How Septic Quotes and a Pumping Visit Work in Chattanooga

1. Finding the tank and the lid

If the tank has a riser, this takes a minute. If not, the technician follows the sewer line out from the house, probes the lawn with a steel rod and digs down to the lid, usually 12 to 24 inches in this area’s clay. Concrete tanks often have two or three lids: one over the inlet, one over the outlet and sometimes a center access. The permit drawing from Hamilton County Groundwater Protection (or the TDEC file for Bradley County) shows where the tank was supposed to go. Ask for the locating fee up front; it is the most common surprise on an invoice.

2. Looking before pumping

The liquid level is checked before anything is removed. A level at the bottom of the outlet pipe is normal. A level above it suggests the drain field is not accepting water; a level well below it suggests the tank is leaking. The technician measures the sludge and scum layers, which is the real basis for a pumping interval, and looks at the inlet and outlet baffles or tees and the effluent filter if the tank has one.

3. Pumping the tank

The vacuum hose goes in through the access lid and both the liquid and the solids are removed; a pump-out that leaves the sludge behind is not a cleaning. Heavy or compacted sludge is broken up with the hose or a backflush of liquid, and some companies rinse the walls. A 1,000-gallon tank, the Tennessee size for a four-bedroom house, normally takes 20 to 40 minutes to empty. The load goes to a treatment plant or a TDEC-permitted land-application site, and the pumper logs the address, gallons and discharge location on the state’s monthly form.

4. Inspecting the empty tank

With the tank empty, the technician checks the baffles (concrete baffles on 1970s–80s tanks rot away and let solids reach the field), the condition of the walls and seams, the lid for cracks, and the outlet filter, which is rinsed back into the tank or replaced. If the house has a pump chamber, the floats and alarm are tested. Problems found here are quoted as small repairs; a field that will not take water is noted as a finding, and an inspection determines what comes next. See septic repair.

5. Noting levels and the field

A good report records the liquid level found, the sludge and scum depths, baffle and filter condition, and a walk over the drain field looking for wet ground, surfacing effluent or unusually green grass. For a septic inspection booked for a sale, companies may add a dye test, a hydraulic load test or a camera scope of the lines.

6. The written report

You should leave the visit with a written summary: tank size, levels, what was found, photos of any defect, the next suggested pumping date and a separate price for any recommended repair. Keep it with your house papers. The Tennessee Residential Property Disclosure asks sellers about sewer and septic defects, and TCA 66-5-212 requires disclosing known percolation test results and sinkholes, so the record has value beyond the next pump-out.

7. The county Inspection Letter, a separate product

If you are selling, understand that the pumper’s report and the county’s letter are two different things. Hamilton County Groundwater Protection sells an Inspection Letter ($105) and a Recertification Letter ($180); the county inspector visits with the tank open, which is why sellers usually schedule the pump-out first. TREC Rule 1260-02-.37 requires real estate agents to tell buyers such a letter is available for a fee, but nothing in Tennessee law requires a passing septic inspection to close, and a home-inspection report must state by law that it does not address sewage disposal (TCA 62-6-302). More in selling a house on septic in Tennessee.