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No.26—Private Stormwater Pumps <br /> Note: Stormwater pumps are allowed within the city on a very limited basis and only with special approval. <br /> The following maintenance standards are included to facilitate inspection of these systems where they exist. <br /> This table is not a substitute for manufacturer's operations and maintenance documentation. <br /> Maintenance Conditions When Suggested Corrective Results Expected <br /> Component <br /> Defect Maintenance Is Needed Action When Maintenance Is <br /> Performed <br /> Wetwell Trash and Sediment is 6 inches deep Remove pump wash out Wetwell is clean with no <br /> Debris or reaches the bottom of bottom of wet well sediment. <br /> the pump intake. <br /> Accumulated floating trash Rake or pick out floating No trash or debris in <br /> or debris covers 50%of debris p g wetwell. <br /> water surface. <br /> Trash blocks or plugs Lift pump inspect pump No trash or debris in <br /> pump intake or otherwise suction clean out debris wetwell. <br /> inhibits pump operation. <br /> Physical Access frame and grate or Replace/repair/ Undamaged frame and <br /> Damage to hatch loose or damaged. reattach grate to hatch grate secured to wetwell <br /> Wetwell frame structure. <br /> Wetwell structure Clean and patch/grout Wetwell structure is <br /> damaged,portions of cracked and broken repaired,all parts are <br /> structure missing,or rebar cement present,no rebar is <br /> exposed. exposed. <br /> Groundwater flows into Wetwell is sealed and no <br /> wetwell causing pumps to Reseal/grout wet well groundwater intrusion is <br /> turn on even when there is leaks observed. <br /> no surface water flow. <br /> Overflow Emergency overflow Overflow repaired. <br /> blocked/not functional. Inspect overflow for <br /> Water fills past overflow debris/blockage/ <br /> point when pumps turned collapse.Remove debris, <br /> repair pipe <br /> off. <br /> Piping Piping within the wetwell Check flanges and Piping is repaired or <br /> is broken or damaged, fittings for tightness, replaced to original <br /> especially if leakage replace broken or specifications. <br /> occurs when pumps are on. damaged piping <br /> Pump Pump(s)not Pump has no power or Check panel for power, power is connected and <br /> check float operation, <br /> functional does not turn on. check power on pump pump operates as <br /> intended. <br /> side of contactor <br /> Pump runs but does not Check pump suction and Pump repaired/replaced <br /> pump at intended flow discharge for blockage, and now meets design <br /> rate. inspect pump and specs. <br /> impeller for damage <br /> No. 26—Private Stormwater Pumps(Continued) <br /> Pump(Cont.) Pump(s)not Pump is excessively noisy Check pump suction for Pump is <br /> functional to the point of reaching debris,inspect impeller adjusted/repaired/replace <br /> (Cont.) nuisance noise levels even for damage or suction d to eliminate nuisance <br /> when wet well is closed. screen repair or replace noise condition. <br /> Float/sensor Pumps cycle on and off Check control floats and Pumps cycle as <br /> malfunction when no water is present. contactors for proper designed,only when <br /> Pump operation. flow is present. <br /> STORM AND SURFACE WATER 4-37 <br />