Nobody Knew Where It Was: Locating, Pumping, and Inspecting a 1970s Septic Tank for a Home Sale on Randolph Avenue, Landrum, SC

Janice called from Landrum. She was selling her house on Randolph Avenue, a 1970s-era place she knew was on septic, and her agent had flagged the system as an outstanding item before closing. The buyer wanted documentation. Janice didn't have any.

She didn't know where the tank was. She didn’t have either paperwork from the original installation, nor permit records. No previous owner who'd left a note about it. Just a house that had been on septic since the early 1970s and a yard where the tank had been sitting underground, completely unmarked, for half a century. She found us on Google and called the same day she got the request from her agent. We came out the same day she called.

South Carolina has no statewide law that automatically requires a septic inspection as part of every residential real estate transaction. But in practice, buyers almost always ask for one and for good reason. When you're purchasing a property on septic, you're taking on responsibility for a system that could be 30, 50, or 70 years old. If it fails within a year of closing, that's the new owner's problem.

What this means for sellers: the inspection isn't technically mandated by the state, but it's routinely written into sale terms by buyers' agents, required by certain lenders, and expected as a standard disclosure item in most Upstate SC transactions. Refusing to have the system inspected makes the sale harder and hands the buyer a negotiating chip. Janice's situation was common. The system had worked without incident for decades. She simply didn't know where it was, had never had it serviced, and now needed documentation before closing could proceed. One call, one same-day visit, one letter. That's what it took.

In most Upstate South Carolina real estate transactions, the seller arranges and pays for the pump and inspection, either proactively before listing or in response to a buyer's request during the due diligence period. Buyers occasionally commission their own inspection if they want an independent assessment. Either way, the licensed contractor issues the documentation to whoever requested the service.

There's no universal rule, and agents handle it differently. What matters is that the inspection happens within a window the buyer accepts, usually within 30 to 90 days of closing and that the documentation comes from a licensed septic contractor, not a home inspector guessing from the surface. Janice arranged it herself. Her agent had made clear that the buyer needed something in writing before they'd proceed. She handled it without waiting to be asked twice.

This is the part of the job that doesn't show up on a standard service ticket, but every technician who works older properties in this county knows it well. When we pulled up to Randolph Avenue, we knew we were looking for a tank that had been in the ground for roughly 50 years with no documentation of its location. That's not an unusual situation for houses in this part of Pickens County. The 1970s building boom in the Upstate produced a lot of homes on septic systems that were installed, covered up, and never mapped.

By the time someone needs to sell, there's no stake, no survey mark, no memory of where it went. Ford started in the yard with a probe rod: a long metal tool pushed into the soil at measured intervals, feeling for the resistance of a buried structure beneath the surface.

The probe search gave partial signals but not a clean read. The soil had been disturbed enough over five decades that the ground wasn't giving a definitive answer from above.

So Ford went under the house. He crawled into the crawlspace beneath the 1970s structure and worked his way back through the tight framing to where the main drain line exited the foundation.

From beneath the floor, you can see exactly which direction the drain line travels when it leaves the house. That bearing tells you where to probe and where to dig. Ford came back out of the crawlspace, adjusted the search zone, and probed again with the specific direction in mind. The tank was there.

Ford lifted the concrete slab lid with straps. What came into view was a concrete block tank: cinder block walls, hand-laid, original to the house.

This is more common in older Upstate SC properties than most homeowners realize. Before precast concrete tanks became the regional standard, installers in the Landrum, Spartanburg, and Gaffney areas often built tanks in place using concrete masonry units with cinder blocks mortared together in the ground. They were constructed to code at the time and many are still functioning. But they age differently than precast or polyethylene: the mortar joints are the vulnerable point, and after 50-plus years in the clay soils that run through Pickens and Spartanburg counties, those joints have typically seen some movement and moisture infiltration.

The tank held approximately 1,000 gallons and was at capacity when we opened it. That's not surprising for a system that had likely never been serviced.

Once empty, John inspected the tank interior: wall integrity, baffle condition, the inlet and outlet connections, the access structure. The baffles were intact. The outlet pipe was clear. The walls showed the expected age, 50 years of use in Landrum clay, but no active structural failure, no collapse risk, no evidence of immediate regulatory concern. The system was functioning at time of service. That's what the letter needed to say, and it was the honest answer.

After pumping and inspecting the tank, we issued Janice a letter of approval for her home sale.
In South Carolina, SC DHEC does not issue a standardized point-of-sale inspection certificate for existing residential septic systems. DHEC's primary role in septic is permitting for new installations, replacements, and repair work that requires system modification. For home sales, what the market has settled on is a signed letter from a licensed septic contractor, on company letterhead, stating that the system was serviced on a specific date, the tank was pumped, the accessible components were inspected, and the system was found to be in acceptable operating condition at time of service.

This letter is not a warranty that the system will run without issue for the next 20 years. Nobody can make that promise without a full DHEC-compliant soil analysis and an inspection of every system component. What it does provide is professional documentation: a licensed contractor looked at this system, pumped it, and found no immediate issues on the date of service. That's what buyers and their agents are actually asking for and in most Upstate SC real estate transactions, it's what moves the closing forward.

The yard went back together. Janice had her letter. The sale moved forward.

The total cost to Janice was $400. That covered the tank location, both the probe search and the crawlspace investigation, excavation to the concrete lid, pump-out of the full 1,000-gallon tank, inspection of all accessible components, backfill, and the letter of approval. For a line item that can hold up a closing, $400 is a straightforward number. At $400, it's a line item most sellers can handle without a second call. It clears the checklist before the due diligence deadline.

A pump and inspection for a home sale in Upstate South Carolina typically runs $350–$600 depending on tank size, site access, and whether the tank needs to be located before service can begin. When a tank is already mapped and accessible, the job runs faster. When it needs to be found first, as it did on Randolph Avenue, the location work adds time but stays within the same cost range for a standard residential system. No discounts were applied. Janice paid in full on completion.

Janice needed a letter. Her buyer needed confidence. The tank had been in the ground for 50 years without anyone knowing exactly where it was. Ford went under the house, traced the pipe, and found it. We pumped it the same day. The system was in acceptable condition. The letter went to her agent. The closing moved forward.

The job was done at exactly what she'd been quoted. Home sales run on timelines. When a buyer or an agent puts a septic inspection on the due diligence list, it doesn't wait. We show up when we say we will, and we give sellers something in writing they can hand across the table.

— John Rusev, Rock Solid Septic ~ Excavation
Inman, South Carolina · Spartanburg · Greenville · Cherokee · Pickens · Anderson Counties