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<br /> <br />Table 5 <br /> <br />" <br /> <br />Colorado Basic Stream Standards For Metals <br /> <br />N <br />~ <br />...., <br />~ <br /> <br />------------------------------------------------------------------------------- <br /> <br />------- Class 1 Aquatic Life --~---- <br /> <br />Agr. ~ Domestic Water <br />Supply Class <br />1 & 2 <br /> <br />METALS II Water Hardness or Alkalinity (mg/l) <br />(ug/l) 0-100 100-200 200-300 300-400 400+ <br />Al(sol) 100 100 100 100 100 <br />As 50 50 50 50 50 100 50 <br />Be 10 300 600 900 1100 100 <br />Cd 0.4 1 5 10 15 10 10 <br />Cr III 100 100 100 100 100 100 50 <br />Cr VI 25 25 25 25 25 100 50 <br />Cu 5 10 10 20 40 200 1000 <br />Fe 1000 1000 1000 1000 1000 300 (sol) <br />Pb 4 25 50 100 150 100 50 <br />Mn 1000 1000 1000 1000 1000 200 50 (sol) <br />Hg 0.05 0.05 0.05 0.05 0.05 2 <br />Ni 50 100 200 300 400 200 <br />Se 50 50 50 .50 50 20 10 <br />Ag 0.10 0.10 0.15 0.20 0.25 50 <br />Zn 50 50 100 300 600 2000 5000 <br /> Explanation <br />'" - Note: All values other than alkalinity are expressed in ug/l. <br />sol - Soluble or dissolved form of D1etal. <br />Agr. - Use for stock watering or irrigstion <br />pH range - 6.5 to 9.0 for Aquatic Life and Class 1 (Primary Contact) . <br /> Recreational uses. <br /> 5.0 to 9.0 for Domestic Water Supply. <br />Taken from Table III, Basic Standards and Methodologies, 3.1.0 (5 CCR 1002-8) <br />Colorado Department of Health, 1984. <br /> <br /> <br />-36- <br /> <br /> <br />" <br />l' <br />~. <br /> <br />,,!:~. <br />;"~ <br />9) <br /> <br />?~: <br />&. <br /> <br />~~ <br />f-'. <br />~!J, <br /><< <br /> <br />:p <br /> <br />'t4 <br /> <br />~~i~ <br />~'.>',. <br />,"t. <br />;":" <br />~.:, <br /> <br />,~ <br />i$ <br />. r~!;.' <br /> <br />