Section 304.219  North Shore Sanitary District Phosphorus Discharges

a)         This Section applies to discharges from the North Shore Sanitary District excess flow discharge facilities at Waukegan and North Chicago into Lake Michigan;

b)         The requirements of Section 304.123(a) shall not apply to the phosphorus content of the North Shore Sanitary District excess flow discharges from Waukegan and North Chicago into Lake Michigan.  Instead, the following requirements shall apply to North Shore Sanitary District discharges into Lake Michigan:

1)         The North Shore Sanitary District shall discharge no effluent into Lake Michigan from its Waukegan treatment plant until after that plant has achieved its maximum treatment flow capacity and all the Waukegan treatment plant excess flow retention reservoirs are full to capacity;

2)         The North Shore Sanitary District shall discharge no effluent into Lake Michigan from its North Chicago treatment plant until after that plant has achieved its maximum treatment flow capacity, the North Chicago treatment plant excess flow retention reservoirs are full to capacity, the maximum rate of transfer of untreated effluent to Gurnee has been achieved, the Gurnee treatment plant has achieved its maximum treatment flow capacity, and the Gurnee treatment plant excess flow retention reservoirs are full to capacity.

c)         The North Shore Sanitary District shall increase the maximum peak treatment flow capacity of its Waukegan treatment plant to at least 44 million gallons per day before January 1, 1992;

d)         The North Shore Sanitary District shall increase the maximum peak treatment flow capacity of its Gurnee treatment plant to 39 million gallons per day before January 1, 1989;

e)         The North Shore Sanitary District shall increase the excess flow retention reservoir capacity at its Gurnee treatment plant to 50 million gallons before January 1, 1991;

f)          The North Shore Sanitary District shall operate its Waukegan or North Chicago treatment plant at its maximum treatment flow capacity during any period in which less than 90 percent of the retention reservoir capacity is available to receive excess flows at the relevant treatment plant, except when such unavailability results during times of normal treatment plant and/or retention basin maintenance; and

g)         The North Shore Sanitary District shall, as required pursuant to Section 309.141, immediately embark on a program of excess flow and water quality impact monitoring, shall periodically submit the data from such monitoring to the Illinois Environmental Protection Agency ("Agency"), and shall submit a comprehensive study of this data and monitoring for the period 1987 through 1991 to the Board and the Agency before April 1, 1992.

(Source:  Amended at 12 Ill. Reg. 20126, effective November 16, 1988)