2023-06-06_PERMIT FILE - M2023015

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Note that,for example,the creek flow at SMC003 was 890 ppb zinc in October 2016, compared to 180 ppb this past October 2022. The demonstrated efficacy of MineWater's work for the past 7 years is evidence of the effectiveness of the Compliance Order on Consent/Settlement Agreement,the full implementation of which is functionally the Environmental Protection Plan for the Site. (a) This segment of South Mosquito Creek is numbered as 2c, in Regulation #38 Stream Classifications and Stream Standards of the CDPHE Adopted Rules. Uses of the water in South Mosquito Creek, are defined as Agriculture, Aquatic Life Cold 1, and Recreation E. See the following table from Regulation#38. REGULATION#38 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS Upper South Platte River Basin 2c South Mosquito Creek from the source to confluence with Mosquito Creek Mosquito Creek from the confluence with South Mosquito Creek to Road 9698(39 270971 - 106 098846) and No Name Creek from the source to the confluence with South Mosquito Creek COSPUS02C Classifications Physical and Biological Metals(uglL) Designation Agnculture DM MWAT acute chronic UP Aq Life Cold 1 Tempus[ure-C C—S4 CS-1 Aril 340 — Recreahon E acute chronic Arsenic[T) -- 76 Qualifiers. D.O.(mglL) — 6.0 Cadmium Ns TVs Other DO (spawning) -- 70 Chromium III TVs TVs pH 6.5-9.0 — chromhan 111(n — 100 -Uraniumlacute)=See 38 5(3)for details chlorophyll a(mglm=) -- TVS Chromium VI TVs TVs 'Uranium(chronic1=See 38 5t3)for details E odi(Per 100l — 126 Copper TVs TVs Iron(T) — 1000 Inorganic(mglL) Lead TVs TVs acute chronic Manganese TVs TVs Ammords TVs TVs Me-ym — 001 Boron — 075 Molybdenum(T) -- 150 Chloride — 250 Nidull TVs TVs Chlorine 0 019 0 011 Selenium TVs TVs Cyanide 0.005 — sWar TVs TVs(tr) Nitrate 100 — Uranium vanes' vanes' Nitride — 0.05 zinc — 280 Phosphorus -- TVS suife - - Sulfide -- 0 002 This Use Classification for South Mosquito Creek was reviewed and adopted after a public hearing before the Water Quality Control Commission on June 8-9, 2020 after a presentation by MineWater LLC at the Hearing. Our then conceptual plan to conduct removal of minerals from the basin was presented to the Commission, and was well received.