Laserfiche WebLink
S�',ED MZX FOR GRASS SWALES AND BIOFILTRATION SWALES: <br /> (all percentages by weight) � <br /> Meadow Foxtail 40� <br /> (Alooecurus pratensis) <br /> Alta Fescue 25; <br /> (Festuca oratensis) <br /> Redtop Bent Grass 20•� <br /> (Aqrostis alba) <br /> Red Fescue l0� <br /> ( estuca ubra) <br /> Birdsfoot Trefoil 5� <br /> -�, <br /> (Lotus carniculatus) <br /> i <br />, t. <br /> -',t, . ADDITIONAL VEGETATION FOR BIOFILTRATION SWALES (plant all <br /> soeciesl • <br />; <br /> Slouqh Sedge 25 clum�s per loo squara <br /> (Carex obnupta) feet of swale bottom <br /> Spike Rush Z5 clump:s per 100 square <br /> I � (,E�eocharis nalustris) feet of swale bottom <br /> i <br /> I 'I Soft Rush 25 clumps per 100 square <br /> i (Juncus effusus) feet of swale bottom <br /> Small-fruited Bulrush 25 clumps per 100 square <br /> (Scirnus microous) feet of swale bottom � <br />� Note: Cattails (Typha latifolia) may be used in place of I <br /> any of the above species in biofiltration swales expected to � <br /> have ponded or standing water. <br /> i <br /> j <br /> Topsoil Type A - excerpts from WSDOT, APWA std 9-14 .1(1) <br /> with City modification. <br /> Topsoil shall k:e free from materials toxic to plant growth, � � � <br /> noxious weeds, rhizomes, raots, subsoil, stones, and other f;��,� <br /> debris. 100� of the topsoil shall pass through a 1/2 inch '�� 3 <br /> �� sieve. � � �;���� <br /> •s-. <br /> Topsoil Type A shall consist of a sandy clay loam, sandy "''tV°`,`. -r <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 />� - � � <br />