7500 HARDESON RD 2021-06-09 - Laserfiche WebLink

I The following inspection/maintenance schedules shall be utilized to ensure the ESC facilities are functioning as designed: Construction Entrances • The construction entrances shall be inspected once a week during the dry season and after I every rainfall event during the wet season. If the entrance is not preventing sediment from being tracked onto adjacent pavement,then alternate measures to keep the pavement free of sediment shall be used. This may include street sweeping, an increase in the dimension of the entrance, or the installation of a wheel wash. • Any quarry spans that are loosened from the pad that end up on the roadway shall be removed immediately. Additional rock shall be added periodically to maintain proper function of the pad. • If vehicles are entering or exiting the site at points other than the approved entrances, temporary fencing shall be installed to control traffic. I Sediment Trap • The sediment trap shall be inspected once a week during the dry season and after every rainfall event during the wet season. • Sediment shall be removed from the trap when it reaches 1 foot in depth. • The staff gauge shall be inspected and replaced if damaged then repositioned after dredging. Any damage to slopes shall be repaired. • Check pond slopes for raveling. Concentrated flows shall not be allowed to flow down the pond slopes without providing rock armoring. • Inspect outlet to ensure it is functioning properly and is not plugged. Temporary and Permanent Seeding • Seeding may be used throughout the project on disturbed areas. During the dry season, areas that have reached final grade, or are not being actively worked, shall be seeded within 15 days. Seeded areas shall be supplied with adequate moisture, but not watered toIII the extent that it causes runoff. • During the wet season, all disturbed areas not being actively worked shall be seeded or stabilized with mulch or plastic sheeting. • To prevent seed from being washed away, confirm that all other approved erosion/sedimentation control facilities have been installed and are functioning properly. • Any seeded areas that fail to establish 80 percent cover(100 percent cover for areas that receive sheet or concentrated flows)shall be reseeded. If reseeding is ineffective, an alternate method shall be used. • Seeded areas shall be inspected after every rainfall event during the wet season. Any areas that experience erosion shall be reseeded and protected by mulch. If the erosion problem is drainage related,the problem shall be fixed and the eroded area reseeded and protected by mulch. • Seeding shall not be used in areas subject to heavy vehicular traffic. Mulching I • Mulching shall be inspected once a week during the dry season and after every rainfall event during the wet season. I • Mulch shall be inspected to verify that the proper thickness is being maintained if applicable. Construction Stormwater Pollution Prevention Pla n OCICIEI Everett 7-Eleven 8 2180309.10