Sec. 470.315. - Percolation test and rate.

(a) A percolation test, when required under this Chapter, shall be performed in the following manner: (1) The test shall be made in a hole not less than four nor more than 12 inches in diameter, with vertical sides, bored into the depth of the proposed absorption trench. (2) The bottom and sides of the hole shall be carefully scratched to remove any smeared soil surfaces. All loose material shall be removed from the hole, and two inches of fine gravel shall be added to prevent scouring. (3) The hole shall be filled with clear water to a minimum depth of 12 inches. That water level shall be maintained for 15 minutes by adding water as necessary. (4) Thereafter, the length of time in minutes for the first three-inch drop, when divided by three, is the percolation rate. (b) The Director may require that a percolation test be made in his presence. (c) No percolation test shall be made in filled ground unless the soil: (1) Has been thoroughly and mechanically compacted. (2) Has settled for at least six months. (Ord. 70-650-526; Ord. 71-435-150, § 7; Ord. 71-397-181; Ord. 83-591-400, § 1) Note— Former § 624.315.