New
TLV? exposure limit: Measuring
hydrogen sulfide. ... In February 2010, the American Conference of Governmental Industrial Hygienists (
ACGIH?) adopted a new threshold limit value (
TLV?) recommendation for
H2S, lowering the 8-hour TWA to 1.0 ppm, and the STEL to 5.0 ppm.Jun 2, 2011
read more >>