8925 AIRPORT RD MUKILTEO SCHOOL DISTRICT 2018-01-02 MF Import

5. Development of the site must not adversely affect the hydrology of the site's vetlands. The quantity and rate of water entering the ��etlands must be determined for current conditions. Under developed :onditions, a similar rate and quantity of roof drainage or treated runoff must continue to be discharged to the wetland(s). Prior to application for building permits and plan review by the Public Works Department, a characterization of the hydrology of the wetlandsCs) on or adjacent to this pro�ect that may be affected by the develoFment of this site must be submitted to and approved by the Planning Department. (SEPA Water Policies) 6. Discharge of water to wetlands should mimic natural discharges as ' much as is feasible. Where poiat source discharges do not occur, this type of discharge should be avoided. Techniques that result ia dispersed discharge, such as dispersion trenches or buried perforated pipe located at wetland buffer edges, can be used to mimic naturally occurring sheet flow into wetlands. �SEPA Water Policies) 7. Site topography will be needed to determine whether the site drains to more than one drainage basin or sub-drainage basin. Natural draiaage patterns, particularly regarding the proportion of atormwater runoff discharged to different sub-basins, must be retained. (SEPA Water Policies) 8. On-site detention is required per City standards. <SEPA Water Policies) 9. If the future use of the site will result in the potential for accidental spills of chemicals, including oils or fuels, to the City's sanitary sewer, an Accidental Spill Preveation Plan wi21 need to be prepared per the direction of the City's Iadustrial Pretreatment Program. (SEPA Earth and Water Policies) 10. All chemicals or producta of a hazardous or tozic nature that may be used or stored on the s3te must be stored under cover and isolated from the storm drainage system. (SEPA Earth and Water Policies) 11. Flrture uses of the site must c�mply aith all City policies and � regulations preventing contamination of surface waters, including ,� Ordinance 1750-90, the Surface Water System Ordinance, and subsequent updates to the ordinance. (SEPA Farth and Water Policies) 12. The bus wash area must be hydrologically isolated from the storm drain system. The City of Everett's Industrial Pretreatment Program should be contacted about requirements for discharging wash �rater to the sanitary sewer. (SEPA Earth and Water Policiea) . 13. A crater main will need to be extended to serve this site. The Fire Marshal needa to provide Public Works with the required fire flow so the main can be properly sized and the linear footage of water main eztension can be determined. (SEPA Watez Policies) -5- 1