Stormwater particle size distribution & BMP effectiveness

A literature review project to gather up-to-date information on particles and contaminants in stormwater, and the best management practices to capture and treat them.

The Washington State Department of Natural Resources (WDNR) is working with Evergreen StormH20 to conduct this literature review project. The goals are to gather up-to-date information about the size of particles in stormwater, bound contaminants, and the effectiveness of a range of treatment approaches for those particle sizes.

Study questions

Gather information about the different methods to measure particle size distribution (PSD) and how do they compare?
What is more recently known about characterized sources, and nature of particle sizes and attached pollutants transported in the MS4 or delivered to BMPs?
What is the reported effectiveness of concentration or load reduction by stormwater BMPs as a function of PSD?

Study findings

This study is ongoing until November 2023.

Project tasks and deliverables

Scope of Work

Task 1: Project administration and management

Deliverable 1.1 Refined project scope
Deliverable 1.2. First status report
Deliverable 1.3. Second status report
Deliverable 1.4. Third status report
Deliverable 1.5 Confirmed list of TAC members
Deliverable 1.6 TAC Meeting #1 agenda and minutes
Deliverable 1.7 TAC Meeting #2 agenda and minutes
Deliverable 1.8 TAC Meeting #3 agenda and minutes

Task 2: Literature search and synthesis

Deliverable 2.1 Synthesis of literature
Deliverable 2.2 List of data sources
Deliverable 2.3 Data summary tables

Task 3 Summarize, report, and communicate findings

Deliverable 3.1 Report outline
Deliverable 3.2 Draft flowcharts
Deliverable 3.3 Final flowcharts
Deliverable 3.4 Draft white paper
Deliverable 3.5 Final white paper
Deliverable 3.6 Draft fact sheet
Deliverable 3.7 Final fact sheet
Deliverable 3.8 Final SAM and local conference presentations

Contact information

Brandi Lubliner
Stormwater Action Monitoring Coordinator
brandi.lubliner@ecy.wa.gov
360-407-7140

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