EPA Action Guides

Instrumentation for Emergency, Investigatory, and Remedial Response

Combustible Gases
< 10% LEL Continue monitoring
< 5%* LEL Continue with caution
10 — 25% LEL Continue monitoring with Extreme Caution
> 25%
>5%*
*Confined Space
LEL Explosion Hazard
withdraw from area Immediately

Oxygen Concentrations

Oxygen Concentrations
< 19.5% Must wear SCBA
19.9 — 25% Continue monitoring with caution SCBA not needed based on O2
> 25% Discontinue monitoring Fire, Consult Fire

Toxic Gases and Vapors

Toxic Gases and Vapors
  > IDLH SCBA required  

PREFACE INTRODUCTION APPLICATION EPA GUIDELINES INSTRUMENT MAILING LIST