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Establishing and Operating ECOSAN System in New and Existing Residential Areas173.3 Transport Cost for Black Water System3.3.1 Typical Collection ScheduleThe main component of the black water system operation is the transport of theblack water from the communal storage tank to the sludge treatment facility atMatang, west of Kuching. A typical daily schedule has been worked out based onthe following assumptions:- It is assumed that the trucks are in operation for about 10 hours per day andthe number of working days per year is 312.- It is assumed that the average distance between tank and sewage treatmentplant in the study area is 10 Km. This distance will allow desludging of blackwater from an average of 8.5 communal tanks i.e. 85 m 3 of sludge per day.A set of typical daily schedules for a tanker truck transporting of black water ispresented in Appendix 3 for a range of average distances between tank andsewage treatment plant.3.3.2 Truck Operating CostsThe truck operating costs have been calculated using the following assumptions:- The vehicle is a 3-axle 10-wheeler tanker with a capacity of 10 m 3 . The 10 m 3has been chosen as a typical size as it will be able to access most areasincluding existing town areas. It is possible to produce a tanker truck with acapacity of 12 m 3 and still be within the legal weight limit for axle loads. Thetransport costs per m 3 for a 12 m 3 capacity tanker truck is about 10 percentlower than for a 10 m 3 capacity tanker truck.- The cost of the tanker truck with desludging equipment is RM 400,000 basedon recent quotations obtained in Kuching. The economic life of the truck is 10years. Depreciation calculated as 50% time-based (RM 200,000 over 10years) and 50% km-based.- Interest rate is 6% per annum- Insurance cost is RM 5,000 per year- Road tax is RM 1,200 per year- Fuel cost is calculated based on a diesel price of RM 1.09 per litre and anaverage fuel consumption of 2.7 km / litre.- Tyre consumption based on three axles with ten wheels. The average life of atyre is estimated at 45,000 km and the cost is RM 600 per tyre- Tanker maintenance cost is estimated to be RM 0.27 per truck-km equal toapproximately 4 percent of the capital cost of the vehicle per year.- Overhead cost is calculated to be RM 34,000 per year per truck based on thepresent operation of tanker trucks in Kuching. The overhead costs cover 1/6thUEMS_TEC_02_53_Final ECOSAN Costing Report_280905.