Infiltration Systems Maintenance Criteria
Observation well should be installed in infiltration trench
Extreme care should be taken during construction stage
- no coverage with impermeable surface
- avoid sediment entry
- do not use as sediment control device
- avoid compacting subsoils during construction
OSHA standards for trench excavation
Underdrain pipe system is recommended for de-watering where marginal soils exist
Direct access for maintenance and rehabilitation should be provided
Notes:
One source of failure is from compacted soils below infiltration practice that occurs during construction of the practice itself. Provisions need to be incorporated at the design stage to ensure that contractors know that the must excavate the practice without compacting subsoils.