1505 112TH ST SW 2018-01-02 MF Import

ale The structure that releases flows into the biofiltration ^-0'1",I Swale should have a capped riser, with a 1 inch vent hole, dt y� that extends G inches above the elevation of the direct _s r * wetland overflow. , Oil/water separators The inlet and outlet el.ivations of the separator, the elevation of the bottom of the separator, and the position and height of interior baffles should be clearly shown on the vault detail. The separator should be equipped with a sampling tee at its l�yl i eF.2outlet. i L Downstream conditions must not result in water being backed up into the oil/water separator. 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 maintenance notes from section 4.11.1 of the City of Everett Design and Construction Standards and Specifications must be included on the plans. PI-M M)CTiFS•1sQ1 ,'eS e? „11 rockeries or retaining walls greater than 4 feet high j^d must be structurally designed and the structural design must & rd ` be submitted to the City for review by the City's structural as , a� engineer. VIP a, When perforated pipe is called out, the type of pipe, size 7 my of perforations and spacing of perforations must be called out. U/s•I. C`,,P It is important to leave enough horizontal room for •L y," ' s construction of the rockeries. City of Everett inspectors •�W ry a F` indicate that 4 feet or more is typically necessary. The y^M1" �'.,✓ eS plans need to show this distance to demonstrate that the 4' CICC ":I`designed facilities will actually fit into the space P twe",l provided. at' *U �.w The silt fence provided for erosion control around the edge of the wetland should be placed at the edge of the wetland buffer in all areas where grading is not occurring within the buffer area. r- The invert elevation of the pipe to be located at the outlet *set � of the wetland must be approved by the City's environmental r (14 , / planner. P.ye OIAV A+