October 14, 1971NATIONAL STARCH AND CHEMICALCORPORATION v.
) PCB 71—83
ENVIRONMENTAL PROTECTION AGENCYMr.
A hearing was held on June 18 at which the Environmental
Protection Agency (EPA) was not, present.
The combined
effluent from both waste streams is then discharged to the IllinoisRiver, In 1967, National engaged a consultant to study the plant’seffluent, Certain major physical changes in the plant were madeand the cooling water was separated from the contaminated wastewater (R.46).
With the changes the retention time in the stabilization
lagoons was increased from approximately 1 day to more than10 days (R.20).
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