Changes

* Operation and maintenance (O&M) cost estimates assume annual inspections, removal of trash and debris twice a year, and removal of sediment from pretreatment structures annually. Verification inspections are included every 5 years to confirm adequate maintenance, and every 15 years to confirm adequate drainage performance through in-situ chamber system water level monitoring during natural storm events.

* Operation and maintenance (O&M) cost estimates assume annual inspections, removal of trash and debris twice a year, and removal of sediment from pretreatment structures annually. Verification inspections are included every 5 years to confirm adequate maintenance, and every 15 years to confirm adequate drainage performance through in-situ chamber system water level monitoring during natural storm events.

* Hydrodynamic separators ([[Oil and Grit Separator|oil and grit separators]]) and isolated chamber row as [[Pretreatment| pretreatment]].

* Hydrodynamic separators ([[Oil and Grit Separator|oil and grit separators]]) and isolated chamber row as [[Pretreatment| pretreatment]].

* Infiltration chamber system length of 5 metres.

* Infiltration chamber system length of 5 metres and composed of 22 individual chambers.

* Infiltration chamber system height of 0.762 metres.

* Infiltration chamber system height of 0.762 metres.

* 50 mm dia. clear stone aggregate bedding depth (below and above chamber system) of 152 millimetres.

* 50 mm dia. clear stone aggregate bedding depth (below and above chamber system) of 152 millimetres.