In practice, many Collegedale residents’ concerns start after a diagnosis—then they look back at the places and routines where exposure may have happened. Common patterns we see include:
- Residential landscaping and lawn care: trimming, mowing, or working near areas treated days or weeks earlier.
- Secondhand exposure: residue carried home on work clothes, boots, or tools from a landscaping job or maintenance work.
- Service and maintenance settings: facilities that routinely manage grounds vegetation, including contract crews.
- Seasonal community property work: repeated seasonal applications where people are present outdoors during or shortly after spraying.
Because these exposures can be spread across months (or years), the most important task is reconstructing a credible timeline—what was applied, when it was applied, and who was near it.


