This manual provides a method for assessing the constraints imposed by existing soil conditions for conventional septic tank systems in British Columbia with discharges of less than 13600 L/day (3000 gal/day). It explains how a soil functions in a septic tank effluent absorption field, why soil constraints should be determined before septic tank systems are installed, which properties of the soil are important to absorption field performance and how those properties can be evaluated and rated. The manual is orientated toward both protection of public health and the environment.
Epp, P.F.. 1984. Soil Constraints for Septic Tank Effluent Absorption. Ministry of Environment. MOE Manual 5