35 SE EVERETT MALL WAY BASE FILE 2018-01-02 MF Import

28. The options for treatment of runoff from hydrauli,;ally-connected pavement are: a) an infiltration basin, if suitable soils exist on the site; b) a wet pond; c) a constructed wetland; d) a Stormwater 360 StormFilter, with pretreatment; e) an alternative storm water treatment technology de=med, by the City of Everett, to be technically equivalent to the above options. 29. The required storm water treatment volume for wet ponds is the volume of developed runoff from the 6-month, 24-hour storm. City standards for wet ponds allow a maximum of 85% of this volume to be provided as underground dead storage in a wet vault or tank. A minimum of 15% of the storm water treatment volume, however, must be provided in an open -to -the -air vegetated treatment cell. Please see the City's Stormwater Management Manual, Chapter 3-3 for more information. 30. Storm water detention is required when 5,000 square feet or more hydraulically -connected impervious area is created by a project. If an area of the site is currently graveled: and 31. If suitable soils exist on the site, underground infiltration systems (e.g. infiltration trenches) or surface storm water infiltration systems (e.g,, splash blocks, pervious pavers, or surface storm water infiltration systems (e.g., splash blocks, pervious pavers, or surface ponding areas and/or swales) may be used to avoid creating hydraulically -connected impervious area from a storm water detention standpoint. Section 3-2.2 of the City's Stormwater Management Manual lists site and design criteria that must be met. 32. From a storm water detention standpoint, for an impervious area to be considered hydraulically disconnected, storm water runoff from the 100-year, 24-hour storm must be fully retained and/or infiltrated — without resulting in significant potential for adverse effects from the infiltrated water (such as slope saturation or migration to crawlspaces and/or basements). However, if the on -site soils cannot support full infiltration of the 100-year, 24-hour storm, partial infiltration may still be feasible to meet allowable storm water release requirements. 33. All storm water facilities shall be designed in accordance with applicable City standards and/or design policies. 34. An NPDES (National Pol;utant Discharge Elimination System) permit, administered by Washington Slate's Department of Ecology, will be required for clearing and grading activities on this site area disturbed by land alteration activities is greater than or equal to one acre. 34 Parking must be per City Zoning Code and City Design and Construction Standards and Specifications. For the 2,000 square foot bank and 7,488 square feet of retail space proposed, a minimum of 30 parking stalls is required. 35. A pedestrian circulation system for the site must be approved by the Planning Director and Traffic Engineer prior to the issuance of any building permits. Walkways must allow pedestrians and wheelchairs to gain easy access from sidewalks and bus stops to building entrances through the use of paths which are physically separated from vehicle traffic and maneuvering areas. (See the city's