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March 8, 2004

Oxon Run and C&O Canal TMDLs. March 8, 2004. Overview. In settlement of the TMDL lawsuit in the District of Columbia, EPA has agreed to back stop TMDLs for waters included on the District's 1998 Section 303(d) list of impaired waters.

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March 8, 2004

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  1. Oxon Run and C&O Canal TMDLs March 8, 2004

  2. Overview • In settlement of the TMDL lawsuit in the District of Columbia, EPA has agreed to back stop TMDLs for waters included on the District's 1998 Section 303(d) list of impaired waters. • To fulfill the consent decree requirements, EPA and the District to are sharing the TMDL development workload. • EPA must approve or establish TMDLs for the Chesapeake and Ohio Canal and Oxon Run by December 15, 2004, in order to satisfy the requirements of the lawsuit.

  3. Overview • The District's 2002 Section 303(d) list of impaired waters identified the pollutant of concern as follows: • Metals and bacteria as Oxon Run's pollutants of concern, and • Bacteria and organics as the Chesapeake and Ohio Canal's pollutants of concern. • The Consent Decree identifies "metals" as the substances identified in Table 2 of Section 1104.7 of the District's water quality standards, and, "organics" as the substances identified in Table 3 of Section 1104.7 of the District's water quality standards at 21 D.C.M.R. Chapter 11.

  4. Pollutants of Concern

  5. Task Overview • Problem Identification • Sources assessment • Numeric Targets • Technical Approach Development • Allocation Scenarios (DOH) • Draft TMDLs • Final TMDLs

  6. Schedule • Sources assessment and the technical approach needs to be completed by June 1, 2004. • Draft TMDL report submitted to Region 3 and DOH for internal review & comment by August 1, 2004. • Revised draft TMDL to the Region and DOH (incorporating the comments) by September 1, 2004. • Final TMDL report submitted to EPA by November 15, 2004. • Final TMDL report must be approved by EPA by December 15, 2004.

  7. Data and Information • Categories of Data • Watershed Physiographic data • Weather Data • Potential Pollutant Sources • Water quality data • Stream Flow Data

  8. Status • DOH is in the process of identifying the available monitoring data • MDE has no instream water quality data related to these segments • County Stormwater monitoring programs

  9. Data Needs….. • Watershed physiographic data • Hydrographic data • Weather data • Watershed activities/use data and information related to Pollutant production • Point sources and direct discharge data and information • Environmental monitoring data • Stream flow data

  10. TMDL Contacts Mary F. Beck TMDL Technical Support EPA Region 3 (215) 814-3429 Beck.mary@epa.gov Jonathan Essoka DC TMDL Coordinator EPA Region 3 (215) 814-5774 Essoka.Jonathan@epamail.epa.gov Raed EL-Farhan The Louis Berger Group, Inc. Washington, DC (202) 912-0307 relfarhan@louisberger.com

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