How Do I Use My Drainage Plan For Drain and Interceptor Servicing?

Over the last few weeks, our blogs have been explaining how you can use your drainage plan.  We have discussed its use when planning operations (read here) and for emergency planning (read here).  To finish our series, this blog will consider how your drainage plan can inform your drain and interceptor Planned Preventative Maintenance (PPM) schedule.

Location of Drains and Interceptors

Interceptors, sometimes called separators, are large underground tanks fitted on the drainage system designed to prevent oil from leaving your site.  For more information on interceptors, read our fact sheet here.  An accurate drainage plan will highlight all interceptors on your site on the foul or surface water drainage systems and indicate the areas that the interceptor services, for example, fuel storage or a vehicle wash.  As a general guideline, interceptors should cover areas with a risk of oil contamination such as car parks, vehicle maintenance areas and refuelling areas.  When you have consulted your drainage plan to identify your interceptors, you should check that they are identifiable and easily accessible at all times.  You may want to consider painting them with an I, or placing signs on them so their location is clear to everyone on site.

Drain and Interceptor Maintenance

Interceptors must be regularly checked and serviced to ensure they remain in operable condition and continue to provide pollution control.  At this service, they should receive a physical inspection for integrity, an assessment of oil and silt accumulation and a check/ service of the associated electrical equipment.  If necessary, the interceptor should be cleaned of accumulated oil and silt.  The frequency of inspection, servicing and emptying will be dependent on site arrangements and the activities in the area.  This could be every three, six or twelve months.  For example, an interceptor that services a heavily used fuel island should be serviced more frequently than an interceptor servicing a small car park.  Your drains will also need to be checked and, if necessary, cleaned.  This can often be carried out at the same time as interceptor servicing, but should be considered even if you don’t have interceptors on your site.  They should be clear and free-flowing at all times and free of debris.

Site Arrangements

Your drainage plan will indicate any areas that are not covered by an interceptor.  If there are any areas not covered, depending on the risk, you may want to consider installing an interceptor or moving at-risk activities from that area.  Checking the location of interceptors on your drainage plan is also essential when considering resituating activities or storage areas.

As we have demonstrated through this blog series, an accurate and easy to understand drainage plan is an essential document for operational efficiency and management.  It can help you to plan your Planned Preventative Maintenance (PPM) schedule and ensure that drains and interceptors remain in operable condition and control pollution.  Click here for more information on drainage plans.