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11AINTE'JA:'CE SUGGESTIONS <br />SEPTIC TANK - Inspect the tank annually and have the tank <br />cleaned when the scum is 3 inches or less <br />above theoutlet baffle and/or when the <br />sludge level is 8 inches or less below the <br />outlet baffle. <br />DRAINFIELD - Annually change the plugs or caps in the drop <br />boxes to rest half of the adsorption field. <br />DOSING CHAt'B ER - If a dosing siphon is installed, the auxil- <br />iary vent should be cleaned annually. If <br />pumps are used in the dosing chamber, the <br />manufacturers maintenance schedule that comes <br />with the pump should be followed. <br />