Ill. Admin. Code tit. 35 § 303.446
The general use water quality standard for boron in 35 Ill. Adm. Code 302.208(g) does not apply to segments of the Sangamon River and the Illinois River described below that receive discharge from Outfall 007 of the Spring Creek Sewage Treatment Plant located at 3017 North 8th Street, Springfield, Illinois, owned by the Springfield Metro Sanitary District. The boron level in those river segments must meet the following water quality standard for boron: 11.0 mg/L in the Sangamon River from Outfall 007 (Latitude: 39° 51' 37.234" North, Longitude: 89° 38' 30.082" West) to 182 yards downstream from the confluence of Spring Creek with the Sangamon River (Latitude: 39° 51' 42.595" North, Longitude: 89° 38' 30.089" West);
Ill. Admin. Code tit. 35, § 303.446
Added at 33 Ill. Reg. 7903, effective May 29, 2009