|Infiltration trench<ref>SWAMP, 2002, Performance Assessment of a Swale Perforated Pipe Stormwater Infiltration System, TRCA, Toronto Ontario</ref>||2 years||Silty sand with clayey silt deposits||4:1 (approx.)||1||89 | |Infiltration trench<ref>SWAMP, 2002, Performance Assessment of a Swale Perforated Pipe Stormwater Infiltration System, TRCA, Toronto Ontario</ref>||2 years||Silty sand with clayey silt deposits||4:1 (approx.)||1||89 |