Wastewater treatment systems for safety rest areas

TLDR: In this article, design guidelines for rest-area wastewater treatment systems that are capable of complying with the requirements of PL 92-500 are presented and guidance for determining wastewater flow and constituent concentration.

Abstract: Design guidelines for rest-area wastewater treatment systems that are capable of complying with the requirements of PL 92-500 are presented. Also presented is guidance for determining wastewater flow and constituent concentration. Each wastewater treatment system presented (septic tanks, lagoons, extended aeration package plants, trickling filters, rotating biological filters, land treatment systems, intermittent sand filter systems, and disinfection) includes a process description, a discussion of the performance, flexibility, reliability, and operational procedures, preliminary design formulations, and references and selected bibliography. Also included is a flow chart showing a general design proceudre for new and existing rest areas with emphasis on water supply needs and wastewater treatment systems. /FHWA/