Free answers

Wastewater Lab Topics

Short, plain-language answers from the free course Laboratory Fundamentals.

• What Is BOD?
• What Is a Representative Sample?
• What Is a Grab Sample?
• What Is a Composite Sample?
• What Is Holding Time for a Lab Sample?
• What Is Dissolved Oxygen (DO)?
• How Do You Read a DO Probe?
• What Is TSS (Total Suspended Solids)?
• What Is the Settleable Solids Test?
• What Does pH Tell an Operator?
• What Is Chlorine Residual?
• What Is COD, and How Is It Different From BOD?
• How Do You Read a QC Control Chart?