Capstone Well Integrity was formerly known as Doull Site Assessments ltd. DSA was acquired by Capstone in April of 2018, bringing in over 30 years of industry experience to the organization. Our mission is to provide our customers with the most accurate and useful data possible by using progressive and innovative technology and methodology. Our services empower our customers to make the most informed, strategic decisions on critical asset integrity matters to ensure they achieve superior efficiency and lower costs. Gas Migration Testing Using a patent pending test method along with state of the art equipment, DSA can effectively identify any signs of gas migration. VentMeter™ Services A remote monitoring system that provides consistent, calibrated daily uninterrupted surface casing data. Oil Sands Well Integrity Testing Over 20 years of experience servicing customers with well integrity and environmental issues unique to oilsands operations. Urban Well Testing / Monitoring / Sampling Trusted expertise and in-depth testing and reporting for abandoned wells located in a variety of urban locations, and near/under surface developments. With the main operations facility in Lloydminster, corporate office in Calgary, and personnel located in other key operational areas, DSA continues to lead the field of well integrity testing and monitoring along with invaluable industry partners. This position as a leading innovator in the energy service sector has been instrumental in the growth and success of DSA's Canadian and International initiatives.