11102 EVERGREEN WAY 2018-01-01 MF Import

Topsoil Tvos A - excerpts from WSDOT, APWA std 9-14 .1(1) with City modification. Topsoil shall be Pree from materials toxic to plant growth, noxious weeds, rhizomes, roots, subsoil, stones, and other debris. 100$ of the topsoil shall pass through a 1/2 inch sieve. Topsuil Type A ehall consist of a sandy clay loam, sandy loam, loam, clay loam, silty clay loam, or silt loam soil. The mix may not be more than 50$ sand nor 208 clay. Total organic matter shall be 1$ to 10�. A maximum of 20� of the mix volume may be ratained on a 1/4" sieve. Flow aontrol struatur� (reatriator abl : The flow control structure must be accessible for maintenance. A 15' wide all weather surface access road is required to be constructed to the control structure. The top of the flow control structure should not be centered in the middle of the access road. It should be off-center to the right as the vactor truck pulls up to the structure. A detail of the flow control structure must be provided in the plans. All orifice sizes and their elevations, as well as the overflow elevation, must be clearly shown on the detail of the control structure. aradinq: A plan for restoration of any wetland areas that will be disturbed by the construction of stormwater facilities (e.q. swales, wetpond, storm drains, etc. ) will be required to be approved by the Planning Department prior to the disturbance. The proposed topographical contours for the site, as well as the existing contours, must be shown, especially in swa,le and wetpond areas. oil/Mater saparator: The inlet and outlet elevations 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.