This document is an instructional module package prepared in objective form for use by an instructor familiar with the use of safety equipment to prevent accidents, injury and loss of life to personnel while inspecting or working in sewer manholes or in confined areas of wastewater treatment plant. Included are objectives, instructor guides, student handouts, and transparency masters. This module considers purposes and types of manholes, a safety checklist, and proper use of safety equipment. (Author/RH)