Natech Accident
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Type
Natech Accident
Date
2020/04/07
Status
Published

Units Involved

  1. Name
    Trans-Ecuadorian Pipeline (SOTE)
    Type
    Transport: Pipeline
    Description
    State-owned oil pipeline which spans 498 km (309 miles) and brings oil from the Amazon basin across the Andes and to refineries on the Pacific coast.
    This pipeline pumps an average of 340,165 barrels per day (bpd) from the Amazon oilfields to the Esmeraldas port.
  2. Name
    Poliducto Shishufindi-Quito
    Type
    Transport: Pipeline
    Description
    State-owned pipeline for domestic fuel transport.

Event Sequences

  1. Name
    Pipeline rupture due to landslide
    Unit
    1. Trans-Ecuadorian Pipeline (SOTE)
    Description
    Following the collapse of the San Rafael Waterfall (02/02/2020, previously the highest in Ecuador at 46 meters/150 feet), the rainy season in Ecuador accelerated the on-going regressive erosion of the Coca river, triggering a landslide on the 7th of April 2020. As a result of the landslide, the oil pipelines (i.e., state-owned SOTE and privately-owned OCP Ecuador oil pipelines) along the affected area were exposed and ruptured, causing the spill of 15,800 barrels of crude oil into the Napo and Coca Rivers. This oil spill was the country's third since 2009 and the most severe, causing the worst environmental catastrophe Ecuador has seen in more than a decade and putting the life of 27,000 Indigenous people at risk.

    River samples taken by six communities located on the banks of the Coca and Napo rivers in Sucumbíos and Orellana provinces (19-20/09/2020) showed the continuous presence of hydrocarbons and heavy metals into the river.
    Substances Involved
    1. Name
      Nickel carbonyl
      CAS No
      13463-39-3
      Description
      Involved quantity of nickel above limits: 19.95 - 26.26 mg/ kg (acceptable limit: 19 mg/ kg).
    2. Name
      Vanadium
      CAS No
      7440-62-2
      Description
      Involved quantity of vanadium above limits: 79.5 mg/ kg (acceptable limit: 76 mg/ kg).
    3. Name
      Lead
      CAS No
      7439-92-1
      Description
      Involved quantity of lead above limits: 20.17 - 3638.53 mg/ kg (acceptable limit: 19 mg/ kg).
    4. Name
      Hydrocarbons
      CAS No
      308067-53-0
      Description
      Involved quantity of hydrocarbons above limits: 219.1 - 27688.45 mg/ kg (acceptable limit: < 150 mg/ kg).
    5. Name
      Polycyclic aromatic hydrocarbons
      Description
      Involved quantity of polycyclic aromatic hydrocarbons above limits: 1.77 mg C/ kg (acceptable limit: 0.1 mg C/ kg).
    Initiating EventCritical EventMajor Event
    Component (Structural): Pipeline break / damage
    A landslide, triggered by the flooding of the Coca river, caused the rupture of the SOTE pipeline.
    Release: Liquid release to water body
    Hydrocarbons flowed into the Coca River, a tributary of the Napo River, which reaches into Peru.
    -

Weather Conditions

Precipitation
Rain
Temperature
12 °C
Average Wind Speed
7.5 m/s
Dominant Wind Direction
South
Description
Rainy season in Ecuador that accelerated the on-going "regressive erosion" phenomenon at the Coca River in Ecuador. Rain and flooding have been reported. Could have facilitated the flow of the spilled hydrocarbon into the river.

Emergency Response

Response Planning Activities
1. Humanitarian aid to affected communities

More than 1.3 million liters (343,000 gallons) of water and more than 18,000 food kits, and has served more than 112 communities and more than 5,000 patients through medical brigades visiting the area.

2. Construction of bypass lines for each of the two pipelines that collapsed

Petroecuador has built two bypass lines for each of the two pipelines (SOTE and polyduct) that collapsed in April 2020, which has allowed it to move between 200 and 400 meters (660 and 1,310 feet) from the riverbed of the Coca River, especially at the confluences of the Marker and Montana rivers.
The first bypass for SOTE was built in April, running 1.75 km (1.09 mi); construction on the second began in May and will run 1.1 km (0.7 mi). The first bypass for the polyduct, meanwhile, runs 1.32 km (0.82 mi) and the second 1.8 km (1.1 mi).
A third bypass is planned for SOTE that will have an extension of 0.79 km (0.49 mi).
Response to the Natural Hazard
Construction of emergency infrastructure to mitigate the regressive erosion of the river

Phase 1 (scheduled to start from the 15th of July, 2020):
- construction of a ramp that will be set in the river;
- expansion of the channel to alleviate the force of the flow.

Phase 2
- commissioning a series of complementary hydrogeological, topographic, and geological studies (to be completed no later than Sept. 15);
- designing the new infrastructure (by Aug. 1, which must be completed by Oct. 1); and
- constructing the infrastructure (start in October, duration between seven and eight months to complete).
Difficulties in Response to the Natech Event
Damage to lifelines (e.g. water, power, communication, transportation): Yes
Response Teams and Equipment Involved
  • Regional / national hazmat teams
  • International hazmat teams
Response to the Natech Event
Barriers have been developed to prevent hydrocarbons from spreading further down the river into Peru.

The government had set up containment barriers to avoid “major impacts.”

Consequences

Off-site People At Risk
27000
Human Health Impacts
• 27,000 indigenous people had no access to clean water and food (Indigenous villages could not drink the water from the river anymore).
• Chemical burns on the skin due to direct contact with the oil during the initial days of the spill.
• Local communities are facing health concerns due to the use of the river water (for bathing, drinking, and eating) shortly after the oil spill.
• The substances found in the samples that exceed the norm are very toxic for the environment and for the health of populations.
•The presence of heavy metals are a high risk to human health as they accumulate in living beings and become part of food chains, and they can produce skin, respiratory, cardiac, digestive and nervous lesions.
•The oil spill has affected the food sovereignty of the population of the communities due to the contamination of the river water, soil, air, crops, domestic and wild animals.
Environmental Zones Impacted
  • Inland (e.g. grassland, cropland, forest)
  • Freshwater (e.g. pond, lake, stream)
Environmental Impacts
•Several kilometers of Amazonic rivers have been polluted.
•The oil spills were characterised by environmental groups as the worst environmental catastrophe Ecuador has seen in more than a decade.
•The land around the Coca River has become increasingly unstable due to an accelerated rate of soil erosion, raising concerns about the integrity of nearby infrastructure, including a hydropower dam.
•The recurring oil spills in 2009, 2013 and 2020 — the worst of the three — have tarnished the quality of the water.
•Based on samples from six spots along the affected rivers, pollutants were present in all stages of the water cycle, even rainwater. Some of the oil spilled into the river evaporated and is re-entering the land through rainwater, furthering the cycle of contamination. Signs of rainwater pollution is visible due to changes in its appearance (e.g., Report of Alliance for Human Rights Ecuador, Sept. 2020).
•The presence of hydrocarbons contaminants has led to the loss of fertility of the soil, low crop yields, and possible harmful consequences for living beings, humans and the entire ecosystem.
•There are concerns that if containment operations fail, the oil could reach the Amazon river in Peru (the Natech accident took place 300 km from the Ecuador-Peru border; the Ecuadorian Amazon promptly alerted the Peruvian authorities of the possible contamination of the Peruvian territory).
On-site Material Losses
424 – 636 M USD
Economic Impacts
Oil production and transport have been halted. The stop will last for at least 2/3 weeks.

- Ecuador halted operations of its two crude oil pipelines due to the landslide on 07/04/2020;
- Inventories were used to ensure oil exports and domestic fuel production continue;
- It was estimated that repairs to the two state-owned pipelines (SOTE, Poliducto Shishufindi-Quito) could take 2-3 weeks;
- Construction of a temporary pipeline in the affected area to keep the crude flowing.

Ecuador was forced to suspend oil exports for at least 2/3 weeks. This translates into state economic losses at least 424 - 636 million USD (i.e., average SOTE oil extraction: 531,251 barrels/day, price of export per barrel: 89 USD, monthly losses due to suspended operations: 424 - 636 million USD for 2-3 weeks of suspended activities) .
Community Disruption
The tarnished water quality, due to the recurring oil spills (2009, 2013 and 2020), has complicated the Indigenous communities that depend on the river water for food, water and employment (e.g., fishing).

The communities search for justice and reparation from the Ecuadoran state for the oil spills in April 2020. The lawsuit (filed in late April 2020), accuses the two oil companies, SOTE and OCP, along with the environment and energy ministries, of infringing their constitutional rights to clean water, health, food, and nature, as well as the rights of Indigenous people.

The lack of support from national and local authorities has left communities with few options, i.e.,
-communities have turned to using rainwater, but this becomes scarce during the dry season;
-some people have returned to the river to bathe, drink, and wash their clothes;
-new fishing spots are sought deeper in the Napo and adjacent rivers, where Indigenous peoples believe the water is cleaner than in the murky Coca;
-families without transport resort to growing local crops;
-rural communities have been unable to get supplies from cities due the concurrent COVID-19 pandemic and the lockdowns imposed by the government.

Remedial Activities

Decontamination Activities
Oil clean-up:

• The cleaning process started after the rupture of the pipelines/oil spills and it entered its ending phase one week later, on 14 April 2020.

• The effectiveness of the clean-up efforts were inspected 5 months after the accident in six communities on the banks of the Napo and Coca rivers in Sucumbíos and Orellana provinces. It was concluded there were levels of hydrocarbons alongside heavy metals like lead, nickel and vanadium from the samples examined.
Remediation Activities
• humanitarian aid to communities downstream (by the pipeline operators OCP Ecuador and Petroecuador);
• works towards halting the oil before it reaches the Amazon (by the pipeline operators OCP Ecuador and Petroecuador);
• remediate environmental damage (emergency teams);
Restoration Activities
• rebuild an almost 2km section of piping (emergency teams);
• construction of a temporary pipeline in the affected area (government) to keep the crude flowing and reconnect Ecuador’s economy to the world (emergency teams);

Lessons Learned

Lessons Learned on Equipment
As opposed to Ecuadoran government and several geologists, experts argued that one of the possible triggering mechanisms for the regressive erosion of the riverbed, associated with that the Natech accident, was the construction of the Coca Codo Sinclair Dam 20 kilometers upstream from the San Rafael Waterfall.

Thus, it can be concluded that careful consideration should be taken for:

1. The design and construction of hydroelectric plants in unstable terrains, considering the joint collaboration among engineers, geologists, hydrologists;

2. The retention of sediments from hydroelectric plants and its potential impact to the soil erosion in the surrounding area.
Lessons Learned on Human Health Aspects
1. Raising public awareness on how to respond during and in the aftermath of a Natech accident
Lessons Learned on Organisational Aspects
1. The protection of the environment and human rights should be enforced by the law.

2. Preventive measures should be put in place by government and oil companies once evidence is provided for an imminent disaster (e.g.,
evidence shows that the government and oil companies were well-advised that increased soil erosion along the riverbanks could cause a pipeline rupture).

3. Early warning and alert systems to become available to the affected communities.
Lessons Learned on Mitigation Measures
The majority of the clean-up process ended just one week after the rupture of the pipelines/oil spills, on 14 April 2020, but inspections after 5 months revealed high levels of hydrocarbons alongside heavy metals like lead, nickel and vanadium (from the samples examined).
Based on this fact, it is recommended that longer periods for the cleaning process should be required, depending on the amount and extent of oil spills.
Lessons Learned on Emergency Response Aspects
1. Alert systems should be put in place to warn downriver communities about contamination from the spill.
2. Downriver communities should be consulted on the companies’ remediation plan.
3. The public should be informed about the completion of the de-contamination activities for the safe use of the environmental resources.
ID: 78, Created: Amos NECCI, 2020-04-23 16:57:11 – Last Updated: Kyriaki GKOKTSI, 2023-03-17 10:34:38

Attachments

NoDescriptionFile Size
1.Amazon frontlines - Oil Spill Lawsuit Appeal794.83KB
2.Article in Mongabay 11/8/20201.54MB
3.Article in Mongabay news 29/04/2021 - one year after Ecuador oil spill6.00MB
4.Blog-post in Amazon Watch, 09/04/20202.13MB
5.Blog-post in LatinaRepublic, 10 August 20103.17MB
6.Blog-post in pgjonline, April 20204.83MB
7.Blog-post in Southern Affairs, 15 April 2020142.80KB
8.La Republica - Peru, 12 April 2020198.97KB
9.Report of the Inspection carried out to the communities affected by the oil and fuel spill of April 7, 20209.80MB