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, <br /> SEED MI% FOR 3gp�SS SWALES AND B7oFr <br /> (all percentaqes by weight) LT�TION SWALFg <br /> Meadow Foxtail <br /> (Alopecurus nrat � 40$ <br /> Alta Fescue <br /> (Festuca nratensi�) 25� <br /> Redtop Bent Grass <br /> ( ros s alba) 20$ <br /> Red Fescue <br /> (Fes ca rubra) 10$ <br /> Birdsfoot Trefoil <br /> (7,�t�s �ornicu atus) 5$ <br /> ADDITTnNAL VEGETATION Fou gIOFI�,TRATION �WAL <br /> Slough Sedge <br /> ��� � u ta) 25 clumps per 100 square <br /> feet of swale bottom <br /> Spike Rush <br /> (�leocharis palustris) z5 clumps per loo square <br /> feet of swa1�= bottom <br /> Soft Rush <br /> . (Juncus e f„�„�� z5 clumps per 100 square <br /> feet of swale bottom <br /> Small-fruited Bulrush <br /> (�� �nicronus) 25 clumps per 100 square <br /> feet of swale bottom <br /> �� o e• Cattails (Tvnha lat_ ifolia) may be used in place of <br /> any of the above species in biofiltration swales expected to <br /> have standing water. <br /> ToDao 1 Twe A - excerpts from WSDOT, APWA std 9-14. 1(1) <br /> with City modification. <br /> � Topsoil shall be free from materials toxic to plant growth, <br /> ' noxious weeds, rhizomes, roots, subsoil, stones, and other <br /> debris. 100� of the topsoil sha11 pass thcough a 1/2 inch <br /> sieve. <br /> Topsoil Type A shall consist of a sandy clay loam, sandy <br /> loam, loam, clay loam, silty clay loam, or silt loam soil. <br /> The mix may not be more than 50$ sand nor 20$ clay. Total <br /> organic matter shall be 1$ to 10$. A maximum of 20� of the <br /> mix volume may be retained on a 1/4" sieve. <br />