Fats, oils and greases foul up sewage treatment plants so much that new state and federal laws now regulate their discharge.
For the past few years, I have been teaching a plumbing engineering class at Harold Washington College in Chicago. The class is made up of students who are designers, engineers, sales representatives and contractors.
Every so often, I like to assign homework that gets the brain thinking. Last week, I asked the question, "What is the state limit of FOGs in the sanitary waste?"