Appendix A4. Combined Waste Formula

Combined Waste Stream Formula

Alternative limit calculation; for the purposes of these formulas, the "average daily flow" means a reasonable measure of the average daily flow for a 30-day period.

Alternative concentration limit:

CT

= the alternative concentration limit for the combined waste stream.

C _i

= the categorical Pretreatment Standard concentration limit for a pollutant in the regulated stream I.

F _i

= the average daily flow of the stream I to the extent that it is regulated for such pollutant.

F _D

= the average daily flow from (a) Boiler blow down streams, non-contact cooling streams, storm water streams, (b) sanitary waste streams, © process waste streams exempted from Categorical Pretreatment Standards.

F _T

= the average daily flow through the combined treatment facility (includes F _i , F _D , and unregulated streams).

N

= the total number of regulated streams.

Alternative mass limit:

M _T

= the alternative mass limit for a pollutant in the combined waste stream.

M _i

= the categorical Pretreatment Standard mass limit for a pollutant in the regulated stream 1 (the categorical pretreatment mass limit multiplied by the appropriate measure of production).

F _i

= the average flow of stream I to the extent that it is regulated for such pollutant.

F _D

= the average daily flow through the combined treatment facility (includes F _i , F _D , and unregulated streams).

N

= the total number of regulated streams.

(Res. No. 06-1167, 11-15-06)