2712 TAYLOR DR 2023-11-01 - Laserfiche WebLink

[.I-. {1 A 7. 1111-.:..4.... �... r.. C�-a M'I�wr1c _ Onfir�l•�4i/�Il �l�S1T+i1111P(ti Results Expected When Maintenance Is Per- Maintenance Component Defect Conditions When Maintenance Is Needed formed (A percolation test pit or test of facility indicates facility is only working at 90% of its designed capabilities. Test every 2 to 5 years. If two inches or more sediment is present, remove). Filter Bags (if applicable) Filled with Sediment and Sediment and debris fill bag more than 1/2 full. Filter bag is replaced or stem is redesigned. Y Debris Rock Filters Sediment and Debits By visual inspection, little or no water flows through filter during heavy rain stones: Gravel in rock filter 3 replaced. See Table V-A.1: Maintenance Standards - Deter - Side Slopes of Pond Erosion See Table V-A.1: Maintenance Standards - Detention Ponds . tion Ponds See Table V-A.1: Maintenance Standards - Deten- Tree Growth See Table V-A.1: Maintenance Standards - Detention Ponds tion Ponds Emergency Overflow Spillway, and Berms over feet in heiglit.' See Table V-A.1: Maintenance Standards - Deten- See Table V-A.1: Maintenance Standards -Detention Ponds Pion Ponds tion See Table V-A.1: Maintenance Standards - Deten- . Rock Missing See Table V-A.1: Maintenance Standards -Detention Ponds tion Ponds Emergency Overflow Spillway See Table V-A.1: Maintenance Standards - Deter - Erosion See Table V-A.1: Maintenance Standards - Detention Ponds tion Ponds Facility or sump filled Pre -settling Ponds and Vaults with Sediment and/or 6" or designed sediment trap depth of sediment. Sediment is removed. debris Table V-A.3: Maintenance Standards - Closed Detention Systems (Tanks/Vauits) Maintenance Defect Conditions When Maintenance is Needed Results Expected When Maintenance is Per - formed Component Plugged Air Vents One-half of the cross section of a vent is blocked at any point or the vent is damaged. Vents open and functioning. Accumulated sediment depth exceeds 10% of the diameter of the storage area for 1/2length of storage vault or any point depth exceeds 15% of diameter. Ail sediment and debris removed from storage Debris and Sediment - (Example: 72-in6h storage tank would require cleaning when sediment reaches depth of 7 inches for more than 1/2length of area: Storage Area tank.) Joints Between Tank/Pipe Section Any openings or voids allowing material to be transported into facility. Alljoint between tank/pipe sections are sealed. III require engineering analysis to determine structural stability). Tank Pipe Bent Out of Shape Any pad of tank/pipe is bent out of shape more than 10"/o of its design shape. (Review required by engineer to determine Tank/pipe repaired or replaced to design. structural stability). Cracks wider than 1/24nch and any evidence of soil particles entering the structure through the cracks, or main- Vault replaced or repaired to design ape - Vault Structure Includes Cracks in Wall, Bottom, tenance/inspection personnel determines that the vault is not structurally sound. cifications and is structurally sound. Damage to Frame and/or Top Slab Cracks wider than 1/24nch at thejoint of any inletloutlet pipe or any evidence of soil particles entering the vault through the No cracks more than 1/4-inch wide at the joint of walls. the inlet/outlet pipe. 2019 Stormwater Management Manua/ for Western Washington Volume V- Appendix A -.Page 1007