The project focused on the adequacy of the EPA's previously recommended phase contrast light microscope (PCM) method of analysis and sample collection technique. The PCM method was compared with transmission electron microscope (TEM) methods and the feasibility of an alternative 'aggressive' sampling technique was investigated. The results of the study established the advantages and limitations of applying both PCM and TEM analytical methods, both separately and in conjunction with an aggressive sampling technique in the evaluation of air quality following asbestos abatement. The project was conducted during the post abatement phase of asbestos removal. Reliable methods of air sampling and analysis permit the use of monitoring results to be included in evaluating the efficacy of asbestos abatement methods and in developing better technical guidance for abatement contractors, building owners, and other parties directly responsible for remedial asbestos programs.