220 OLYMPIC BLVD VA OUTPATIENT CLINIC 2023-02-09

Stormwater Management Facility Operation and Maintenance (O&M) Manual General Location and Description of Stormwater Management Facilities On-site stormwater management facilities to be maintained include Type I and Type II catch 9 YP YP basins, yard drains, 8"to 18" PVC and D.I. closed conveyance pipes, and 6"to 8" perforated pipe french drain connections. In addition, an Oldcastle BioPod water quality unit and underground detention vault are provided as part of this development. See attached site plan for an illustration of the on-site stormwater management system. Maintaining Stormwater Management Facilities Stormwater management facilities must be properly maintained to ensure that they operate correctly and provide the water quality treatment for which they were designed. Routine maintenance performed on a frequently scheduled basis, can help avoid more costly rehabilitative maintenance that results when facilities are not adequately maintained. The Maintenance requirements of individual stormwater management facilities are included in the operations and maintenance BMPs and respective product guides below. These requirements should be updated by the owner to reflect changes and updates to these facilities. Routine Work The majority of this work consists of inspection, scheduled mowing, weed control, and trash and debris pickups for stormwater management facilities during the growing season. This includes items such as the removal of debris/material that may be clogging the outlet structure well screens and trash rack and weed control. These activities normally will be performed numerous times during the year. Minor Work ' This work consists of a variety of isolated or small-scale maintenance and work needed to address operational problems. Most of this work can be completed by a small crew,with minor tools, and small equipment. Major Work ' This work consists of large-scale maintenance and major improvements needed to address failures within the stormwater management facilities. This work may require an engineering design with construction plans to be prepared for review and approval by the City. This work may also require more specialized maintenance equipment, surveying, construction permits or assistance through private contractors and consultants.These items may require prior correspondence with City of Everett and may be subject to permits.