The Maryland water quality regulations state that all surface waters of Maryland shall be protected for water contact recreation, fishing, and protection of aquatic life and wildlife (COMAR 2007a). The specific designated use of Corsica River of the Lower Chester River Mesohaline segment (also referred to as the Corsica River embayment ) is Use II Support of Estuarine and Marine Aquatic Life and Shellfish Harvesting (COMAR 2007b). The Maryland Department of the Environment (MDE) has identified the waters of the Corsica River of the Lower Chester River Mesohaline segment on the States Integrated Report as impaired by the following pollutants (listing year and Integrated Report Assessment Unit Identification in parentheses): sediments later changed to a total suspended solids (TSS) listing (1996; MD-CHSMH), nutrients (1996; MDCHSMH), fecal coliform (1996; MD-CHSMH-Corsica-River), polychlorinated biphenyls (PCBs) in fish tissue (2002; MD-CHSMH-02130507), and impacts to biological communities (2004; MDCHSMH) (MDE 2008). Nitrogen and phosphorus TMDLs and a fecal coliform TMDL for the restricted shellfish harvesting portion of the Corsica River were approved by the US EPA in 2000 and 2005, respectively. The sediments listing will be addressed via the Chesapeake Bay TMDL scheduled to be established by the end of 2010. This document, upon US EPA approval, establishes a total PCB (tPCB) TMDL for the Corsica River of the Lower Chester River Mesohaline segment (MDCHSMH- 02130507). Data solicitation for PCB related information was conducted by MDE, and all readily available data have been considered.