"A brief glance at the headlines show significant advances in adversarial threats in just the last five years, and we are operating in an environment today where those threats will likely only continue to proliferate," said Dietmar Thelen, managing director of the TLVS
At present time, a threshold limit value (TLV
) for asphalt fumes of 0.5 mg/[m.sup.3] (8-hr time-weighted average) is recommended by the American Conference of Governmental Industrial Hygienists (ACGIH 2002).
The American Conference of Governmental Industrial Hygienists established a threshold limit value (TLV
) of 50 ppm, intended to protect against fatigue, headache, and irritability (ACGIH 2000).
Rappaport, Implications of OSHA's Reliance on TLVs
in Developing the Air Contaminants Standard, 19 Am.
LLDP is a TLV
(Type/Length/Value, i.e., key-value pair with length information) based protocol where TLVs
are used for property description.
and Beis: Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices.
The speciation of Ni in real environmental samples allowed us to compare our results with the TLVs
proposed by the different agencies and regulations, which is not possible with the sole determination of the total metallic Ni.
These concentrations are below the threshold limit values (TLVs
) for 8 hours of work in Chile: 300 and 347 mg/[m.sup.3], respectively.
[55.] American Conference of Governmental Industrial Hygienists: TLVs
and BEIs threshold limit values for chemical substances and physical agents and biological exposure indices.
What is common with both PELs and TLVs
is that the lower the limit number, the more toxic the chemical.
An issue that should be considered beforehand is that although IEs TLVs
are usually transmitted in ascending order of the IE type, we have observed that some implementations transmit different orderings of IEs.