Consolidated Total Maximum Daily Load (TMDL) Implementation Plan and Monitoring Program

PEER Consultants (PEER) is part of a consultant’s team providing professional engineering services to the District Department of Energy & Environment (DOEE) to develop a Consolidated Total Maximum Daily Load (TMDL) Implementation Plan (IP) and Monitoring Program in support of the District of Columbia’s goal to achieve compliance with the Clean Water Act.

PEER performed the following tasks:

  • Prepared a Quality Assurance Plan (QAPP) identifying procedures to ensure that the project team provides quality services and adherence to EPA guidelines and regulations. The QAPP included routine monitoring of the project to identify performance deficiency, follow-up to ensure successful resolution of deficiencies and procedures to address emergency requests; delineate the project team’s capability to provide quality services and to monitor and measure the effectiveness of the services; ensure adherence to EPA guidelines; and practices that are required to be implemented to monitor and evaluate the delivery of all services such as quality and timeliness of the delivery services.
  • Conducted a literature review to identify Best Management Practices (BMPs) and load reduction estimation methods and strategies, including cost and maintenance information.
  • Evaluated different methodologies for estimating loads and load reductions, and their applicability to the District focusing on urban BMPs. 
  • Performed detailed data analysis and prepared a final literature review document from the following sources: MS4 annual report; DC Stormwater Management Guidebook; Regional reports on BMPs, efficiency mean concentrations (EMCs), water quality, hydraulic modeling and costs using the stormwater unit cost model and cost adjustment indicators developed for Maryland counties; WERF urban stormwater BMP database; Reports from EPA’s Chesapeake Bay Program
  • Assisted in developing the TMDL Implementation Plan: Created a database with BMP projects following review of all the regional watershed implementation plans (WIPs) within the DC jurisdiction; Prepared and submitted a summary document for each WIP document; Conducted GIS analysis and prepared database for the IP modeling tool; Developed a database to track concerned pollutant in watersheds within DC jurisdiction
  • Assisted to refine and enhance the geodatabases of Best Management Practices: Reviewed of existing eletrocnic and paper records of construction inspections, maintenance inspections, “as-built” plans, Department of Cosumer Affairs (DCRA) building permits and certifictes of occupancy, and DC Watert and Sewer Authority permits and billing information to collect data on approced stormwater management plans and constructed BMPs; Updated the Stormwater BMP QuickBase Tracking Database based on information collected from plans, to include complete and up-to-date information on BMPs.