87.25.2.Installation conditions in structured clay or silty clay soil: A leaching field may be installed in the following conditions:
(a) the soil at the disposal site is impermeable solely because its texture is in the impermeable zone identified in Schedule 1 and, based on the hydraulic conductivity test or the percolation time test, the soil at the disposal site is permeable or low permeability soil. For the determination of the level of soil permeability, the result obtained by the correlation method must, however, be excluded;
(b) the level of bedrock, underground water or any layer of impermeable soil is situated at least 30 cm under the surface of the disposal site;
(c) the grade of the disposal site meets the requirements of paragraph a of section 87.19;
(d) the leaching field meets the requirements of paragraph b section 87.19; and
(e) the soil at the disposal site meets the requirements of paragraph c of section 39.1.1.