2023-10-30_PERMIT FILE - M2023015 (2)

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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#698(39,270971,- 106.098846),and No Name Creek from the source to the confluence with South Mosquito Creek. COSPUS02C Classifications Physical and Biological Metals(rgfL) Designation Agriculture DM MWAT acute chronic UP Aq Life Cold 1 Temperature-C CS4 CS4 Atssde 340 — Recreation E acute chronic Arsenic(T) — 7.6 (qualifiers: D.O.(rng1L) — 6.0 Cadmium TVS TVs Otiar D.O (spawning) -- 7.0 Chromium III TVs TVs PH 6.5-9.0 — Chmmitsn 01(n — 100 'Uranium(acute)=See 38.5(3)for details. chlorophyll a(mg/rr") — TVs Chromium VI TVs TVs 'Urantum(chronic)=See 38.5(3)for details. E.ooh(per 100 nil-) — 128 Copper TVs TVs tron(T) — 1000 Inorganic(mgfl-) Lead TVs TVs acute chronic Manganese TVs TVs Ammonite TVs TV8 Mwaay(n — 0.01 Boron -- 0.75 Molybdenum(T) — 150 Chloride — 250 K W TVS TVs Chlorine 0.019 0.011 Selenium TVs TVs Cyanide 0.006 — swer TVs TVS(tr) Nitrate 100 — Uranium vanes' varies' Nome — 0.05 Zinc — 280 Phosphorus -- TVS SuNate — 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 I Hearing. Our then conceptual plan to conduct removal of minerals from the basin Commission,and was well received. (b) See the following five quarters of WQ sampling data. Cd, PD L RL < 0.5 RL < 0.5 Cu, PD tL RL < 2.0 RL < 2.0 Pb, PD l) RL < 0,5 RL < 0.5 PD L RL < 0.5 RL < 0.5 Zn, PD L 112 110 Hardness (CaCO3) 2M 250 Figure 6 January 2023 Sampling from Discharge and from downstream in Creek