1001 N BROADWAY EVCC 2025-10-03 - Laserfiche WebLink

s � r Design and Sod shall be free of weeds, of uniform thickness (approximately 1-inch Installation thick), and shall have a dense root mat for mechanical strength. f. Specifications The following steps are recommended for sod installation: i • Shape and smooth the surface to final grade in accordance with the approved grading plan. The swale needs to be overexcavated 4 to 6 inches below design elevation to allow room for placing soil amendment and sod. Amend 4 inches (minimum)of compost into the top 8 inches of the soil if the organic content of the soil is less than ten percent or the permeability is less than 0.6 inches per hour. See k httl)://www.ecy.wa.gav/pz•ograiiis/swfa/organics/soil.html for further information. j Fertilize according to the supplier's recommendations. y Work lime and fertilizer 1 to 2 inches into the soil, and smooth the surface. j • Lay strips of sod beginning at the lowest area to be sodded and perpendicular to the direction of water flow. Wedge strips securely into place. Square the ends of each strip to provide for a close,tight fit. Stagger joints at least 12 inches. Staple on slopes steeper than 3H:IV. Staple the upstream edge of each sod strip. i Roll the sodded area and irrigate. i When sodding is carried out in alternating strips or other patterns, seed the areas between the sod immediately after sodding. i Maintenance if the grass is unhealthy, the cause shall be determined and appropriate Strnulru rls action taken to reestablish a healthy groundcover. If it is impossible to t establish a healthy groundcover due to frequent saturation, instability,or some other cause, the sod shall be removed, the area seeded with an appropriate mix, and protected with a net or blanket. k k . BMP C125: Topsoiling I Composting F P111pose Topsoiling and composting provide a suitable growth medium for final site stabilization with vegetation. While not a permanent cover practice in itself, topsoiling and composting are an integral component of providing permanent cover in those areas where there is an unsuitable soil surface for plant growth. Use this BMP in conjunction with other BMPs such as seeding,mulching, or sodding. Native soils and disturbed soils that have been organically amended not only retain much more stormwater,but they also serve as effective biofilters for urban pollutants and, by supporting more vigorous plant growth, reduce the water, fertilizer and pesticides needed to support I i k Vohnne H—Construction Stormwaier Pollution Prevention-August 2012 4-28 I E