5801 23RD DR W BASE FILE 2016-01-01 MF Import

17. A traffi. mitigation fce of$74,500.00 is required prior to issuance of any permits. 13. E;ity standards require treaunent of storm water runoff from hydraulically-connected pavement prior to discharge of the storm «�ater from the site, or ro a stream, ::�tland, or underground infiltration system. 19. Storm water treatment is required when 5,000 square feet or more of hydraulically- connected pavement is creaied and/or redeveloped by a project. Treatment of storn� water runoff from hydraulically-connected pavement must occur, per City standards, prior to discharge of d�e srorm water from the site, or to a stream, wedand, or underground infiltration system. • If suitable soils exist on the site, surf.lce stormwater infiltration systems (e.g., pervious pa��crs or siuface ponding areas and/or swales) may be used to avoid creating hydraulically-connccted pavement from a stormwater treatment standard. • From a stonmvater treaunent standpoint, for a paved area to be considered itydraulically- disconnected, stonnwater runoff from at least the 6-month, 24-hour storm must be ftilly retained and/or infiltrated. The options for trcltment of nmoPf from hydraulically-connected pavement are: . an infiltration bnsin with pretreatment*, if suitable soils exist on the site • a wetpond . a constructed wcdand . a stormwater technology that has received a GULU (General Use Leve] Designation) Gom the Washington Statc Departmen[ of Ecology for either basic or enhanced treatment, with pretreaunent* 20. *acceptable pretre.ttment systems are either a wetvault or tank designed in accordance with City standards and containing 30% of the 6-month, 24-hour storm as dead storage, , or a pretreatment system that has ootained a GULD for pretreatment from the �VuSI1lI1L10i1 Slnte Department of Gcology 21. Starmwater detention is required when �,000 square feet or more of hydraulic�lly- connected impervious arca is created by a project. • If suitaole soils eaist on the site, undereround infiltration systems (e.g., infiltration - trenches) or surlace stormwater inliltration systems (e.g., splash biocks, pervious pavers, or surface ponding areas and/or swales) may be used to avoid creating hydraulically- connected impervious area from a stormwater detention standpoint. Section 3-2.2 of the City's Srormwater \-fanagement Manual lists site and design criteria that must be met. • From a storm��ater detention standpoint, for nn impervious area to be considered h��drnulicalh--disconnected, storm��ater runoff from the 100-year, 24-hour storm must be �� /