Minnesota Administrative Rules

7049.0980 SUBSTANTIAL MODIFICATIONS DEFINED.

Substantial modifications include:

A.

modifications that relax POTW legal authorities, as described in part 7049.0820, except for modifications that directly reflect a revision to this chapter and are reported pursuant to part 7049.1000;

B.

modifications that relax local limits, except for the modifications to local limits for pH and reallocations of the maximum allowable industrial loading of a pollutant that do not increase the total industrial loadings for the pollutant, which are reported pursuant to part 7049.1000. "Maximum allowable industrial loading" means the total mass of a pollutant that all industrial users of a POTW, or a subgroup of industrial users identified by the POTW authority, may discharge pursuant to limits developed under part 7049.0850;

C.

changes to the POTW's control mechanism, as described in part 7049.0890;

D.

a decrease in the frequency of self-monitoring or reporting required of industrial users;

E.

a decrease in the frequency of industrial user inspections or sampling by the POTW;

F.

changes to the POTW's confidentiality procedures; and

G.

other modifications designated as substantial modifications by the agency on the basis that the modification could:

(1)

have a significant impact on the operation of the POTW's pretreatment program;

(2)

result in an increase in pollutant loadings at the POTW; or

(3)

result in less stringent requirements being imposed on industrial users of the POTW.

Statutory Authority:

MS s 115.03

History:

33 SR 696

Published Electronically:

November 6, 2008