Septic tank servicers and sewer pipe cleaners need knowledge in the following areas:

• Customer and Personal Service: Providing special services to customers based on their needs.
• Transportation: The methods and costs for moving people, goods, and materials.
• Mechanical: The design, use, and repair of machines and tools.
• English Language: The meaning and use of the English language.
• Public Safety and Security: How to protect people and property.
• Mathematics: The rules and uses of numbers.
• Administration and Management: How to run a business or group.