A bill to amend the Federal Water Pollution Control Act to allow modifications of certain effluent limitations relating to biochemical oxygen demand and pH.

[AI summary unavailable — showing source text] Amends the Federal Water Pollution Control Act to authorize the Administrator of the Environmental Protection Agency, with State concurrence, to issue a permit which would modify specified effluent limitation requirements (dealing with biochemical oxygen demand and pH) for an industrial discharger, in such State, who makes discharges into deep waters of the territorial seas. Requires the applicant for a modified permit to make specified demonstrations including a showing that on or before March 17, 1977: (1) the State had authority to administer its own permit program; and (2) the applicant has received approval for the modifications from the appropriate State agency. Sets forth requirements for modified effluent limitations. Limits a modified permit to a five-year period, with additional five-year renewals upon a showing by the applicant that the requirements of this Act are met. Authorizes the Administrator to terminate a modified permit upon finding that there has been a decline in the ambient water quality of receiving waters during the period of the permit, even if a direct cause and effect relationship cannot be shown.…