1. Introduction
   1. Subsidence
      1. Table: Settling Rates by Particle Size
   2. Stokes' Law
2. Coagulation
   1. Inorganic Coagulants
   2. Coagulation Reactions
   3. Coagulant Equivalents
      1. Table: Coagulant, Acid and Sulfate- 1ppm equivalents
   4. Alkalinity Relationships
      1. Table: Alkali and Lime- 1ppm equivalents
   5. Organic Coagulants: Polymers
3. Flocculation
4. Color Removal
5. Clarification (Mechanical)
   1. Conventional Clarification
      1. Figure: Large Tank Clarifier
      2. Figure: Horizontal Basin Clarifier
   2. Upflow Clarification
      1. Figure: Solids-Contact Clarifier
      2. Figure: Sludge-Blanket Clarifier
      3. The Solids-Contact Clarifier
      4. Sludge-Blanket Clarifier
6. Troubleshooting Tips
   1. Application Pointers
   2. Table: Floc Problems and Solutions