) 



) 



walcr truiii substanli;il adverse elTccls. 



581.6 r.reat Ponds Trophic Slate Index (TSI) 



lor tlic purposes of de(erniining tropliic slate of great ponds Uic following Iropliic slate 

 index will be u.sc(!. 



Zero un this scale indicates poor water <|ualily and lOU indicates excollcnl water (|Ualily. 

 Tlie TSI is denned as 40 + 33 (logio niininiuni Secchi disk transparency in meters) Average 

 chlurupliyll a and spring total phosphorus may also be related (o TSI 



551. 7 Stream S|)ccics Diversity Index 



llic generic diversity of the bottom fauna of waters classified HI and U-2 shall not be less 

 than 2.2 as measured by the Shannon-Weiner diversity index. 



582.1 - 582.8 TiiMPIiRATURli 

 liHUCTIVIi DAT1-: NOVIiMBKR 29, 1973 



S82.I Freshwater Thermal Discharges 



No discharge of pollutants shall cause the ambient temperature of any freshwater body, as 

 measured outside a mixing zone, to be raised more than 5°l' or more than 3''l' in the epiliinnion 

 of any lake or pond. In no event shall any discharge cause the temperature of any freshwater 

 body to exceed 84°l' at any point outside a mixing zone established by the board, nor shall 

 such discharge cause the temperature of any waters which presently are designed as trout or 

 salmon waters to exceed 68°l' at any point outside a mixing zone established by the board. 



582.2-4 Reserved 



582.5 Tidal Water Thermal Discharges 



No discharge of pollutants shall cause the monthly mean of the dally niaMiiiiiiii ainbieni 

 tem|>eratures in any tidal body of water, as measured outside the mixing zone, (o be raised 

 more than 4°l' nor more than I.S°I' from June I to Sepleinber I. In no event shall any 

 discharge cause the lem|ierature of any tidal waters lo exceed 85"r al any point outside a 

 mixing ztme established by the board 



582.6-8 Reserved 



583.1 - 583.3 NUTRIUNT CONCI'NTRATKJN 

 EFITiCTIVI'; DATli NOVbMBIiR 29, 1973; AMENDED DATE MARCH 14, 1977 



583.1 Phosphorus 



There shall be no additional discharge of phosphorus to any lake or pond or tributary 

 thereto which discharge does not employ the best available technology for phosphorus removal. 



583.2 



l'!xisting discharges of phosphorus to any lake, pond or tributary thereto shall, on or before 

 October I, 1976, be treated to remove phosphorus lo llie inaxiniuni extent lechnically feasible. 



583.3 Phosphorus Concentrations in Tributaries to (ircat Ponds 



Nolwilhslanding Sections 583.1 and 583.2, the ainblenl concentration for lotal phosphorus 

 in all tributaries to ('-real Ponds shall not exceed SO micrograms per liter (SO ug/l). 



\ 



3-B-57 



10-80 



