B Sand Bed 1 Standing water is present after the design drain time The observed drain time is approximately _________ hours. Y__ N__ Recheck to determine if there is standing water after 72 hours Remove any sediment buildup If standing water is present longer than 5 days, report to mosquito commission. Replace the sand layer (volume of replacement sand is specified in the Basin Configuration Targets in the Basic Design Information Section of this Manual) Work Order # ______________ 2 Excessive sediment, silt, or trash accumulation on basin bed Y__ N__ Clean pretreatment system Remove silt, sediment, and trash 3 Erosion or channelization is present Y__ N__ Check whether the flow bypass or diversion device is clogged Re-grade the infiltration bed Work Order # ______________ 4 Animal burrows/rodents are present Y__ N__ Pest control Work Order # __________ 5 Uneven bed Y__ N__ Use light equipment to resurface the bed Work Order # _________ 6 Evidence of sinkholes or subsidence Y__ N__ Monitor for sinkhole development Note:
C Vegetation 1 Large spot(s) showing bare soil Y__ N__ Vegetative cover must be maintained at 85%. Revegetate the entire basin if 50% or more vegetation has been lost Check Landscaping plan for guidance (if available) Work Order # __________ 2 Overgrown vegetation Y__ N__ Mow/trim the vegetation Work Order # _______ 3 Tree growth in the basin Y__ N__ Clear, trim, or prune the trees according to the original Vegetation or Landscaping Plan Inspect to determine if the tree roots caused any structural damage Work Order # __________ Note:
D Basin Embankment and Side Slopes 1 Signs of erosion, soil slide or bulges, seeps and wet spots, loss of vegetation, or erosion on the basin slope Y__ N__ Check for excessive overland runoff flow through the embankment. Check for any sink hole development Direct the overland runoff to the forebay or pretreatment area Restabilize the bank Work Order # __________ E Outlet 1 Trash or debris accumulation more than 20% Y__ N__ Clean and remove Determine source of trash and address to reduce future maintenance costs or basin failure 2 Trash rack is damaged or rusted greater than 50% Trash rack is bent, loose, or missing parts Y__ N__ Repair or replace trash rack Work Order #__________ 3 Outlet components (e.g., orifice plates or weir plate) skewed, misaligned, or missing Y__ N__ Repair or replace component Work Order #__________ 4 Discharge pipe apron is eroded or scoured Y__ N__ Restabilize the discharge riprap apron Work Order #__________ 5 Standing water is present in the outlet structure longer than 72 hours Pump out the standing water Work Order # __________ Note:
F Emergency Spillway 1 Trees or excessive vegetation present Y__ N__ Remove trees and roots, and restore berms if necessary Work Order #________ 2 Damaged structure Y__ N__ Repair Work Order #________ G Miscellaneous 1 Fence: broken or eroded parts Y__ N__ Repair or replace Work Order #__________ 2 Gate: missing gate or lock Y__ N__ Repair or replace Work Order #__________ 3 Sign/plate: tiled, missing, or faded Y__ N__ Repair or replace Work Order #__________ 4 Excessive or overgrown vegetation blocking access to the basin Y__ N__ Clear, trim, or prune the vegetation to allow access for inspection and maintenance Work Order #________ Note: