Aerobic System Pumping Services

Knowledge Is Everything -- And What You Don’t Know CAN Hurt You
If there is electricity to your system, you will need to turn it off at the breakers in the outside control box before the system is pumped.
Fill the aeration tank with water from a garden hose before the electricity is turned back on at the breaker. If you turn the breakers on before the aeration tank is filled with water, there is a chance the air compressor (or aerator) will break. The pumping company representative can show you which tank is the aeration tank, if you don’t already know. When you see the water begin to spill into the effluent (pump-out) tank, you can be sure the aeration tank is full. Do not fill the tanks up from running water inside your house – if you do, you use much more water than you need to because you have to fill up the pre-treatment (trash) tank before water can begin to fill the aeration tank.
The maximum liquid level for a tank is measured from the bottom of the tank to the invert of the outlet pipe. Note whether levels have exceeded the maximum or if the level has dropped without the tank being pumped out (an indication of leak). Measure the current level in the tank with respect to the outlet. Measure the alarm activation level in the tank with respect to the outlet. Measure the alarm activation level from the invert of the outlet pipe.
Check the inlet to evaluate flow into the tank. Normally, the flow will start and stop due to use in the home. Continuous flow may indicate a plumbing leak.
A property functioning septic tank will have three distinct layers: scum, clarified effluent (a clear zone), and sludge (see image below).
Check for the presence of these three layers by using a sludge judge or similar device. Heavy flocculation in the clear zone is an indicator of a need for pumping. Absence of any one of the layers should lead to further evaluation. Common causes of this would be the use of septic tank additives, the excessive use of antibiotics or toxic cleaning chemicals, or the presence of a water softener or other water treatments that discharge into the tank. Any of these will affect bacterial activity and some will affect how solids separate in the tank. The depth of sludge/scum accumulation should be measured with respect to the bottom of the outlet baffle.
Make a note of the date of the last pumping on the tank.
Local regulations may dictate pumping frequency or provide maximum sludge/scum accumulation before pumping is required. The depth of sludge/scum accumulation can be measured with respect to the depth of the outlet baffle. The scum layer should be at least 3 inches above the bottom of the outlet baffle and the sludge should be at least 12 inches below the baffle. The clear zone should be about 67-75 percent of the operating tank volume or liquid depth. In other words, the combined depth of the scum and sludge should not exceed 25-33 percent of the total liquid depth.



Phone:  830-935-4936 or 830-935-4976 Email Us  23011 FM 306, Canyon Lake, TX 78133