1994-006559 - new septic system - Laserfiche WebLink

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• lives by the!owner must regularly inspect and measure the accumulation of sludge in the tank. This must be done at least once every three years. Sludge, or scptage, includes the settled materials at the bottom of the tank, the floating scum materials at the top of the tank and the liquid in the tank at the time of cleaning. The septic tank should be cleaned whenever the top of the sludge layer is closer than 12 inches to the bottom of the outlet baffle or whenever the bottom of the scum layer Is closer than 3 inches to the bottom of the outlet baffle. Doth conditions likely will not occur at the same time in a septic tank, but either condition requires tank cleaning. A . Wiring II Mal h' � -----�, r P INLET _74 `►'i. CUM ti ;'� 6 ;r, r."• - • r OUTLET 11°' • r t�•,OUTLET LEVEL ;� -t IR • ;? t }+ `•- SCUM CLEAR SPACE'_ • ; " CLEAN OUT TANK WI IEN: ` _ •-- -- 7a IS 3' OR LESS OR • • _ _'- "'_ -p"IS 12'Olt LESS se I r ;•;•• SLUDGE ' „ BLACK COLOR } � �'' ;,i.,rti'•.. . - !;:,;. '� ALDAYV FROM LIOUIO GE 1d' MEASURE SCUM AND SLUDGE ACCUMULATIONS IN THE SEPTIC TANK To determine scum accumulation, use a three-inch square piece of wood attached to the bottom of a long stick. Push the measuring device through the scum layer into the liquid layer. If the stick is carefully moved down and up, resistance on the"foot"should locate the bottom of the scum layer. Equipment is also commercially avail- able to measure scum and sludge accumulations. Mark the stick at a convenient reference point when you feel the bottom of the scum layer. With the same stick, locate the bottom of the outlet baffle. Determine the distance between the bottom of the • scum lajyer and the bottom of the outlet baffle by measuring the dis- tance between the marks on the stick.