Ethylene Oxide: Technical Reviews and Outreach to Potentially Affected Communities
Status Report - Third Quarter 2021 Update
July - September 2021

Sasol Corporation, Westlake, LA

As EPA pursues its mission to protect public health and the environment, addressing ethylene
oxide (EtO) remains a major priority for the Agency. EPA's National Air Toxics Assessment
(NATA), released in August 2018, identified a number of areas of the country where risks of
cancer were potentially elevated because of ethylene oxide emissions. NATA estimated these
risks based on EtO emissions from 2014, which were the most recently available at the time.

Because NATA is a screening-level analysis, additional work is needed to better understand
emissions in areas NATA identifies as potentially having elevated risk, and to identify
opportunities for early reductions at individual facilities, while EPA reviews its regulations for
industries. EPA is supporting its state air agency partners in that work.

In January 2021, EPA posted the first status report describing the technical analysis and
outreach work conducted for Sasol Chemicals (USA), Lake Charles Chemical Complex (Sasol
Chemicals) in Westlake, LA. Since then, updates have been posted for the first and second
quarters of 2021. This document summarizes additional work conducted in the third quarter of
2021.

Technical review updates:

• EPA has completed additional, more refined technical and risk assessments. The EtO technical
assessment report for Sasol can be found at the following website: https://www.epa.gov/caa~
permitting/site~specific~information~ethvlene~oxide~eto~sasol~chemicals~usa~lake~charles. The results
of an updated air toxics risk assessment for Sasol are available at this website:

https://www.epa.gov/svstem/files/documents/2021~07/region~6~risk~assessment~of~
ethylene~oxide~emitting~facilities-in~texas-and~louisian~iul~8~2021.pdf.

Outreach updates:

On September 30, 2021, EPA conducted a virtual EtO community outreach event for community
members who live near Sasol. During the virtual meeting, EPA staff and facility representatives
provided information and answered questions about ethylene oxide, how it is managed by the
facility and the associated potential risks in the communities near the facility. A video and
transcript of the event are under review and will be posted to the following website:
https://www.epa.gov/caa~permitting/site~specific~information~ethylene~oxide~eto~sasol~
chemicals-usa-lake-charles.

Written responses to questions from the meeting will be posted on the website above when
they become available.

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