QSTI Group 1A Exam guide include USA Epa methods

#thelastofus primary difference between the **Group 1** and **Group 1A** exams lies in their technical focus and the specific EPA methods they cover. While Group 1 is a comprehensive exam covering both flow and particulate matter, Group 1A is more narrowly focused on gas flow rate measurements. ### Key Differences in Focus and Methods * **Subject Matter:** * **Group 1:** Titled "Manual Gas Volume and Flow Measurements and **Isokinetic Particulate Sampling Methods**." It covers both gas flow and the sampling of particulate matter. * **Group 1A:** Titled "**Stack Gas Flow Rate Measurements** Sampling Methods." Its focus is strictly on gas flow rate measurements. * **Included Methods:** * **Group 1** includes all the methods in Group 1A plus several **particulate matter (PM) methods**, such as Methods 5, 5A, 5B, 5D, 5E, 5F, 5I, 17, 201A, and 202. * **Group 1A** covers Methods 1, 2, 2A, 2C, 2D, 2F, 2G, 2H, 3, 3B, 4, and 19. It specifically includes references to **Method 5 dry gas meter (DGM) calibration procedures** within its coverage of Method 4, but it does not test on the actual particulate sampling procedures found in Group 1. ### Administrative Differences * **Availability:** Group 1 was first available in March 2004, whereas Group 1A was introduced later in March 2013. * **Latest Updates:** Group 1 was most recently updated in **2021**, while the latest update for Group 1A was in **2016**. Both exams follow the same basic structure: they consist of **50 questions**, require a **passing score of 40**, and the results remain valid for **five years**. #QstiPrepAcademy #stacktesting #fugitive #opacity #Noise #airquality #monitoring #EPAMethods #Environmental #services