This document is an instructional module package prepared in objective form for use by an instructor familiar with the laboratory procedures for determining the complete series of solids analyses on wastewater and wastewater sludge samples. Included are objectives, instructor guides, student handouts and transparency masters. This module considers total solids, total volatile solids, total suspended solids, volatile solids, dissolved solids, settleable solids, percent solids and percent volatile solids. (Author/RH)