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These abbreviations mean: For all surface waters with an actual water supply use,the less <br /> restrictive of the following two options shall apply as numerical standards, as specified in <br /> the Basic Standards and Methodologies at 31.16 Table II and III: <br /> (1) existing quality as of January 1, 2000; or <br /> (2) Iron = 300 µg/1 (dissolved) <br /> Manganese = 50 µg/1 (dissolved) <br /> SO4 = 250 mg/I <br /> For all surface waters with a"water supply"classification that are not in actual use as a <br /> water supply, no water supply standards are applied for iron, manganese or sulfate, unless <br /> the Commission determines as the result of a site-specific rulemaking hearing that such <br /> standards are appropriate. <br /> (3) Table Value Standards <br /> In certain instances in the attached tables,the designation "TVS" is used to indicate that <br /> for a particular parameter a "table value standard" has been adopted. This designation <br /> refers to numerical criteria set forth in the Basic Standards and Methodologies for <br /> Surface Water. The criteria for which the TVS are applicable are on the following table. <br /> TABLE VALUE STANDARDS <br /> (Concentrations in µg/l unless noted) <br /> PARAMETER"' TABLE VALUE STANDARDS(2)(3) <br /> Ammonia(4) Cold Water <br /> 0.275 39 .0 <br /> acute I + 10 7.204 —pH + I + 10 pH —7.204 <br /> 0.0577 2.487 )* (2.85, 1.45 10 <br /> 0.028(25—T)) <br /> chronic = I + 107.688—pH + MIN 1 + 10pH-7.688 <br /> * <br /> Warm Water <br /> 0.411 58 .4 <br /> acute = <br /> 1 + 10 7.204 —pH + l + 10 pH —7.204 <br /> chronic(Apr]—A ug3 1)=(1+10 0.0577 2.487 (2.85, 1.45*100.028(25—T)7.68&pH + 1+I OpH-7 688 *MIN <br /> 0.0577 2.487 0.028*(25—MAX(T,7)) <br /> chronic(Sep 1—Mar 31)=(1+10 7.688—pH + 1+10pH-7 688 "I.45+10 <br /> NH3 —old TVS Cold Water Acute=0.43/FT/FPH/2(4old)in mg/1 (N) <br /> Warm Water Acute=0.62/FT/FPH/2(4 old)in mg/(N) <br /> n(har ness)- .1485 <br /> Acute =(I.136672-[ln(hardness) x (0.041838)] )x e <br /> 4 <br />