Al Gharbia is the western region of the emirate of Abu Dhabi. This vast region spreads over an area of 60,000 square kilometers and borders with two neighboring countries of Saudi Arabia and Qatar. Al Gharbia is considered the nexus of traditional and modern Emirati society. The population of the region is expected to grow due to the different development being proposed in the area. Hence, sewage generated from this development is likely to increase.

For this reason ADSSC appointed KN Intl. to have an overview of all private and public infrastructure projects in the Western Region related to sewerage works.

Part of the scope is to overview the Umm Al Ashtan development. The project Consultant responsible for the works is M/s Dorsch. Umm Al Ashtan is a new settlement approx. 20km southwest of Bida Al Mutawa in Al Gharbia.

20 new low cost villas will be designed and another 20 villas proposed for future extension. There is no existing sewer network, therefore a new septic tank is proposed. It will have a total population of 420 capita. The scope for sewerage works includes the following:
- Sewerage collection system with diameter of OD225mm
- Total sewerage network length of 1,000m
- Maximum depth of 4m for sewer excavation
- Peak flow of 380 m3/d
- Septic tank with capacity of 87m3