Tennessee Wastewater Operator Practice Exam

What type of biosolids is generally available to the public?

1. Class B

2. Class C

3. Class A

4. Class D

The correct answer is: Class A

Class A biosolids are treated to a level that significantly reduces pathogens and meets specific standards set by regulatory agencies, making them safe for public use. These biosolids have undergone a rigorous treatment process, which may include high-temperature drying or advanced stabilization techniques, ensuring they do not pose health risks to humans or the environment. Due to their high quality, Class A biosolids can be utilized in a variety of applications, such as land reclamation, agricultural fertilizers, and landscaping projects, and can even be distributed to the general public. This level of treatment not only enhances safety but also allows for potential beneficial uses, connecting proper wastewater treatment practices with sustainable environmental practices. In contrast, other classes of biosolids, such as Class B, are treated to reduce pathogens but do not meet the stringent criteria of Class A, which limits their distribution and public accessibility. Class C and Class D do not typically exist in the regulatory classifications for biosolids in the context of public availability and usage, reinforcing the significance of Class A as the appropriate type for general public use.