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Fungi Project

Purpose

Evaluate amendments to the default bioretention mixture (60% sand : 40% compost) for reduction of nutrients, bacteria, chemical toxicants, and toxicity to aquatic organisms.

Scope

Replicate installations (n = 3 per treatment) of bioretention amended with plants and/or fungi were constructed at the WSDOT ‘Ultra-urban stormwater testing facility’ in Seattle, WA where they treated stormwater from I-5 and the surrounding watershed over 2 years. Hydrology, chemistry, and toxicology was monitored for one storm per quarter.

Timeframe/timeline

Field Test: Feb 2017-Feb 2019

Parameters measured

Hydrology

Saturated hydraulic conductivity (Ksat)

Soil temperature & moisture

Chemistry

E. coli

Fecal coliform

Total suspended solids

Dissolved organic carbon

Total organic carbon

Total and dissolved metals (As, Cd, Cu, Cr, Ni, Pb, Zn)

Polycyclic aromatic hydrocarbons (PAHs)

Alkalinity

pH

Biological & chemical oxygen demand

Nutrients (ortho-P, total P, nitrate+nitrite, ammonia, total Kjeldahl N)

Toxicology

Zebrafish (Danio rerio) embryo survival and sublethal morphometrics (length, eye area, pericardial area)

Partners

USFWS Environmental Contaminants Division

Funders

SAM (Stormwater Action Monitoring)

Project Reports

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