Biofilters

SAVE TIME, MONEY AND MATERIAL.  COMPLY WITH BEST PRACTICE

• Metropolis specialises in the back filling of biofilters- we do dozens of them a year.
• Many of the most prolific biofilter construction companies utilise Metropolis’ stone slinging material placement methodology.

The Advantages of Metropolis Methodology

• Our methodology saves our clients time and money.
• The drainage, intermediate and filter layers are placed quickly and evenly.
• There is less trimming and most biofilters usually only require one process of smoothing the top layer of the filtration layer.
• Reduced compaction means higher hydraulic conductivity.
• Because our methodology greatly reduces heavy traffic within the basin, there is far less inter-layer contamination of the material.
• We avoid the construction of ramps and stands within the basin which leads to less contamination and non-productive time constructing, removing them and the contamination clean-up.
• When contamination and compaction issues are accounted for, our clients save on 5-10% of material when compared to traditional outdated methods.
• Our method follows established best practice (Adoption Guidelines For Stormwater Biofiltration Systems) in that:
  • No heavy equipment on pipes.
  • No layer intermixing.
  • Heavy machinery does not enter basin. Avoids over-compaction.