NS 2023 Annual Report For EPA

• IBM Index Class Name: Hydrology
• Doc Date: 8/28/2025
• Archive: No

Natural Soda LLC 2023 Project Status Report & Annual Plan of Development
11 January 2024

Colorado Department of Public Health & Environment (CDPHE)
• CDPHE inspection personnel conducted a full compliance inspection of NS
operations on February 7, 2023. No visible emissions were observed during
inspection, no off property transport of visible emissions were observed, and no
odors were noted. Construction Permits were reviewed with no noted concerns.
Current Air Permit Emission Notices (APENs) were reviewed and found to be in
compliance. The CDPHE inspection found NS to be in compliance.
• On February 22, 2023, NS submitted the COG-500000 Annual Stormwater
Report to the CDPHE.
• NS submitted annual water sampling data for water supply wells (WSWs) to the
CDPHE in the 4th quarter 2023. The WSW-2 tested positive for coliform. This
issue was corrected by NS with the addition of 55 gallons of sodium
hypochlorite and 4,400 gallons of 1% sodium hypochlorite to WSW-2 over the
course of a day, the well was allowed to sit overnight. The following day the
well pump was started, the treated water was pumped into the NS water truck,
and periodically tested until uS, pH, ORP, free chlorine and total sulfide returned
to normal ranges. NS continued flushing the well for an additional day and
submitted another sample to CDPHE which tested negative for coliform and e
coli. Treatment was completed on December 5th, and the treated fluid was
disposed of properly into the NS waste pond.
• NS submitted a Facility-Wide Greenhouse Gas Emissions (GHG) APEN (AIRS
ID # 103/0028/002) and fee on December 20, 2023.

Rio Blanco County (RBC)
• RBC did not require amendments to the existing Special Use Permit (SUP)
12-04 for the 2023 P&A operations.
• A RBC building permit for the 2023 Train 2 Cyclone Installation Project was
acquired by NS in September 2022.
• In June, NS submitted and was approved for a SUP permitting the construction
of the 18H-1V well pad, pipeline, and access road.