Section 170.130  Greasing Pits

a)         Every existing greasing pit within a building, or enclosed by three or more walls, shall be ventilated by a vent duct not less than six inches in diameter (or equivalent cross-sectional area if a noncircular duct is used). Duct shall start within four inches of the floor and shall be extended on an upward diagonal or by an easy bend over to sidewall, thence straight up through roof to a height sufficient to draw off gasoline vapors which may accumulate in bottom of pit. Abrupt bends must be avoided and all joints must be tight. Floor of pit should pitch slightly toward corner where duct is located, to facilitate flow of vapors to duct.

b)         Flammable and combustible liquids shall never be used to clean out any pit, whether pit is located within a building or enclosure, or outside in the open.

c)         No sewer connection shall be permitted from any greasing pit, unless protected with a grease trap in conformity with the Illinois Plumbing Code (77 Ill. Adm. Code 890) which will effectively intercept greases and oils and prevent their entry into the sewer. Trap shall be kept cleaned out.

d)         If electrically lighted, globes shall be of vapor-proof construction and wiring shall be in conduit.

(Source:  Amended at 9 Ill. Reg. 9514, effective October 1, 1985)