Construction of Elevated Sand Mound Systems for Renovation of Treatment Tank Effluent

摘要

This report presents methodology for site evaluation, design, construction, operation, and maintenance of elevated sand mound sewage disposal systems. it is intended to improve builder expertise in this field so that the unacceptably high failure rate which has been experienced with elevated sand mound systems in the past can be reduced. An extensive literature review was conducted in order to obtain information concerning on-site sewage disposal in general and elevated sand mounds in Pennsylvania in particular. The literature review revealed that there have been conflicting reports regarding the rate of failure of elevated sand mound systems in various states. The common thread revealed in the literature review was that faulty construction has, in many cases, led to hydraulic failure of elevated sand mound systems. The writer has developed a series of recommended construction practices. Checklists address pre-construction planning and builder quality control. Design tables and worksheets are provided to enable rapid design of an elevated sand mound system for a single family residence. Finally, a maintenance and operation fact sheet is provided for use by the homeowner.