tailieunhanh - Air Sampling and Industrial Hygiene Engineering - Chapter 6

Đánh giá rủi ro sinh học Cho rằng rất nhiều trong những vấn đề không khí trong nhà (cho dù là trên các trang web khắc phục hậu quả hoặc ở nơi khác) được gây ra bởi các chất gây ô nhiễm sinh học và các sản phẩm phân hủy của họ, Chương 6 cung cấp các ví dụ thực tế của các giao thức giám sát sinh học. Tất cả các mẫu sinh phẩm phải đưa vào tài khoản yếu tố môi trường xung quanh và sử dụng xây dựng. Vẽ một lịch sử đầy đủ và trong một số. | CHAPTER 6 Biological Risk Assessment Given that many of the indoor air problems whether on remediation sites or elsewhere are caused by biological contaminants and their decomposition products Chapter 6 provides real-world examples of biological monitoring protocols. All sampling for biologicals must take into account surrounding environmental factors and building usage. Drawing a complete history and in some cases additional types of air sampling for other contaminants are required. In discussing sampling for biologicals we will also discuss the reasons for concern and control mechanisms that can be used. You must always remember that biologicals unlike chemical contaminants have the potential to reproduce and thus grow in numbers. Care must be taken to sample in a consistent fashion in as short a period as possible. Reproduction of biologicals also calls into question the relative viability of spores and bacterial colonies that are encysted. In cases where amplification is primarily bacterial these colonies may inhibit spores from developing into vegetative structures. Consequently comparative levels for bacterial counts and mold colony forming units CFUs may be required especially since spores in and of themselves can be problematic. Thus the absence of visible mold growth may not be indicative of a clean environment. When molds are amplified to the extent that the building is increasingly hospitable to further mold growth we may begin to see pathogenic colonies that would not otherwise be present taking hold in a building s interior. All of us exhibit great concern when confronted with possible Stachybotrys atra Stachy . Airstream movement does not readily spread Stachy as the spores become less viable in dry airstream environments. However in moisture-laden airstreams or within homes with other amplified mold colonies Stachy may begin to flourish. In areas where bird or other animal droppings are prevalent we begin to be concerned about histoplasmosis and .