1. What is Septic Tank Soakaway Size Calculation?

The Septic Tank Soakaway Size Calculation determines the required drainage area for a septic system based on the number of persons served and the soil percolation rate. This ensures proper wastewater disposal and prevents system failure.

2. How Does the Calculator Work?

The calculator uses the soakaway area formula:

Where:

• \( A \) — Required soakaway area (m²)
• \( P \) — Number of persons served
• \( V_p \) — Percolation value (s/mm)

Explanation: The formula calculates the minimum drainage area needed based on wastewater load and soil absorption capacity.

3. Importance of Soakaway Area Calculation

Details: Proper soakaway sizing is essential for effective wastewater treatment, preventing groundwater contamination, and ensuring long-term system functionality.

4. Using the Calculator

Tips: Enter the number of persons and the percolation value obtained from soil testing. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a percolation test?
A: A percolation test measures how quickly water drains through soil, indicating the soil's absorption capacity for septic systems.

Q2: How is the percolation value measured?
A: The percolation value is typically measured in seconds per millimeter (s/mm) drainage rate during standardized soil testing.

Q3: What factors affect soakaway size?
A: Soil type, wastewater volume, and local regulations all influence the required soakaway size for a septic system.

Q4: Are there minimum requirements?
A: Yes, most jurisdictions have minimum soakaway size requirements based on bedroom count or person capacity.

Q5: When should professional consultation be sought?
A: Always consult with licensed professionals for septic system design and installation to ensure compliance with local codes.