6009 FLEMING ST 2021-06-09 - Laserfiche WebLink

• Popach Short Plat—2 Lots Table V-4.5.2(2) Maintenance Standards - Infiltration (continued) • Results Expec- Maintenance Defect Conditions When Maintenance Is ted When Component Needed Maintenance Is Performed time allowed for infiltration. Treat- • ment basins should infiltrate Water Quality Design Storm Volume within and/or facility is 48 hours, and empty within 24 hours cleaned so that after cessation of most rain events. infiltration sys- (A percolation test pit or test of facility tern works • indicates facility is only working at according to 90% of its designed capabilities. Test design. every 2 to 5 years. If two inches or more sediment is present, remove). Filter bag is • Filter Bags (if Filled with Sed- Sediment and debris fill bag more replaced or sys- applicable) iment and Debris than 1/2 full. tem is redesigned. Sediment and By visual inspection, little or no water Gravel in rock Rock Filters Debris flows through filter during heavy rain filter is • storms. replaced. Side Slopes See "Detention Erosion See "Detention Ponds" (No. 1). of Pond Ponds" (No. 1). Emergency See"Detention Overflow Tree Growth See "Detention Ponds" (No. 1). Ponds" (No. 1). Spillway and • See"Detention Berms over 4 piping See "Detention Ponds" (No. 1). feet in height. Ponds" (No. 1). Emergency Rock Missing See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). Overfil wlow ay Erosion See "Detention Ponds" (No. 1). See "Detention • Spillway Ponds" (No. 1). Pre-settling Facility or sump „ Ponds and filled with Sediments or designed sediment trap depth Sediment is of sediment. removed. Vaults and/or debris • • 2014 Stormwater Management Manual for Western Washington Volume V- Chapter 4 -Page 834 WESTERN ENGINEERS,INC. 39 PROJECT:15-1463-A •