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Volume 4: Investigative approach for petroleum VIAP
Unacceptable risks for the VIAP may pose both immediate threats to safety (e.g., fire or explosion potential from petroleum vapors or methane) and possible short-term adverse health effects (acute) from inhalation of toxic chemicals. While rare, the potential for these to occur is often the greatest after a new release but should be initially evaluated in the investigative process for structures within the lateral inclusion zone (LIZ).
NOTE: If strong petroleum odors are detected or combustible, explosive, or O2-deficient conditions are found to exist inside a building, then first responders should be contacted immediately.
The following scenarios are site conditions when short term or acute health effects are possible and need to be evaluated:
Additional Information is provided in Attachment A.4 on the acute vapor risks associated with petroleum.
