The derogations provided for in Article R. 1321-40 concern the values of the following parameters:
1° With regard to 2°:
a) Colouring (after simple filtration) ;
b) (Repealed) ;
c) Sulphates ;
d) Nitrates ;
e) Ammonium ;
2° With regard to 4°:
a) (Repealed) ;
b) (Repealed) ;
c) Dissolved oxygen saturation rate ;
d) Nitrates.