7008 COLBY AVE 2024-11-01 - Laserfiche WebLink

202312130375 Document:COVENANTS Rec: $214.50 Page-11 of 12 Record Date:12/13/2023 3:36 PM Snohomish County,WA Downspout Full Infiltration System Inspections should occur every year prior in early October and after the first significant rainfall even of the fall(>0.5"in 24-hours). Maintain as needed based on conditions observed. Trench should be drained within 24-48 hours after the rain event has stopped. Some water located in the bottom'of the pipe is normal. Maintenance Standing water and frequent overflows is generally an indicator that the BMP is not infiltrating adequately. The principal maintenance objective is to prevent clogging of soils, pipes, and rock-filled temporary water storage areas within infiltration facilities. Clogging is associated with fine sediment, trash, and other debris and can lead to premature facility failure. Maintaining upstream catch basins, pipes, and any associated settling bay can extend the functional life of the facility.The removal of sediment and debris is dependent on the rate at which loading occurs. Pedestrian, bicycle, and machinery traffic can cause sail compaction, poor vegetation growth, side slope slumping, and lead to premature facility failure. Heavy machinery is especially prone to causing soil compaction and should not be used in, or on top of these BMPs. Machinery fluid spills within an infiltration facility can cause groundwater contamination. Care should be taken when using machinery in and around this environment. The most common tool for cleaning closed infiltration facilities is a truck with a tank and vacuum hose to remove sediment and debris from the facility.