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A & T Excavation

Septic contractor based in Duluth, St. Louis County, MN

License details

CompanyArin M Olson
License numberL3156
License typeSSTS Installer · Service Provider · Pipelayer
License statusCurrent
License expiresNovember 8, 2026: the expiry date in our copy (as of October 3, 2026) has passed. Check with the issuing agency.
Based inDuluth, St. Louis County, Minnesota 55803

"Based in" is the city and county of the address on the business's license record.

What this license covers

  • Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
  • Service: licensed to operate and service advanced treatment systems on an ongoing contract.
  • Pipelaying: licensed to install the sewer line running from the building to the septic tank.

How to check 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 #L3156 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Source: Minnesota Pollution Control Agency (MPCA) - SSTS licensed business list, last checked 2026-10-03. Check current status at the state agency website.

GroundRoster is an independent publisher of public licensing records, not a government agency or licensing board. The business has not claimed this listing and is not affiliated with GroundRoster. Always confirm current license standing with the issuing state or county agency before hiring.

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