Table 7.4 Potential Contaminative Areas/Activities in the Citybus Depot

Area/Activity	Site Descriptions	Potential Contaminants
Bus refuelling area with underground fuel storage tanks	Diesel fuel which is stored in the underground fuel tanks (2 tanks with each capacity of 45,460 litres) is used by the vehicles of City bus. Five fuel dispensers were noted and no apparent stain was observed on the concrete paved ground.	Petroleum product
Diesel fuel interceptors	Three interceptors are located adjacent to the underground fuel storage tanks. All possible spillage during bus refuelling is collected through a series of channels into the fuel interceptor.	Petroleum product
Vehicle washing facility	Mild cleaning solvent is used for vehicle washing. The water used is collected by the drainage channels around the car washing facilities and recycled by using the built-in recycling unit.	Petroleum product washed out from buses