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Newmont«, CRIPPLE CREEK & VICTOR <br /> PO Box 191 <br /> CRIPPLE CREEK&VICTOR 100N.3rdStreet <br /> Victor CO 80860 <br /> Table 3.6 Grassy Valley Surface Water Standards (COARUA24) <br /> 24.Mainstem of East and West Beaver Creeks,including all Inbularies and wetlands,from the source to the confluence with Beaver Creek:mainstem of Beaver Creek from the <br /> source to the point of diversion to Brush Hollow Reservoir. <br /> COARUA24 Classifications Physical and Biological Metals(ug/L) <br /> Designation Agriculture DM MWAT acute chronic <br /> Reviewable Aq Life Cold 1 Temperature°C CS 1 CS-II Arsenic 340 — <br /> Recreation E acute chronic Arsenic(T) — 0.02 <br /> Water Supply D.O.(mg/L) — 6.0 Cadmium TVS TVS <br /> Qualifiers: D.O.(spawning) — 7.0 Cadmium(T) 5.0 — <br /> Other: pH 6.5-9.0 — Clromiun Ill — TVS <br /> Temporary Modlfication(s): chlorophyll a(mg/mv) — 150 Chromium III(f) 50 — <br /> Arsenic(chronic)=hybrid E.cob(per 100 mL) — 126 Chromium VI TVS TVS <br /> Expiration Date of 12/312024 Copper TVS TVS <br /> 'Uranium(acute)=See 32.5(3)for details. Inorganic(mgll) ton — WS <br /> "Uranium(chronic)=See 32.5(3)for details. acute chronic kon(T) — 1000 <br /> Ammonia TVS TVS Lead TVS TVS <br /> Boron — 0.75 Lead(T) 50 — <br /> Chloride — 250 Maydtfese TVS TVSNVS <br /> Chlorine 0.019 0.011 Mercury(T) — 0.01 <br /> Cyanide 0.005 — Mdybdenum(T) — 150 <br /> Nitrate 10 — Nickel TVS TVS <br /> Nitrite — 0.05 hlcket(T) — 100 <br /> Phosphorus — 0.11 Selenium TVS TVS <br /> Sulfate — WS SVver TVS TVS(tr) <br /> III Sulfide — 0.002 Uranium varies* varies' <br /> Zmc TVS TVS <br /> III <br /> Department THIS DOCUMENT IS UNCONTROLLED IN HARD COPY FORMAT Doc Id: <br /> SER Date of This Issue--/--/-- Date of Next Review:--/--/-- Page 15 of 73 <br />