2208 W CASINO RD 2018-01-01 MF Import

e 'acceptable pretreatment syetems are either a wet vault or tank designed in accordance with City standards and conteining 30%of the 8-month, 24-hour atortn ea dead atorage, or a pretreatment system that has obtained a GULD for pretreatment from the Washingion Stale Department oF Ecology. 20. Stortn water detention is required when 5,000 square feet or more oi hydraulically- connected impervious area is created by 3 proJect. . If suKable soils exist on the efte, underground infiltration syetema (e.g., infiltration trenches) or auriace stortn water infiltration system (e.g., splash block, pervfous pavers, or surface ponding areas and/or swales) mey be used to avoid creating hydraulicelly- connected impervious area from a storm water detentfon standpoint. Section 3-2.2 of the City's Stormwaler Management Menual liats site and desipn criteria that must be met. . From a atorm water detention standpoint, tor an impervious area to be considered hydraulically-disconnected, stortn water runoii from lhe 200-year, 24-hour atorm must be fully retained and/or infillrated — without resulting In significant potential tor adverse eHects from the infiltrated water (such as slope saturetion or migration to crawlspacea and/or basements). However, if the on site eoila cannol suppoA full infiltretion of the 100•year, 24-hour storm, partial infil:retion may still be feasibie to meet a!lowable storm water release requirements. 21.All storm water (acilities shall be designod in accordance with applicable City standards and/or design policies. 22. Due to the proximity of ths sile to environmentally sensitive ereas, seasonel limitations may be placed on land alteration aclivities, which are defined in the City's Design and Constructfon Standards and Specifications as clearing, grubbing excavation, fllling, grading, and stockpiling. Determinalion oi lhe exact seasonal limitation period requirea site-specific informalion generelly not eveilable until the project deaipn atege. However, preliminary analysis using the infortnetion evailable at thie time indicatea lhat land alteraclon aclivitiea on the project site may be restrided to the period between April 1 and October 1. 1 23.All chemicala or products of a hazardous �r toxic nature that may be used or stored on the site must be stored under cover and isolated from the storm dreinage system. 24.Collected surface water from this property must be discharged lo the easterly wetland in a way that will not result in erosion or Oooding. 25.Table 1-5.7 of the City':;Stormwater Management Mar.�al contains an error in the 'n'values for sheet flow. The col��mn of values ahould read "" 011, 0.05, 0.25, 0.24 0.41, 0.23, 0.40, O80". 26. The water main must be looped around the building par C!�y Design Standards. A desiyn of the pubtic water main will be required prior to issuance ot pertnits. 27. An ADA accessible pedestnan conncection irom the straet to lhe building entrance must be provided, and included on plans submitted for construdion permits for approval. �' �/�y