Asbestos exposure limit reduced.


Sick buildings: physical and psychosocial features, effects on humans and preventive measures.

Analysis of five papers given at the Symposium on Sick Buildings. Conclusions are that the cause of sick building syndrome must be psychosocial, physical, chemical or biological. Symptoms are different from symptoms of mass psychogenic illne

Passive smoking and health effects.

Methods of monitoring passive smoking vary in accuracy and expense. Annoyance is easily identified among smokers and non-smokers alike. Sensory irritation does occur, but the threshold is difficult to establish. Infections in children appear to be generally correlated with mother's smoking and by amount of smoking per day. The effect on children's lung function growth has been established, but amount varies. Passive smoking has a blunting effect on response to other irritants and asthmatics are more susceptible than others.

Formaldehyde: sources, methods of analysis, exposure and health effects.

Summary of conference discussions on formaldehyde, including character- ization, sources, measurement techniques, health effects, mitigation techniques and conclusions: 1. Elevated formaldehyde concentrations, higher than 100 ppb, are measured in many indoor environments. Formaldehyde concentrations relate positively with temperature and decrease with the age of the source. 2. Urea formaldehyde bonded products can be improved to such a degree that indoor levels can be reduced to ambient levels if the materials are properly installed and used. 3.

Ventilation '85.

Provides the text of the 68 papers presented at the symposium, arranged under the following headings - Plenary session, Advanced developments in ventilation, Control of toxic and explosive contaminants, Advances in tracer gas use, Ventilation for residential and modern office buildings, Advances in local exhaust technology, Ventilation for control of carcin- ogens and biohazards, Ventilation measurement and control, Sources emission rates, Filters, Air recirculation and energy conservation.