Final Action on Florida's 2010 Group Four Update To

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Final Action on Florida's 2010 Group Four Update To DECISION DOCUMENT REGARDING FLORIDA DEPARTMENT OF ENVIRONMENTAL PROTECTION’S SECTION 303(d) LIST AMENDMENTS FOR BASIN GROUP 4 Prepared by the Environmental Protection Agency, Region 4 Water Protection Division December 21, 2010 Florida §303(d) List Decision Document December 21, 2010 Table of Contents I Executive Summary 4 II. Statutory and Regulatory Background 7 A. Identification of Water Quality Limited Segments (WQLSs) for Inclusion on the Section 303(d) List 7 B. Consideration of Existing and Readily Available Water Quality-Related Data and Information 7 C. Priority Ranking 8 III. Analysis of the Florida Department of Environmental Protection’s Submission 8 A. Florida’s 2010 Group 4 Update 9 1. Florida’s Water Quality Standards and Section 303(d) List Development 9 a. Florida’s numeric water quality criteria 10 b. Florida’s narrative water quality criteria 10 2. List Development Methodology and Data Assessment 11 3. Public Participation Process 12 4. Consideration of Existing and Readily Available Water Quality Related Data and Information 13 B. Review of FDEP’s Identification of Waters (40 CFR 130.7(b)(6)(i - iv)) 15 1. Review of FDEP’s Data Guidelines 16 a. Minimum Sample Size 17 b. Age of Data 17 2. Waterbodies Verified Impaired but no Pollutant causing Impairment Identified 18 3. Aquatic life use support 19 a. Exceedances of numeric water quality criteria 19 b. Waterbodies not Listed due to Natural Conditions 21 c. Impairments Indicated by Biological Information 23 2 Florida §303(d) List Decision Document December 21, 2010 d. Impairments Indicated by Nutrient Information 23 4. Primary and Secondary Recreational Use Support 25 5. Fish and Shellfish Consumption Use Support 25 6. Drinking Water Use Support and Protection of Human Health 26 C. Section 303(d) List of Impaired Waters (40 CFR 130.7(b)(4)) 27 1. FDEP’s Addition of Water Quality Limited Segments 27 2. FDEP’s Delisting of Water Quality Limited Segments 27 3. Other Pollution Control Requirements 28 4. EPA Identified Waters 28 5. Priority Ranking and Targeting 29 IV. Final Recommendation on Florida’s 2010 Section 303(d) List Submittal 30 Appendix A 2003 EPA-approved section 303(d) list for the State of Florida Appendix B Group 3 Water Quality Limited Segments added by FDEP to the Florida section 303(d) list Appendix C Group 3 Water Quality Limited Segments added by EPA to the Florida section 303(d) list Appendix D Group 3 Water Quality Limited Segments removed by FDEP from the Florida section 303(d) list Appendix E FDEP Resegmentation Crosswalk Table submitted to EPA November 19, 2010 Appendix F FDEP’s Rotating Basin Approach Appendix G Assessing Ambient Data for Naturally Variable Parameters Against Numeric Water Quality Criteria Appendix H FDEP Data Exclusion Screens 3 Florida §303(d) List Decision Document December 21, 2010 I Executive Summary On November 19, 2010, the Florida Department of Environmental Protection (FDEP) submitted its 2010 Group 4 update to the state’s previously approved section 303(d) list to the Environmental Protection Agency (EPA) for review. This section 303(d) list update submission is referred to in this document as the 2010 Group 4 Update. Florida’s 2010 Group 4 submittal is an update, for waterbodies in Group 4 basins, to the state’s previously approved section 303(d) list.1 Following its review of Florida’s 2010 Group 4 Update, EPA is approving that list in part and is adding waters to the state’s section 303(d) list. This document summarizes EPA’s review and the basis for the Agency’s decision. Section 303(d)(1) of the Clean Water Act (CWA or Act) directs states to identify those waters within their jurisdictions for which effluent limitations required by sections 301(b)(1)(A) and (B) of the Act are not stringent enough to implement any applicable water quality standard (referred to as water quality limited segments, as defined in 40 C.F.R. § 130.7), and to establish a priority ranking for such waters, taking into account the severity of the pollution and the uses to be made of such waters. The section 303(d) listing requirement applies to water quality limited segments impaired by pollutant loadings from both point and/or nonpoint sources. After a state submits its section 303(d) list to EPA, the Agency is required to approve or disapprove that list. FDEP assessed waters for the 2010 Group 4 Update pursuant to its approved water quality standards, including the water quality standards contained in the Impaired Waters Rule, commonly referred to as the IWR. Through the Florida Watershed Restoration Act, the state legislature directed the Florida Department of Environmental Protection (FDEP) to develop and adopt by rule a methodology to identify waters that do not meet the State’s approved water quality standards and, therefore, are required to be included on section 303(d) lists. See Identification of Impaired Surface Waters, Chapter 62-303, Florida Administrative Code (F.A.C.). EPA determined certain provisions of the IWR to be new or revised water quality standards2 and approved those standards on February 19, 2008.3 EPA views other IWR provisions as part of FDEP’s section 303(d) listing methodologies. Consistent with EPA’s implementing regulations and guidance, EPA considered these methodologies, to the extent that they reflect a reasonable 1 On September 2, 2009, EPA took action on Florida’s update to the section 303(d) list for Group One, Two and Five basins. Complete listings of the changes to Florida’s previously approved section 303(d) list for Group One, Two and Five basins as a result of that update are set out in EPA’s Amended Decision Document Regarding Florida Department of Environmental Protection’s Section 303(d) List Amendments for Basin Groups One, Two and Five. On May 13, 2010, EPA took action on Florida’s update to the section 303(d) list for Group Three basins. Complete listings of the changes to Florida’s previously approved section 303(d) list for Group Three basins as a result of that update are set out in EPA’s Decision Document Regarding Florida Department of Environmental Protection’s Section 303(d) List Amendments for Basin Group Three. 2 Determination Upon Review of Amended Florida Administrative Code Chapter 62-3-3, Identification of Impaired Waters. United States Environmental Protection Agency, February 19, 2008 (2008 IWR Determination). 3 Letter from James D, Giattina to Michael W. Sole. February 19, 2008 (2008 IWR Approval Letter). 4 Florida §303(d) List Decision Document December 21, 2010 interpretation of Florida’s water quality standards and sound science, when it reviewed FDEP’s section 303(d) list submittals. Waters that are not attaining Florida’s water quality standards are identified by FDEP as water quality limited segments and submitted to EPA as an update to Florida’s then-current section 303(d) list. The water quality standards and listing methodologies contained in the IWR establish specific protocols and thresholds for assessing waterbodies, in addition to data sufficiency and data quality requirements. The IWR contains procedures for assessing both aquatic life use support and human health use support. FDEP conducts these assessments based on Florida’s rotating basin approach. Florida waters are divided into five basin groups, with each group representing approximately 20% of state watersheds. Each year, FDEP assesses waterbodies within one group of basins. Lists based on those basin assessments constitute updates to the state’s then-current section 303(d) list. All five basin groups are assessed within a five year period. All waters which were included in Florida’s approved 1998 section 303(d) list will remain on Florida’s section 303(d) list, unless FDEP removes a waterbody and EPA approves that removal. FDEP submitted a 2002 update to EPA for review, assessing Group One waterbodies. EPA’s decision partially approving that update and partially disapproving and adding waters to Florida’s section 303(d) list was challenged in court. While that litigation, and related litigation challenging the IWR, were pending, FDEP developed basin group assessment reports but did not submit section 303(d) lists to EPA. On September 3, 2009, EPA approved in part and added waters to FDEP’s Update for Group One, Two and Five basins; on May 13, 2010, EPA approved in part and added waters to FDEP’s Update for Group Three basins. On November 19, 2010, FDEP submitted its Group 4 update to EPA for review. FDEP’s updated list submittal includes, among other things: Additional waterbodies in Group 4 which FDEP determined to be water quality limited segments. Group 4 waterbodies included on Florida’s previously approved 1998 section 303(d) list which were determined not to need TMDLs and were, therefore, removed from Florida’s section 303(d) list as submitted to EPA. EPA reviewed FDEP’s submittal to determine whether the 2010 Group 4 Update appropriately assessed waters based on Florida’s water quality standards, including those provisions of the IWR which have themselves been determined to be water quality standards and approved by EPA pursuant to Section 303(c) of the CWA. EPA further considered whether those provisions of the IWR which it determined to be listing methodologies reasonably identified water quality limited segments, considering the state’s water quality standards. Where EPA was unsure whether the methodology was a reasonable method for identifying water quality limited segments, the Region conducted further waterbody and data analysis. 5 Florida §303(d) List Decision Document December 21, 2010 The Agency reviewed FDEP’s waterbody assessments for all designated uses, based on Florida’s water quality standards. EPA concluded that FDEP was largely successful in assessing the Group 4 waterbodies for attainment of designated uses and water quality criteria, including aquatic life use support and water quality criteria for most naturally variable indicator pollutants, aquatic life use support for water quality criteria with a toxic effect, aquatic life use support and narrative water quality criteria for nutrient impairments, fish consumption use support, and use support for those pollutants with water quality criteria expressed as an annual average.
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