EPA Method 10: Determination Of Carbon Monoxide Emissions From Stationary Sources (Instrumental...

EPA Method 3A is a procedure for measuring oxygen (O2) and carbon dioxide (CO2) in stationary source emissions using a continuous instrumental analyzer. The use of Method 3A may be required by specific New Source Performance Standards, Clean Air Marketing Rules and State Implementation Plans and permits where measurements of O2 and CO2 concentrations in stationary source emissions must be made, either to determine compliance with an applicable emission standard or to conduct performance testing of a continuous emission monitoring system (CEMS). Other regulations may also require the use of Method 3A. The components of the measurement system are described (as applicable) in sections 6.1 and 6.2 of Method 7E, except that the analyzer described in section 6.2 of this method must be used instead of the analyzer described in Method 7E. You must follow the noted specifications in section 6.1 of Method 7E except that the requirements to use stainless steel, Teflon, or non-reactive glass filters do not apply. Also, a heated sample line is not required to transport dry gases or for systems that measure the O2 or CO2 concentration on a dry basis, provided that the system is not also being used to concurrently measure SO2 and/or NOx. Read More

EPA Method 6C is a procedure for measuring sulfur dioxide (SO2) in stationary source emissions using a continuous instrumental analyzer. The use of Method 6C may be required by specific New Source Performance Standards, Clean Air Marketing rules, State Implementation Plans, and permits where SO2 concentrations in stationary source emissions must be measured, either to determine compliance with an applicable emission standard or to conduct performance testing of a continuous emission monitoring system (CEMS). Other regulations may also require the use of Method 6C. The essential components of the measurement system are the same as those in sections 6.1 and 6.2 of Method 7E, except that the SO2 analyzer described in section 6.2 of this method must be used instead of the analyzer described in section 6.2 of Method 7E. You must follow the noted specifications in section 6.1 of Method 7E. You may use an instrument that uses an ultraviolet, nondispersive infrared, fluorescence, or other detection principles to continuously measure SO2 in the gas stream and meets the performance specifications in section 13.0. The low-range and dual-range analyzer provisions in sections 6.2.8.1 and 6.2.8.2 of Method 7E apply. Read More

EPA Method 7E is a procedure for measuring nitrogen oxides (NOx) in stationary source emissions using a continuous instrumental analyzer. The use of Method 7E may be required by specific New Source Performance Standards, Clean Air Marketing rules, State Implementation Plans, and permits where measurement of NOx concentrations in stationary source emissions is required, either to determine compliance with an applicable emissions standard or to conduct performance testing of a continuous monitoring system (CEMS). Other regulations may also require the use of Method 7E. Method 7E is designed to provide high-quality data for determining compliance with Federal and State emission standards and for relative accuracy testing of CEMS. In these and other applications, the principal objective is to ensure the accuracy of the data at the actual emission levels Method 7E 5/21/2018 encountered. To meet this objective, the use of EPA traceability protocol calibration gases and measurement system performance tests are required. In this method, a sample of the effluent gas is continuously sampled and conveyed to the analyzer for measuring the concentration of NOx. You may measure NO and NO2 separately or simultaneously together but, for the purposes of this method, NOx is the sum of NO and NO2. You must meet the performance requirements of this method to validate your data. Read More