Safety and Environmental Performance


TCO continues to achieve industry-leading safety results in standard industrial safety measurements such as Days Away from Work and Total Recordable Incidents.

Показатели по технике безопасности

TRIR is a Total Recordable Incident Rate. It is a measure of injury and illness cases without lost time, but that have the potential to lead to lost time. As it is an important leading indicator, TCO manages TRIR closely.

DAFW are the incidents that lead to days away from work.

Working safely is a TCO core value and everyone’s responsibility

In 2017, TCO employees and contractors worked over 94.5 million man-hours with four Days Away from Work incidents. While this is truly world-class performance, TCO strives for zero workplace injuries and is continuously working to improve in this area. Living this commitment will ensure success in fatality prevention and process safety, the two cornerstones to incident-free construction and operations.

Contractor Health, Environment and Safety Management Process

The Contractor Health, Environment and Safety Management (CHESM) Process establishes clear accountabilities, ensures active engagement of contractors, and provides a consistent CHESM program to eliminate health, environment and safety (HES) incidents and injuries among contractors.

Process Scope

This process defines a framework for Contractor Health, Environment and Safety Management and applies to almost all contractors working within the area of «Tengizchevroil LLP» (TCO) operational control.

Note: Areas within TCO operational control are locations, equipment, activities, or projects that are owned, operated, leased, or controlled through rights secured by TCO.

The CHESM process applies to all contractors working in TCO operational control. However, resource allocation for process implementation and management are prioritized to those contractors performing high- and medium-risk work.

Environmental Performance

TCO committed to continuous improvement of environmental performance. TCO has invested over 451 billion KZT (or over $3 billion) since 2000 in environmental protection activities which have achieved reductions in flaring and air emissions, improved wastewater treatment and increased the amount of water reuse.

Flaring Reduction

TCO has implemented number of major projects on flaring reduction, including gas processing capacity expansion project, gas export pipeline capacity growth project and gas utilization project.

Since 2000, investments in environmental protection and plant reliability improvement projects have helped TCO reduce total gas flaring volumes by 79%. TCO has successfully conducted significant Turnarounds each year to replace aging equipment and improve existing reliability; replacing equipment often requires flaring to conduct the work safely. 

As of 2009, TCO has eliminated continuous routine flaring of associated gas. Currently the gas flaring at TCO facilities is periodically carried out to ensure safety of personnel and environment, as well as during equipment maintenance and replacement to improve the operational reliability.

Вручение награды за снижение сжигания попутного газа


Tengizchevroil was awarded the prestigious Excellence in Flaring Reduction Award at the 10th Global Gas Flaring Reduction Conference in 2012. The World Bank’s Global Gas Flaring Reduction Partnership recognized TCO as a global leader in flaring reduction, in part due to the success of TCO’s Gas Utilization Program which helped TCO deliver on its commitment to significantly reduce gas flaring.

Rational Water Use

TCO recognizes the value of fresh water as a fundamental social, environmental and economic resource and places great importance on water conservation and emphasizes re-use whenever possible. TCO facilities, like most other water users in Atyrau Oblast, are supplied with fresh water through the Astrakhan-Mangyshlak water pipeline from the Kigash River, one of the Volga River’s channels, because the Tengiz region does not have fresh ground or surface water.

Канализационные очистные сооружения в Тенгизе

TCO’s Wastewater Treatment Facility (WTF) and Water Recycling Facility (WRF) focus on fresh water conservation and wastewater management. TCO’s WTF is designed to treat 6,000 m3/day of sanitary wastewater. The treated wastewater from the WTF provides the WRF influent to produce high-quality water for operational purposes. Operation of the WRF supports TCO initiatives related to fresh water conservation and wastewater management. This facility, commissioned in 2016, is a major component of TCO’s long-term, comprehensive sustainable water management program.

TCO’s WRF, which treats wastewater to technical water quality via reverse osmosis, is designed to produce up to 3,600 m3/day of recycled technical quality water to support TCO operations. The recycled water from operation of the WRF has increased TCO’s annual recycled water rate to over 30% of overall consumption. TCO has a strategy for short-, mid- and long-term water management. TCO is actively evaluating and executing various projects which aim to improve water conservation and awareness, and increase water re-use opportunities.

Waste Management

TCO is exploring opportunities to maintain waste recycling rate of 55% achieved in 2017 and makes considerable efforts for the development of local waste management services. TCO sends more than 25 types of solid wastes for recycling. TCO is furthering RoK’s Green Economy initiative by implementing recycling projects. Paper, cardboard, hard plastic and empty plastic bottles are collected and sent to 3rd parties for recycling and reusing, thus driving establishment of a sustainable waste recycling industry in Kazakhstan.

TCO remains committed to developing local content with our waste recycling partners. TCO continues to identify additional waste treatment opportunities involving third party service providers to increase the range of materials recycled.

Environmental Monitoring

TCO conducts ongoing environmental monitoring including air, water and soil to verify that TCO operations comply with RoK regulations and align with OE expectations for Environmental Stewardship. Our integrated environmental monitoring program is carried out by licensed contractors and data are analyzed by relevant TCO departments. All measurement data is done according to the TCO Industrial Control Program developed in accordance with RoK environmental requirements. TCO has a full RoK accredited laboratory run by a third-party contractor to conduct all data analysis.


There are 12 automated stationary environmental air monitoring stations within and on the boundary of TCO Sanitary Protection Zone in Tengiz. TCO also has fixed monitoring stations in TCO village as well as in the closest settlement, Zhana Karaton, 95 kilometers from Tengiz. A mobile laboratory is used weekly to monitor the area near the plant’s emissions stacks. Readings are taken 16 kilometers upwind from the plants to identify background values for the substances being monitored. Samples are also taken 0.5 to 15 kilometers downwind from the plants and at the border of the Sanitary Protection Zone to monitor air quality.


There are 55 soil sampling sites, identified and sampled annually, for documenting the overall and local soil quality within the TCO partnership area. Sampling sites for soil monitoring are identified considering wind directions to understand if potential contamination may have been spread via wind from outside of the area. Location of sampling sites may slightly change between sampling events depending on the composition of the soil cover, soil status and other conditions.

Groundwater monitoring

TCO performs regular and routine groundwater monitoring to obtain information about the condition of the environment and assess if there have been any impacts from production activity. The first two water-bearing horizons below ground surface are subject to routine monitoring through a network of groundwater observation wells. Unserviceable wells are decommissioned and old or failed wells are routinely repaired or replaced with new wells to provide a competent and comprehensive groundwater monitoring network resulting in reliable groundwater quality results.

Waste water monitoring

Monitoring of waste water, both industrial and sanitary, allows TCO to control the quality of the effluents placed in evaporation ponds and subsurface horizons (industrial water is disposed in injection wells) as well as to measure compliance with established environmental standards of the Republic of Kazakhstan. Waste water is monitored at discharge points into evaporation ponds and injection wells. Frequency of sampling and analysis of samples complies with TCO’s Industrial Control Program developed in accordance with RoK environmental requirements.

Emergency Response and Oil Spill Readiness

Tengizchevroil meets the highest standards of Product Stewardship practices through managing safe transportation and quality control for its sales. A dedicated team of professionals focus on assessment and mitigation of potential health, environmental, safety, and quality risks for the entire product life cycle. This team promotes use of industry product stewardship best practices with customers and service providers through safety and technical audits.

The Caspian Pipeline Consortium (CPC) is the primary route for TCO’s oil production. The 1,500 km long pipeline connects TCO’s Tengiz field to CPC’s terminal on the Black Sea. TCO also maintains contingent pipeline access to the Baltic Pipeline System and rail access to an oil terminal in Odessa, Ukraine. All LPG and sulfur shipments are delivered to customers and terminals via rail transportation routes.

In the event of an incident along the transportation routes of TCO's sales, the services of third party observers are utilized by TCO to liaise with the responsible parties and agencies where the incident occurred. Depending on the severity of the incident, TCO’s Crisis Management team may be activated to coordinate mitigation efforts and address any requests for supplementary support from external stakeholders. TCO’s Crisis Management team can access the experienced resources of Chevron’s World-Wide Emergency Response Team (WWERT). The WWERT is a team of very experienced personnel trained to support the management of global-level (Tier 3) incidents and are available to support any response. Team members are subject matter experts in emergency management and the development of incident action plans.

In addition, TCO retains membership in the OSPRI industry association (Oil Spill Preparedness Regional Initiative (Caspian Sea – Black Sea – Central Eurasia) through shareholder companies to stay current in developments and best practices in oil spill and emergency response.