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Update on Federal Actions Related to Copper in Water -- 2005

Update on Federal Actions Related to Copper in Water -- 2005. Jim Pendergast USEPA -- HQ WQS Program. Topics for Today. National extent of copper impairments National copper water quality criterion California Toxics Rule. Number of Copper Impairments by State (from 2002 303(d) lists).

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Update on Federal Actions Related to Copper in Water -- 2005

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  1. Update on Federal Actions Related to Copper in Water -- 2005 Jim Pendergast USEPA -- HQ WQS Program

  2. Topics for Today • National extent of copper impairments • National copper water quality criterion • California Toxics Rule

  3. Number of Copper Impairments by State(from 2002 303(d) lists) Undefined metals identified 1-5 6-20 21-50 Source: EPA TMDL web site More than 50

  4. Top 10 States: Number of Copper Impairments(from 2002 303(d) lists)(total of 681 from 59,783 reports) Source: EPA TMDL web site

  5. National 2003 Draft Marine Copper Criteria *Not to be exceeded more than once every three years

  6. National 2003 Draft Marine Copper Criteria • Why the change? • New data from literature search (mostly Mytilus spp., a mollusk) • Halved Final Acute Value to account for commercially and recreationally important mussels • Why not use the Biotic Ligand Model? • Only developed for fresh water • When will the draft be finalized? • Projected for early 2006

  7. Changes to CA Toxics Rule • California Toxics Rule (CTR) published by EPA in May 2000 • Sets marine acute criterion of 4.8 ug/l and chronic criterion of 3.1 ug/l, as modified by water effect ratio • EPA withdrew rule for south SFB in Nov. 2003 • CA site specific objectives of 10.8 ug/l acute and 6.9 ug/l chronic now apply • EPA now revising CTR for mercury and cadmium • But no plans to update for copper yet

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