Source Identification

Next meeting: SAM Study Selection Subgroup will meet in January 2023 to discuss RFP package for Round 4 study solicitation. For more information contact Amy Waterman.

Status update: All of the SAM source ID projects  are featured at ecology.wa.gov/SAM.   

Purpose: SAM Source ID projects are intended to help permittees address the most common sources of stormwater pollution by developing regional approaches and shared information.

History:  In September 2011 the SWG created this subgroup to oversee efforts to develop an information repository for source identification and diagnostic monitoring. The repository was envisioned to provide tools for local governments for improving source control and illicit discharge detection and elimination (IDDE) efforts and to guide collection and analysis of information to target and improve regional pollution reduction efforts.

SIDIR was envisioned to include two separate but connected types of information:

1.       Information on Methods and Resources for IDDE and source control to include protocols, case studies, example forms, and other information about strategies and actions for identifying and removing illicit discharges from municipal storm sewer systems.

2.       Information about the Results and Findings of IDDE and source control programs for regional analyses to identify common stormwater problems that could be supported or better addressed by regional efforts such as education, professional training, new BMPs, additional regulation, product replacement initiatives, legacy pollutant removal, improved source tracing tools, etc.

A Peer Network or other means of sharing information was also envisioned to be supported as part of SIDIR.

A Illicit Connection/Illicit Discharge (IC/ID) Field Screening Manual was developed under an Ecology Grant of Regional or Statewide Significance (GROSS grant) to King County. The manual describes field screening methods and considerations for each method, such as where the methods work best and what equipment, staff resources, and training are needed. The manual distinguishes between methods for discovering illicit discharge problems and methods for tracing the sources of the problems. In 2019 this manual  was updated in a SAM project and trainings were offered to permittees across the state in 2020-21. Videos are available on the Washington Stormwater Center webpage.

In 2016-17 the subgroup revised the IDDE tracking form for consideration by Ecology's permit managers. The 2019 permits include a standard means of reporting basic data about IDDE incidents.