What does the formula A(ft2) = 1.6Q/RET calculate?

The formula A(ft2) = 1.6Q/RET is used to calculate the drainfield area needed for an On-Site Sewage Facility (OSSF). In this context, A represents the area in square feet that is required to effectively treat and drain wastewater in a septic system.

The Q in the formula signifies the total daily water usage, typically measured in gallons per day. RET represents the soil absorption rate, giving an indication of how well the soil can absorb and treat effluent. The multiplier of 1.6 is a constant included to adjust the calculation for varying conditions in soil and wastewater.

This formula is essential for determining the size of the drainfield based on the specifics of water usage and the characteristics of the soil, ensuring that the effluent is adequately absorbed and that there are no adverse environmental impacts. By calculating the necessary drainfield area, this formula aids in designing a system that operates efficiently and meets health and safety standards.