1600 121ST ST SE 2016-01-01 MF Import

2) the maximum water depth of the facility does not exceed three feet durinq a two year storm, nor exceed three feet for more than four hours for a 25 year storm; the side slopes are a maximum of 3:1 (H:V); and the facility is a dual use faciLity; or 3) specific City Council approval is granted for an exemption per the criteria in the City�s Design and Construction Standards and Specifications. Detention Fond• The access rorw must be provided to the firsY. cell, as it is in this fir�t cell that the majority of sediment will accumulate. If the pond will not be fenced, the maxfmum side slope of any berm between the two cells must be 3:1. 011/water seuarator(sI: The inlet and outlet elevations of the separator(s), the elevation of the bottom of the separator(s), and the position and height of interior baffles must be clearly shown on a vault detail. The vault details must also call out a sampling tee at each vault outlet. Downstream conditions must not result in water being backed up into the oil/water separator(s). The maximum elevation of water downstream should be a minimum of one foot below the invert elevation of the outlet pipe. The oil/water separator main�enance notes from section 4-11.3 of the City of Everett Desiqn and Construction Standards and Specifications must be included on the plans. Desiqnated Car Wash Area: At least one sign must be posted near the car wash area, identifying its use. The location of the siqn must be shown on the plans, as well as what the sign will say. The plans must show details of the cover over the designated car wash area - particularly with respect to the dimensions of the cover (sliqhtly larger than the space itself) and its height (high enouqh to allow washinq of the tallest commonly used domestic vehicle, such as a van).