SUPPLEMENTARY INFORMATION:

As required by 40 CFR part 148, Rubicon LLC adequately demonstrated to the EPA by the petition issuance application and supporting documentation that, to a reasonable degree of certainty, there will be no migration of hazardous constituents from the injection zone for as long as the waste remains hazardous. This final decision allows the underground injection by the Geismar Louisiana Facility, of the specific restricted hazardous wastes identified in this exemption issuance, into Class I hazardous waste injection Well WDW-6 until December 31, 2040, unless EPA terminates this exemption under provisions of 40 CFR 148.24. Additional conditions included in this final decision may be reviewed by contacting the Region 6 Ground Water/UIC Section. As required by 40 CFR 148.22(b) and 124.10, a public notice comment period started on April 6, 2023, and closed on May 22, 2023. No comments were received. EPA made significant edits to the fact sheet after the public comment period including naming the petition an issuance instead of a reissuance and clarifying portions of the geology section. A second comment period was started on September 7th, 2023, and closed on October 23rd, 2023. No comments were received. This decision constitutes final Agency action, and there is no Administrative appeal.