1920 MERRILL CREEK PKY 2018-01-01 MF Import

oil/water separator desiqned for treating stormwater, such as a standard baffle-type oil/water separator may be more practical than the qrease intarceptor ahown on the plane. The desiqn of tha grease interceptor doesn�t make it efficient for sediment removal. =� City standards require a 72 inch diameter catch - basin/manhole, with a 48 inch deep Bump, to be provided �" upstream of the wetpond to provide for qrit removal. If a baffle-type oil/water separator designed to City standards is provided upstream, the 72 inch catch basin is not required. f� Rip-rap 12" deep and 2' wida should be placed from tha inlet � to the pond to the bottom of the pond. G��/ City standards require the followi.ng note regarding pond - berm materials to be included on the plans: t,� � ; NOTE: Berm soils shall consist of material conforming i.>�� -o , ; /, �,�� to the following gradation: �r/iCyil.s� '� .;'I(��'�'� " •/•i �;' Sieve Size � Passing 3�� 100 �4 65-90 ,�200 12-20 i � /;_ The City inspectors request that the wetpond construction i/ notes, from section 4-10. 3 (2) of the City�s standards, be provided in a conspicuous place on both the storm drainage plans and the landscape plans. P�AC�AQ: Surface ponds and basins with a maximum depth of three feet or less do not require fencing as long as the maximum interior side slope of the pond does not exceed 3: 1 (H:V) . City standards require all surface ponds or basins with a maximum depth greater than three feet to be fenced with a six foot high perimeter fence unless one of the following conditions is met: 1) a 10 foot wide safety bench for every three feet of design water depth and the side slopes of the pond are no qreater than 3: 1 (H:V) ; or 2) the maximum water depth of the facility does not exceed three feet during a two year storm, nor exceed three feet for more than four hours for a 25 year storm; the