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1985 X SOUTH BROADWAY <br />(` GRAND JUNCTION, CO 81507-9649 <br />DAUB & ASSOCIATES, INC. r TFU_ (970)254-1224 <br />f t FAX (970) 242-8438 <br />1 J ! ,` - Email; gidaub@daubandassociates.com <br />www.daubandassociates.com <br />July 31, 2024 <br />Transmitted Electronically <br />On 07/31/2024 <br />Mr. Nathan Wiser <br />Ground Water Specialist <br />USEPA — Region 8 <br />1595 Wynkoop Street (mail code: 8ENF-W-SDW) <br />Denver, CO 80202-1129 <br />Re: Natural Soda LLC 2024 2nd Quarter Report (Sent via e-mail). <br />Dear Mr. Wiser: <br />The following information is submitted for the 2024 second quarter report on behalf of <br />Natural Soda LLC (NS), as required in Part II.D.9 of UIC Permit C030358-00000. <br />Please note the Confidentiality of certain sections of this report. <br />The following 2024 first quarter information is submitted in compliance with UIC <br />Permit: <br />Section A: <br />Non -Confidential Data <br />Page(s) <br />EPA Injection Well Monitoring Report (Form 7520-8) Pressure & Flow <br />04-13 <br />Injection Pressure & Flow Weekly Tables and Graphs <br />14-17 <br />Recovery Flow Weekly Tables and Graphs <br />18-23 <br />Section B: <br />CONFIDENTIAL DATA <br />Page(s) <br />EPA Injection Well Monitoring Report (Form 7520-8) (TEMP CONFIDENTIAL) <br />25-34 <br />Injection Temperature Weekly Tables and Graphs (CONFIDENTIAL) <br />35-39 <br />Total Bicarb and Temperature, 2023-2024 Graphs (CONFIDENTIAL) <br />40-42 <br />Cavity Allocations (Monthly Tables) (CONFIDENTIAL) <br />43-48 <br />Section C: <br />GROUNDWATER MONITORING WELLS (GMW) <br />Page(s) <br />GMW AC2 Data Sheets <br />50-77 <br />GMW Water Quality Data Tables <br />78-87 <br />SPECIALIZING IN PROFESSIONAL GEOLOGICAL, ENVIRONMENTAL, HYDROLOGICAL, GEOTECHNICAL AND PERMITTING SERVICES <br />