Section 304.202  Chlor-alkali Mercury Discharges in St. Clair County

The mercury discharge standards of Section 304.124 and 35 Ill. Adm. Code 307.1102 do not apply to any manufacturing facility that operates chlor-alkali cells, is located in St. Clair County, and discharges directly or indirectly into the Mississippi River; or to any publicly owned treatment works that receives a manufacturing facility's wastewater.  The amount of mercury discharged by any such manufacturing facility must not exceed an average of 114 g/day (0.25 pounds per day) during any calendar month and a maximum of 227 g (0.5 pounds) during any one day.  Any publicly owned treatment works that, directly or indirectly, receives such a manufacturing facility's wastewater is entitled to discharge mercury exceeding the levels provided in Section 304.124 to the extent that the discharge exceeds those levels because of such a manufacturing facility's discharge.

(Source:  Amended at 47 Ill. Reg. 4601, effective March 23, 2023)