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KITTITAS COUNTY SOLID WASTE ON-CALL <br />CLE ELUM TRANSFER STATION TANK REPLACEMENT <br /> SEPTEMBER 2025 Temporary Erosion and Sediment Control <br /> 015713 - 5 <br /> <br />9. Wherever runoff will flow around end of barrier or over the top, provide temporary splash <br />pad or other outlet protection; at such outlets in the run of the barrier, make barrier not <br />more than 12 inches (300 mm) high with post spacing not more than 4 feet (1220 mm). <br />C. Temporary Seeding: <br />1. When hydraulic seeder is used, seedbed preparation is not required. <br />2. When surface soil has been sealed by rainfall or consists of smooth undisturbed cut <br />slopes, and conventional or manual seeding is to be used, prepare seedbed by scarifying <br />sufficiently to allow seed to lodge and germinate. <br />3. If temporary mulching was used on planting area but not removed, apply nitrogen fertilizer <br />at 1 pound per 1000 sq ft (0.5 kg per 100 sq m). <br />4. On soils of very low fertility, apply 10-10-10 fertilizer at rate of 12 to 16 pounds per 1000 <br />sq ft (6 to 8 kg per 100 sq m). <br />5. Incorporate fertilizer into soil before seeding. <br />6. Apply seed uniformly; if using drill or cultipacker seeders place seed 1/2 to 1 inch (12 to 25 <br />mm) deep. <br />7. Irrigate as required to thoroughly wet soil to depth that will ensure germination, without <br />causing runoff or erosion. <br />8. Repeat irrigation as required until grass is established. <br />3.05 MAINTENANCE <br />A. Inspect preventive measures weekly, within 24 hours after the end of any storm that produces <br />0.5 inches (13 mm) or more rainfall at the project site, and daily during prolonged rainfall. <br />B. Repair deficiencies immediately. <br />C. Silt Fences: <br />1. Promptly replace fabric that deteriorates unless need for fence has passed. <br />2. Remove silt deposits that exceed one-third of the height of the fence. <br />3. Repair fences that are undercut by runoff or otherwise damaged, whether by runoff or <br />other causes. <br />D. Clean out temporary sediment control structures weekly and relocate soil on site. <br />E. Place sediment in appropriate locations on site; do not remove from site. <br />3.06 CLEAN UP <br />A. Remove temporary measures after permanent measures have been installed, unless permitted <br />to remain by Engineer. <br />B. Clean out temporary sediment control structures that are to remain as permanent measures. <br />C. Where removal of temporary measures would leave exposed soil, shape surface to an <br />acceptable grade and finish to match adjacent ground surfaces. <br />END OF SECTION