Agenda - 01-04-1988 - Laserfiche WebLink

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• - Actually, restoration is less of a 037 3 problem than with installing up, the STEP pump should operate or bl gravity service line d a 4u up to 10-15 years before major over- the narrow and shallow trenches haul will be required (replace seals, required. bearings, motor). During the interim E. Operating Problems - Once a some pumps will require service but this should be in the range of 1% of pressure sewer system is started units in operation up and any initial problems are means that if you have e1,000 units hin t Corrected, the system will require ongoing service as with any other a given project service Could calls per sewer system.Occasionally a pump aPP�ximately 10 service calls per will plug when some large solid year ould increase accordingly as tyou object such as a propylactic gets approached 10 years of operation. by the septic tank baffle. However, this is a rare occurance. Grease In addition to the does not present a potential prob- be 5e pump, there will lem of fouling controls as in the service requirements for other problems, such as control failures, case of grinder pressure sewers occasional pump plugging, pump air since most of the grease remains lock, etc. These in the septic tank. It must be . types of nuisance remembered that the septic tank problems can usually be corrected at the installation site and will ac- of a STEP pressure sewer will count for another 3% of Service calls Continue to accumulate solids. per year. This, in conjunction with This will require that the septic pump failure service calls, would add service calls tank be pumped periodically, up to 4,6 Based on past experience the pump stems in o per year for pump-out cycle should be 10 P s Y Aeration. years or greater using a 1000 It is a general consensus of opinion gallon septic tank. The septage that a once a year preventive main- can be used as a soil conditioner tenance program is helpful to reduc- or fertilizer under proper treat- ment and control, ing potential service problems. This would include removing cover, oper- ate pump manually, exercise shutoff OPERATION & valve, check alarm system and meas- MAINTENANCE ure sludge level of septic tank. The most important consideration in One important step to reduce poten- tial service calls is the education o installing a STEP pressure sewer f system, aside from capital costs, is the homeowners. It is very helpful the effect and cost of ongoing main- to distribute a pamphlet to the public tenance. It is generally recognized describing how a pressure sewer that pressure sewers will require works and what the homeowner more maintenance than a convention- should do in case of a failure- A list of `Do's and Don'ts' will reduce the al sewer system due to the large amount of mechanical equipment on possibility of the user discharging 'hand. This is especially true if you unwanted items into the drain system, such as towels, panty hose and cloth- are installing a pump system at each individual home, which would be the ing articles. Although the STEP of pressure sewers case in over 8096 pump is designed to handle small installed to date, solids within reasonable .limits, it is bener to keep such articles out of Since the industry has over 14 years • either conventional gravity sewers or of field experience with STEP ores_ pressure sewers whenever possible sure sewer operation, it is possible - In the case of a STEP pressure sewer, most of the heavy solids will. to offer some Observations on their operation and sewer requirements. settle to the bottom of the septic tank. - If a pressure sewer is designed prop- Experience has indicated that the city, installed correctly and quality maintenance cost to maintain the • pump equipment is utilized, the sys- service lines and force mains is negli- tern will perform satisfactorily. The Bible. Occasionally a pipe is frozen submersible centrifugal STEP pump _ or a pipe broken due to excavation is the most reliable component with- work in the area. in the pump system. Once any bugs are worked out of system on start CRAIG B.1rtORGAN AN0 A550CIATt.5,-P.A. __ •