584 - 584.1 WATI:R QUALITY CRITURIA 

 tFI'IXTIVK DATI-; MAKCII 14, 1977 



584 Water Quality Criteria 



1lie criteria listed lielow will ripply only In Secilon 363, slaiulurds ul clussincatiiiii of Iresh 

 waters, class b-l and 11-2. (he luiinbets rc|>resent inaxiiiiuin acceptable conceiitraliiiii liiuils in 

 the recelvin^^ waters All luiiiibers are expressed in micrograms |X'r liter (ug/l) 



584.1 Metals 



Milal Coiiciiilralioii 



A. Cliroiiiiiim 511 Uf;/I 



590.1 - VARIANCES FROM VARIOUS RlitJULATIONS 

 KIMXTIVi; DATI-; N0VI;MBI;R 29, I973; AMtNDliD DATE MAKCII 14, 1977 



590. 1 Variances 



Tlie board may, in any license or Order issued by it, impose on any discliuri'e limitations 

 more stringent than those rei|uired by Regulations 580, 581, 582, 583 and 584 whenever the 

 physical or chemical properties or biological phenomena in the receiving body ol water so 

 require in order to maintuin the statutory classiflcation. Ilie board may authorize a variance 

 Irom any ol the limits established iiereby whenever the applicant demonstrates that (a) because 

 ol physical or natural conditions in the receiving body of water such limits cannot be attained 

 and (b) maintenance ol siicii limits are not necessary to protect organisms in the receiving water 

 from substantial adverse effects and (cl the proposed discharge will assure the protection and 

 propagation of a balanced and indigenous population offish, shelltish and wildlife in and >m the 

 receiving body of water 



591.1 - l-XCI I'TIONS lOR VARIOUS RWaUATIONS 



i:fii;ctivi' uatk novi;mbi-.r 29, 1973; ami-ndi » date mar( 11 14, 1977 



591.1 



No provision of Regulations 580, 581, 582, 583, 584 and 59(1 shall be deemed to change, 

 alter, affect or supersede the terms or conditions of any Order or license heretofore issued by 

 the Hoard ol l.nviroiimental Protection. 



3-B-58 



