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This document is an instructional module package prepared in objective form for use by an instructor familiar with water stabilization and deposition and corrosion control in a water supply system. Included are objectives, an instructor guide, student handouts and transparency masters. The module considers water stability, water chemistry, deposition, deposition control, corrosion and corrosion control. This is the first level of a two module series. (Author/RH)

This document is an instructional module package prepared in objective form for use by an instructor knowledgeable in the chemistry of water stabilization and familiar with control of deposition and corrosion in a water supply system. This is the second level of a two module series. Included are objectives, instructor guides, student handouts and transparency masters. The module considers the stability analysis of a water, the chemistry of scale formation, and the chemistry of corrosion and corrosion control. (Author/RH)

This document is an instructional module package prepared in objective form for use by an instructor familiar with operation and maintenance of rotating biological surface (RBS) wastewater treatment systems. Included are objectives, instructor guides, student handouts and transparency masters. This is the second level of a three module series. The module considers the role and function of the RBS unit, factors affecting unit performance, solutions to adverse situations, design approaches, maintenance and reporting requirements. (Author/RH)

This document is an instructional module package prepared in objective form for use by an instructor familiar with operation and maintenance of a rotating biological surface (RBS) wastewater treatment system. Included are objectives, instructor guides, student handouts, and transparency masters. This is the third level of a three module series and considers the biology and biochemistry of biochemical oxygen demand (BOD), reduction and nitrification in the RBS process, system applications, process performance and measures to assure proper plant performance. (Author/RH)

This document is an instructional module package prepared in objective form for use by an instructor familiar with operation and maintenance of rotating biological surface (RBS) wastewater treatment systems. Included are objectives, instructor guides, student handouts and transparency masters. This is the first level of a three module series. The module considers purpose, functions, factors affecting process, process control and operation and maintenance of a RBS system. (Author/RH)