Csst Exam Study Prep (Review In Progress... Again. 12/3/18)

What is "point counting?" {Ans: Point counting is the name of an analytical counting technique used to make PLM results more accurate at asbestos concentrations below 10%, and especially near the important regulatory threshold of one percent. To put it simply, the analyst observes more area of the sample allowing a more accurate estimate on the quantity of asbestos. In PLM analysis, the amount of asbestos in a material is quantified by visual estimation. This is not reliable below 1% and the EPA states that any material under 10% should be point counted to determine if it is in fact an ACM or not. There are two point count methods commonly available, 400 and 1000. The number refers to the amount of points analyzed. The more the points the lower the limit of quantification.}When are asbestos medical surveillance physical exams required ? {Ans: 1. Prior to assignment of the employee to an area where negative- pressure respirators are worn; 2. When the employee is assigned to an area where exposure to asbestos may be at or above the permissible exposure limit for 30 or more days per year, or engage in Class I, II or III work for