Anyone can get lead poisoning; however, the risk to children under seven years old is the highest. The chemical analysis consists of measuring seven trace elements--arsenic, antimony, tin, copper, bismuth, silver, and cadmium-that typically are present in a bullet's lead alloy.
A general recommendation is that the temperature be held constant in the range of 21-23Â°C (69-73Â°F). In summertime when outdoor temperatures are higher it is advisable to keep air-conditioned offices slightly warmer to minimize the temperature discrepancy between indoors and outdoors.
Even at the lower temperatures likely to be experienced in classrooms, however, heat leads to a loss of concentration and increased tiredness, which means that teachers are more likely to put themselves or others at risk.UT policy, therefore, as agreed at Annual Conference 2007, is that 26Â°C should be the absolute maximum temperature in which teachers should be expected to work, other than for very short periods. It is important that all schools have in place contingency plans to help staff and pupils cope with the heat.