How must I monitor opacity for air curtain incinerators that burn 100 percent yard waste?

40 C.F.R. § 60.1925
in effect
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(a) Use EPA Reference Method 9 in appendix A of this part to determine compliance with the opacity limit. (b) Conduct an initial test for opacity as specified in § 60.8. (c) After the initial test for opacity, conduct annual tests no more than 13 calendar months following the date of your previous test.
Source: ecfr_bulkFetched: 7/26/2026
Source: eCFR APIURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-40.xml?part=60Fetched: 5/31/2026

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