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CITY OF EVERETT STORlNWATER MANAGEMENT MANUAL <br /> c. Minimum o(8-inch overlap at seams <br /> i <br /> d. On long or wide slopes,or slopes subject to wind,all scams shauld be taped <br /> e. Place plasdc into a small(12-iuch wide by 6-inch deep)slot trench at the rop of the slope <br /> and backfill with soil ro keep water from flowing undemcath <br /> f. Placc sand filled burlap or geotextile bags every 3 to 6(eet along seams and powd a <br /> wooden stake t6cough each to 6old them in place <br /> g. Inspect plastic for rips,tears,and open seams regularly and tepair immediately. This <br /> prevents high velocity runofC from contacting bare soil which causes extreme erosion <br /> h. Sandbags may be lowered into place tied to ropes. However, all sandbags must be <br /> staked in place. <br /> Maintenance Standards <br /> 1. Tom sheets must be replaccd and open seams repaired <br /> 2. If the plastic begins to detcriorale due to ultraviolet radiation,it must be completely removed and <br /> repleced <br /> 3. Whcn ttie plastic is uo longer needed,it shall be campletely removed. <br /> 3.2.11 BMP C124: Sodding <br /> Purpose <br /> The purpose of sodding is to establish pertnanent turf for immediate erosion protection and ro stabilize <br /> • drainage ways where concentrated ovcrland flow will occut. <br /> Conditions ol Use <br /> Sodding may bc used in thc following areas: <br /> • Disturbed areas t6at requ've shott•tenn or long-tertn covet <br /> • Disturbcd areas that requirc immediate vegetative cover <br /> • All watenvays[hat require vcgetative lining. Watenvays may also bc seeded rather lhan sodded, <br /> and protected with a net or blanket. <br /> Design and Insfallation Specl�cations <br /> Sod shall be free of weeAs,of unifortn thiclrness(approximately 1-inch thick),and shall have a dense root <br /> mat Por mcchanical shcngt6. <br /> The Following steps arc recommendcd for sod installation: <br /> I. Shapc and smooth t6c surfacc to final gradc in accordancc wiW thc approved grading plan. Thc <br /> swale needs to be over-excavated 4 to 6 inches below design elcvation to allow room for placing <br /> soil amcndment and sod. <br /> 2. Amend 4 ioches(nunimum)oC composi into the top 8 inches of the soil if the organic content of <br /> the soil is less than l0 percent or the pecmeability is less than 0.6 inches per hour. Compost used <br /> should meet Ecology publication 94-038 specifications for Grade A quality compost. <br /> 3. Fertiliu accotding to the suppliers recommendations. <br /> 4. Work lime and fertilizer 1 to 2 inches inro the soil,and smooth the surface. <br /> Volume 11—Cor,sWction StormwaterPollution Prevenfion <br /> 3-19 <br />