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EPA/WATER RIN: 2040-AE95 Publication ID: Spring 2008 
Title: ●Criteria and Standards for Cooling Water Intake Structures--Phase II Remand 
Abstract: Section 316(b) of the Clean Water Act (CWA) requires EPA to ensure that the location, design, construction, and capacity of cooling water intake structures reflect the best technology available (BTA) to protect aquatic organisms from being killed or injured by impingement or entrainment. EPA divided this rulemaking into three phases. Phase II, for existing electric generating plants that use at least 50 MGD of cooling water, was completed in July 2004. Industry and environmental stakeholders challenged the Phase II regulations. On judicial review, the Second Circuit remanded several key provisions. In July 2007, EPA suspended Phase II and is now initiating a new 316(b) Phase II rulemaking. EPA expects this new rulemaking will similarly apply to approximately 600 existing electric generating plants and will address the Second CircuitÂ’s issues on restoration, reliance on cost-benefit analysis, and the definition of BTA. 
Agency: Environmental Protection Agency(EPA)  Priority: Economically Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: Undetermined 
CFR Citation: 40 CFR 9    40 CFR 122    40 CFR 123    40 CFR 124    40 CFR 125   
Legal Authority: CWA 101    301    304    308    316    401    402    501    and 510   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  12/00/2008    
Additional Information: SAN No. 5210;
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State 
Small Entities Affected: Businesses, Governmental Jurisdictions, Organizations  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL: www.epa.gov/waterscience/316b  
RIN Data Printed in the FR: No 
Agency Contact:
Paul Shriner
Environmental Protection Agency
Water
4303T,
Washington, DC 20460
Phone:202 566-1076
Email: Shriner.Paul@epamail.epa.gov

Jan Matuszko
Environmental Protection Agency
Water
4303T, 1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 566-1035
Fax:202 566-1053
Email: matuszko.jan@epa.gov