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Leeker Construction CoLicensed

Licensed septic contractor based in St. Louis, MO

License details

License number35957 (installer), 50847 (inspector)
License typeOnsite Wastewater Installer - Advanced · Onsite Soil Evaluator · Onsite System Inspector
License statusCurrent registration
License expiresJune 30, 2027
Based inSt. Louis, Missouri
Counties declared to the stateBenton, Camden, St. Charles, St. Louis

"Based in" is the city on the business's license record.

What this license covers

  • Site testing: licensed to run percolation tests and evaluate soils to determine what kind of system a site can support.
  • Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
  • Inspection: licensed to inspect existing septic systems; the license you want for a home-purchase inspection.

How to verify this license

We publish the license details exactly as they appear in the public licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #35957 (installer), 50847 (inspector) directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Source: Missouri registered onsite wastewater treatment system (OWTS) installers + Missouri registered onsite soil evaluators + Missouri licensed onsite system inspectors/evaluators, last checked 2026-08-16. Look it up at the issuing agency.

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