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STORM DRAINAGE OPERATIONS & MAINTENANCE MANUAL <br />FEBRUARY 22, 2022 <br />COMPASS HEALTH <br />INTRODUCTION <br />7 <br />This Operations and Maintenance Manual provides detailed information and guidelines on the <br />proper maintenance of the on -site storm drainage system. The Manual has been based on the <br />requirements of the 2019 Department of Ecology Stormwater Manual (DOE Manual). <br />Inspection and maintenance requirements may change in the future, and this manual does not <br />exempt this facility from any future changes in inspection and maintenance requirements. The <br />record documents should be consulted during inspection, maintenance, and repair activities; a <br />copy of the record documents is kept at City of Everett as well as on -site. <br />DRAINAGE NARRATIVE <br />The site is located with a combined sewer area in the City of Everett. Drainage from the roof is <br />collected internally to the building and directed to a detention system located below the <br />parking garage area. The street level surface runoff is collected in a yard drain and catch basins <br />conveyed to the detention system. The controlled release is then directed to the sanitary <br />sewer. <br />FACILITY MAINTENANCE RESPONSIBILITY <br />Compass Health and its successors and assigns are the responsible party for maintenance of the <br />private storm drainage systems. This includes all storm systems that lie within the property <br />boundary, including the yard drains and storm pipe, the detention system and the flow control <br />structure. <br />FACILITY DESCRIPTIONS <br />The following are drainage items in this system and a description of their function: <br />Storm drainage pipe: Conveys runoff underground from one point to another. On this site, <br />storm drainage piping ranges in size from 6-8" PVC for roof drain collectors and catch basin <br />connector pipes. <br />Catch Basins: A structure used to collect surface water and direct it to a storm drainage pipe. <br />They can also be used junctions betweens runs of storm drainage pipe. Catch basins are larger <br />concrete structures, rectangular or round. <br />MAINTENANCE REQUIREMENTS <br />The text below provides general guidelines for the maintenance of facilities and a description of <br />specific requirements for on -site facilities. Where applicable, the standard DOE Manual <br />maintenance standards are referenced. The DOE Manual can be located on-line for reference at <br />the Department of Ecology website. <br />PAWork\Projects\2021\21-056 Ankrom Compass Health\CE\DOGS\operation and maintenance manual\21-056 Compass Health O-M Manual.docx DWH/srm <br />