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→Additional step for system without underdrain
===Additional step for system without underdrain===
===Additional step for system without underdrain===
*Step 4: Determine maximum permissible ponding depth (''d<sub>p</sub>''):
* Step 4: Determine maximum permissible ponding depth (''d<sub>p</sub>''):
<math>d_{p}=\frac{f'\times48}{0.4}</math>
<math>d_{p}=\frac{f'\times48}{0.4}</math>
{{Plainlist|1=Where:
{{Plainlist|1=Where: