TMDL_PN_West_Chesapeake_Sediment

Other West Chesapeake Watershed, Anne Arundel and Calvert Counties, Maryland

Notice of Intent to Establish a TMDL for Sediment

Section 303(d) of the federal Clean Water Act (CWA) directs States to identify and list waters, known as water quality limited segments (WQLSs), in which current required controls of a specified substance are inadequate to achieve water quality standards.  For each WQLS, the State is required to establish a Total Maximum Daily Load (TMDL) of the specified substance(s) that the waterbody can receive without violating water quality standards, demonstrate that another program or action will achieve water quality standards, or demonstrate via the development of a Water Quality Analysis (WQA) that water quality standards for the specified substance(s) are currently being achieved.  The Maryland Department of the Environment (MDE) hereby gives notice of the public availability of a draft TMDL document for Sediment for the Non-Tidal Other West Chesapeake Bay Watershed (basin code 02131005).
 
The Maryland Department of the Environment (MDE) identified the waters of the
Other West Chesapeake watershed on the State’s 2014 Integrated Report as impaired by multiple pollutants including nutrients, sediment, fecal coliform and for impacts to biological communities. The Other West Chesapeake is associated with two assessment units in Maryland’s Integrated Report: a non-tidal 8-digit watershed (02131005) and an estuary portion (Chesapeake Bay segment Middle Chesapeake Bay Mesohaline). For more details about these listings, please see the TMDL report being made available for public comment. A data solicitation for TSS/sediment was conducted by MDE in November 2016, and all readily available data have been considered.
 
The TMDL sets the maximum load limit for the impairing substance.  The TMDLs also reflect load allocations to point sources, nonpoint sources and a margin of safety that accounts for uncertainty in the procedures used to estimate the TMDLs.  Once established by the State, the TMDLs will be subject to approval by the U.S. EPA.  The approved TMDLs will support measures needed to attain water quality standards in the Non-Tidal Other West Chesapeake Bay Watershed. 
 
OPPORTUNITY FOR PUBLIC REVIEW AND COMMENT
 
A 30-day public comment period for the draft document will take place from September 13, 2017 to October 12, 2017. Copies of the draft document have been placed in the Deale Community Library, 5940 Deale-Churchton Road, Deale MD 20751; and the Calvert Library – Prince Frederick, 850 Costley Way, Prince Frederick, MD 20678.  The draft document is also available on the Internet at web site http://www.mde.maryland.gov/TMDL or by contacting Ms. Melissa Chatham by mail at MDE/SSA, 1800 Washington Boulevard, Baltimore, MD 21230, or by telephone at 410-537-3937 (outside the Baltimore area, dial 1-800-633-6101 x3937).  Anyone wishing to review the draft documents and supporting information or needing technical information may contact Ms. Chatham during normal business hours. 
Written comments concerning the draft document may be submitted to the Department on or before October 12, 2017 and should be sent to Ms. Chatham at the above address or emailed to melissa.chatham@maryland.gov.  All comments received during the comment period will be considered and the draft document may be revised accordingly prior to its submittal to EPA for approval.
 

Draft Total Maximum Daily Load of Sediment
in the Non-Tidal Other West Chesapeake Watershed,
Anne Arundel and Calvert Counties, MD

Fact Sheet OWC_TSS_TMDL_fact_sheet.pdf (243KB)
Main Report OWC_Sed_TMDL_PN.pdf (933B)
Point Source Technical Memorandum OWC_Sed_TMDL_PS_TechMemo.pdf (141KB)
Nonpoint Source Technical Memorandum OWC_Sed_TMDL_NPS_TechMemo.pdf (130KB)

Additional Supporting Information

Biological Stressor Identification Other West Chesapeake Watershed Report (466KB)

Biological Stressor Identification Methodology (459KB)

Nontidal Sediment TMDL Methodology Report (361KB)

Addendum to the Nontidal Sediment TMDL Methodology Report (23KB)