How many settlement survey points are required for an AST that is 180 feet in diameter?

How many settlement survey points are required for an AST that is 180 feet in diameter?

• A. 12
• B. 19
• C. 18
• D. 10

Answer: (C)

The number of settlement survey points required for an aboveground storage tank (AST) is generally determined based on the size of the tank, particularly its diameter. For a tank that is 180 feet in diameter, the proper number of survey points is calculated to ensure that adequate data is collected to assess any potential settlement issues. In accordance with industry guidelines, including those outlined in API standards, the recommendation is to have a sufficient number of settlement survey points to cover the structure adequately while also considering the geometry of the tank. A tank with a larger diameter necessitates a greater number of points to accurately monitor and evaluate the uniformity of the foundation and the tank's structural integrity. The correct choice of 18 settlement survey points is in alignment with standard practices for assessing tanks of this size, providing a comprehensive view to detect any uneven settling or shifts. Each point contributes to a better understanding of the tank's base conditions over time, facilitating early detection of issues that could compromise the tank's operation or safety. Thus, for an AST with a diameter of 180 feet, utilizing 18 settlement survey points represents a balanced approach to thorough monitoring while keeping logistical considerations in mind.

The number of settlement survey points required for an aboveground storage tank (AST) is generally determined based on the size of the tank, particularly its diameter. For a tank that is 180 feet in diameter, the proper number of survey points is calculated to ensure that adequate data is collected to assess any potential settlement issues.

In accordance with industry guidelines, including those outlined in API standards, the recommendation is to have a sufficient number of settlement survey points to cover the structure adequately while also considering the geometry of the tank. A tank with a larger diameter necessitates a greater number of points to accurately monitor and evaluate the uniformity of the foundation and the tank's structural integrity.

The correct choice of 18 settlement survey points is in alignment with standard practices for assessing tanks of this size, providing a comprehensive view to detect any uneven settling or shifts. Each point contributes to a better understanding of the tank's base conditions over time, facilitating early detection of issues that could compromise the tank's operation or safety.

Thus, for an AST with a diameter of 180 feet, utilizing 18 settlement survey points represents a balanced approach to thorough monitoring while keeping logistical considerations in mind.