{"data":{"id":"us/40-cfr-60.6670","jurisdiction":"us","citation":"40 CFR 60.6670","heading":"How must I monitor opacity for air curtain incinerators that burn 100 percent wood waste, clean lumber, and/or yard waste?","body":"(a) Use the procedures specified in Table 5 to Subpart WWWW to determine compliance with the opacity limit for air curtain incinerators under § 60.6665.\n(b) Conduct an initial test for opacity as specified in § 60.8 of subpart A of this part.\n(c) After the initial test for opacity, conduct annual tests (no less than 9 calendar months and no more than 15 calendar months following the previous test). You must complete five performance tests in each 5-year calendar period.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 60—STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES","Subpart WWWW—Emission Guidelines and Compliance Times for Large Municipal Waste Combustors Constructed on or Before January 23, 2024"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"a0709ecef29ea5b2c5b4f3c666c6e650e97c0339e69e7975b8d447f7a735ce67","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-60.6665","next":"us/40-cfr-60.6675"},"notice":"GroundRules: Original legal text. Not legal advice."}