11102 EVERGREEN WAY 2018-01-01 MF Import

24 hour storm than the required wetpond volume, then 500 cubic feet more dead storage will be required) . Other wetpond standards must continue to be met, such as depth of water in the open water and treatment cells and the ratio of storaqe in the treatment cell versus that in the open water cell. The stage-storaqe relationship of the pond must also be submitted to show that the pond has the capacity to store the required wetpond volume. The following information regardinq the wetpond must be submitted to the City for review and approval: i 1) wetpond sizing calculations 2) orifice sizing calculations 3) stage-storaqe relationship of the pond 4) results of routing the 2 year design storm through the pond Orifiaa sisinc• Privately maintained restrictor devices may have a minimum orifice size of 1 inch. oil/wat�r s�parator/crit r�moval vault: City standards call for the vault to have an inlet capacity determined by using the rational formula with a rainfall intensity of 0.5 inches per hour over the contributing area. Bypass piping is required for the vault per City standards. The vault inlet capacity should be reached at the point that tha water elevation in the bypass pipe is at its peak for the 10 year storm. The vault must be sized to provide a 15 minute detention time for the design flow. The entire contributing area must be used in calculating the size of the oil/water separator vault although only the paved surface is required to be routed throuqh the separator. The following information regarding the oil/water separator must be submitted for review and approval: 1) design inlet capacity calculations � 2) orifice sizing calculations ' 3) oil/water separator sizing calculations 4) bypass sizing calculations ; 5) copy of site plan showing the contributing area �