Agenda - 11-23-1987 - Laserfiche WebLink

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4 , 12 l. 113 + 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 0 usually located in back of homes requirements as a home furnace. with the house plumbing oriented refrigerator, hot water heater, etc. 0 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 0 I.Treatment Plant Size- If the treat- capacity of the pump basin and ment plant is being designed to the freeboard area of the septic d 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 J. Water Conservation-Since water provide adequate storage unless conservation is gaining a great the power is oft for several days. • in many Hopefully, the homeowner would deal of attention y parts of refrain from washing clothes and the country, the value of pressure $ 0 sewers in this regard becomes an taking to minimize e a during rob time important consideration. By elim- frame to minimize any problems. import infiltration consideration. and inflow, the With a gravity collections system, amount fi water and inflow, i , re- the homeowner can continue to duced considerably.Since no man- use standby sewage system available to 0 holes are used in pressure sewers, operate power in a taiio s d the drain wastewater from wash- operate the pumping stations and inn cars and lawn watering doesn't potable water is still available. end up being polluted by the C. Power Costs - With the ongoing domestic sewage and is returned increase in power costs, a home- 4 in part to the water table. owner is concerned about any K. Land Planning - Public officials equipment that will increase his in rural areas can limit the amount electric bill by any substantial of population expansion in a corn- amount. Since a simplex STEP munity by the amount of potential pump only operates on the aver- growth that is sized into the ores- age of 10-15 minutes a day, the annual power cost will be under sure sewer mains. This alleviates - some of the fear of rapid growth $10.00 a year, based on an aver- -0 if gravity sewers are installed. age kilowatt per hour cost of six Since pressure sewers are more cents. 4 adaptable to hilly, rocky and high D.Aesthetics of System - Some water table areas. the developer homeowners are concerned about has more flexibility in laying out the their yard. i the theip assn his lots for maximum lot-sales in their yard. Sinus the basin dollars in comparison to some cover is buried flush with the restrictions with gravity. ground,it is difficult to notice from the road.Control panels with alarms . V DISADVANTAGES OF are attached to the sides of the EFFLUENT PRESSURE home,making them inconspicuous except if visual alarm is 4 SEWERS VERSUS GRAVITY _ activated. The e homeowner owner may y 4 A. Mechanical Equipment- Probably also be concerned about the the major concern of installing a damage to the premises when in- pressure sewer system is the ad- stalling the basin and service line. * dition of a large amount of me- CRAIG B.MOAGANAND ASSOCIATES,P.A. 4