Agenda - 05-22-1989 - Laserfiche WebLink

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. , ■ . . ment plant by overloading the chanical equipment which will treatment system due to the heavy have to be serviced in perpetuity. inflows. In the case of pressure This is especially true when an sewers, infiltration is virtually individual pump system is installed eliminated due to the design of a at each home. However, a STEP tight system throughout. pump can be looked upon as H. Service Connections - In older another appliance and is subject communities, the septic tanks are to the same ongoing service usually located in back of homes requirements as a home furnace, with the house plumbing oriented refrigerator, hot water heater, etc. to the back.This can create a prob- Obviously, with the amount of lem of installing a gravity sewer equipment involved,it is important line to the street without changing to have a service capability estab- the house plumbing.On the other fished to handle it. This can be hand,the STEP system will utilize done by a service department the old septic tank or replace it within the sewer authority,or local with a new one. The service line service center established by the can be laid around the house to manufacturer or local pump the street at a minimum cost using representative. small diameter PVC pipe. B.Power Outages-With the holding I.Treatment Plant Size-If the treat- capacity of the pump basin and meat plant is being designed to the freeboard area of the septic . handle flow from a pressure sewer tank, the homeowner has in system only, the size can be excess of 24 hours storage reduced over normal design require- capacity, if the power goes off. ments due to the elimination of Since the national average power infiltration and inflow. . outage is around 2 hours this will provide adequate storage unless J.Water Conservation-Since water the power is off for several days. conservation is gaining a great Hopefully,the homeowner would deal of attention in many parts of refrain from washing clothes and the country,the value of pressure . taking showers during this time sewers in this regard becomes an frame to minimize any problems. important consideration. By elim- With a gravity collections system, Mating infiltration and inflow, the the homeowner can continue to amount of water polluted is re- use the sewage system assuming duced considerably.Since no man- . standby power is available to holes are used in pressure sewers, operate the pumping stations and the drain wastewater from wash- potable water is still available. ing cars and lawn watering doesn't C.Power Costs - With the ongoing end up being polluted by the increase in power costs,a home- domestic sewage and is returned owner is concerned about any in part to the water table, equipment that will increase his K.Land Planning - Public officials electric bill by any substantial in rural areas can limit the amount amount. Since a simplex STEP of population expansion in a corn- pump only operates on the aver- munity by the amount of potential age of 10-15 minutes a day, the growth that-Is sized into the pres- annual power cost will be under sure sewer mains. This alleviates $10.00 a year, based on an aver- some of the fear of rapid growth age kilowatt per hour cost of six if gravity.sewers are installed. cents. Since pressure sewers are more ID.Aesthetics of System - Some adaptable to hilly,rocky and high . - homeowners are concerned about water table areas, the developer the appearance of the equipment has more flexibility in laying out • in their yard. Since the basin his lots for maximum lot,sales cover is buried flush with the dollars in comparison to some ground,it is difficult to notice from restrictions with gravity, the road.Control panels with alarms are attached to the sides of the DISADVANTAGES OF home,making them inconspicuous EFFLUENT PRESSURE except if visual or audio alarm is SEWERS VERSUS GRAVITY activated. The homeowner may . also be concerned about the A.Mechanical Equipment-Probably damage to the premises when in- the major concern of installing a stalling the basin and service line. pressure sewer system is the ad- dition of a large amount of me- . . 5 N ....01■11■■•••■• ....--rdliAIG 8.14046Ail AND ASSOCIATES,O.A. . .