Changes

*70 - 80 % coarse [[sand]]  

*70 - 80 % coarse [[sand]]  

*10 - 15 % [[topsoil]]  

*10 - 15 % [[topsoil]]  

*10 - 15 % organic soil component and [[additives]]

*10 - 15 % [[Bioretention: Filter media#Organic components|organic soil components]] and [[additives]]

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*70-80% coarse sand  

*70-80% coarse sand  

*20-30% organic soil component and additives

*20-30% organic soil components and additives

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