Every pumping visit starts the same way: find the lid. On a house with a riser that takes ten seconds. On a 1970s Colonie split-level where the tank is under 18 inches of lawn and nobody has a drawing, it can take an hour and a shovel. This guide covers the ways we locate buried tanks in the Capital Region, what a riser is and why New York's design standard calls for one, and what it costs when digging is unavoidable.
How do I find my septic tank?
Work through these in order. Most tanks are found by the third step.
1. Check the county health department file
Septic systems in this region are permitted through the county health departments: Albany County DOH, Schenectady County Environmental Health, Saratoga County DOH in Ballston Spa and Rensselaer County DOH. For new or repaired systems the file often includes an as-built drawing with measurements from the house to the tank, the distribution box and the drain field. Some towns, including many in Saratoga County, route homeowner permits through the building department, so try there too. A phone call or FOIL request is usually enough.
2. Read the as-built or the home inspection report
If you bought the house with a septic inspection, the report should say where the lid was opened. Previous owners sometimes leave a sketch in the basement near the main cleanout. Also look at your closing documents: a survey map occasionally marks the tank.
3. Follow the main line out of the house
Go to the basement or crawl space and find where the 4-inch main drain leaves the foundation wall. The tank is almost always in a straight line from that exit, typically 10 to 25 feet from the house. Appendix 75-A, the state design standard, sets minimum separation distances from the dwelling, wells and property lines, so the tank will not be right against the foundation and will not be under the driveway.
4. Look for clues in the yard
A slight depression or a rectangle where snow melts first in winter often marks the tank. A spot where grass grows greener or faster in dry weather is more likely the drain field, which sits downstream of the tank. A visible 4-inch pipe cap or small concrete pad in the lawn may be a cleanout, inspection port or an old lid.
5. Probe
Using a thin metal probe rod, push gently into the soil along the line from the house every foot or so. When you hit something flat and hard about 1 to 3 feet down, trace its edges. Most Capital Region tanks are precast concrete, roughly 5 by 8 feet for a 1,000-gallon tank, with the lid near the inlet end, the outlet end or in the middle. Probe carefully; older tanks can have thin or cracked covers.
6. Camera and electronic locating
When probing fails, a pumping company can run a camera with a locating sonde down the main line from the cleanout. A receiver on the surface tracks the sonde to the tank inlet, and from there the lid is a short measurement away. This is the fastest method on properties with deep tanks, fill dirt, or landscaping, and it avoids random digging across a patio or garden.
Why are so many lids buried?
Older installs in Guilderland, Niskayuna and Troy's hillside neighborhoods were often set with the lid a foot or two below grade and then topsoiled and seeded. Over decades, lawns get regraded, additions get built, and patios get poured. The tank does not move, but what covers it does. Every time it is pumped, someone has to dig.
Should I install a septic riser?
A riser is a watertight extension collar, usually plastic or concrete, that brings the tank's access opening up to ground level with a secure lid. New York's Appendix 75-A design standard says tank covers must be accessible and calls for extension collars when the manhole is more than 12 inches below finished grade. The Town of Rotterdam writes the same rule into its permit process. For a system built today, a riser is part of the design; for an older tank, it is a retrofit.
What a riser does for you:
- No digging at every pump-out, which removes the $50 to $200 locating and digging charge each time.
- Faster emergency service. If the tank backs up at 9 p.m. in February, the crew can open a riser lid through snow; a buried lid in frozen ground is a different job.
- Easier inspections, effluent filter cleaning and baffle checks.
- A clear, lockable lid that keeps kids and pets off the opening.
Typical cost to add a riser and lid runs $250 to $600 as an estimate, and it is cheapest to do while the tank is already open for pumping. Details are on our septic riser installation page.
What does it cost to dig up a buried lid?
Most haulers price locating and hand-digging as an add-on to pumping. Our estimate range is $50 to $200, depending on depth, soil and how much of the yard has to be searched. Several things push it toward the high end:
- Lids deeper than about two feet.
- Frozen ground from December through March, which can double the time.
- Tanks under decks, pavers or dense landscaping.
- No records and no visible cleanout, which means probing a large area.
Camera locating is sometimes billed separately. If you expect a long search, ask for a quote on locating before the truck arrives. Base pumping prices by tank size are listed on our cost page.
Safety when you open a tank
If you find and open the lid yourself, do not lean over the opening or put your head inside. Septic tanks produce hydrogen sulfide and methane, and the gases can overcome a person in seconds. Never leave an open tank unattended, keep children and pets away, and replace a cracked or unstable cover before anyone walks over it. Pumping and inspection are jobs for a crew with the right equipment; see septic tank cleaning for what a full service includes.
After you find it, mark it
Take three measurements from fixed points, such as two house corners and a well cap, to the lid. Write them down and photograph the open lid with the house in the background. Keep a copy with your pumping receipts. If you add a riser, the lid is the marker.
Whether you are in Colonie, Guilderland or Troy, we can locate the tank, pump it and set a riser in one visit. Get a free quote and let us know whether you have an as-built or a cleanout we can start from.