## What is Threshold Limit Value (TLV)?

Construction workers are mostly exposed to a variety of health hazards every day. These men and women have the potential for becoming ill, sick and disabled for life. For e.g. if the worker is exposed to hazardous material – heavy metals on the job can be unknowingly brought back to the worker’s home such as lead dust, concrete crusted clothing & variety of greases, oils and solvents can all be unintentionally poising your family!

Therefore wearing personal protective equipment on the construction site and do not bring home the health hazards that can harm your family!

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##### Must Read: Safety Measures while using Concrete Mixer at Site

Here, the Threshold limit value (TLV) is used to describe the limit below which the adult workers can be safely exposed to a substance on a daily basis. Threshold limit values are the maximum average airborne concentration of a hazardous material to which the healthy workers can be exposed during day after day for a working lifetime without experiencing any adverse health effects.

The main purpose of establishing the threshold limit value is to safeguard the health of workers.

Generally, it refers to the airborne concentration of contaminants currently accepted by the American Conference of Governmental Industrial Hygienists and represents conditions under which it is believed that nearly all occupants may be repeatedly exposed, day after day, without adverse effect.

This organization developed the threshold limit values in the 1940s and 1950s through extensive research, and these values serve as a guide for industries for the protection of their adult workers. These values are applied in industrial ventilation, biological exposure and chemical substances in the workplace.

The substances which are included in the study of threshold limit value includes the workplace fumes, mists, gases, vapour, sprays, and dusts. All these substances have their own units of measurement. Vapours and gases are measured in parts per million (PPM), and separate into small particles such as mists, smoke, fumes, and dusts are measured in milligrams per cubic meter.

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