General Information

Government Type

State Agency

Entity

Department of Environmental Quality

Public Body

Division of Water Quality

Notice Information

Add Notice to Calendar

Notice Title

Notice of Limited Extension of Comment Period Waterleaf Phase I, LLC Level II Antidegradation Review

Notice Type(s)

Notice

Event Start Date & Time

September 23, 2026 05:00 PM

Event End Date & Time

October 8, 2026 05:00 PM

Description/Agenda

September 23, 2026 Notice of Limited Extension of Comment Period Waterleaf Phase I, LLC Level II Antidegradation Review Purpose of Public Notice On July 28, 2026, the Director of the Utah Division of Water Quality issued a public notice providing a 30-day review period of the Level II Antidegradation Review (ADR) required for Waterleaf Phase 1, LLC's Great Salt Lake Phase 1 Lithium Extraction Project (First Public Comment Period). After considering the comments received during the First Public Comment Period, the Director requested modifications to the Level II ADR to address concerns raised. Specifically, information on the manganese treatment system (Section 2.3.1), the parameters of concern (Section 5 and Section 10), and the alternatives analysis (Section 6) were updated. In addition, the requirements for chlorine monitoring (Section 5.2) were clarified. The update also includes other minor corrections and process clarifications. The public comment period is being extended for the narrow purpose of making the updated information available for public comment. The Director solicits comments only on the updated information identified in this Notice. To help identify the updated information in the ADR report, both a redlined version capturing the revisions, and a final version, are attached to this Notice. Concerning the previously noticed Level II ADR, the Director will only consider comments submitted on or before August 27, 2026, and will summarily disregard comments that are duplicative, late, or out of scope. Permit Information PERMITTEE NAME: Waterleaf Phase 1, LLC FACILITY NAME: Great Salt Lake Phase 1 Lithium Extraction Project FACILITY LOCATION: Western Slope Promontory Mountains Unincorporated Box Elder Co. MAILING ADDRESS: 9350 South 150 East, Suite 710 Sandy, Utah 84070 TELEPHONE NUMBER: (248) 497-2883 UPDES PERMIT NO.: UT0026352 DISCHARGE LOCATION: Latitude 41° 26' 44.47', Longitude 112° 42' 25.25' RECEIVING WATER: Gunnison Bay, Great Salt Lake Public Comments Public comments are invited at any time prior to 5:00 pm on October 8, 2026. Written comments may be submitted to: Nicholas Von Stackelberg, Utah Division of Water Quality, PO Box 144870, Salt Lake City, Utah 84114-4870 or by email at: nvonstackelberg@utah.gov. The Director will consider all comments in making a final decision. Commenters have an affirmative obligation to raise all reasonably ascertainable issues and submit all reasonably available arguments and factual grounds supporting their position, including all supporting material. Supporting material must be included in full and may not be incorporated by reference, unless the material is already part of the administrative record. Under Utah Code § 19-1-301.5, a person who wishes to challenge a Permit Order may only raise an issue or argument during an adjudicatory proceeding that was raised during the public comment period and was supported with sufficient information or documentation to enable the Director to fully consider the substance and significance of the issue. The permit is available for public review under 'Public Participation' at https://deq.utah.gov/general/public-notices and on the Utah Public Notice Website. If internet access is not available, a copy may be obtained by calling Nicholas Von Stackelberg at (801) 536-4374, or in person at 195 N. 1950 W., Salt Lake City, Utah 84116. Further Information In compliance with the Americans with Disabilities Act, individuals with special needs (including auxiliary communicative aids and services) should contact Maria Anderson, Office of Human Resources at (801) 503-5618, TDD (801) 503-5618.

Notice of Special Accommodations (ADA)

In compliance with the Americans with Disabilities Act, individuals needing special accommodations (including auxiliary communicative aids and services) during this meeting should notify Emily Canton at 801-536-4342.

Notice of Electronic or Telephone Participation

NA

Meeting Information

Meeting Location

195 N. 1950 W.
Salt Lake City, UT 84116
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Contact Name

Emily Canton

Contact Email

ercanton@utah.gov

Contact Phone

(801)536-4342

Notice Posting Details

Notice Posted On

September 23, 2026 05:20 PM

Notice Last Edited On

September 23, 2026 05:20 PM

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