Study Guide Answer Key

Here are the answers to the Sept. 24, 2020 edition of TPO's Exam Study Guide: 1. While performing a daily walk-through at an aerated lagoon treatment plant, you notice surface bubbling throughout the primary lagoon, except in one area. In this area, the surface is calm and uninterrupted. What is the most probable issue?The answer to this question is B. Performing visual inspections is very important no matter what form of treatment facility. In a lagoon system using aeration systems, the surface turbulence will tell the operator many things about the performance of his/her plant. A calm area over a diffuser will usually mean