In February, the American Conference of Governmental Industrial Hygienists (ACGIH) approved and officially changed their threshold limit value (TLV) recommendation for hydrogen sulfide. Just 1 year ...

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To more fully understand how threshold limit value (TLV) relates to the work you're doing, here are some examples of where various industrial chemicals fit on the spectrum: TLV of 1,000 ppm or higher: ...

Mines Ministry will today take up the issue of threshold limit value (TLV) on beach sand minerals or heavy minerals, which the mining industry says can adversely impact the companies if implemented.