Licence for Effluents
According to the "Water Pollution Control Ordinance", any person discharging commercial or industrial waste water (including those produced by car washing shops or vehicle repair workshops) in a Water Control Zone should apply for a discharge licence from the Environmental Protection Department. In determining the conditions of a discharge licence, the Environmental Protection Department will refer to the "Technical Memorandum - Standards for Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters", the volume and the pollutants of the waste water.
Waste water from car washing shops or vehicle repair workshops must be connected to sewer leading to waste water treatment facilities.
The size of any waste water control facility should correspond to the maximum discharge rate, and should be able to hold waste water for 20 minutes. You can hire experienced contractor to design one for you.
Chemical Waste Producers
According to the Waste Disposal (Chemical Waste) (General) Regulation, all materials classified as "chemical waste", including solid and liquid materials, must be handled properly.
In general, vehicle repair workshops produce the following chemical wastes : spent lubricating oil, wiping cloths or cleaning rags stained with lubricating oil, and sand, waste refrigerants, organic solvents and their containers, waste paints and their containers, used oil filters with lubricating oil residues, waste batteries, engine coolants, brake linings with asbestos.
Vehicle repair workshops producing the above chemical wastes in their operations must registered as chemical waste producers with the Environmental Protection Department. Chemical wastes must be properly stored, labeled and packed. Finally, they must be collected by licenced chemical waste collectors to approved treatment facilities for proper disposal. Records of delivery must be kept for 12 months and be available for inspection by law enforcement personnels.