If the FF equals 2.00, PF equals 1.5, and HF equals 24, what is the MLSS?

To determine the value of MLSS (Minimum Liquid Surface Space), we can use the formula that relates the factors given in the question: FF (Flow Factor), PF (Pumping Factor), and HF (Head Factor). The calculation for MLSS can typically be expressed as:

MLSS = FF × PF × HF

Let's substitute the values provided into this formula:

• FF = 2.00

• PF = 1.5

• HF = 24

Now, we perform the calculation:

MLSS = 2.00 × 1.5 × 24

First, multiply the flow factor and the pumping factor:

2.00 × 1.5 = 3.00

Next, multiply that result by the head factor:

3.00 × 24 = 72

Therefore, MLSS equals 72 LF. This means the correct answer is indeed the option that corresponds to 72 LF. This result makes sense within the context of septic systems, as it demonstrates the effective measurement that ensures the system can handle the liquid waste properly. Proper calculations of these factors are critical for the design and operation of septic systems to avoid failures or inefficiencies in waste handling.