N.M. Admin. Code § 20.2.18.113 - OPACITY DETERMINATIONS
Opacity of emissions from oil burning equipment subject to this Part shall be determined consistent with the method set forth by the US EPA at 40 CFR, Part 60, Appendix A, Method 9 or any other equivalent method receiving prior approval from the Department. The time period for taking opacity readings shall be for a minimum of six minutes.
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