2015-00909 - new/replacement septic system

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E=16 �v �. �- --- . � �" a � �o � � a�. 6 � . l � Figure E-17: Pump Tank , P�99Yback plug in Specitications Weatherproo(closure or in house basement power supply alarm wire union or other quick- control w�re disconnect fittmg final 9rade � "7 i�.ry• •H: <F� :� • ' . alarm tloat on separate electrical circuit , c.�,,,;3 � .. . 9 � ; Start leve� �'''" � 1 c�3 � � ; . l sh�t_o�lev I �• b�to elevate . pump hom pump control float � �nk bottom � o00 . reaches twice the do.5e amount (the emergency level). Proper � dosing tank construction, placement and sizing must be considered to ensure reliable system operation. The dosing tank construction requirements are the same as for sewage tanks. The tank must be durable and watertight and must withstand the soil loads, which tend to push in on the walls. The environment in the tanks is very corrosive, so no metal parts or fittings should be used. The major difference between a septic tank and a dosing tank is that the dosing tank will be emptied on a daily basis. Since the tank will be emptied every day, anchorin�; it against Flotation is critical in areas with a high seasonal or permanent water table, where mound systems, which require pressure distribution, are often used (see Figure E-16). � Erl,suring that the dosing tank is watertight is also critical. In ' . �areas with a high seasonal or permanent water table, groundwater may leak into the dosing tank rnd ovecload the system. The seals around the pipes that enter and exit th� dotiin�; tank are especially vulnerable to leaks. If the pump is running more than the few minutes a day it takes to pump out �� accumulated septic tank effluent, groundwater may be leaking into the septic tank or dosing tank. + � �Y , . �'�. ._-,,t, i � . � ,- 4� ..•.� t.