Ocean Standards - CWA §316(b) Regulation


COOLING WATER INTAKE STRUCTURES
ONCE-THROUGH COOLING WATER POLICY - OFFICIAL POLICY DOCUMENTATION

On May 4, 2010, the State Water Resources Control Board (State Water Board) adopted the statewide Water Quality Control Policy on the Use of Coastal and Estuarine Waters for Power Plant Cooling (Once-Through Cooling or OTC Policy) under Resolution Number 2010-0020. The OTC Policy became effective on October 1, 2010, and was amended in 2012, 2014, 2016, and 2017. The OTC Policy establishes uniform, technology-based standards to implement federal Clean Water Act (CWA) Section 316(b) and reduce the harmful effects associated with cooling water intake structures on marine and estuarine life.

Once-Through Cooling Policy – CURRENT VERSION

Table of OTC Policy Amendment History - Dates and Short Summaries

Policy Amendments

2020 – Amendment to Revise Compliance Schedules for Alamitos, Huntington Beach, Ormond Beach, and Redondo Beach Generating Stations and Diablo Canyon Nuclear Power Plant

2017 - Encina Power Station Compliance Date Extension Amendment

2016 - Moss Landing Power Station Compliance Date Extension Amendment

2014 - Reassignment of NPDES Permitting Responsibility to Regional Boards Amendment

2012 - LADWP Power Stations Compliance Dates Extension and Additional Entrainment Measures Amendment


2010 Policy Adoption


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