An interlaboratory comparison using three materials has been organized to assess the agreement among laboratories undertaking tests to characterize the emission of volatile organic compounds from indoor materials and products using small test chambers. The twenty participating laboratories showed the following main results. Chambers of different materials (glass and stainless steel) and of widely different capacity (0.035 to 1475 l) appeared equally suitable. The repeatability of duplicate measurements (including sampling) within each laboratory was good.

This report is concerned with the strategy and methodology for investigating four major categories of biological particles in the indoor air of private houses, non-industrial workplaces and public buildings (excluding hospitals). These particles are mites and their faeces; dander from pets and other furred animals; fungi, including moulds and yeasts; and bacteria, including actinomycetes.

These Guidelines recommend the ventilation required to obtain a desired indoor air quality in a space. The first step is to decide the air quality aimed for in the ventilated space. A certain air quality is prescribed to avoid adverse health effects while a decision is required on the level of perceived air quality aimed for in the ventilated space. Three different comfort levels are suggested. The next step is to determine the pollution load on the air caused by pollution sources in the space.

The report contains a summary discussion of human health effects linked to indoor air pollution (IAP) in homes and other non-industrial indoor environments. Rather than discussing the health effects of the main different pollutants which can be found in indoor air, the approach has been to group broad categories of adverse health effects in separate chapters, and describe the relevant indoor exposures which may give rise to these health effects.

This report gives short descriptions of 325 research projects and investigations originating from 14 European countries and the Joint Research Centre aimed at understanding causes and/or effects of inadequate indoor air quality and at removing or mitigating such causes. The descriptions contain the project title, keywords, name, address and phone number of the principal investigator(s) and the year of the project start and expected project end.

The report describes procedures for determining emissions of volatile organic com- pounds from indoor materials and products using small environmental test chambers. Consideration is given to facilities and equipment, sample collection and analysis, experimental design and procedures and to data analysis. The techniques presented are useful for both routine product testing and in depth investigations by indoor air quality researchers.

The report summarizes information on indoor pollution by formaldehyde (HCHO) in European countries participating in the concerted action "Indoor Air Quality and Its Impact on Man" (COST project 613). Major scope of the report is to give concise information to people involved in research planning, policy making and regulatory activities and to identify a European view of the issue. The summary includes a short review of health effects of formaldehyde, of existing air quality guidelines and standards and of indoor sources of formaldehyde.

The document addresses the questions when, for what period of time, how often and where samples should be taken for the in-field analysis of chemical compounds in indoor air. It is divided into two parts. In the first part, a more detailed discussion of the dynamics of the indoor environment and of the objectives of Indoor pollution measurements is given In addition, general rules are derived for an optimal strategy to answer the above mentioned questions.

Information on the projects is contained on formatted sheets three of which are accommodated on each page. The projects of each country are grouped together. An identification number has been attributed to each project composed of the country code as used for automobiles and a number. Numbers are sequential and start from 1. They are attributed arbitrarily and may differ from one edition of the inventory to the next.

The report aims at giving a guide to those facing the problem of "sick building syndrome". After a description of the other building related illnesses, which must not be confused with the syndrome in object, the extent of the problem is presented, with particular emphasis on the economic implications. The report deals also with the symptoms which must be present in order to diagnose the syndrome and with the various environmental and personal factors possibly contributing to the development of the trouble.