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Hydrologic Monitoring Plan <br />Northfield Mine <br />Revised 12/19/2007 <br />TABLE 4 <br />Domestic Water Supply <br />Human Health, Domestic and Agricultural Standards <br />Suggested Water Quality Parameters <br />Reference:CDPHE WQCD 100214 Basic Standards <br />These standards apply only to compliance point CCA1. <br /> <br /> <br />Parameter Standard <br />Total Coliform <1 org/100mL <br />Aluminum AI 5 mg/L <br />Antimon SB 0.006 mg/L <br />Asbestos 7 million <br />fibers/Liter <br />Arsenic AS 0.05 mg/L <br />Barium Ba 2.o mg/L <br />Ber Ilium Be 0.004 mg/L <br />Boron B 0.75 mg/L <br />Cadmium Cd 0.005 mg/L <br />Chromium Cr 0.1 mg/L <br />Cobalt CO 0.05 mg/L <br />Co er Cu 0.2mg/L <br />C anide Free CN 0.2 mg/L <br />Fluoride F 2 mg/L <br />Iron Fe 0.3 mg/L <br />Lead Pb 0.05 mg/L <br />LIthIUm LI 2.5 mg/L <br />Man anese Mn 0.05 mg/L <br />Mercur H 0.002 mg/L <br />Nickel Ni 0.1 mg/L <br />Nitrite 1.0 mg/L <br />12 <br />Nitrate 10 mg/L <br />Total Nitrate + Nitrite 10 mg/L <br />Selenium Se o.02 mg/L <br />Silver A 0.05 mg/L <br />Thallium TI o.002 mg/L <br />Vanadium V o.l mg/L <br />Gross Alpha Particle <br />Activit 15 pCi/L <br />Beta and Photon <br />Emitters 4 mrem/year <br />Chloro henol 0.0002 mg/L <br />Chloride CI 250 mg/L <br />COIOr 15 color units <br />Co er Cu i mg/L <br />COrrOSIVIt Noncorrosive <br />Foamin A eats 0.5 mg/L <br />Odor 3 threshold <br />odor numbers <br />H 6.5-8.5 <br />Phenol 0.3 mg.L <br />Sulfate z5o mg.L <br />Zinc Zn 2 mg/L <br />Total Dissolve Solids 400 mg/L or <br />1.25 times <br />