Comp Plan 1974-1977 FILE #1 - Laserfiche WebLink

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1. The liquid depth of any septic tank or compartment thereof shall be not less than 30 inches. A liquid depth greater than six and one-half feet shall not be considered in determining tank capacity. 2. ~o tank or compartment thereof shall have an inside horizontal dimension less than 24 inches. baffles. Inlet and outlet connections of the tank shall be submerged by means 4. The volume in the tank between the liquid surface and the top of the inlet and outlet baffles shall be not less than 20 percent of the total required liquid capacity, except that in horizontal cylindrical tanks this space shall be not less than 15 percent of the total required liquid capacity. 5. Inlet and outlet baffles shall be constructed of acid resistant concrete, acid resistant fiberglass or plastic. 6. Sanitary tees shall be bonded to the inlet or outlet pipes. Baffles shall be integrally cast with the tank, affixed with a permanent waterproof adhesive or affixed with stainless steel connectors, top and bottom. 7, The inlet baffle shall extend at least six inches but not more than 20 percent of the total liquid depth below the liquid surface and at least one inch above the crown of the inlet sewer. 8. The outlet baffle and the baffles between compartments shall extend below the liquid surface a distance equal to 40 percent of the liquid depth except that the penetration of the indicated baffles or sanitary tees for horizontal cylindrical tanks shall be 35 percent of the total liquid depth. They also shall extend above the liquid surface as required in 4 above. In no case shall they extend less than six inches above the liquid surface. 9. There shall be at least one inch between the underside of the top of the tank and the highest point of the inlet and outlet devices. 10. invert. The inlet invert shall be not less than three inches above the outlet ll. The inlet and outlet shall be located opposite each other along the axis of maximum dimension. The horizontal distance between the nearest points of the inlet and outlet devices shall be at least four feet. 12. Sanitary tees shall be at least four inches in diameter. Inlet baffles shall be no less than six inches or no more than 12 inches measured from the end of the inlet pipe to the nearest point on the baffle. OL!tlet baffles shall be six inches ~T.easured from the beginning of the outlet pipe to the nearest point on the baffle.