ExxonMobil update for oil spill – April 18th

MAYFLOWER, AR – The Mayflower Incident Unified Command Joint Information Center
provided the following update as cleanup operations continued Thursday, April 18, following a
release of crude oil near Mayflower, AR.
• A new section of the Pegasus pipeline was installed on the 16th. The damaged portion was
removed Monday and transported to an independent third-party laboratory for metallurgy
testing. The removal of the damaged section was conducted in the presence of officials from
the Pipeline and Hazardous Materials Safety Administration (PHMSA), the Arkansas
Attorney General’s office and local authorities. PHMSA must approve plans to repair, test
and restart the line before it can return to service.
• For 17 consecutive days, data from the air monitors in the Mayflower community have
shown levels that are either non-detect or below action levels established by the Arkansas
Department of Health.
• The U.S. Environmental Protection Agency is responsible for ongoing air quality monitoring.
Air monitoring is conducted on a continuous basis and data are reviewed by the Arkansas
Department of Health. Air data are posted on the Arkansas Department of Environmental
Quality’s website and updated as it becomes available. Final home re-entry
recommendations based on air quality are given by the Arkansas Department of Health.
• The Unified Command has endorsed an air sampling plan for the 21 impacted homes in the
Northwoods subdivision. Air sampling will be done with residents’ permission and in
conjunction with the air monitoring that is part of the re-entry plan.
• At least 40 private residences and public buildings have had indoor air quality monitoring
conducted at the requests of the public and all have been cleared by the Arkansas
Department of Health and the U.S. Environmental Protection Agency. As work progresses,
there have been reports of an odor at times in some areas that may cause concern.
However, air quality monitoring has shown non-detect readings. Any resident concerned
about air quality should call the claims hotline (1-800-876-9291) to request monitoring. Air
data are posted on the Arkansas Department of Environmental Quality’s website and
updated as it becomes available.
• Cleanup is almost complete in the affected section between North Main Road and the
interstate highway (I-40). Following cleanup, the process of remediation will begin. This will
involve restoration of the site to its previous state.
• Water sampling confirms the main body of Lake Conway remains oil-free. The Arkansas
Department of Environmental Quality and ExxonMobil are continuing to monitor water
samples. Further assessments also show there is no oil in Palarm Creek, which is located
south of Lake Conway. Water data are posted on the Arkansas Department of
Environmental Quality’s website and updated as it becomes available.

Cleanup continues in the Northwoods subdivision and the marsh area between the
interstate highway and the cove adjacent to Lake Conway. Work in the neighborhood
continues and includes replacing a portion of the storm drain system. In the marsh, the
remaining oil continues to be contained and is being cleaned up by work crews using a
combination of pumps, backhoes and oleophilic and hydrophobic pads, made from specially
designed materials that absorb oil but not water.
• Efforts to return residents to their homes in the Northwoods subdivision continue. Further
work, such as replacing a portion of the storm drain system, is being done in the
neighborhood to return residents to their homes as quickly as possible. While the Arkansas
Department of Health has indicated there should be no impact on the health of Northwoods
neighborhood residents, some residents may not decide to return until all work involving
heavy equipment within the neighborhood has been completed.
• ExxonMobil is paying for the cleanup and will honor all valid claims. ExxonMobil has
developed a plan to address concerns about the long-term value of homes in the
Northwoods neighborhood up to and including home purchases. The company is in the
process of communicating the plan to them. Residents can call a claims hotline (1-800-876-
9291) for more information. As of today, 246 claims have been made.
• U.S. Environmental Services and Wildlife Response Services, ExxonMobil contractors, are
caring for recovered animals. Eighty-six animals have been captured, cleaned, and
released. Fish in Lake Conway have not been affected. U.S. Fish and Wildlife and the
Arkansas Game and Fish Commission are actively involved in the response effort to ensure
wildlife is properly captured and treated. Appreciation is extended to the Hawk Center, which
initially cared for wildlife during the emergency response. Residents who find injured or oiled
wildlife should call the claims hotline (1-800-876-9291) and not approach wildlife for their
safety and the safety and welfare of the wildlife.
• The Unified Command estimates approximately 5,000 barrels of oil were spilled on March
29. A final estimated release volume will be provided once the line has been repaired and
refilled.
• There has been no impact on Mayflower’s drinking water supply. Community Water System
manages Mayflower’s water supply, which is sourced from Greer’s Ferry Lake, located
about 65 miles northeast of Mayflower.
• Local emergency responders from the city and county have made a tremendous contribution
to the cleanup operation. The efficiency of the effort would not be possible without all the
contributions of these professionals. Emergency response personnel were on the ground
within 30 minutes after the leak was detected.
• The cause of the spill is under investigation.