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SUGGESTIONS FOR REGUI.AR MAINTENANCE OF SEPTIC TANKS <br /> WHAT IS IN MY BACKyA RD AND HOW DOES IT WORK? ' <br /> Most houses built in Orono �after 1960, where city sewer is not <br /> available, have two septic tanks,.; one or more distribution boxes � � <br /> and a number of drainfield trenches. Tn the septic tanks , heavy <br /> sewage solids �will settYe to the bottom and be decomposed by <br /> anaerobic (oxygen-free) bacterial action. Floating solids such - <br /> as grease, fat, and soap scum will _be retained_ inside , the tank :. <br /> by baffles at the inlet and outlet.� . In many cases , the first. <br /> tank will retain most of the solids' and the second tank merely <br /> provides extra settling �time, This ensures that' the �effluent <br /> en tering the drainfield is rela tively free of solids which tend - <br /> to clog up clay soils. _ � ' <br /> TYPICAL SEPTIC SYSTEM. ' <br /> ti..�S EM ENT' <br /> . <br /> Floating r=1r;Z T ;.-.-, _;e. __.r .,,_ _ <br /> � � ' - ��� . .. • :7 ;��'� � �'� <br /> SO�.1C�S • • � <br /> • ;. . �� -�+. • �• . ., <br /> : •.__ ; . .�� _ =:�=: s.:.':.=��_•: '�'J <br /> Slud e . ` <br /> g Dist�ibution Box � Drginfielc <br /> WHY BOTHER WITH pREVEI�ITIVE MAINTENANCE? . <br /> Eventually, a septic tank that is functioning correctly wil� accumulate <br /> a l3rge quantity of slud�e (decomposed wastes) and floating solids . <br /> If thi�s accurnulation is not removed regularly, the solids will by-pass <br /> the baffles in the tank and will be flushed out into the drainfield <br /> causing premature and unnecessary clogging of the drainfield. The <br /> result: sewage will back �up inro your. house and/or form a puddle ' <br /> . (or river) �i.n your yard. THERE. ARE NO INEXPEHSIVE WAYS TO REPATR A <br /> CLOGGED DRAINFIELD. <br /> � , <br />