Vision & Values

A true service company We are in the business of providing effective HSE-oriented solutions for the handling, processing, and treatment of waste materials. OTS products are designed in accordance with true environmentally friendly principles. Our personnel are highly experienced, but, most importantly: Our dedication to making improvements on behalf of our clients is genuine Strategic […]


OTS runs and operate a number of small and larger clean up operations, tank cleaning, general rig cleaning not listed above.

About Onsite Treatment Services

OTS is a privately owned company, established in Stavanger in 2001, which has progressively built up knowledge through experience in the rental and service area for the oil and gas industry. We are a supplier of Waste Water Treatment Units, WWTU,  cuttings & fluids transportation, well services pumps, Filtration units for filtration of slop and […]

General sales & rental conditions

These General Sales Conditions shall be applicable between companies of Onsite Treatment Services and Purchaser, unless otherwise agreed by written agreement between the Parties. These General Sales Conditions form a part of the agreement.

QHSE & Certificates

We will conduct our business in compliance with laws and regulations and in such a way that our activites have minimal impact on the environment. OTS aims to provide services that enable organisation to identify & qualify, evaluate, and monitor suppliers throughout the supply chain. Quality policy: Onsite Treatment Services AS (OTS) shall continuously develop […]


OTS provides service personnel for safe operation of our equipment. A reliable problem solver As the working conditions often are as demanding as the challenges we are solving, OTS personnel are as tough as they come. At the same time we are humble towards the seriousness of our trade and have a deep respect for […]