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TVS=table value standards <br /> Footnotes: <br /> La Plata River flow taken from Hesperus Gage(LAPHESCO). <br /> (1)SDWA NPDWR MCL=Safe Drinking Water Act National Primary Drinking Water Regulations Maximum Contaminant Level. These are legally <br /> enforceable standards that apply to public drinking water systems. Primary standards protect public health by limiting the levels of contaminants <br /> in drinking water. <br /> (2)SDWA NSDWR SMCL=Safe Drinking Water Act National Secondary Drinking water Regulations Secondary Maximum Contaminant Level. <br /> These are non-enforceable guidelines regulating contaminants that may cause cosmetic effects(such as skin or tooth discoloration)or aesthetic <br /> effects(such as taste,odor,or color)in drinking water. EPA recommends secondary standards to water systems but does not require systems to <br /> (3)Treatments Technique(TT). A required process intended to reduce the level of a contaminants in drinking water. Lead and copper are <br /> regulated by a Treatment Technique that requires a system to control the corrosiveness of their water. If more than 10%of tap water samples <br /> exceed the Action Level,water systems must take additional steps to treat the water. <br /> (4)1002-31-Regulation 31-Colorado Water Quality Control Division,Tables III and IV. <br /> SGM <br /> 0 812 0/2 01 8 P:\Project Filest2017-460.001 Sunrise Mining-May Day Mine1M-Water Qualityt2018=\ <br /> Tbls.1-10-W-May Day Idaho Mine Complex WQ-Results-2018.xIsxSW-2 <br />