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µg/L=microgram per Liter <br /> NA=not applicable <br /> ND=not detected <br /> 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 in <br /> drinking water. <br /> (2)SDWA NSDWR SMCL=Safe Drinking Water Act National Secondary Drinking water Regulations Secondary Maximum Contaminant Level. These <br /> are non-enforceable guidelines regulating contaminants that may cause cosmetic effects(such as skin or tooth discoloration)or aesthetic effects(such <br /> as taste,odor,or color)in drinking water. EPA recommends secondary standards to water systems but does not require systems to comply. <br /> (3)Treatments Technique(TT). A required process intended to reduce the level of a contaminants in drinking water. Lead and copper are regulated <br /> by a Treatment Technique that requires a system to control the corrosiveness of their water. If more than 10%of tap water samples exceed the Action <br /> 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 /> 01/15/2018 P:\Project Files\2017-460.001 Sunnse Mining-May Day Mine\M-Water Quality\ <br /> Tbls.1-10-May Day Idaho Mine Complex WQ-Results-2017.xlsxSW-1 <br />