40 CFR § 62.14820
How must I monitor opacity for air curtain incinerators that burn 100 percent wood wastes, clean lumber, and/or yard waste?
June 9, 2020
(a) Use Method 9 of 40 CFR part 60, appendix A to determine compliance with the opacity limitation.
(b) Conduct an initial test for opacity as specified in §60.8 no later than January 2, 2005.
(c) After the initial test for opacity, conduct annual tests no more than 12 calendar months following the date of your previous test.