Laserfiche WebLink
1 <br /> IRefer to Appendix A of the Stormwater Site Plan (SSP)for detailed drawings of the storm <br /> drainage structures. <br /> I <br /> The on-site storm system requires regular maintenance.The conveyance system must <br /> I be inspected after large storm events. Leaves and debris shall be swept clean of the <br /> catch basin grates. Sumps of the catch basins must also be cleaned periodically. YMCA <br /> of Snohomish County will be the entity responsible for the maintenance of the onsite <br /> storm system.The address and contact information for YMCA of Snohomish County is: <br /> YMCA of Snohomish County <br /> 2720 Rockefeller Avenue <br /> 11) Everett, WA 98201 <br /> 425.258.9211 <br /> I <br /> The maintenance standards are used as inspection forms for the system and its <br /> p Y <br /> associated components. Record the date each time an inspection is completed and note <br /> I any problems and actions taken, records of inspection and maintenance must be kept <br /> for five (5)years. A sample maintenance log is provided at the end of this document. <br /> Keep completed forms with the Operations and Maintenance Manual at the office at all <br /> times.YMCA of Snohomish County shall keep the Operations and Maintenance Manual <br /> available for maintenance personnel. County staff may request to review the <br /> II maintenance forms as a part of their inspection process. Some components or facilities <br /> do not need to be looked at every time an inspection is conducted. Use the suggested <br /> frequency at the left of each item as a guideline for activities to be completed with each <br /> 1 inspection. <br /> A brief description of each stormwater facility and its function is provided below: <br /> • The bioretention cells are shown in Appendix A of the SSP. The cells are designed <br /> to collect stormwater from the pollution generating impervious surfaces and <br /> I treat by filtering the water through its soil media. <br /> • A catch basin's function is to collect, convey, and temporarily store stormwater <br /> sheet flow or stormwater conveyance.The catch basin is a concrete or plastic <br /> ii box or cylinder that will have a grate to allow stormwater to flow into the drain. <br /> • Conveyance pipes are located underground and are connected to catch basins. <br /> Conveyance pipes use gravity to convey stormwater downstream. <br /> • The underground infiltration facilities are designed to collect and infiltrate 100% <br /> of the runoff in the continuous model by storing it in chambers and porous rock <br /> it until it infiltrates into the natural soil. <br /> • The treatment facilities are designed to collect stormwater from pollution <br /> generating impervious surfaces and treat by filtering the water through <br /> cartridges with filter media. <br /> I <br /> 1 BCRADESIGN.COM 2 <br />