march 8, 2004. overview in settlement of the tmdl lawsuit in the district of columbia, epa has...
TRANSCRIPT
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.
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.
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.
Pollutants of Concern
Pathogens Bacteria
Organics
Total polychlorinated biphenyls (TPCBs)Total polynuclear aromatic hydrocarbons (TPAHs)ChlordaneDDT
DieldrinHeptachlorepoxideGamma-BHCEndrinMirexEndosulfane (II) Hexachorobenzene
Metals
CadmiumChromiumLeadNickelSelenium
CopperMercuryArsenicZinc
Task Overview
1. Problem Identification Sources assessment Numeric Targets
2. Technical Approach Development3. Allocation Scenarios (DOH)4. Draft TMDLs5. Final TMDLs
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.
Data and Information
Categories of Data Watershed Physiographic data Weather Data Potential Pollutant Sources Water quality data Stream Flow Data
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
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
TMDL Contacts
Mary F. BeckTMDL Technical SupportEPA Region 3(215) [email protected]
Jonathan EssokaDC TMDL CoordinatorEPA Region 3(215) [email protected]
Raed EL-Farhan The Louis Berger Group, Inc.Washington, DC (202) [email protected]