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. <br /> lives by the owner must regularly inspect and measure tl�e <br /> accumulation of sludge in il�e tank. 'I'liis must be done at least once � <br /> � every duee years. <br /> Sludge, or septage, includes the settled materials at the bottom of the <br /> tank, the floating scum matcrials at tt�e top of ttie taiik and the liquid in <br /> the tank at the time of cleaning. The septic tank should be cleaned <br /> whenever the tup of the sludge layer is cluser lhan 12 incl�es to the <br /> bottotn of tl�e outlet baftle or whenever d�e bottom of the scum <br /> layer is closer than 3 inches to the bottom of the outlet baine. Both <br /> conditions likely will not oc;cur at the same time in a septic ta�ilc, but <br /> either condition requires tank clea��ing. <br /> � <br /> � PENCIL <br /> i— , MARKS <br /> � � ;. <br /> o-. ,'.,.; � � <br /> 6 , . ��ir,� ' ''. <br /> � <br /> .:a <br /> � " Y. � � �Y :� 1 ��. <br /> �. 2 OLE o�i �� j�m <br /> �� MANH <br /> � ' i' i' �l <br /> •, . J� <br /> INLET L��,°.�j, � <br /> ;, �` .. SCUM u.�'� t �� <br /> ,}�'/ : _';:=:,;OUTLET LEVEI "'�c•� � 'I� .:: OUTLET <br /> !. _.t' • � _ •Ji��: ��•.I� •'�� � <br /> . --"_SCUM CLEAR SPACE- �i�� �'` ;: <br /> .' _'. --r�" CLEAN OUT TANK WI1EN: <br /> . � ----- ---- _ �..�. _ --- —�- 7a is 3• oR �ss or� <br /> � ;} _ --__T=—,.=--_ _ i`l� g �8"IS 12"OR LESS <br /> -�-- 1 <br /> �, 's;.'' � � � ' • . • . � . `;;� �� <br /> :::•;•'•� . :� <br /> '`'•'�'"�'''• BLACK CO�OR <br /> % �•.:;�..;::.;;; SLUDGE ;:` "' DISTINGUISHES SL.UDGE <br /> t �,`� ..;+�: '� . . . . i.` 'R ::j.: LAYER FROM LIOUIU <br /> .•r: <br /> • .t��;: � <br /> :�i`.. <br /> y/ <br /> MEASURE �CUM AND SLUDGE ACCUMULATIONS <br /> IN THE SEPTIC TANK <br /> To deternune scucn accumulation, use a three-inch square piece of <br /> wood attached to the bottom of a long stick. Push the measuring <br /> device through the scum layer into tl�e liquid layer. If the stick is <br /> carefully moved down and up, resistance on the"foot"should locate <br /> the bottom of the scum layer. Equipment is also commercially avail- <br /> able to measure scum and sludge accumulations. <br /> Mark the stick at a conveiiient reference point when you feel the <br /> bottom of tlie scum layer. .With the same stick, locate the bottorn of <br /> the oudet baffle. Determine the distance between the bottom of the <br /> scum layer and the bottom of the outlet baffle by measuring the dis- <br /> _ tance between the mazks on the stick. <br />