What criteria define a suitable location to take a stack sample?
Approved method AS 4323.1-1995 is the method that can be used at all industrial premises under all circumstances. However, USEPA Method 1 is an alternative approved method suitable for use under approved circumstances, as outlined in section 2 of AMSAAP. AS 4323.1-1995 (the ‘Standard’) outlines two considerations for locating a suitable sampling plane: physical location and characteristics for suitable gas flow. Location criteria The further the sampling plane is from a disturbance to emission gas flow, such as a bend or a fan, the more suitable the gas flow characteristics will be for sampling at that location. The Standard specifies how close to a flow disturbance a sampling plane can be located. Two types of sampling plane location are described in the Standard: ideal and non-ideal. A third type of sampling plane can be inferred, which is a non-compliant sampling plane. An ‘ideal sampling plane’ complies with the minimum distances specified in Table 1 of the Standard. An ideal sampl
