1. EPA’s Partial Approval of North Carolina’s 2014 303(d) List
Kathy Stecker
DWR Modeling and Assessment Branch
EPA’s Partial Approval of North Carolina’s (d) List

2. Summary NC submitted 2014 303(d) list to EPA March 31, 2014
List based on methodology approved by EMC March 2013
EPA issued decision document July 31, 2014
Partial approval of list as submitted, and
Proposed to add back 52 listings for metals
EPA’s public comment period ends Sept. 12
EMC September 2014

3. EPA Decision Document
EPA review concluded that NC’s approach was acceptable for most waterbody impairments
Agreed with listing 1194 waterbody-pollutant combinations
Agreed with 227 de-listings
EMC September 2014

4. EPA Decision Document EPA conclusion on NC’s current method for toxics
Not reasonable method to assess toxic pollutants consistent with NC’s current water quality standards
Not consistent with toxics criteria expressed as “maximum permissible levels”
Statistical confidence not necessary to account for uncertainty in data quality
EMC September 2014

5. Conclusion
EPA applied their recommended methodology of not greater than one exceedance in three years for toxics
EPA proposes to add back 52 listings
EPA’s public comment period ends Sept. 12
EMC September 2014

6. EMC September 2014

7. Questions?
EMC September 2014