Emptying Interceptors

Overview of Service


Interceptors are designed to allow only water to drain from the outlet, trapping pollutants such as fuel oil and solids within the confines of the interceptor. The accumulation of oil, silt, debris and other miscellaneous contaminants within an interceptor increases the risk of forecourt flooding and pollutants contaminating sewage systems or watercourses.


The specific guidelines provided by the Environment Agency: Pollution Prevention Guidelines 3 (PPG 3) details how your interceptor should be maintained. PPG 3 suggests that a 6 monthly schedule should be in place to:


• Physically inspect the integrity of the interceptor and all mechanical parts
• Assess the depth of accumulated oil and silt
• Service all electrical equipment such as alarms and interceptor management systems
• Check the condition of any coalescing device and replace it if necessary
• Keep a detailed log of when the separator is inspected, maintained, emptied and serviced.


SWR assist our customers in meeting these requirements by implementing a regular interceptor service schedule to ensure your interceptor is in good working order and oil and solids are kept to a minimum. The service will not only ensure the guidelines are followed but will also you to budget for accurate maintenance costs.


Customer experience


Once we have agreed a suitable servicing frequency, SWR will make contact with your site representative one week prior to the agreed service date to ensure the area is clear and to discuss the service. Any additional jobs such as gully cleans can be requested at this time.


Our trained and certified operative will arrive on site, park safely and sign in with your site manager. The contents of your interceptor will then be transferred into the vehicles tank via a vacuum pump.
Once full, the vehicles tank is allowed to settle until the oil and solids separate from the water. The remaining water is called ‘grey water’.


During this time, the operative will clean the interceptor and manholes using the vehicles jet hose and onboard water supply. The grey water is then decanted out of the vehicles tank into the cleaned interceptor, a process known as re-charging. The oil and solids are then removed from site and disposed of in accordance with hazardous waste regulations.


A detailed report will be left with our customers after each interceptor service, which should be stored on site in order to show that you are complaint with the Environment Agency Pollution and Prevention Guidelines.