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Person

Erinn L Scott

Biologist
Columbia Environmental Research Center

Email: escott@usgs.gov
Office Phone: 573-441-2943
ORCID: 0000-0001-5332-8219

Location
CERC - A-3 Main Office/LAb
4200 New Haven Road
Columbia , MO 65201
US

Supervisor: David Walters
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We investigated whether the length of time fire chemical weathers on a terrestrial substrate before mixing into aquatic environments alters the chemical’s toxicity when encountered by juvenile rainbow trout. We also looked at whether the type of substrate where the chemical is applied affects its toxicity to juvenile rainbow trout after mixing into water. Two fire chemicals (Phos Chek LC95A-R and Phos Chek MVP-Fx) were applied to four substrate media (low organic content soil, high organic content soil, duff, and gravel) and allowed to age on the substrate for 7, 14, 28 or 56 days. At the end of the assigned weathering period, 96-hour assays were conducted by adding water to the dosed substrate and stocking each...
Survival endpoints for juvenile rainbow trout (Oncorhynchus mykiss) and fathead minnows (Pimephales promelas) in response to exposure to wildland firefighting chemicals. Exposures were either attenuated or pulsed. For attenuated exposures, chemical treatment was applied at the beginning of the exposure and control water was added for the duration of the assay so chemical concentration gradually decreased over time. In pulsed exposures, organisms were exposed to chemical treatments for a set period of time and then moved to chambers without chemical applied. This data set includes data from seven assays and include treatments under various exposure conditions such as different background water hardness, chemical...
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We measured Survival endpoints for juvenile rainbow trout (Oncorhynchus mykiss) in response to exposure to wildland fire retardants. Exposures were <24 hours. We documented time to mortality hourly through 12 hours of exposure and again at 24 hours. This data set includes data for three current use fire retardants from the US Forest Service Qualified Products List (Phos-Chek 259-Fx, Phos-Chek MVP-Fx, and Phos-Chek LC-95A-R). Also included are water quality data measured in each treatment at the beginning of each assay and quality assurance/ quality control data which validates the accuracy of those water quality measurements.
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