work permit.