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SEED MI'{ FOR GRASS SWALES AND nIOFILTRATION SWALES: <br />(all percentages by weight) <br />Meadow Foxtail <br />(Alopecurus oratensis) <br />Alta Fescue <br />(Festuca pratensis) <br />Redtop Bent Grass <br />(Aarostis alb�) <br />Red Fescue <br />(Festuca �ubra) <br />Birdsfoot Trefoil <br />(Lotus corniculatus) <br />Slough Sedqe <br />(Carex obnupta) <br />Spike Rush <br />(Eleocharis palustris) <br />Soft Rush <br />(Juncus effusus) <br />40% <br />25% <br />200 <br />l0% <br />5$ <br />25 clumps per 100 square <br />feet of swale bottom <br />25 clumps per l00 �quare <br />feet of swale bottom <br />25 clumps per 100 square <br />feet of swale bottom <br />Small-fruited Bulrush 25 clumps per 100 square <br />(Scirpus micropus) feet of swale bottom <br />Note: Cattails (Typta latifolia) may be used in place of <br />any of the above species in biofiltration swales expected to <br />have ponded or standing water. <br />Toosoil Tvpe 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 shall pass through 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 lo%. A maximum of 20% of the <br />m�x volume may Ue retained on a 1/4" sievc. <br />