Which indicators are used to assess a potential hazardous materials release?

• A. Wind speed and humidity
• B. Dead animals and sick people
• C. Soil color and texture
• D. Traffic volume near site

Answer: (B)

When assessing a potential hazardous materials release, the clearest signals are signs of exposure in people and animals. Dead animals and sick people show that a toxic substance has entered the environment and is affecting living beings, which triggers immediate protective actions and further investigation. Meteorological factors like wind speed and humidity influence how a release disperses, but they do not by themselves prove that a release has occurred. Soil color and texture might hint at contamination in some situations, but they are not reliable rapid indicators in the field and require sampling to confirm. Traffic volume near the site doesn’t reflect exposure or release status and isn’t a meaningful indicator of a release.