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' SEPTIC S�STEM OWNER�S GUIOE <br /> Cleaning Frequency Guidelines <br /> , How often a septic tank needs to be cleaned depends on the tank's design and how it is operated. In this <br /> charc, the negative factors that affect the cleaning frequency are called EFFECTS and the positive factors <br /> that reduce the frequency of cleaning are called CREDITS. <br /> ' Consider the frequency guideline from this worksheet and the conditions observed when the tank is <br /> cleaned to decide when the tank will next need cleaning.No tank should go more than 36 months between <br /> cleanings! <br /> ' � � <br /> FACTORS iACTORS <br /> ' Enter 10 points for Enter 10 points if you: <br /> wastewater that <br /> enters the septic • Water conditioning unit(water <br /> system for each of softener or iron filter) • Use a suds-saving or front- <br /> these appliances: loading clothes washer,or <br /> � • Garbage disposal do 4 or fewer loads of <br /> • Automatic clothes washer laundry spread <br /> throughout the week <br /> ' • An in-home business(such as • Have two full-size septic <br /> Enter 10 points if tanks or one tank with <br /> you have: daycare,beauty shop) 150%or more of the <br /> • More than 4 over-night guests at a capacity required for <br /> ' time,several times per year your house <br /> • A laundry pattern of doing three <br /> or more loads/day Enter 5 points if you: <br /> Enter 10 points if HOUSE SIZE TANK CAPACITI� • Are ULTRA-CONSERVATIVE <br /> our se tic tank on water use <br /> Y P 2-3 bedrooms 1000 gallons (see chart,p.13) <br /> is smaller than 4-S bedrooms 1500 gallons <br /> indicated for the 6-7 bedrooms 1750 gallons • Use low-volume toilets <br /> size of the 8-9 bedrooms 2000 gallons (3 gallon or less <br /> house: - per flush) <br /> Enter the points ����Y POINTS • Use low-flow <br /> indicated if the �-2 Years ago 0 shower heads <br /> last cleaning was: 3-5 years ago 5 <br /> 6-10 years ago 10 • Have two or fewer people <br /> more than 10 years ago 12 in the house and bathe <br /> fewer than five times <br /> The number of per week <br /> people living and ��size M OF PEOPLE �oan <br /> • Have no one at home <br /> using water in the 2 bedroom —3= for 10 hours or more <br /> ' household affects most days <br /> the cleaning 3 bedroom —4= <br /> frequency.Enter <br /> the number of 4 bedroom —5= X3= TOTAL CREDITS <br /> ' people for the (subtract <br /> house size and do 5 bedroom —6= if number <br /> the calculation. 6 bedroom —7= is negative) <br /> ' 7 bedroom —8= <br /> TOTAL EFFECTS <br /> ' <br /> , <br /> 1 <br /> ' 18 <br />