Design Criteria for Soil Absorption Systems

(1) Every soil absorption system shall consist of one or more trenches, beds, fields, pits, galleries or chambers. (2) Effluent disposal area requirements shall be determined in accordance with 310 CMR 15.242. (3) System designs employing equipment designed to distribute effluent without the use of aggregate (i.e., "gravelless systems") are prohibited except in accordance with the procedures set forth at 310 CMR 15.280 through 15.288. (4) Soil absorption systems for Class III and IV soils with percolation rates greater than 60 minutes per inch shall not include beds or fields except in accordance with 310 CMR 15.245(4).