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Federal Register / Vol. 86, No. 107 / Monday, June 7, 2021 / Proposed Rules
the comment includes information claimed to be Confidential Business Information CBI or other information whose disclosure is restricted by statute.
Do not submit information that you consider to be CBI or otherwise protected through www.regulations.gov or email. The www.regulations.gov website is an anonymous access system, which means the EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an email comment directly to the EPA
without going through www.regulations.gov your email address will be automatically captured and included as part of the comment that is placed in the public docket and made available on the internet. If you submit an electronic comment, the EPA
recommends that you include your name and other contact information in the body of your comment and with any physical media you submit. If the EPA
cannot read your comment due to technical difficulties and cannot contact you for clarification, the EPA may not be able to consider your comment.
Electronic files should avoid the use of special characters, any form of encryption, and be free of any defects or viruses.
Any person may request an informal hearing on this proposed decision by filing a request with Timothy Hamlin, Director, Land, Chemicals and Redevelopment Division, EPA, Region 10, 1200 6th Ave., Suite 155, M/S 15
H04, Seattle, Washington 98101. The request must contain the information prescribed in 40 Code of Federal Regulations CFR 260.20d.
Docket: All documents in the docket are listed in the www.regulations.gov index. Although listed in the index, some information may not be publicly available, e.g., CBI or other information whose disclosure is restricted by statute.
Certain other material, such as copyrighted material, will be publicly available only in hard copy form.
Publicly available docket materials are available electronically through www.regulations.gov. Due to restrictions related to COVID19, docket materials are not available in hard copy form at this time. If you have further questions concerning docket materials, we recommend you telephone Dr. David Bartus at 206 5532804.
FOR FURTHER INFORMATION CONTACT: Dr.
David Bartus, EPA, Region 10, 1200 6th Avenue, Suite 155, M/S 15H04, Seattle, Washington 98101; telephone number: 206 5532804; fax number 206 5538509; email address:
bartus.dave@epa.gov.

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As discussed in Section V of this document, the Washington State Department of Ecology is evaluating the Petitioners request for this modification under state authority. Information on Ecologys action may be found at https ecology.wa.gov/Waste-Toxics/
Nuclear-waste/Public-comment-periods.
The information in this section is organized as follows:

SUPPLEMENTARY INFORMATION:

I. Overview Information II. Background A. Hanfords 200 Area Effluent Treatment Facility B. Hanfords Waste Treatment and Immobilization Plant C. Changes to 200 Area Effluent Treatment Facility Capability III. The EPAs Evaluation of the Proposed Technical Amendments A. Addition of Steam Stripping as a New Unit Operation B. Changes to Treatability Envelope Demonstration Test Requirements C. Miscellaneous Changes and Updates IV. When Would the EPA Finalize the Proposed Delisting Modification?
V. How Will This Action Affect States?
VI. Statutory and Executive Order Reviews
I. Overview Information The EPA is proposing technical amendments to an existing exclusion from the list of federally-listed wastes set forth in 40 Code of Federal Regulations CFR 261.33 previously issued to the United States Department of Energy Energy for the Hanford Federal Facility, or Hanford Site in Richland, Washington. See 40 CFR part 261, appendix IX, Table 2. This existing exclusion applies to treated effluent generated by Hanfords 200 Area Effluent Treatment Facility ETF. As described below, these amendments relate to the planned startup of the Hanford Waste Treatment and Immobilization Plant.
Based on our review described in Section III of this document, we propose to approve the requested amendments.
II. Background A. Hanfords 200 Area Effluent Treatment Facility The 200 Area ETF is a radioactive aqueous wastewater treatment system located in the 200 East Area of the Hanford Site that provides treatment for a variety of aqueous mixed waste. This aqueous waste includes process condensate from the 242A Evaporator, Hanford landfill leachates, and other aqueous waste generated from onsite remediation and waste management activities, potentially carrying a range of listed and characteristic dangerous
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waste numbers.1 The 200 Area ETF
consists of a primary and a secondary treatment train. The primary train includes treatment processes to treat both organic and inorganic waste constituents, including ultraviolet oxidation UV/OX, reverse osmosis, ion exchange, pH adjustment and filtration.
The secondary treatment train manages backwash from the primary treatment train filters, ion exchange regeneration, and the stream from the reverse osmosis system that is retained by the reverse osmosis membrane, also known as retentate. Construction of the 200 Area ETF began in 1992 with waste management operations beginning in November of 1995.
Treated effluent from the 200 Area ETF is discharged to the State Approved Land Disposal Site, or SALDS, located north of the 200 West Area of the Hanford Site. This disposal unit allows tritium remaining in the treated effluent to naturally decay in the subsurfaceit is not authorized to accept dangerous waste. To this end, the EPA issued an exclusion from the list of hazardous wastes to Energy in 1995. See 60 FR
6054, February 1, 1995. This exclusion was amended by the EPA in 2005. See 70 FR 44496, August 3, 2005.
B. Hanfords Waste Treatment and Immobilization Plant The Waste Treatment and Immobilization Plant WTP is intended to process and stabilize much of the 56
million gallons of radioactive and chemical waste currently stored at the Hanford Site. As originally envisioned, the WTP would treat high-level and low-activity radioactive waste simultaneously. To begin treating waste as soon as practicable, Energy developed an approach to treat lowactivity waste prior to the start-up of the WTP pre-treatment and the high-level waste facilities. This approach is called direct-feed low-activity waste, or DFLAW, and is focused on sending lowactivity waste from the tank farms directly to the WTP Low-Activity Waste LAW Facility. A new Effluent Management Facility EMF has been constructed at the WTP to manage effluents generated from the WTP LAW
Facility during DFLAW. The EMF is needed to evaporate the liquid secondary waste generated by the off-gas 1 The Washington State Department of Ecology is authorized to implement their dangerous waste regulations at Washington Administrative Code WAC 173303 in lieu of the federal hazardous waste system, except for certain requirements, such as the state counterparts to the federal delisting regulations at 40 CFR 260.20 and 22. Under the dangerous waste program, dangerous wastes are a superset of federal hazardous wastes.

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