Other Testing or Sampling: Did EPA take wipe samples on-site?
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In emergency response situations, EPA focuses on understanding how a person could contact contamination (also called exposure). Inhalation was the main way someone could be exposed to contamination from Moss Landing. To understand the risk of inhalation, monitoring and measuring the air was done.
It is not EPA’s standard practice to collect wipe samples during an emergency response, especially outdoors where conditions change frequently. Outdoors, it is difficult to determine when depositions were made and therefore results may not be representative of the effects from a fire.
Vistra performed wipe sampling on building materials within the fence line to screen for metals deposition onto surfaces. This data is included in the publicly available administrative record for the site.