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Case Study

Ecological Exposure Monitoring

From 2003-2010, Waterborne initiated an ecological exposure monitoring program for an herbicide. Sampling locations were set up at the outlets of watersheds in streams based on potential herbicide use and watershed characteristics. For each watershed, four-day grab samples were collected during the five-month growing season or autosamplers were used.

Our Findings

Monitoring of over 45 corn and sorghum agricultural watersheds in Midwestern and Southeastern states has produced nearly 120 “site years” of land use, water residue, total suspended solids, meteorological and stream flow data. Results to date show that the study design adequately captured herbicide runoff events following chemical applications for each growing season.

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