Nguồn thử nghiệm đo nồng độ chất gây ô nhiễm không khí và / hoặc số lượng tại một nguồn hoặc chồng. Thuật ngữ của nó bằng cách sử dụng các phương pháp thử nghiệm để đo lường tập trung vào một thời gian cơ sở một hoặc ảnh chụp, như trái ngược với liên tục giám sát các nguồn như được thảo luận trong Chương 6. Kiểm tra nguồn có thể được thực hiện để cung cấp các dữ liệu thiết kế để đo hiệu suất của một quá trình, hoặc nó có thể được quy định trên cơ. | 5 Source Testing INTRODUCTION Source testing is measuring the air pollutant concentration and or quantity at a source or stack. The terminology implies using test methods to measure concentration on a one-time or snapshot basis as opposed to continuously monitoring the source as discussed in Chapter 6. Source testing may be performed to provide design data or to measure performance of a process or it may be prescribed on a periodic basis to demonstrate compliance with air permit emission limitations. Most source test procedures require labor to set up the test collect samples and analyze the results. CODE OF FEDERAL REGULATIONS The gospel of source testing is the Code of Federal Regulations 40 CFR Part 60 Appendix Very specific test procedures with step-by-step instructions are detailed in the CFR. A list of source test methods that are described in the CFR is provided in Table . These procedures have been tested reviewed and adopted by the EPA as the reference source test methods for a number of pollutants in a variety of applications. The universality of these test methods makes it easy for those practicing in the field to know just how a source test was conducted and understand its limitations just by giving a shorthand reference such as Method 8. Of course the CFR test methods cannot be applied to all possible applications because it would have been impossible to evaluate and fund the research required for all circumstances. It would be an inefficient use of public funds for the EPA to sponsor research for test methods that cover unusual operating conditions for a unique process and it is impossible to predict future processes conditions and improvements. Sometimes experience judgment and skill are needed to modify the test method to overcome a limitation that arises in a specific application. In such cases test reports can reference the test method and describe the modification. REPRESENTATIVE SAMPLING TECHNIQUES Gaseous Pollutants One
