3214 BROADWAY BROADWAY KINECT APARTMENTS 2021-08-11

• • • CITY OF EVERETT STORMWATER MANAGEMENT MANUAL lb• c. Minimum of 8-inch overlap at seams d. On long or wide slopes, or slopes subject to wind, all seams should be taped e. Place plastic into a small(12-inch wide by 6-inch deep)slot trench at the top of the slope • and backfill with soil to keep water from flowing underneath £ Place sand filled burlap or geotextile bags every 3 to 6 feet along seams and pound a wooden stake through each to hold them in place • g. Inspect plastic for rips,tears, and open seams regularly and repair immediately. This • prevents high velocity runoff from contacting bare soil which causes extreme erosion h. Sandbags may be lowered into place tied to ropes. However, all sandbags must be • staked in place. • Maintenance Standards • 1. Torn sheets must be replaced and open seams repaired • 2. If the plastic begins to deteriorate due to ultraviolet radiation, it must be completely removed and • replaced AD3. When the plastic is no longer needed,it shall be completely removed. • 3.2.11 BMP C124: Sodding • Purpose • The purpose of sodding is to establish permanent turf for immediate erosion protection and to stabilize • drainage ways where concentrated overland flow will occur. Conditions of Use • Sodding may be used in the following areas: • • Disturbed areas that require short-term or long-term cover • • Disturbed areas that require immediate vegetative cover ID • All waterways that require vegetative lining. Waterways may also be seeded rather than sodded, 1111 and protected with a net or blanket. Design and Installation Specifications • Sod shall be free of weeds,of uniform thickness (approximately 1-inch thick), and shall have a dense root mat for mechanical strength. • The following steps are recommended for sod installation: • 1. Shape and smooth the surface to final grade in accordance with the approved grading plan. The • swale needs to be over-excavated 4 to 6 inches below design elevation to allow room for placing • soil amendment and sod. • 2. Amend 4 inches (minimum)of compost into the top 8 inches of the soil if the organic content of the soil is less than 10 percent or the permeability is less than 0.6 inches per hour. Compost used • should meet Ecology publication 94-038 specifications for Grade A quality compost. • 3. Fertilize according to the supplier's recommendations. • 4. Work lime and fertilizer Ito 2 inches into the soil,and smooth the surface. • • • Volume tl—Construction Stormwater Pollution Prevention 3-19 • •'