40 CFR Part 125, Subpart G - Criteria for Modifying the Secondary Treatment Requirements Under Section 301(h) of the Clean Water Act

The Environmental Protection Agency (EPA) proposes revisions to the National Pollutant Discharge Elimination System regulations to eliminate regulatory and application form inconsistencies; improve permit documentation, transparency and oversight; clarify existing regulations; and remove outdated provisions. This proposal would make specific targeted changes to the existing regulations and would not reopen the regulations for other specific or comprehensive revision. These proposed regulatory changes cover 15 topics in the following major categories: permit applications; the water quality-based permitting process; permit objection, documentation and process efficiencies; the vessels exclusion; and the Clean Water Act (CWA) section 401 certification process. These revisions would further align NPDES regulations with statutory requirements from the 1987 CWA Amendments and more recent case law requirements. By modernizing the NPDES regulations, the proposed revisions would provide NPDES permit writers with improved tools to write well-documented permits to protect human health and the environment. The revisions would also provide the public with enhanced opportunities for public participation in permitting actions.

The purpose of this action is to reduce impingement and entrainment of fish and other aquatic organisms at cooling water intake structures used by certain existing power generation and manufacturing facilities for the withdrawal of cooling water from waters of the United States. This rule establishes requirements under section 316(b) of the Clean Water Act (CWA) for existing power generating facilities and existing manufacturing and industrial facilities that are designed to withdraw more than 2 million gallons per day (mgd) of water from waters of the United States and use at least 25 percent of the water they withdraw exclusively for cooling purposes. These national requirements, which will be implemented through National Pollutant Discharge Elimination System (NPDES) permits, apply to the location, design, construction, and capacity of cooling water intake structures (CWIS) at regulated facilities and provide requirements that reflect the best technology available (BTA) for minimizing adverse environmental impact. On April 20, 2011, EPA published a proposed rule that included several options for addressing these impacts. Subsequently, EPA published two Notices of Data Availability (NODA), on June 11, 2012 and June 12, 2012, that further clarified EPA's proposed approach. This final rule also responds to judicial remand of aspects of the previously promulgated Phase II and Phase III section 316(b) rules. In addition, EPA is also responding to an earlier judicial decision by removing from the previously promulgated Phase I new facility rule a restoration-based compliance alternative and the associated monitoring and demonstration requirements.

On April 20, 2011, EPA published proposed standards for cooling water intake structures at all existing power generating, manufacturing, and industrial facilities as part of implementing section 316(b) of the Clean Water Act (CWA). This notice presents a summary of new information EPA has developed since the rule proposal. The information results from a stated preference survey that EPA conducted after the proposed rule was published. Stated preference surveys are an attempt to determine the economic value of goods or services by means other than by assessing the effects of changes in the market for the goods and services. In this notice EPA solicits comment on the information presented in this notice and on what role, if any, it should play in EPA's assessment of the benefits of regulatory options for the final rule, pending completion of the survey and external peer review.