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Bioretention amendment with fungi study

U.S. Fish and Wildlife is partnering with Washington State University-Puyallup to evaluate improvements in the default bioretention soil mix (60 perecent sand and 40 percent compost) capacity to reduce nutrient, bacteria, and metal pollutants when amended with fungal spores and plants. Toxicity to daphnids and zebrafish will be evaluated with the amended soils.

Study questions

The study’s sampling quality assurance project plan provides information on the sites and study design.

  • Do fungal and/or plant amendments improve the effectiveness of the default bioretention soil mix to reduce metal, fecal coliforms, and nutrient pollution from highway runoff?
  • Are the amended mixes still capable of preventing toxicity to aquatic organisms?

Study findings

Monitoring is underway through 2018.

Project tasks and deliverables

Scope of Work

Task 1 QAPP D1      
Task 2 Build and condition bioretention cells, baseline testing of materials D2.1 & D2.2      
Task 3 Baseline water quality, sediment chemistry and cell conditions D3.1 D3.2 D3.3  
Task 4 Report on conditioned cell’s microbiology, chemistry, toxicity D4.1 D4.2    
Task 5 Monitoring - 6 month reports on flow, water quality and toxicity D5.1 D5.2 D5.3  
Task 6 Report on interim results regarding accumulation/mobilization D6.1      
Task 7 Final report, fact sheet and 2 presentations D7.1a D7.1b D7.1c D7.1d