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Marion Count ; OREGON COMMUNITY DEVt:LO FMEN'I' DEPARTMENT The following information describes the operation and maintenance needs o2 your Sand Filter System. The septic tank acts as a separation chamber for both seetieable and floating solid material. The solids are retained in the tank and the liquid is allowed to £1o~ through the tank, The tank efficiency is partly dependent irs capaci- level of solid material in the tank at a level that will not,allow the flow of solids out of the tank and into th= sand Filter unit. A~otification letter will be sent based on the sy,tem e~pletion date of ~/wf/~ ~ The ~ecOnd tank in the sy~t~ is a do~i~g tank which Contains the effluent p~mp apparatus. The syst~ is set to di~oha~g~ a~proximately ninety (90) 9allon~ ~r cycle for a homesit~ with a sewage flow up to 450 gallons per ~a~, Th~ pump ~tation should be in~cte~ and te~ted yearly. Any changes In to r~t=ict the flow of suspended solid material to the pump, If allo~d to Sand Fil=er and cause a failure in the system. The screen should be inspected yearly and cleaned a~ needed, A garbage disposal in ne% recommended. If you have or plan to add one to you~ kitchen, caution should be exercised with its use. The added ~astes can Contribute to system performance problems. The septic tank should be pumped more of%eh with a disposal on the system, possibly every two (2} years. a~e several =hiDgm you should not do to a Sand Filter; Flush unusual or high strength wastes such as photographic chemicals or water softener backwash. Ignore leak~ in plumbing, especially toilets. The additional wa~er flow can cause system failure. Signi~ican=ly Change the use of the system thereby increasing the waste atrength or volume such as adult foster care~ beauty salons, etc.. Use chemical or biological septic treatments as these can have an adverse affect On system components and/or effluent characteris~£~.