Are Summa canisters allowed with Method 18?
NO. Canisters are not an allowed sampling option under Method 18. Summa canisters have been shown to be reactive to polar compounds, which would result in sample loss. The only exception to this rule is during the presurvey, where canisters are permitted [a presurvey (Section 16.1) is conducted if the source does not know what pollutants are being emitted; a presurvey is qualitative in nature and after the source determines what pollutants are being emitted, they must conduct the full Method 18 with the sampling and analytical techniques allowed by the method]. Is a filter used in the sampling train? A filter may be needed if particulate is present in the stack. A glass wool plug or a filter may be used in these instances. Are samples integrated or real time? When direct interface or dilution interface is used for sampling, results are in real time (although not continuous). Bag sampling and adsorbent tube sampling provide integrated data. Is there an allowed limit for storing samples
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