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A Risk-Based Approach For Examining Vertical Separation Distances In On-Site Wastewater Treatment Sytems, Anthony M. Janicek
A Risk-Based Approach For Examining Vertical Separation Distances In On-Site Wastewater Treatment Sytems, Anthony M. Janicek
ETD Archive
Regulations regarding the use of on-site wastewater treatment systems in many states lack a sufficient scientific basis, which in many cases restricts the use of on-site systems, drives up cost, and restricts innovation of new treatment technologies. Of particular regulatory concern is the minimum vertical separation distance (VSD) located in the area between the trench bottom of the subsurface soil absorption system and any restricting or limiting layer. The minimum VSD needed for proper effluent treatment is based on many complex and interrelated factors regarding physical, chemical, and biological soil conditions at a particular site. Research has shown that depending …