1. Oasen Security: above and below ground level Thom de Kort Lisbon March 2009

2. Oasen, a Dutch water company Security, our principles Security projects above ground level Security projects below ground level

3. Drinking water company Oasen 33 municipalities

4. Groundwater is the source of our water.

5. 5 Oasen in numbers: customers 317.000 Customers Water production 47 million m3/yr per person: 45 m3/yr 7.200 Company’s

6. 6 Oasen in numbers: company 250 personnel 21Stations 1 HQ

7. 7 4000 km of pipes

8. Purification plant De Laak 8

9. Renovation Purification Plant Rodenhuis 9

10. Softening our water 10

11. Oasen, a Dutch water company Security, our principles Security projects above ground level Security projects below ground level

12. Softening our water 12 Protection of water quality No access for strangers Distribution network under pressure Awareness of personnel VEWIN regulations / good housekeeping Principles

13. Oasen, a Dutch water company Security, our principles Security projects above ground level Security projects below ground level

14. Security above ground level: example 14 A pumping station before renovation of Security facilities

15. 15 During the renovation of the security facilities

16. Pilot: pumping station Gorinchem 16

17. 17

18. Oasen, a Dutch water company Security, our principles Security projects above ground level Security projects below ground level

19. ’’ 19 Pressure sonde EGV sonde Pilot online measurements

20. 20 Pilot online measurements

21. Pressure regulated valve 21

22. Conclusions Work towards basic level on all locations Experiments with advanced security Pilots online measurements Sharing knowledge in sector 22