Langseth Environmental Services offers quality environmental services throughout the Puget Sound Area in Western Washington. Family owned and operated since 1993.

Commercial and Residential Services

• Removal / Decommissioning
• Soil Remediation / Bio Systems
• Site Assessments
• Soil Testing
• Permitting
• Tank Location
• Replacements / Installations
• Pumping / Cleaning
• Slurry Fill
• Landscape Restructuring
• PLIA - Approved


What Should you Know About Heating Oil Tank Decommissionings?
All underground fuel heating tanks which have been out of service for a one-year period, need to be decommissioned according to 2006 IFC 3404. At the time a residence or commercial property is sold or refinanced, the banks will require proof of the tank decommissioning.  

Each city and county within the State of Washington has its own guidelines for decommissioning and its own pricing for the required permits.

A typical heating oil tank lasts thirty years before corrosion causes leaking, but this varies widely depending on the properties of the surrounding soil. A leaking tank will contaminate your soil, and possibly your neighbor’s soil. These oil leaks can also migrate into ground water, which may serve as a source of drinking water. It is also possible that old or unused heating oil tanks will cave in, causing sink holes.

Property Owners Can be Held Liable for Contamination Caused by a Leaking Tank on Their Property.  In fact, past or present ownership of contaminated property may result in liability.
Any cleanup that needs to be done at the site should follow the amended 1996 edition of the Model Toxics Control Act (MTCA), Chapter 173-340 WAC.

If you have an active heating oil tank, you may be eligible for coverage under the Heating Oil Pollution Liability Program (PLIA).


  • Registered Site Assesssor
  • ICC Certified Decommissioning Supervisors
  • Fully Licensed, Bonded, and Insured
  • Contractor License #LANGSES077DU
  • WBE #W2F5019261

Contact Us:
Phone: 253-536-6961
Fax: 253-548-0201
: LangsethEnviro@gmail.com

7517 Portland Ave. E.
Tacoma, WA 98404-3323


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